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osslsigncode/osslsigncode.c
olszomal a79c0c6426 is_indirect_data_signature()
2020-04-01 13:25:58 +02:00

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/*
OpenSSL based Authenticode signing for PE/MSI/Java CAB files.
Copyright (C) 2005-2015 Per Allansson <pallansson@gmail.com>
Copyright (C) 2018-2020 Michał Trojnara <Michal.Trojnara@stunnel.org>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
In addition, as a special exception, the copyright holders give
permission to link the code of portions of this program with the
OpenSSL library under certain conditions as described in each
individual source file, and distribute linked combinations
including the two.
You must obey the GNU General Public License in all respects
for all of the code used other than OpenSSL. If you modify
file(s) with this exception, you may extend this exception to your
version of the file(s), but you are not obligated to do so. If you
do not wish to do so, delete this exception statement from your
version. If you delete this exception statement from all source
files in the program, then also delete it here.
*/
/*
Implemented with good help from:
* Peter Gutmann's analysis of Authenticode:
https://www.cs.auckland.ac.nz/~pgut001/pubs/authenticode.txt
* MS CAB SDK documentation
https://docs.microsoft.com/en-us/previous-versions/ms974336(v=msdn.10)
* MS PE/COFF documentation
https://docs.microsoft.com/en-us/windows/win32/debug/pe-format
* MS Windows Authenticode PE Signature Format
http://msdn.microsoft.com/en-US/windows/hardware/gg463183
(Although the part of how the actual checksumming is done is not
how it is done inside Windows. The end result is however the same
on all "normal" PE files.)
* tail -c, tcpdump, mimencode & openssl asn1parse :)
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif /* HAVE_CONFIG_H */
#ifdef HAVE_WINDOWS_H
#define NOCRYPT
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
typedef unsigned char u_char;
#endif /* HAVE_WINDOWS_H */
#include <stdio.h>
#include <stdbool.h>
#include <stdlib.h>
#ifndef _WIN32
#include <unistd.h>
#endif /* _WIN32 */
#include <string.h>
#include <time.h>
#include <ctype.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#ifndef _WIN32
#ifdef HAVE_SYS_MMAN_H
#include <sys/mman.h>
#endif /* HAVE_SYS_MMAN_H */
#ifdef HAVE_TERMIOS_H
#include <termios.h>
#endif /* HAVE_TERMIOS_H */
#endif /* _WIN32 */
#ifdef WITH_GSF
#include <gsf/gsf-infile-msole.h>
#include <gsf/gsf-infile.h>
#include <gsf/gsf-input-stdio.h>
#include <gsf/gsf-outfile-msole.h>
#include <gsf/gsf-outfile.h>
#include <gsf/gsf-output-stdio.h>
#include <gsf/gsf-utils.h>
#endif /* WITH_GSF */
#include <openssl/err.h>
#include <openssl/objects.h>
#include <openssl/evp.h>
#include <openssl/x509.h>
#include <openssl/x509v3.h> /* X509_PURPOSE */
#include <openssl/pkcs7.h>
#include <openssl/pkcs12.h>
#include <openssl/pem.h>
#include <openssl/asn1t.h>
#include <openssl/conf.h>
#ifndef OPENSSL_NO_ENGINE
#include <openssl/engine.h>
#endif /* OPENSSL_NO_ENGINE */
#ifdef ENABLE_CURL
#ifdef __CYGWIN__
#ifndef SOCKET
#define SOCKET UINT_PTR
#endif /* SOCKET */
#endif /* __CYGWIN__ */
#include <curl/curl.h>
#define MAX_TS_SERVERS 256
#endif /* ENABLE_CURL */
#ifndef FALSE
#define FALSE 0
#endif
#ifndef TRUE
#define TRUE 1
#endif
#define GSF_CAN_READ_MSI_METADATA
#if defined (HAVE_TERMIOS_H) || defined (HAVE_GETPASS)
#define PROVIDE_ASKPASS 1
#endif
/* MS Authenticode object ids */
#define SPC_INDIRECT_DATA_OBJID "1.3.6.1.4.1.311.2.1.4"
#define SPC_STATEMENT_TYPE_OBJID "1.3.6.1.4.1.311.2.1.11"
#define SPC_SP_OPUS_INFO_OBJID "1.3.6.1.4.1.311.2.1.12"
#define SPC_MS_JAVA_SOMETHING "1.3.6.1.4.1.311.15.1"
#define SPC_PE_IMAGE_DATA_OBJID "1.3.6.1.4.1.311.2.1.15"
#define SPC_CAB_DATA_OBJID "1.3.6.1.4.1.311.2.1.25"
#define SPC_TIME_STAMP_REQUEST_OBJID "1.3.6.1.4.1.311.3.2.1"
#define SPC_SIPINFO_OBJID "1.3.6.1.4.1.311.2.1.30"
#define SPC_PE_IMAGE_PAGE_HASHES_V1 "1.3.6.1.4.1.311.2.3.1" /* Page hash using SHA1 */
#define SPC_PE_IMAGE_PAGE_HASHES_V2 "1.3.6.1.4.1.311.2.3.2" /* Page hash using SHA256 */
#define SPC_NESTED_SIGNATURE_OBJID "1.3.6.1.4.1.311.2.4.1"
#define SPC_RFC3161_OBJID "1.3.6.1.4.1.311.3.3.1"
#define SPC_AUTHENTICODE_COUNTER_SIGNATURE_OBJID "1.2.840.113549.1.9.6"
#define SPC_UNAUTHENTICATED_DATA_BLOB_OBJID "1.3.6.1.4.1.42921.1.2.1"
#define SPC_TIMESTAMP_SIGNING_TIME_OBJID "1.2.840.113549.1.9.5"
#define SPC_SIGNING_TIME_OBJID "1.2.840.113549.1.9.5"
/* 1.3.6.1.4.1.311.4... MS Crypto 2.0 stuff... */
#define WIN_CERT_REVISION_2 0x0200
#define WIN_CERT_TYPE_PKCS_SIGNED_DATA 0x0002
/*
* FLAG_PREV_CABINET is set if the cabinet file is not the first in a set
* of cabinet files. When this bit is set, the szCabinetPrev and szDiskPrev
* fields are present in this CFHEADER.
*/
#define FLAG_PREV_CABINET 0x0001
/*
* FLAG_NEXT_CABINET is set if the cabinet file is not the last in a set of
* cabinet files. When this bit is set, the szCabinetNext and szDiskNext
* fields are present in this CFHEADER.
*/
#define FLAG_NEXT_CABINET 0x0002
/*
* FLAG_RESERVE_PRESENT is set if the cabinet file contains any reserved
* fields. When this bit is set, the cbCFHeader, cbCFFolder, and cbCFData
* fields are present in this CFHEADER.
*/
#define FLAG_RESERVE_PRESENT 0x0004
#define INVALID_TIME ((time_t)-1)
typedef struct {
char *infile;
char *outfile;
char *sigfile;
char *certfile;
char *xcertfile;
char *keyfile;
char *pvkfile;
char *pkcs12file;
int output_pkcs7;
char *p11engine;
char *p11module;
int askpass;
char *readpass;
char *pass;
int comm;
int pagehash;
char *desc;
const EVP_MD *md;
char *url;
time_t signing_time;
#ifdef ENABLE_CURL
char *turl[MAX_TS_SERVERS];
int nturl;
char *tsurl[MAX_TS_SERVERS];
int ntsurl;
char *proxy;
int noverifypeer;
#endif /* ENABLE_CURL */
int addBlob;
int nest;
int verbose;
#ifdef WITH_GSF
int add_msi_dse;
#endif /* WITH_GSF */
char *cafile;
char *crlfile;
char *untrusted;
char *leafhash;
int jp;
} GLOBAL_OPTIONS;
typedef struct {
size_t header_size;
int pe32plus;
unsigned short magic;
unsigned int pe_checksum;
size_t nrvas;
size_t sigpos;
size_t siglen;
size_t fileend;
size_t flags;
} FILE_HEADER;
typedef struct {
EVP_PKEY *pkey;
X509 *cert;
STACK_OF(X509) *certs;
STACK_OF(X509) *xcerts;
} CRYPTO_PARAMS;
#ifdef WITH_GSF
typedef struct {
GsfOutfile *outole;
GsfOutput *sink;
u_char *p_msiex;
int len_msiex;
} GSF_PARAMS;
#endif /* WITH_GSF */
/*
* ASN.1 definitions (more or less from official MS Authenticode docs)
*/
typedef struct {
int type;
union {
ASN1_BMPSTRING *unicode;
ASN1_IA5STRING *ascii;
} value;
} SpcString;
DECLARE_ASN1_FUNCTIONS(SpcString)
ASN1_CHOICE(SpcString) = {
ASN1_IMP_OPT(SpcString, value.unicode, ASN1_BMPSTRING, 0),
ASN1_IMP_OPT(SpcString, value.ascii, ASN1_IA5STRING, 1)
} ASN1_CHOICE_END(SpcString)
IMPLEMENT_ASN1_FUNCTIONS(SpcString)
typedef struct {
ASN1_OCTET_STRING *classId;
ASN1_OCTET_STRING *serializedData;
} SpcSerializedObject;
DECLARE_ASN1_FUNCTIONS(SpcSerializedObject)
ASN1_SEQUENCE(SpcSerializedObject) = {
ASN1_SIMPLE(SpcSerializedObject, classId, ASN1_OCTET_STRING),
ASN1_SIMPLE(SpcSerializedObject, serializedData, ASN1_OCTET_STRING)
} ASN1_SEQUENCE_END(SpcSerializedObject)
IMPLEMENT_ASN1_FUNCTIONS(SpcSerializedObject)
typedef struct {
int type;
union {
ASN1_IA5STRING *url;
SpcSerializedObject *moniker;
SpcString *file;
} value;
} SpcLink;
DECLARE_ASN1_FUNCTIONS(SpcLink)
ASN1_CHOICE(SpcLink) = {
ASN1_IMP_OPT(SpcLink, value.url, ASN1_IA5STRING, 0),
ASN1_IMP_OPT(SpcLink, value.moniker, SpcSerializedObject, 1),
ASN1_EXP_OPT(SpcLink, value.file, SpcString, 2)
} ASN1_CHOICE_END(SpcLink)
IMPLEMENT_ASN1_FUNCTIONS(SpcLink)
typedef struct {
SpcString *programName;
SpcLink *moreInfo;
} SpcSpOpusInfo;
DECLARE_ASN1_FUNCTIONS(SpcSpOpusInfo)
ASN1_SEQUENCE(SpcSpOpusInfo) = {
ASN1_EXP_OPT(SpcSpOpusInfo, programName, SpcString, 0),
ASN1_EXP_OPT(SpcSpOpusInfo, moreInfo, SpcLink, 1)
} ASN1_SEQUENCE_END(SpcSpOpusInfo)
IMPLEMENT_ASN1_FUNCTIONS(SpcSpOpusInfo)
typedef struct {
ASN1_OBJECT *type;
ASN1_TYPE *value;
} SpcAttributeTypeAndOptionalValue;
DECLARE_ASN1_FUNCTIONS(SpcAttributeTypeAndOptionalValue)
ASN1_SEQUENCE(SpcAttributeTypeAndOptionalValue) = {
ASN1_SIMPLE(SpcAttributeTypeAndOptionalValue, type, ASN1_OBJECT),
ASN1_OPT(SpcAttributeTypeAndOptionalValue, value, ASN1_ANY)
} ASN1_SEQUENCE_END(SpcAttributeTypeAndOptionalValue)
IMPLEMENT_ASN1_FUNCTIONS(SpcAttributeTypeAndOptionalValue)
typedef struct {
ASN1_OBJECT *algorithm;
ASN1_TYPE *parameters;
} AlgorithmIdentifier;
DECLARE_ASN1_FUNCTIONS(AlgorithmIdentifier)
ASN1_SEQUENCE(AlgorithmIdentifier) = {
ASN1_SIMPLE(AlgorithmIdentifier, algorithm, ASN1_OBJECT),
ASN1_OPT(AlgorithmIdentifier, parameters, ASN1_ANY)
} ASN1_SEQUENCE_END(AlgorithmIdentifier)
IMPLEMENT_ASN1_FUNCTIONS(AlgorithmIdentifier)
typedef struct {
AlgorithmIdentifier *digestAlgorithm;
ASN1_OCTET_STRING *digest;
} DigestInfo;
DECLARE_ASN1_FUNCTIONS(DigestInfo)
ASN1_SEQUENCE(DigestInfo) = {
ASN1_SIMPLE(DigestInfo, digestAlgorithm, AlgorithmIdentifier),
ASN1_SIMPLE(DigestInfo, digest, ASN1_OCTET_STRING)
} ASN1_SEQUENCE_END(DigestInfo)
IMPLEMENT_ASN1_FUNCTIONS(DigestInfo)
typedef struct {
SpcAttributeTypeAndOptionalValue *data;
DigestInfo *messageDigest;
} SpcIndirectDataContent;
DECLARE_ASN1_FUNCTIONS(SpcIndirectDataContent)
ASN1_SEQUENCE(SpcIndirectDataContent) = {
ASN1_SIMPLE(SpcIndirectDataContent, data, SpcAttributeTypeAndOptionalValue),
ASN1_SIMPLE(SpcIndirectDataContent, messageDigest, DigestInfo)
} ASN1_SEQUENCE_END(SpcIndirectDataContent)
IMPLEMENT_ASN1_FUNCTIONS(SpcIndirectDataContent)
typedef struct {
ASN1_BIT_STRING* flags;
SpcLink *file;
} SpcPeImageData;
DECLARE_ASN1_FUNCTIONS(SpcPeImageData)
ASN1_SEQUENCE(SpcPeImageData) = {
ASN1_SIMPLE(SpcPeImageData, flags, ASN1_BIT_STRING),
ASN1_EXP_OPT(SpcPeImageData, file, SpcLink, 0)
} ASN1_SEQUENCE_END(SpcPeImageData)
IMPLEMENT_ASN1_FUNCTIONS(SpcPeImageData)
typedef struct {
ASN1_INTEGER *a;
ASN1_OCTET_STRING *string;
ASN1_INTEGER *b;
ASN1_INTEGER *c;
ASN1_INTEGER *d;
ASN1_INTEGER *e;
ASN1_INTEGER *f;
} SpcSipInfo;
DECLARE_ASN1_FUNCTIONS(SpcSipInfo)
ASN1_SEQUENCE(SpcSipInfo) = {
ASN1_SIMPLE(SpcSipInfo, a, ASN1_INTEGER),
ASN1_SIMPLE(SpcSipInfo, string, ASN1_OCTET_STRING),
ASN1_SIMPLE(SpcSipInfo, b, ASN1_INTEGER),
ASN1_SIMPLE(SpcSipInfo, c, ASN1_INTEGER),
ASN1_SIMPLE(SpcSipInfo, d, ASN1_INTEGER),
ASN1_SIMPLE(SpcSipInfo, e, ASN1_INTEGER),
ASN1_SIMPLE(SpcSipInfo, f, ASN1_INTEGER),
} ASN1_SEQUENCE_END(SpcSipInfo)
IMPLEMENT_ASN1_FUNCTIONS(SpcSipInfo)
typedef struct {
AlgorithmIdentifier *digestAlgorithm;
ASN1_OCTET_STRING *digest;
} MessageImprint;
DECLARE_ASN1_FUNCTIONS(MessageImprint)
ASN1_SEQUENCE(MessageImprint) = {
ASN1_SIMPLE(MessageImprint, digestAlgorithm, AlgorithmIdentifier),
ASN1_SIMPLE(MessageImprint, digest, ASN1_OCTET_STRING)
} ASN1_SEQUENCE_END(MessageImprint)
IMPLEMENT_ASN1_FUNCTIONS(MessageImprint)
#ifdef ENABLE_CURL
typedef struct {
ASN1_OBJECT *type;
ASN1_OCTET_STRING *signature;
} TimeStampRequestBlob;
DECLARE_ASN1_FUNCTIONS(TimeStampRequestBlob)
ASN1_SEQUENCE(TimeStampRequestBlob) = {
ASN1_SIMPLE(TimeStampRequestBlob, type, ASN1_OBJECT),
ASN1_EXP_OPT(TimeStampRequestBlob, signature, ASN1_OCTET_STRING, 0)
} ASN1_SEQUENCE_END(TimeStampRequestBlob)
IMPLEMENT_ASN1_FUNCTIONS(TimeStampRequestBlob)
typedef struct {
ASN1_OBJECT *type;
TimeStampRequestBlob *blob;
} TimeStampRequest;
DECLARE_ASN1_FUNCTIONS(TimeStampRequest)
ASN1_SEQUENCE(TimeStampRequest) = {
ASN1_SIMPLE(TimeStampRequest, type, ASN1_OBJECT),
ASN1_SIMPLE(TimeStampRequest, blob, TimeStampRequestBlob)
} ASN1_SEQUENCE_END(TimeStampRequest)
IMPLEMENT_ASN1_FUNCTIONS(TimeStampRequest)
/* RFC3161 Time stamping */
typedef struct {
ASN1_INTEGER *status;
STACK_OF(ASN1_UTF8STRING) *statusString;
ASN1_BIT_STRING *failInfo;
} PKIStatusInfo;
DECLARE_ASN1_FUNCTIONS(PKIStatusInfo)
ASN1_SEQUENCE(PKIStatusInfo) = {
ASN1_SIMPLE(PKIStatusInfo, status, ASN1_INTEGER),
ASN1_SEQUENCE_OF_OPT(PKIStatusInfo, statusString, ASN1_UTF8STRING),
ASN1_OPT(PKIStatusInfo, failInfo, ASN1_BIT_STRING)
} ASN1_SEQUENCE_END(PKIStatusInfo)
IMPLEMENT_ASN1_FUNCTIONS(PKIStatusInfo)
typedef struct {
PKIStatusInfo *status;
PKCS7 *token;
} TimeStampResp;
DECLARE_ASN1_FUNCTIONS(TimeStampResp)
ASN1_SEQUENCE(TimeStampResp) = {
ASN1_SIMPLE(TimeStampResp, status, PKIStatusInfo),
ASN1_OPT(TimeStampResp, token, PKCS7)
} ASN1_SEQUENCE_END(TimeStampResp)
IMPLEMENT_ASN1_FUNCTIONS(TimeStampResp)
typedef struct {
ASN1_INTEGER *version;
MessageImprint *messageImprint;
ASN1_OBJECT *reqPolicy;
ASN1_INTEGER *nonce;
ASN1_BOOLEAN *certReq;
STACK_OF(X509_EXTENSION) *extensions;
} TimeStampReq;
DECLARE_ASN1_FUNCTIONS(TimeStampReq)
ASN1_SEQUENCE(TimeStampReq) = {
ASN1_SIMPLE(TimeStampReq, version, ASN1_INTEGER),
ASN1_SIMPLE(TimeStampReq, messageImprint, MessageImprint),
ASN1_OPT (TimeStampReq, reqPolicy, ASN1_OBJECT),
ASN1_OPT (TimeStampReq, nonce, ASN1_INTEGER),
ASN1_SIMPLE(TimeStampReq, certReq, ASN1_BOOLEAN),
ASN1_IMP_SEQUENCE_OF_OPT(TimeStampReq, extensions, X509_EXTENSION, 0)
} ASN1_SEQUENCE_END(TimeStampReq)
IMPLEMENT_ASN1_FUNCTIONS(TimeStampReq)
#endif /* ENABLE_CURL */
typedef struct {
ASN1_INTEGER *seconds;
ASN1_INTEGER *millis;
ASN1_INTEGER *micros;
} TimeStampAccuracy;
DECLARE_ASN1_FUNCTIONS(TimeStampAccuracy)
ASN1_SEQUENCE(TimeStampAccuracy) = {
ASN1_OPT(TimeStampAccuracy, seconds, ASN1_INTEGER),
ASN1_IMP_OPT(TimeStampAccuracy, millis, ASN1_INTEGER, 0),
ASN1_IMP_OPT(TimeStampAccuracy, micros, ASN1_INTEGER, 1)
} ASN1_SEQUENCE_END(TimeStampAccuracy)
IMPLEMENT_ASN1_FUNCTIONS(TimeStampAccuracy)
typedef struct {
ASN1_INTEGER *version;
ASN1_OBJECT *policy_id;
MessageImprint *messageImprint;
ASN1_INTEGER *serial;
ASN1_GENERALIZEDTIME *time;
TimeStampAccuracy *accuracy;
ASN1_BOOLEAN ordering;
ASN1_INTEGER *nonce;
GENERAL_NAME *tsa;
STACK_OF(X509_EXTENSION) *extensions;
} TimeStampToken;
DECLARE_ASN1_FUNCTIONS(TimeStampToken)
ASN1_SEQUENCE(TimeStampToken) = {
ASN1_SIMPLE(TimeStampToken, version, ASN1_INTEGER),
ASN1_SIMPLE(TimeStampToken, policy_id, ASN1_OBJECT),
ASN1_SIMPLE(TimeStampToken, messageImprint, MessageImprint),
ASN1_SIMPLE(TimeStampToken, serial, ASN1_INTEGER),
ASN1_SIMPLE(TimeStampToken, time, ASN1_GENERALIZEDTIME),
ASN1_OPT(TimeStampToken, accuracy, TimeStampAccuracy),
ASN1_OPT(TimeStampToken, ordering, ASN1_FBOOLEAN),
ASN1_OPT(TimeStampToken, nonce, ASN1_INTEGER),
ASN1_EXP_OPT(TimeStampToken, tsa, GENERAL_NAME, 0),
ASN1_IMP_SEQUENCE_OF_OPT(TimeStampToken, extensions, X509_EXTENSION, 1)
} ASN1_SEQUENCE_END(TimeStampToken)
IMPLEMENT_ASN1_FUNCTIONS(TimeStampToken)
static SpcSpOpusInfo* createOpus(const char *desc, const char *url)
{
SpcSpOpusInfo *info = SpcSpOpusInfo_new();
if (desc) {
info->programName = SpcString_new();
info->programName->type = 1;
info->programName->value.ascii = ASN1_IA5STRING_new();
ASN1_STRING_set((ASN1_STRING *)info->programName->value.ascii,
(const unsigned char*)desc, strlen(desc));
}
if (url) {
info->moreInfo = SpcLink_new();
info->moreInfo->type = 0;
info->moreInfo->value.url = ASN1_IA5STRING_new();
ASN1_STRING_set((ASN1_STRING *)info->moreInfo->value.url,
(const unsigned char*)url, strlen(url));
}
return info;
}
static size_t asn1_simple_hdr_len(const unsigned char *p, size_t len)
{
if (len <= 2 || p[0] > 0x31)
return 0;
return (p[1]&0x80) ? (2 + (p[1]&0x7f)) : 2;
}
/*
* Add a custom, non-trusted time to the PKCS7 structure to prevent OpenSSL
* adding the _current_ time. This allows to create a deterministic signature
* when no trusted timestamp server was specified, making osslsigncode
* behaviour closer to signtool.exe (which doesn't include any non-trusted
* time in this case.)
*/
static int pkcs7_add_signing_time(PKCS7_SIGNER_INFO *si, time_t signing_time)
{
if (signing_time == INVALID_TIME) /* -st option was not specified */
return 1; /* success */
return PKCS7_add_signed_attribute(si,
NID_pkcs9_signingTime, V_ASN1_UTCTIME,
ASN1_TIME_adj(NULL, signing_time, 0, 0));
}
static void tohex(const unsigned char *v, char *b, int len)
{
int i;
for(i=0; i<len; i++)
sprintf(b+i*2, "%02X", v[i]);
}
static int is_indirect_data_signature(PKCS7 *p7)
{
ASN1_OBJECT *indir_objid;
int retval;
indir_objid = OBJ_txt2obj(SPC_INDIRECT_DATA_OBJID, 1);
retval = p7 && PKCS7_type_is_signed(p7) &&
!OBJ_cmp(p7->d.sign->contents->type, indir_objid) &&
p7->d.sign->contents->d.other->type == V_ASN1_SEQUENCE;
ASN1_OBJECT_free(indir_objid);
return retval;
}
#ifdef ENABLE_CURL
static int blob_has_nl = 0;
static size_t curl_write(void *ptr, size_t sz, size_t nmemb, void *stream)
{
if (sz*nmemb > 0 && !blob_has_nl) {
if (memchr(ptr, '\n', sz*nmemb))
blob_has_nl = 1;
}
return BIO_write((BIO*)stream, ptr, sz*nmemb);
}
static void print_timestamp_error(const char *url, long http_code)
{
if (http_code != -1) {
fprintf(stderr, "Failed to convert timestamp reply from %s; "
"HTTP status %ld\n", url, http_code);
} else {
fprintf(stderr, "Failed to convert timestamp reply from %s; "
"no HTTP status available", url);
}
ERR_print_errors_fp(stderr);
}
/*
A timestamp request looks like this:
POST <someurl> HTTP/1.1
Content-Type: application/octet-stream
Content-Length: ...
Accept: application/octet-stream
User-Agent: Transport
Host: ...
Cache-Control: no-cache
<base64encoded blob>
.. and the blob has the following ASN1 structure:
0:d=0 hl=4 l= 291 cons: SEQUENCE
4:d=1 hl=2 l= 10 prim: OBJECT :1.3.6.1.4.1.311.3.2.1
16:d=1 hl=4 l= 275 cons: SEQUENCE
20:d=2 hl=2 l= 9 prim: OBJECT :pkcs7-data
31:d=2 hl=4 l= 260 cons: cont [ 0 ]
35:d=3 hl=4 l= 256 prim: OCTET STRING
<signature>
.. and it returns a base64 encoded PKCS#7 structure.
*/
static int add_timestamp(PKCS7 *sig, char *url, char *proxy, int rfc3161,
const EVP_MD *md, int verbose, int noverifypeer)
{
CURL *curl;
struct curl_slist *slist = NULL;
CURLcode c;
BIO *bout, *bin, *b64;
u_char *p = NULL;
int len = 0;
PKCS7_SIGNER_INFO *si =
sk_PKCS7_SIGNER_INFO_value
(sig->d.sign->signer_info, 0);
if (!url) return -1;
curl = curl_easy_init();
if (proxy) {
curl_easy_setopt(curl, CURLOPT_PROXY, proxy);
if (!strncmp("http:", proxy, 5))
curl_easy_setopt(curl, CURLOPT_PROXYTYPE, CURLPROXY_HTTP);
if (!strncmp("socks:", proxy, 6))
curl_easy_setopt(curl, CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5);
}
curl_easy_setopt(curl, CURLOPT_URL, url);
/* curl_easy_setopt(curl, CURLOPT_VERBOSE, 42); */
if (noverifypeer)
curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, FALSE);
if (rfc3161) {
slist = curl_slist_append(slist, "Content-Type: application/timestamp-query");
slist = curl_slist_append(slist, "Accept: application/timestamp-reply");
} else {
slist = curl_slist_append(slist, "Content-Type: application/octet-stream");
slist = curl_slist_append(slist, "Accept: application/octet-stream");
}
slist = curl_slist_append(slist, "User-Agent: Transport");
slist = curl_slist_append(slist, "Cache-Control: no-cache");
curl_easy_setopt(curl, CURLOPT_HTTPHEADER, slist);
if (rfc3161) {
unsigned char mdbuf[EVP_MAX_MD_SIZE];
EVP_MD_CTX *mdctx;
mdctx = EVP_MD_CTX_new();
EVP_DigestInit(mdctx, md);
EVP_DigestUpdate(mdctx, si->enc_digest->data, si->enc_digest->length);
EVP_DigestFinal(mdctx, mdbuf, NULL);
EVP_MD_CTX_free(mdctx);
TimeStampReq *req = TimeStampReq_new();
ASN1_INTEGER_set(req->version, 1);
req->messageImprint->digestAlgorithm->algorithm = OBJ_nid2obj(EVP_MD_nid(md));
req->messageImprint->digestAlgorithm->parameters = ASN1_TYPE_new();
req->messageImprint->digestAlgorithm->parameters->type = V_ASN1_NULL;
ASN1_OCTET_STRING_set(req->messageImprint->digest, mdbuf, EVP_MD_size(md));
req->certReq = (void*)0x1;
len = i2d_TimeStampReq(req, NULL);
p = OPENSSL_malloc(len);
len = i2d_TimeStampReq(req, &p);
p -= len;
TimeStampReq_free(req);
} else {
TimeStampRequest *req = TimeStampRequest_new();
req->type = OBJ_txt2obj(SPC_TIME_STAMP_REQUEST_OBJID, 1);
req->blob->type = OBJ_nid2obj(NID_pkcs7_data);
req->blob->signature = si->enc_digest;
len = i2d_TimeStampRequest(req, NULL);
p = OPENSSL_malloc(len);
len = i2d_TimeStampRequest(req, &p);
p -= len;
req->blob->signature = NULL;
TimeStampRequest_free(req);
}
bout = BIO_new(BIO_s_mem());
if (!rfc3161) {
b64 = BIO_new(BIO_f_base64());
bout = BIO_push(b64, bout);
}
BIO_write(bout, p, len);
(void)BIO_flush(bout);
OPENSSL_free(p);
p = NULL;
len = BIO_get_mem_data(bout, &p);
curl_easy_setopt(curl, CURLOPT_POSTFIELDSIZE, len);
curl_easy_setopt(curl, CURLOPT_POSTFIELDS, (char*)p);
bin = BIO_new(BIO_s_mem());
BIO_set_mem_eof_return(bin, 0);
curl_easy_setopt(curl, CURLOPT_POST, 1);
curl_easy_setopt(curl, CURLOPT_WRITEDATA, bin);
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, curl_write);
c = curl_easy_perform(curl);
curl_slist_free_all(slist);
BIO_free_all(bout);
if (c) {
BIO_free_all(bin);
if (verbose)
fprintf(stderr, "CURL failure: %s %s\n", curl_easy_strerror(c), url);
} else {
(void)BIO_flush(bin);
long http_code = -1;
curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &http_code);
/*
* At this point we could also look at the response body (and perhaps
* log it if we fail to decode the response):
*
* char *resp_body = NULL;
* long resp_body_len = BIO_get_mem_data(bin, &resp_body);
*/
if (rfc3161) {
TimeStampResp *reply;
(void)BIO_flush(bin);
reply = ASN1_item_d2i_bio(ASN1_ITEM_rptr(TimeStampResp), bin, NULL);
BIO_free_all(bin);
if (!reply) {
if (verbose)
print_timestamp_error(url, http_code);
return -1;
}
if (ASN1_INTEGER_get(reply->status->status) != 0) {
if (verbose)
fprintf(stderr, "Timestamping failed: %ld\n", ASN1_INTEGER_get(reply->status->status));
TimeStampResp_free(reply);
return -1;
}
if (((len = i2d_PKCS7(reply->token, NULL)) <= 0) ||
(p = OPENSSL_malloc(len)) == NULL) {
if (verbose) {
fprintf(stderr, "Failed to convert pkcs7: %d\n", len);
ERR_print_errors_fp(stderr);
}
TimeStampResp_free(reply);
return -1;
}
len = i2d_PKCS7(reply->token, &p);
p -= len;
TimeStampResp_free(reply);
STACK_OF(X509_ATTRIBUTE) *attrs = sk_X509_ATTRIBUTE_new_null();
attrs = X509at_add1_attr_by_txt
(&attrs, SPC_RFC3161_OBJID, V_ASN1_SET, p, len);
OPENSSL_free(p);
PKCS7_set_attributes(si, attrs);
sk_X509_ATTRIBUTE_pop_free(attrs, X509_ATTRIBUTE_free);
} else {
int i;
PKCS7 *p7;
PKCS7_SIGNER_INFO *info;
ASN1_STRING *astr;
BIO* b64_bin;
b64 = BIO_new(BIO_f_base64());
if (!blob_has_nl)
BIO_set_flags(b64, BIO_FLAGS_BASE64_NO_NL);
b64_bin = BIO_push(b64, bin);
p7 = d2i_PKCS7_bio(b64_bin, NULL);
if (p7 == NULL) {
BIO_free_all(b64_bin);
if (verbose)
print_timestamp_error(url, http_code);
return -1;
}
BIO_free_all(b64_bin);
for(i = sk_X509_num(p7->d.sign->cert)-1; i>=0; i--)
PKCS7_add_certificate(sig, sk_X509_value(p7->d.sign->cert, i));
info = sk_PKCS7_SIGNER_INFO_value(p7->d.sign->signer_info, 0);
if (((len = i2d_PKCS7_SIGNER_INFO(info, NULL)) <= 0) ||
(p = OPENSSL_malloc(len)) == NULL) {
if (verbose) {
fprintf(stderr, "Failed to convert signer info: %d\n", len);
ERR_print_errors_fp(stderr);
}
PKCS7_free(p7);
return -1;
}
len = i2d_PKCS7_SIGNER_INFO(info, &p);
p -= len;
astr = ASN1_STRING_new();
ASN1_STRING_set(astr, p, len);
OPENSSL_free(p);
PKCS7_add_attribute(si, NID_pkcs9_countersignature,
V_ASN1_SEQUENCE, astr);
PKCS7_free(p7);
}
}
curl_easy_cleanup(curl);
curl_global_cleanup();
return (int)c;
}
static int add_timestamp_authenticode(PKCS7 *sig, GLOBAL_OPTIONS *options)
{
int i;
for (i=0; i<options->nturl; i++) {
int res = add_timestamp(sig, options->turl[i], options->proxy, 0, NULL,
options->verbose || options->nturl == 1, options->noverifypeer);
if (!res) return 0;
}
return -1;
}
static int add_timestamp_rfc3161(PKCS7 *sig, GLOBAL_OPTIONS *options)
{
int i;
for (i=0; i<options->ntsurl; i++) {
int res = add_timestamp(sig, options->tsurl[i], options->proxy, 1, options->md,
options->verbose || options->ntsurl == 1, options->noverifypeer);
if (!res) return 0;
}
return -1;
}
#endif /* ENABLE_CURL */
#ifdef WITH_GSF
static int gsf_initialized = 0;
#endif /* WITH_GSF */
static void cleanup_lib_state(void)
{
#ifdef WITH_GSF
if (gsf_initialized)
gsf_shutdown();
#endif
OBJ_cleanup();
#ifndef OPENSSL_NO_ENGINE
ENGINE_cleanup();
#endif
EVP_cleanup();
CONF_modules_free();
CRYPTO_cleanup_all_ex_data();
ERR_free_strings();
}
static bool on_list(const char *txt, const char *list[])
{
while (*list)
if (!strcmp(txt, *list++))
return true;
return false;
}
static void usage(const char *argv0, const char *cmd)
{
printf("\nUsage: %s", argv0);
const char *cmds_all[] = {"all", NULL};
if (on_list(cmd, cmds_all)) {
printf("\n\n%1s[ --version | -v ]\n", "");
printf("%1s[ --help ]\n\n", "");
}
const char *cmds_sign[] = {"all", "sign", NULL};
if (on_list(cmd, cmds_sign)) {
printf("%1s[ sign ] ( -certs <certfile> -key <keyfile> | -pkcs12 <pkcs12file> |\n", "");
printf("%12s [ -pkcs11engine <engine> ] -pkcs11module <module> -certs <certfile> -key <pkcs11 key id>)\n", "");
printf("%12s[ -pass <password>", "");
#ifdef PROVIDE_ASKPASS
printf("%1s [ -askpass ]", "");
#endif
printf("%1s[ -readpass <file> ]\n", "");
printf("%12s[ -ac <crosscertfile> ]\n", "");
printf("%12s[ -h {md5,sha1,sha2(56),sha384,sha512} ]\n", "");
printf("%12s[ -n <desc> ] [ -i <url> ] [ -jp <level> ] [ -comm ]\n", "");
printf("%12s[ -ph ]\n", "");
#ifdef ENABLE_CURL
printf("%12s[ -t <timestampurl> [ -t ... ] [ -p <proxy> ] [ -noverifypeer ]\n", "");
printf("%12s[ -ts <timestampurl> [ -ts ... ] [ -p <proxy> ] [ -noverifypeer ] ]\n", "");
#endif /* ENABLE_CURL */
printf("%12s[ -st <unix-time> ]\n", "");
printf("%12s[ -addUnauthenticatedBlob ]\n", "");
printf("%12s[ -nest ]\n", "");
printf("%12s[ -verbose ]\n", "");
#ifdef WITH_GSF
printf("%12s[ -add-msi-dse ]\n", "");
#endif /* WITH_GSF */
printf("%12s[ -in ] <infile> [-out ] <outfile>\n\n", "");
}
const char *cmds_add[] = {"all", "add", NULL};
if (on_list(cmd, cmds_add)) {
printf("%1sadd [-addUnauthenticatedBlob]\n", "");
#ifdef ENABLE_CURL
printf("%12s[ -t <timestampurl> [ -t ... ] [ -p <proxy> ] [ -noverifypeer ]\n", "");
printf("%12s[ -ts <timestampurl> [ -ts ... ] [ -p <proxy> ] [ -noverifypeer ] ]\n", "");
#endif /* ENABLE_CURL */
printf("%12s[ -in ] <infile> [ -out ] <outfile>\n\n", "");
}
const char *cmds_attach[] = {"all", "attach-signature", NULL};
if (on_list(cmd, cmds_attach)) {
printf("%1sattach-signature [ -sigin ] <sigfile>\n", "");
printf("%12s[ -CAfile <infile> ]\n", "");
printf("%12s[ -CRLfile <infile> ]\n", "");
printf("%12s[ -untrusted <infile> ]\n", "");
printf("%12s[ -nest ]\n", "");
printf("%12s[ -in ] <infile> [ -out ] <outfile>\n\n", "");
}
const char *cmds_extract[] = {"all", "extract-signature", NULL};
if (on_list(cmd, cmds_extract)) {
printf("%1sextract-signature [ -pem ]\n", "");
printf("%12s[ -in ] <infile> [ -out ] <sigfile>\n\n", "");
}
const char *cmds_remove[] = {"all", "remove-signature", NULL};
if (on_list(cmd, cmds_remove))
printf("%1sremove-signature [ -in ] <infile> [ -out ] <outfile>\n\n", "");
const char *cmds_verify[] = {"all", "verify", NULL};
if (on_list(cmd, cmds_verify)) {
printf("%1sverify [ -in ] <infile>\n", "");
printf("%12s[ -CAfile <infile> ]\n", "");
printf("%12s[ -CRLfile <infile> ]\n", "");
printf("%12s[ -untrusted <infile> ]\n", "");
printf("%12s[ -require-leaf-hash {md5,sha1,sha2(56),sha384,sha512}:XXXXXXXXXXXX... ]\n", "");
printf("%12s[ -verbose ]\n\n", "");
}
cleanup_lib_state();
exit(-1);
}
static void help_for(const char *argv0, const char *cmd)
{
const char *cmds_all[] = {"all", NULL};
if (on_list(cmd, cmds_all)) {
printf("osslsigncode is a small tool that implements part of the functionality of the Microsoft\n");
printf("tool signtool.exe - more exactly the Authenticode signing and timestamping.\n");
printf("It can sign and timestamp PE (EXE/SYS/DLL/etc), CAB and MSI files,\n");
printf("supports getting the timestamp through a proxy as well.\n");
printf("osslsigncode also supports signature verification, removal and extraction.\n\n");
printf("%-22s = print osslsigncode version and usage\n", "--version | -v");
printf("%-22s = print osslsigncode help menu\n\n", "--help");
printf("Commands:\n");
printf("%-22s = add an unauthenticated blob or a timestamp to a previously-signed file\n", "add");
printf("%-22s = sign file using a given signature\n", "attach-signature");
printf("%-22s = extract signature from a previously-signed file\n", "extract-signature");
printf("%-22s = remove sections of the embedded signature on a file\n", "remove-signature");
printf("%-22s = digitally sign a file\n", "sign");
printf("%-22s = verifies the digital signature of a file\n\n", "verify");
printf("For help on a specific command, enter %s <command> --help\n", argv0);
}
const char *cmds_add[] = {"add", NULL};
if (on_list(cmd, cmds_add)) {
printf("\nUse the \"add\" command to add an unauthenticated blob or a timestamp to a previously-signed file.\n\n");
printf("Options:\n");
}
const char *cmds_attach[] = {"attach-signature", NULL};
if (on_list(cmd, cmds_attach)) {
printf("\nUse the \"attach-signature\" command to attach the signature stored in the \"sigin\" file.\n");
printf("In order to verify this signature you should specify how to find needed CA or TSA\n");
printf("certificates, if appropriate.\n\n");
printf("Options:\n");
}
const char *cmds_extract[] = {"extract-signature", NULL};
if (on_list(cmd, cmds_extract)) {
printf("\nUse the \"extract-signature\" command to extract the embedded signature from a previously-signed file.\n");
printf("DER is the default format of the output file, but can be changed to PEM.\n\n");
printf("Options:\n");
}
const char *cmds_remove[] = {"remove-signature", NULL};
if (on_list(cmd, cmds_remove)) {
printf("\nUse the \"remove-signature\" command to remove sections of the embedded signature on a file.\n\n");
printf("Options:\n");
}
const char *cmds_sign[] = {"sign", NULL};
if (on_list(cmd, cmds_sign)) {
printf("\nUse the \"sign\" command to sign files using embedded signatures.\n");
printf("Signing protects a file from tampering, and allows users to verify the signer\n");
printf("based on a signing certificate. The options below allow you to specify signing\n");
printf("parameters and to select the signing certificate you wish to use.\n\n");
printf("Options:\n");
}
const char *cmds_verify[] = {"verify", NULL};
if (on_list(cmd, cmds_verify)) {
printf("\nUse the \"verify\" command to verify embedded signatures.\n");
printf("Verification determines if the signing certificate was issued by a trusted party,\n");
printf("whether that certificate has been revoked, and whether the certificate is valid\n");
printf("under a specific policy. Options allow you to specify requirements that must be met\n");
printf("and to specify how to find needed CA or TSA certificates, if appropriate.\n\n");
printf("Options:\n");
}
const char *cmds_ac[] = {"sign", NULL};
if (on_list(cmd, cmds_ac))
printf("%-24s= an additional certificate to be added to the signature block\n", "-ac");
#ifdef WITH_GSF
const char *cmds_add_msi_dse[] = {"sign", NULL};
if (on_list(cmd, cmds_add_msi_dse))
printf("%-24s= sign a MSI file with the add-msi-dse option\n", "-add-msi-dse");
#endif /* WITH_GSF */
const char *cmds_addUnauthenticatedBlob[] = {"sign", "add", NULL};
if (on_list(cmd, cmds_addUnauthenticatedBlob))
printf("%-24s= add an unauthenticated blob to the PE/MSI file\n", "-addUnauthenticatedBlob");
#ifdef PROVIDE_ASKPASS
const char *cmds_askpass[] = {"sign", NULL};
if (on_list(cmd, cmds_askpass))
printf("%-24s= ask for the private key password\n", "-askpass");
#endif /* PROVIDE_ASKPASS */
const char *cmds_CAfile[] = {"attach-signature", "verify", NULL};
if (on_list(cmd, cmds_CAfile))
printf("%-24s= the file containing one or more trusted certificates in PEM format\n", "-CAfile");
const char *cmds_certs[] = {"sign", NULL};
if (on_list(cmd, cmds_certs))
printf("%-24s= the signing certificate to use\n", "-certs");
const char *cmds_comm[] = {"sign", NULL};
if (on_list(cmd, cmds_comm))
printf("%-24s= set commercial purpose (default: individual purpose)\n", "-comm");
const char *cmds_CRLfile[] = {"attach-signature", "verify", NULL};
if (on_list(cmd, cmds_CRLfile))
printf("%-24s= the file containing one or more CRLs in PEM format\n", "-CRLfile");
const char *cmds_h[] = {"sign", NULL};
if (on_list(cmd, cmds_h)) {
printf("%-24s= {md5|sha1|sha2(56)|sha384|sha512}\n", "-h");
printf("%26sset of cryptographic hash functions\n", "");
}
const char *cmds_i[] = {"sign", NULL};
if (on_list(cmd, cmds_i))
printf("%-24s= specifies a URL for expanded description of the signed content\n", "-i");
const char *cmds_in[] = {"add", "attach-signature", "extract-signature", "remove-signature", "sign", "verify", NULL};
if (on_list(cmd, cmds_in))
printf("%-24s= input file\n", "-in");
const char *cmds_jp[] = {"sign", NULL};
if (on_list(cmd, cmds_jp)) {
printf("%-24s= low | medium | high\n", "-jp");
printf("%26slevels of permissions in Microsoft Internet Explorer 4.x for CAB files\n", "");
printf("%26sonly \"low\" level is now supported\n", "");
}
const char *cmds_key[] = {"sign", NULL};
if (on_list(cmd, cmds_key))
printf("%-24s= the private key to use\n", "-key");
const char *cmds_n[] = {"sign", NULL};
if (on_list(cmd, cmds_n))
printf("%-24s= specifies a description of the signed content\n", "-n");
const char *cmds_nest[] = {"attach-signature", "sign", NULL};
if (on_list(cmd, cmds_nest))
printf("%-24s= add the new nested signature instead of replacing the first one\n", "-nest");
#ifdef ENABLE_CURL
const char *cmds_noverifypeer[] = {"add", "sign", NULL};
if (on_list(cmd, cmds_noverifypeer))
printf("%-24s= do not verify the Time-Stamp Authority's SSL certificate\n", "-noverifypeer");
#endif /* ENABLE_CURL */
const char *cmds_out[] = {"add", "attach-signature", "extract-signature", "remove-signature", "sign", NULL};
if (on_list(cmd, cmds_out))
printf("%-24s= output file\n", "-out");
#ifdef ENABLE_CURL
const char *cmds_p[] = {"add", "sign", NULL};
if (on_list(cmd, cmds_p))
printf("%-24s= proxy to connect to the desired Time-Stamp Authority server\n", "-p");
#endif /* ENABLE_CURL */
const char *cmds_pass[] = {"sign", NULL};
if (on_list(cmd, cmds_pass))
printf("%-24s= the private key password\n", "-pass");
const char *cmds_pem[] = {"extract-signature", NULL};
if (on_list(cmd, cmds_pem))
printf("%-24s= output data format PEM to use (default: DER)\n", "-pem");
const char *cmds_ph[] = {"sign", NULL};
if (on_list(cmd, cmds_ph))
printf("%-24s= generate page hashes for executable files\n", "-ph");
const char *cmds_pkcs11engine[] = {"sign", NULL};
if (on_list(cmd, cmds_pkcs11engine))
printf("%-24s= PKCS11 engine\n", "-pkcs11engine");
const char *cmds_pkcs11module[] = {"sign", NULL};
if (on_list(cmd, cmds_pkcs11module))
printf("%-24s= PKCS11 module\n", "-pkcs11module");
const char *cmds_pkcs12[] = {"sign", NULL};
if (on_list(cmd, cmds_pkcs12))
printf("%-24s= PKCS#12 container with the certificate and the private key\n", "-pkcs12");
const char *cmds_readpass[] = {"sign", NULL};
if (on_list(cmd, cmds_readpass))
printf("%-24s= the private key password source\n", "-readpass");
const char *cmds_require_leaf_hash[] = {"verify", NULL};
if (on_list(cmd, cmds_require_leaf_hash)) {
printf("%-24s= {md5|sha1|sha2(56)|sha384|sha512}:XXXXXXXXXXXX...\n", "-require-leaf-hash");
printf("%26sspecifies an optional hash algorithm to use when computing\n", "");
printf("%26sthe leaf certificate (in DER form) hash and compares\n", "");
printf("%26sthe provided hash against the computed hash\n", "");
}
const char *cmds_sigin[] = {"attach-signature", NULL};
if (on_list(cmd, cmds_sigin))
printf("%-24s= a file containing the signature to be attached\n", "-sigin");
const char *cmds_st[] = {"sign", NULL};
if (on_list(cmd, cmds_st))
printf("%-24s= the unix-time to set the signing time\n", "-st");
#ifdef ENABLE_CURL
const char *cmds_t[] = {"add", "sign", NULL};
if (on_list(cmd, cmds_t)) {
printf("%-24s= specifies that the digital signature will be timestamped\n", "-t");
printf("%26sby the Time-Stamp Authority (TSA) indicated by the URL\n", "");
printf("%26sthis option cannot be used with the -ts option\n", "");
}
const char *cmds_ts[] = {"add", "sign", NULL};
if (on_list(cmd, cmds_ts)) {
printf("%-24s= specifies the URL of the RFC 3161 Time-Stamp Authority server\n", "-ts");
printf("%26sthis option cannot be used with the -t option\n", "");
}
#endif /* ENABLE_CURL */
const char *cmds_untrusted[] = {"attach-signature", "verify", NULL};
if (on_list(cmd, cmds_untrusted)) {
printf("%-24s= set of additional untrusted certificates which may be needed\n", "-untrusted");
printf("%26sthe file should contain one or more certificates in PEM format\n", "");
}
const char *cmds_verbose[] = {"sign", "verify", NULL};
if (on_list(cmd, cmds_verbose)) {
printf("%-24s= include additional output in the log\n", "-verbose");
}
usage(argv0, cmd);
}
#define DO_EXIT_0(x) { fprintf(stderr, x); goto err_cleanup; }
#define DO_EXIT_1(x, y) { fprintf(stderr, x, y); goto err_cleanup; }
#define DO_EXIT_2(x, y, z) { fprintf(stderr, x, y, z); goto err_cleanup; }
#define GET_UINT8_LE(p) ((u_char*)(p))[0]
#define GET_UINT16_LE(p) (((u_char*)(p))[0] | (((u_char*)(p))[1]<<8))
#define GET_UINT32_LE(p) (((u_char*)(p))[0] | (((u_char*)(p))[1]<<8) | \
(((u_char*)(p))[2]<<16) | (((u_char*)(p))[3]<<24))
#define PUT_UINT16_LE(i,p) \
((u_char*)(p))[0] = (i) & 0xff; \
((u_char*)(p))[1] = ((i)>>8) & 0xff
#define PUT_UINT32_LE(i,p) \
((u_char*)(p))[0] = (i) & 0xff; \
((u_char*)(p))[1] = ((i)>>8) & 0xff; \
((u_char*)(p))[2] = ((i)>>16) & 0xff; \
((u_char*)(p))[3] = ((i)>>24) & 0xff
typedef enum {
FILE_TYPE_CAB,
FILE_TYPE_PE,
FILE_TYPE_MSI,
} file_type_t;
typedef enum {
CMD_SIGN,
CMD_EXTRACT,
CMD_REMOVE,
CMD_VERIFY,
CMD_ADD,
CMD_ATTACH,
} cmd_type_t;
static SpcLink *get_obsolete_link(void)
{
static const unsigned char obsolete[] = {
0x00, 0x3c, 0x00, 0x3c, 0x00, 0x3c, 0x00, 0x4f, 0x00, 0x62,
0x00, 0x73, 0x00, 0x6f, 0x00, 0x6c, 0x00, 0x65, 0x00, 0x74,
0x00, 0x65, 0x00, 0x3e, 0x00, 0x3e, 0x00, 0x3e
};
SpcLink *link = SpcLink_new();
link->type = 2;
link->value.file = SpcString_new();
link->value.file->type = 0;
link->value.file->value.unicode = ASN1_BMPSTRING_new();
ASN1_STRING_set(link->value.file->value.unicode, obsolete, sizeof(obsolete));
return link;
}
static const unsigned char classid_page_hash[] = {
0xA6, 0xB5, 0x86, 0xD5, 0xB4, 0xA1, 0x24, 0x66,
0xAE, 0x05, 0xA2, 0x17, 0xDA, 0x8E, 0x60, 0xD6
};
static unsigned char *pe_calc_page_hash(char *indata, size_t header_size,
int pe32plus, size_t sigpos, int phtype, size_t *rphlen)
{
unsigned short nsections = GET_UINT16_LE(indata + header_size + 6);
size_t pagesize = GET_UINT32_LE(indata + header_size + 56);
size_t hdrsize = GET_UINT32_LE(indata + header_size + 84);
const EVP_MD *md = EVP_get_digestbynid(phtype);
int pphlen = 4 + EVP_MD_size(md);
int phlen = pphlen * (3 + nsections + sigpos / pagesize);
unsigned char *res = OPENSSL_malloc(phlen);
unsigned char *zeroes = OPENSSL_zalloc(pagesize);
EVP_MD_CTX *mdctx;
mdctx = EVP_MD_CTX_new();
EVP_DigestInit(mdctx, md);
EVP_DigestUpdate(mdctx, indata, header_size + 88);
EVP_DigestUpdate(mdctx, indata + header_size + 92, 60 + pe32plus*16);
EVP_DigestUpdate(mdctx, indata + header_size + 160 + pe32plus*16, hdrsize - (header_size + 160 + pe32plus*16));
EVP_DigestUpdate(mdctx, zeroes, pagesize - hdrsize);
memset(res, 0, 4);
EVP_DigestFinal(mdctx, res + 4, NULL);
unsigned short sizeofopthdr = GET_UINT16_LE(indata + header_size + 20);
char *sections = indata + header_size + 24 + sizeofopthdr;
int i, pi = 1;
size_t lastpos = 0;
for (i=0; i<nsections; i++) {
size_t rs = GET_UINT32_LE(sections + 16);
size_t ro = GET_UINT32_LE(sections + 20);
size_t l;
for (l=0; l < rs; l+=pagesize, pi++) {
PUT_UINT32_LE(ro + l, res + pi*pphlen);
EVP_DigestInit(mdctx, md);
if (rs - l < pagesize) {
EVP_DigestUpdate(mdctx, indata + ro + l, rs - l);
EVP_DigestUpdate(mdctx, zeroes, pagesize - (rs - l));
} else {
EVP_DigestUpdate(mdctx, indata + ro + l, pagesize);
}
EVP_DigestFinal(mdctx, res + pi*pphlen + 4, NULL);
}
lastpos = ro + rs;
sections += 40;
}
EVP_MD_CTX_free(mdctx);
PUT_UINT32_LE(lastpos, res + pi*pphlen);
memset(res + pi*pphlen + 4, 0, EVP_MD_size(md));
pi++;
OPENSSL_free(zeroes);
*rphlen = pi*pphlen;
return res;
}
static SpcLink *get_page_hash_link(int phtype, char *indata, FILE_HEADER *header)
{
unsigned char *ph, *p, *tmp;
size_t l, phlen;
char hexbuf[EVP_MAX_MD_SIZE*2+1];
ASN1_TYPE *tostr;
SpcAttributeTypeAndOptionalValue *aval;
ASN1_TYPE *taval;
SpcSerializedObject *so;
SpcLink *link;
ph = pe_calc_page_hash(indata, header->header_size, header->pe32plus, header->fileend, phtype, &phlen);
if (!ph) {
fprintf(stderr, "Failed to calculate page hash\n");
exit(-1);
}
tohex(ph, hexbuf, (phlen < 32) ? phlen : 32);
printf("Calculated page hash : %s ...\n", hexbuf);
tostr = ASN1_TYPE_new();
tostr->type = V_ASN1_OCTET_STRING;
tostr->value.octet_string = ASN1_OCTET_STRING_new();
ASN1_OCTET_STRING_set(tostr->value.octet_string, ph, phlen);
OPENSSL_free(ph);
STACK_OF(ASN1_TYPE) *oset = sk_ASN1_TYPE_new_null();
sk_ASN1_TYPE_push(oset, tostr);
l = i2d_ASN1_SET_ANY(oset, NULL);
tmp = p = OPENSSL_malloc(l);
i2d_ASN1_SET_ANY(oset, &tmp);
ASN1_TYPE_free(tostr);
sk_ASN1_TYPE_free(oset);
aval = SpcAttributeTypeAndOptionalValue_new();
aval->type = OBJ_txt2obj((phtype == NID_sha1) ? SPC_PE_IMAGE_PAGE_HASHES_V1 : SPC_PE_IMAGE_PAGE_HASHES_V2, 1);
aval->value = ASN1_TYPE_new();
aval->value->type = V_ASN1_SET;
aval->value->value.set = ASN1_STRING_new();
ASN1_STRING_set(aval->value->value.set, p, l);
OPENSSL_free(p);
l = i2d_SpcAttributeTypeAndOptionalValue(aval, NULL);
tmp = p = OPENSSL_malloc(l);
i2d_SpcAttributeTypeAndOptionalValue(aval, &tmp);
SpcAttributeTypeAndOptionalValue_free(aval);
taval = ASN1_TYPE_new();
taval->type = V_ASN1_SEQUENCE;
taval->value.sequence = ASN1_STRING_new();
ASN1_STRING_set(taval->value.sequence, p, l);
OPENSSL_free(p);
STACK_OF(ASN1_TYPE) *aset = sk_ASN1_TYPE_new_null();
sk_ASN1_TYPE_push(aset, taval);
l = i2d_ASN1_SET_ANY(aset, NULL);
tmp = p = OPENSSL_malloc(l);
l = i2d_ASN1_SET_ANY(aset, &tmp);
ASN1_TYPE_free(taval);
sk_ASN1_TYPE_free(aset);
so = SpcSerializedObject_new();
ASN1_OCTET_STRING_set(so->classId, classid_page_hash, sizeof(classid_page_hash));
ASN1_OCTET_STRING_set(so->serializedData, p, l);
OPENSSL_free(p);
link = SpcLink_new();
link->type = 1;
link->value.moniker = so;
return link;
}
static void get_indirect_data_blob(u_char **blob, int *len, GLOBAL_OPTIONS *options,
FILE_HEADER *header, file_type_t type, char *indata)
{
u_char *p;
int hashlen, l, phtype;
void *hash;
ASN1_OBJECT *dtype;
SpcIndirectDataContent *idc;
SpcLink *link;
SpcPeImageData *pid;
SpcSipInfo *si;
static const unsigned char msistr[] = {
0xf1, 0x10, 0x0c, 0x00, 0x00, 0x00, 0x00, 0x00,
0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x46
};
idc = SpcIndirectDataContent_new();
idc->data->value = ASN1_TYPE_new();
idc->data->value->type = V_ASN1_SEQUENCE;
idc->data->value->value.sequence = ASN1_STRING_new();
if (type == FILE_TYPE_CAB) {
link = get_obsolete_link();
l = i2d_SpcLink(link, NULL);
p = OPENSSL_malloc(l);
i2d_SpcLink(link, &p);
p -= l;
dtype = OBJ_txt2obj(SPC_CAB_DATA_OBJID, 1);
SpcLink_free(link);
} else if (type == FILE_TYPE_PE) {
pid = SpcPeImageData_new();
ASN1_BIT_STRING_set(pid->flags, (unsigned char*)"0", 0);
if (options->pagehash) {
phtype = NID_sha1;
if (EVP_MD_size(options->md) > EVP_MD_size(EVP_sha1()))
phtype = NID_sha256;
pid->file = get_page_hash_link(phtype, indata, header);
} else {
pid->file = get_obsolete_link();
}
l = i2d_SpcPeImageData(pid, NULL);
p = OPENSSL_malloc(l);
i2d_SpcPeImageData(pid, &p);
p -= l;
dtype = OBJ_txt2obj(SPC_PE_IMAGE_DATA_OBJID, 1);
SpcPeImageData_free(pid);
} else if (type == FILE_TYPE_MSI) {
si = SpcSipInfo_new();
ASN1_INTEGER_set(si->a, 1);
ASN1_INTEGER_set(si->b, 0);
ASN1_INTEGER_set(si->c, 0);
ASN1_INTEGER_set(si->d, 0);
ASN1_INTEGER_set(si->e, 0);
ASN1_INTEGER_set(si->f, 0);
ASN1_OCTET_STRING_set(si->string, msistr, sizeof(msistr));
l = i2d_SpcSipInfo(si, NULL);
p = OPENSSL_malloc(l);
i2d_SpcSipInfo(si, &p);
p -= l;
dtype = OBJ_txt2obj(SPC_SIPINFO_OBJID, 1);
SpcSipInfo_free(si);
} else {
fprintf(stderr, "Unexpected file type: %d\n", type);
exit(1);
}
idc->data->type = dtype;
idc->data->value->value.sequence->data = p;
idc->data->value->value.sequence->length = l;
idc->messageDigest->digestAlgorithm->algorithm = OBJ_nid2obj(EVP_MD_nid(options->md));
idc->messageDigest->digestAlgorithm->parameters = ASN1_TYPE_new();
idc->messageDigest->digestAlgorithm->parameters->type = V_ASN1_NULL;
hashlen = EVP_MD_size(options->md);
hash = OPENSSL_malloc(hashlen);
memset(hash, 0, hashlen);
ASN1_OCTET_STRING_set(idc->messageDigest->digest, hash, hashlen);
OPENSSL_free(hash);
*len = i2d_SpcIndirectDataContent(idc, NULL);
*blob = OPENSSL_malloc(*len);
p = *blob;
i2d_SpcIndirectDataContent(idc, &p);
SpcIndirectDataContent_free(idc);
*len -= EVP_MD_size(options->md);
}
static int set_signing_blob(PKCS7 *sig, BIO *hash, char *buf, int len)
{
unsigned char mdbuf[EVP_MAX_MD_SIZE];
int mdlen;
size_t seqhdrlen;
BIO *sigbio;
PKCS7 *td7;
mdlen = BIO_gets(hash, (char*)mdbuf, EVP_MAX_MD_SIZE);
memcpy(buf+len, mdbuf, mdlen);
seqhdrlen = asn1_simple_hdr_len((unsigned char*)buf, len);
if ((sigbio = PKCS7_dataInit(sig, NULL)) == NULL) {
fprintf(stderr, "PKCS7_dataInit failed\n");
return 0; /* FAILED */
}
BIO_write(sigbio, buf+seqhdrlen, len-seqhdrlen+mdlen);
(void)BIO_flush(sigbio);
if (!PKCS7_dataFinal(sig, sigbio)) {
fprintf(stderr, "PKCS7_dataFinal failed\n");
return 0; /* FAILED */
}
BIO_free_all(sigbio);
/*
replace the data part with the MS Authenticode
spcIndirectDataContext blob
*/
td7 = PKCS7_new();
td7->type = OBJ_txt2obj(SPC_INDIRECT_DATA_OBJID, 1);
td7->d.other = ASN1_TYPE_new();
td7->d.other->type = V_ASN1_SEQUENCE;
td7->d.other->value.sequence = ASN1_STRING_new();
ASN1_STRING_set(td7->d.other->value.sequence, buf, len+mdlen);
if (!PKCS7_set_content(sig, td7)) {
PKCS7_free(td7);
fprintf(stderr, "PKCS7_set_content failed\n");
return 0; /* FAILED */
}
return 1; /* OK */
}
static int set_indirect_data_blob(PKCS7 *sig, BIO *hash, file_type_t type,
char *indata, GLOBAL_OPTIONS *options, FILE_HEADER *header)
{
static char buf[64*1024];
u_char *p = NULL;
int len = 0;
get_indirect_data_blob(&p, &len, options, header, type, indata);
memcpy(buf, p, len);
OPENSSL_free(p);
if (!set_signing_blob(sig, hash, buf, len))
return 0; /* FAILED */
return 1; /* OK */
}
static unsigned int pe_calc_checksum(BIO *bio, FILE_HEADER *header)
{
unsigned int checkSum = 0;
unsigned short val;
size_t size = 0;
unsigned short *buf;
int nread;
/* recalculate the checksum */
buf = OPENSSL_malloc(sizeof(unsigned short)*32768);
(void)BIO_seek(bio, 0);
while ((nread = BIO_read(bio, buf, sizeof(unsigned short)*32768)) > 0) {
int i;
for (i = 0; i < nread / 2; i++) {
val = buf[i];
if (size == header->header_size + 88 || size == header->header_size + 90)
val = 0;
checkSum += val;
checkSum = 0xffff & (checkSum + (checkSum >> 0x10));
size += 2;
}
}
OPENSSL_free(buf);
checkSum = 0xffff & (checkSum + (checkSum >> 0x10));
checkSum += size;
return checkSum;
}
static void pe_recalc_checksum(BIO *bio, FILE_HEADER *header)
{
unsigned int checkSum = pe_calc_checksum(bio, header);
char buf[4];
/* write back checksum */
(void)BIO_seek(bio, header->header_size + 88);
PUT_UINT32_LE(checkSum, buf);
BIO_write(bio, buf, 4);
}
static int verify_leaf_hash(X509 *leaf, const char *leafhash)
{
int ret = 0;
unsigned char *mdbuf = NULL;
/* decode the provided hash */
char *mdid = OPENSSL_strdup(leafhash);
char *hash = strchr(mdid, ':');
if (hash == NULL) {
printf("Unable to parse -require-leaf-hash parameter: %s\n", leafhash);
ret = 1;
goto out;
}
*hash++ = '\0';
const EVP_MD *md = EVP_get_digestbyname(mdid);
if (md == NULL) {
printf("Unable to lookup digest by name '%s'\n", mdid);
ret = 1;
goto out;
}
long mdlen = 0;
mdbuf = OPENSSL_hexstr2buf(hash, &mdlen);
if (mdlen != EVP_MD_size(md)) {
printf("Hash length mismatch: '%s' digest must be %d bytes long (got %ld bytes)\n",
mdid, EVP_MD_size(md), mdlen);
ret = 1;
goto out;
}
/* compute the leaf certificate hash */
EVP_MD_CTX *ctx = EVP_MD_CTX_create();
EVP_DigestInit_ex(ctx, md, NULL);
size_t certlen = i2d_X509(leaf, NULL);
unsigned char *certbuf = OPENSSL_malloc(certlen);
unsigned char *tmp = certbuf;
i2d_X509(leaf, &tmp);
EVP_DigestUpdate(ctx, certbuf, certlen);
OPENSSL_free(certbuf);
unsigned char cmdbuf[EVP_MAX_MD_SIZE];
EVP_DigestFinal_ex(ctx, cmdbuf, NULL);
EVP_MD_CTX_destroy(ctx);
/* compare the provided hash against the computed hash */
if (memcmp(mdbuf, cmdbuf, EVP_MD_size(md))) {
char hexbuf[EVP_MAX_MD_SIZE*2+1];
tohex(cmdbuf, hexbuf, EVP_MD_size(md));
printf("Hash value mismatch: %s computed\n", hexbuf);
ret = 1;
goto out;
}
out:
OPENSSL_free(mdid);
OPENSSL_free(mdbuf);
return ret;
}
static int print_time(const ASN1_TIME *time)
{
BIO *bp;
if ((time == NULL) || (!ASN1_TIME_check(time))) {
printf("N/A\n");
return 0; /* FAILED */
}
bp = BIO_new_fp(stdout, BIO_NOCLOSE);
ASN1_TIME_print(bp, time);
BIO_free(bp);
printf("\n");
return 1; /* OK */
}
static int print_cert(X509 *cert, int i)
{
char *subject, *issuer, *serial;
BIGNUM *serialbn;
subject = X509_NAME_oneline(X509_get_subject_name(cert), NULL, 0);
issuer = X509_NAME_oneline(X509_get_issuer_name(cert), NULL, 0);
serialbn = ASN1_INTEGER_to_BN(X509_get_serialNumber(cert), NULL);
serial = BN_bn2hex(serialbn);
if (i > 0)
printf("\t------------------\n");
printf("\tSigner #%d:\n\t\tSubject: %s\n\t\tIssuer : %s\n\t\tSerial : %s\n\t\tCertificate expiration date:\n",
i, subject, issuer, serial);
printf("\t\t\tnotBefore : ");
print_time(X509_getm_notBefore(cert));
printf("\t\t\tnotAfter : ");
print_time(X509_getm_notAfter(cert));
OPENSSL_free(subject);
OPENSSL_free(issuer);
return 1; /* OK */
}
static int find_signer(PKCS7 *p7, char *leafhash, int *leafok)
{
STACK_OF(X509) *signers;
X509 *cert;
/*
* retrieve the signer's certificate from p7,
* search only internal certificates if it was requested
*/
signers = PKCS7_get0_signers(p7, NULL, 0);
if (!signers || sk_X509_num(signers) != 1)
return 0; /* FAILED */
printf("Signer's certificate:\n");
cert = sk_X509_value(signers, 0);
if ((cert == NULL) || (!print_cert(cert, 0)))
return 0; /* FAILED */
if (leafhash != NULL && *leafok == 0) {
*leafok = verify_leaf_hash(cert, leafhash) == 0;
}
sk_X509_free(signers);
return 1; /* OK */
}
static int print_certs(PKCS7 *p7)
{
X509 *cert;
int i, count;
count = sk_X509_num(p7->d.sign->cert);
printf("\nNumber of certificates: %d\n", count);
for (i=0; i<count; i++) {
cert = sk_X509_value(p7->d.sign->cert, i);
if ((cert == NULL) || (!print_cert(cert, i)))
return 0; /* FAILED */
}
return 1; /* OK */
}
static ASN1_UTCTIME *get_signing_time(PKCS7_SIGNER_INFO *si)
{
STACK_OF(X509_ATTRIBUTE) *auth_attr;
X509_ATTRIBUTE *attr;
ASN1_OBJECT *object;
ASN1_UTCTIME *time = NULL;
char object_txt[128];
int i;
auth_attr = PKCS7_get_signed_attributes(si); /* cont[0] */
if (auth_attr)
for (i=0; i<X509at_get_attr_count(auth_attr); i++) {
attr = X509at_get_attr(auth_attr, i);
if (attr == NULL)
return NULL; /* FAILED */
object = X509_ATTRIBUTE_get0_object(attr);
if (object == NULL)
return NULL; /* FAILED */
object_txt[0] = 0x00;
OBJ_obj2txt(object_txt, sizeof(object_txt), object, 1);
if (!strcmp(object_txt, SPC_TIMESTAMP_SIGNING_TIME_OBJID)) {
/* "1.2.840.113549.1.9.5" */
time = X509_ATTRIBUTE_get0_data(attr, 0, V_ASN1_UTCTIME, NULL);
}
}
return time;
}
static int load_crlfile_lookup(X509_STORE *store, char *crl)
{
X509_LOOKUP *lookup;
X509_VERIFY_PARAM *param;
lookup = X509_STORE_add_lookup(store, X509_LOOKUP_file());
if (!lookup)
return 0; /* FAILED */
if (!X509_load_crl_file(lookup, crl, X509_FILETYPE_PEM)) {
fprintf(stderr, "Error: no CRL found in %s\n", crl);
return 0; /* FAILED */
}
param = X509_STORE_get0_param(store);
if (param == NULL)
return 0; /* FAILED */
if (!X509_VERIFY_PARAM_set_flags(param, X509_V_FLAG_CRL_CHECK))
return 0; /* FAILED */
if (!X509_VERIFY_PARAM_set_purpose(param, X509_PURPOSE_CRL_SIGN))
return 0; /* FAILED */
if (!X509_STORE_set1_param(store, param))
return 0; /* FAILED */
return 1; /* OK */
}
static int load_file_lookup(X509_STORE *store, char *certs, int purpose)
{
X509_LOOKUP *lookup;
X509_VERIFY_PARAM *param;
lookup = X509_STORE_add_lookup(store, X509_LOOKUP_file());
if (!lookup)
return 0; /* FAILED */
if (!X509_load_cert_file(lookup, certs, X509_FILETYPE_PEM)) {
fprintf(stderr, "Error: no certificate found in %s\n", certs);
return 0; /* FAILED */
}
param = X509_STORE_get0_param(store);
if (param == NULL)
return 0; /* FAILED */
if (!X509_VERIFY_PARAM_set_purpose(param, purpose))
return 0; /* FAILED */
if (!X509_STORE_set1_param(store, param))
return 0; /* FAILED */
return 1; /* OK */
}
static int set_store_time(X509_STORE *store, time_t time)
{
X509_VERIFY_PARAM *param;
param = X509_VERIFY_PARAM_new();
if (param == NULL)
return 0; /* FAILED */
X509_VERIFY_PARAM_set_time(param, time);
if (!X509_STORE_set1_param(store, param)) {
X509_VERIFY_PARAM_free(param);
return 0; /* FAILED */
}
X509_VERIFY_PARAM_free(param);
return 1; /* OK */
}
static ASN1_UTCTIME *print_timestamp(PKCS7_SIGNER_INFO *si)
{
ASN1_INTEGER *version;
ASN1_UTCTIME *timestamp_time = NULL;
int md_nid;
char *issuer, *serial;
version = si->version;
md_nid = OBJ_obj2nid(si->digest_alg->algorithm);
printf("Version: %ld\nHash Algorithm: %s\n",
ASN1_INTEGER_get(version), (md_nid == NID_undef) ? "UNKNOWN" : OBJ_nid2ln(md_nid));
printf("The signature is timestamped: ");
timestamp_time = get_signing_time(si);
print_time(timestamp_time);
issuer = X509_NAME_oneline(si->issuer_and_serial->issuer, NULL, 0);
serial = BN_bn2hex(ASN1_INTEGER_to_BN(si->issuer_and_serial->serial, NULL));
printf("Timestamp Verified by:\n\t\tIssuer : %s\n\t\tSerial : %s\n", issuer, serial);
return timestamp_time; /* OK */
}
static PKCS7 *find_countersignature(PKCS7_SIGNED *p7_signed, const unsigned char *data, int length, ASN1_UTCTIME **timestamp_time)
{
PKCS7_SIGNER_INFO *si, *countersignature;
PKCS7 *p7 = NULL;
PKCS7 *content = NULL;
int i;
si = sk_PKCS7_SIGNER_INFO_value(p7_signed->signer_info, 0);
if (si == NULL)
return NULL; /* FAILED */
/* Create new signed PKCS7 timestamp structure. */
p7 = PKCS7_new();
if (!PKCS7_set_type(p7, NID_pkcs7_signed)) {
PKCS7_free(p7);
return NULL; /* FAILED */
}
countersignature = d2i_PKCS7_SIGNER_INFO(NULL, &data, length);
if (countersignature == NULL) {
PKCS7_free(p7);
return NULL; /* FAILED */
}
if (!PKCS7_add_signer(p7, countersignature)) {
PKCS7_free(p7);
return NULL; /* FAILED */
}
for (i = 0; i < sk_X509_num(p7_signed->cert); i++)
if (!PKCS7_add_certificate(p7, sk_X509_value(p7_signed->cert, i))) {
PKCS7_free(p7);
return NULL; /* FAILED */
}
/* Create new encapsulated NID_id_smime_ct_TSTInfo content. */
content = PKCS7_new();
content->d.other = ASN1_TYPE_new();
content->type = OBJ_nid2obj(NID_id_smime_ct_TSTInfo);
ASN1_TYPE_set1(content->d.other, V_ASN1_OCTET_STRING, si->enc_digest);
/* Add encapsulated content to signed PKCS7 timestamp structure:
p7->d.sign->contents = content */
if (!PKCS7_set_content(p7, content)) {
PKCS7_free(p7);
PKCS7_free(content);
return NULL; /* FAILED */
}
*timestamp_time = print_timestamp(countersignature);
return p7; /* OK */
}
static PKCS7 *find_rfc3161(const unsigned char *data, int length, ASN1_UTCTIME **timestamp_time)
{
PKCS7 *p7;
PKCS7_SIGNER_INFO *si;
p7 = d2i_PKCS7(NULL, &data, length);
if (p7 == NULL)
return NULL; /* FAILED */
si = sk_PKCS7_SIGNER_INFO_value(p7->d.sign->signer_info, 0);
if (si == NULL)
return NULL; /* FAILED */
*timestamp_time = print_timestamp(si);
return p7; /* OK */
}
static int pkcs7_print_attributes(PKCS7_SIGNED *p7_signed, PKCS7 **tmstamp_p7,
ASN1_UTCTIME **timestamp_time, int verbose)
{
PKCS7_SIGNER_INFO *si;
STACK_OF(X509_ATTRIBUTE) *unauth_attr;
X509_ATTRIBUTE *attr;
ASN1_OBJECT *object;
ASN1_STRING *value;
char object_txt[128];
int i;
si = sk_PKCS7_SIGNER_INFO_value(p7_signed->signer_info, 0);
if (si == NULL)
return 0; /* FAILED */
printf("\nSigning Time: ");
print_time(get_signing_time(si));
unauth_attr = PKCS7_get_attributes(si); /* cont[1] */
if (unauth_attr)
for (i=0; i<X509at_get_attr_count(unauth_attr); i++) {
attr = X509at_get_attr(unauth_attr, i);
if (attr == NULL)
return 0; /* FAILED */
object = X509_ATTRIBUTE_get0_object(attr);
if (object == NULL)
return 0; /* FAILED */
object_txt[0] = 0x00;
OBJ_obj2txt(object_txt, sizeof(object_txt), object, 1);
if (!strcmp(object_txt, SPC_AUTHENTICODE_COUNTER_SIGNATURE_OBJID)) {
/* 1.2.840.113549.1.9.6 */
printf("\nAuthenticode Timestamp\nPolicy OID: %s\n", object_txt);
value = X509_ATTRIBUTE_get0_data(attr, 0, V_ASN1_SEQUENCE, NULL);
if (value == NULL)
return 0; /* FAILED */
*tmstamp_p7 = find_countersignature(p7_signed, value->data, value->length, timestamp_time);
if (tmstamp_p7 == NULL)
return 0; /* FAILED */
} else if (!strcmp(object_txt, SPC_RFC3161_OBJID)) {
/* 1.3.6.1.4.1.311.3.3.1 */
printf("\nRFC3161 Timestamp\nPolicy OID: %s\n", object_txt);
value = X509_ATTRIBUTE_get0_data(attr, 0, V_ASN1_SEQUENCE, NULL);
if (value == NULL)
return 0; /* FAILED */
*tmstamp_p7 = find_rfc3161(value->data, value->length, timestamp_time);
if (tmstamp_p7 == NULL)
return 0; /* FAILED */
} else if (!strcmp(object_txt, SPC_UNAUTHENTICATED_DATA_BLOB_OBJID)) {
/* 1.3.6.1.4.1.42921.1.2.1 */
printf("\nUnauthenticated Data Blob\nPolicy OID: %s\n", object_txt);
value = X509_ATTRIBUTE_get0_data(attr, 0, V_ASN1_UTF8STRING, NULL);
if (value == NULL)
return 0; /* FAILED */
if (verbose)
printf("Data Blob: %s\n", OPENSSL_buf2hexstr(value->data, value->length));
printf("Data Blob length: %d bytes\n", value->length);
} else if (!strcmp(object_txt, SPC_NESTED_SIGNATURE_OBJID)) {
/* 1.3.6.1.4.1.311.2.4.1 */
printf("\nNested Signature\nPolicy OID: %s\n", object_txt);
} else
printf("\nPolicy OID: %s\n", object_txt);
}
/* else there is no unauthorized attribute */
return 1; /* OK */
}
/*
* compare the hash provided from the TSTInfo object against the hash computed
* from the signature created by the signing certificate's private key
*/
static int TST_verify(PKCS7 *tmstamp_p7, PKCS7_SIGNER_INFO *si)
{
ASN1_OCTET_STRING *object, *hash;
TimeStampToken *token;
const unsigned char *p = NULL;
unsigned char mdbuf[EVP_MAX_MD_SIZE];
char hexbuf[EVP_MAX_MD_SIZE*2+1];
const EVP_MD *md;
EVP_MD_CTX *mdctx;
int md_nid;
/* get id_smime_ct_TSTInfo object for RFC3161 Timestamp */
object = tmstamp_p7->d.sign->contents->d.other->value.octet_string;
p = object->data;
token = d2i_TimeStampToken(NULL, &p, object->length);
if (token) {
/* compute a hash from the encrypted message digest value of the file */
md_nid = OBJ_obj2nid(token->messageImprint->digestAlgorithm->algorithm);
md = EVP_get_digestbynid(md_nid);
mdctx = EVP_MD_CTX_new();
EVP_DigestInit(mdctx, md);
EVP_DigestUpdate(mdctx, si->enc_digest->data, si->enc_digest->length);
EVP_DigestFinal(mdctx, mdbuf, NULL);
EVP_MD_CTX_free(mdctx);
/* compare the provided hash against the computed hash */
hash = token->messageImprint->digest;
/* hash->length == EVP_MD_size(md) */
if (memcmp(mdbuf, hash->data, hash->length)) {
tohex(mdbuf, hexbuf, EVP_MD_size(md));
fprintf(stderr, "Hash value mismatch:\n\tMessage digest algorithm: %s\n",
(md_nid == NID_undef) ? "UNKNOWN" : OBJ_nid2ln(md_nid));
fprintf(stderr, "\tComputed message digest : %s\n", hexbuf);
tohex(hash->data, hexbuf, hash->length);
fprintf(stderr, "\tReceived message digest : %s\n" , hexbuf);
printf("File's message digest verification: failed\n");
return 0; /* FAILED */
} /* else Computed and received message digests matched */
} /* else Countersignature Timestamp */
TimeStampToken_free(token);
return 1; /* OK */
}
/*
* pkcs7_get_nested_signature extracts a nested signature from p7.
* The caller is responsible for freeing the returned object.
*
* If has_sig is provided, it will be set to either 1 if there is a
* SPC_NESTED_SIGNATURE attribute in p7 at all or 0 if not.
* This allows has_sig to be used to distinguish two possible scenarios
* when the function returns NULL: if has_sig is 1, it means d2i_PKCS7
* failed to decode the nested signature. However, if has_sig is 0, it
* simply means the given p7 does not have a nested signature.
*/
static PKCS7 *pkcs7_get_nested_signature(PKCS7 *p7, int *has_sig)
{
PKCS7 *ret = NULL;
PKCS7_SIGNER_INFO *si = sk_PKCS7_SIGNER_INFO_value(p7->d.sign->signer_info, 0);
ASN1_TYPE *nestedSignature = PKCS7_get_attribute(si, OBJ_txt2nid(SPC_NESTED_SIGNATURE_OBJID));
if (nestedSignature) {
ASN1_STRING *astr = nestedSignature->value.sequence;
const unsigned char *p = astr->data;
ret = d2i_PKCS7(NULL, &p, astr->length);
}
if (has_sig)
*has_sig = (nestedSignature != NULL);
return ret;
}
/*
* pkcs7_set_nested_signature adds the p7nest signature to p7
* as a nested signature (SPC_NESTED_SIGNATURE).
*/
static int pkcs7_set_nested_signature(PKCS7 *p7, PKCS7 *p7nest, time_t signing_time)
{
u_char *p = NULL;
int len = 0;
if (((len = i2d_PKCS7(p7nest, NULL)) <= 0) ||
(p = OPENSSL_malloc(len)) == NULL)
return 0;
i2d_PKCS7(p7nest, &p);
p -= len;
ASN1_STRING *astr = ASN1_STRING_new();
ASN1_STRING_set(astr, p, len);
OPENSSL_free(p);
PKCS7_SIGNER_INFO *si = sk_PKCS7_SIGNER_INFO_value(p7->d.sign->signer_info, 0);
pkcs7_add_signing_time(si, signing_time);
if (PKCS7_add_attribute(si, OBJ_txt2nid(SPC_NESTED_SIGNATURE_OBJID), V_ASN1_SEQUENCE, astr) == 0)
return 0;
return 1;
}
static int verify_timestamp(PKCS7 *p7, PKCS7 *tmstamp_p7, GLOBAL_OPTIONS *options)
{
X509_STORE *store = NULL;
PKCS7_SIGNER_INFO *si;
int ret = 1, verok = 0;
printf("TSA's certificates file: %s\n", options->untrusted);
store = X509_STORE_new();
if (!load_file_lookup(store, options->untrusted, X509_PURPOSE_TIMESTAMP_SIGN)) {
printf("\nUse the \"-untrusted\" option to add the CA cert bundle to verify timestamp server.\n");
ret = 0; /* FAILED */
}
if (ret)
verok = PKCS7_verify(tmstamp_p7, NULL, store, 0, NULL, 0);
printf("\nTimestamp Server Signature verification: %s\n", verok ? "ok" : "failed");
if (!verok) {
ERR_print_errors_fp(stdout);
ret = 0; /* FAILED */
}
/* verify the hash provided from the trusted timestamp */
si = sk_PKCS7_SIGNER_INFO_value(p7->d.sign->signer_info, 0);
verok = TST_verify(tmstamp_p7, si);
if (!verok) {
ERR_print_errors_fp(stdout);
ret = 0; /* FAILED */
}
X509_STORE_free(store);
return ret;
}
static int verify_authenticode(PKCS7 *p7, ASN1_UTCTIME *timestamp_time, GLOBAL_OPTIONS *options)
{
X509_STORE *store = NULL;
int ret = 0, verok = 0;
size_t seqhdrlen;
BIO *bio = NULL;
int day, sec;
time_t time = INVALID_TIME;
STACK_OF(X509) *signers;
seqhdrlen = asn1_simple_hdr_len(p7->d.sign->contents->d.other->value.sequence->data,
p7->d.sign->contents->d.other->value.sequence->length);
bio = BIO_new_mem_buf(p7->d.sign->contents->d.other->value.sequence->data + seqhdrlen,
p7->d.sign->contents->d.other->value.sequence->length - seqhdrlen);
store = X509_STORE_new();
if (!load_file_lookup(store, options->cafile, X509_PURPOSE_CRL_SIGN)) {
fprintf(stderr, "Failed to add store lookup file\n");
ret = 1; /* FAILED */
}
if (timestamp_time) {
if (!ASN1_TIME_diff(&day, &sec, ASN1_TIME_set(NULL, 0), timestamp_time))
ret = 1; /* FAILED */
time = 86400*day+sec;
if (!set_store_time(store, time)) {
fprintf(stderr, "Failed to set store time\n");
ret = 1; /* FAILED */
}
}
/* check extended key usage flag XKU_CODE_SIGN */
signers = PKCS7_get0_signers(p7, NULL, 0);
if (!signers || sk_X509_num(signers) != 1)
ret = 1; /* FAILED */
if (!(X509_get_extension_flags(sk_X509_value(signers, 0)) && XKU_CODE_SIGN)) {
fprintf(stderr, "Unsupported Signer's certificate purpose\n");
ret = 1; /* FAILED */
}
if (!ret) {
verok = PKCS7_verify(p7, NULL, store, bio, NULL, 0);
if (options->crlfile) {
if (!load_crlfile_lookup(store, options->crlfile)) {
fprintf(stderr, "Failed to add store lookup file\n");
ret = 1; /* FAILED */
}
if (!ret)
verok = PKCS7_verify(p7, NULL, store, bio, NULL, 0);
printf("CRL verification: %s\n", verok ? "ok" : "failed");
}
}
printf("Signature verification: %s\n", verok ? "ok" : "failed");
if (!verok) {
ERR_print_errors_fp(stdout);
ret = 1; /* FAILED */
}
BIO_free(bio);
X509_STORE_free(store);
return ret;
}
static int verify_pkcs7(PKCS7 *p7, GLOBAL_OPTIONS *options)
{
PKCS7 *tmstamp_p7 = NULL;
ASN1_UTCTIME *timestamp_time = NULL;
int ret = 0, leafok = 0;
if (!find_signer(p7, options->leafhash, &leafok))
printf("Find signers error"); /* FAILED */
if (!print_certs(p7))
printf("Print certs error"); /* FAILED */
if (!pkcs7_print_attributes(p7->d.sign, &tmstamp_p7, &timestamp_time, options->verbose))
ret = 1; /* FAILED */
if (options->leafhash != NULL) {
printf("Leaf hash match: %s\n", leafok ? "ok" : "failed");
if (!leafok)
ret = 1; /* FAILED */
}
printf("\nCAfile: %s\n", options->cafile);
if (options->crlfile)
printf("CRLfile: %s\n", options->crlfile);
if (!tmstamp_p7)
printf("\nFile is not timestamped\n");
else if (!verify_timestamp(p7, tmstamp_p7, options))
timestamp_time = NULL;
ret |= verify_authenticode(p7, timestamp_time, options);
if (tmstamp_p7) {
PKCS7_free(tmstamp_p7);
tmstamp_p7 = NULL;
}
return ret;
}
#ifdef WITH_GSF
/*
* MSI file support
*/
static gint msi_base64_decode(gint x)
{
if (x < 10)
return x + '0';
if (x < (10 + 26))
return x - 10 + 'A';
if (x < (10 + 26 + 26))
return x - 10 - 26 + 'a';
if (x == (10 + 26 + 26))
return '.';
return 1;
}
static void msi_decode(const guint8 *in, gchar *out)
{
guint count = 0;
guint8 *q = (guint8 *)out;
/* utf-8 encoding of 0x4840 */
if (in[0] == 0xe4 && in[1] == 0xa1 && in[2] == 0x80)
in += 3;
while (*in) {
guint8 ch = *in;
if ((ch == 0xe3 && in[1] >= 0xa0) || (ch == 0xe4 && in[1] < 0xa0)) {
*q++ = msi_base64_decode(in[2] & 0x7f);
*q++ = msi_base64_decode(in[1] ^ 0xa0);
in += 3;
count += 2;
continue;
}
if (ch == 0xe4 && in[1] == 0xa0) {
*q++ = msi_base64_decode(in[2] & 0x7f);
in += 3;
count++;
continue;
}
*q++ = *in++;
if (ch >= 0xc1)
*q++ = *in++;
if (ch >= 0xe0)
*q++ = *in++;
if (ch >= 0xf0)
*q++ = *in++;
count++;
}
*q = 0;
}
/*
* Sorry if this code looks a bit silly, but that seems
* to be the best solution so far...
*/
static gint msi_cmp(gpointer a, gpointer b)
{
glong anc = 0, bnc = 0;
gchar *pa = (gchar*)g_utf8_to_utf16(a, -1, NULL, &anc, NULL);
gchar *pb = (gchar*)g_utf8_to_utf16(b, -1, NULL, &bnc, NULL);
gint diff;
diff = memcmp(pa, pb, MIN(2*anc, 2*bnc));
/* apparently the longer wins */
if (diff == 0)
return 2*anc > 2*bnc ? 1 : -1;
g_free(pa);
g_free(pb);
return diff;
}
/*
* msi_sorted_infile_children returns a sorted list of all
* of the children of the given infile. The children are
* sorted according to the msi_cmp.
*
* The returned list must be freed with g_slist_free.
*/
static GSList *msi_sorted_infile_children(GsfInfile *infile)
{
GSList *sorted = NULL;
gchar decoded[0x40];
int i;
for (i = 0; i < gsf_infile_num_children(infile); i++) {
GsfInput *child = gsf_infile_child_by_index(infile, i);
const guint8 *name = (const guint8*)gsf_input_name(child);
msi_decode(name, decoded);
if (!g_strcmp0(decoded, "\05DigitalSignature"))
continue;
if (!g_strcmp0(decoded, "\05MsiDigitalSignatureEx"))
continue;
sorted = g_slist_insert_sorted(sorted, (gpointer)name, (GCompareFunc)msi_cmp);
}
return sorted;
}
/*
* msi_prehash_utf16_name converts an UTF-8 representation of
* an MSI filename to its on-disk UTF-16 representation and
* writes it to the hash BIO. It is used when calculating the
* pre-hash used for MsiDigitalSignatureEx signatures in MSI files.
*/
static gboolean msi_prehash_utf16_name(gchar *name, BIO *hash)
{
glong chars_written = 0;
gchar *u16name = (gchar*)g_utf8_to_utf16(name, -1, NULL, &chars_written, NULL);
if (u16name == NULL) {
return FALSE;
}
BIO_write(hash, u16name, 2*chars_written);
g_free(u16name);
return TRUE;
}
/*
* msi_prehash calculates the pre-hash used for 'MsiDigitalSignatureEx'
* signatures in MSI files. The pre-hash hashes only metadata (file names,
* file sizes, creation times and modification times), whereas the basic
* 'DigitalSignature' MSI signature only hashes file content.
*
* The hash is written to the hash BIO.
*/
static gboolean msi_prehash(GsfInfile *infile, gchar *dirname, BIO *hash)
{
GSList *sorted = NULL;
guint8 classid[16];
guint8 zeroes[8];
memset(&zeroes, 0, sizeof(zeroes));
gsf_infile_msole_get_class_id(GSF_INFILE_MSOLE(infile), classid);
if (dirname != NULL) {
if (!msi_prehash_utf16_name(dirname, hash))
return FALSE;
}
BIO_write(hash, classid, sizeof(classid));
BIO_write(hash, zeroes, 4);
if (dirname != NULL) {
/*
* Creation time and modification time for the root directory.
* These are always zero. The ctime and mtime of the actual
* file itself takes precedence.
*/
BIO_write(hash, zeroes, 8); /* ctime as Windows FILETIME */
BIO_write(hash, zeroes, 8); /* mtime as Windows FILETIME */
}
sorted = msi_sorted_infile_children(infile);
for (; sorted; sorted = sorted->next) {
gchar *name = (gchar*)sorted->data;
GsfInput *child = gsf_infile_child_by_name(infile, name);
if (child == NULL)
continue;
gboolean is_dir = GSF_IS_INFILE(child) && gsf_infile_num_children(GSF_INFILE(child)) > 0;
if (is_dir) {
if (!msi_prehash(GSF_INFILE(child), name, hash))
return FALSE;
} else {
if (!msi_prehash_utf16_name(name, hash))
return FALSE;
/*
* File size.
*/
gsf_off_t size = gsf_input_remaining(child);
guint32 sizebuf = GUINT32_TO_LE((guint32)size);
BIO_write(hash, &sizebuf, sizeof(sizebuf));
/*
* Reserved - must be 0. Corresponds to
* offset 0x7c..0x7f in the CDFv2 file.
*/
BIO_write(hash, zeroes, 4);
/*
* Creation time and modification time
* as Windows FILETIMEs. We keep them
* zeroed, because libgsf doesn't seem
* to support outputting them.
*/
BIO_write(hash, zeroes, 8); /* ctime as Windows FILETIME */
BIO_write(hash, zeroes, 8); /* mtime as Windows FILETIME */
}
}
g_slist_free(sorted);
return TRUE;
}
/**
* msi_handle_dir performs a direct copy of the input MSI file in infile to a new
* output file in outfile. While copying, it also writes all file content to the
* hash BIO in order to calculate a 'basic' hash that can be used for an MSI
* 'DigitalSignature' hash.
*
* msi_handle_dir is hierarchy aware: if any subdirectories are found, they will be
* visited, copied and hashed as well.
*/
static gboolean msi_handle_dir(GsfInfile *infile, GsfOutfile *outole, BIO *hash)
{
guint8 classid[16];
GSList *sorted = NULL;
gsf_infile_msole_get_class_id(GSF_INFILE_MSOLE(infile), classid);
if (outole != NULL)
gsf_outfile_msole_set_class_id(GSF_OUTFILE_MSOLE(outole), classid);
sorted = msi_sorted_infile_children(infile);
for (; sorted; sorted = sorted->next) {
gchar *name = (gchar*)sorted->data;
GsfInput *child = gsf_infile_child_by_name(infile, name);
if (child == NULL)
continue;
gboolean is_dir = GSF_IS_INFILE(child) && gsf_infile_num_children(GSF_INFILE(child)) > 0;
GsfOutput *outchild = NULL;
if (outole != NULL)
outchild = gsf_outfile_new_child(outole, name, is_dir);
if (is_dir) {
if (!msi_handle_dir(GSF_INFILE(child), GSF_OUTFILE(outchild), hash)) {
return FALSE;
}
} else {
while (gsf_input_remaining(child) > 0) {
gsf_off_t size = MIN(gsf_input_remaining(child), 4096);
guint8 const *data = gsf_input_read(child, size, NULL);
BIO_write(hash, data, size);
if (outchild != NULL && !gsf_output_write(outchild, size, data)) {
return FALSE;
}
}
}
if (outchild != NULL) {
gsf_output_close(outchild);
g_object_unref(outchild);
}
}
BIO_write(hash, classid, sizeof(classid));
g_slist_free(sorted);
return TRUE;
}
/*
* msi_verify_pkcs7 is a helper function for msi_verify_file.
* It exists to make it easier to implement verification of nested signatures.
*/
static int msi_verify_pkcs7(PKCS7 *p7, GsfInfile *infile, unsigned char *exdata,
size_t exlen, int allownest, GLOBAL_OPTIONS *options)
{
int ret = 0;
int mdtype = -1;
unsigned char mdbuf[EVP_MAX_MD_SIZE];
unsigned char cmdbuf[EVP_MAX_MD_SIZE];
#ifdef GSF_CAN_READ_MSI_METADATA
unsigned char cexmdbuf[EVP_MAX_MD_SIZE];
#endif
char hexbuf[EVP_MAX_MD_SIZE*2+1];
if (is_indirect_data_signature(p7)) {
ASN1_STRING *astr = p7->d.sign->contents->d.other->value.sequence;
const unsigned char *p = astr->data;
SpcIndirectDataContent *idc = d2i_SpcIndirectDataContent(NULL, &p, astr->length);
if (idc) {
if (idc->messageDigest && idc->messageDigest->digest && idc->messageDigest->digestAlgorithm) {
mdtype = OBJ_obj2nid(idc->messageDigest->digestAlgorithm->algorithm);
memcpy(mdbuf, idc->messageDigest->digest->data, idc->messageDigest->digest->length);
}
SpcIndirectDataContent_free(idc);
}
}
if (mdtype == -1) {
printf("Failed to extract current message digest\n\n");
ret = 1;
goto out;
}
if (p7 == NULL) {
printf("Failed to read PKCS7 signature from DigitalSignature section\n\n");
ret = 1;
goto out;
}
printf("Message digest algorithm : %s\n", OBJ_nid2sn(mdtype));
const EVP_MD *md = EVP_get_digestbynid(mdtype);
BIO *hash = BIO_new(BIO_f_md());
BIO_set_md(hash, md);
BIO_push(hash, BIO_new(BIO_s_null()));
if (exdata) {
/*
* Until libgsf can read more MSI metadata, we can't
* really verify them by plowing through the file.
* Verifying files signed by osslsigncode itself works,
* though!
*
* For now, the compromise is to use the hash given
* by the file, which is equivalent to verifying a
* non-MsiDigitalSignatureEx signature from a security
* perspective, because we'll only be calculating the
* file content hashes ourselves.
*/
#ifdef GSF_CAN_READ_MSI_METADATA
BIO *prehash = BIO_new(BIO_f_md());
BIO_set_md(prehash, md);
BIO_push(prehash, BIO_new(BIO_s_null()));
if (!msi_prehash(infile, NULL, prehash)) {
ret = 1;
goto out;
}
BIO_gets(prehash, (char*)cexmdbuf, EVP_MAX_MD_SIZE);
BIO_write(hash, (char*)cexmdbuf, EVP_MD_size(md));
#else
BIO_write(hash, (char *)exdata, EVP_MD_size(md));
#endif
}
if (!msi_handle_dir(infile, NULL, hash)) {
ret = 1;
goto out;
}
BIO_gets(hash, (char*)cmdbuf, EVP_MAX_MD_SIZE);
tohex(cmdbuf, hexbuf, EVP_MD_size(md));
int mdok = !memcmp(mdbuf, cmdbuf, EVP_MD_size(md));
if (!mdok) ret = 1;
printf("Calculated DigitalSignature : %s", hexbuf);
if (mdok) {
printf("\n");
} else {
tohex(mdbuf, hexbuf, EVP_MD_size(md));
printf(" MISMATCH!!! FILE HAS %s\n", hexbuf);
}
#ifdef GSF_CAN_READ_MSI_METADATA
if (exdata) {
tohex(cexmdbuf, hexbuf, EVP_MD_size(md));
int exok = !memcmp(exdata, cexmdbuf, MIN((size_t)EVP_MD_size(md), exlen));
if (!exok) ret = 1;
printf("Calculated MsiDigitalSignatureEx : %s", hexbuf);
if (exok) {
printf("\n");
} else {
tohex(exdata, hexbuf, EVP_MD_size(md));
printf(" MISMATCH!!! FILE HAS %s\n", hexbuf);
}
}
#endif
printf("\n");
ret |= verify_pkcs7(p7, options);
printf("\n");
if (allownest) {
int has_sig = 0;
PKCS7 *p7nest = pkcs7_get_nested_signature(p7, &has_sig);
if (p7nest) {
int nest_ret = msi_verify_pkcs7(p7nest, infile, exdata, exlen, 0, options);
if (ret)
ret = nest_ret;
PKCS7_free(p7nest);
} else if (!p7nest && has_sig) {
printf("Failed to decode nested signature!\n");
ret = 1;
}
}
out:
return ret;
}
/*
* msi_verify_file checks whether or not the signature of infile is valid.
*/
static int msi_verify_file(GsfInfile *infile, GLOBAL_OPTIONS *options)
{
GsfInput *sig = NULL;
GsfInput *exsig = NULL;
unsigned char *exdata = NULL;
unsigned char *indata = NULL;
gchar decoded[0x40];
int i, ret = 0;
PKCS7 *p7 = NULL;
for (i = 0; i < gsf_infile_num_children(infile); i++) {
GsfInput *child = gsf_infile_child_by_index(infile, i);
const guint8 *name = (const guint8*)gsf_input_name(child);
msi_decode(name, decoded);
if (!g_strcmp0(decoded, "\05DigitalSignature"))
sig = child;
if (!g_strcmp0(decoded, "\05MsiDigitalSignatureEx"))
exsig = child;
}
if (sig == NULL) {
printf("MSI file has no signature\n\n");
ret = 1;
goto out;
}
unsigned long inlen = (unsigned long) gsf_input_remaining(sig);
indata = OPENSSL_malloc(inlen);
if (gsf_input_read(sig, inlen, indata) == NULL) {
ret = 1;
goto out;
}
unsigned long exlen = 0;
if (exsig != NULL) {
exlen = (unsigned long) gsf_input_remaining(exsig);
exdata = OPENSSL_malloc(exlen);
if (gsf_input_read(exsig, exlen, exdata) == NULL) {
ret = 1;
goto out;
}
}
const unsigned char *blob = (unsigned char *)indata;
p7 = d2i_PKCS7(NULL, &blob, inlen);
ret = msi_verify_pkcs7(p7, infile, exdata, exlen, 1, options);
out:
OPENSSL_free(indata);
OPENSSL_free(exdata);
if (p7)
PKCS7_free(p7);
return ret;
}
static int msi_extract_dse(GsfInfile *infile, unsigned char **dsebuf,
unsigned long *dselen, int *has_dse)
{
GsfInput *exsig = NULL;
gchar decoded[0x40];
unsigned char *buf = NULL;
gsf_off_t size = 0;
int i, ret = 0;
for (i = 0; i < gsf_infile_num_children(infile); i++) {
GsfInput *child = gsf_infile_child_by_index(infile, i);
const guint8 *name = (const guint8*)gsf_input_name(child);
msi_decode(name, decoded);
if (!g_strcmp0(decoded, "\05MsiDigitalSignatureEx"))
exsig = child;
}
if (exsig == NULL) {
ret = 1;
goto out;
}
if (has_dse != NULL) {
*has_dse = 1;
}
size = gsf_input_remaining(exsig);
if (dselen != NULL) {
*dselen = (unsigned long) size;
}
if (dsebuf != NULL) {
buf = OPENSSL_malloc(size);
if (gsf_input_read(exsig, size, buf) == NULL) {
ret = 1;
goto out;
}
*dsebuf = buf;
}
out:
return ret;
}
/*
* msi_extract_signature_to_file extracts the MSI DigitalSignaure from infile
* to a file at the path given by outfile.
*/
static int msi_extract_signature_to_file(GsfInfile *infile, char *outfile)
{
char hexbuf[EVP_MAX_MD_SIZE*2+1];
GsfInput *sig = NULL;
GsfInput *exsig = NULL;
unsigned char *exdata = NULL;
unsigned long exlen = 0;
BIO *outdata = NULL;
gchar decoded[0x40];
int i, ret = 0;
for (i = 0; i < gsf_infile_num_children(infile); i++) {
GsfInput *child = gsf_infile_child_by_index(infile, i);
const guint8 *name = (const guint8*)gsf_input_name(child);
msi_decode(name, decoded);
if (!g_strcmp0(decoded, "\05DigitalSignature"))
sig = child;
if (!g_strcmp0(decoded, "\05MsiDigitalSignatureEx"))
exsig = child;
}
if (sig == NULL) {
printf("MSI file has no signature\n\n");
ret = 1;
goto out;
}
/* Create outdata file */
outdata = BIO_new_file(outfile, "w+bx");
if (outdata == NULL) {
printf("Unable to create %s\n\n", outfile);
ret = 1;
goto out;
}
while (gsf_input_remaining(sig) > 0) {
gsf_off_t size = MIN(gsf_input_remaining(sig), 4096);
guint8 const *data = gsf_input_read(sig, size, NULL);
BIO_write(outdata, data, size);
}
if (exsig != NULL) {
exlen = (unsigned long) gsf_input_remaining(exsig);
if (exlen > EVP_MAX_MD_SIZE) {
printf("MsiDigitalSignatureEx is larger than EVP_MAX_MD_SIZE\n");
ret = 1;
goto out;
}
exdata = OPENSSL_malloc(exlen);
if (gsf_input_read(exsig, exlen, exdata) == NULL) {
printf("Unable to read MsiDigitalSignatureEx\n");
ret = 1;
goto out;
}
tohex(exdata, hexbuf, exlen);
printf("Note: MSI includes a MsiDigitalSignatureEx section\n");
printf("MsiDigitalSignatureEx pre-hash: %s\n", hexbuf);
}
out:
OPENSSL_free(exdata);
if (outdata)
BIO_free_all(outdata);
return ret;
}
static PKCS7 *msi_extract_signature_to_pkcs7(GsfInfile *infile)
{
GsfInput *sig = NULL;
gchar decoded[0x40];
PKCS7 *p7 = NULL;
u_char *buf = NULL;
gsf_off_t size = 0;
int i = 0;
for (i = 0; i < gsf_infile_num_children(infile); i++) {
GsfInput *child = gsf_infile_child_by_index(infile, i);
const guint8 *name = (const guint8*)gsf_input_name(child);
msi_decode(name, decoded);
if (!g_strcmp0(decoded, "\05DigitalSignature"))
sig = child;
}
if (sig == NULL)
goto out;
size = gsf_input_remaining(sig);
buf = OPENSSL_malloc(size);
if (gsf_input_read(sig, size, buf) == NULL)
goto out;
const unsigned char *p7buf = buf;
p7 = d2i_PKCS7(NULL, &p7buf, size);
out:
OPENSSL_free(buf);
return p7;
}
static int msi_extract_file(GsfInfile *ole, GLOBAL_OPTIONS *options)
{
int ret = 0;
BIO *outdata;
PKCS7 *sig;
if (options->output_pkcs7) {
sig = msi_extract_signature_to_pkcs7(ole);
if (!sig) {
fprintf(stderr, "Unable to extract existing signature\n");
return 1; /* FAILED */
}
outdata = BIO_new_file(options->outfile, "w+bx");
if (outdata == NULL) {
fprintf(stderr, "Unable to create %s\n", options->outfile);
return 1; /* FAILED */
}
ret = !PEM_write_bio_PKCS7(outdata, sig);
BIO_free_all(outdata);
} else {
ret = msi_extract_signature_to_file(ole, options->outfile);
}
return ret;
}
/*
* Perform a sanity check for the MsiDigitalSignatureEx section.
* If the file we're attempting to sign has an MsiDigitalSignatureEx
* section, we can't add a nested signature of a different MD type
* without breaking the initial signature.
*/
static int msi_check_MsiDigitalSignatureEx(GsfInfile *ole, const EVP_MD *md)
{
unsigned long dselen = 0;
int mdlen, has_dse = 0;
if (msi_extract_dse(ole, NULL, &dselen, &has_dse) != 0 && has_dse) {
fprintf(stderr, "Unable to extract MsiDigitalSigantureEx section\n\n");
return 0; /* FAILED */
}
if (has_dse) {
mdlen = EVP_MD_size(md);
if (dselen != (unsigned long)mdlen) {
fprintf(stderr,"Unable to add nested signature with a different MD type (-h parameter) "
"than what exists in the MSI file already.\nThis is due to the presence of "
"MsiDigitalSigantureEx (-add-msi-dse parameter).\n\n");
return 0; /* FAILED */
}
}
return 1; /* OK */
}
/*
* MsiDigitalSignatureEx is an enhanced signature type that
* can be used when signing MSI files. In addition to
* file content, it also hashes some file metadata, specifically
* file names, file sizes, creation times and modification times.
*
* The file content hashing part stays the same, so the
* msi_handle_dir() function can be used across both variants.
*
* When an MsiDigitalSigntaureEx section is present in an MSI file,
* the meaning of the DigitalSignature section changes: Instead
* of being merely a file content hash (as what is output by the
* msi_handle_dir() function), it is now hashes both content
* and metadata.
*
* Here is how it works:
*
* First, a "pre-hash" is calculated. This is the "metadata" hash.
* It iterates over the files in the MSI in the same order as the
* file content hashing method would - but it only processes the
* metadata.
*
* Once the pre-hash is calculated, a new hash is created for
* calculating the hash of the file content. The output of the
* pre-hash is added as the first element of the file content hash.
*
* After the pre-hash is written, what follows is the "regular"
* stream of data that would normally be written when performing
* file content hashing.
*
* The output of this hash, which combines both metadata and file
* content, is what will be output in signed form to the
* DigitalSignature section when in 'MsiDigitalSignatureEx' mode.
*
* As mentioned previously, this new mode of operation is signalled
* by the presence of a 'MsiDigitalSignatureEx' section in the MSI
* file. This section must come after the 'DigitalSignature'
* section, and its content must be the output of the pre-hash
* ("metadata") hash.
*/
static int msi_calc_MsiDigitalSignatureEx(GsfInfile *ole, const EVP_MD *md,
BIO *hash, GSF_PARAMS *gsfparams)
{
BIO *prehash;
prehash = BIO_new(BIO_f_md());
BIO_set_md(prehash, md);
BIO_push(prehash, BIO_new(BIO_s_null()));
if (!msi_prehash(ole, NULL, prehash)) {
fprintf(stderr, "Unable to calculate MSI pre-hash ('metadata') hash\n");
return 0; /* FAILED */
}
gsfparams->len_msiex = BIO_gets(prehash, (char*)gsfparams->p_msiex, EVP_MAX_MD_SIZE);
BIO_write(hash, gsfparams->p_msiex, gsfparams->len_msiex);
return 1; /* OK */
}
#endif
static int msi_add_DigitalSignature(GsfOutfile *outole, u_char *p, int len)
{
GsfOutput *child;
int ret = 1;
child = gsf_outfile_new_child(outole, "\05DigitalSignature", FALSE);
if (!gsf_output_write(child, len, p))
ret = 0;
gsf_output_close(child);
return ret;
}
static int msi_add_MsiDigitalSignatureEx(GsfOutfile *outole, GSF_PARAMS *gsfparams)
{
GsfOutput *child;
int ret = 1;
child = gsf_outfile_new_child(outole, "\05MsiDigitalSignatureEx", FALSE);
if (!gsf_output_write(child, gsfparams->len_msiex, gsfparams->p_msiex))
ret = 0;
gsf_output_close(child);
return ret;
}
/*
* PE file support
*/
static void pe_calc_digest(BIO *bio, const EVP_MD *md, unsigned char *mdbuf, FILE_HEADER *header)
{
static unsigned char bfb[16*1024*1024];
EVP_MD_CTX *mdctx;
mdctx = EVP_MD_CTX_new();
EVP_DigestInit(mdctx, md);
memset(mdbuf, 0, EVP_MAX_MD_SIZE);
(void)BIO_seek(bio, 0);
BIO_read(bio, bfb, header->header_size + 88);
EVP_DigestUpdate(mdctx, bfb, header->header_size + 88);
BIO_read(bio, bfb, 4);
BIO_read(bio, bfb, 60 + header->pe32plus * 16);
EVP_DigestUpdate(mdctx, bfb, 60 + header->pe32plus * 16);
BIO_read(bio, bfb, 8);
size_t n = header->header_size + 88 + 4 + 60 + header->pe32plus * 16 + 8;
while (n < header->sigpos) {
size_t want = header->sigpos - n;
if (want > sizeof(bfb))
want = sizeof(bfb);
int l = BIO_read(bio, bfb, want);
if (l <= 0)
break;
EVP_DigestUpdate(mdctx, bfb, l);
n += l;
}
EVP_DigestFinal(mdctx, mdbuf, NULL);
EVP_MD_CTX_free(mdctx);
}
static void pe_extract_page_hash(SpcAttributeTypeAndOptionalValue *obj,
unsigned char **ph, size_t *phlen, int *phtype)
{
*phlen = 0;
const unsigned char *blob = obj->value->value.sequence->data;
SpcPeImageData *id = d2i_SpcPeImageData(NULL, &blob, obj->value->value.sequence->length);
if (id == NULL)
return;
if (id->file->type != 1) {
SpcPeImageData_free(id);
return;
}
SpcSerializedObject *so = id->file->value.moniker;
if (so->classId->length != sizeof(classid_page_hash) ||
memcmp(so->classId->data, classid_page_hash, sizeof (classid_page_hash))) {
SpcPeImageData_free(id);
return;
}
/* skip ASN.1 SET hdr */
size_t l = asn1_simple_hdr_len(so->serializedData->data, so->serializedData->length);
blob = so->serializedData->data + l;
obj = d2i_SpcAttributeTypeAndOptionalValue(NULL, &blob, so->serializedData->length - l);
SpcPeImageData_free(id);
if (!obj)
return;
char buf[128];
*phtype = 0;
buf[0] = 0x00;
OBJ_obj2txt(buf, sizeof(buf), obj->type, 1);
if (!strcmp(buf, SPC_PE_IMAGE_PAGE_HASHES_V1)) {
*phtype = NID_sha1;
} else if (!strcmp(buf, SPC_PE_IMAGE_PAGE_HASHES_V2)) {
*phtype = NID_sha256;
} else {
SpcAttributeTypeAndOptionalValue_free(obj);
return;
}
/* Skip ASN.1 SET hdr */
size_t l2 = asn1_simple_hdr_len(obj->value->value.sequence->data, obj->value->value.sequence->length);
/* Skip ASN.1 OCTET STRING hdr */
l = asn1_simple_hdr_len(obj->value->value.sequence->data + l2, obj->value->value.sequence->length - l2);
l += l2;
*phlen = obj->value->value.sequence->length - l;
*ph = OPENSSL_malloc(*phlen);
memcpy(*ph, obj->value->value.sequence->data + l, *phlen);
SpcAttributeTypeAndOptionalValue_free(obj);
}
static int pe_verify_pkcs7(PKCS7 *p7, char *indata, FILE_HEADER *header,
int allownest, GLOBAL_OPTIONS *options)
{
int ret = 0;
int mdtype = -1, phtype = -1;
unsigned char mdbuf[EVP_MAX_MD_SIZE];
unsigned char cmdbuf[EVP_MAX_MD_SIZE];
char hexbuf[EVP_MAX_MD_SIZE*2+1];
unsigned char *ph = NULL;
size_t phlen = 0;
BIO *bio = NULL;
if (is_indirect_data_signature(p7)) {
ASN1_STRING *astr = p7->d.sign->contents->d.other->value.sequence;
const unsigned char *p = astr->data;
SpcIndirectDataContent *idc = d2i_SpcIndirectDataContent(NULL, &p, astr->length);
if (idc) {
pe_extract_page_hash(idc->data, &ph, &phlen, &phtype);
if (idc->messageDigest && idc->messageDigest->digest && idc->messageDigest->digestAlgorithm) {
mdtype = OBJ_obj2nid(idc->messageDigest->digestAlgorithm->algorithm);
memcpy(mdbuf, idc->messageDigest->digest->data, idc->messageDigest->digest->length);
}
SpcIndirectDataContent_free(idc);
}
}
if (mdtype == -1) {
printf("Failed to extract current message digest\n\n");
return -1;
}
printf("Message digest algorithm : %s\n", OBJ_nid2sn(mdtype));
const EVP_MD *md = EVP_get_digestbynid(mdtype);
tohex(mdbuf, hexbuf, EVP_MD_size(md));
printf("Current message digest : %s\n", hexbuf);
bio = BIO_new_mem_buf(indata, header->sigpos + header->siglen);
pe_calc_digest(bio, md, cmdbuf, header);
BIO_free(bio);
tohex(cmdbuf, hexbuf, EVP_MD_size(md));
int mdok = !memcmp(mdbuf, cmdbuf, EVP_MD_size(md));
if (!mdok) ret = 1;
printf("Calculated message digest : %s%s\n\n", hexbuf, mdok?"":" MISMATCH!!!");
if (phlen > 0) {
printf("Page hash algorithm : %s\n", OBJ_nid2sn(phtype));
tohex(ph, hexbuf, (phlen < 32) ? phlen : 32);
printf("Page hash : %s ...\n", hexbuf);
size_t cphlen = 0;
unsigned char *cph = pe_calc_page_hash(indata, header->header_size, header->pe32plus, header->sigpos, phtype, &cphlen);
tohex(cph, hexbuf, (cphlen < 32) ? cphlen : 32);
mdok = (phlen != cphlen) || memcmp(ph, cph, phlen);
if (mdok) ret = 1;
printf("Calculated page hash : %s ...%s\n\n", hexbuf, mdok ? " MISMATCH!!!":"");
OPENSSL_free(ph);
OPENSSL_free(cph);
}
ret |= verify_pkcs7(p7, options);
printf("\n");
if (allownest) {
int has_sig = 0;
PKCS7 *p7nest = pkcs7_get_nested_signature(p7, &has_sig);
if (p7nest) {
int nest_ret = pe_verify_pkcs7(p7nest, indata, header, 0, options);
if (ret)
ret = nest_ret;
PKCS7_free(p7nest);
} else if (!p7nest && has_sig) {
printf("Failed to decode nested signature!\n");
ret = 1;
}
}
return ret;
}
/*
* pe_extract_existing_pkcs7 retrieves a decoded PKCS7 struct
* corresponding to the existing signature of the PE file.
*/
static PKCS7 *pe_extract_existing_pkcs7(char *indata, FILE_HEADER *header)
{
size_t pos = 0;
PKCS7 *p7 = NULL;
while (pos < header->siglen) {
size_t l = GET_UINT32_LE(indata + header->sigpos + pos);
unsigned short certrev = GET_UINT16_LE(indata + header->sigpos + pos + 4);
unsigned short certtype = GET_UINT16_LE(indata + header->sigpos + pos + 6);
if (certrev == WIN_CERT_REVISION_2 && certtype == WIN_CERT_TYPE_PKCS_SIGNED_DATA) {
const unsigned char *blob = (unsigned char*)indata + header->sigpos + pos + 8;
p7 = d2i_PKCS7(NULL, &blob, l - 8);
}
if (l%8)
l += (8 - l%8);
pos += l;
}
return p7;
}
static int pe_verify_file(char *indata, FILE_HEADER *header, GLOBAL_OPTIONS *options)
{
int ret = 0;
if (header->siglen == 0)
header->siglen = header->fileend;
printf("Current PE checksum : %08X\n", header->pe_checksum);
BIO *bio = BIO_new_mem_buf(indata, header->sigpos + header->siglen);
unsigned int real_pe_checksum = pe_calc_checksum(bio, header);
BIO_free(bio);
if (header->pe_checksum && header->pe_checksum != real_pe_checksum)
ret = 1;
printf("Calculated PE checksum: %08X%s\n\n", real_pe_checksum,
ret ? " MISMATCH!!!!" : "");
if (header->sigpos == 0) {
printf("No signature found\n\n");
return 1;
}
PKCS7 *p7 = pe_extract_existing_pkcs7(indata, header);
if (!p7) {
printf("Failed to extract PKCS7 data\n\n");
return -1;
}
ret = pe_verify_pkcs7(p7, indata, header, 1, options);
PKCS7_free(p7);
return ret;
}
static int pe_extract_file(char *indata, FILE_HEADER *header, BIO *outdata, int output_pkcs7)
{
int ret = 0;
PKCS7 *sig;
(void)BIO_reset(outdata);
if (output_pkcs7) {
sig = pe_extract_existing_pkcs7(indata, header);
if (!sig) {
fprintf(stderr, "Unable to extract existing signature\n");
return 1; /* FAILED */
}
ret = !PEM_write_bio_PKCS7(outdata, sig);
} else {
ret = !BIO_write(outdata, indata + header->sigpos, header->siglen);
}
return ret;
}
static int pe_verify_header(char *indata, char *infile, size_t filesize, FILE_HEADER *header)
{
int ret = 1;
if (filesize < 64) {
printf("Corrupt DOS file - too short: %s\n", infile);
ret = 0; /* FAILED */
}
header->header_size = GET_UINT32_LE(indata+60);
if (filesize < header->header_size + 160) {
printf("Corrupt DOS file - too short: %s\n", infile);
ret = 0; /* FAILED */
}
if (memcmp(indata + header->header_size, "PE\0\0", 4)) {
printf("Unrecognized DOS file type: %s\n", infile);
ret = 0; /* FAILED */
}
header->magic = GET_UINT16_LE(indata + header->header_size + 24);
if (header->magic == 0x20b) {
header->pe32plus = 1;
} else if (header->magic == 0x10b) {
header->pe32plus = 0;
} else {
printf("Corrupt PE file - found unknown magic %04X: %s\n", header->magic, infile);
ret = 0; /* FAILED */
}
header->pe_checksum = GET_UINT32_LE(indata + header->header_size + 88);
header->nrvas = GET_UINT32_LE(indata + header->header_size + 116 + header->pe32plus * 16);
if (header->nrvas < 5) {
printf("Can not handle PE files without certificate table resource: %s\n", infile);
ret = 0; /* FAILED */
}
header->sigpos = GET_UINT32_LE(indata + header->header_size + 152 + header->pe32plus * 16);
header->siglen = GET_UINT32_LE(indata + header->header_size + 152 + header->pe32plus * 16 + 4);
/* Since fix for MS Bulletin MS12-024 we can really assume
that signature should be last part of file */
if (header->sigpos > 0 && header->sigpos < filesize && header->sigpos + header->siglen != filesize) {
printf("Corrupt PE file - current signature not at end of file: %s\n", infile);
ret = 0; /* FAILED */
}
return ret;
}
static void pe_modify_header(char *indata, FILE_HEADER *header, BIO *hash, BIO *outdata)
{
int len = 0, i;
static char buf[64*1024];
i = header->header_size + 88;
BIO_write(hash, indata, i);
memset(buf, 0, 4);
BIO_write(outdata, buf, 4); /* zero out checksum */
i += 4;
BIO_write(hash, indata + i, 60 + header->pe32plus * 16);
i += 60 + header->pe32plus * 16;
memset(buf, 0, 8);
BIO_write(outdata, buf, 8); /* zero out sigtable offset + pos */
i += 8;
BIO_write(hash, indata + i, header->fileend - i);
/* pad (with 0's) pe file to 8 byte boundary */
len = 8 - header->fileend % 8;
if (len > 0 && len != 8) {
memset(buf, 0, len);
BIO_write(hash, buf, len);
header->fileend += len;
}
}
/*
* CAB file support
* https://www.file-recovery.com/cab-signature-format.htm
*/
static int cab_verify_header(char *indata, char *infile, size_t filesize, FILE_HEADER *header)
{
int ret = 1;
size_t reserved;
if (filesize < 44) {
printf("Corrupt cab file - too short: %s\n", infile);
ret = 0; /* FAILED */
}
reserved = GET_UINT32_LE(indata + 4);
if (reserved) {
printf("Reserved1: 0x%08lX\n", reserved);
ret = 0; /* FAILED */
}
/* flags specify bit-mapped values that indicate the presence of optional data */
header->flags = GET_UINT16_LE(indata + 30);
#if 1
if (header->flags & FLAG_PREV_CABINET) {
/* FLAG_NEXT_CABINET works */
printf("Multivolume cabinet file is unsupported: flags 0x%04lX\n", header->flags);
ret = 0; /* FAILED */
}
#endif
if (header->flags & FLAG_RESERVE_PRESENT) {
/*
* Additional headers is located at offset 36 (cbCFHeader, cbCFFolder, cbCFData);
* size of header (4 bytes, little-endian order) must be 20 (checkpoint).
*/
header->header_size = GET_UINT32_LE(indata + 36);
if (header->header_size != 20) {
printf("Additional header size: 0x%08lX\n", header->header_size);
ret = 0; /* FAILED */
}
reserved = GET_UINT32_LE(indata + 40);
if (reserved != 0x00100000) {
printf("abReserved: 0x%08lX\n", reserved);
ret = 0; /* FAILED */
}
/*
* File size is defined at offset 8, however if additional header exists, this size is not valid.
* sigpos - additional data offset is located at offset 44 (from file beginning)
* and consist of 4 bytes (little-endian order)
* siglen - additional data size is located at offset 48 (from file beginning)
* and consist of 4 bytes (little-endian order)
* If there are additional headers, size of the CAB archive file is calcualted
* as additional data offset plus additional data size.
*/
header->sigpos = GET_UINT32_LE(indata + 44);
header->siglen = GET_UINT32_LE(indata + 48);
if (header->sigpos < filesize && header->sigpos + header->siglen != filesize) {
printf("Additional data offset:\t%lu bytes\nAdditional data size:\t%lu bytes\n",
header->sigpos, header->siglen);
printf("File size:\t\t%lu bytes\n", filesize);
ret = 0; /* FAILED */
}
}
return ret;
}
static int cab_calc_digest(BIO *bio, const EVP_MD *md, unsigned char *mdbuf, size_t offset)
{
size_t coffFiles, nfolders, flags;
static unsigned char bfb[16*1024*1024];
EVP_MD_CTX *mdctx;
mdctx = EVP_MD_CTX_new();
EVP_DigestInit(mdctx, md);
memset(mdbuf, 0, EVP_MAX_MD_SIZE);
(void)BIO_seek(bio, 0);
/* u1 signature[4] 4643534D MSCF: 0-3 */
BIO_read(bio, bfb, 4);
EVP_DigestUpdate(mdctx, bfb, 4);
/* u4 reserved1 00000000: 4-7 */
BIO_read(bio, bfb, 4);
/*
* u4 cbCabinet - size of this cabinet file in bytes: 8-11
* u4 reserved2 00000000: 12-15
*/
BIO_read(bio, bfb, 8);
EVP_DigestUpdate(mdctx, bfb, 8);
/* u4 coffFiles - offset of the first CFFILE entry: 16-19 */
BIO_read(bio, bfb, 4);
coffFiles = GET_UINT32_LE(bfb);
EVP_DigestUpdate(mdctx, bfb, 4);
/*
* u4 reserved3 00000000: 20-23
* u1 versionMinor 03: 24
* u1 versionMajor 01: 25
*/
BIO_read(bio, bfb, 6);
EVP_DigestUpdate(mdctx, bfb, 6);
/* u2 cFolders - number of CFFOLDER entries in this cabinet: 26-27 */
BIO_read(bio, bfb, 2);
nfolders = GET_UINT16_LE(bfb);
EVP_DigestUpdate(mdctx, bfb, 2);
/* u2 cFiles - number of CFFILE entries in this cabinet: 28-29 */
BIO_read(bio, bfb, 2);
EVP_DigestUpdate(mdctx, bfb, 2);
/* u2 flags: 30-31 */
BIO_read(bio, bfb, 2);
flags = GET_UINT16_LE(bfb);
EVP_DigestUpdate(mdctx, bfb, 2);
/* u2 setID must be the same for all cabinets in a set: 32-33 */
BIO_read(bio, bfb, 2);
EVP_DigestUpdate(mdctx, bfb, 2);
/*
* u2 iCabinet - number of this cabinet file in a set: 34-35
* u2 cbCFHeader: 36-37
* u1 cbCFFolder: 38
* u1 cbCFData: 39
* u22 abReserve: 40-55
* - Additional data offset: 44-47
* - Additional data size: 48-51
*/
BIO_read(bio, bfb, 22);
/* u22 abReserve: 56-59 */
BIO_read(bio, bfb, 4);
EVP_DigestUpdate(mdctx, bfb, 4);
/* TODO */
if (flags & FLAG_PREV_CABINET) {
/* szCabinetPrev */
do {
BIO_read(bio, bfb, 1);
EVP_DigestUpdate(mdctx, bfb, 1);
} while (bfb[0]);
/* szDiskPrev */
do {
BIO_read(bio, bfb, 1);
EVP_DigestUpdate(mdctx, bfb, 1);
} while (bfb[0]);
}
if (flags & FLAG_NEXT_CABINET) {
/* szCabinetNext */
do {
BIO_read(bio, bfb, 1);
EVP_DigestUpdate(mdctx, bfb, 1);
} while (bfb[0]);
/* szDiskNext */
do {
BIO_read(bio, bfb, 1);
EVP_DigestUpdate(mdctx, bfb, 1);
} while (bfb[0]);
}
/*
* (u8 * cFolders) CFFOLDER - structure contains information about
* one of the folders or partial folders stored in this cabinet file
*/
while (nfolders) {
BIO_read(bio, bfb, 8);
EVP_DigestUpdate(mdctx, bfb, 8);
nfolders--;
}
/* (variable) ab - the compressed data bytes */
while (coffFiles < offset) {
size_t want = offset - coffFiles;
if (want > sizeof(bfb))
want = sizeof(bfb);
int l = BIO_read(bio, bfb, want);
if (l <= 0)
break;
EVP_DigestUpdate(mdctx, bfb, l);
coffFiles += l;
}
EVP_DigestFinal(mdctx, mdbuf, NULL);
EVP_MD_CTX_free(mdctx);
return 0; /* OK */
}
static int cab_verify_pkcs7(PKCS7 *p7, char *indata, FILE_HEADER *header,
int allownest, GLOBAL_OPTIONS *options)
{
int ret = 0;
int mdtype = -1, phtype = -1;
unsigned char mdbuf[EVP_MAX_MD_SIZE];
unsigned char cmdbuf[EVP_MAX_MD_SIZE];
char hexbuf[EVP_MAX_MD_SIZE*2+1];
unsigned char *ph = NULL;
size_t phlen = 0;
BIO *bio = NULL;
if (is_indirect_data_signature(p7)) {
ASN1_STRING *astr = p7->d.sign->contents->d.other->value.sequence;
const unsigned char *p = astr->data;
SpcIndirectDataContent *idc = d2i_SpcIndirectDataContent(NULL, &p, astr->length);
if (idc) {
pe_extract_page_hash(idc->data, &ph, &phlen, &phtype);
if (idc->messageDigest && idc->messageDigest->digest && idc->messageDigest->digestAlgorithm) {
mdtype = OBJ_obj2nid(idc->messageDigest->digestAlgorithm->algorithm);
memcpy(mdbuf, idc->messageDigest->digest->data, idc->messageDigest->digest->length);
}
SpcIndirectDataContent_free(idc);
}
}
if (mdtype == -1) {
printf("Failed to extract current message digest\n\n");
return -1; /* FAILED */
}
printf("Message digest algorithm : %s\n", OBJ_nid2sn(mdtype));
const EVP_MD *md = EVP_get_digestbynid(mdtype);
tohex(mdbuf, hexbuf, EVP_MD_size(md));
printf("Current message digest : %s\n", hexbuf);
bio = BIO_new_mem_buf(indata, header->sigpos);
ret |= cab_calc_digest(bio, md, cmdbuf, header->sigpos);
BIO_free(bio);
tohex(cmdbuf, hexbuf, EVP_MD_size(md));
int mdok = !memcmp(mdbuf, cmdbuf, EVP_MD_size(md));
if (!mdok)
ret = 1; /* FAILED */
printf("Calculated message digest : %s%s\n\n", hexbuf, mdok?"":" MISMATCH!!!");
ret |= verify_pkcs7(p7, options);
printf("\n");
if (allownest) {
int has_sig = 0;
PKCS7 *p7nest = pkcs7_get_nested_signature(p7, &has_sig);
if (p7nest) {
int nest_ret = cab_verify_pkcs7(p7nest, indata, header, 0, options);
if (ret)
ret = nest_ret;
PKCS7_free(p7nest);
} else if (!p7nest && has_sig) {
printf("Failed to decode nested signature!\n");
ret = 1;
}
}
return ret;
}
static PKCS7 *cab_extract_existing_pkcs7(char *indata, FILE_HEADER *header)
{
PKCS7 *p7 = NULL;
const unsigned char *blob;
blob = (unsigned char*)indata + header->sigpos;
p7 = d2i_PKCS7(NULL, &blob, header->siglen);
return p7;
}
static int cab_verify_file(char *indata, FILE_HEADER *header, GLOBAL_OPTIONS *options)
{
PKCS7 *p7;
int ret = 0;
if (header->header_size != 20) {
printf("No signature found\n\n");
return 1; /* FAILED */
}
p7 = cab_extract_existing_pkcs7(indata, header);
if (!p7) {
printf("Failed to extract PKCS7 data\n\n");
return -1; /* FAILED */
}
ret |= cab_verify_pkcs7(p7, indata, header, 1, options);
PKCS7_free(p7);
return ret;
}
static int cab_extract_file(char *indata, FILE_HEADER *header, BIO *outdata, int output_pkcs7)
{
int ret = 0;
PKCS7 *sig;
(void)BIO_reset(outdata);
if (output_pkcs7) {
sig = cab_extract_existing_pkcs7(indata, header);
if (!sig) {
fprintf(stderr, "Unable to extract existing signature\n");
return 1; /* FAILED */
}
ret = !PEM_write_bio_PKCS7(outdata, sig);
} else {
ret = !BIO_write(outdata, indata + header->sigpos, header->siglen);
}
return ret;
}
static void cab_optional_names(size_t flags, char *indata, BIO *outdata, int *len)
{
int i;
i = *len;
/* TODO */
if (flags & FLAG_PREV_CABINET) {
/* szCabinetPrev */
while (GET_UINT8_LE(indata+i)) {
BIO_write(outdata, indata+i, 1);
i++;
}
BIO_write(outdata, indata+i, 1);
i++;
/* szDiskPrev */
while (GET_UINT8_LE(indata+i)) {
BIO_write(outdata, indata+i, 1);
i++;
}
BIO_write(outdata, indata+i, 1);
i++;
}
if (flags & FLAG_NEXT_CABINET) {
/* szCabinetNext */
while (GET_UINT8_LE(indata+i)) {
BIO_write(outdata, indata+i, 1);
i++;
}
BIO_write(outdata, indata+i, 1);
i++;
/* szDiskNext */
while (GET_UINT8_LE(indata+i)) {
BIO_write(outdata, indata+i, 1);
i++;
}
BIO_write(outdata, indata+i, 1);
i++;
}
*len = i;
}
static void cab_remove_file(char *indata, FILE_HEADER *header, size_t filesize, BIO *outdata)
{
int i;
unsigned short nfolders;
size_t tmp, flags;
static char buf[64*1024];
/*
* u1 signature[4] 4643534D MSCF: 0-3
* u4 reserved1 00000000: 4-7
*/
BIO_write(outdata, indata, 8);
/* u4 cbCabinet - size of this cabinet file in bytes: 8-11 */
tmp = GET_UINT32_LE(indata+8) - 24;
PUT_UINT32_LE(tmp, buf);
BIO_write(outdata, buf, 4);
/* u4 reserved2 00000000: 12-15 */
BIO_write(outdata, indata+12, 4);
/* u4 coffFiles - offset of the first CFFILE entry: 16-19 */
tmp = GET_UINT32_LE(indata+16) - 24;
PUT_UINT32_LE(tmp, buf);
BIO_write(outdata, buf, 4);
/*
* u4 reserved3 00000000: 20-23
* u1 versionMinor 03: 24
* u1 versionMajor 01: 25
* u2 cFolders - number of CFFOLDER entries in this cabinet: 26-27
* u2 cFiles - number of CFFILE entries in this cabinet: 28-29
*/
BIO_write(outdata, indata+20, 10);
/* u2 flags: 30-31 */
flags = GET_UINT16_LE(indata+30);
PUT_UINT32_LE(flags & (FLAG_PREV_CABINET | FLAG_NEXT_CABINET), buf);
BIO_write(outdata, buf, 2);
/*
* u2 setID must be the same for all cabinets in a set: 32-33
* u2 iCabinet - number of this cabinet file in a set: 34-35
*/
BIO_write(outdata, indata+32, 4);
i = 60;
cab_optional_names(flags, indata, outdata, &i);
/*
* (u8 * cFolders) CFFOLDER - structure contains information about
* one of the folders or partial folders stored in this cabinet file
*/
nfolders = GET_UINT16_LE(indata + 26);
while (nfolders) {
tmp = GET_UINT32_LE(indata+i);
tmp -= 24;
PUT_UINT32_LE(tmp, buf);
BIO_write(outdata, buf, 4);
BIO_write(outdata, indata+i+4, 4);
i+=8;
nfolders--;
}
/* Write what's left - the compressed data bytes */
BIO_write(outdata, indata + i, filesize - header->siglen - i);
}
static void cab_modify_header(char *indata, FILE_HEADER *header, BIO *hash, BIO *outdata)
{
int i;
unsigned short nfolders;
size_t flags;
static char buf[64*1024];
/* u1 signature[4] 4643534D MSCF: 0-3 */
BIO_write(hash, indata, 4);
/* u4 reserved1 00000000: 4-7 */
BIO_write(outdata, indata+4, 4);
/*
* u4 cbCabinet - size of this cabinet file in bytes: 8-11
* u4 reserved2 00000000: 12-15
* u4 coffFiles - offset of the first CFFILE entry: 16-19
* u4 reserved3 00000000: 20-23
* u1 versionMinor 03: 24
* u1 versionMajor 01: 25
* u2 cFolders - number of CFFOLDER entries in this cabinet: 26-27
* u2 cFiles - number of CFFILE entries in this cabinet: 28-29
*/
BIO_write(hash, indata+8, 22);
/* u2 flags: 30-31 */
flags = GET_UINT16_LE(indata+30);
PUT_UINT32_LE(flags, buf);
BIO_write(hash, buf, 2);
/* u2 setID must be the same for all cabinets in a set: 32-33 */
BIO_write(hash, indata+32, 2);
/*
* u2 iCabinet - number of this cabinet file in a set: 34-35
* u2 cbCFHeader: 36-37
* u1 cbCFFolder: 38
* u1 cbCFData: 39
* u16 abReserve: 40-55
* - Additional data offset: 44-47
* - Additional data size: 48-51
*/
BIO_write(outdata, indata+34, 22);
/* u4 abReserve: 56-59 */
BIO_write(hash, indata+56, 4);
i = 60;
cab_optional_names(flags, indata, hash, &i);
/*
* (u8 * cFolders) CFFOLDER - structure contains information about
* one of the folders or partial folders stored in this cabinet file
*/
nfolders = GET_UINT16_LE(indata + 26);
while (nfolders) {
BIO_write(hash, indata + i, 8);
i += 8;
nfolders--;
}
/* Write what's left - the compressed data bytes */
BIO_write(hash, indata + i, header->sigpos - i);
}
static void cab_add_header(char *indata, FILE_HEADER *header, BIO *hash, BIO *outdata)
{
int i;
unsigned short nfolders;
size_t tmp, flags;
static char buf[64*1024];
u_char cabsigned[] = {
0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00,
0xde, 0xad, 0xbe, 0xef, /* size of cab file */
0xde, 0xad, 0xbe, 0xef, /* size of asn1 blob */
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};
/* u1 signature[4] 4643534D MSCF: 0-3 */
BIO_write(hash, indata, 4);
/* u4 reserved1 00000000: 4-7 */
BIO_write(outdata, indata+4, 4);
/* u4 cbCabinet - size of this cabinet file in bytes: 8-11 */
tmp = GET_UINT32_LE(indata+8) + 24;
PUT_UINT32_LE(tmp, buf);
BIO_write(hash, buf, 4);
/* u4 reserved2 00000000: 12-15 */
BIO_write(hash, indata+12, 4);
/* u4 coffFiles - offset of the first CFFILE entry: 16-19 */
tmp = GET_UINT32_LE(indata+16) + 24;
PUT_UINT32_LE(tmp, buf+4);
BIO_write(hash, buf+4, 4);
/*
* u4 reserved3 00000000: 20-23
* u1 versionMinor 03: 24
* u1 versionMajor 01: 25
* u2 cFolders - number of CFFOLDER entries in this cabinet: 26-27
* u2 cFiles - number of CFFILE entries in this cabinet: 28-29
*/
memcpy(buf+4, indata+20, 10);
flags = GET_UINT16_LE(indata+30);
buf[4+10] = flags | FLAG_RESERVE_PRESENT;
/* u2 setID must be the same for all cabinets in a set: 32-33 */
memcpy(buf+16, indata+32, 2);
BIO_write(hash, buf+4, 14);
/* u2 iCabinet - number of this cabinet file in a set: 34-35 */
BIO_write(outdata, indata+34, 2);
memcpy(cabsigned+8, buf, 4);
BIO_write(outdata, cabsigned, 20);
BIO_write(hash, cabsigned+20, 4);
i = 36;
cab_optional_names(flags, indata, hash, &i);
/*
* (u8 * cFolders) CFFOLDER - structure contains information about
* one of the folders or partial folders stored in this cabinet file
*/
nfolders = GET_UINT16_LE(indata + 26);
while (nfolders) {
tmp = GET_UINT32_LE(indata + i);
tmp += 24;
PUT_UINT32_LE(tmp, buf);
BIO_write(hash, buf, 4);
BIO_write(hash, indata + i + 4, 4);
i += 8;
nfolders--;
}
/* Write what's left - the compressed data bytes */
BIO_write(hash, indata + i, header->fileend - i);
}
static void add_jp_attribute(PKCS7_SIGNER_INFO *si, int jp)
{
ASN1_STRING *astr;
int len;
const u_char *attrs = NULL;
static const u_char java_attrs_low[] = {
0x30, 0x06, 0x03, 0x02, 0x00, 0x01, 0x30, 0x00
};
switch (jp) {
case 0:
attrs = java_attrs_low;
len = sizeof(java_attrs_low);
break;
case 1:
/* XXX */
case 2:
/* XXX */
default:
break;
}
if (attrs) {
astr = ASN1_STRING_new();
ASN1_STRING_set(astr, attrs, len);
PKCS7_add_signed_attribute(si, OBJ_txt2nid(SPC_MS_JAVA_SOMETHING),
V_ASN1_SEQUENCE, astr);
}
}
static void add_purpose_attribute(PKCS7_SIGNER_INFO *si, int comm)
{
ASN1_STRING *astr;
static u_char purpose_ind[] = {
0x30, 0x0c,
0x06, 0x0a, 0x2b, 0x06, 0x01, 0x04, 0x01, 0x82, 0x37, 0x02, 0x01, 0x15
};
static u_char purpose_comm[] = {
0x30, 0x0c,
0x06, 0x0a, 0x2b, 0x06, 0x01, 0x04, 0x01, 0x82, 0x37, 0x02, 0x01, 0x16
};
astr = ASN1_STRING_new();
if (comm) {
ASN1_STRING_set(astr, purpose_comm, sizeof(purpose_comm));
} else {
ASN1_STRING_set(astr, purpose_ind, sizeof(purpose_ind));
}
PKCS7_add_signed_attribute(si, OBJ_txt2nid(SPC_STATEMENT_TYPE_OBJID),
V_ASN1_SEQUENCE, astr);
}
static int add_opus_attribute(PKCS7_SIGNER_INFO *si, char *desc, char *url)
{
SpcSpOpusInfo *opus;
ASN1_STRING *astr;
int len;
u_char *p = NULL;
opus = createOpus(desc, url);
if ((len = i2d_SpcSpOpusInfo(opus, NULL)) <= 0 || (p = OPENSSL_malloc(len)) == NULL) {
SpcSpOpusInfo_free(opus);
return 0; /* FAILED */
}
i2d_SpcSpOpusInfo(opus, &p);
p -= len;
astr = ASN1_STRING_new();
ASN1_STRING_set(astr, p, len);
OPENSSL_free(p);
PKCS7_add_signed_attribute(si, OBJ_txt2nid(SPC_SP_OPUS_INFO_OBJID),
V_ASN1_SEQUENCE, astr);
SpcSpOpusInfo_free(opus);
return 1; /* OK */
}
static PKCS7 *create_new_signature(file_type_t type,
GLOBAL_OPTIONS *options, CRYPTO_PARAMS *cparams)
{
int i;
PKCS7 *sig;
PKCS7_SIGNER_INFO *si;
X509 *signcert;
sig = PKCS7_new();
PKCS7_set_type(sig, NID_pkcs7_signed);
si = NULL;
if (cparams->cert != NULL)
si = PKCS7_add_signature(sig, cparams->cert, cparams->pkey, options->md);
for (i=0; si == NULL && i<sk_X509_num(cparams->certs); i++) {
signcert = sk_X509_value(cparams->certs, i);
/* X509_print_fp(stdout, signcert); */
si = PKCS7_add_signature(sig, signcert, cparams->pkey, options->md);
}
EVP_PKEY_free(cparams->pkey);
cparams->pkey = NULL;
if (si == NULL) {
fprintf(stderr, "PKCS7_add_signature failed\n");
return NULL; /* FAILED */
}
pkcs7_add_signing_time(si, options->signing_time);
PKCS7_add_signed_attribute(si, NID_pkcs9_contentType,
V_ASN1_OBJECT, OBJ_txt2obj(SPC_INDIRECT_DATA_OBJID, 1));
if (type == FILE_TYPE_CAB && options->jp >= 0)
add_jp_attribute(si, options->jp);
add_purpose_attribute(si, options->comm);
if ((options->desc || options->url) &&
!add_opus_attribute(si, options->desc, options->url)) {
fprintf(stderr, "Couldn't allocate memory for opus info\n");
return NULL; /* FAILED */
}
PKCS7_content_new(sig, NID_pkcs7_data);
if (cparams->cert != NULL) {
PKCS7_add_certificate(sig, cparams->cert);
X509_free(cparams->cert);
cparams->cert = NULL;
}
if (cparams->xcerts) {
for(i = sk_X509_num(cparams->xcerts)-1; i>=0; i--)
PKCS7_add_certificate(sig, sk_X509_value(cparams->xcerts, i));
}
for (i = sk_X509_num(cparams->certs)-1; i>=0; i--)
PKCS7_add_certificate(sig, sk_X509_value(cparams->certs, i));
if (cparams->certs) {
sk_X509_free(cparams->certs);
cparams->certs = NULL;
}
if (cparams->xcerts) {
sk_X509_free(cparams->xcerts);
cparams->xcerts = NULL;
}
return sig; /* OK */
}
static int add_unauthenticated_blob(PKCS7 *sig)
{
PKCS7_SIGNER_INFO *si;
ASN1_STRING *astr;
u_char *p = NULL;
int nid, len = 1024+4;
/* Length data for ASN1 attribute plus prefix */
char prefix[] = "\x0c\x82\x04\x00---BEGIN_BLOB---";
char postfix[] = "---END_BLOB---";
si = sk_PKCS7_SIGNER_INFO_value(sig->d.sign->signer_info, 0);
if ((p = OPENSSL_malloc(len)) == NULL)
return 1; /* FAILED */
memset(p, 0, len);
memcpy(p, prefix, sizeof(prefix));
memcpy(p+len-sizeof(postfix), postfix, sizeof(postfix));
astr = ASN1_STRING_new();
ASN1_STRING_set(astr, p, len);
nid = OBJ_create(SPC_UNAUTHENTICATED_DATA_BLOB_OBJID,
"unauthenticatedData", "unauthenticatedData");
PKCS7_add_attribute (si, nid, V_ASN1_SEQUENCE, astr);
OPENSSL_free(p);
return 0; /* OK */
}
/*
* Append signature to the outfile
*/
#ifdef WITH_GSF
static int append_signature(PKCS7 *sig, PKCS7 *cursig, file_type_t type, cmd_type_t cmd,
GLOBAL_OPTIONS *options, size_t *padlen, int *len, BIO *outdata, GSF_PARAMS *gsfparams)
#else
static int append_signature(PKCS7 *sig, PKCS7 *cursig, file_type_t type, cmd_type_t cmd,
GLOBAL_OPTIONS *options, size_t *padlen, int *len, BIO *outdata)
#endif
{
u_char *p = NULL;
static char buf[64*1024];
PKCS7 *outsig = NULL;
if (options->nest) {
if (cursig == NULL) {
fprintf(stderr, "Internal error: No 'cursig' was extracted\n");
return 0; /* FAILED */
}
if (pkcs7_set_nested_signature(cursig, sig, options->signing_time) == 0) {
fprintf(stderr, "Unable to append the nested signature to the current signature\n");
return 0; /* FAILED */
}
outsig = cursig;
} else {
outsig = sig;
}
/* Append signature to outfile */
if (((*len = i2d_PKCS7(outsig, NULL)) <= 0) || (p = OPENSSL_malloc(*len)) == NULL) {
fprintf(stderr, "i2d_PKCS memory allocation failed: %d\n", *len);
return 0; /* FAILED */
}
i2d_PKCS7(outsig, &p);
p -= *len;
*padlen = (8 - *len%8) % 8;
if (type == FILE_TYPE_PE) {
PUT_UINT32_LE(*len + 8 + *padlen, buf);
PUT_UINT16_LE(WIN_CERT_REVISION_2, buf + 4);
PUT_UINT16_LE(WIN_CERT_TYPE_PKCS_SIGNED_DATA, buf + 6);
BIO_write(outdata, buf, 8);
}
if (type == FILE_TYPE_PE || type == FILE_TYPE_CAB) {
BIO_write(outdata, p, *len);
/* pad (with 0's) asn1 blob to 8 byte boundary */
if (*padlen > 0) {
memset(p, 0, *padlen);
BIO_write(outdata, p, *padlen);
}
#ifdef WITH_GSF
} else if (type == FILE_TYPE_MSI) {
/* Only output signatures if we're signing */
if (cmd == CMD_SIGN || cmd == CMD_ADD || cmd == CMD_ATTACH) {
if (!msi_add_DigitalSignature(gsfparams->outole, p, *len)) {
fprintf(stderr, "Failed to write MSI 'DigitalSignature' signature to %s\n", options->infile);
return 0; /* FAILED */
}
if (gsfparams->p_msiex != NULL &&
!msi_add_MsiDigitalSignatureEx(gsfparams->outole, gsfparams)) {
fprintf(stderr, "Failed to write MSI 'MsiDigitalSignatureEx' signature to %s\n", options->infile);
return 0; /* FAILED */
}
}
#endif
}
OPENSSL_free(p);
return 1; /* OK */
}
static void update_data_size(file_type_t type, cmd_type_t cmd, FILE_HEADER *header,
size_t padlen, int len, BIO *outdata)
{
static char buf[64*1024];
if (type == FILE_TYPE_PE) {
if (cmd == CMD_SIGN || cmd == CMD_ADD || cmd == CMD_ATTACH) {
/* Update signature position and size */
(void)BIO_seek(outdata, header->header_size + 152 + header->pe32plus * 16);
PUT_UINT32_LE(header->fileend, buf); /* Previous file end = signature table start */
BIO_write(outdata, buf, 4);
PUT_UINT32_LE(len+8+padlen, buf);
BIO_write(outdata, buf, 4);
}
if (cmd == CMD_SIGN || cmd == CMD_REMOVE || cmd == CMD_ADD || cmd == CMD_ATTACH)
pe_recalc_checksum(outdata, header);
} else if (type == FILE_TYPE_CAB && (cmd == CMD_SIGN || cmd == CMD_ADD || cmd == CMD_ATTACH)) {
/*
* Update additional data size.
* Additional data size is located at offset 0x30 (from file beginning)
* and consist of 4 bytes (little-endian order).
*/
(void)BIO_seek(outdata, 0x30);
PUT_UINT32_LE(len+padlen, buf);
BIO_write(outdata, buf, 4);
}
}
static STACK_OF(X509) *PEM_read_certs_with_pass(BIO *bin, char *certpass)
{
STACK_OF(X509) *certs = sk_X509_new_null();
X509 *x509;
(void)BIO_seek(bin, 0);
while((x509 = PEM_read_bio_X509(bin, NULL, NULL, certpass)))
sk_X509_push(certs, x509);
if (!sk_X509_num(certs)) {
sk_X509_free(certs);
return NULL;
}
return certs;
}
static STACK_OF(X509) *PEM_read_certs(BIO *bin, char *certpass)
{
STACK_OF(X509) *certs = PEM_read_certs_with_pass(bin, certpass);
if (!certs)
certs = PEM_read_certs_with_pass(bin, NULL);
return certs;
}
static off_t get_file_size(const char *infile)
{
int ret;
#ifdef _WIN32
struct _stat st;
ret = _stat(infile, &st);
#else
struct stat st;
ret = stat(infile, &st);
#endif
if (ret) {
fprintf(stderr, "Failed to open file: %s\n", infile);
return 0;
}
if (st.st_size < 4) {
fprintf(stderr, "Unrecognized file type - file is too short: %s\n", infile);
return 0;
}
return st.st_size;
}
static char *map_file(const char *infile, const off_t size)
{
char *indata = NULL;
#ifdef WIN32
HANDLE fh, fm;
fh = CreateFile(infile, GENERIC_READ, FILE_SHARE_READ , NULL, OPEN_EXISTING, 0, NULL);
if (fh == INVALID_HANDLE_VALUE)
return NULL;
fm = CreateFileMapping(fh, NULL, PAGE_READONLY, 0, 0, NULL);
if (fm == NULL)
return NULL;
indata = MapViewOfFile(fm, FILE_MAP_READ, 0, 0, 0);
#else
int fd = open(infile, O_RDONLY);
if (fd < 0)
return NULL;
indata = mmap(0, size, PROT_READ, MAP_PRIVATE, fd, 0);
if (indata == MAP_FAILED)
return NULL;
#endif
return indata;
}
static int input_validation(file_type_t type, GLOBAL_OPTIONS *options, FILE_HEADER *header,
char *indata, size_t filesize)
{
if (type == FILE_TYPE_CAB) {
if (options->pagehash == 1)
fprintf(stderr, "Warning: -ph option is only valid for PE files\n");
#ifdef WITH_GSF
if (options->add_msi_dse == 1)
fprintf(stderr, "Warning: -add-msi-dse option is only valid for MSI files\n");
#endif
if (!cab_verify_header(indata, options->infile, filesize, header)) {
fprintf(stderr, "Corrupt CAB file\n");
return 0; /* FAILED */
}
} else if (type == FILE_TYPE_PE) {
if (options->jp >= 0)
fprintf(stderr, "Warning: -jp option is only valid for CAB files\n");
#ifdef WITH_GSF
if (options->add_msi_dse == 1)
fprintf(stderr, "Warning: -add-msi-dse option is only valid for MSI files\n");
#endif
if (!pe_verify_header(indata, options->infile, filesize, header)) {
fprintf(stderr, "Corrupt PE file\n");
return 0; /* FAILED */
}
} else if (type == FILE_TYPE_MSI) {
if (options->pagehash == 1)
fprintf(stderr, "Warning: -ph option is only valid for PE files\n");
if (options->jp >= 0)
fprintf(stderr, "Warning: -jp option is only valid for CAB files\n");
#ifndef WITH_GSF
fprintf(stderr, "libgsf is not available, msi support is disabled: %s\n", options->infile);
return 0; /* FAILED */
#endif
}
return 1; /* OK */
}
static int check_attached_data(file_type_t type, FILE_HEADER *header, GLOBAL_OPTIONS *options)
{
size_t filesize;
char *outdata;
if (type == FILE_TYPE_PE) {
filesize = get_file_size(options->outfile);
if (!filesize) {
fprintf(stderr, "Error verifying result\n");
return 0; /* FAILED */
}
outdata = map_file(options->outfile, filesize);
if (!outdata) {
fprintf(stderr, "Error verifying result\n");
return 0; /* FAILED */
}
if (!pe_verify_header(outdata, options->outfile, filesize, header)) {
fprintf(stderr, "Corrupt PE file\n");
return 0; /* FAILED */
}
if (pe_verify_file(outdata, header, options)) {
fprintf(stderr, "Signature mismatch\n");
return 0; /* FAILED */
}
} else if (type == FILE_TYPE_CAB) {
filesize = get_file_size(options->outfile);
if (!filesize) {
fprintf(stderr, "Error verifying result\n");
return 0; /* FAILED */
}
outdata = map_file(options->outfile, filesize);
if (!outdata) {
fprintf(stderr, "Error verifying result\n");
return 0; /* FAILED */
}
if (!cab_verify_header(outdata, options->outfile, filesize, header)) {
fprintf(stderr, "Corrupt CAB file\n");
return 0; /* FAILED */
}
if (cab_verify_file(outdata, header, options)) {
fprintf(stderr, "Signature mismatch\n");
return 0; /* FAILED */
}
} else if (type == FILE_TYPE_MSI) {
#ifdef WITH_GSF
GsfInput *src;
GsfInfile *ole;
int ret;
src = gsf_input_stdio_new(options->outfile, NULL);
if (!src) {
fprintf(stderr, "Error opening output file %s\n", options->outfile);
return 0; /* FAILED */
}
ole = gsf_infile_msole_new(src, NULL);
g_object_unref(src);
ret = msi_verify_file(ole, options);
g_object_unref(ole);
if (ret) {
fprintf(stderr, "Signature mismatch\n");
return 0; /* FAILED */
}
#else
fprintf(stderr, "libgsf is not available, msi support is disabled: %s\n", options->infile);
return 0; /* FAILED */
#endif
} else {
fprintf(stderr, "Unknown input type for file: %s\n", options->infile);
return 0; /* FAILED */
}
return 1; /* OK */
}
static int get_file_type(char *indata, char *infile, file_type_t *type)
{
static u_char msi_signature[] = {
0xd0, 0xcf, 0x11, 0xe0, 0xa1, 0xb1, 0x1a, 0xe1
};
if (!memcmp(indata, "MSCF", 4)) {
*type = FILE_TYPE_CAB;
} else if (!memcmp(indata, "MZ", 2)) {
*type = FILE_TYPE_PE;
} else if (!memcmp(indata, msi_signature, sizeof(msi_signature))) {
*type = FILE_TYPE_MSI;
#ifdef WITH_GSF
gsf_init();
gsf_initialized = 1;
#endif
} else {
printf("Unrecognized file type: %s\n", infile);
return 0; /* FAILED */
}
return 1; /* OK */
}
#ifdef PROVIDE_ASKPASS
static char *getpassword(const char *prompt)
{
#ifdef HAVE_TERMIOS_H
struct termios ofl, nfl;
char *p, passbuf[1024];
fputs(prompt, stdout);
tcgetattr(fileno(stdin), &ofl);
nfl = ofl;
nfl.c_lflag &= ~ECHO;
nfl.c_lflag |= ECHONL;
if (tcsetattr(fileno(stdin), TCSANOW, &nfl) != 0) {
fprintf(stderr, "Failed to set terminal attributes\n");
return NULL;
}
p = fgets(passbuf, sizeof(passbuf), stdin);
if (tcsetattr(fileno(stdin), TCSANOW, &ofl) != 0)
fprintf(stderr, "Failed to restore terminal attributes\n");
if (!p) {
fprintf(stderr, "Failed to read password\n");
return NULL;
}
passbuf[strlen(passbuf)-1] = 0x00;
char *pass = strdup(passbuf);
memset(passbuf, 0, sizeof(passbuf));
return pass;
#else
return getpass(prompt);
#endif
}
#endif
static int read_password(GLOBAL_OPTIONS *options)
{
char passbuf[4096];
int passfd, passlen;
if (options->readpass) {
passfd = open(options->readpass, O_RDONLY);
if (passfd < 0) {
fprintf(stderr, "Failed to open password file: %s\n", options->readpass);
return 0; /* FAILED */
}
passlen = read(passfd, passbuf, sizeof(passbuf)-1);
close(passfd);
if (passlen <= 0) {
fprintf(stderr, "Failed to read password from file: %s\n", options->readpass);
return 0; /* FAILED */
}
passbuf[passlen] = 0x00;
options->pass = strdup(passbuf);
memset(passbuf, 0, sizeof(passbuf));
#ifdef PROVIDE_ASKPASS
} else if (options->askpass) {
options->pass = getpassword("Password: ");
#endif
}
return 1; /* OK */
}
static char *read_key(GLOBAL_OPTIONS *options)
{
unsigned char magic[4];
unsigned char pvkhdr[4] = { 0x1e, 0xf1, 0xb5, 0xb0 };
char *pvkfile = NULL;
BIO *btmp;
if (options->keyfile && !options->p11module &&
(btmp = BIO_new_file(options->keyfile, "rb")) != NULL) {
magic[0] = 0x00;
BIO_read(btmp, magic, 4);
if (!memcmp(magic, pvkhdr, 4)) {
pvkfile = options->keyfile;
options->keyfile = NULL;
}
BIO_free(btmp);
return pvkfile;
} else
return NULL;
}
static int read_crypto_params(GLOBAL_OPTIONS *options, CRYPTO_PARAMS *cparams)
{
PKCS12 *p12;
PKCS7 *p7 = NULL, *p7x = NULL;
BIO *btmp;
const int CMD_MANDATORY = 0;
ENGINE *dyn, *pkcs11;
int ret = 1;
/* reset crypto */
memset(cparams, 0, sizeof(CRYPTO_PARAMS));
options->pvkfile = read_key(options);
if (options->pkcs12file != NULL) {
if ((btmp = BIO_new_file(options->pkcs12file, "rb")) == NULL ||
(p12 = d2i_PKCS12_bio(btmp, NULL)) == NULL) {
fprintf(stderr, "Failed to read PKCS#12 file: %s\n", options->pkcs12file);
ret = 0; /* FAILED */
}
BIO_free(btmp);
if (!PKCS12_parse(p12, options->pass ? options->pass : "", &cparams->pkey, &cparams->cert, &cparams->certs)) {
fprintf(stderr, "Failed to parse PKCS#12 file: %s (Wrong password?)\n", options->pkcs12file);
ret = 0; /* FAILED */
}
PKCS12_free(p12);
} else if (options->pvkfile != NULL) {
if ((btmp = BIO_new_file(options->certfile, "rb")) == NULL ||
((p7 = d2i_PKCS7_bio(btmp, NULL)) == NULL &&
(cparams->certs = PEM_read_certs(btmp, "")) == NULL)) {
fprintf(stderr, "Failed to read certificate file: %s\n", options->certfile);
ret = 0; /* FAILED */
}
BIO_free(btmp);
if ((btmp = BIO_new_file(options->pvkfile, "rb")) == NULL ||
((cparams->pkey = b2i_PVK_bio(btmp, NULL, options->pass ? options->pass : "")) == NULL &&
(BIO_seek(btmp, 0) == 0) &&
(cparams->pkey = b2i_PVK_bio(btmp, NULL, NULL)) == NULL)) {
fprintf(stderr, "Failed to read PVK file: %s\n", options->pvkfile);
ret = 0; /* FAILED */
}
BIO_free(btmp);
} else if (options->p11module != NULL) {
if (options->p11engine != NULL) {
ENGINE_load_dynamic();
dyn = ENGINE_by_id("dynamic");
if (!dyn) {
fprintf(stderr, "Failed to load 'dynamic' engine\n");
ret = 0; /* FAILED */
}
if (1 != ENGINE_ctrl_cmd_string(dyn, "SO_PATH", options->p11engine, CMD_MANDATORY)) {
fprintf(stderr, "Failed to set dyn SO_PATH to '%s'\n", options->p11engine);
ret = 0; /* FAILED */
}
if (1 != ENGINE_ctrl_cmd_string(dyn, "ID", "pkcs11", CMD_MANDATORY)) {
fprintf(stderr, "Failed to set dyn ID to 'pkcs11'\n");
ret = 0; /* FAILED */
}
if (1 != ENGINE_ctrl_cmd(dyn, "LIST_ADD", 1, NULL, NULL, CMD_MANDATORY)) {
fprintf(stderr, "Failed to set dyn LIST_ADD to '1'\n");
ret = 0; /* FAILED */
}
if (1 != ENGINE_ctrl_cmd(dyn, "LOAD", 1, NULL, NULL, CMD_MANDATORY)) {
fprintf(stderr, "Failed to set dyn LOAD to '1'\n");
ret = 0; /* FAILED */
}
} else
ENGINE_load_builtin_engines();
pkcs11 = ENGINE_by_id("pkcs11");
if (!pkcs11) {
fprintf(stderr, "Failed to find and load pkcs11 engine\n");
ret = 0; /* FAILED */
}
if (1 != ENGINE_ctrl_cmd_string(pkcs11, "MODULE_PATH", options->p11module, CMD_MANDATORY)) {
fprintf(stderr, "Failed to set pkcs11 engine MODULE_PATH to '%s'\n", options->p11module);
ret = 0; /* FAILED */
}
if (options->pass != NULL &&
1 != ENGINE_ctrl_cmd_string(pkcs11, "PIN", options->pass, CMD_MANDATORY)) {
fprintf(stderr, "Failed to set pkcs11 PIN\n");
ret = 0; /* FAILED */
}
if (1 != ENGINE_init(pkcs11)) {
fprintf(stderr, "Failed to initialized pkcs11 engine\n");
ret = 0; /* FAILED */
}
cparams->pkey = ENGINE_load_private_key(pkcs11, options->keyfile, NULL, NULL);
if (cparams->pkey == NULL) {
fprintf(stderr, "Failed to load private key %s\n", options->keyfile);
ret = 0; /* FAILED */
}
if ((btmp = BIO_new_file(options->certfile, "rb")) == NULL ||
((p7 = d2i_PKCS7_bio(btmp, NULL)) == NULL &&
(cparams->certs = PEM_read_certs(btmp, "")) == NULL)) {
fprintf(stderr, "Failed to read certificate file: %s\n", options->certfile);
ret = 0; /* FAILED */
}
BIO_free(btmp);
} else {
if ((btmp = BIO_new_file(options->certfile, "rb")) == NULL ||
((p7 = d2i_PKCS7_bio(btmp, NULL)) == NULL &&
(cparams->certs = PEM_read_certs(btmp, "")) == NULL)) {
fprintf(stderr, "Failed to read certificate file: %s\n", options->certfile);
ret = 0; /* FAILED */
}
BIO_free(btmp);
if ((btmp = BIO_new_file(options->keyfile, "rb")) == NULL ||
((cparams->pkey = d2i_PrivateKey_bio(btmp, NULL)) == NULL &&
(BIO_seek(btmp, 0) == 0) &&
(cparams->pkey = PEM_read_bio_PrivateKey(btmp, NULL, NULL, options->pass ? options->pass : "")) == NULL &&
(BIO_seek(btmp, 0) == 0) &&
(cparams->pkey = PEM_read_bio_PrivateKey(btmp, NULL, NULL, NULL)) == NULL)) {
fprintf(stderr, "Failed to read private key file: %s (Wrong password?)\n", options->keyfile);
ret = 0; /* FAILED */
}
BIO_free(btmp);
}
if (cparams->certs == NULL && p7 != NULL)
cparams->certs = sk_X509_dup(p7->d.sign->cert);
if (options->xcertfile) {
if ((btmp = BIO_new_file(options->xcertfile, "rb")) == NULL ||
((p7x = d2i_PKCS7_bio(btmp, NULL)) == NULL &&
(cparams->xcerts = PEM_read_certs(btmp, "")) == NULL)) {
fprintf(stderr, "Failed to read cross certificate file: %s\n", options->xcertfile);
ret = 0; /* FAILED */
}
BIO_free(btmp);
PKCS7_free(p7x);
p7x = NULL;
}
if (options->pass) {
memset(options->pass, 0, strlen(options->pass));
options->pass = NULL;
}
return ret; /* OK */
}
static void free_crypto_params(CRYPTO_PARAMS *cparams)
{
if (cparams->pkey)
EVP_PKEY_free(cparams->pkey);
if (cparams->cert)
X509_free(cparams->cert);
if (cparams->certs)
sk_X509_free(cparams->certs);
if (cparams->xcerts)
sk_X509_free(cparams->xcerts);
}
static char *get_cafile(void)
{
const char *sslpart1, *sslpart2;
char *cafile, *openssl_dir, *str_begin, *str_end;
#ifdef CA_BUNDLE_PATH
if (strcmp(CA_BUNDLE_PATH, ""))
return OPENSSL_strdup(CA_BUNDLE_PATH);
#endif
sslpart1 = OpenSSL_version(OPENSSL_DIR);
sslpart2 = "/certs/ca-bundle.crt";
str_begin = strchr(sslpart1, '"');
str_end = strrchr(sslpart1, '"');
if (str_begin && str_end && str_begin < str_end) {
openssl_dir = OPENSSL_strndup(str_begin + 1, str_end - str_begin - 1);
} else {
openssl_dir = OPENSSL_strdup("/etc");
}
cafile = OPENSSL_malloc(strlen(sslpart1) + strlen(sslpart2) + 1);
strcpy(cafile, openssl_dir);
strcat(cafile, sslpart2);
OPENSSL_free(openssl_dir);
return cafile;
}
static PKCS7 *get_sigfile(char *sigfile, file_type_t type)
{
PKCS7 *sig = NULL;
size_t sigfilesize;
char *insigdata;
FILE_HEADER header;
BIO *sigbio;
const char pemhdr[] = "-----BEGIN PKCS7-----";
sigfilesize = get_file_size(sigfile);
if (!sigfilesize) {
fprintf(stderr, "Failed to open file: %s\n", sigfile);
return NULL; /* FAILED */
}
insigdata = map_file(sigfile, sigfilesize);
if (!insigdata) {
fprintf(stderr, "Failed to open file: %s\n", sigfile);
return NULL; /* FAILED */
}
if (sigfilesize >= sizeof(pemhdr) && !memcmp(insigdata, pemhdr, sizeof(pemhdr)-1)) {
sigbio = BIO_new_mem_buf(insigdata, sigfilesize);
sig = PEM_read_bio_PKCS7(sigbio, NULL, NULL, NULL);
BIO_free_all(sigbio);
} else {
/* reset header */
memset(&header, 0, sizeof(FILE_HEADER));
header.fileend = sigfilesize;
if (type == FILE_TYPE_PE) {
if (!pe_verify_header(insigdata, sigfile, sigfilesize, &header))
return NULL; /* FAILED */
sig = pe_extract_existing_pkcs7(insigdata, &header);
if (!sig) {
fprintf(stderr, "Failed to extract PKCS7 data: %s\n", sigfile);
return NULL; /* FAILED */
}
} else if (type == FILE_TYPE_CAB) {
if (!cab_verify_header(insigdata, sigfile, sigfilesize, &header))
return NULL; /* FAILED */
sig = cab_extract_existing_pkcs7(insigdata, &header);
if (!sig) {
fprintf(stderr, "Failed to extract PKCS7 data: %s\n", sigfile);
return NULL; /* FAILED */
}
} else if (type == FILE_TYPE_MSI) {
#ifdef WITH_GSF
const unsigned char *p = (unsigned char*)insigdata;
sig = d2i_PKCS7(NULL, &p, sigfilesize);
#else
fprintf(stderr, "libgsf is not available, msi support is disabled\n");
return NULL; /* FAILED */
#endif
}
}
return sig; /* OK */
}
/*
* Obtain an existing signature or create a new one
*/
static PKCS7 *get_pkcs7(cmd_type_t cmd, BIO *hash, file_type_t type, char *indata,
GLOBAL_OPTIONS *options, FILE_HEADER *header, CRYPTO_PARAMS *cparams)
{
PKCS7 *sig = NULL;
if (cmd == CMD_ATTACH) {
sig = get_sigfile(options->sigfile, type);
if (!sig) {
fprintf(stderr, "Unable to extract valid signature\n");
return NULL; /* FAILED */
}
} else if (cmd == CMD_SIGN) {
sig = create_new_signature(type, options, cparams);
if (!sig) {
fprintf(stderr, "Creating a new signature failed\n");
return NULL; /* FAILED */
}
if (!set_indirect_data_blob(sig, hash, type, indata, options, header)) {
fprintf(stderr, "Signing failed\n");
return NULL; /* FAILED */
}
}
return sig;
}
/*
* Prepare the output file for signing
*/
#ifdef WITH_GSF
static PKCS7 *msi_presign_file(file_type_t type, cmd_type_t cmd, FILE_HEADER *header,
GLOBAL_OPTIONS *options, CRYPTO_PARAMS *cparams, char *indata,
BIO *hash, GsfInfile *ole, GSF_PARAMS *gsfparams, PKCS7 **cursig)
{
PKCS7 *sig = NULL;
if ((cmd == CMD_SIGN && options->nest) ||
(cmd == CMD_ATTACH && options->nest) || cmd == CMD_ADD) {
if (!msi_check_MsiDigitalSignatureEx(ole, options->md))
return NULL; /* FAILED */
*cursig = msi_extract_signature_to_pkcs7(ole);
if (*cursig == NULL) {
fprintf(stderr, "Unable to extract existing signature in -nest mode\n");
return NULL; /* FAILED */
}
if (cmd == CMD_ADD)
sig = *cursig;
}
gsfparams->sink = gsf_output_stdio_new(options->outfile, NULL);
if (!gsfparams->sink) {
fprintf(stderr, "Error opening output file %s\n", options->outfile);
return NULL; /* FAILED */
}
gsfparams->outole = gsf_outfile_msole_new(gsfparams->sink);
BIO_push(hash, BIO_new(BIO_s_null()));
if (options->add_msi_dse) {
gsfparams->p_msiex = malloc(EVP_MAX_MD_SIZE);
if (!msi_calc_MsiDigitalSignatureEx(ole, options->md, hash, gsfparams))
return NULL; /* FAILED */
}
if (!msi_handle_dir(ole, gsfparams->outole, hash)) {
fprintf(stderr, "Unable to msi_handle_dir()\n");
return NULL; /* FAILED */
}
if ((cmd == CMD_ATTACH) || (cmd == CMD_SIGN))
sig = get_pkcs7(cmd, hash, type, indata, options, header, cparams);
return sig; /* OK */
}
#endif
static PKCS7 *pe_presign_file(file_type_t type, cmd_type_t cmd, FILE_HEADER *header,
GLOBAL_OPTIONS *options, CRYPTO_PARAMS *cparams, char *indata,
BIO *hash, BIO *outdata, PKCS7 **cursig)
{
PKCS7 *sig = NULL;
if ((cmd == CMD_SIGN && options->nest) ||
(cmd == CMD_ATTACH && options->nest) || cmd == CMD_ADD) {
*cursig = pe_extract_existing_pkcs7(indata, header);
if (!*cursig) {
fprintf(stderr, "Unable to extract existing signature\n");
return NULL; /* FAILED */
}
if (cmd == CMD_ADD)
sig = *cursig;
}
if (header->sigpos > 0) {
/* Strip current signature */
header->fileend = header->sigpos;
}
pe_modify_header(indata, header, hash, outdata);
if ((cmd == CMD_ATTACH) || (cmd == CMD_SIGN))
sig = get_pkcs7(cmd, hash, type, indata, options, header, cparams);
return sig; /* OK */
}
static PKCS7 *cab_presign_file(file_type_t type, cmd_type_t cmd, FILE_HEADER *header,
GLOBAL_OPTIONS *options, CRYPTO_PARAMS *cparams, char *indata,
BIO *hash, BIO *outdata, PKCS7 **cursig)
{
PKCS7 *sig = NULL;
if ((cmd == CMD_SIGN && options->nest) ||
(cmd == CMD_ATTACH && options->nest) || cmd == CMD_ADD) {
*cursig = cab_extract_existing_pkcs7(indata, header);
if (!*cursig) {
fprintf(stderr, "Unable to extract existing signature\n");
return NULL; /* FAILED */
}
if (cmd == CMD_ADD)
sig = *cursig;
}
if (header->header_size == 20)
/* Strip current signature and modify header */
cab_modify_header(indata, header, hash, outdata);
else
cab_add_header(indata, header, hash, outdata);
if ((cmd == CMD_ATTACH) || (cmd == CMD_SIGN))
sig = get_pkcs7(cmd, hash, type, indata, options, header, cparams);
return sig; /* OK */
}
static cmd_type_t get_command(char **argv)
{
if (!strcmp(argv[1], "--help")) {
printf(PACKAGE_STRING ", using:\n\t%s\n\t%s\n\n",
SSLeay_version(SSLEAY_VERSION),
#ifdef ENABLE_CURL
curl_version()
#else
"no libcurl available"
#endif
);
help_for(argv[0], "all");
} else if (!strcmp(argv[1], "sign"))
return CMD_SIGN;
else if (!strcmp(argv[1], "extract-signature"))
return CMD_EXTRACT;
else if (!strcmp(argv[1], "attach-signature"))
return CMD_ATTACH;
else if (!strcmp(argv[1], "remove-signature"))
return CMD_REMOVE;
else if (!strcmp(argv[1], "verify"))
return CMD_VERIFY;
else if (!strcmp(argv[1], "add"))
return CMD_ADD;
return CMD_SIGN;
}
static void main_configure(int argc, char **argv, cmd_type_t *cmd, GLOBAL_OPTIONS *options)
{
int i;
char *failarg = NULL;
const char *argv0;
argv0 = argv[0];
if (argc > 1) {
*cmd = get_command(argv);
argv++;
argc--;
}
/* reset options */
memset(options, 0, sizeof(GLOBAL_OPTIONS));
options->md = EVP_sha1();
options->signing_time = INVALID_TIME;
options->jp = -1;
if ((*cmd == CMD_VERIFY || *cmd == CMD_ATTACH)) {
options->cafile = get_cafile();
options->untrusted = get_cafile();
}
for (argc--,argv++; argc >= 1; argc--,argv++) {
if (!strcmp(*argv, "-in")) {
if (--argc < 1) usage(argv0, "all");
options->infile = *(++argv);
} else if (!strcmp(*argv, "-out")) {
if (--argc < 1) usage(argv0, "all");
options->outfile = *(++argv);
} else if (!strcmp(*argv, "-sigin")) {
if (--argc < 1) usage(argv0, "all");
options->sigfile = *(++argv);
} else if ((*cmd == CMD_SIGN) && (!strcmp(*argv, "-spc") || !strcmp(*argv, "-certs"))) {
if (--argc < 1) usage(argv0, "all");
options->certfile = *(++argv);
} else if ((*cmd == CMD_SIGN) && !strcmp(*argv, "-ac")) {
if (--argc < 1) usage(argv0, "all");
options->xcertfile = *(++argv);
} else if ((*cmd == CMD_SIGN) && !strcmp(*argv, "-key")) {
if (--argc < 1) usage(argv0, "all");
options->keyfile = *(++argv);
} else if ((*cmd == CMD_SIGN) && !strcmp(*argv, "-pkcs12")) {
if (--argc < 1) usage(argv0, "all");
options->pkcs12file = *(++argv);
} else if ((*cmd == CMD_EXTRACT) && !strcmp(*argv, "-pem")) {
options->output_pkcs7 = 1;
} else if ((*cmd == CMD_SIGN) && !strcmp(*argv, "-pkcs11engine")) {
if (--argc < 1) usage(argv0, "all");
options->p11engine = *(++argv);
} else if ((*cmd == CMD_SIGN) && !strcmp(*argv, "-pkcs11module")) {
if (--argc < 1) usage(argv0, "all");
options->p11module = *(++argv);
} else if ((*cmd == CMD_SIGN) && !strcmp(*argv, "-pass")) {
if (options->askpass || options->readpass) usage(argv0, "all");
if (--argc < 1) usage(argv0, "all");
options->pass = strdup(*(++argv));
memset(*argv, 0, strlen(*argv));
#ifdef PROVIDE_ASKPASS
} else if ((*cmd == CMD_SIGN) && !strcmp(*argv, "-askpass")) {
if (options->pass || options->readpass) usage(argv0, "all");
options->askpass = 1;
#endif
} else if ((*cmd == CMD_SIGN) && !strcmp(*argv, "-readpass")) {
if (options->askpass || options->pass) usage(argv0, "all");
if (--argc < 1) usage(argv0, "all");
options->readpass = *(++argv);
} else if ((*cmd == CMD_SIGN) && !strcmp(*argv, "-comm")) {
options->comm = 1;
} else if ((*cmd == CMD_SIGN) && !strcmp(*argv, "-ph")) {
options->pagehash = 1;
} else if ((*cmd == CMD_SIGN) && !strcmp(*argv, "-n")) {
if (--argc < 1) usage(argv0, "all");
options->desc = *(++argv);
} else if ((*cmd == CMD_SIGN) && !strcmp(*argv, "-h")) {
if (--argc < 1) usage(argv0, "all");
++argv;
if (!strcmp(*argv, "md5")) {
options->md = EVP_md5();
} else if (!strcmp(*argv, "sha1")) {
options->md = EVP_sha1();
} else if (!strcmp(*argv, "sha2") || !strcmp(*argv, "sha256")) {
options->md = EVP_sha256();
} else if (!strcmp(*argv, "sha384")) {
options->md = EVP_sha384();
} else if (!strcmp(*argv, "sha512")) {
options->md = EVP_sha512();
} else {
usage(argv0, "all");
}
} else if ((*cmd == CMD_SIGN) && !strcmp(*argv, "-i")) {
if (--argc < 1) usage(argv0, "all");
options->url = *(++argv);
} else if ((*cmd == CMD_SIGN) && !strcmp(*argv, "-st")) {
if (--argc < 1) usage(argv0, "all");
options->signing_time = (time_t)strtoul(*(++argv), NULL, 10);
#ifdef ENABLE_CURL
} else if ((*cmd == CMD_SIGN || *cmd == CMD_ADD) && !strcmp(*argv, "-t")) {
if (--argc < 1) usage(argv0, "all");
options->turl[options->nturl++] = *(++argv);
} else if ((*cmd == CMD_SIGN || *cmd == CMD_ADD) && !strcmp(*argv, "-ts")) {
if (--argc < 1) usage(argv0, "all");
options->tsurl[options->ntsurl++] = *(++argv);
} else if ((*cmd == CMD_SIGN || *cmd == CMD_ADD) && !strcmp(*argv, "-p")) {
if (--argc < 1) usage(argv0, "all");
options->proxy = *(++argv);
} else if ((*cmd == CMD_SIGN || *cmd == CMD_ADD) && !strcmp(*argv, "-noverifypeer")) {
options->noverifypeer = 1;
#endif
} else if ((*cmd == CMD_SIGN || *cmd == CMD_ADD) && !strcmp(*argv, "-addUnauthenticatedBlob")) {
options->addBlob = 1;
} else if ((*cmd == CMD_SIGN || *cmd == CMD_ATTACH) && !strcmp(*argv, "-nest")) {
options->nest = 1;
} else if ((*cmd == CMD_SIGN || *cmd == CMD_VERIFY) && !strcmp(*argv, "-verbose")) {
options->verbose = 1;
#ifdef WITH_GSF
} else if ((*cmd == CMD_SIGN) && !strcmp(*argv, "-add-msi-dse")) {
options->add_msi_dse = 1;
#endif
} else if ((*cmd == CMD_VERIFY || *cmd == CMD_ATTACH) && !strcmp(*argv, "-CAfile")) {
if (--argc < 1) usage(argv0, "all");
OPENSSL_free(options->cafile);
options->cafile = OPENSSL_strdup(*++argv);
} else if ((*cmd == CMD_VERIFY || *cmd == CMD_ATTACH) && !strcmp(*argv, "-CRLfile")) {
if (--argc < 1) usage(argv0, "all");
options->crlfile = OPENSSL_strdup(*++argv);
} else if ((*cmd == CMD_VERIFY || *cmd == CMD_ATTACH) && !strcmp(*argv, "-untrusted")) {
if (--argc < 1) usage(argv0, "all");
OPENSSL_free(options->untrusted);
options->untrusted = OPENSSL_strdup(*++argv);
} else if ((*cmd == CMD_VERIFY) && !strcmp(*argv, "-require-leaf-hash")) {
if (--argc < 1) usage(argv0, "all");
options->leafhash = (*++argv);
} else if (!strcmp(*argv, "-v") || !strcmp(*argv, "--version")) {
printf(PACKAGE_STRING ", using:\n\t%s\n\t%s\n",
SSLeay_version(SSLEAY_VERSION),
#ifdef ENABLE_CURL
curl_version()
#else
"no libcurl available"
#endif
);
printf(
#ifdef WITH_GSF
"\tlibgsf %d.%d.%d\n",
libgsf_major_version,
libgsf_minor_version,
libgsf_micro_version
#else
"\tno libgsf available\n"
#endif
);
printf("\nPlease send bug-reports to "
PACKAGE_BUGREPORT
"\n");
} else if ((*cmd == CMD_ADD) && !strcmp(*argv, "--help")) {
help_for(argv0, "add");
} else if ((*cmd == CMD_ATTACH) && !strcmp(*argv, "--help")) {
help_for(argv0, "attach-signature");
} else if ((*cmd == CMD_EXTRACT) && !strcmp(*argv, "--help")) {
help_for(argv0, "extract-signature");
} else if ((*cmd == CMD_REMOVE) && !strcmp(*argv, "--help")) {
help_for(argv0, "remove-signature");
} else if ((*cmd == CMD_SIGN) && !strcmp(*argv, "--help")) {
help_for(argv0, "sign");
} else if ((*cmd == CMD_VERIFY) && !strcmp(*argv, "--help")) {
help_for(argv0, "verify");
} else if (!strcmp(*argv, "-jp")) {
char *ap;
if (--argc < 1) usage(argv0, "all");
ap = *(++argv);
for (i=0; ap[i]; i++) ap[i] = tolower((int)ap[i]);
if (!strcmp(ap, "low")) {
options->jp = 0;
} else if (!strcmp(ap, "medium")) {
options->jp = 1;
} else if (!strcmp(ap, "high")) {
options->jp = 2;
}
if (options->jp != 0) usage(argv0, "all"); /* XXX */
} else {
failarg = *argv;
break;
}
}
if (!options->infile && argc > 0) {
options->infile = *(argv++);
argc--;
}
if (*cmd != CMD_VERIFY && (!options->outfile && argc > 0)) {
if (!strcmp(*argv, "-out")) {
argv++;
argc--;
}
if (argc > 0) {
options->outfile = *(argv++);
argc--;
}
}
if (argc > 0 || (options->nturl && options->ntsurl) || !options->infile ||
(*cmd != CMD_VERIFY && !options->outfile) ||
(*cmd == CMD_SIGN && !((options->certfile && options->keyfile) ||
options->pkcs12file || options->p11module))) {
if (failarg)
fprintf(stderr, "Unknown option: %s\n", failarg);
usage(argv0, "all");
}
}
int main(int argc, char **argv)
{
GLOBAL_OPTIONS options;
FILE_HEADER header;
CRYPTO_PARAMS cparams;
#ifdef WITH_GSF
GSF_PARAMS gsfparams;
#endif
BIO *hash = NULL, *outdata = NULL;
PKCS7 *cursig = NULL, *sig = NULL;
char *indata;
int ret = 0, len = 0;
size_t padlen = 0, filesize;
file_type_t type;
cmd_type_t cmd = CMD_SIGN;
/* Set up OpenSSL */
ERR_load_crypto_strings();
OPENSSL_add_all_algorithms_conf();
/* create some MS Authenticode OIDS we need later on */
if (!OBJ_create(SPC_STATEMENT_TYPE_OBJID, NULL, NULL) ||
!OBJ_create(SPC_MS_JAVA_SOMETHING, NULL, NULL) ||
!OBJ_create(SPC_SP_OPUS_INFO_OBJID, NULL, NULL) ||
!OBJ_create(SPC_NESTED_SIGNATURE_OBJID, NULL, NULL))
DO_EXIT_0("Failed to add objects\n");
/* commands and options initialization */
main_configure(argc, argv, &cmd, &options);
if (!read_password(&options))
goto err_cleanup;
/* read key and certificates */
if (cmd == CMD_SIGN && !read_crypto_params(&options, &cparams))
goto err_cleanup;
/* check if indata is cab or pe */
filesize = get_file_size(options.infile);
if (filesize == 0)
goto err_cleanup;
indata = map_file(options.infile, filesize);
if (indata == NULL)
DO_EXIT_1("Failed to open file: %s\n", options.infile);
/* reset file header */
memset(&header, 0, sizeof(FILE_HEADER));
header.fileend = filesize;
#ifdef WITH_GSF
/* reset Gsf parameters */
memset(&gsfparams, 0, sizeof(GSF_PARAMS));
#endif /* WITH_GSF */
if (!get_file_type(indata, options.infile, &type))
goto err_cleanup;
hash = BIO_new(BIO_f_md());
BIO_set_md(hash, options.md);
if (!input_validation(type, &options, &header, indata, filesize))
goto err_cleanup;
#ifdef WITH_GSF
if (type == FILE_TYPE_MSI) {
GsfInput *src;
GsfInfile *ole;
src = gsf_input_stdio_new(options.infile, NULL);
if (!src)
DO_EXIT_1("Error opening file %s\n", options.infile);
ole = gsf_infile_msole_new(src, NULL);
if (cmd == CMD_EXTRACT) {
ret = msi_extract_file(ole, &options);
goto skip_signing;
} else if (cmd == CMD_VERIFY) {
ret = msi_verify_file(ole, &options);
goto skip_signing;
} else {
sig = msi_presign_file(type, cmd, &header, &options, &cparams, indata,
hash, ole, &gsfparams, &cursig);
if (cmd == CMD_REMOVE) {
gsf_output_close(GSF_OUTPUT(gsfparams.outole));
g_object_unref(gsfparams.sink);
goto skip_signing;
} else if (!sig)
goto err_cleanup;
}
}
#endif /* WITH_GSF */
if ((type == FILE_TYPE_CAB || type == FILE_TYPE_PE) && (cmd != CMD_VERIFY)) {
/* Create outdata file */
outdata = BIO_new_file(options.outfile, "w+bx");
if (outdata == NULL)
DO_EXIT_1("Failed to create file: %s\n", options.outfile);
BIO_push(hash, outdata);
}
if (type == FILE_TYPE_CAB) {
if (!(header.flags & FLAG_RESERVE_PRESENT) &&
(cmd == CMD_REMOVE || cmd == CMD_EXTRACT)) {
DO_EXIT_1("CAB file does not have any signature: %s\n", options.infile);
} else if (cmd == CMD_EXTRACT) {
ret = cab_extract_file(indata, &header, outdata, options.output_pkcs7);
goto skip_signing;
} else if (cmd == CMD_REMOVE) {
cab_remove_file(indata, &header, filesize, outdata);
goto skip_signing;
} else if (cmd == CMD_VERIFY) {
ret = cab_verify_file(indata, &header, &options);
goto skip_signing;
} else {
sig = cab_presign_file(type, cmd, &header, &options, &cparams, indata,
hash, outdata, &cursig);
if (!sig)
goto err_cleanup;
}
} else if (type == FILE_TYPE_PE) {
if ((cmd == CMD_REMOVE || cmd == CMD_EXTRACT) && header.sigpos == 0) {
DO_EXIT_1("PE file does not have any signature: %s\n", options.infile);
} else if (cmd == CMD_EXTRACT) {
ret = pe_extract_file(indata, &header, outdata, options.output_pkcs7);
goto skip_signing;
} else if (cmd == CMD_VERIFY) {
ret = pe_verify_file(indata, &header, &options);
goto skip_signing;
} else {
sig = pe_presign_file(type, cmd, &header, &options, &cparams, indata,
hash, outdata, &cursig);
if (cmd == CMD_REMOVE)
goto skip_signing;
else if (!sig)
goto err_cleanup;
}
}
#ifdef ENABLE_CURL
/* add counter-signature/timestamp */
if (options.nturl && add_timestamp_authenticode(sig, &options))
DO_EXIT_0("Authenticode timestamping failed\n");
if (options.ntsurl && add_timestamp_rfc3161(sig, &options))
DO_EXIT_0("RFC 3161 timestamping failed\n");
#endif /* ENABLE_CURL */
if (options.addBlob && add_unauthenticated_blob(sig))
DO_EXIT_0("Adding unauthenticated blob failed\n");
#if 0
if (!PEM_write_PKCS7(stdout, sig))
DO_EXIT_0("PKCS7 output failed\n");
#endif
#ifdef WITH_GSF
if (!append_signature(sig, cursig, type, cmd, &options, &padlen, &len, outdata,
&gsfparams))
DO_EXIT_0("Append signature to outfile failed\n");
if (type == FILE_TYPE_MSI) {
gsf_output_close(GSF_OUTPUT(gsfparams.outole));
g_object_unref(gsfparams.sink);
}
#else
if (!append_signature(sig, cursig, type, cmd, &options, &padlen, &len, outdata))
DO_EXIT_0("Append signature to outfile failed\n");
#endif /* WITH_GSF */
PKCS7_free(sig);
skip_signing:
update_data_size(type, cmd, &header, padlen, len, outdata);
BIO_free_all(hash);
hash = outdata = NULL;
if (cmd == CMD_ATTACH) {
if (check_attached_data(type, &header, &options))
printf("Signature successfully attached\n");
else
goto err_cleanup;
} else
printf(ret ? "Failed\n" : "Succeeded\n");
OPENSSL_free(options.cafile);
OPENSSL_free(options.untrusted);
if (options.crlfile)
OPENSSL_free(options.crlfile);
cleanup_lib_state();
return ret;
err_cleanup:
ERR_print_errors_fp(stderr);
free_crypto_params(&cparams);
if (hash)
BIO_free_all(hash);
if (outdata)
unlink(options.outfile);
fprintf(stderr, "\nFailed\n");
cleanup_lib_state();
return -1;
}
/*
Local Variables:
c-basic-offset: 4
tab-width: 4
indent-tabs-mode: t
End:
vim: set ts=4 noexpandtab:
*/
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