/* OpenSSL based Authenticode signing for PE/MSI/Java CAB files. Copyright (C) 2005-2015 Per Allansson Copyright (C) 2018-2020 Michał Trojnara 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 . 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: http://www.cs.auckland.ac.nz/~pgut001/pubs/authenticode.txt * MS CAB SDK documentation http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dncabsdk/html/cabdl.asp * MS PE/COFF documentation http://www.microsoft.com/whdc/system/platform/firmware/PECOFF.mspx * 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 #ifdef HAVE_WINDOWS_H #define NOCRYPT #define WIN32_LEAN_AND_MEAN #include typedef unsigned char u_char; #endif #include #include #include #ifndef _WIN32 #include #endif #include #include #include #include #include #include #ifndef _WIN32 #ifdef HAVE_SYS_MMAN_H #include #endif #ifdef HAVE_TERMIOS_H #include #endif #endif #ifdef WITH_GSF #include #include #include #include #include #include #include #endif #include #include #include #include #include /* X509_PURPOSE_CRL_SIGN */ #include #include #include #include #include #ifndef OPENSSL_NO_ENGINE #include #endif #ifdef ENABLE_CURL #ifdef __CYGWIN__ #ifndef SOCKET #define SOCKET UINT_PTR #endif #endif #include #define MAX_TS_SERVERS 256 #endif #ifndef FALSE #define FALSE 0 #endif #ifndef TRUE #define TRUE 1 #endif #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 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; /* 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 == (time_t)-1) /* -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; id.sign->signer_info, 0); p = OPENSSL_malloc(len); memset(p, 0, len); memcpy(p, prefix, sizeof(prefix)); memcpy(p+len-sizeof(postfix), postfix, sizeof(postfix)); ASN1_STRING *astr = ASN1_STRING_new(); ASN1_STRING_set(astr, p, len); int nid = OBJ_create(SPC_UNAUTHENTICATED_DATA_BLOB_OBJID, "unauthenticatedData", "unauthenticatedData"); PKCS7_add_attribute (si, nid, V_ASN1_SEQUENCE, astr); OPENSSL_free(p); return 0; } static int g_verbose = 0; #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 HTTP/1.1 Content-Type: application/octet-stream Content-Length: ... Accept: application/octet-stream User-Agent: Transport Host: ... Cache-Control: no-cache .. 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 .. 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\n", curl_easy_strerror(c)); } 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, char **url, int nurls, char *proxy, int noverifypeer) { int i; for (i=0; i -key | -pkcs12 |\n", ""); printf("%12s [ -pkcs11engine ] -pkcs11module -certs -key )\n", ""); printf("%12s[ -pass ", ""); #ifdef PROVIDE_ASKPASS printf("%1s [ -askpass ]", ""); #endif printf("%1s[ -readpass ]\n", ""); printf("%12s[ -ac ]\n", ""); printf("%12s[ -h {md5,sha1,sha2(56),sha384,sha512} ]\n", ""); printf("%12s[ -n ] [ -i ] [ -jp ] [ -comm ]\n", ""); printf("%12s[ -ph ]\n", ""); #ifdef ENABLE_CURL printf("%12s[ -t [ -t ... ] [ -p ] [ -noverifypeer ]\n", ""); printf("%12s[ -ts [ -ts ... ] [ -p ] [ -noverifypeer ] ]\n", ""); #endif printf("%12s[ -st ]\n", ""); printf("%12s[ -addUnauthenticatedBlob ]\n", ""); printf("%12s[ -nest ]\n", ""); printf("%12s[ -verbose ]\n", ""); #ifdef WITH_GSF printf("%12s[ -add-msi-dse ]\n", ""); #endif printf("%12s[ -in ] [-out ] \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 [ -t ... ] [ -p ] [ -noverifypeer ]\n", ""); printf("%12s[ -ts [ -ts ... ] [ -p ] [ -noverifypeer ] ]\n", ""); #endif printf("%12s[ -in ] [ -out ] \n\n", ""); } const char *cmds_attach[] = {"all", "attach-signature", NULL}; if (on_list(cmd, cmds_attach)) { printf("%1sattach-signature [ -sigin ] \n", ""); printf("%12s[ -CAfile ]\n", ""); printf("%12s[ -CRLfile ]\n", ""); printf("%12s[ -untrusted ]\n", ""); printf("%12s[ -nest ]\n", ""); printf("%12s[ -in ] [ -out ] \n\n", ""); } const char *cmds_extract[] = {"all", "extract-signature", NULL}; if (on_list(cmd, cmds_extract)) { printf("%1sextract-signature [ -pem ]\n", ""); printf("%12s[ -in ] [ -out ] \n\n", ""); } const char *cmds_remove[] = {"all", "remove-signature", NULL}; if (on_list(cmd, cmds_remove)) printf("%1sremove-signature [ -in ] [ -out ] \n\n", ""); const char *cmds_verify[] = {"all", "verify", NULL}; if (on_list(cmd, cmds_verify)) { printf("%1sverify [ -in ] \n", ""); printf("%12s[ -CAfile ]\n", ""); printf("%12s[ -CRLfile ]\n", ""); printf("%12s[ -untrusted ]\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 --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 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 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 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 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 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 *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; itype = 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); SpcAttributeTypeAndOptionalValue *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); ASN1_TYPE *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); SpcSerializedObject *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); SpcLink *link = SpcLink_new(); link->type = 1; link->value.moniker = so; return link; } static void get_indirect_data_blob(u_char **blob, int *len, const EVP_MD *md, file_type_t type, int pagehash, char *indata, size_t header_size, int pe32plus, size_t sigpos) { static const unsigned char msistr[] = { 0xf1, 0x10, 0x0c, 0x00, 0x00, 0x00, 0x00, 0x00, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x46 }; u_char *p; int hashlen, l; void *hash; ASN1_OBJECT *dtype; SpcIndirectDataContent *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) { SpcLink *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) { SpcPeImageData *pid = SpcPeImageData_new(); ASN1_BIT_STRING_set(pid->flags, (unsigned char*)"0", 0); if (pagehash) { int phtype = NID_sha1; if (EVP_MD_size(md) > EVP_MD_size(EVP_sha1())) phtype = NID_sha256; pid->file = get_page_hash_link(phtype, indata, header_size, pe32plus, sigpos); } 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) { SpcSipInfo *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(md)); idc->messageDigest->digestAlgorithm->parameters = ASN1_TYPE_new(); idc->messageDigest->digestAlgorithm->parameters->type = V_ASN1_NULL; hashlen = EVP_MD_size(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); } static unsigned int calc_pe_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 recalc_pe_checksum(BIO *bio, FILE_HEADER *header) { unsigned int checkSum = calc_pe_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_signers(PKCS7 *p7, char *leafhash, int *leafok) { STACK_OF(X509) *signers; X509 *cert; int i, count; /* retrieve the signer's certificates from p7 */ signers = PKCS7_get0_signers(p7, NULL, 0); if (signers == NULL) return 0; /* FAILED */ count = sk_X509_num(signers); printf("Number of signers: %d\n", count); for (i=0; id.sign->cert); printf("\nNumber of certificates: %d\n", count); for (i=0; id.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; iversion; 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) { 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; idata, 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 (g_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, char *untrusted) { X509_STORE *store = NULL; PKCS7_SIGNER_INFO *si; int ret = 0, verok; printf("TSA's certificates file: %s\n", untrusted); store = X509_STORE_new(); if (!load_file_lookup(store, untrusted, NULL, X509_PURPOSE_TIMESTAMP_SIGN)) { printf("\nUse the \"-untrusted\" option to add the CA cert bundle to verify timestamp server.\n"); ret = 1; /* FAILED */ } verok = PKCS7_verify(tmstamp_p7, tmstamp_p7->d.sign->cert, store, 0, NULL, 0); printf("\nTimestamp Server Signature verification: %s\n", verok ? "ok" : "failed"); if (!verok) { ERR_print_errors_fp(stdout); ret = 1; /* 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 = 1; /* FAILED */ } X509_STORE_free(store); return ret; } static int verify_authenticode(PKCS7 *p7, ASN1_UTCTIME *timestamp_time, char *cafile, char *crlfile) { X509_STORE *store = NULL; int ret = 0, verok; size_t seqhdrlen; BIO *bio = NULL; int day, sec; time_t time; store = X509_STORE_new(); if (!load_file_lookup(store, cafile, crlfile, X509_PURPOSE_CRL_SIGN)) { fprintf(stderr, "Failed to add store lookup file\n"); ret = 1; /* FAILED */ } if (timestamp_time != NULL) { 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 */ } } 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); verok = PKCS7_verify(p7, p7->d.sign->cert, store, bio, NULL, 0); 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, char *leafhash, char *cafile, char *crlfile, char *untrusted) { PKCS7 *tmstamp_p7 = NULL; ASN1_UTCTIME *timestamp_time = NULL; int ret = 0, leafok = 0; if (!find_signers(p7, 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, ×tamp_time)) ret = 1; /* FAILED */ if (leafhash != NULL) { printf("Leaf hash match: %s\n", leafok ? "ok" : "failed"); if (!leafok) ret = 1; /* FAILED */ } printf("\nCAfile: %s\n", cafile); if (crlfile) printf("CRLfile: %s\n", crlfile); if (tmstamp_p7) ret |= verify_timestamp(p7, tmstamp_p7, untrusted); else printf("\nFile is not timestamped\n"); if (ret == 1) timestamp_time = NULL; ret |= verify_authenticode(p7, timestamp_time, cafile, crlfile); 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, char *leafhash, int allownest, char *cafile, char *crlfile, char *untrusted) { 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]; ASN1_OBJECT *indir_objid = OBJ_txt2obj(SPC_INDIRECT_DATA_OBJID, 1); if (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_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); } ASN1_OBJECT_free(indir_objid); } 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(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, leafhash, cafile, crlfile, untrusted); 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, leafhash, 0, cafile, crlfile, untrusted); if (ret == 0) 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, char *leafhash, char *cafile, char *crlfile, char *untrusted) { 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, leafhash, 1, cafile, crlfile, untrusted); 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, char *outfile, int output_pkcs7) { int ret = 0; BIO *outdata; PKCS7 *sig; if (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(outfile, "w+bx"); if (outdata == NULL) { fprintf(stderr, "Unable to create %s\n", outfile); return 1; /* FAILED */ } ret = !PEM_write_bio_PKCS7(outdata, sig); BIO_free_all(outdata); } else { ret = msi_extract_signature_to_file(ole, 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, u_char *p_msiex, int *len_msiex) { 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 */ } *len_msiex = BIO_gets(prehash, (char*)p_msiex, EVP_MAX_MD_SIZE); BIO_write(hash, p_msiex, *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, u_char *p_msiex, int len_msiex) { GsfOutput *child; int ret = 1; child = gsf_outfile_new_child(outole, "\05MsiDigitalSignatureEx", FALSE); if (!gsf_output_write(child, len_msiex, p_msiex)) ret = 0; gsf_output_close(child); return ret; } /* * PE file support */ static void calc_pe_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 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 verify_pe_pkcs7(PKCS7 *p7, char *indata, FILE_HEADER *header, char *leafhash, int allownest, char *cafile, char *crlfile, char *untrusted) { 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; ASN1_OBJECT *indir_objid = OBJ_txt2obj(SPC_INDIRECT_DATA_OBJID, 1); if (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_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) { 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); } } ASN1_OBJECT_free(indir_objid); 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); calc_pe_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 = calc_page_hash(indata, header->header_size, header->pe32plus, header->sigpos, phtype, &phlen); tohex(cph, hexbuf, (cphlen < 32) ? cphlen : 32); printf("Calculated page hash : %s ...%s\n\n", hexbuf, ((phlen != cphlen) || memcmp(ph, cph, phlen)) ? " MISMATCH!!!":""); OPENSSL_free(ph); OPENSSL_free(cph); } ret |= verify_pkcs7(p7, leafhash, cafile, crlfile, untrusted); printf("\n"); if (allownest) { int has_sig = 0; PKCS7 *p7nest = pkcs7_get_nested_signature(p7, &has_sig); if (p7nest) { int nest_ret = verify_pe_pkcs7(p7nest, indata, header, leafhash, 0, cafile, crlfile, untrusted); if (ret == 0) ret = nest_ret; PKCS7_free(p7nest); } else if (!p7nest && has_sig) { printf("Failed to decode nested signature!\n"); ret = 1; } } return ret; } /* * extract_existing_pe_pkcs7 retrieves a decoded PKCS7 struct * corresponding to the existing signature of the PE file. */ static PKCS7 *extract_existing_pe_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 verify_pe_file(char *indata, FILE_HEADER *header, char *leafhash, char *cafile, char *crlfile, char *untrusted) { 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 = calc_pe_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 = extract_existing_pe_pkcs7(indata, header); if (!p7) { printf("Failed to extract PKCS7 data\n\n"); return -1; } ret = verify_pe_pkcs7(p7, indata, header, leafhash, 1, cafile, crlfile, untrusted); PKCS7_free(p7); return ret; } static int extract_pe_file(char *indata, FILE_HEADER *header, BIO *outdata, int output_pkcs7) { int ret = 0; PKCS7 *sig; (void)BIO_reset(outdata); if (output_pkcs7) { sig = extract_existing_pe_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 verify_pe_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 modify_pe_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 verify_cab_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 calc_cab_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 verify_cab_pkcs7(PKCS7 *p7, char *indata, FILE_HEADER *header, char *leafhash, int allownest, char *cafile, char *crlfile, char *untrusted) { 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; ASN1_OBJECT *indir_objid = OBJ_txt2obj(SPC_INDIRECT_DATA_OBJID, 1); if (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_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) { 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); } } ASN1_OBJECT_free(indir_objid); 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 |= calc_cab_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, leafhash, cafile, crlfile, untrusted); printf("\n"); if (allownest) { int has_sig = 0; PKCS7 *p7nest = pkcs7_get_nested_signature(p7, &has_sig); if (p7nest) { int nest_ret = verify_cab_pkcs7(p7nest, indata, header, leafhash, 0, cafile, crlfile, untrusted); if (ret == 0) ret = nest_ret; PKCS7_free(p7nest); } else if (!p7nest && has_sig) { printf("Failed to decode nested signature!\n"); ret = 1; } } return ret; } static PKCS7 *extract_existing_cab_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 verify_cab_file(char *indata, FILE_HEADER *header, char *leafhash, char *cafile, char *crlfile, char *untrusted) { PKCS7 *p7; int ret = 0; if (header->header_size != 20) { printf("No signature found\n\n"); return 1; /* FAILED */ } p7 = extract_existing_cab_pkcs7(indata, header); if (!p7) { printf("Failed to extract PKCS7 data\n\n"); return -1; /* FAILED */ } ret |= verify_cab_pkcs7(p7, indata, header, leafhash, 1, cafile, crlfile, untrusted); PKCS7_free(p7); return ret; } static int extract_cab_file(char *indata, FILE_HEADER *header, BIO *outdata, int output_pkcs7) { int ret = 0; PKCS7 *sig; (void)BIO_reset(outdata); if (output_pkcs7) { sig = extract_existing_cab_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 write_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 remove_cab_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; write_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 modify_cab_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; write_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 add_cab_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; write_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 int set_signing_bob(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) return 0; /* FAILED */ BIO_write(sigbio, buf+seqhdrlen, len-seqhdrlen+mdlen); (void)BIO_flush(sigbio); if (!PKCS7_dataFinal(sig, sigbio)) 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); return 0; /* FAILED */ } return 1; /* OK */ } 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; } #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 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 *attach_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 */ } /* reset header */ memset(&header, 0, sizeof(FILE_HEADER)); header.fileend = sigfilesize; 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 { if (type == FILE_TYPE_PE) { if (!verify_pe_header(insigdata, sigfile, sigfilesize, &header)) return NULL; /* FAILED */ sig = extract_existing_pe_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 (!verify_cab_header(insigdata, sigfile, sigfilesize, &header)) return NULL; /* FAILED */ sig = extract_existing_cab_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 */ } int main(int argc, char **argv) { BIO *btmp, *hash, *outdata; PKCS12 *p12; PKCS7 *p7 = NULL, *cursig = NULL, *outsig = NULL, *sig = NULL, *p7x = NULL; X509 *cert = NULL; STACK_OF(X509) *certs = NULL, *xcerts = NULL; EVP_PKEY *pkey = NULL; PKCS7_SIGNER_INFO *si; const EVP_MD *md; time_t signing_time = (time_t)-1; const char *argv0 = argv[0]; static char buf[64*1024]; char *xcertfile, *certfile, *keyfile, *pvkfile, *pkcs12file, *infile, *outfile, *sigfile, *desc, *url, *indata, *outdataverify; char *p11engine, *p11module; char *pass = NULL, *readpass = NULL; int output_pkcs7 = 0; int askpass = 0; char *cafile = NULL; char *crlfile = NULL; char *untrusted = NULL; char *leafhash = NULL; #ifdef ENABLE_CURL char *turl[MAX_TS_SERVERS], *proxy = NULL, *tsurl[MAX_TS_SERVERS]; int noverifypeer = 0; #endif int nest = 0; #ifdef WITH_GSF int add_msi_dse = 0; #endif int nturl = 0, ntsurl = 0; int addBlob = 0; u_char *p = NULL; int ret = 0, i, len = 0, jp = -1, comm = 0, pagehash = 0; FILE_HEADER header; size_t padlen = 0; size_t filesize, outdatasize; file_type_t type; cmd_type_t cmd = CMD_SIGN; char *failarg = NULL; static u_char msi_signature[] = { 0xd0, 0xcf, 0x11, 0xe0, 0xa1, 0xb1, 0x1a, 0xe1 }; #ifdef WITH_GSF GsfOutfile *outole = NULL; GsfOutput *sink = NULL; u_char *p_msiex = NULL; int len_msiex = 0; #endif xcertfile = certfile = keyfile = pvkfile = pkcs12file = p11module = p11engine = infile = outfile = sigfile = desc = url = NULL; hash = outdata = NULL; /* 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"); md = EVP_sha1(); if (argc > 1) { 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(argv0, "all"); } else if (!strcmp(argv[1], "sign")) { cmd = CMD_SIGN; argv++; argc--; } else if (!strcmp(argv[1], "extract-signature")) { cmd = CMD_EXTRACT; argv++; argc--; } else if (!strcmp(argv[1], "attach-signature")) { cmd = CMD_ATTACH; argv++; argc--; } else if (!strcmp(argv[1], "remove-signature")) { cmd = CMD_REMOVE; argv++; argc--; } else if (!strcmp(argv[1], "verify")) { cmd = CMD_VERIFY; argv++; argc--; } else if (!strcmp(argv[1], "add")) { cmd = CMD_ADD; argv++; argc--; } } if ((cmd == CMD_VERIFY || cmd == CMD_ATTACH)) { cafile = get_cafile(); untrusted = get_cafile(); } for (argc--,argv++; argc >= 1; argc--,argv++) { if (!strcmp(*argv, "-in")) { if (--argc < 1) usage(argv0, "all"); infile = *(++argv); } else if (!strcmp(*argv, "-out")) { if (--argc < 1) usage(argv0, "all"); outfile = *(++argv); } else if (!strcmp(*argv, "-sigin")) { if (--argc < 1) usage(argv0, "all"); sigfile = *(++argv); } else if ((cmd == CMD_SIGN) && (!strcmp(*argv, "-spc") || !strcmp(*argv, "-certs"))) { if (--argc < 1) usage(argv0, "all"); certfile = *(++argv); } else if ((cmd == CMD_SIGN) && !strcmp(*argv, "-ac")) { if (--argc < 1) usage(argv0, "all"); xcertfile = *(++argv); } else if ((cmd == CMD_SIGN) && !strcmp(*argv, "-key")) { if (--argc < 1) usage(argv0, "all"); keyfile = *(++argv); } else if ((cmd == CMD_SIGN) && !strcmp(*argv, "-pkcs12")) { if (--argc < 1) usage(argv0, "all"); pkcs12file = *(++argv); } else if ((cmd == CMD_EXTRACT) && !strcmp(*argv, "-pem")) { output_pkcs7 = 1; } else if ((cmd == CMD_SIGN) && !strcmp(*argv, "-pkcs11engine")) { if (--argc < 1) usage(argv0, "all"); p11engine = *(++argv); } else if ((cmd == CMD_SIGN) && !strcmp(*argv, "-pkcs11module")) { if (--argc < 1) usage(argv0, "all"); p11module = *(++argv); } else if ((cmd == CMD_SIGN) && !strcmp(*argv, "-pass")) { if (askpass || readpass) usage(argv0, "all"); if (--argc < 1) usage(argv0, "all"); pass = strdup(*(++argv)); memset(*argv, 0, strlen(*argv)); #ifdef PROVIDE_ASKPASS } else if ((cmd == CMD_SIGN) && !strcmp(*argv, "-askpass")) { if (pass || readpass) usage(argv0, "all"); askpass = 1; #endif } else if ((cmd == CMD_SIGN) && !strcmp(*argv, "-readpass")) { if (askpass || pass) usage(argv0, "all"); if (--argc < 1) usage(argv0, "all"); readpass = *(++argv); } else if ((cmd == CMD_SIGN) && !strcmp(*argv, "-comm")) { comm = 1; } else if ((cmd == CMD_SIGN) && !strcmp(*argv, "-ph")) { pagehash = 1; } else if ((cmd == CMD_SIGN) && !strcmp(*argv, "-n")) { if (--argc < 1) usage(argv0, "all"); desc = *(++argv); } else if ((cmd == CMD_SIGN) && !strcmp(*argv, "-h")) { if (--argc < 1) usage(argv0, "all"); ++argv; if (!strcmp(*argv, "md5")) { md = EVP_md5(); } else if (!strcmp(*argv, "sha1")) { md = EVP_sha1(); } else if (!strcmp(*argv, "sha2") || !strcmp(*argv, "sha256")) { md = EVP_sha256(); } else if (!strcmp(*argv, "sha384")) { md = EVP_sha384(); } else if (!strcmp(*argv, "sha512")) { md = EVP_sha512(); } else { usage(argv0, "all"); } } else if ((cmd == CMD_SIGN) && !strcmp(*argv, "-i")) { if (--argc < 1) usage(argv0, "all"); url = *(++argv); } else if ((cmd == CMD_SIGN) && !strcmp(*argv, "-st")) { if (--argc < 1) usage(argv0, "all"); 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"); turl[nturl++] = *(++argv); } else if ((cmd == CMD_SIGN || cmd == CMD_ADD) && !strcmp(*argv, "-ts")) { if (--argc < 1) usage(argv0, "all"); tsurl[ntsurl++] = *(++argv); } else if ((cmd == CMD_SIGN || cmd == CMD_ADD) && !strcmp(*argv, "-p")) { if (--argc < 1) usage(argv0, "all"); proxy = *(++argv); } else if ((cmd == CMD_SIGN || cmd == CMD_ADD) && !strcmp(*argv, "-noverifypeer")) { noverifypeer = 1; #endif } else if ((cmd == CMD_SIGN || cmd == CMD_ADD) && !strcmp(*argv, "-addUnauthenticatedBlob")) { addBlob = 1; } else if ((cmd == CMD_SIGN || cmd == CMD_ATTACH) && !strcmp(*argv, "-nest")) { nest = 1; } else if ((cmd == CMD_SIGN || cmd == CMD_VERIFY) && !strcmp(*argv, "-verbose")) { g_verbose = 1; #ifdef WITH_GSF } else if ((cmd == CMD_SIGN) && !strcmp(*argv, "-add-msi-dse")) { add_msi_dse = 1; #endif } else if ((cmd == CMD_VERIFY || cmd == CMD_ATTACH) && !strcmp(*argv, "-CAfile")) { if (--argc < 1) usage(argv0, "all"); OPENSSL_free(cafile); cafile = OPENSSL_strdup(*++argv); } else if ((cmd == CMD_VERIFY || cmd == CMD_ATTACH) && !strcmp(*argv, "-CRLfile")) { if (--argc < 1) usage(argv0, "all"); crlfile = OPENSSL_strdup(*++argv); } else if ((cmd == CMD_VERIFY || cmd == CMD_ATTACH) && !strcmp(*argv, "-untrusted")) { if (--argc < 1) usage(argv0, "all"); OPENSSL_free(untrusted); untrusted = OPENSSL_strdup(*++argv); } else if ((cmd == CMD_VERIFY) && !strcmp(*argv, "-require-leaf-hash")) { if (--argc < 1) usage(argv0, "all"); 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")) { jp = 0; } else if (!strcmp(ap, "medium")) { jp = 1; } else if (!strcmp(ap, "high")) { jp = 2; } if (jp != 0) usage(argv0, "all"); /* XXX */ } else { failarg = *argv; break; } } if (!infile && argc > 0) { infile = *(argv++); argc--; } if (cmd != CMD_VERIFY && (!outfile && argc > 0)) { if (!strcmp(*argv, "-out")) { argv++; argc--; } if (argc > 0) { outfile = *(argv++); argc--; } } if (argc > 0 || (nturl && ntsurl) || !infile || (cmd != CMD_VERIFY && !outfile) || (cmd == CMD_SIGN && !((certfile && keyfile) || pkcs12file || p11module))) { if (failarg) fprintf(stderr, "Unknown option: %s\n", failarg); usage(argv0, "all"); } if (readpass) { char passbuf[4096]; int passfd = open(readpass, O_RDONLY); if (passfd < 0) DO_EXIT_1("Failed to open password file: %s\n", readpass); int passlen = read(passfd, passbuf, sizeof(passbuf)-1); close(passfd); if (passlen <= 0) DO_EXIT_1("Failed to read password from file: %s\n", readpass); passbuf[passlen] = 0x00; pass = strdup(passbuf); memset(passbuf, 0, sizeof(passbuf)); #ifdef PROVIDE_ASKPASS } else if (askpass) { pass = getpassword("Password: "); #endif } if (cmd == CMD_SIGN) { /* Read certificate and key */ if (keyfile && !p11module && (btmp = BIO_new_file(keyfile, "rb")) != NULL) { unsigned char magic[4]; unsigned char pvkhdr[4] = { 0x1e, 0xf1, 0xb5, 0xb0 }; magic[0] = 0x00; BIO_read(btmp, magic, 4); if (!memcmp(magic, pvkhdr, 4)) { pvkfile = keyfile; keyfile = NULL; } BIO_free(btmp); } if (pkcs12file != NULL) { if ((btmp = BIO_new_file(pkcs12file, "rb")) == NULL || (p12 = d2i_PKCS12_bio(btmp, NULL)) == NULL) DO_EXIT_1("Failed to read PKCS#12 file: %s\n", pkcs12file); BIO_free(btmp); if (!PKCS12_parse(p12, pass ? pass : "", &pkey, &cert, &certs)) DO_EXIT_1("Failed to parse PKCS#12 file: %s (Wrong password?)\n", pkcs12file); PKCS12_free(p12); } else if (pvkfile != NULL) { if ((btmp = BIO_new_file(certfile, "rb")) == NULL || ((p7 = d2i_PKCS7_bio(btmp, NULL)) == NULL && (certs = PEM_read_certs(btmp, "")) == NULL)) DO_EXIT_1("Failed to read certificate file: %s\n", certfile); BIO_free(btmp); if ((btmp = BIO_new_file(pvkfile, "rb")) == NULL || ((pkey = b2i_PVK_bio(btmp, NULL, pass ? pass : "")) == NULL && (BIO_seek(btmp, 0) == 0) && (pkey = b2i_PVK_bio(btmp, NULL, NULL)) == NULL)) DO_EXIT_1("Failed to read PVK file: %s\n", pvkfile); BIO_free(btmp); } else if (p11module != NULL) { const int CMD_MANDATORY = 0; if (p11engine != NULL) { ENGINE_load_dynamic(); ENGINE * dyn = ENGINE_by_id("dynamic"); if (!dyn) DO_EXIT_0("Failed to load 'dynamic' engine\n"); if (1 != ENGINE_ctrl_cmd_string(dyn, "SO_PATH", p11engine, CMD_MANDATORY)) DO_EXIT_1("Failed to set dyn SO_PATH to '%s'\n", p11engine); if (1 != ENGINE_ctrl_cmd_string(dyn, "ID", "pkcs11", CMD_MANDATORY)) DO_EXIT_0("Failed to set dyn ID to 'pkcs11'\n"); if (1 != ENGINE_ctrl_cmd(dyn, "LIST_ADD", 1, NULL, NULL, CMD_MANDATORY)) DO_EXIT_0("Failed to set dyn LIST_ADD to '1'\n"); if (1 != ENGINE_ctrl_cmd(dyn, "LOAD", 1, NULL, NULL, CMD_MANDATORY)) DO_EXIT_0("Failed to set dyn LOAD to '1'\n"); } else ENGINE_load_builtin_engines(); ENGINE * pkcs11 = ENGINE_by_id("pkcs11"); if (!pkcs11) DO_EXIT_0("Failed to find and load pkcs11 engine\n"); if (1 != ENGINE_ctrl_cmd_string(pkcs11, "MODULE_PATH", p11module, CMD_MANDATORY)) DO_EXIT_1("Failed to set pkcs11 engine MODULE_PATH to '%s'\n", p11module); if (pass != NULL) { if (1 != ENGINE_ctrl_cmd_string(pkcs11, "PIN", pass, CMD_MANDATORY)) DO_EXIT_0("Failed to set pkcs11 PIN\n"); } if (1 != ENGINE_init(pkcs11)) DO_EXIT_0("Failed to initialized pkcs11 engine\n"); pkey = ENGINE_load_private_key(pkcs11, keyfile, NULL, NULL); if (pkey == NULL) DO_EXIT_1("Failed to load private key %s\n", keyfile); if ((btmp = BIO_new_file(certfile, "rb")) == NULL || ((p7 = d2i_PKCS7_bio(btmp, NULL)) == NULL && (certs = PEM_read_certs(btmp, "")) == NULL)) DO_EXIT_1("Failed to read certificate file: %s\n", certfile); BIO_free(btmp); } else { if ((btmp = BIO_new_file(certfile, "rb")) == NULL || ((p7 = d2i_PKCS7_bio(btmp, NULL)) == NULL && (certs = PEM_read_certs(btmp, "")) == NULL)) DO_EXIT_1("Failed to read certificate file: %s\n", certfile); BIO_free(btmp); if ((btmp = BIO_new_file(keyfile, "rb")) == NULL || ((pkey = d2i_PrivateKey_bio(btmp, NULL)) == NULL && (BIO_seek(btmp, 0) == 0) && (pkey = PEM_read_bio_PrivateKey(btmp, NULL, NULL, pass ? pass : "")) == NULL && (BIO_seek(btmp, 0) == 0) && (pkey = PEM_read_bio_PrivateKey(btmp, NULL, NULL, NULL)) == NULL)) DO_EXIT_1("Failed to read private key file: %s (Wrong password?)\n", keyfile); BIO_free(btmp); } if (xcertfile) { if ((btmp = BIO_new_file(xcertfile, "rb")) == NULL || ((p7x = d2i_PKCS7_bio(btmp, NULL)) == NULL && (xcerts = PEM_read_certs(btmp, "")) == NULL)) DO_EXIT_1("Failed to read cross certificate file: %s\n", xcertfile); BIO_free(btmp); } if (pass) { memset (pass, 0, strlen(pass)); pass = NULL; } } if (certs == NULL && p7 != NULL) certs = sk_X509_dup(p7->d.sign->cert); /* Check if indata is cab or pe */ filesize = get_file_size(infile); if (filesize == 0) goto err_cleanup; indata = map_file(infile, filesize); if (indata == NULL) DO_EXIT_1("Failed to open file: %s\n", infile); /* reset header */ memset(&header, 0, sizeof(FILE_HEADER)); header.fileend = filesize; 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 { DO_EXIT_1("Unrecognized file type: %s\n", infile); } hash = BIO_new(BIO_f_md()); BIO_set_md(hash, md); if (type == FILE_TYPE_CAB) { if (pagehash == 1) fprintf(stderr, "Warning: -ph option is only valid for PE files\n"); #ifdef WITH_GSF if (add_msi_dse == 1) fprintf(stderr, "Warning: -add-msi-dse option is only valid for MSI files\n"); #endif if (!verify_cab_header(indata, infile, filesize, &header)) goto err_cleanup; } else if (type == FILE_TYPE_PE) { if (jp >= 0) fprintf(stderr, "Warning: -jp option is only valid for CAB files\n"); #ifdef WITH_GSF if (add_msi_dse == 1) fprintf(stderr, "Warning: -add-msi-dse option is only valid for MSI files\n"); #endif if (!verify_pe_header(indata, infile, filesize, &header)) goto err_cleanup; } else if (type == FILE_TYPE_MSI) { if (pagehash == 1) fprintf(stderr, "Warning: -ph option is only valid for PE files\n"); if (jp >= 0) fprintf(stderr, "Warning: -jp option is only valid for CAB files\n"); #ifdef WITH_GSF GsfInput *src; GsfInfile *ole; src = gsf_input_stdio_new(infile, NULL); if (!src) DO_EXIT_1("Error opening file %s\n", infile); ole = gsf_infile_msole_new(src, NULL); if (cmd == CMD_EXTRACT) { ret = msi_extract_file(ole, outfile, output_pkcs7); goto skip_signing; } else if (cmd == CMD_VERIFY) { ret = msi_verify_file(ole, leafhash, cafile, crlfile, untrusted); goto skip_signing; } else if ((cmd == CMD_SIGN && nest) || (cmd == CMD_ATTACH && nest) || cmd == CMD_ADD) { if (!msi_check_MsiDigitalSignatureEx(ole, md)) goto err_cleanup; cursig = msi_extract_signature_to_pkcs7(ole); if (cursig == NULL) { DO_EXIT_0("Unable to extract existing signature in -nest mode\n"); } if (cmd == CMD_ADD) { sig = cursig; } } sink = gsf_output_stdio_new(outfile, NULL); if (!sink) DO_EXIT_1("Error opening output file %s\n", outfile); outole = gsf_outfile_msole_new(sink); BIO_push(hash, BIO_new(BIO_s_null())); if (add_msi_dse) { p_msiex = malloc(EVP_MAX_MD_SIZE); if (!msi_calc_MsiDigitalSignatureEx(ole, md, hash, p_msiex, &len_msiex)) goto err_cleanup; } if (!msi_handle_dir(ole, outole, hash)) { DO_EXIT_0("Unable to msi_handle_dir()\n"); } if (cmd == CMD_REMOVE) { gsf_output_close(GSF_OUTPUT(outole)); g_object_unref(sink); } #else DO_EXIT_1("libgsf is not available, msi support is disabled: %s\n", infile); #endif } if ((type == FILE_TYPE_CAB || type == FILE_TYPE_PE) && (cmd != CMD_VERIFY)) { /* Create outdata file */ outdata = BIO_new_file(outfile, "w+bx"); if (outdata == NULL) DO_EXIT_1("Failed to create file: %s\n", 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", infile); } if (cmd == CMD_EXTRACT) { ret = extract_cab_file(indata, &header, outdata, output_pkcs7); goto skip_signing; } if (cmd == CMD_REMOVE) { remove_cab_file(indata, &header, filesize, outdata); goto skip_signing; } if (cmd == CMD_VERIFY) { ret = verify_cab_file(indata, &header, leafhash, cafile, crlfile, untrusted); goto skip_signing; } if ((cmd == CMD_SIGN && nest) || (cmd == CMD_ATTACH && nest) || cmd == CMD_ADD) { cursig = extract_existing_cab_pkcs7(indata, &header); if (!cursig) DO_EXIT_0("Unable to extract existing signature\n"); if (cmd == CMD_ADD) sig = cursig; } if (header.header_size == 20) /* Strip current signature and modify header */ modify_cab_header(indata, &header, hash, outdata); else add_cab_header(indata, &header, hash, outdata); } 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", infile); if (cmd == CMD_EXTRACT) { ret = extract_pe_file(indata, &header, outdata, output_pkcs7); goto skip_signing; } if ((cmd == CMD_SIGN && nest) || (cmd == CMD_ATTACH && nest) || cmd == CMD_ADD) { cursig = extract_existing_pe_pkcs7(indata, &header); if (!cursig) DO_EXIT_0("Unable to extract existing signature\n"); if (cmd == CMD_ADD) sig = cursig; } if (cmd == CMD_VERIFY) { ret = verify_pe_file(indata, &header, leafhash, cafile, crlfile, untrusted); goto skip_signing; } if (header.sigpos > 0) { /* Strip current signature */ header.fileend = header.sigpos; } modify_pe_header(indata, &header, hash, outdata); } if (cmd == CMD_ADD) goto add_only; if (cmd == CMD_ATTACH) { sig = attach_sigfile(sigfile, type); if (!sig) DO_EXIT_0("Unable to extract valid signature\n"); goto add_only; } if (cmd != CMD_SIGN) goto skip_signing; sig = PKCS7_new(); PKCS7_set_type(sig, NID_pkcs7_signed); si = NULL; if (cert != NULL) si = PKCS7_add_signature(sig, cert, pkey, md); for (i=0; si == NULL && i= 0) add_jp_attribute(si, jp); add_purpose_attribute(si, comm); if ((desc || url) && !add_opus_attribute(si, desc, url)) DO_EXIT_0("Couldn't allocate memory for opus info\n"); PKCS7_content_new(sig, NID_pkcs7_data); if (cert != NULL) { PKCS7_add_certificate(sig, cert); X509_free(cert); cert = NULL; } if (xcerts) { for(i = sk_X509_num(xcerts)-1; i>=0; i--) PKCS7_add_certificate(sig, sk_X509_value(xcerts, i)); } for(i = sk_X509_num(certs)-1; i>=0; i--) PKCS7_add_certificate(sig, sk_X509_value(certs, i)); if (certs) { sk_X509_free(certs); certs = NULL; } if (p7) { PKCS7_free(p7); p7 = NULL; } if (xcerts) { sk_X509_free(xcerts); xcerts = NULL; } if (p7x) { PKCS7_free(p7x); p7x = NULL; } get_indirect_data_blob(&p, &len, md, type, pagehash, indata, header.header_size, header.pe32plus, header.fileend); len -= EVP_MD_size(md); memcpy(buf, p, len); OPENSSL_free(p); if (!set_signing_bob(sig, hash, buf, len)) DO_EXIT_0("Signing failed\n"); add_only: #ifdef ENABLE_CURL /* add counter-signature/timestamp */ if (nturl && add_timestamp_authenticode(sig, turl, nturl, proxy, noverifypeer)) DO_EXIT_0("Authenticode timestamping failed\n"); if (ntsurl && add_timestamp_rfc3161(sig, tsurl, ntsurl, proxy, md, noverifypeer)) DO_EXIT_0("RFC 3161 timestamping failed\n"); #endif if (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 if (nest) { if (cursig == NULL) DO_EXIT_0("Internal error: No 'cursig' was extracted\n") if (pkcs7_set_nested_signature(cursig, sig, signing_time) == 0) DO_EXIT_0("Unable to append the nested signature to the current signature\n"); outsig = cursig; } else { outsig = sig; } /* Append signature to outfile */ if (((len = i2d_PKCS7(outsig, NULL)) <= 0) || (p = OPENSSL_malloc(len)) == NULL) DO_EXIT_1("i2d_PKCS memory allocation failed: %d\n", len); 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(outole, p, len)) DO_EXIT_1("Failed to write MSI 'DigitalSignature' signature to %s\n", infile); if (p_msiex != NULL && !msi_add_MsiDigitalSignatureEx(outole, p_msiex, len_msiex)) DO_EXIT_1("Failed to write MSI 'MsiDigitalSignatureEx' signature to %s\n", infile); gsf_output_close(GSF_OUTPUT(outole)); g_object_unref(sink); } #endif } PKCS7_free(sig); OPENSSL_free(p); skip_signing: 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) recalc_pe_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); } BIO_free_all(hash); hash = outdata = NULL; if (cmd == CMD_ATTACH) { if (type == FILE_TYPE_PE) { outdatasize = get_file_size(outfile); if (!outdatasize) DO_EXIT_0("Error verifying result\n"); outdataverify = map_file(outfile, outdatasize); if (!outdataverify) DO_EXIT_0("Error verifying result\n"); if (!verify_pe_header(outdataverify, outfile, outdatasize, &header)) goto err_cleanup; ret = verify_pe_file(outdataverify, &header, leafhash, cafile, crlfile, untrusted); if (ret) DO_EXIT_0("Signature mismatch\n"); } else if (type == FILE_TYPE_CAB) { outdatasize = get_file_size(outfile); if (!outdatasize) DO_EXIT_0("Error verifying result\n"); outdataverify = map_file(outfile, outdatasize); if (!outdataverify) DO_EXIT_0("Error verifying result\n"); if (!verify_cab_header(outdataverify, outfile, outdatasize, &header)) goto err_cleanup; ret = verify_cab_file(outdataverify, &header, leafhash, cafile, crlfile, untrusted); if (ret) DO_EXIT_0("Signature mismatch\n"); } else if (type == FILE_TYPE_MSI) { #ifdef WITH_GSF GsfInput *src; GsfInfile *ole; src = gsf_input_stdio_new(outfile, NULL); if (!src) DO_EXIT_1("Error opening file %s\n", outfile); ole = gsf_infile_msole_new(src, NULL); g_object_unref(src); ret = msi_verify_file(ole, leafhash, cafile, crlfile, untrusted); g_object_unref(ole); if (ret) DO_EXIT_0("Signature mismatch\n"); #else DO_EXIT_1("libgsf is not available, msi support is disabled: %s\n", infile); #endif } else { DO_EXIT_1("Unknown input type for file: %s\n", infile); } printf("Signature successfully attached\n"); } else { printf(ret ? "Failed\n" : "Succeeded\n"); } OPENSSL_free(cafile); OPENSSL_free(untrusted); if (crlfile) OPENSSL_free(crlfile); cleanup_lib_state(); return ret; err_cleanup: if (pass) { memset (pass, 0, strlen(pass)); pass = NULL; } ERR_print_errors_fp(stderr); if (certs) sk_X509_free(certs); if (p7) PKCS7_free(p7); if (p7x) PKCS7_free(p7x); if (xcerts) sk_X509_free(xcerts); if (cert) X509_free(cert); if (pkey) EVP_PKEY_free(pkey); if (hash) BIO_free_all(hash); if (outdata) unlink(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: */