/*
* testcrypt: a standalone test program that provides direct access to
* PuTTY's cryptography and mp_int code.
*/
/*
* This program speaks a line-oriented protocol on standard input and
* standard output. It's a half-duplex protocol: it expects to read
* one line of command, and then produce a fixed amount of output
* (namely a line containing a decimal integer, followed by that many
* lines each containing one return value).
*
* The protocol is human-readable enough to make it debuggable, but
* verbose enough that you probably wouldn't want to speak it by hand
* at any great length. The Python program test/testcrypt.py wraps it
* to give a more useful user-facing API, by invoking this binary as a
* subprocess.
*
* (I decided that was a better idea than making this program an
* actual Python module, partly because you can rewrap the same binary
* in another scripting language if you prefer, but mostly because
* it's easy to attach a debugger to testcrypt or to run it under
* sanitisers or valgrind or what have you.)
*/
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include "defs.h"
#include "ssh.h"
#include "sshkeygen.h"
#include "misc.h"
#include "mpint.h"
#include "crypto/ecc.h"
#include "crypto/ntru.h"
#include "proxy/cproxy.h"
static NORETURN PRINTF_LIKE(1, 2) void fatal_error(const char *p, ...)
{
va_list ap;
fprintf(stderr, "testcrypt: ");
va_start(ap, p);
vfprintf(stderr, p, ap);
va_end(ap);
fputc('\n', stderr);
exit(1);
}
void out_of_memory(void) { fatal_error("out of memory"); }
static bool old_keyfile_warning_given;
void old_keyfile_warning(void) { old_keyfile_warning_given = true; }
static bufchain random_data_queue;
static prng *test_prng;
void random_read(void *buf, size_t size)
{
if (test_prng) {
prng_read(test_prng, buf, size);
} else {
if (!bufchain_try_fetch_consume(&random_data_queue, buf, size))
fatal_error("No random data in queue");
}
}
uint64_t prng_reseed_time_ms(void)
{
static uint64_t previous_time = 0;
return previous_time += 200;
}
#define VALUE_TYPES(X) \
X(string, strbuf *, strbuf_free(v)) \
X(mpint, mp_int *, mp_free(v)) \
X(modsqrt, ModsqrtContext *, modsqrt_free(v)) \
X(monty, MontyContext *, monty_free(v)) \
X(wcurve, WeierstrassCurve *, ecc_weierstrass_curve_free(v)) \
X(wpoint, WeierstrassPoint *, ecc_weierstrass_point_free(v)) \
X(mcurve, MontgomeryCurve *, ecc_montgomery_curve_free(v)) \
X(mpoint, MontgomeryPoint *, ecc_montgomery_point_free(v)) \
X(ecurve, EdwardsCurve *, ecc_edwards_curve_free(v)) \
X(epoint, EdwardsPoint *, ecc_edwards_point_free(v)) \
X(hash, ssh_hash *, ssh_hash_free(v)) \
X(key, ssh_key *, ssh_key_free(v)) \
X(cipher, ssh_cipher *, ssh_cipher_free(v)) \
X(mac, ssh2_mac *, ssh2_mac_free(v)) \
X(dh, dh_ctx *, dh_cleanup(v)) \
X(ecdh, ecdh_key *, ecdh_key_free(v)) \
X(rsakex, RSAKey *, ssh_rsakex_freekey(v)) \
X(rsa, RSAKey *, rsa_free(v)) \
X(prng, prng *, prng_free(v)) \
X(keycomponents, key_components *, key_components_free(v)) \
X(pcs, PrimeCandidateSource *, pcs_free(v)) \
X(pgc, PrimeGenerationContext *, primegen_free_context(v)) \
X(pockle, Pockle *, pockle_free(v)) \
X(millerrabin, MillerRabin *, miller_rabin_free(v)) \
X(ntrukeypair, NTRUKeyPair *, ntru_keypair_free(v)) \
X(ntruencodeschedule, NTRUEncodeSchedule *, ntru_encode_schedule_free(v)) \
/* end of list */
typedef struct Value Value;
enum ValueType {
#define VALTYPE_ENUM(n,t,f) VT_##n,
VALUE_TYPES(VALTYPE_ENUM)
#undef VALTYPE_ENUM
};
typedef enum ValueType ValueType;
static const char *const type_names[] = {
#define VALTYPE_NAME(n,t,f) #n,
VALUE_TYPES(VALTYPE_NAME)
#undef VALTYPE_NAME
};
#define VALTYPE_TYPEDEF(n,t,f) \
typedef t TD_val_##n; \
typedef t *TD_out_val_##n;
VALUE_TYPES(VALTYPE_TYPEDEF)
#undef VALTYPE_TYPEDEF
struct Value {
/*
* Protocol identifier assigned to this value when it was created.
* Lives in the same malloced block as this Value object itself.
*/
ptrlen id;
/*
* Type of the value.
*/
ValueType type;
/*
* Union of all the things it could hold.
*/
union {
#define VALTYPE_UNION(n,t,f) t vu_##n;
VALUE_TYPES(VALTYPE_UNION)
#undef VALTYPE_UNION
char *bare_string;
};
};
static int valuecmp(void *av, void *bv)
{
Value *a = (Value *)av, *b = (Value *)bv;
return ptrlen_strcmp(a->id, b->id);
}
static int valuefind(void *av, void *bv)
{
ptrlen *a = (ptrlen *)av;
Value *b = (Value *)bv;
return ptrlen_strcmp(*a, b->id);
}
static tree234 *values;
static Value *value_new(ValueType vt)
{
static uint64_t next_index = 0;
char *name = dupprintf("%s%"PRIu64, type_names[vt], next_index++);
size_t namelen = strlen(name);
Value *val = snew_plus(Value, namelen+1);
memcpy(snew_plus_get_aux(val), name, namelen+1);
val->id.ptr = snew_plus_get_aux(val);
val->id.len = namelen;
val->type = vt;
Value *added = add234(values, val);
assert(added == val);
sfree(name);
return val;
}
#define VALTYPE_RETURNFN(n,t,f) \
void return_val_##n(strbuf *out, t v) { \
Value *val = value_new(VT_##n); \
val->vu_##n = v; \
put_datapl(out, val->id); \
put_byte(out, '\n'); \
}
VALUE_TYPES(VALTYPE_RETURNFN)
#undef VALTYPE_RETURNFN
static ptrlen get_word(BinarySource *in)
{
ptrlen toret;
toret.ptr = get_ptr(in);
toret.len = 0;
while (get_avail(in) && get_byte(in) != ' ')
toret.len++;
return toret;
}
typedef uintmax_t TD_uint;
typedef bool TD_boolean;
typedef ptrlen TD_val_string_ptrlen;
typedef char *TD_val_string_asciz;
typedef BinarySource *TD_val_string_binarysource;
typedef unsigned *TD_out_uint;
typedef BinarySink *TD_out_val_string_binarysink;
typedef const char *TD_opt_val_string_asciz;
typedef char **TD_out_val_string_asciz;
typedef char **TD_out_opt_val_string_asciz;
typedef const char **TD_out_opt_val_string_asciz_const;
typedef const ssh_hashalg *TD_hashalg;
typedef const ssh2_macalg *TD_macalg;
typedef const ssh_keyalg *TD_keyalg;
typedef const ssh_cipheralg *TD_cipheralg;
typedef const ssh_kex *TD_dh_group;
typedef const ssh_kex *TD_ecdh_alg;
typedef RsaSsh1Order TD_rsaorder;
typedef key_components *TD_keycomponents;
typedef const PrimeGenerationPolicy *TD_primegenpolicy;
typedef struct mpint_list TD_mpint_list;
typedef struct int16_list *TD_int16_list;
typedef PockleStatus TD_pocklestatus;
typedef struct mr_result TD_mr_result;
typedef Argon2Flavour TD_argon2flavour;
typedef FingerprintType TD_fptype;
typedef HttpDigestHash TD_httpdigesthash;
#define BEGIN_ENUM_TYPE(name) \
static bool enum_translate_##name(ptrlen valname, TD_##name *out) { \
static const struct { \
const char *key; \
TD_##name value; \
} mapping[] = {
#define ENUM_VALUE(name, value) {name, value},
#define END_ENUM_TYPE(name) \
}; \
for (size_t i = 0; i < lenof(mapping); i++) \
if (ptrlen_eq_string(valname, mapping[i].key)) { \
if (out) \
*out = mapping[i].value; \
return true; \
} \
return false; \
} \
\
static TD_##name get_##name(BinarySource *in) { \
ptrlen valname = get_word(in); \
TD_##name out; \
if (enum_translate_##name(valname, &out)) \
return out; \
else \
fatal_error("%s '%.*s': not found", \
#name, PTRLEN_PRINTF(valname)); \
}
#include "testcrypt-enum.h"
#undef BEGIN_ENUM_TYPE
#undef ENUM_VALUE
#undef END_ENUM_TYPE
static uintmax_t get_uint(BinarySource *in)
{
ptrlen word = get_word(in);
char *string = mkstr(word);
uintmax_t toret = strtoumax(string, NULL, 0);
sfree(string);
return toret;
}
static bool get_boolean(BinarySource *in)
{
return ptrlen_eq_string(get_word(in), "true");
}
static Value *lookup_value(ptrlen word)
{
Value *val = find234(values, &word, valuefind);
if (!val)
fatal_error("id '%.*s': not found", PTRLEN_PRINTF(word));
return val;
}
static Value *get_value(BinarySource *in)
{
return lookup_value(get_word(in));
}
typedef void (*finaliser_fn_t)(strbuf *out, void *ctx);
struct finaliser {
finaliser_fn_t fn;
void *ctx;
};
static struct finaliser *finalisers;
static size_t nfinalisers, finalisersize;
static void add_finaliser(finaliser_fn_t fn, void *ctx)
{
sgrowarray(finalisers, finalisersize, nfinalisers);
finalisers[nfinalisers].fn = fn;
finalisers[nfinalisers].ctx = ctx;
nfinalisers++;
}
static void run_finalisers(strbuf *out)
{
for (size_t i = 0; i < nfinalisers; i++)
finalisers[i].fn(out, finalisers[i].ctx);
nfinalisers = 0;
}
static void finaliser_return_value(strbuf *out, void *ctx)
{
Value *val = (Value *)ctx;
put_datapl(out, val->id);
put_byte(out, '\n');
}
static void finaliser_sfree(strbuf *out, void *ctx)
{
sfree(ctx);
}
#define VALTYPE_GETFN(n,t,f) \
static Value *unwrap_value_##n(Value *val) { \
ValueType expected = VT_##n; \
if (expected != val->type) \
fatal_error("id '%.*s': expected %s, got %s", \
PTRLEN_PRINTF(val->id), \
type_names[expected], type_names[val->type]); \
return val; \
} \
static Value *get_value_##n(BinarySource *in) { \
return unwrap_value_##n(get_value(in)); \
} \
static t get_val_##n(BinarySource *in) { \
return get_value_##n(in)->vu_##n; \
}
VALUE_TYPES(VALTYPE_GETFN)
#undef VALTYPE_GETFN
static ptrlen get_val_string_ptrlen(BinarySource *in)
{
return ptrlen_from_strbuf(get_val_string(in));
}
static char *get_val_string_asciz(BinarySource *in)
{
return get_val_string(in)->s;
}
static strbuf *get_opt_val_string(BinarySource *in);
static char *get_opt_val_string_asciz(BinarySource *in)
{
strbuf *sb = get_opt_val_string(in);
return sb ? sb->s : NULL;
}
static mp_int **get_out_val_mpint(BinarySource *in)
{
Value *val = value_new(VT_mpint);
add_finaliser(finaliser_return_value, val);
return &val->vu_mpint;
}
struct mpint_list {
size_t n;
mp_int **integers;
};
static struct mpint_list get_mpint_list(BinarySource *in)
{
size_t n = get_uint(in);
struct mpint_list mpl;
mpl.n = n;
mpl.integers = snewn(n, mp_int *);
for (size_t i = 0; i < n; i++)
mpl.integers[i] = get_val_mpint(in);
add_finaliser(finaliser_sfree, mpl.integers);
return mpl;
}
typedef struct int16_list {
size_t n;
uint16_t *integers;
} int16_list;
static void finaliser_int16_list_free(strbuf *out, void *vlist)
{
int16_list *list = (int16_list *)vlist;
sfree(list->integers);
sfree(list);
}
static int16_list *make_int16_list(size_t n)
{
int16_list *list = snew(int16_list);
list->n = n;
list->integers = snewn(n, uint16_t);
add_finaliser(finaliser_int16_list_free, list);
return list;
}
static int16_list *get_int16_list(BinarySource *in)
{
size_t n = get_uint(in);
int16_list *list = make_int16_list(n);
for (size_t i = 0; i < n; i++)
list->integers[i] = get_uint(in);
return list;
}
static void return_int16_list(strbuf *out, int16_list *list)
{
for (size_t i = 0; i < list->n; i++) {
if (i > 0)
put_byte(out, ',');
put_fmt(out, "%d", (int)(int16_t)list->integers[i]);
}
put_byte(out, '\n');
}
static void finaliser_return_uint(strbuf *out, void *ctx)
{
unsigned *uval = (unsigned *)ctx;
put_fmt(out, "%u\n", *uval);
sfree(uval);
}
static unsigned *get_out_uint(BinarySource *in)
{
unsigned *uval = snew(unsigned);
add_finaliser(finaliser_return_uint, uval);
return uval;
}
static BinarySink *get_out_val_string_binarysink(BinarySource *in)
{
Value *val = value_new(VT_string);
val->vu_string = strbuf_new();
add_finaliser(finaliser_return_value, val);
return BinarySink_UPCAST(val->vu_string);
}
static void return_val_string_asciz_const(strbuf *out, const char *s);
static void return_val_string_asciz(strbuf *out, char *s);
static void finaliser_return_opt_string_asciz(strbuf *out, void *ctx)
{
char **valp = (char **)ctx;
char *val = *valp;
sfree(valp);
if (!val)
put_fmt(out, "NULL\n");
else
return_val_string_asciz(out, val);
}
static char **get_out_opt_val_string_asciz(BinarySource *in)
{
char **valp = snew(char *);
*valp = NULL;
add_finaliser(finaliser_return_opt_string_asciz, valp);
return valp;
}
static void finaliser_return_opt_string_asciz_const(strbuf *out, void *ctx)
{
const char **valp = (const char **)ctx;
const char *val = *valp;
sfree(valp);
if (!val)
put_fmt(out, "NULL\n");
else
return_val_string_asciz_const(out, val);
}
static const char **get_out_opt_val_string_asciz_const(BinarySource *in)
{
const char **valp = snew(const char *);
*valp = NULL;
add_finaliser(finaliser_return_opt_string_asciz_const, valp);
return valp;
}
static BinarySource *get_val_string_binarysource(BinarySource *in)
{
strbuf *sb = get_val_string(in);
BinarySource *src = snew(BinarySource);
BinarySource_BARE_INIT(src, sb->u, sb->len);
add_finaliser(finaliser_sfree, src);
return src;
}
#define GET_CONSUMED_FN(type) \
typedef TD_val_##type TD_consumed_val_##type; \
static TD_val_##type get_consumed_val_##type(BinarySource *in) \
{ \
Value *val = get_value_##type(in); \
TD_val_##type toret = val->vu_##type; \
del234(values, val); \
sfree(val); \
return toret; \
}
GET_CONSUMED_FN(hash)
GET_CONSUMED_FN(pcs)
static void return_int(strbuf *out, intmax_t u)
{
put_fmt(out, "%"PRIdMAX"\n", u);
}
static void return_uint(strbuf *out, uintmax_t u)
{
put_fmt(out, "0x%"PRIXMAX"\n", u);
}
static void return_boolean(strbuf *out, bool b)
{
put_fmt(out, "%s\n", b ? "true" : "false");
}
static void return_pocklestatus(strbuf *out, PockleStatus status)
{
switch (status) {
default:
put_fmt(out, "POCKLE_BAD_STATUS_VALUE\n");
break;
#define STATUS_CASE(id) \
case id: \
put_fmt(out, "%s\n", #id); \
break;
POCKLE_STATUSES(STATUS_CASE);
#undef STATUS_CASE
}
}
static void return_mr_result(strbuf *out, struct mr_result result)
{
if (!result.passed)
put_fmt(out, "failed\n");
else if (!result.potential_primitive_root)
put_fmt(out, "passed\n");
else
put_fmt(out, "passed+ppr\n");
}
static void return_val_string_asciz_const(strbuf *out, const char *s)
{
strbuf *sb = strbuf_new();
put_data(sb, s, strlen(s));
return_val_string(out, sb);
}
static void return_val_string_asciz(strbuf *out, char *s)
{
return_val_string_asciz_const(out, s);
sfree(s);
}
#define NULLABLE_RETURN_WRAPPER(type_name, c_type) \
static void return_opt_##type_name(strbuf *out, c_type ptr) \
{ \
if (!ptr) \
put_fmt(out, "NULL\n"); \
else \
return_##type_name(out, ptr); \
}
NULLABLE_RETURN_WRAPPER(val_string, strbuf *)
NULLABLE_RETURN_WRAPPER(val_string_asciz, char *)
NULLABLE_RETURN_WRAPPER(val_string_asciz_const, const char *)
NULLABLE_RETURN_WRAPPER(val_cipher, ssh_cipher *)
NULLABLE_RETURN_WRAPPER(val_mac, ssh2_mac *)
NULLABLE_RETURN_WRAPPER(val_hash, ssh_hash *)
NULLABLE_RETURN_WRAPPER(val_key, ssh_key *)
NULLABLE_RETURN_WRAPPER(val_mpint, mp_int *)
NULLABLE_RETURN_WRAPPER(int16_list, int16_list *)
static void handle_hello(BinarySource *in, strbuf *out)
{
put_fmt(out, "hello, world\n");
}
static void rsa_free(RSAKey *rsa)
{
freersakey(rsa);
sfree(rsa);
}
static void free_value(Value *val)
{
switch (val->type) {
#define VALTYPE_FREE(n,t,f) case VT_##n: { t v = val->vu_##n; (f); break; }
VALUE_TYPES(VALTYPE_FREE)
#undef VALTYPE_FREE
}
sfree(val);
}
static void handle_free(BinarySource *in, strbuf *out)
{
Value *val = get_value(in);
del234(values, val);
free_value(val);
}
static void handle_newstring(BinarySource *in, strbuf *out)
{
strbuf *sb = strbuf_new();
while (get_avail(in)) {
char c = get_byte(in);
if (c == '%') {
char hex[3];
hex[0] = get_byte(in);
if (hex[0] != '%') {
hex[1] = get_byte(in);
hex[2] = '\0';
c = strtoul(hex, NULL, 16);
}
}
put_byte(sb, c);
}
return_val_string(out, sb);
}
static void handle_getstring(BinarySource *in, strbuf *out)
{
strbuf *sb = get_val_string(in);
for (size_t i = 0; i < sb->len; i++) {
char c = sb->s[i];
if (c > ' ' && c < 0x7F && c != '%') {
put_byte(out, c);
} else {
put_fmt(out, "%%%02X", 0xFFU & (unsigned)c);
}
}
put_byte(out, '\n');
}
static void handle_mp_literal(BinarySource *in, strbuf *out)
{
ptrlen pl = get_word(in);
char *str = mkstr(pl);
mp_int *mp = mp__from_string_literal(str);
sfree(str);
return_val_mpint(out, mp);
}
static void handle_mp_dump(BinarySource *in, strbuf *out)
{
mp_int *mp = get_val_mpint(in);
for (size_t i = mp_max_bytes(mp); i-- > 0 ;)
put_fmt(out, "%02X", mp_get_byte(mp, i));
put_byte(out, '\n');
}
static void handle_checkenum(BinarySource *in, strbuf *out)
{
ptrlen type = get_word(in);
ptrlen value = get_word(in);
bool ok = false;
#define BEGIN_ENUM_TYPE(name) \
if (ptrlen_eq_string(type, #name)) \
ok = enum_translate_##name(value, NULL);
#define ENUM_VALUE(name, value)
#define END_ENUM_TYPE(name)
#include "testcrypt-enum.h"
#undef BEGIN_ENUM_TYPE
#undef ENUM_VALUE
#undef END_ENUM_TYPE
put_dataz(out, ok ? "ok\n" : "bad\n");
}
static void random_queue(ptrlen pl)
{
bufchain_add(&random_data_queue, pl.ptr, pl.len);
}
static size_t random_queue_len(void)
{
return bufchain_size(&random_data_queue);
}
static void random_clear(void)
{
if (test_prng) {
prng_free(test_prng);
test_prng = NULL;
}
bufchain_clear(&random_data_queue);
}
static void random_make_prng(const ssh_hashalg *hashalg, ptrlen seed)
{
random_clear();
test_prng = prng_new(hashalg);
prng_seed_begin(test_prng);
put_datapl(test_prng, seed);
prng_seed_finish(test_prng);
}
mp_int *monty_identity_wrapper(MontyContext *mc)
{
return mp_copy(monty_identity(mc));
}
mp_int *monty_modulus_wrapper(MontyContext *mc)
{
return mp_copy(monty_modulus(mc));
}
strbuf *ssh_hash_digest_wrapper(ssh_hash *h)
{
strbuf *sb = strbuf_new();
void *p = strbuf_append(sb, ssh_hash_alg(h)->hlen);
ssh_hash_digest(h, p);
return sb;
}
strbuf *ssh_hash_final_wrapper(ssh_hash *h)
{
strbuf *sb = strbuf_new();
void *p = strbuf_append(sb, ssh_hash_alg(h)->hlen);
ssh_hash_final(h, p);
return sb;
}
void ssh_cipher_setiv_wrapper(ssh_cipher *c, ptrlen iv)
{
if (iv.len != ssh_cipher_alg(c)->blksize)
fatal_error("ssh_cipher_setiv: needs exactly %d bytes",
ssh_cipher_alg(c)->blksize);
ssh_cipher_setiv(c, iv.ptr);
}
void ssh_cipher_setkey_wrapper(ssh_cipher *c, ptrlen key)
{
if (key.len != ssh_cipher_alg(c)->padded_keybytes)
fatal_error("ssh_cipher_setkey: needs exactly %d bytes",
ssh_cipher_alg(c)->padded_keybytes);
ssh_cipher_setkey(c, key.ptr);
}
strbuf *ssh_cipher_encrypt_wrapper(ssh_cipher *c, ptrlen input)
{
if (input.len % ssh_cipher_alg(c)->blksize)
fatal_error("ssh_cipher_encrypt: needs a multiple of %d bytes",
ssh_cipher_alg(c)->blksize);
strbuf *sb = strbuf_dup(input);
ssh_cipher_encrypt(c, sb->u, sb->len);
return sb;
}
strbuf *ssh_cipher_decrypt_wrapper(ssh_cipher *c, ptrlen input)
{
if (input.len % ssh_cipher_alg(c)->blksize)
fatal_error("ssh_cipher_decrypt: needs a multiple of %d bytes",
ssh_cipher_alg(c)->blksize);
strbuf *sb = strbuf_dup(input);
ssh_cipher_decrypt(c, sb->u, sb->len);
return sb;
}
strbuf *ssh_cipher_encrypt_length_wrapper(ssh_cipher *c, ptrlen input,
unsigned long seq)
{
if (input.len != 4)
fatal_error("ssh_cipher_encrypt_length: needs exactly 4 bytes");
strbuf *sb = strbuf_dup(input);
ssh_cipher_encrypt_length(c, sb->u, sb->len, seq);
return sb;
}
strbuf *ssh_cipher_decrypt_length_wrapper(ssh_cipher *c, ptrlen input,
unsigned long seq)
{
if (input.len != 4)
fatal_error("ssh_cipher_decrypt_length: needs exactly 4 bytes");
strbuf *sb = strbuf_dup(input);
ssh_cipher_decrypt_length(c, sb->u, sb->len, seq);
return sb;
}
strbuf *ssh2_mac_genresult_wrapper(ssh2_mac *m)
{
strbuf *sb = strbuf_new();
void *u = strbuf_append(sb, ssh2_mac_alg(m)->len);
ssh2_mac_genresult(m, u);
return sb;
}
ssh_key *ssh_key_base_key_wrapper(ssh_key *key)
{
/* To avoid having to explain the borrowed reference to Python,
* just clone the key unconditionally */
return ssh_key_clone(ssh_key_base_key(key));
}
void ssh_key_ca_public_blob_wrapper(ssh_key *key, BinarySink *out)
{
/* Wrap to avoid null-pointer dereference */
if (!key->vt->is_certificate)
fatal_error("ssh_key_ca_public_blob: needs a certificate");
ssh_key_ca_public_blob(key, out);
}
void ssh_key_cert_id_string_wrapper(ssh_key *key, BinarySink *out)
{
/* Wrap to avoid null-pointer dereference */
if (!key->vt->is_certificate)
fatal_error("ssh_key_cert_id_string: needs a certificate");
ssh_key_cert_id_string(key, out);
}
static bool ssh_key_check_cert_wrapper(
ssh_key *key, bool host, ptrlen principal, uint64_t time, ptrlen optstr,
BinarySink *error)
{
/* Wrap to avoid null-pointer dereference */
if (!key->vt->is_certificate)
fatal_error("ssh_key_cert_id_string: needs a certificate");
ca_options opts;
opts.permit_rsa_sha1 = true;
opts.permit_rsa_sha256 = true;
opts.permit_rsa_sha512 = true;
while (optstr.len) {
ptrlen word = ptrlen_get_word(&optstr, ",");
ptrlen key = word, value = PTRLEN_LITERAL("");
const char *comma = memchr(word.ptr, '=', word.len);
if (comma) {
key.len = comma - (const char *)word.ptr;
value.ptr = comma + 1;
value.len = word.len - key.len - 1;
}
if (ptrlen_eq_string(key, "permit_rsa_sha1"))
opts.permit_rsa_sha1 = ptrlen_eq_string(value, "true");
if (ptrlen_eq_string(key, "permit_rsa_sha256"))
opts.permit_rsa_sha256 = ptrlen_eq_string(value, "true");
if (ptrlen_eq_string(key, "permit_rsa_sha512"))
opts.permit_rsa_sha512 = ptrlen_eq_string(value, "true");
}
return ssh_key_check_cert(key, host, principal, time, &opts, error);
}
bool dh_validate_f_wrapper(dh_ctx *dh, mp_int *f)
{
return dh_validate_f(dh, f) == NULL;
}
void ssh_hash_update(ssh_hash *h, ptrlen pl)
{
put_datapl(h, pl);
}
void ssh2_mac_update(ssh2_mac *m, ptrlen pl)
{
put_datapl(m, pl);
}
static RSAKey *rsa_new(void)
{
RSAKey *rsa = snew(RSAKey);
memset(rsa, 0, sizeof(RSAKey));
return rsa;
}
strbuf *ecdh_key_getkey_wrapper(ecdh_key *ek, ptrlen remoteKey)
{
/* Fold the boolean return value in C into the string return value
* for this purpose, by returning NULL on failure */
strbuf *sb = strbuf_new();
if (!ecdh_key_getkey(ek, remoteKey, BinarySink_UPCAST(sb))) {
strbuf_free(sb);
return NULL;
}
return sb;
}
static void int16_list_resize(int16_list *list, unsigned p)
{
list->integers = sresize(list->integers, p, uint16_t);
for (size_t i = list->n; i < p; i++)
list->integers[i] = 0;
}
#if 0
static int16_list ntru_ring_to_list_and_free(uint16_t *out, unsigned p)
{
struct mpint_list mpl;
mpl.n = p;
mpl->integers = snewn(p, mp_int *);
for (unsigned i = 0; i < p; i++)
mpl->integers[i] = mp_from_integer((int16_t)out[i]);
sfree(out);
add_finaliser(finaliser_sfree, mpl->integers);
return mpl;
}
#endif
int16_list *ntru_ring_multiply_wrapper(
int16_list *a, int16_list *b, unsigned p, unsigned q)
{
int16_list_resize(a, p);
int16_list_resize(b, p);
int16_list *out = make_int16_list(p);
ntru_ring_multiply(out->integers, a->integers, b->integers, p, q);
return out;
}
int16_list *ntru_ring_invert_wrapper(int16_list *in, unsigned p, unsigned q)
{
int16_list_resize(in, p);
int16_list *out = make_int16_list(p);
unsigned success = ntru_ring_invert(out->integers, in->integers, p, q);
if (!success)
return NULL;
return out;
}
int16_list *ntru_mod3_wrapper(int16_list *in, unsigned p, unsigned q)
{
int16_list_resize(in, p);
int16_list *out = make_int16_list(p);
ntru_mod3(out->integers, in->integers, p, q);
return out;
}
int16_list *ntru_round3_wrapper(int16_list *in, unsigned p, unsigned q)
{
int16_list_resize(in, p);
int16_list *out = make_int16_list(p);
ntru_round3(out->integers, in->integers, p, q);
return out;
}
int16_list *ntru_bias_wrapper(int16_list *in, unsigned bias,
unsigned p, unsigned q)
{
int16_list_resize(in, p);
int16_list *out = make_int16_list(p);
ntru_bias(out->integers, in->integers, bias, p, q);
return out;
}
int16_list *ntru_scale_wrapper(int16_list *in, unsigned scale,
unsigned p, unsigned q)
{
int16_list_resize(in, p);
int16_list *out = make_int16_list(p);
ntru_scale(out->integers, in->integers, scale, p, q);
return out;
}
NTRUEncodeSchedule *ntru_encode_schedule_wrapper(int16_list *in)
{
return ntru_encode_schedule(in->integers, in->n);
}
void ntru_encode_wrapper(NTRUEncodeSchedule *sched, int16_list *rs,
BinarySink *bs)
{
ntru_encode(sched, rs->integers, bs);
}
int16_list *ntru_decode_wrapper(NTRUEncodeSchedule *sched, ptrlen data)
{
int16_list *out = make_int16_list(ntru_encode_schedule_nvals(sched));
ntru_decode(sched, out->integers, data);
return out;
}
int16_list *ntru_gen_short_wrapper(unsigned p, unsigned w)
{
int16_list *out = make_int16_list(p);
ntru_gen_short(out->integers, p, w);
return out;
}
int16_list *ntru_pubkey_wrapper(NTRUKeyPair *keypair)
{
unsigned p = ntru_keypair_p(keypair);
int16_list *out = make_int16_list(p);
memcpy(out->integers, ntru_pubkey(keypair), p*sizeof(uint16_t));
return out;
}
int16_list *ntru_encrypt_wrapper(int16_list *plaintext, int16_list *pubkey,
unsigned p, unsigned q)
{
int16_list *out = make_int16_list(p);
ntru_encrypt(out->integers, plaintext->integers, pubkey->integers, p, q);
return out;
}
int16_list *ntru_decrypt_wrapper(int16_list *ciphertext, NTRUKeyPair *keypair)
{
unsigned p = ntru_keypair_p(keypair);
int16_list *out = make_int16_list(p);
ntru_decrypt(out->integers, ciphertext->integers, keypair);
return out;
}
strbuf *rsa_ssh1_encrypt_wrapper(ptrlen input, RSAKey *key)
{
/* Fold the boolean return value in C into the string return value
* for this purpose, by returning NULL on failure */
strbuf *sb = strbuf_new();
put_datapl(sb, input);
put_padding(sb, key->bytes - input.len, 0);
if (!rsa_ssh1_encrypt(sb->u, input.len, key)) {
strbuf_free(sb);
return NULL;
}
return sb;
}
strbuf *rsa_ssh1_decrypt_pkcs1_wrapper(mp_int *input, RSAKey *key)
{
/* Again, return "" on failure */
strbuf *sb = strbuf_new();
if (!rsa_ssh1_decrypt_pkcs1(input, key, sb))
strbuf_clear(sb);
return sb;
}
strbuf *des_encrypt_xdmauth_wrapper(ptrlen key, ptrlen data)
{
if (key.len != 7)
fatal_error("des_encrypt_xdmauth: key must be 7 bytes long");
if (data.len % 8 != 0)
fatal_error("des_encrypt_xdmauth: data must be a multiple of 8 bytes");
strbuf *sb = strbuf_dup(data);
des_encrypt_xdmauth(key.ptr, sb->u, sb->len);
return sb;
}
strbuf *des_decrypt_xdmauth_wrapper(ptrlen key, ptrlen data)
{
if (key.len != 7)
fatal_error("des_decrypt_xdmauth: key must be 7 bytes long");
if (data.len % 8 != 0)
fatal_error("des_decrypt_xdmauth: data must be a multiple of 8 bytes");
strbuf *sb = strbuf_dup(data);
des_decrypt_xdmauth(key.ptr, sb->u, sb->len);
return sb;
}
strbuf *des3_encrypt_pubkey_wrapper(ptrlen key, ptrlen data)
{
if (key.len != 16)
fatal_error("des3_encrypt_pubkey: key must be 16 bytes long");
if (data.len % 8 != 0)
fatal_error("des3_encrypt_pubkey: data must be a multiple of 8 bytes");
strbuf *sb = strbuf_dup(data);
des3_encrypt_pubkey(key.ptr, sb->u, sb->len);
return sb;
}
strbuf *des3_decrypt_pubkey_wrapper(ptrlen key, ptrlen data)
{
if (key.len != 16)
fatal_error("des3_decrypt_pubkey: key must be 16 bytes long");
if (data.len % 8 != 0)
fatal_error("des3_decrypt_pubkey: data must be a multiple of 8 bytes");
strbuf *sb = strbuf_dup(data);
des3_decrypt_pubkey(key.ptr, sb->u, sb->len);
return sb;
}
strbuf *des3_encrypt_pubkey_ossh_wrapper(ptrlen key, ptrlen iv, ptrlen data)
{
if (key.len != 24)
fatal_error("des3_encrypt_pubkey_ossh: key must be 24 bytes long");
if (iv.len != 8)
fatal_error("des3_encrypt_pubkey_ossh: iv must be 8 bytes long");
if (data.len % 8 != 0)
fatal_error("des3_encrypt_pubkey_ossh: data must be a multiple of 8 bytes");
strbuf *sb = strbuf_dup(data);
des3_encrypt_pubkey_ossh(key.ptr, iv.ptr, sb->u, sb->len);
return sb;
}
strbuf *des3_decrypt_pubkey_ossh_wrapper(ptrlen key, ptrlen iv, ptrlen data)
{
if (key.len != 24)
fatal_error("des3_decrypt_pubkey_ossh: key must be 24 bytes long");
if (iv.len != 8)
fatal_error("des3_encrypt_pubkey_ossh: iv must be 8 bytes long");
if (data.len % 8 != 0)
fatal_error("des3_decrypt_pubkey_ossh: data must be a multiple of 8 bytes");
strbuf *sb = strbuf_dup(data);
des3_decrypt_pubkey_ossh(key.ptr, iv.ptr, sb->u, sb->len);
return sb;
}
strbuf *aes256_encrypt_pubkey_wrapper(ptrlen key, ptrlen iv, ptrlen data)
{
if (key.len != 32)
fatal_error("aes256_encrypt_pubkey: key must be 32 bytes long");
if (iv.len != 16)
fatal_error("aes256_encrypt_pubkey: iv must be 16 bytes long");
if (data.len % 16 != 0)
fatal_error("aes256_encrypt_pubkey: data must be a multiple of 16 bytes");
strbuf *sb = strbuf_dup(data);
aes256_encrypt_pubkey(key.ptr, iv.ptr, sb->u, sb->len);
return sb;
}
strbuf *aes256_decrypt_pubkey_wrapper(ptrlen key, ptrlen iv, ptrlen data)
{
if (key.len != 32)
fatal_error("aes256_decrypt_pubkey: key must be 32 bytes long");
if (iv.len != 16)
fatal_error("aes256_encrypt_pubkey: iv must be 16 bytes long");
if (data.len % 16 != 0)
fatal_error("aes256_decrypt_pubkey: data must be a multiple of 16 bytes");
strbuf *sb = strbuf_dup(data);
aes256_decrypt_pubkey(key.ptr, iv.ptr, sb->u, sb->len);
return sb;
}
strbuf *prng_read_wrapper(prng *pr, size_t size)
{
strbuf *sb = strbuf_new();
prng_read(pr, strbuf_append(sb, size), size);
return sb;
}
void prng_seed_update(prng *pr, ptrlen data)
{
put_datapl(pr, data);
}
bool crcda_detect(ptrlen packet, ptrlen iv)
{
if (iv.len != 0 && iv.len != 8)
fatal_error("crcda_detect: iv must be empty or 8 bytes long");
if (packet.len % 8 != 0)
fatal_error("crcda_detect: packet must be a multiple of 8 bytes");
struct crcda_ctx *ctx = crcda_make_context();
bool toret = detect_attack(ctx, packet.ptr, packet.len,
iv.len ? iv.ptr : NULL);
crcda_free_context(ctx);
return toret;
}
ssh_key *ppk_load_s_wrapper(BinarySource *src, char **comment,
const char *passphrase, const char **errorstr)
{
ssh2_userkey *uk = ppk_load_s(src, passphrase, errorstr);
if (uk == SSH2_WRONG_PASSPHRASE) {
/* Fudge this special return value */
*errorstr = "SSH2_WRONG_PASSPHRASE";
return NULL;
}
if (uk == NULL)
return NULL;
ssh_key *toret = uk->key;
*comment = uk->comment;
sfree(uk);
return toret;
}
int rsa1_load_s_wrapper(BinarySource *src, RSAKey *rsa, char **comment,
const char *passphrase, const char **errorstr)
{
int toret = rsa1_load_s(src, rsa, passphrase, errorstr);
*comment = rsa->comment;
rsa->comment = NULL;
return toret;
}
strbuf *ppk_save_sb_wrapper(
ssh_key *key, const char *comment, const char *passphrase,
unsigned fmt_version, Argon2Flavour flavour,
uint32_t mem, uint32_t passes, uint32_t parallel)
{
/*
* For repeatable testing purposes, we never want a timing-dependent
* choice of password hashing parameters, so this is easy.
*/
ppk_save_parameters save_params;
memset(&save_params, 0, sizeof(save_params));
save_params.fmt_version = fmt_version;
save_params.argon2_flavour = flavour;
save_params.argon2_mem = mem;
save_params.argon2_passes_auto = false;
save_params.argon2_passes = passes;
save_params.argon2_parallelism = parallel;
ssh2_userkey uk;
uk.key = key;
uk.comment = dupstr(comment);
strbuf *toret = ppk_save_sb(&uk, passphrase, &save_params);
sfree(uk.comment);
return toret;
}
strbuf *rsa1_save_sb_wrapper(RSAKey *key, const char *comment,
const char *passphrase)
{
key->comment = dupstr(comment);
strbuf *toret = rsa1_save_sb(key, passphrase);
sfree(key->comment);
key->comment = NULL;
return toret;
}
#define return_void(out, expression) (expression)
static ProgressReceiver null_progress = { .vt = &null_progress_vt };
mp_int *primegen_generate_wrapper(
PrimeGenerationContext *ctx, PrimeCandidateSource *pcs)
{
return primegen_generate(ctx, pcs, &null_progress);
}
RSAKey *rsa1_generate(int bits, bool strong, PrimeGenerationContext *pgc)
{
RSAKey *rsakey = snew(RSAKey);
rsa_generate(rsakey, bits, strong, pgc, &null_progress);
rsakey->comment = NULL;
return rsakey;
}
ssh_key *rsa_generate_wrapper(int bits, bool strong,
PrimeGenerationContext *pgc)
{
return &rsa1_generate(bits, strong, pgc)->sshk;
}
ssh_key *dsa_generate_wrapper(int bits, PrimeGenerationContext *pgc)
{
struct dsa_key *dsakey = snew(struct dsa_key);
dsa_generate(dsakey, bits, pgc, &null_progress);
return &dsakey->sshk;
}
ssh_key *ecdsa_generate_wrapper(int bits)
{
struct ecdsa_key *ek = snew(struct ecdsa_key);
if (!ecdsa_generate(ek, bits)) {
sfree(ek);
return NULL;
}
return &ek->sshk;
}
ssh_key *eddsa_generate_wrapper(int bits)
{
struct eddsa_key *ek = snew(struct eddsa_key);
if (!eddsa_generate(ek, bits)) {
sfree(ek);
return NULL;
}
return &ek->sshk;
}
size_t key_components_count(key_components *kc) { return kc->ncomponents; }
const char *key_components_nth_name(key_components *kc, size_t n)
{
return (n >= kc->ncomponents ? NULL :
kc->components[n].name);
}
strbuf *key_components_nth_str(key_components *kc, size_t n)
{
if (n >= kc->ncomponents)
return NULL;
if (kc->components[n].type != KCT_TEXT &&
kc->components[n].type != KCT_BINARY)
return NULL;
return strbuf_dup(ptrlen_from_strbuf(kc->components[n].str));
}
mp_int *key_components_nth_mp(key_components *kc, size_t n)
{
return (n >= kc->ncomponents ? NULL :
kc->components[n].type != KCT_MPINT ? NULL :
mp_copy(kc->components[n].mp));
}
PockleStatus pockle_add_prime_wrapper(Pockle *pockle, mp_int *p,
struct mpint_list mpl, mp_int *witness)
{
return pockle_add_prime(pockle, p, mpl.integers, mpl.n, witness);
}
strbuf *argon2_wrapper(Argon2Flavour flavour, uint32_t mem, uint32_t passes,
uint32_t parallel, uint32_t taglen,
ptrlen P, ptrlen S, ptrlen K, ptrlen X)
{
strbuf *out = strbuf_new();
argon2(flavour, mem, passes, parallel, taglen, P, S, K, X, out);
return out;
}
strbuf *openssh_bcrypt_wrapper(ptrlen passphrase, ptrlen salt,
unsigned rounds, unsigned outbytes)
{
strbuf *out = strbuf_new();
openssh_bcrypt(passphrase, salt, rounds,
strbuf_append(out, outbytes), outbytes);
return out;
}
strbuf *get_implementations_commasep(ptrlen alg)
{
strbuf *out = strbuf_new();
put_datapl(out, alg);
if (ptrlen_startswith(alg, PTRLEN_LITERAL("aesgcm"), NULL)) {
put_fmt(out, ",%.*s_sw", PTRLEN_PRINTF(alg));
put_fmt(out, ",%.*s_ref_poly", PTRLEN_PRINTF(alg));
#if HAVE_CLMUL
put_fmt(out, ",%.*s_clmul", PTRLEN_PRINTF(alg));
#endif
#if HAVE_NEON_PMULL
put_fmt(out, ",%.*s_neon", PTRLEN_PRINTF(alg));
#endif
} else if (ptrlen_startswith(alg, PTRLEN_LITERAL("aes"), NULL)) {
put_fmt(out, ",%.*s_sw", PTRLEN_PRINTF(alg));
#if HAVE_AES_NI
put_fmt(out, ",%.*s_ni", PTRLEN_PRINTF(alg));
#endif
#if HAVE_NEON_CRYPTO
put_fmt(out, ",%.*s_neon", PTRLEN_PRINTF(alg));
#endif
} else if (ptrlen_startswith(alg, PTRLEN_LITERAL("sha256"), NULL) ||
ptrlen_startswith(alg, PTRLEN_LITERAL("sha1"), NULL)) {
put_fmt(out, ",%.*s_sw", PTRLEN_PRINTF(alg));
#if HAVE_SHA_NI
put_fmt(out, ",%.*s_ni", PTRLEN_PRINTF(alg));
#endif
#if HAVE_NEON_CRYPTO
put_fmt(out, ",%.*s_neon", PTRLEN_PRINTF(alg));
#endif
} else if (ptrlen_startswith(alg, PTRLEN_LITERAL("sha512"), NULL)) {
put_fmt(out, ",%.*s_sw", PTRLEN_PRINTF(alg));
#if HAVE_NEON_SHA512
put_fmt(out, ",%.*s_neon", PTRLEN_PRINTF(alg));
#endif
}
return out;
}
#define OPTIONAL_PTR_FUNC(type) \
typedef TD_val_##type TD_opt_val_##type; \
static TD_opt_val_##type get_opt_val_##type(BinarySource *in) { \
ptrlen word = get_word(in); \
if (ptrlen_eq_string(word, "NULL")) \
return NULL; \
return unwrap_value_##type(lookup_value(word))->vu_##type; \
}
OPTIONAL_PTR_FUNC(cipher)
OPTIONAL_PTR_FUNC(mpint)
OPTIONAL_PTR_FUNC(string)
/*
* HERE BE DRAGONS: the horrible C preprocessor business that reads
* testcrypt-func.h and generates a marshalling wrapper for each
* exported function.
*
* In an ideal world, we would start from a specification like this in
* testcrypt-func.h
*
* FUNC(val_foo, example, ARG(val_bar, bar), ARG(uint, n))
*
* and generate a wrapper function looking like this:
*
* static void handle_example(BinarySource *in, strbuf *out) {
* TD_val_bar bar = get_val_bar(in);
* TD_uint n = get_uint(in);
* return_val_foo(out, example(bar, n));
* }
*
* which would read the marshalled form of each function argument in
* turn from the input BinarySource via the get_<type>() function
* family defined in this file; assign each argument to a local
* variable; call the underlying C function with all those arguments;
* and then call a function of the return_<type>() family to marshal
* the output value into the output strbuf to be sent to standard
* output.
*
* With a more general macro processor such as m4, or custom code in
* Perl or Python, or a helper program like llvm-tblgen, we could just
* do that directly, reading function specifications from
* testcrypt-func.h and writing out exactly the above. But we don't
* have a fully general macro processor (since everything in that
* category introduces an extra build dependency that's awkward on
* plain Windows, or requires compiling and running a helper program
* which is awkward in a cross-compile). We only have cpp. And in cpp,
* a macro can't expand one of its arguments differently in two parts
* of its own expansion. So we have to be more clever.
*
* In place of the above code, I instead generate three successive
* declarations for each function. In simplified form they would look
* like this:
*
* typedef struct ARGS_example {
* TD_val_bar bar;
* TD_uint n;
* } ARGS_example;
*
* static inline ARGS_example get_args_example(BinarySource *in) {
* ARGS_example args;
* args.bar = get_val_bar(in);
* args.n = get_uint(in);
* return args;
* }
*
* static void handle_example(BinarySource *in, strbuf *out) {
* ARGS_example args = get_args_example(in);
* return_val_foo(out, example(args.bar, args.n));
* }
*
* Each of these mentions the arguments and their types just _once_,
* so each one can be generated by a single expansion of the FUNC(...)
* specification in testcrypt-func.h, with FUNC and ARG and VOID
* defined to appropriate values.
*
* Or ... *nearly*. In fact, I left out several details there, but
* it's a good starting point to understand the full version.
*
* To begin with, several of the variable names shown above are
* actually named with an ugly leading underscore, to minimise the
* chance of them colliding with real parameter names. (You could
* easily imagine 'out' being the name of a parameter to one of the
* wrapped functions.) Also, we memset the whole structure to zero at
* the start of get_args_example() to avoid compiler warnings about
* uninitialised stuff, and insert a precautionary '(void)args;' in
* handle_example to avoid a similar warning about _unused_ stuff.
*
* The big problem is the commas that have to appear between arguments
* in the final call to the actual C function. Those can't be
* generated by expanding the ARG macro itself, or you'd get one too
* many - either a leading comma or a trailing comma. Trailing commas
* are legal in a Python function call, but unfortunately C is not yet
* so enlightened. (C permits a trailing comma in a struct or array
* initialiser, and is coming round to it in enums, but hasn't yet
* seen the light about function calls or function prototypes.)
*
* So the commas must appear _between_ ARG(...) specifiers. And that
* means they unavoidably appear in _every_ expansion of FUNC() (or
* rather, every expansion that uses the variadic argument list at
* all). Therefore, we need to ensure they're harmless in the other
* two functions as well.
*
* In the get_args_example() function above, there's no real problem.
* The list of assignments can perfectly well be separated by commas
* instead of semicolons, so that it becomes a single expression-
* statement instead of a sequence of them; the comma operator still
* defines a sequence point, so it's fine.
*
* But what about the structure definition of ARGS_example?
*
* To get round that, we fill the structure with pointless extra
* cruft, in the form of an extra 'int' field before and after each
* actually useful argument field. So the real structure definition
* ends up looking more like this:
*
* typedef struct ARGS_example {
* int _predummy_bar;
* TD_val_bar bar;
* int _postdummy_bar, _predummy_n;
* TD_uint n;
* int _postdummy_n;
* } ARGS_example;
*
* Those extra 'int' fields are ignored completely at run time. They
* might cause a runtime space cost if the struct doesn't get
* completely optimised away when get_args_example is inlined into
* handle_example, but even if so, that's OK, this is a test program
* whose memory usage isn't critical. The real point is that, in
* between each pair of real arguments, there's a declaration
* containing *two* int variables, and in between them is the vital
* comma that we need!
*
* So in that pass through testcrypt-func.h, the ARG(type, name) macro
* has to expand to the weird piece of text
*
* _predummy_name; // terminating the previous int declaration
* TD_type name; // declaring the thing we actually wanted
* int _postdummy_name // new declaration ready to see a comma
*
* so that a comma-separated list of pieces of expansion like that
* will fall into just the right form to be the core of the above
* expanded structure definition. Then we just need to put in the
* 'int' after the open brace, and the ';' before the closing brace,
* and we've got everything we need to make it all syntactically legal.
*
* Finally, what if a wrapped function has _no_ arguments? Two out of
* three uses of the argument list here need some kind of special case
* for that. That's why you have to write 'VOID' explicitly in an
* empty argument list in testcrypt-func.h: we make VOID expand to
* whatever is needed to avoid a syntax error in that special case.
*/
/*
* Workarounds for an awkwardness in Visual Studio's preprocessor,
* which disagrees with everyone else about what happens if you expand
* __VA_ARGS__ into the argument list of another macro. gcc and clang
* will treat the commas expanding from __VA_ARGS__ as argument
* separators, whereas VS will make them all part of a single argument
* to the secondary macro. We want the former behaviour, so we use
* the following workaround to enforce it.
*
* Each of these JUXTAPOSE macros simply places its arguments side by
* side. But the arguments are macro-expanded before JUXTAPOSE is
* called at all, so we can do this:
*
* JUXTAPOSE(macroname, (__VA_ARGS__))
* -> JUXTAPOSE(macroname, (foo, bar, baz))
* -> macroname (foo, bar, baz)
*
* and this preliminary expansion causes the commas to be treated
* normally by the time VS gets round to expanding the inner macro.
*
* We need two differently named JUXTAPOSE macros, because we have to
* do this trick twice: once to turn FUNC and FUNC_WRAPPED in
* testcrypt-funcs.h into the underlying common FUNC_INNER, and again
* to expand the final function call. And you can't expand a macro
* inside text expanded from the _same_ macro, so we have to do the
* outer and inner instances of this trick using macros of different
* names.
*/
#define JUXTAPOSE1(first, second) first second
#define JUXTAPOSE2(first, second) first second
#define FUNC(outtype, fname, ...) \
JUXTAPOSE1(FUNC_INNER, (outtype, fname, fname, __VA_ARGS__))
#define FUNC_WRAPPED(outtype, fname, ...) \
JUXTAPOSE1(FUNC_INNER, (outtype, fname, fname##_wrapper, __VA_ARGS__))
#define ARG(type, arg) _predummy_##arg; TD_##type arg; int _postdummy_##arg
#define VOID _voiddummy
#define FUNC_INNER(outtype, fname, realname, ...) \
typedef struct ARGS_##fname { \
int __VA_ARGS__; \
} ARGS_##fname;
#include "testcrypt-func.h"
#undef FUNC_INNER
#undef ARG
#undef VOID
#define ARG(type, arg) _args.arg = get_##type(_in)
#define VOID ((void)0)
#define FUNC_INNER(outtype, fname, realname, ...) \
static inline ARGS_##fname get_args_##fname(BinarySource *_in) { \
ARGS_##fname _args; \
memset(&_args, 0, sizeof(_args)); \
__VA_ARGS__; \
return _args; \
}
#include "testcrypt-func.h"
#undef FUNC_INNER
#undef ARG
#undef VOID
#define ARG(type, arg) _args.arg
#define VOID
#define FUNC_INNER(outtype, fname, realname, ...) \
static void handle_##fname(BinarySource *_in, strbuf *_out) { \
ARGS_##fname _args = get_args_##fname(_in); \
(void)_args; /* suppress warning if no actual arguments */ \
return_##outtype(_out, JUXTAPOSE2(realname, (__VA_ARGS__))); \
}
#include "testcrypt-func.h"
#undef FUNC_INNER
#undef ARG
static void process_line(BinarySource *in, strbuf *out)
{
ptrlen id = get_word(in);
#define DISPATCH_INTERNAL(cmdname, handler) do { \
if (ptrlen_eq_string(id, cmdname)) { \
handler(in, out); \
return; \
} \
} while (0)
#define DISPATCH_COMMAND(cmd) DISPATCH_INTERNAL(#cmd, handle_##cmd)
DISPATCH_COMMAND(hello);
DISPATCH_COMMAND(free);
DISPATCH_COMMAND(newstring);
DISPATCH_COMMAND(getstring);
DISPATCH_COMMAND(mp_literal);
DISPATCH_COMMAND(mp_dump);
DISPATCH_COMMAND(checkenum);
#undef DISPATCH_COMMAND
#define FUNC_INNER(outtype, fname, realname, ...) \
DISPATCH_INTERNAL(#fname,handle_##fname);
#include "testcrypt-func.h"
#undef FUNC_INNER
#undef DISPATCH_INTERNAL
fatal_error("command '%.*s': unrecognised", PTRLEN_PRINTF(id));
}
static void free_all_values(void)
{
for (Value *val; (val = delpos234(values, 0)) != NULL ;)
free_value(val);
freetree234(values);
}
void dputs(const char *buf)
{
fputs(buf, stderr);
}
int main(int argc, char **argv)
{
const char *infile = NULL, *outfile = NULL;
bool doing_opts = true;
while (--argc > 0) {
char *p = *++argv;
if (p[0] == '-' && doing_opts) {
if (!strcmp(p, "-o")) {
if (--argc <= 0) {
fprintf(stderr, "'-o' expects a filename\n");
return 1;
}
outfile = *++argv;
} else if (!strcmp(p, "--")) {
doing_opts = false;
} else if (!strcmp(p, "--help")) {
printf("usage: testcrypt [INFILE] [-o OUTFILE]\n");
printf(" also: testcrypt --help display this text\n");
return 0;
} else {
fprintf(stderr, "unknown command line option '%s'\n", p);
return 1;
}
} else if (!infile) {
infile = p;
} else {
fprintf(stderr, "can only handle one input file name\n");
return 1;
}
}
FILE *infp = stdin;
if (infile) {
infp = fopen(infile, "r");
if (!infp) {
fprintf(stderr, "%s: open: %s\n", infile, strerror(errno));
return 1;
}
}
FILE *outfp = stdout;
if (outfile) {
outfp = fopen(outfile, "w");
if (!outfp) {
fprintf(stderr, "%s: open: %s\n", outfile, strerror(errno));
return 1;
}
}
values = newtree234(valuecmp);
atexit(free_all_values);
for (char *line; (line = chomp(fgetline(infp))) != NULL ;) {
BinarySource src[1];
BinarySource_BARE_INIT(src, line, strlen(line));
strbuf *sb = strbuf_new();
process_line(src, sb);
run_finalisers(sb);
size_t lines = 0;
for (size_t i = 0; i < sb->len; i++)
if (sb->s[i] == '\n')
lines++;
fprintf(outfp, "%"SIZEu"\n%s", lines, sb->s);
fflush(outfp);
strbuf_free(sb);
sfree(line);
}
if (infp != stdin)
fclose(infp);
if (outfp != stdin)
fclose(outfp);
return 0;
}