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/* See LICENSE file for copyright and license details. */
#include "common.h"
#ifndef TEST
size_t
librecrypt_settings_prefix(const char *hash, size_t *hashsize_out, LIBRECRYPT_CONTEXT *ctx)
{
size_t i, len, ret = 0u;
size_t last_offset = 0u;
const struct librecrypt_algorithm *algo;
uintmax_t hashsize;
/* Find last algorithm, and beginning of result */
for (i = 0u; hash[i]; i++) {
if (hash[i] == LIBRECRYPT_HASH_COMPOSITION_DELIMITER)
ret = i + 1u;
else if (hash[i] == LIBRECRYPT_ALGORITHM_LINK_DELIMITER)
last_offset = ret = i + 1u;
}
/* and get `strlen(hash)` */
len = i;
/* Special case for bsdicrypt */
if (ret == last_offset && ret < len && hash[ret] == '_')
ret += 1u;
/* Return if hash size is not required */
if (!hashsize_out)
goto out;
/* Return 0 as hash size if default is specified */
if (ret == i)
goto zero;
/* Return 0 as hash size if algorithm cannot be identified or has fixed hash size */
algo = librecrypt_find_first_algorithm_(&hash[last_offset], len - last_offset, ctx);
if (!algo)
goto zero;
if (!algo->flexible_hash_size)
goto zero;
/* Get the hash size */
if (!librecrypt_scan_settings(&hash[ret], len - ret, "%^b",
&hashsize, (uintmax_t)1u, (uintmax_t)SIZE_MAX,
algo->decoding_lut, algo->pad, algo->strict_pad))
goto zero;
*hashsize_out = (size_t)hashsize;
goto out;
zero:
*hashsize_out = 0u;
out:
return ret;
}
#else
# ifndef FUZZ
#define CHECK_NULL(PREFIX, SUFFIX)\
do {\
EXPECT(librecrypt_settings_prefix(PREFIX SUFFIX, NULL, ctx) == sizeof(PREFIX) - 1u);\
EXPECT(librecrypt_settings_prefix(PREFIX, NULL, ctx) == sizeof(PREFIX) - 1u); \
} while (0)
#define CHECK_ZERO(PREFIX, SUFFIX)\
do {\
size_t hashsize = 99999u;\
EXPECT(librecrypt_settings_prefix(PREFIX SUFFIX, &hashsize, ctx) == sizeof(PREFIX) - 1u);\
EXPECT(hashsize == 0u);\
} while (0)
#define CHECK_HASH(PREFIX, SUFFIX, HASH)\
do {\
size_t hashsize = 99999u;\
EXPECT(librecrypt_settings_prefix(PREFIX SUFFIX, &hashsize, ctx) == sizeof(PREFIX) - 1u);\
EXPECT(hashsize == HASH##u);\
} while (0)
static unsigned
dumdum_is_algorithm(const char *settings, size_t len)
{
(void) settings;
(void) len;
return 1u;
}
static struct librecrypt_algorithm dumdum = {
.is_algorithm = &dumdum_is_algorithm,
.flexible_hash_size = 0
};
int
main(void)
{
LIBRECRYPT_CONTEXT *ctx = NULL;
SET_UP_ALARM();
INIT_RESOURCE_TEST();
/* Simple cases */
CHECK_NULL("", "result");
CHECK_NULL(">", "double-des result");
CHECK_NULL("$", "x");
CHECK_NULL("y$", "x");
CHECK_NULL("y>", "x");
CHECK_NULL("a$b$c>d$e$", "x");
CHECK_NULL("a$b$c>", "x");
/* Discard asterisk-notation */
CHECK_NULL("", "*10");
CHECK_NULL(">", "*11");
CHECK_NULL("$", "*12");
CHECK_NULL("y$", "*13");
CHECK_NULL("y>", "*012");
CHECK_NULL("a$b$c>d$e$", "*1");
CHECK_NULL("a$b$c>", "*2");
CHECK_NULL("a$b$c>*10$", "*2");
/* Special case: bsdicrypt */
CHECK_NULL("_", "res");
CHECK_NULL("_", "");
CHECK_NULL("$x$*10>_", "_");
/* Check without hash */
CHECK_ZERO("a$b$", "");
CHECK_ZERO("a$b$>", "");
CHECK_ZERO("a$b$x>", "");
CHECK_ZERO("a$b$*10>", "");
/* Check without invalid algorithm */
CHECK_ZERO("$~no~such~algorithm~$", "hash");
/* Check without hash and hashlen */
#if defined(SUPPORT_ARGON2I)
CHECK_HASH("$argon2i$m=8,t=1,p=1$*99$", "*100", 100);
CHECK_HASH("x$*99>$argon2i$m=8,t=1,p=1$*99$", "*100", 100);
CHECK_HASH("$argon2i$m=8,t=1,p=1$*99$", "NineByteHash", 9);
CHECK_HASH("x$*99>$argon2i$m=8,t=1,p=1$*99$", "NineByteHash", 9);
#endif
#if defined(SUPPORT_ARGON2ID)
CHECK_HASH("$argon2id$m=8,t=1,p=1$*99$", "*100", 100);
CHECK_HASH("x$*99>$argon2id$m=8,t=1,p=1$*99$", "*100", 100);
CHECK_HASH("$argon2id$m=8,t=1,p=1$*99$", "NineByteHash", 9);
CHECK_HASH("x$*99>$argon2id$m=8,t=1,p=1$*99$", "NineByteHash", 9);
#endif
#if defined(SUPPORT_ARGON2D)
CHECK_HASH("$argon2d$m=8,t=1,p=1$*99$", "*100", 100);
CHECK_HASH("x$*99>$argon2d$m=8,t=1,p=1$*99$", "*100", 100);
CHECK_HASH("$argon2d$m=8,t=1,p=1$*99$", "NineByteHash", 9);
CHECK_HASH("x$*99>$argon2d$m=8,t=1,p=1$*99$", "NineByteHash", 9);
#endif
#if defined(SUPPORT_ARGON2DS)
CHECK_HASH("$argon2ds$m=8,t=1,p=1$*99$", "*100", 100);
CHECK_HASH("x$*99>$argon2ds$m=8,t=1,p=1$*99$", "*100", 100);
CHECK_HASH("$argon2ds$m=8,t=1,p=1$*99$", "NineByteHash", 9);
CHECK_HASH("x$*99>$argon2ds$m=8,t=1,p=1$*99$", "NineByteHash", 9);
#endif
/* Check without invalid hash */
IF__argon2i__SUPPORTED(CHECK_ZERO("$argon2i$m=8,t=1,p=1$*99$", "#");)
IF__argon2d__SUPPORTED(CHECK_ZERO("$argon2d$m=8,t=1,p=1$*99$", "#");)
IF__argon2id__SUPPORTED(CHECK_ZERO("$argon2id$m=8,t=1,p=1$*99$", "#");)
IF__argon2ds__SUPPORTED(CHECK_ZERO("$argon2ds$m=8,t=1,p=1$*99$", "#");)
/* Test without flexible hash size (but with context I guess) */
ctx = librecrypt_create_context();
assert(ctx != NULL);
librecrypt_set_custom_algorithms(ctx, &dumdum, 1u);
CHECK_ZERO("$dumdum$", "abcd");
librecrypt_free_context(ctx);
STOP_RESOURCE_TEST();
return 0;
}
# else
int
LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
{
char *hash;
size_t r;
hash = malloc(size + 1u);
assert(hash);
memcpy(hash, data, size);
hash[size] = '\0';
r = librecrypt_settings_prefix(hash, &(size_t){0u}, NULL);
EXPECT(librecrypt_settings_prefix(hash, NULL, NULL) == r);
free(hash);
return 0;
}
# endif
#endif
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