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/* See LICENSE file for copyright and license details. */
#include "common.h"
#ifndef TEST
const void *
librecrypt_get_encoding(const char *settings, size_t len, char *pad_out, int *strict_pad_out,
int decoding, LIBRECRYPT_CONTEXT *ctx)
{
size_t i, start = 0u;
const struct librecrypt_algorithm *algo;
/* Find last algorithm in the chain */
for (i = 0u; i < len; i++)
if (settings[i] == LIBRECRYPT_ALGORITHM_LINK_DELIMITER)
start = i + 1u;
settings = &settings[start];
len -= start;
/* Identify the algorithm */
algo = librecrypt_find_first_algorithm_(settings, len, ctx);
if (!algo) {
errno = ENOSYS;
return NULL;
}
/* Return the algorithms salt/hash encoding format */
*pad_out = algo->pad;
*strict_pad_out = algo->strict_pad;
if (decoding)
return algo->decoding_lut;
else
return algo->encoding_lut;
}
#else
# ifndef FUZZ
#define ALPHABET "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"
#define ALT_ALPHABET "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ+/"
NONSTRING static const char encoding_lut[256u] = MAKE_ENCODING_LUT(ALPHABET);
NONSTRING static const char alt_encoding_lut[256u] = MAKE_ENCODING_LUT(ALT_ALPHABET);
static const unsigned char decoding_lut[256u] = {
XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX,
XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX,
XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, 62, XX, XX, XX, 63,
52, 53, 54, 55, 56, 57, 58, 59, 60, 61, XX, XX, XX, XX, XX, XX,
XX, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, XX, XX, XX, XX, XX,
XX, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, XX, XX, XX, XX, XX,
XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX,
XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX,
XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX,
XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX,
XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX,
XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX,
XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX,
XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX
};
static const unsigned char alt_decoding_lut[256u] = {
XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX,
XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX,
XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, 62, XX, XX, XX, 63,
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, XX, XX, XX, XX, XX, XX,
XX, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50,
51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, XX, XX, XX, XX, XX,
XX, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24,
25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, XX, XX, XX, XX, XX,
XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX,
XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX,
XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX,
XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX,
XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX,
XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX,
XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX,
XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX
};
static unsigned
rot4_is_algorithm(const char *settings, size_t len)
{
if (len >= sizeof("$rot4$") - 1u)
if (!strncmp(settings, "$rot4$", sizeof("$rot4$") - 1u))
return 1u;
return 0u;
}
static unsigned
trunc_is_algorithm(const char *settings, size_t len)
{
if (len >= sizeof("$trunc$") - 1u)
if (!strncmp(settings, "$trunc$", sizeof("$trunc$") - 1u))
return 1u;
return 0u;
}
static const struct librecrypt_algorithm rot4_algo = {
.is_algorithm = &rot4_is_algorithm,
.encoding_lut = encoding_lut,
.decoding_lut = decoding_lut,
.hash_size = 8u,
.flexible_hash_size = 0,
.strict_pad = 1,
.pad = '#'
};
static const struct librecrypt_algorithm trunc_algo = {
.is_algorithm = &trunc_is_algorithm,
.encoding_lut = alt_encoding_lut,
.decoding_lut = alt_decoding_lut,
.hash_size = 4u,
.flexible_hash_size = 1,
.strict_pad = 1,
.pad = '@'
};
#define NSA "$~no~such~algorithm~$"
static int
check_encoding_lut(const char *lut, const char *alpha)
{
size_t i;
for (i = 0u; i < 256u; i++)
if (lut[i] != alpha[i % 64u])
return 0;
return 1;
}
static int
check_decoding_lut(const unsigned char *lut, const char *alpha)
{
size_t i, invalid_count = 0u;
for (i = 0u; i < 64u; i++)
if (lut[(unsigned char)alpha[i]] != (unsigned char)i)
return 0;
for (i = 0u; i < 256u; i++) {
if (lut[i] == 0xFFu)
invalid_count += 1u;
else
EXPECT(lut[i] < 64u);
}
return invalid_count == 256u - 64u;
}
#define CHECK(PREFIX, ALPHABET, PAD, STRICT_PAD) \
do {\
pad = (char)~(PAD);\
strict_pad = -1;\
elut = librecrypt_get_encoding(PREFIX, sizeof(PREFIX) - 1u, &pad, &strict_pad, 0, ctx);\
EXPECT(elut != NULL);\
EXPECT(pad == (PAD));\
EXPECT(strict_pad == (STRICT_PAD));\
EXPECT(check_encoding_lut(elut, ALPHABET));\
\
pad = (char)~(PAD);\
strict_pad = -1;\
dlut = librecrypt_get_encoding(PREFIX, sizeof(PREFIX) - 1u, &pad, &strict_pad, 1, ctx);\
EXPECT(dlut != NULL);\
EXPECT(pad == (PAD));\
EXPECT(strict_pad == (STRICT_PAD));\
EXPECT(check_decoding_lut(dlut, ALPHABET));\
\
pad = (char)~(PAD);\
strict_pad = -1;\
elut = librecrypt_get_encoding(NSA">"PREFIX, sizeof(NSA">"PREFIX) - 1u, &pad, &strict_pad, 0, ctx);\
EXPECT(elut != NULL);\
EXPECT(pad == (PAD));\
EXPECT(strict_pad == (STRICT_PAD));\
EXPECT(check_encoding_lut(elut, ALPHABET));\
} while (0)
#define DIGIT "0123456789"
#define LOWER "abcdefghijklmnopqrstuvwxyz"
#define UPPER "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
int
main(void)
{
const struct librecrypt_algorithm custom[] = {rot4_algo, trunc_algo};
LIBRECRYPT_CONTEXT *ctx = NULL;
const char *elut;
const unsigned char *dlut;
char pad;
int strict_pad;
SET_UP_ALARM();
INIT_RESOURCE_TEST();
errno = 0;
EXPECT(librecrypt_get_encoding(NSA, sizeof(NSA) - 1u, &pad, &strict_pad, 0, ctx) == NULL);
EXPECT(errno == ENOSYS);
errno = 0;
EXPECT(librecrypt_get_encoding(NSA, sizeof(NSA) - 1u, &pad, &strict_pad, 1, ctx) == NULL);
EXPECT(errno == ENOSYS);
errno = 0;
EXPECT(librecrypt_get_encoding(">"NSA, sizeof(">"NSA) - 1u, &pad, &strict_pad, 0, ctx) == NULL);
EXPECT(errno == ENOSYS);
errno = 0;
EXPECT(librecrypt_get_encoding(">"NSA, sizeof(">"NSA) - 1u, &pad, &strict_pad, 1, ctx) == NULL);
EXPECT(errno == ENOSYS);
IF__argon2i_v1_0__SUPPORTED(CHECK("$argon2i$", UPPER LOWER DIGIT "+/", '=', 0);)
IF__argon2d_v1_0__SUPPORTED(CHECK("$argon2d$", UPPER LOWER DIGIT "+/", '=', 0);)
IF__argon2id_v1_0__SUPPORTED(CHECK("$argon2id$", UPPER LOWER DIGIT "+/", '=', 0);)
IF__argon2ds_v1_0__SUPPORTED(CHECK("$argon2ds$", UPPER LOWER DIGIT "+/", '=', 0);)
IF__argon2i_v1_3__SUPPORTED(CHECK("$argon2i$v=19$", UPPER LOWER DIGIT "+/", '=', 0);)
IF__argon2d_v1_3__SUPPORTED(CHECK("$argon2d$v=19$", UPPER LOWER DIGIT "+/", '=', 0);)
IF__argon2id_v1_3__SUPPORTED(CHECK("$argon2id$v=19$", UPPER LOWER DIGIT "+/", '=', 0);)
IF__argon2ds_v1_3__SUPPORTED(CHECK("$argon2ds$v=19$", UPPER LOWER DIGIT "+/", '=', 0);)
ctx = librecrypt_create_context();
assert(ctx != NULL);
librecrypt_set_custom_algorithms(ctx, custom, ELEMSOF(custom));
CHECK("$rot4$", ALPHABET, '#', 1);
CHECK("$trunc$", ALT_ALPHABET, '@', 1);
CHECK("$trunc$*4", ALT_ALPHABET, '@', 1);
CHECK("$rot4$>$trunc$", ALT_ALPHABET, '@', 1);
CHECK("$rot4$>$trunc$*4", ALT_ALPHABET, '@', 1);
CHECK("$trunc$>$rot4$", ALPHABET, '#', 1);
CHECK("$trunc$*4>$rot4$", ALPHABET, '#', 1);
librecrypt_free_context(ctx);
STOP_RESOURCE_TEST();
return 0;
}
# else
extern const void *volatile discarded_return_value;
const void *volatile discarded_return_value;
int
LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
{
const char *settings;
int decoding;
if (size < 1u)
return 0;
decoding = (int)data[0u] & 1;
settings = (const void *)&data[1u];
size -= 1u;
discarded_return_value = librecrypt_get_encoding(settings, size, &(char){0}, &(int){0}, decoding, NULL);
return 0;
}
# endif
#endif
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