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/* See LICENSE file for copyright and license details. */
#include "common.h"
#ifndef TEST
int
librecrypt_test_supported(const char *phrase, size_t len, int text, const char *settings, LIBRECRYPT_CONTEXT *ctx)
{
const struct librecrypt_algorithm *algo;
size_t n;
/* For each chained algorithm */
for (;;) {
/* Measure until next '>' */
for (n = 0u; settings[n]; n++)
if (settings[n] == LIBRECRYPT_ALGORITHM_LINK_DELIMITER)
break;
/* Identify algorithm */
algo = librecrypt_find_first_algorithm_(settings, n, ctx);
if (!algo)
return 0;
/* Check configuration and input support, and get hash size */
if (!(*algo->test_supported)(phrase, len, text, settings, n, &len))
return 0;
/* Return if just processed last chained algorithm */
if (!settings[n])
return 1;
/* Hashes are binary */
phrase = NULL;
text = 0;
/* Go to next algorithm */
settings = &settings[n]; /* conf */
settings++; /* '>' */
}
}
#else
# ifndef FUZZ
#define ALPHABET "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"
NONSTRING static const char encoding_lut[256u] = MAKE_ENCODING_LUT(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 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 int
rot4_supported(const char *phrase, size_t len, int text, const char *settings,
size_t prefix, size_t *len_out)
{
size_t i, j, n;
(void) phrase;
(void) len;
(void) text;
i = sizeof("$rot4$") - 1u;
if (prefix < i || memcmp(settings, "$rot4$", prefix))
return 0;
n = i - prefix;
if (n && n != 12u)
return 0;
if (n == 12u) {
for (j = 0u; j < 11u; j++, i++)
if (decoding_lut[(unsigned char)settings[i]] == XX)
return 0;
if (decoding_lut[(unsigned char)settings[i]] != '#')
return 0;
}
*len_out = 8u;
return 1;
}
static int
trunc_supported(const char *phrase, size_t len, int text, const char *settings,
size_t prefix, size_t *len_out)
{
size_t i, digit, n = 0u, q, r;
(void) phrase;
(void) len;
(void) text;
if (prefix < sizeof("$trunc$") - 1u || memcmp(settings, "$trunc$", sizeof("$trunc$") - 1u))
return 0;
if (prefix == sizeof("$trunc$") - 1u) {
*len_out = 4u;
return 1;
}
if (settings[sizeof("$trunc$") - 1u] == '*') {
for (i = sizeof("$trunc$*") - 1u; i < prefix; i++) {
if ('0' > settings[i] || settings[i] > '9')
return 0;
digit = (size_t)(settings[i] - '0');
if (n > (SIZE_MAX - digit) / 10u)
return 0;
n = n * 10u + digit;
}
} else {
for (i = sizeof("$trunc$") - 1u; i < prefix; i++) {
if (settings[i] == '@')
break;
if (decoding_lut[(unsigned char)settings[i]] == XX)
return 0;
n += 1u;
}
q = n / 4u;
r = n % 4u;
if (r == 1u)
return 0;
n = q * 3u + r;
if (r) {
n -= 1u;
for (; r < 4u && i < prefix; r++, i++)
if (settings[i] != '@')
break;
if (r != 4u || i != prefix)
return 0;
}
}
if (!n)
return 0;
*len_out = n;
return 1;
}
static const struct librecrypt_algorithm rot4_algo = {
.is_algorithm = &rot4_is_algorithm,
.test_supported = &rot4_supported,
.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,
.test_supported = &trunc_supported,
.encoding_lut = encoding_lut,
.decoding_lut = decoding_lut,
.hash_size = 4u,
.flexible_hash_size = 1,
.strict_pad = 1,
.pad = '@'
};
#define NSA "$~no~such~algorithm~$"
#define CHECK(ALGO, VALID, INVALID)\
do {\
EXPECT(librecrypt_test_supported(NULL, 4096u, 0, ALGO VALID, ctx) == 1);\
EXPECT(librecrypt_test_supported(NULL, 4096u, 0, ALGO VALID">"NSA, ctx) == 0);\
EXPECT(librecrypt_test_supported(NULL, 4096u, 0, NSA">"ALGO VALID, ctx) == 0);\
EXPECT(librecrypt_test_supported(NULL, 4096u, 0, ALGO VALID">"ALGO VALID, ctx) == 1);\
EXPECT(librecrypt_test_supported(NULL, 4096u, 0, ALGO INVALID, ctx) == 0);\
} while (0)
int
main(void)
{
const struct librecrypt_algorithm custom[] = {rot4_algo, trunc_algo};
LIBRECRYPT_CONTEXT *ctx = NULL;
SET_UP_ALARM();
INIT_RESOURCE_TEST();
EXPECT(librecrypt_test_supported("abcdefgh", 8u, 1, NSA, NULL) == 0);
EXPECT(librecrypt_test_supported("abcdefgh", 8u, 1, NSA">", NULL) == 0);
EXPECT(librecrypt_test_supported("abcdefgh", 8u, 1, ">"NSA, NULL) == 0);
EXPECT(librecrypt_test_supported("abcdefgh", 8u, 1, NSA">"NSA, NULL) == 0);
IF__argon2i_v1_3__SUPPORTED(CHECK("$argon2i$v=19$", "m=8,t=1,p=1$*16$*40", "m=0,t=0,p=0$*1$*1"));
IF__argon2d_v1_3__SUPPORTED(CHECK("$argon2d$v=19$", "m=8,t=1,p=1$*16$*40", "m=0,t=0,p=0$*1$*1"));
IF__argon2id_v1_3__SUPPORTED(CHECK("$argon2id$v=19$", "m=8,t=1,p=1$*16$*40", "m=0,t=0,p=0$*1$*1"));
IF__argon2ds_v1_3__SUPPORTED(CHECK("$argon2ds$v=19$", "m=8,t=1,p=1$*16$*40", "m=0,t=0,p=0$*1$*1"));
IF__argon2i_v1_0__SUPPORTED(CHECK("$argon2i$v=16$", "m=8,t=1,p=1$*16$*40", "m=0,t=0,p=0$*1$*1"));
IF__argon2d_v1_0__SUPPORTED(CHECK("$argon2d$v=16$", "m=8,t=1,p=1$*16$*40", "m=0,t=0,p=0$*1$*1"));
IF__argon2id_v1_0__SUPPORTED(CHECK("$argon2id$v=16$", "m=8,t=1,p=1$*16$*40", "m=0,t=0,p=0$*1$*1"));
IF__argon2ds_v1_0__SUPPORTED(CHECK("$argon2ds$v=16$", "m=8,t=1,p=1$*16$*40", "m=0,t=0,p=0$*1$*1"));
IF__argon2i_v1_0__SUPPORTED(CHECK("$argon2i$", "m=8,t=1,p=1$*16$*40", "m=0,t=0,p=0$*1$*1"));
IF__argon2d_v1_0__SUPPORTED(CHECK("$argon2d$", "m=8,t=1,p=1$*16$*40", "m=0,t=0,p=0$*1$*1"));
IF__argon2id_v1_0__SUPPORTED(CHECK("$argon2id$", "m=8,t=1,p=1$*16$*40", "m=0,t=0,p=0$*1$*1"));
IF__argon2ds_v1_0__SUPPORTED(CHECK("$argon2ds$", "m=8,t=1,p=1$*16$*40", "m=0,t=0,p=0$*1$*1"));
ctx = librecrypt_create_context();
assert(ctx != NULL);
librecrypt_set_custom_algorithms(ctx, custom, ELEMSOF(custom));
CHECK("$rot4$", "", "x");
CHECK("$trunc$", "", "*0");
CHECK("$trunc$", "*6", "*0");
EXPECT(librecrypt_test_supported(NULL, 4096u, 0, "$rot4$>$trunc$", ctx) == 1);
EXPECT(librecrypt_test_supported(NULL, 4096u, 0, "$rot4$>$trunc$*8", ctx) == 1);
EXPECT(librecrypt_test_supported(NULL, 4096u, 0, "$trunc$*6>$rot4$", ctx) == 1);
EXPECT(librecrypt_test_supported(NULL, 4096u, 0, "$trunc$>$rot4$", ctx) == 1);
librecrypt_free_context(ctx);
STOP_RESOURCE_TEST();
return 0;
}
# else
extern volatile int discarded_return_value;
volatile int discarded_return_value;
int
LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
{
const void *phrase;
size_t len;
int text;
char *settings;
if (size < 4u)
return 0;
text = (int)data[0u] & 1;
len = (size_t)data[1u];
if (len > size - 2u)
return 0;
phrase = &data[2u];
data = &data[2u + len];
size -= 2u + len;
settings = malloc(size + 1u);
assert(settings);
memcpy(settings, data, size);
settings[size] = '\0';
discarded_return_value = librecrypt_test_supported(phrase, len, text, settings, NULL);
free(settings);
return 0;
}
# endif
#endif
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