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Code Issues 1 Releases Wiki Activity

Add incremental SHA3

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This commit is contained in:
Joost Rijneveld 2019-03-07 16:35:27 +01:00
parent 23178c4c32
commit 760b5926c4
No known key found for this signature in database
GPG Key ID: A4FE39CF49CBC553
3 changed files with 92 additions and 0 deletions
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38
common/fips202.c
View File

@ -675,6 +675,25 @@ void shake256(uint8_t *output, size_t outlen,
}
}
void sha3_256_inc_init(uint64_t *s_inc) {
keccak_inc_init(s_inc);
}
void sha3_256_inc_absorb(uint64_t *s_inc, const uint8_t *input, size_t inlen) {
keccak_inc_absorb(s_inc, SHA3_256_RATE, input, inlen);
}
void sha3_256_inc_finalize(uint8_t *output, uint64_t *s_inc) {
uint8_t t[SHA3_256_RATE];
keccak_inc_finalize(s_inc, SHA3_256_RATE, 0x06);
keccak_squeezeblocks(t, 1, s_inc, SHA3_256_RATE);
for (size_t i = 0; i < 32; i++) {
output[i] = t[i];
}
}
/*************************************************
* Name: sha3_256
*
@ -699,6 +718,25 @@ void sha3_256(uint8_t *output, const uint8_t *input, size_t inlen) {
}
}
void sha3_512_inc_init(uint64_t *s_inc) {
keccak_inc_init(s_inc);
}
void sha3_512_inc_absorb(uint64_t *s_inc, const uint8_t *input, size_t inlen) {
keccak_inc_absorb(s_inc, SHA3_512_RATE, input, inlen);
}
void sha3_512_inc_finalize(uint8_t *output, uint64_t *s_inc) {
uint8_t t[SHA3_512_RATE];
keccak_inc_finalize(s_inc, SHA3_512_RATE, 0x06);
keccak_squeezeblocks(t, 1, s_inc, SHA3_512_RATE);
for (size_t i = 0; i < 32; i++) {
output[i] = t[i];
}
}
/*************************************************
* Name: sha3_512
*

9
common/fips202.h
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@ -32,7 +32,16 @@ void shake128(uint8_t *output, size_t outlen,
void shake256(uint8_t *output, size_t outlen,
const uint8_t *input, size_t inlen);
void sha3_256_inc_init(uint64_t *s_inc);
void sha3_256_inc_absorb(uint64_t *s_inc, const uint8_t *input, size_t inlen);
void sha3_256_inc_finalize(uint8_t *output, uint64_t *s_inc);
void sha3_256(uint8_t *output, const uint8_t *input, size_t inlen);
void sha3_512_inc_init(uint64_t *s_inc);
void sha3_512_inc_absorb(uint64_t *s_inc, const uint8_t *input, size_t inlen);
void sha3_512_inc_finalize(uint8_t *output, uint64_t *s_inc);
void sha3_512(uint8_t *output, const uint8_t *input, size_t inlen);
#endif

45
test/common/fips202.c
View File

@ -52,6 +52,50 @@ const unsigned char expected[512] = {
0x6b, 0xf5, 0xf6, 0x0b, 0x21, 0xb5, 0x82, 0x2d
};
static int test_sha3_256_incremental(void) {
unsigned char input[512];
unsigned char check[512];
unsigned char output[512];
uint64_t s_inc[26];
int i;
int absorbed;
int returncode = 0;
for (i = 0; i < 512; i++) {
input[i] = i;
}
sha3_256(check, input, 512);
sha3_256_inc_init(s_inc);
absorbed = 0;
for (i = 0; i < 512 && absorbed + i <= 512; i++) {
sha3_256_inc_absorb(s_inc, input + absorbed, i);
absorbed += i;
}
sha3_256_inc_absorb(s_inc, input + absorbed, 512 - absorbed);
sha3_256_inc_finalize(output, s_inc);
if (memcmp(check, output, 512)) {
printf("ERROR sha3_256 incremental did not match sha3_256.\n");
printf(" Expected: ");
for (i = 0; i < 512; i++) {
printf("%02X", check[i]);
}
printf("\n");
printf(" Received: ");
for (i = 0; i < 512; i++) {
printf("%02X", output[i]);
}
printf("\n");
returncode = 1;
}
return returncode;
}
static int test_shake128_incremental(void) {
unsigned char input[512];
unsigned char check[512];
@ -228,6 +272,7 @@ int main(void) {
int result = 0;
result += test_shake128();
result += test_shake128_incremental();
result += test_sha3_256_incremental();
if (result != 0) {
puts("Errors occurred");