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update RNG_HealthTest to output generated bits

This commit is contained in:
Chris Conlon 2014-10-31 14:05:13 -06:00
parent bb8853aa50
commit 2fe0d9b38d
3 changed files with 28 additions and 15 deletions
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21
ctaocrypt/src/random.c
View File

@ -456,10 +456,18 @@ int FreeRng(RNG* rng)
int RNG_HealthTest(int reseed, const byte* entropyA, word32 entropyASz,
const byte* entropyB, word32 entropyBSz,
const byte* output, word32 outputSz)
byte* output, word32 outputSz)
{
DRBG drbg;
byte check[SHA256_DIGEST_SIZE * 4];
if (entropyA == NULL || output == NULL)
return BAD_FUNC_ARG;
if (reseed != 0 && entropyB == NULL)
return BAD_FUNC_ARG;
if (outputSz != (SHA256_DIGEST_SIZE * 4))
return -1;
if (Hash_DRBG_Instantiate(&drbg, entropyA, entropyASz, NULL, 0) != 0)
return -1;
@ -471,17 +479,12 @@ int RNG_HealthTest(int reseed, const byte* entropyA, word32 entropyASz,
}
}
if (Hash_DRBG_Generate(&drbg, check, sizeof(check)) != 0) {
if (Hash_DRBG_Generate(&drbg, output, outputSz) != 0) {
Hash_DRBG_Uninstantiate(&drbg);
return -1;
}
if (Hash_DRBG_Generate(&drbg, check, sizeof(check)) != 0) {
Hash_DRBG_Uninstantiate(&drbg);
return -1;
}
if (outputSz != sizeof(check) || XMEMCMP(output, check, sizeof(check))) {
if (Hash_DRBG_Generate(&drbg, output, outputSz) != 0) {
Hash_DRBG_Uninstantiate(&drbg);
return -1;
}

18
ctaocrypt/test/test.c
View File

@ -2884,16 +2884,26 @@ int random_test(void)
0x82, 0xc9, 0x55, 0xa8, 0x19, 0x69, 0xe0, 0x69, 0xfa, 0x8c, 0xe0, 0x07,
0xa1, 0x80, 0x18, 0x3a, 0x07, 0xdf, 0xae, 0x17
};
byte output[SHA256_DIGEST_SIZE * 4];
int ret;
ret = RNG_HealthTest(0, test1Entropy, sizeof(test1Entropy), NULL, 0,
test1Output, sizeof(test1Output));
if (ret != 0) return -39;
output, sizeof(output));
if (ret != 0)
return -39;
if (XMEMCMP(test1Output, output, sizeof(output)) != 0)
return -40;
ret = RNG_HealthTest(1, test2EntropyA, sizeof(test2EntropyA),
test2EntropyB, sizeof(test2EntropyB),
test2Output, sizeof(test2Output));
if (ret != 0) return -40;
output, sizeof(output));
if (ret != 0)
return -41;
if (XMEMCMP(test2Output, output, sizeof(output)) != 0)
return -42;
return 0;
}

4
cyassl/ctaocrypt/random.h
View File

@ -122,7 +122,7 @@ CYASSL_API int RNG_GenerateByte(RNG*, byte*);
CYASSL_API int RNG_HealthTest(int reseed,
const byte* entropyA, word32 entropyASz,
const byte* entropyB, word32 entropyBSz,
const byte* output, word32 outputSz);
byte* output, word32 outputSz);
#endif /* HAVE_HASHDRBG || NO_RC4 */
@ -134,7 +134,7 @@ CYASSL_API int RNG_GenerateByte(RNG*, byte*);
CYASSL_API int RNG_HealthTest_fips(int reseed,
const byte* entropyA, word32 entropyASz,
const byte* entropyB, word32 entropyBSz,
const byte* output, word32 outputSz);
byte* output, word32 outputSz);
#ifndef FIPS_NO_WRAPPERS
/* if not impl or fips.c impl wrapper force fips calls if fips build */
#define InitRng InitRng_fips