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Merge pull request #7992 from ejohnstown/ecc-pct-ss 

Small Stack ECC Pairwise Consistency Test
pull/8000/head
JacobBarthelmeh 2024-09-20 09:13:21 -06:00 committed by GitHub
parent 005a57f745 a81efc0f6f
commit bddb83b62a
No known key found for this signature in database
GPG Key ID: B5690EEEBB952194
1 changed files with 14 additions and 4 deletions
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18
wolfcrypt/src/ecc.c
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@ -10228,23 +10228,31 @@ static int _ecc_pairwise_consistency_test(ecc_key* key, WC_RNG* rng)
}
if (!err && (flags & WC_ECC_FLAG_DEC_SIGN)) {
#ifndef WOLFSSL_SMALL_STACK
byte sig[MAX_ECC_BYTES + WC_SHA256_DIGEST_SIZE];
#else
byte* sig;
#endif
byte* digest;
word32 sigLen, digestLen;
int dynRng = 0, res = 0;
sigLen = (word32)wc_ecc_sig_size(key);
digestLen = WC_SHA256_DIGEST_SIZE;
sig = (byte*)XMALLOC(sigLen + digestLen, NULL, DYNAMIC_TYPE_ECC);
#ifdef WOLFSSL_SMALL_STACK
sig = (byte*)XMALLOC(sigLen + digestLen, key->heap, DYNAMIC_TYPE_ECC);
if (sig == NULL)
return MEMORY_E;
#endif
digest = sig + sigLen;
if (rng == NULL) {
dynRng = 1;
rng = wc_rng_new(NULL, 0, NULL);
rng = wc_rng_new(NULL, 0, key->heap);
if (rng == NULL) {
XFREE(sig, NULL, DYNAMIC_TYPE_ECC);
#ifdef WOLFSSL_SMALL_STACK
XFREE(sig, key->heap, DYNAMIC_TYPE_ECC);
#endif
return MEMORY_E;
}
}
@ -10265,7 +10273,9 @@ static int _ecc_pairwise_consistency_test(ecc_key* key, WC_RNG* rng)
wc_rng_free(rng);
}
ForceZero(sig, sigLen + digestLen);
XFREE(sig, NULL, DYNAMIC_TYPE_ECC);
#ifdef WOLFSSL_SMALL_STACK
XFREE(sig, key->heap, DYNAMIC_TYPE_ECC);
#endif
}
(void)rng;