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RSA/DH: check for even modulus

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This commit is contained in:
Sean Parkinson
2022-02-23 09:51:15 +10:00
parent fef8a57eb2
commit b5ed5c9b99
2 changed files with 14 additions and 1 deletions
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12
wolfcrypt/src/dh.c
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@ -1208,6 +1208,10 @@ static int GeneratePrivateDh(DhKey* key, WC_RNG* rng, byte* priv,
int ret = 0;
word32 sz = 0;
if (mp_iseven(&key->p) == MP_YES) {
ret = MP_VAL;
}
else
#ifndef WOLFSSL_NO_DH186
if (mp_iszero(&key->q) == MP_NO) {
@ -1215,7 +1219,8 @@ static int GeneratePrivateDh(DhKey* key, WC_RNG* rng, byte* priv,
* Generation Using Extra Random Bits" */
ret = GeneratePrivateDh186(key, rng, priv, privSz);
} else
}
else
#endif
{
@ -1793,6 +1798,8 @@ static int _ffc_pairwise_consistency_test(DhKey* key,
if (key == NULL || pub == NULL || priv == NULL)
return BAD_FUNC_ARG;
if (mp_iseven(&key->p) == MP_YES)
return MP_VAL;
#ifdef WOLFSSL_SMALL_STACK
publicKey = (mp_int*)XMALLOC(sizeof(mp_int), key->heap, DYNAMIC_TYPE_DH);
@ -1957,6 +1964,9 @@ static int wc_DhAgree_Sync(DhKey* key, byte* agree, word32* agreeSz,
#endif
#endif
if (mp_iseven(&key->p) == MP_YES) {
return MP_VAL;
}
#ifdef WOLFSSL_VALIDATE_FFC_IMPORT
if (wc_DhCheckPrivKey(key, priv, privSz) != 0) {
WOLFSSL_MSG("wc_DhAgree wc_DhCheckPrivKey failed");

3
wolfcrypt/src/rsa.c
View File

@ -2258,6 +2258,9 @@ static int wc_RsaFunctionSync(const byte* in, word32 inLen, byte* out,
word32 keyLen = 0;
#endif
if (mp_iseven(&key->n)) {
return MP_VAL;
}
#ifdef WOLFSSL_HAVE_SP_RSA
#ifndef WOLFSSL_SP_NO_2048
if (mp_count_bits(&key->n) == 2048) {