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Only use SP for RSA private operations if P and Q half bits

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This commit is contained in:
Sean Parkinson
2020-05-07 08:46:48 +10:00
parent be3c39ed1c
commit c4af5db4b9
1 changed files with 27 additions and 15 deletions
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42
wolfcrypt/src/rsa.c
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@ -2038,12 +2038,16 @@ static int wc_RsaFunctionSync(const byte* in, word32 inLen, byte* out,
return MISSING_RNG_E;
#endif
#ifndef RSA_LOW_MEM
return sp_RsaPrivate_2048(in, inLen, &key->d, &key->p, &key->q,
&key->dP, &key->dQ, &key->u, &key->n,
out, outLen);
if ((mp_count_bits(&key->p) == 1024) &&
(mp_count_bits(&key->q) == 1024)) {
return sp_RsaPrivate_2048(in, inLen, &key->d, &key->p, &key->q,
&key->dP, &key->dQ, &key->u, &key->n,
out, outLen);
}
break;
#else
return sp_RsaPrivate_2048(in, inLen, &key->d, &key->p, &key->q,
NULL, NULL, NULL, &key->n, out, outLen);
return sp_RsaPrivate_2048(in, inLen, &key->d, NULL, NULL, NULL,
NULL, NULL, &key->n, out, outLen);
#endif
#endif
case RSA_PUBLIC_ENCRYPT:
@ -2063,12 +2067,16 @@ static int wc_RsaFunctionSync(const byte* in, word32 inLen, byte* out,
return MISSING_RNG_E;
#endif
#ifndef RSA_LOW_MEM
return sp_RsaPrivate_3072(in, inLen, &key->d, &key->p, &key->q,
&key->dP, &key->dQ, &key->u, &key->n,
out, outLen);
if ((mp_count_bits(&key->p) == 1536) &&
(mp_count_bits(&key->q) == 1536)) {
return sp_RsaPrivate_3072(in, inLen, &key->d, &key->p, &key->q,
&key->dP, &key->dQ, &key->u, &key->n,
out, outLen);
}
break;
#else
return sp_RsaPrivate_3072(in, inLen, &key->d, &key->p, &key->q,
NULL, NULL, NULL, &key->n, out, outLen);
return sp_RsaPrivate_3072(in, inLen, &key->d, NULL, NULL, NULL,
NULL, NULL, &key->n, out, outLen);
#endif
#endif
case RSA_PUBLIC_ENCRYPT:
@ -2088,12 +2096,16 @@ static int wc_RsaFunctionSync(const byte* in, word32 inLen, byte* out,
return MISSING_RNG_E;
#endif
#ifndef RSA_LOW_MEM
return sp_RsaPrivate_4096(in, inLen, &key->d, &key->p, &key->q,
&key->dP, &key->dQ, &key->u, &key->n,
out, outLen);
if ((mp_count_bits(&key->p) == 2048) &&
(mp_count_bits(&key->q) == 2048)) {
return sp_RsaPrivate_4096(in, inLen, &key->d, &key->p, &key->q,
&key->dP, &key->dQ, &key->u, &key->n,
out, outLen);
}
break;
#else
return sp_RsaPrivate_4096(in, inLen, &key->d, &key->p, &key->q,
NULL, NULL, NULL, &key->n, out, outLen);
return sp_RsaPrivate_4096(in, inLen, &key->d, NULL, NULL, NULL,
NULL, NULL, &key->n, out, outLen);
#endif
#endif
case RSA_PUBLIC_ENCRYPT: