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Add ability to switch to STD RSA method

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This commit is contained in:
Lealem Amedie
2025-07-02 10:03:28 -06:00
parent 844e961ff5
commit 064aace824
1 changed files with 19 additions and 4 deletions
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23
wolfcrypt/src/rsa.c
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@ -2271,7 +2271,10 @@ static int wc_RsaFunctionSync(const byte* in, word32 inLen, byte* out,
#endif
#ifndef RSA_LOW_MEM
if ((mp_count_bits(&key->p) == 1024) &&
(mp_count_bits(&key->q) == 1024)) {
(mp_count_bits(&key->q) == 1024) &&
(mp_count_bits(&key->dP) > 0) &&
(mp_count_bits(&key->dQ) > 0) &&
(mp_count_bits(&key->u) > 0)) {
return sp_RsaPrivate_2048(in, inLen, &key->d, &key->p, &key->q,
&key->dP, &key->dQ, &key->u, &key->n,
out, outLen);
@ -2302,7 +2305,10 @@ static int wc_RsaFunctionSync(const byte* in, word32 inLen, byte* out,
#endif
#ifndef RSA_LOW_MEM
if ((mp_count_bits(&key->p) == 1536) &&
(mp_count_bits(&key->q) == 1536)) {
(mp_count_bits(&key->q) == 1536) &&
(mp_count_bits(&key->dP) > 0) &&
(mp_count_bits(&key->dQ) > 0) &&
(mp_count_bits(&key->u) > 0)) {
return sp_RsaPrivate_3072(in, inLen, &key->d, &key->p, &key->q,
&key->dP, &key->dQ, &key->u, &key->n,
out, outLen);
@ -2333,7 +2339,10 @@ static int wc_RsaFunctionSync(const byte* in, word32 inLen, byte* out,
#endif
#ifndef RSA_LOW_MEM
if ((mp_count_bits(&key->p) == 2048) &&
(mp_count_bits(&key->q) == 2048)) {
(mp_count_bits(&key->q) == 2048) &&
(mp_count_bits(&key->dP) > 0) &&
(mp_count_bits(&key->dQ) > 0) &&
(mp_count_bits(&key->u) > 0)) {
return sp_RsaPrivate_4096(in, inLen, &key->d, &key->p, &key->q,
&key->dP, &key->dQ, &key->u, &key->n,
out, outLen);
@ -2434,7 +2443,13 @@ static int wc_RsaFunctionSync(const byte* in, word32 inLen, byte* out,
if (ret == 0 && mp_exptmod(tmp, &key->d, &key->n, tmp) != MP_OKAY)
ret = MP_EXPTMOD_E;
#else
if (ret == 0) {
if (ret == 0 && (mp_iszero(&key->p) || mp_iszero(&key->q) ||
mp_iszero(&key->dP) || mp_iszero(&key->dQ))) {
if (mp_exptmod(tmp, &key->d, &key->n, tmp) != MP_OKAY) {
ret = MP_EXPTMOD_E;
}
}
else if (ret == 0) {
#ifdef WOLFSSL_SMALL_STACK
mp_int* tmpa;
mp_int* tmpb = NULL;