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internal.c: RsaDec improvements

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This commit is contained in:
Marco Oliverio
2022-07-25 17:50:25 +02:00
parent 1727efbc2c
commit 856ea2ffc8
1 changed files with 13 additions and 6 deletions
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19
src/internal.c
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@ -4626,6 +4626,10 @@ int VerifyRsaSign(WOLFSSL* ssl, byte* verifySig, word32 sigSz,
int RsaDec(WOLFSSL* ssl, byte* in, word32 inSz, byte** out, word32* outSz,
RsaKey* key, DerBuffer* keyBufInfo)
{
word32 outSzTmp;
byte *outTmp;
byte mask;
int zero;
int ret;
#ifdef HAVE_PK_CALLBACKS
const byte* keyBuf = NULL;
@ -4642,6 +4646,7 @@ int RsaDec(WOLFSSL* ssl, byte* in, word32 inSz, byte** out, word32* outSz,
WOLFSSL_ENTER("RsaDec");
outTmp = *out;
#ifdef WOLFSSL_ASYNC_CRYPT
/* initialize event */
ret = wolfSSL_AsyncInit(ssl, &key->asyncDev, WC_ASYNC_FLAG_CALL_AGAIN);
@ -4652,7 +4657,7 @@ int RsaDec(WOLFSSL* ssl, byte* in, word32 inSz, byte** out, word32* outSz,
#ifdef HAVE_PK_CALLBACKS
if (ssl->ctx->RsaDecCb) {
void* ctx = wolfSSL_GetRsaDecCtx(ssl);
ret = ssl->ctx->RsaDecCb(ssl, in, inSz, out, keyBuf, keySz, ctx);
ret = ssl->ctx->RsaDecCb(ssl, in, inSz, &outTmp, keyBuf, keySz, ctx);
}
else
#endif /* HAVE_PK_CALLBACKS */
@ -4672,11 +4677,13 @@ int RsaDec(WOLFSSL* ssl, byte* in, word32 inSz, byte** out, word32* outSz,
}
#endif /* WOLFSSL_ASYNC_CRYPT */
/* For positive response return in outSz */
if (ret > 0) {
*outSz = ret;
ret = 0;
}
mask = ctMaskGT(ret, 0);
*outSz = 0;
zero = 0;
outSzTmp = (word32)ret;
ctMaskCopy(mask, (byte*)outSz, (byte*)&outSzTmp, (byte*)outSz, sizeof(*outSz));
ctMaskCopy(mask, (byte*)&ret, (byte*)&zero, (byte*)&ret, sizeof(ret));
ctMaskCopy(mask, (byte*)out, (byte*)&outTmp, (byte*)out, sizeof(*out));
WOLFSSL_LEAVE("RsaDec", ret);