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EVP_DigestSign(): Check pctx != NULL 

Reviewed-by: Dmitry Belyavskiy <beldmit@gmail.com>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/26551)
This commit is contained in:
Bartel Artem 2025-01-24 10:21:03 +03:00 committed by Tomas Mraz
parent f1a4f0368b
commit 93d366bea6
1 changed files with 8 additions and 4 deletions
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12
crypto/evp/m_sigver.c
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@ -575,13 +575,17 @@ int EVP_DigestSign(EVP_MD_CTX *ctx, unsigned char *sigret, size_t *siglen,
{
EVP_PKEY_CTX *pctx = ctx->pctx;
if (pctx == NULL) {
ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
return 0;
}
if ((ctx->flags & EVP_MD_CTX_FLAG_FINALISED) != 0) {
ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR);
return 0;
}
if (pctx != NULL
&& pctx->operation == EVP_PKEY_OP_SIGNCTX
if (pctx->operation == EVP_PKEY_OP_SIGNCTX
&& pctx->op.sig.algctx != NULL
&& pctx->op.sig.signature != NULL) {
if (pctx->op.sig.signature->digest_sign != NULL) {
@ -594,8 +598,8 @@ int EVP_DigestSign(EVP_MD_CTX *ctx, unsigned char *sigret, size_t *siglen,
}
} else {
/* legacy */
if (ctx->pctx->pmeth != NULL && ctx->pctx->pmeth->digestsign != NULL)
return ctx->pctx->pmeth->digestsign(ctx, sigret, siglen, tbs, tbslen);
if (pctx->pmeth != NULL && pctx->pmeth->digestsign != NULL)
return pctx->pmeth->digestsign(ctx, sigret, siglen, tbs, tbslen);
}
if (sigret != NULL && EVP_DigestSignUpdate(ctx, tbs, tbslen) <= 0)