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eng_devcrypto: expand digest failure cases

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Return failure when the digest_ctx is null in digest_update and
digest_final, and when md is null in digest_final.

Signed-off-by: Eneas U de Queiroz <cote2004-github@yahoo.com>

Reviewed-by: Matthias St. Pierre <Matthias.St.Pierre@ncp-e.com>
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/7585)
This commit is contained in:
Eneas U de Queiroz 2018-11-14 11:22:14 -02:00 committed by Richard Levitte
parent d9d4dff5c6
commit 4d9f996544
1 changed files with 5 additions and 0 deletions
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crypto/engine/eng_devcrypto.c
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@ -438,6 +438,9 @@ static int digest_update(EVP_MD_CTX *ctx, const void *data, size_t count)
if (count == 0)
return 1;
if (digest_ctx == NULL)
return 0;
if (digest_op(digest_ctx, data, count, NULL, COP_FLAG_UPDATE) < 0) {
SYSerr(SYS_F_IOCTL, errno);
return 0;
@ -451,6 +454,8 @@ static int digest_final(EVP_MD_CTX *ctx, unsigned char *md)
struct digest_ctx *digest_ctx =
(struct digest_ctx *)EVP_MD_CTX_md_data(ctx);
if (md == NULL || digest_ctx == NULL)
return 0;
if (digest_op(digest_ctx, NULL, 0, md, COP_FLAG_FINAL) < 0) {
SYSerr(SYS_F_IOCTL, errno);
return 0;