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curl_sha512_256.c handle NULL digest

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Viktor Szakats 2026-07-01 00:15:13 +02:00
parent 37ec5ba194
commit e933b2b9b1
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1 changed files with 12 additions and 10 deletions
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22
lib/curl_sha512_256.c
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@ -164,19 +164,21 @@ static CURLcode Curl_sha512_256_finish(unsigned char *digest, void *context)
CURLcode result;
Curl_sha512_256_ctx * const ctx = (Curl_sha512_256_ctx *)context;
if(digest) {
#ifdef NEED_NETBSD_SHA512_256_WORKAROUND
/* Use a larger buffer to work around a bug in NetBSD:
https://gnats.netbsd.org/cgi-bin/query-pr-single.pl?number=58039 */
unsigned char tmp_digest[CURL_SHA512_256_DIGEST_SIZE * 2];
result = EVP_DigestFinal_ex(*ctx, tmp_digest, NULL) ?
CURLE_OK : CURLE_BAD_FUNCTION_ARGUMENT;
if(result == CURLE_OK)
memcpy(digest, tmp_digest, CURL_SHA512_256_DIGEST_SIZE);
curlx_memzero(tmp_digest, sizeof(tmp_digest));
/* Use a larger buffer to work around a bug in NetBSD:
https://gnats.netbsd.org/cgi-bin/query-pr-single.pl?number=58039 */
unsigned char tmp_digest[CURL_SHA512_256_DIGEST_SIZE * 2];
result = EVP_DigestFinal_ex(*ctx, tmp_digest, NULL) ?
CURLE_OK : CURLE_BAD_FUNCTION_ARGUMENT;
if(result == CURLE_OK)
memcpy(digest, tmp_digest, CURL_SHA512_256_DIGEST_SIZE);
curlx_memzero(tmp_digest, sizeof(tmp_digest));
#else /* !NEED_NETBSD_SHA512_256_WORKAROUND */
result = EVP_DigestFinal_ex(*ctx, digest, NULL) ?
CURLE_OK : CURLE_BAD_FUNCTION_ARGUMENT;
result = EVP_DigestFinal_ex(*ctx, digest, NULL) ?
CURLE_OK : CURLE_BAD_FUNCTION_ARGUMENT;
#endif /* NEED_NETBSD_SHA512_256_WORKAROUND */
}
EVP_MD_CTX_free(*ctx);
*ctx = NULL;