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curl_sha512_256: work around a NetBSD bug

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Based on Michael Kaufmann analysis and suggestion

Closes #13133
This commit is contained in:
Evgeny Grin 2024-03-15 13:11:53 +01:00 committed by Daniel Stenberg
parent 80a3b830cc
commit b6006381fb
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1 changed files with 10 additions and 0 deletions
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10
lib/curl_sha512_256.c
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@ -153,7 +153,17 @@ Curl_sha512_256_finish(unsigned char *digest,
CURLcode ret;
Curl_sha512_256_ctx *const ctx = (Curl_sha512_256_ctx *)context;
#ifdef __NetBSD__
/* 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[SHA512_256_DIGEST_SIZE * 2];
ret = EVP_DigestFinal_ex(*ctx,
tmp_digest, NULL) ? CURLE_OK : CURLE_SSL_CIPHER;
if(ret == CURLE_OK)
memcpy(digest, tmp_digest, SHA512_256_DIGEST_SIZE);
#else /* ! __NetBSD__ */
ret = EVP_DigestFinal_ex(*ctx, digest, NULL) ? CURLE_OK : CURLE_SSL_CIPHER;
#endif /* ! __NetBSD__ */
EVP_MD_CTX_destroy(*ctx);
*ctx = NULL;