Cache sha512 hash and parsed not_before and not_after with X509 cert.

Replace sha1 hash use with sha512 for certificate comparisons internal
to the library. use the cached sha512 for the validator's verification
cache.

Reduces our recomputation of hashes, and heavy use of time1 time
conversion functions noticed bu claudio@ in rpki client.

ok jsing@ tb@

1 files changed, 2 insertions, 2 deletions

diff --git a/src/lib/libcrypto/x509/x509_cmp.c b/src/lib/libcrypto/x509/x509_cmp.c
index 134a082730..bc944b71d7 100644
--- a/src/lib/libcrypto/x509/x509_cmp.c
+++ b/src/lib/libcrypto/x509/x509_cmp.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: x509_cmp.c,v 1.36 2021/11/01 20:53:08 tb Exp $ */
+/* $OpenBSD: x509_cmp.c,v 1.37 2021/11/04 23:52:34 beck Exp $ */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -215,7 +215,7 @@ X509_cmp(const X509 *a, const X509 *b)
         X509_check_purpose((X509 *)a, -1, 0);
         X509_check_purpose((X509 *)b, -1, 0);
 
-        return memcmp(a->sha1_hash, b->sha1_hash, SHA_DIGEST_LENGTH);
+        return memcmp(a->hash, b->hash, X509_CERT_HASH_LEN);
 }
 #endif