libcrypto: add header guards to *_local.h

An upcoming change requires the inclusion of asn1_local.h in x509_local.h
which doesn't work due to missing header guards. Add guards to all local
headers that don't have them, although reacharounds and multiple inclusions
are unlikely to occur for most of those.

ok jsing

1 files changed, 6 insertions, 1 deletions

diff --git a/src/lib/libcrypto/rsa/rsa_local.h b/src/lib/libcrypto/rsa/rsa_local.h
index 3f88b952a2..a026a488b6 100644
--- a/src/lib/libcrypto/rsa/rsa_local.h
+++ b/src/lib/libcrypto/rsa/rsa_local.h
@@ -1,4 +1,4 @@
-/* $OpenBSD: rsa_local.h,v 1.10 2025/01/05 15:39:12 tb Exp $ */
+/* $OpenBSD: rsa_local.h,v 1.11 2025/11/26 10:19:57 tb Exp $ */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -56,6 +56,9 @@
  * [including the GNU Public Licence.]
  */
 
+#ifndef HEADER_RSA_LOCAL_H
+#define HEADER_RSA_LOCAL_H
+
 __BEGIN_HIDDEN_DECLS
 
 #define RSA_MIN_MODULUS_BITS    512
@@ -152,3 +155,5 @@ int BN_BLINDING_is_local(BN_BLINDING *b);
 BN_BLINDING *RSA_setup_blinding(RSA *rsa, BN_CTX *ctx);
 
 __END_HIDDEN_DECLS
+
+#endif /* HEADER_RSA_LOCAL_H */