Prepare to provide SSL_CTX_set1_cert_store()

SSL_CTX_set_cert_store() should have been called SSL_CTX_set0_cert_store()
since it takes ownership of the store argument. Apparently a few people ran
into the issue of not bumping the refcount themselves, leading to use after
frees about 10 years ago. This is a quite rarely used API and there are no
misuses in the ports tree, but since someone did the work of writing a diff,
we can still add it.

Needless to say that SSL_CTX_get_cert_store() obviously has the exact same
issue and nobody seems to have thought of adding a get0 or get1 version to
match...

Fixes https://github.com/libressl/openbsd/issues/71
From Kenjiro Nakayama

3 files changed, 17 insertions, 3 deletions

diff --git a/lib/libssl/hidden/openssl/ssl.h b/lib/libssl/hidden/openssl/ssl.h
index cff250ee755..6cf8d0c7972 100644
--- a/lib/libssl/hidden/openssl/ssl.h
+++ b/lib/libssl/hidden/openssl/ssl.h
@@ -1,4 +1,4 @@
-/* $OpenBSD: ssl.h,v 1.7 2024/07/14 15:39:36 tb Exp $ */
+/* $OpenBSD: ssl.h,v 1.8 2024/08/03 04:50:27 tb Exp $ */
 /*
  * Copyright (c) 2023 Bob Beck <beck@openbsd.org>
  *
@@ -105,6 +105,7 @@ LSSL_USED(SSL_CTX_set_timeout);
 LSSL_USED(SSL_CTX_get_timeout);
 LSSL_USED(SSL_CTX_get_cert_store);
 LSSL_USED(SSL_CTX_set_cert_store);
+LSSL_USED(SSL_CTX_set1_cert_store);
 LSSL_USED(SSL_CTX_get0_certificate);
 LSSL_USED(SSL_CTX_get0_privatekey);
 LSSL_USED(SSL_want);
diff --git a/lib/libssl/ssl.h b/lib/libssl/ssl.h
index d8846a48516..7f9db94066e 100644
--- a/lib/libssl/ssl.h
+++ b/lib/libssl/ssl.h
@@ -1,4 +1,4 @@
-/* $OpenBSD: ssl.h,v 1.239 2024/07/14 15:39:36 tb Exp $ */
+/* $OpenBSD: ssl.h,v 1.240 2024/08/03 04:50:27 tb Exp $ */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -1107,6 +1107,9 @@ long SSL_CTX_set_timeout(SSL_CTX *ctx, long t);
 long SSL_CTX_get_timeout(const SSL_CTX *ctx);
 X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *);
 void SSL_CTX_set_cert_store(SSL_CTX *, X509_STORE *);
+#if defined(LIBRESSL_INTERNAL) || defined(LIBRESSL_NEXT_API)
+void SSL_CTX_set1_cert_store(SSL_CTX *ctx, X509_STORE *store);
+#endif
 X509 *SSL_CTX_get0_certificate(const SSL_CTX *ctx);
 EVP_PKEY *SSL_CTX_get0_privatekey(const SSL_CTX *ctx);
 int SSL_want(const SSL *s);
diff --git a/lib/libssl/ssl_lib.c b/lib/libssl/ssl_lib.c
index 4cf5c46fda6..1a2bf369520 100644
--- a/lib/libssl/ssl_lib.c
+++ b/lib/libssl/ssl_lib.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: ssl_lib.c,v 1.328 2024/07/20 04:04:23 jsing Exp $ */
+/* $OpenBSD: ssl_lib.c,v 1.329 2024/08/03 04:50:27 tb Exp $ */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -3403,6 +3403,16 @@ SSL_CTX_set_cert_store(SSL_CTX *ctx, X509_STORE *store)
 }
 LSSL_ALIAS(SSL_CTX_set_cert_store);
 
+void
+SSL_CTX_set1_cert_store(SSL_CTX *ctx, X509_STORE *store)
+{
+	if (store != NULL)
+		X509_STORE_up_ref(store);
+
+	SSL_CTX_set_cert_store(ctx, store);
+}
+LSSL_ALIAS(SSL_CTX_set1_cert_store);
+
 X509 *
 SSL_CTX_get0_certificate(const SSL_CTX *ctx)
 {