Deduplicate peer certificate chain processing code.

Rather than reimplement this in each TLS client and server, deduplicate it
into a single function. Furthermore, rather than dealing with the API
hazard that is SSL_get_peer_cert_chain() in this code, simply produce two
chains - one that has the leaf and one that does not.
SSL_get_peer_cert_chain() can then return the appropriate one.

This also moves the peer cert chain from the SSL_SESSION to the
SSL_HANDSHAKE, which makes more sense since it is not available on
resumption.

ok tb@

1 files changed, 3 insertions, 2 deletions

diff --git a/src/lib/libssl/Makefile b/src/lib/libssl/Makefile
index d0d7bc4e02..1788cd75a3 100644
--- a/src/lib/libssl/Makefile
+++ b/src/lib/libssl/Makefile
@@ -1,4 +1,4 @@
-# $OpenBSD: Makefile,v 1.76 2022/07/24 14:28:16 jsing Exp $
+# $OpenBSD: Makefile,v 1.77 2022/08/17 07:39:19 jsing Exp $
 
 .include <bsd.own.mk>
 .ifndef NOMAN
@@ -85,7 +85,8 @@ SRCS= \
         tls13_server.c \
         tls_buffer.c \
         tls_content.c \
-        tls_key_share.c
+        tls_key_share.c \
+        tls_lib.c
 
 HDRS=   dtls1.h srtp.h ssl.h ssl2.h ssl23.h ssl3.h tls1.h