remove dead code and unused dependencies

ok tb@

usr.sbin/smtpd/smtp/Makefile

@@ -1,4 +1,4 @@
-#	$OpenBSD: Makefile,v 1.4 2021/03/05 12:37:32 eric Exp $
+#	$OpenBSD: Makefile,v 1.5 2021/04/10 10:19:19 eric Exp $
 
 .PATH:	${.CURDIR}/..
 
@@ -12,12 +12,10 @@ SRCS+=	ioev.c
 SRCS+=	log.c
 SRCS+=	smtp_client.c
 SRCS+=	smtpc.c
-SRCS+=	ssl.c
-SRCS+=	ssl_verify.c
 
 CPPFLAGS+= -DIO_TLS
 
-LDADD+=	-levent -lutil -ltls -lssl -lcrypto -lm -lz
-DPADD+=	${LIBEVENT} ${LIBUTIL} ${LIBTLS} ${LIBSSL} ${LIBCRYPTO} ${LIBM} ${LIBZ}
+LDADD+=	-levent -lutil -ltls -lssl -lcrypto
+DPADD+=	${LIBEVENT} ${LIBUTIL} ${LIBTLS} ${LIBSSL} ${LIBCRYPTO}
 
 .include <bsd.prog.mk>

usr.sbin/smtpd/smtpc.c

@@ -1,4 +1,4 @@
-/*	$OpenBSD: smtpc.c,v 1.14 2021/03/05 12:37:32 eric Exp $	*/
+/*	$OpenBSD: smtpc.c,v 1.15 2021/04/10 10:19:19 eric Exp $	*/
 
 /*
  * Copyright (c) 2018 Eric Faurot <[email protected]>
@@ -32,10 +32,7 @@
 #include <tls.h>
 #include <unistd.h>
 
-#include <openssl/ssl.h>
-
 #include "smtp.h"
-#include "ssl.h"
 #include "log.h"
 
 static void parse_server(char *);
@@ -370,37 +367,6 @@ log_trace(int lvl, const char *emsg, ...)
 	}
 }
 
-void
-smtp_verify_server_cert(void *tag, struct smtp_client *proto, void *ctx)
-{
-	SSL *ssl = ctx;
-	X509 *cert;
-	long res;
-	int match;
-
-	if ((cert = SSL_get_peer_certificate(ssl))) {
-		(void)ssl_check_name(cert, servname, &match);
-		X509_free(cert);
-		res = SSL_get_verify_result(ssl);
-		if (res == X509_V_OK) {
-			if (match) {
-				log_debug("valid certificate");
-				smtp_cert_verified(proto, CERT_OK);
-			}
-			else {
-				log_debug("certificate does not match hostname");
-				smtp_cert_verified(proto, CERT_INVALID);
-			}
-			return;
-		}
-		log_debug("certificate validation error %ld", res);
-	}
-	else
-		log_debug("no certificate provided");
-
-	smtp_cert_verified(proto, CERT_INVALID);
-}
-
 void
 smtp_require_tls(void *tag, struct smtp_client *proto)
 {