xref: /openbsd-current/usr.bin/openssl/s_client.c

/* $OpenBSD: s_client.c,v 1.26 2015/12/01 01:24:47 beck Exp $ */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young (eay@cryptsoft.com).
 * The implementation was written so as to conform with Netscapes SSL.
 *
 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.  The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
 *
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    "This product includes cryptographic software written by
 *     Eric Young (eay@cryptsoft.com)"
 *    The word 'cryptographic' can be left out if the rouines from the library
 *    being used are not cryptographic related :-).
 * 4. If you include any Windows specific code (or a derivative thereof) from
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
 *
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.]
 */
/* ====================================================================
 * Copyright (c) 1998-2006 The OpenSSL Project.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    openssl-core@openssl.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
 *
 * This product includes cryptographic software written by Eric Young
 * (eay@cryptsoft.com).  This product includes software written by Tim
 * Hudson (tjh@cryptsoft.com).
 *
 */
/* ====================================================================
 * Copyright 2005 Nokia. All rights reserved.
 *
 * The portions of the attached software ("Contribution") is developed by
 * Nokia Corporation and is licensed pursuant to the OpenSSL open source
 * license.
 *
 * The Contribution, originally written by Mika Kousa and Pasi Eronen of
 * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
 * support (see RFC 4279) to OpenSSL.
 *
 * No patent licenses or other rights except those expressly stated in
 * the OpenSSL open source license shall be deemed granted or received
 * expressly, by implication, estoppel, or otherwise.
 *
 * No assurances are provided by Nokia that the Contribution does not
 * infringe the patent or other intellectual property rights of any third
 * party or that the license provides you with all the necessary rights
 * to make use of the Contribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
 * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
 * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
 * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
 * OTHERWISE.
 */

#include <sys/types.h>
#include <sys/socket.h>

#include <netinet/in.h>

#include <assert.h>
#include <ctype.h>
#include <limits.h>
#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <poll.h>

#include "apps.h"

#include <openssl/bn.h>
#include <openssl/err.h>
#include <openssl/ocsp.h>
#include <openssl/pem.h>
#include <openssl/ssl.h>
#include <openssl/x509.h>

#include "s_apps.h"
#include "timeouts.h"

/*#define SSL_HOST_NAME	"www.netscape.com" */
/*#define SSL_HOST_NAME	"193.118.187.102" */
#define SSL_HOST_NAME	"localhost"

 /*#define TEST_CERT "client.pem" *//* no default cert. */

#define BUFSIZZ 1024*8

static int c_nbio = 0;
static int c_Pause = 0;
static int c_debug = 0;
static int c_tlsextdebug = 0;
static int c_status_req = 0;
static int c_msg = 0;
static int c_showcerts = 0;

static char *keymatexportlabel = NULL;
static int keymatexportlen = 20;

static void sc_usage(void);
static void print_stuff(BIO * berr, SSL * con, int full);
static int ocsp_resp_cb(SSL * s, void *arg);
static BIO *bio_c_out = NULL;
static int c_quiet = 0;
static int c_ign_eof = 0;


static void
sc_usage(void)
{
	BIO_printf(bio_err, "usage: s_client args\n");
	BIO_printf(bio_err, "\n");
	BIO_printf(bio_err, " -4            - Force IPv4\n");
	BIO_printf(bio_err, " -6            - Force IPv6\n");
	BIO_printf(bio_err, " -host host     - use -connect instead\n");
	BIO_printf(bio_err, " -port port     - use -connect instead\n");
	BIO_printf(bio_err, " -connect host:port - who to connect to (default is %s:%s)\n", SSL_HOST_NAME, PORT_STR);
	BIO_printf(bio_err, " -proxy host:port - connect to http proxy\n");

	BIO_printf(bio_err, " -verify arg   - turn on peer certificate verification\n");
	BIO_printf(bio_err, " -cert arg     - certificate file to use, PEM format assumed\n");
	BIO_printf(bio_err, " -certform arg - certificate format (PEM or DER) PEM default\n");
	BIO_printf(bio_err, " -key arg      - Private key file to use, in cert file if\n");
	BIO_printf(bio_err, "                 not specified but cert file is.\n");
	BIO_printf(bio_err, " -keyform arg  - key format (PEM or DER) PEM default\n");
	BIO_printf(bio_err, " -pass arg     - private key file pass phrase source\n");
	BIO_printf(bio_err, " -CApath arg   - PEM format directory of CA's\n");
	BIO_printf(bio_err, " -CAfile arg   - PEM format file of CA's\n");
	BIO_printf(bio_err, " -reconnect    - Drop and re-make the connection with the same Session-ID\n");
	BIO_printf(bio_err, " -pause        - sleep(1) after each read(2) and write(2) system call\n");
	BIO_printf(bio_err, " -showcerts    - show all certificates in the chain\n");
	BIO_printf(bio_err, " -debug        - extra output\n");
	BIO_printf(bio_err, " -msg          - Show protocol messages\n");
	BIO_printf(bio_err, " -nbio_test    - more ssl protocol testing\n");
	BIO_printf(bio_err, " -state        - print the 'ssl' states\n");
	BIO_printf(bio_err, " -nbio         - Run with non-blocking IO\n");
	BIO_printf(bio_err, " -crlf         - convert LF from terminal into CRLF\n");
	BIO_printf(bio_err, " -quiet        - no s_client output\n");
	BIO_printf(bio_err, " -ign_eof      - ignore input eof (default when -quiet)\n");
	BIO_printf(bio_err, " -no_ign_eof   - don't ignore input eof\n");
	BIO_printf(bio_err, " -tls1_2       - just use TLSv1.2\n");
	BIO_printf(bio_err, " -tls1_1       - just use TLSv1.1\n");
	BIO_printf(bio_err, " -tls1         - just use TLSv1\n");
	BIO_printf(bio_err, " -dtls1        - just use DTLSv1\n");
	BIO_printf(bio_err, " -mtu          - set the link layer MTU\n");
	BIO_printf(bio_err, " -no_tls1_2/-no_tls1_1/-no_tls1/-no_ssl3/-no_ssl2 - turn off that protocol\n");
	BIO_printf(bio_err, " -bugs         - Switch on all SSL implementation bug workarounds\n");
	BIO_printf(bio_err, " -cipher       - preferred cipher to use, use the 'openssl ciphers'\n");
	BIO_printf(bio_err, "                 command to see what is available\n");
	BIO_printf(bio_err, " -starttls prot - use the STARTTLS command before starting TLS\n");
	BIO_printf(bio_err, "                 for those protocols that support it, where\n");
	BIO_printf(bio_err, "                 'prot' defines which one to assume.  Currently,\n");
	BIO_printf(bio_err, "                 only \"smtp\", \"lmtp\", \"pop3\", \"imap\", \"ftp\" and \"xmpp\"\n");
	BIO_printf(bio_err, "                 are supported.\n");
	BIO_printf(bio_err, " -xmpphost host - connect to this virtual host on the xmpp server\n");
	BIO_printf(bio_err, " -sess_out arg - file to write SSL session to\n");
	BIO_printf(bio_err, " -sess_in arg  - file to read SSL session from\n");
	BIO_printf(bio_err, " -servername host  - Set TLS extension servername in ClientHello\n");
	BIO_printf(bio_err, " -tlsextdebug      - hex dump of all TLS extensions received\n");
	BIO_printf(bio_err, " -status           - request certificate status from server\n");
	BIO_printf(bio_err, " -no_ticket        - disable use of RFC4507bis session tickets\n");
	BIO_printf(bio_err, " -nextprotoneg arg - enable NPN extension, considering named protocols supported (comma-separated list)\n");
	BIO_printf(bio_err, " -alpn arg         - enable ALPN extension, considering named protocols supported (comma-separated list)\n");
#ifndef OPENSSL_NO_SRTP
	BIO_printf(bio_err, " -use_srtp profiles - Offer SRTP key management with a colon-separated profile list\n");
#endif
	BIO_printf(bio_err, " -keymatexport label   - Export keying material using label\n");
	BIO_printf(bio_err, " -keymatexportlen len  - Export len bytes of keying material (default 20)\n");
}


/* This is a context that we pass to callbacks */
typedef struct tlsextctx_st {
	BIO *biodebug;
	int ack;
} tlsextctx;


static int
ssl_servername_cb(SSL * s, int *ad, void *arg)
{
	tlsextctx *p = (tlsextctx *) arg;
	const char *hn = SSL_get_servername(s, TLSEXT_NAMETYPE_host_name);
	if (SSL_get_servername_type(s) != -1)
		p->ack = !SSL_session_reused(s) && hn != NULL;
	else
		BIO_printf(bio_err, "Can't use SSL_get_servername\n");

	return SSL_TLSEXT_ERR_OK;
}

#ifndef OPENSSL_NO_SRTP
char *srtp_profiles = NULL;
#endif

/* This the context that we pass to next_proto_cb */
typedef struct tlsextnextprotoctx_st {
	unsigned char *data;
	unsigned short len;
	int status;
} tlsextnextprotoctx;

static tlsextnextprotoctx next_proto;

static int
next_proto_cb(SSL * s, unsigned char **out, unsigned char *outlen, const unsigned char *in, unsigned int inlen, void *arg)
{
	tlsextnextprotoctx *ctx = arg;

	if (!c_quiet) {
		/* We can assume that |in| is syntactically valid. */
		unsigned i;
		BIO_printf(bio_c_out, "Protocols advertised by server: ");
		for (i = 0; i < inlen;) {
			if (i)
				BIO_write(bio_c_out, ", ", 2);
			BIO_write(bio_c_out, &in[i + 1], in[i]);
			i += in[i] + 1;
		}
		BIO_write(bio_c_out, "\n", 1);
	}
	ctx->status = SSL_select_next_proto(out, outlen, in, inlen, ctx->data, ctx->len);
	return SSL_TLSEXT_ERR_OK;
}

enum {
	PROTO_OFF = 0,
	PROTO_SMTP,
	PROTO_LMTP,
	PROTO_POP3,
	PROTO_IMAP,
	PROTO_FTP,
	PROTO_XMPP
};

int
s_client_main(int argc, char **argv)
{
	unsigned int off = 0, clr = 0;
	SSL *con = NULL;
	int s, k, state = 0, af = AF_UNSPEC;
	char *cbuf = NULL, *sbuf = NULL, *mbuf = NULL;
	int cbuf_len, cbuf_off;
	int sbuf_len, sbuf_off;
	char *port = PORT_STR;
	int full_log = 1;
	char *host = SSL_HOST_NAME;
	char *xmpphost = NULL;
	char *proxy = NULL, *connect = NULL;
	char *cert_file = NULL, *key_file = NULL;
	int cert_format = FORMAT_PEM, key_format = FORMAT_PEM;
	char *passarg = NULL, *pass = NULL;
	X509 *cert = NULL;
	EVP_PKEY *key = NULL;
	char *CApath = NULL, *CAfile = NULL, *cipher = NULL;
	int reconnect = 0, badop = 0, verify = SSL_VERIFY_NONE, bugs = 0;
	int crlf = 0;
	int write_tty, read_tty, write_ssl, read_ssl, tty_on, ssl_pending;
	SSL_CTX *ctx = NULL;
	int ret = 1, in_init = 1, i, nbio_test = 0;
	int starttls_proto = PROTO_OFF;
	int prexit = 0;
	X509_VERIFY_PARAM *vpm = NULL;
	int badarg = 0;
	const SSL_METHOD *meth = NULL;
	int socket_type = SOCK_STREAM;
	BIO *sbio;
	int mbuf_len = 0;
	struct timeval timeout;
	const char *errstr = NULL;
	char *servername = NULL;
	tlsextctx tlsextcbp =
	{NULL, 0};
	const char *next_proto_neg_in = NULL;
	const char *alpn_in = NULL;
	char *sess_in = NULL;
	char *sess_out = NULL;
	struct sockaddr peer;
	int peerlen = sizeof(peer);
	int enable_timeouts = 0;
	long socket_mtu = 0;

	if (single_execution) {
		if (pledge("stdio inet dns rpath wpath cpath tty dns", NULL) == -1) {
			perror("pledge");
			exit(1);
		}
	}

	meth = SSLv23_client_method();

	c_Pause = 0;
	c_quiet = 0;
	c_ign_eof = 0;
	c_debug = 0;
	c_msg = 0;
	c_showcerts = 0;

	if (((cbuf = malloc(BUFSIZZ)) == NULL) ||
	    ((sbuf = malloc(BUFSIZZ)) == NULL) ||
	    ((mbuf = malloc(BUFSIZZ + 1)) == NULL)) {	/* NUL byte */
		BIO_printf(bio_err, "out of memory\n");
		goto end;
	}
	verify_depth = 0;
	c_nbio = 0;

	argc--;
	argv++;
	while (argc >= 1) {
		if (strcmp(*argv, "-host") == 0) {
			if (--argc < 1)
				goto bad;
			host = *(++argv);
		} else if (strcmp(*argv, "-port") == 0) {
			if (--argc < 1)
				goto bad;
			port = *(++argv);
			if (port == NULL || *port == '\0')
				goto bad;
		} else if (strcmp(*argv, "-connect") == 0) {
			if (--argc < 1)
				goto bad;
			connect = *(++argv);
		} else if (strcmp(*argv, "-proxy") == 0) {
			if (--argc < 1)
				goto bad;
			proxy = *(++argv);
		} else if (strcmp(*argv,"-xmpphost") == 0) {
			if (--argc < 1)
				goto bad;
			xmpphost= *(++argv);
		} else if (strcmp(*argv, "-verify") == 0) {
			verify = SSL_VERIFY_PEER;
			if (--argc < 1)
				goto bad;
			verify_depth = strtonum(*(++argv), 0, INT_MAX, &errstr);
			if (errstr)
				goto bad;
			BIO_printf(bio_err, "verify depth is %d\n", verify_depth);
		} else if (strcmp(*argv, "-cert") == 0) {
			if (--argc < 1)
				goto bad;
			cert_file = *(++argv);
		} else if (strcmp(*argv, "-sess_out") == 0) {
			if (--argc < 1)
				goto bad;
			sess_out = *(++argv);
		} else if (strcmp(*argv, "-sess_in") == 0) {
			if (--argc < 1)
				goto bad;
			sess_in = *(++argv);
		} else if (strcmp(*argv, "-certform") == 0) {
			if (--argc < 1)
				goto bad;
			cert_format = str2fmt(*(++argv));
		} else if (args_verify(&argv, &argc, &badarg, bio_err, &vpm)) {
			if (badarg)
				goto bad;
			continue;
		} else if (strcmp(*argv, "-verify_return_error") == 0)
			verify_return_error = 1;
		else if (strcmp(*argv, "-prexit") == 0)
			prexit = 1;
		else if (strcmp(*argv, "-crlf") == 0)
			crlf = 1;
		else if (strcmp(*argv, "-quiet") == 0) {
			c_quiet = 1;
			c_ign_eof = 1;
		} else if (strcmp(*argv, "-ign_eof") == 0)
			c_ign_eof = 1;
		else if (strcmp(*argv, "-no_ign_eof") == 0)
			c_ign_eof = 0;
		else if (strcmp(*argv, "-pause") == 0)
			c_Pause = 1;
		else if (strcmp(*argv, "-debug") == 0)
			c_debug = 1;
		else if (strcmp(*argv, "-tlsextdebug") == 0)
			c_tlsextdebug = 1;
		else if (strcmp(*argv, "-status") == 0)
			c_status_req = 1;
		else if (strcmp(*argv, "-msg") == 0)
			c_msg = 1;
		else if (strcmp(*argv, "-showcerts") == 0)
			c_showcerts = 1;
		else if (strcmp(*argv, "-nbio_test") == 0)
			nbio_test = 1;
		else if (strcmp(*argv, "-state") == 0)
			state = 1;
		else if (strcmp(*argv, "-tls1_2") == 0)
			meth = TLSv1_2_client_method();
		else if (strcmp(*argv, "-tls1_1") == 0)
			meth = TLSv1_1_client_method();
		else if (strcmp(*argv, "-tls1") == 0)
			meth = TLSv1_client_method();
#ifndef OPENSSL_NO_DTLS1
		else if (strcmp(*argv, "-dtls1") == 0) {
			meth = DTLSv1_client_method();
			socket_type = SOCK_DGRAM;
		} else if (strcmp(*argv, "-timeout") == 0)
			enable_timeouts = 1;
		else if (strcmp(*argv, "-mtu") == 0) {
			if (--argc < 1)
				goto bad;
			socket_mtu = strtonum(*(++argv), 0, LONG_MAX, &errstr);
			if (errstr)
				goto bad;
		}
#endif
		else if (strcmp(*argv, "-bugs") == 0)
			bugs = 1;
		else if (strcmp(*argv, "-keyform") == 0) {
			if (--argc < 1)
				goto bad;
			key_format = str2fmt(*(++argv));
		} else if (strcmp(*argv, "-pass") == 0) {
			if (--argc < 1)
				goto bad;
			passarg = *(++argv);
		} else if (strcmp(*argv, "-key") == 0) {
			if (--argc < 1)
				goto bad;
			key_file = *(++argv);
		} else if (strcmp(*argv, "-reconnect") == 0) {
			reconnect = 5;
		} else if (strcmp(*argv, "-CApath") == 0) {
			if (--argc < 1)
				goto bad;
			CApath = *(++argv);
		} else if (strcmp(*argv, "-CAfile") == 0) {
			if (--argc < 1)
				goto bad;
			CAfile = *(++argv);
		} else if (strcmp(*argv, "-no_tls1_2") == 0)
			off |= SSL_OP_NO_TLSv1_2;
		else if (strcmp(*argv, "-no_tls1_1") == 0)
			off |= SSL_OP_NO_TLSv1_1;
		else if (strcmp(*argv, "-no_tls1") == 0)
			off |= SSL_OP_NO_TLSv1;
		else if (strcmp(*argv, "-no_ssl3") == 0)
			off |= SSL_OP_NO_SSLv3;
		else if (strcmp(*argv, "-no_ssl2") == 0)
			off |= SSL_OP_NO_SSLv2;
		else if (strcmp(*argv, "-no_comp") == 0) {
			off |= SSL_OP_NO_COMPRESSION;
		}
		else if (strcmp(*argv, "-no_ticket") == 0) {
			off |= SSL_OP_NO_TICKET;
		}
		else if (strcmp(*argv, "-nextprotoneg") == 0) {
			if (--argc < 1)
				goto bad;
			next_proto_neg_in = *(++argv);
		}
		else if (strcmp(*argv, "-alpn") == 0) {
			if (--argc < 1)
				goto bad;
			alpn_in = *(++argv);
		} else if (strcmp(*argv, "-serverpref") == 0)
			off |= SSL_OP_CIPHER_SERVER_PREFERENCE;
		else if (strcmp(*argv, "-legacy_renegotiation") == 0)
			; /* no-op */
		else if (strcmp(*argv, "-legacy_server_connect") == 0) {
			off |= SSL_OP_LEGACY_SERVER_CONNECT;
		} else if (strcmp(*argv, "-no_legacy_server_connect") == 0) {
			clr |= SSL_OP_LEGACY_SERVER_CONNECT;
		} else if (strcmp(*argv, "-cipher") == 0) {
			if (--argc < 1)
				goto bad;
			cipher = *(++argv);
		}
		else if (strcmp(*argv, "-nbio") == 0) {
			c_nbio = 1;
		}
		else if (strcmp(*argv, "-starttls") == 0) {
			if (--argc < 1)
				goto bad;
			++argv;
			if (strcmp(*argv, "smtp") == 0)
				starttls_proto = PROTO_SMTP;
			else if (strcmp(*argv, "lmtp") == 0)
				starttls_proto = PROTO_LMTP;
			else if (strcmp(*argv, "pop3") == 0)
				starttls_proto = PROTO_POP3;
			else if (strcmp(*argv, "imap") == 0)
				starttls_proto = PROTO_IMAP;
			else if (strcmp(*argv, "ftp") == 0)
				starttls_proto = PROTO_FTP;
			else if (strcmp(*argv, "xmpp") == 0)
				starttls_proto = PROTO_XMPP;
			else
				goto bad;
		}
		else if (strcmp(*argv, "-4") == 0) {
			af = AF_INET;
		} else if (strcmp(*argv, "-6") == 0) {
			af = AF_INET6;
		}
		else if (strcmp(*argv, "-servername") == 0) {
			if (--argc < 1)
				goto bad;
			servername = *(++argv);
			/* meth=TLSv1_client_method(); */
		}
#ifndef OPENSSL_NO_SRTP
		else if (strcmp(*argv, "-use_srtp") == 0) {
			if (--argc < 1)
				goto bad;
			srtp_profiles = *(++argv);
		}
#endif
		else if (strcmp(*argv, "-keymatexport") == 0) {
			if (--argc < 1)
				goto bad;
			keymatexportlabel = *(++argv);
		} else if (strcmp(*argv, "-keymatexportlen") == 0) {
			if (--argc < 1)
				goto bad;
			keymatexportlen = strtonum(*(++argv), 1, INT_MAX, &errstr);
			if (errstr)
				goto bad;
		} else {
			BIO_printf(bio_err, "unknown option %s\n", *argv);
			badop = 1;
			break;
		}
		argc--;
		argv++;
	}
	if (proxy != NULL) {
		if (!extract_host_port(proxy, &host, NULL, &port))
			goto bad;
		if (connect == NULL)
			connect = SSL_HOST_NAME;
	} else if (connect != NULL) {
		if (!extract_host_port(connect, &host, NULL, &port))
			goto bad;
	}
	if (badop) {
bad:
		if (errstr)
			BIO_printf(bio_err, "invalid argument %s: %s\n",
			    *argv, errstr);
		else
			sc_usage();
		goto end;
	}

	next_proto.status = -1;
	if (next_proto_neg_in) {
		next_proto.data = next_protos_parse(&next_proto.len, next_proto_neg_in);
		if (next_proto.data == NULL) {
			BIO_printf(bio_err, "Error parsing -nextprotoneg argument\n");
			goto end;
		}
	} else
		next_proto.data = NULL;

	if (!app_passwd(bio_err, passarg, NULL, &pass, NULL)) {
		BIO_printf(bio_err, "Error getting password\n");
		goto end;
	}
	if (key_file == NULL)
		key_file = cert_file;


	if (key_file) {

		key = load_key(bio_err, key_file, key_format, 0, pass,
		    "client certificate private key file");
		if (!key) {
			ERR_print_errors(bio_err);
			goto end;
		}
	}
	if (cert_file) {
		cert = load_cert(bio_err, cert_file, cert_format,
		    NULL, "client certificate file");

		if (!cert) {
			ERR_print_errors(bio_err);
			goto end;
		}
	}
	if (bio_c_out == NULL) {
		if (c_quiet && !c_debug && !c_msg) {
			bio_c_out = BIO_new(BIO_s_null());
		} else {
			if (bio_c_out == NULL)
				bio_c_out = BIO_new_fp(stdout, BIO_NOCLOSE);
		}
	}

	ctx = SSL_CTX_new(meth);
	if (ctx == NULL) {
		ERR_print_errors(bio_err);
		goto end;
	}
	if (vpm)
		SSL_CTX_set1_param(ctx, vpm);

#ifndef OPENSSL_NO_SRTP
	if (srtp_profiles != NULL)
		SSL_CTX_set_tlsext_use_srtp(ctx, srtp_profiles);
#endif
	if (bugs)
		SSL_CTX_set_options(ctx, SSL_OP_ALL | off);
	else
		SSL_CTX_set_options(ctx, off);

	if (clr)
		SSL_CTX_clear_options(ctx, clr);
	/*
	 * DTLS: partial reads end up discarding unread UDP bytes :-( Setting
	 * read ahead solves this problem.
	 */
	if (socket_type == SOCK_DGRAM)
		SSL_CTX_set_read_ahead(ctx, 1);

	if (next_proto.data)
		SSL_CTX_set_next_proto_select_cb(ctx, next_proto_cb, &next_proto);
	if (alpn_in) {
		unsigned short alpn_len;
		unsigned char *alpn = next_protos_parse(&alpn_len, alpn_in);

		if (alpn == NULL) {
			BIO_printf(bio_err, "Error parsing -alpn argument\n");
			goto end;
		}
		SSL_CTX_set_alpn_protos(ctx, alpn, alpn_len);
		free(alpn);
	}

	if (state)
		SSL_CTX_set_info_callback(ctx, apps_ssl_info_callback);
	if (cipher != NULL)
		if (!SSL_CTX_set_cipher_list(ctx, cipher)) {
			BIO_printf(bio_err, "error setting cipher list\n");
			ERR_print_errors(bio_err);
			goto end;
		}

	SSL_CTX_set_verify(ctx, verify, verify_callback);
	if (!set_cert_key_stuff(ctx, cert, key))
		goto end;

	if ((!SSL_CTX_load_verify_locations(ctx, CAfile, CApath)) ||
	    (!SSL_CTX_set_default_verify_paths(ctx))) {
		/*
		 * BIO_printf(bio_err,"error setting default verify
		 * locations\n");
		 */
		ERR_print_errors(bio_err);
		/* goto end; */
	}
	if (servername != NULL) {
		tlsextcbp.biodebug = bio_err;
		SSL_CTX_set_tlsext_servername_callback(ctx, ssl_servername_cb);
		SSL_CTX_set_tlsext_servername_arg(ctx, &tlsextcbp);
	}

	con = SSL_new(ctx);
	if (sess_in) {
		SSL_SESSION *sess;
		BIO *stmp = BIO_new_file(sess_in, "r");
		if (!stmp) {
			BIO_printf(bio_err, "Can't open session file %s\n",
			    sess_in);
			ERR_print_errors(bio_err);
			goto end;
		}
		sess = PEM_read_bio_SSL_SESSION(stmp, NULL, 0, NULL);
		BIO_free(stmp);
		if (!sess) {
			BIO_printf(bio_err, "Can't open session file %s\n",
			    sess_in);
			ERR_print_errors(bio_err);
			goto end;
		}
		SSL_set_session(con, sess);
		SSL_SESSION_free(sess);
	}
	if (servername != NULL) {
		if (!SSL_set_tlsext_host_name(con, servername)) {
			BIO_printf(bio_err, "Unable to set TLS servername extension.\n");
			ERR_print_errors(bio_err);
			goto end;
		}
	}
/*	SSL_set_cipher_list(con,"RC4-MD5"); */

re_start:

	if (init_client(&s, host, port, socket_type, af) == 0) {
		BIO_printf(bio_err, "connect:errno=%d\n", errno);
		goto end;
	}
	BIO_printf(bio_c_out, "CONNECTED(%08X)\n", s);

	if (c_nbio) {
		if (!c_quiet)
			BIO_printf(bio_c_out, "turning on non blocking io\n");
		if (!BIO_socket_nbio(s, 1)) {
			ERR_print_errors(bio_err);
			goto end;
		}
	}
	if (c_Pause & 0x01)
		SSL_set_debug(con, 1);

	if (SSL_version(con) == DTLS1_VERSION) {

		sbio = BIO_new_dgram(s, BIO_NOCLOSE);
		if (getsockname(s, &peer, (void *) &peerlen) < 0) {
			BIO_printf(bio_err, "getsockname:errno=%d\n",
			    errno);
			shutdown(s, SHUT_RD);
			close(s);
			goto end;
		}
		(void) BIO_ctrl_set_connected(sbio, 1, &peer);

		if (enable_timeouts) {
			timeout.tv_sec = 0;
			timeout.tv_usec = DGRAM_RCV_TIMEOUT;
			BIO_ctrl(sbio, BIO_CTRL_DGRAM_SET_RECV_TIMEOUT, 0, &timeout);

			timeout.tv_sec = 0;
			timeout.tv_usec = DGRAM_SND_TIMEOUT;
			BIO_ctrl(sbio, BIO_CTRL_DGRAM_SET_SEND_TIMEOUT, 0, &timeout);
		}
		if (socket_mtu > 28) {
			SSL_set_options(con, SSL_OP_NO_QUERY_MTU);
			SSL_set_mtu(con, socket_mtu - 28);
		} else
			/* want to do MTU discovery */
			BIO_ctrl(sbio, BIO_CTRL_DGRAM_MTU_DISCOVER, 0, NULL);
	} else
		sbio = BIO_new_socket(s, BIO_NOCLOSE);

	if (nbio_test) {
		BIO *test;

		test = BIO_new(BIO_f_nbio_test());
		sbio = BIO_push(test, sbio);
	}
	if (c_debug) {
		SSL_set_debug(con, 1);
		BIO_set_callback(sbio, bio_dump_callback);
		BIO_set_callback_arg(sbio, (char *) bio_c_out);
	}
	if (c_msg) {
		SSL_set_msg_callback(con, msg_cb);
		SSL_set_msg_callback_arg(con, bio_c_out);
	}
	if (c_tlsextdebug) {
		SSL_set_tlsext_debug_callback(con, tlsext_cb);
		SSL_set_tlsext_debug_arg(con, bio_c_out);
	}
	if (c_status_req) {
		SSL_set_tlsext_status_type(con, TLSEXT_STATUSTYPE_ocsp);
		SSL_CTX_set_tlsext_status_cb(ctx, ocsp_resp_cb);
		SSL_CTX_set_tlsext_status_arg(ctx, bio_c_out);
	}

	SSL_set_bio(con, sbio, sbio);
	SSL_set_connect_state(con);

	/* ok, lets connect */
	read_tty = 1;
	write_tty = 0;
	tty_on = 0;
	read_ssl = 1;
	write_ssl = 1;

	cbuf_len = 0;
	cbuf_off = 0;
	sbuf_len = 0;
	sbuf_off = 0;

	/* This is an ugly hack that does a lot of assumptions */
	/*
	 * We do have to handle multi-line responses which may come in a
	 * single packet or not. We therefore have to use BIO_gets() which
	 * does need a buffering BIO. So during the initial chitchat we do
	 * push a buffering BIO into the chain that is removed again later on
	 * to not disturb the rest of the s_client operation.
	 */
	if (starttls_proto == PROTO_SMTP || starttls_proto == PROTO_LMTP) {
		int foundit = 0;
		BIO *fbio = BIO_new(BIO_f_buffer());
		BIO_push(fbio, sbio);
		/* wait for multi-line response to end from SMTP */
		do {
			mbuf_len = BIO_gets(fbio, mbuf, BUFSIZZ);
		}
		while (mbuf_len > 3 && mbuf[3] == '-');
		/* STARTTLS command requires EHLO... */
		BIO_printf(fbio, "%cHLO openssl.client.net\r\n",
			   starttls_proto == PROTO_SMTP ? 'E' : 'L');
		(void) BIO_flush(fbio);
		/* wait for multi-line response to end EHLO SMTP response */
		do {
			mbuf_len = BIO_gets(fbio, mbuf, BUFSIZZ);
			if (strstr(mbuf, "STARTTLS"))
				foundit = 1;
		}
		while (mbuf_len > 3 && mbuf[3] == '-');
		(void) BIO_flush(fbio);
		BIO_pop(fbio);
		BIO_free(fbio);
		if (!foundit)
			BIO_printf(bio_err,
			    "didn't found starttls in server response,"
			    " try anyway...\n");
		BIO_printf(sbio, "STARTTLS\r\n");
		BIO_read(sbio, sbuf, BUFSIZZ);
	} else if (starttls_proto == PROTO_POP3) {
		mbuf_len = BIO_read(sbio, mbuf, BUFSIZZ);
		if (mbuf_len == -1) {
			BIO_printf(bio_err, "BIO_read failed\n");
			goto end;
		}
		BIO_printf(sbio, "STLS\r\n");
		BIO_read(sbio, sbuf, BUFSIZZ);
	} else if (starttls_proto == PROTO_IMAP) {
		int foundit = 0;
		BIO *fbio = BIO_new(BIO_f_buffer());
		BIO_push(fbio, sbio);
		BIO_gets(fbio, mbuf, BUFSIZZ);
		/* STARTTLS command requires CAPABILITY... */
		BIO_printf(fbio, ". CAPABILITY\r\n");
		(void) BIO_flush(fbio);
		/* wait for multi-line CAPABILITY response */
		do {
			mbuf_len = BIO_gets(fbio, mbuf, BUFSIZZ);
			if (strstr(mbuf, "STARTTLS"))
				foundit = 1;
		}
		while (mbuf_len > 3 && mbuf[0] != '.');
		(void) BIO_flush(fbio);
		BIO_pop(fbio);
		BIO_free(fbio);
		if (!foundit)
			BIO_printf(bio_err,
			    "didn't found STARTTLS in server response,"
			    " try anyway...\n");
		BIO_printf(sbio, ". STARTTLS\r\n");
		BIO_read(sbio, sbuf, BUFSIZZ);
	} else if (starttls_proto == PROTO_FTP) {
		BIO *fbio = BIO_new(BIO_f_buffer());
		BIO_push(fbio, sbio);
		/* wait for multi-line response to end from FTP */
		do {
			mbuf_len = BIO_gets(fbio, mbuf, BUFSIZZ);
		}
		while (mbuf_len > 3 && mbuf[3] == '-');
		(void) BIO_flush(fbio);
		BIO_pop(fbio);
		BIO_free(fbio);
		BIO_printf(sbio, "AUTH TLS\r\n");
		BIO_read(sbio, sbuf, BUFSIZZ);
	} else if (starttls_proto == PROTO_XMPP) {
		int seen = 0;
		BIO_printf(sbio, "<stream:stream "
		    "xmlns:stream='http://etherx.jabber.org/streams' "
		    "xmlns='jabber:client' to='%s' version='1.0'>", xmpphost ? xmpphost : host);
		seen = BIO_read(sbio, mbuf, BUFSIZZ);

		if (seen <= 0)
			goto shut;

		mbuf[seen] = 0;
		while (!strstr(mbuf, "<starttls xmlns='urn:ietf:params:xml:ns:xmpp-tls'") &&
		       !strstr(mbuf, "<starttls xmlns=\"urn:ietf:params:xml:ns:xmpp-tls\"")) {
			seen = BIO_read(sbio, mbuf, BUFSIZZ);

			if (seen <= 0)
				goto shut;

			mbuf[seen] = 0;
		}
		BIO_printf(sbio, "<starttls xmlns='urn:ietf:params:xml:ns:xmpp-tls'/>");
		seen = BIO_read(sbio, sbuf, BUFSIZZ);
		sbuf[seen] = 0;
		if (!strstr(sbuf, "<proceed"))
			goto shut;
		mbuf[0] = 0;
	} else if (proxy != NULL) {
		BIO_printf(sbio, "CONNECT %s HTTP/1.0\r\n\r\n", connect);
		mbuf_len = BIO_read(sbio, mbuf, BUFSIZZ);
		if (mbuf_len == -1) {
			BIO_printf(bio_err, "BIO_read failed\n");
			goto end;
		}
	}
	for (;;) {
		struct pollfd pfd[3];	/* stdin, stdout, socket */
		int ptimeout = -1;

		if ((SSL_version(con) == DTLS1_VERSION) &&
		    DTLSv1_get_timeout(con, &timeout))
			ptimeout = timeout.tv_sec * 1000 + timeout.tv_usec / 1000;

		if (SSL_in_init(con) && !SSL_total_renegotiations(con)) {
			in_init = 1;
			tty_on = 0;
		} else {
			tty_on = 1;
			if (in_init) {
				in_init = 0;
				if (sess_out) {
					BIO *stmp = BIO_new_file(sess_out, "w");
					if (stmp) {
						PEM_write_bio_SSL_SESSION(stmp, SSL_get_session(con));
						BIO_free(stmp);
					} else
						BIO_printf(bio_err, "Error writing session file %s\n", sess_out);
				}
				print_stuff(bio_c_out, con, full_log);
				if (full_log > 0)
					full_log--;

				if (starttls_proto) {
					BIO_write(bio_err, mbuf, mbuf_len);
					/* We don't need to know any more */
					starttls_proto = PROTO_OFF;
				}
				if (reconnect) {
					reconnect--;
					BIO_printf(bio_c_out, "drop connection and then reconnect\n");
					SSL_shutdown(con);
					SSL_set_connect_state(con);
					shutdown(SSL_get_fd(con), SHUT_RD);
					close(SSL_get_fd(con));
					goto re_start;
				}
			}
		}

		ssl_pending = read_ssl && SSL_pending(con);

		pfd[0].fd = -1;
		pfd[1].fd = -1;
		if (!ssl_pending) {
			if (tty_on) {
				if (read_tty) {
					pfd[0].fd = fileno(stdin);
					pfd[0].events = POLLIN;
				}
				if (write_tty) {
					pfd[1].fd = fileno(stdout);
					pfd[1].events = POLLOUT;
				}
			}

			pfd[2].fd = SSL_get_fd(con);
			pfd[2].events = 0;
			if (read_ssl)
				pfd[2].events |= POLLIN;
			if (write_ssl)
				pfd[2].events |= POLLOUT;

/*			printf("mode tty(%d %d%d) ssl(%d%d)\n",
				tty_on,read_tty,write_tty,read_ssl,write_ssl);*/

			i = poll(pfd, 3, ptimeout);
			if (i < 0) {
				BIO_printf(bio_err, "bad select %d\n",
				    errno);
				goto shut;
				/* goto end; */
			}
		}
		if ((SSL_version(con) == DTLS1_VERSION) && DTLSv1_handle_timeout(con) > 0) {
			BIO_printf(bio_err, "TIMEOUT occured\n");
		}
		if (!ssl_pending && (pfd[2].revents & (POLLOUT|POLLERR|POLLNVAL))) {
			if (pfd[2].revents & (POLLERR|POLLNVAL)) {
				BIO_printf(bio_err, "poll error");
				goto shut;
			}
			k = SSL_write(con, &(cbuf[cbuf_off]),
			    (unsigned int) cbuf_len);
			switch (SSL_get_error(con, k)) {
			case SSL_ERROR_NONE:
				cbuf_off += k;
				cbuf_len -= k;
				if (k <= 0)
					goto end;
				/* we have done a  write(con,NULL,0); */
				if (cbuf_len <= 0) {
					read_tty = 1;
					write_ssl = 0;
				} else {	/* if (cbuf_len > 0) */
					read_tty = 0;
					write_ssl = 1;
				}
				break;
			case SSL_ERROR_WANT_WRITE:
				BIO_printf(bio_c_out, "write W BLOCK\n");
				write_ssl = 1;
				read_tty = 0;
				break;
			case SSL_ERROR_WANT_READ:
				BIO_printf(bio_c_out, "write R BLOCK\n");
				write_tty = 0;
				read_ssl = 1;
				write_ssl = 0;
				break;
			case SSL_ERROR_WANT_X509_LOOKUP:
				BIO_printf(bio_c_out, "write X BLOCK\n");
				break;
			case SSL_ERROR_ZERO_RETURN:
				if (cbuf_len != 0) {
					BIO_printf(bio_c_out, "shutdown\n");
					ret = 0;
					goto shut;
				} else {
					read_tty = 1;
					write_ssl = 0;
					break;
				}

			case SSL_ERROR_SYSCALL:
				if ((k != 0) || (cbuf_len != 0)) {
					BIO_printf(bio_err, "write:errno=%d\n",
					    errno);
					goto shut;
				} else {
					read_tty = 1;
					write_ssl = 0;
				}
				break;
			case SSL_ERROR_SSL:
				ERR_print_errors(bio_err);
				goto shut;
			}
		} else if (!ssl_pending &&
		    (pfd[1].revents & (POLLOUT|POLLERR|POLLNVAL))) {
			if (pfd[1].revents & (POLLERR|POLLNVAL)) {
				BIO_printf(bio_err, "poll error");
				goto shut;
			}
			i = write(fileno(stdout), &(sbuf[sbuf_off]), sbuf_len);

			if (i <= 0) {
				BIO_printf(bio_c_out, "DONE\n");
				ret = 0;
				goto shut;
				/* goto end; */
			}
			sbuf_len -= i;
			sbuf_off += i;
			if (sbuf_len <= 0) {
				read_ssl = 1;
				write_tty = 0;
			}
		} else if (ssl_pending || (pfd[2].revents & (POLLIN|POLLHUP))) {
#ifdef RENEG
			{
				static int iiii;
				if (++iiii == 52) {
					SSL_renegotiate(con);
					iiii = 0;
				}
			}
#endif
			k = SSL_read(con, sbuf, 1024 /* BUFSIZZ */ );

			switch (SSL_get_error(con, k)) {
			case SSL_ERROR_NONE:
				if (k <= 0)
					goto end;
				sbuf_off = 0;
				sbuf_len = k;

				read_ssl = 0;
				write_tty = 1;
				break;
			case SSL_ERROR_WANT_WRITE:
				BIO_printf(bio_c_out, "read W BLOCK\n");
				write_ssl = 1;
				read_tty = 0;
				break;
			case SSL_ERROR_WANT_READ:
				BIO_printf(bio_c_out, "read R BLOCK\n");
				write_tty = 0;
				read_ssl = 1;
				if ((read_tty == 0) && (write_ssl == 0))
					write_ssl = 1;
				break;
			case SSL_ERROR_WANT_X509_LOOKUP:
				BIO_printf(bio_c_out, "read X BLOCK\n");
				break;
			case SSL_ERROR_SYSCALL:
				ret = errno;
				BIO_printf(bio_err, "read:errno=%d\n", ret);
				goto shut;
			case SSL_ERROR_ZERO_RETURN:
				BIO_printf(bio_c_out, "closed\n");
				ret = 0;
				goto shut;
			case SSL_ERROR_SSL:
				ERR_print_errors(bio_err);
				goto shut;
				/* break; */
			}
		} else if (pfd[0].revents) {
			if (pfd[0].revents & (POLLERR|POLLNVAL)) {
				BIO_printf(bio_err, "poll error");
				goto shut;
			}
			if (crlf) {
				int j, lf_num;

				i = read(fileno(stdin), cbuf, BUFSIZZ / 2);
				lf_num = 0;
				/* both loops are skipped when i <= 0 */
				for (j = 0; j < i; j++)
					if (cbuf[j] == '\n')
						lf_num++;
				for (j = i - 1; j >= 0; j--) {
					cbuf[j + lf_num] = cbuf[j];
					if (cbuf[j] == '\n') {
						lf_num--;
						i++;
						cbuf[j + lf_num] = '\r';
					}
				}
				assert(lf_num == 0);
			} else
				i = read(fileno(stdin), cbuf, BUFSIZZ);

			if ((!c_ign_eof) && ((i <= 0) || (cbuf[0] == 'Q'))) {
				BIO_printf(bio_err, "DONE\n");
				ret = 0;
				goto shut;
			}
			if ((!c_ign_eof) && (cbuf[0] == 'R')) {
				BIO_printf(bio_err, "RENEGOTIATING\n");
				SSL_renegotiate(con);
				cbuf_len = 0;
			} else {
				cbuf_len = i;
				cbuf_off = 0;
			}

			write_ssl = 1;
			read_tty = 0;
		}
	}

	ret = 0;
shut:
	if (in_init)
		print_stuff(bio_c_out, con, full_log);
	SSL_shutdown(con);
	shutdown(SSL_get_fd(con), SHUT_RD);
	close(SSL_get_fd(con));
end:
	if (con != NULL) {
		if (prexit != 0)
			print_stuff(bio_c_out, con, 1);
		SSL_free(con);
	}
	free(next_proto.data);
	if (ctx != NULL)
		SSL_CTX_free(ctx);
	if (cert)
		X509_free(cert);
	if (key)
		EVP_PKEY_free(key);
	free(pass);
	if (vpm)
		X509_VERIFY_PARAM_free(vpm);
	if (cbuf != NULL) {
		explicit_bzero(cbuf, BUFSIZZ);
		free(cbuf);
	}
	if (sbuf != NULL) {
		explicit_bzero(sbuf, BUFSIZZ);
		free(sbuf);
	}
	if (mbuf != NULL) {
		explicit_bzero(mbuf, BUFSIZZ);
		free(mbuf);
	}
	if (bio_c_out != NULL) {
		BIO_free(bio_c_out);
		bio_c_out = NULL;
	}

	return (ret);
}


static void
print_stuff(BIO * bio, SSL * s, int full)
{
	X509 *peer = NULL;
	char *p;
	static const char *space = "                ";
	char buf[BUFSIZ];
	STACK_OF(X509) * sk;
	STACK_OF(X509_NAME) * sk2;
	const SSL_CIPHER *c;
	X509_NAME *xn;
	int j, i;
	unsigned char *exportedkeymat;

	if (full) {
		int got_a_chain = 0;

		sk = SSL_get_peer_cert_chain(s);
		if (sk != NULL) {
			got_a_chain = 1;	/* we don't have it for SSL2
						 * (yet) */

			BIO_printf(bio, "---\nCertificate chain\n");
			for (i = 0; i < sk_X509_num(sk); i++) {
				X509_NAME_oneline(X509_get_subject_name(
					sk_X509_value(sk, i)), buf, sizeof buf);
				BIO_printf(bio, "%2d s:%s\n", i, buf);
				X509_NAME_oneline(X509_get_issuer_name(
					sk_X509_value(sk, i)), buf, sizeof buf);
				BIO_printf(bio, "   i:%s\n", buf);
				if (c_showcerts)
					PEM_write_bio_X509(bio, sk_X509_value(sk, i));
			}
		}
		BIO_printf(bio, "---\n");
		peer = SSL_get_peer_certificate(s);
		if (peer != NULL) {
			BIO_printf(bio, "Server certificate\n");
			if (!(c_showcerts && got_a_chain))	/* Redundant if we
								 * showed the whole
								 * chain */
				PEM_write_bio_X509(bio, peer);
			X509_NAME_oneline(X509_get_subject_name(peer),
			    buf, sizeof buf);
			BIO_printf(bio, "subject=%s\n", buf);
			X509_NAME_oneline(X509_get_issuer_name(peer),
			    buf, sizeof buf);
			BIO_printf(bio, "issuer=%s\n", buf);
		} else
			BIO_printf(bio, "no peer certificate available\n");

		sk2 = SSL_get_client_CA_list(s);
		if ((sk2 != NULL) && (sk_X509_NAME_num(sk2) > 0)) {
			BIO_printf(bio, "---\nAcceptable client certificate CA names\n");
			for (i = 0; i < sk_X509_NAME_num(sk2); i++) {
				xn = sk_X509_NAME_value(sk2, i);
				X509_NAME_oneline(xn, buf, sizeof(buf));
				BIO_write(bio, buf, strlen(buf));
				BIO_write(bio, "\n", 1);
			}
		} else {
			BIO_printf(bio, "---\nNo client certificate CA names sent\n");
		}
		p = SSL_get_shared_ciphers(s, buf, sizeof buf);
		if (p != NULL) {
			/*
			 * This works only for SSL 2.  In later protocol
			 * versions, the client does not know what other
			 * ciphers (in addition to the one to be used in the
			 * current connection) the server supports.
			 */

			BIO_printf(bio, "---\nCiphers common between both SSL endpoints:\n");
			j = i = 0;
			while (*p) {
				if (*p == ':') {
					BIO_write(bio, space, 15 - j % 25);
					i++;
					j = 0;
					BIO_write(bio, ((i % 3) ? " " : "\n"), 1);
				} else {
					BIO_write(bio, p, 1);
					j++;
				}
				p++;
			}
			BIO_write(bio, "\n", 1);
		}
		BIO_printf(bio, "---\nSSL handshake has read %ld bytes and written %ld bytes\n",
		    BIO_number_read(SSL_get_rbio(s)),
		    BIO_number_written(SSL_get_wbio(s)));
	}
	BIO_printf(bio, (SSL_cache_hit(s) ? "---\nReused, " : "---\nNew, "));
	c = SSL_get_current_cipher(s);
	BIO_printf(bio, "%s, Cipher is %s\n",
	    SSL_CIPHER_get_version(c),
	    SSL_CIPHER_get_name(c));
	if (peer != NULL) {
		EVP_PKEY *pktmp;
		pktmp = X509_get_pubkey(peer);
		BIO_printf(bio, "Server public key is %d bit\n",
		    EVP_PKEY_bits(pktmp));
		EVP_PKEY_free(pktmp);
	}
	BIO_printf(bio, "Secure Renegotiation IS%s supported\n",
	    SSL_get_secure_renegotiation_support(s) ? "" : " NOT");

	/* Compression is not supported and will always be none. */
	BIO_printf(bio, "Compression: NONE\n");
	BIO_printf(bio, "Expansion: NONE\n");

#ifdef SSL_DEBUG
	{
		/* Print out local port of connection: useful for debugging */
		int sock;
		struct sockaddr_in ladd;
		socklen_t ladd_size = sizeof(ladd);
		sock = SSL_get_fd(s);
		getsockname(sock, (struct sockaddr *) & ladd, &ladd_size);
		BIO_printf(bio_c_out, "LOCAL PORT is %u\n", ntohs(ladd.sin_port));
	}
#endif

	if (next_proto.status != -1) {
		const unsigned char *proto;
		unsigned int proto_len;
		SSL_get0_next_proto_negotiated(s, &proto, &proto_len);
		BIO_printf(bio, "Next protocol: (%d) ", next_proto.status);
		BIO_write(bio, proto, proto_len);
		BIO_write(bio, "\n", 1);
	}
	{
		const unsigned char *proto;
		unsigned int proto_len;
		SSL_get0_alpn_selected(s, &proto, &proto_len);
		if (proto_len > 0) {
			BIO_printf(bio, "ALPN protocol: ");
			BIO_write(bio, proto, proto_len);
			BIO_write(bio, "\n", 1);
		} else
			BIO_printf(bio, "No ALPN negotiated\n");
	}

#ifndef OPENSSL_NO_SRTP
	{
		SRTP_PROTECTION_PROFILE *srtp_profile = SSL_get_selected_srtp_profile(s);

		if (srtp_profile)
			BIO_printf(bio, "SRTP Extension negotiated, profile=%s\n",
			    srtp_profile->name);
	}
#endif

	SSL_SESSION_print(bio, SSL_get_session(s));
	if (keymatexportlabel != NULL) {
		BIO_printf(bio, "Keying material exporter:\n");
		BIO_printf(bio, "    Label: '%s'\n", keymatexportlabel);
		BIO_printf(bio, "    Length: %i bytes\n", keymatexportlen);
		exportedkeymat = malloc(keymatexportlen);
		if (exportedkeymat != NULL) {
			if (!SSL_export_keying_material(s, exportedkeymat,
				keymatexportlen,
				keymatexportlabel,
				strlen(keymatexportlabel),
				NULL, 0, 0)) {
				BIO_printf(bio, "    Error\n");
			} else {
				BIO_printf(bio, "    Keying material: ");
				for (i = 0; i < keymatexportlen; i++)
					BIO_printf(bio, "%02X",
					    exportedkeymat[i]);
				BIO_printf(bio, "\n");
			}
			free(exportedkeymat);
		}
	}
	BIO_printf(bio, "---\n");
	if (peer != NULL)
		X509_free(peer);
	/* flush, or debugging output gets mixed with http response */
	(void) BIO_flush(bio);
}


static int
ocsp_resp_cb(SSL * s, void *arg)
{
	const unsigned char *p;
	int len;
	OCSP_RESPONSE *rsp;
	len = SSL_get_tlsext_status_ocsp_resp(s, &p);
	BIO_puts(arg, "OCSP response: ");
	if (!p) {
		BIO_puts(arg, "no response sent\n");
		return 1;
	}
	rsp = d2i_OCSP_RESPONSE(NULL, &p, len);
	if (!rsp) {
		BIO_puts(arg, "response parse error\n");
		BIO_dump_indent(arg, (char *) p, len, 4);
		return 0;
	}
	BIO_puts(arg, "\n======================================\n");
	OCSP_RESPONSE_print(arg, rsp, 0);
	BIO_puts(arg, "======================================\n");
	OCSP_RESPONSE_free(rsp);
	return 1;
}