text: /* apps/s_cb.c - callback functions used by s_client, s_server, and s_time */
  /* 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).
   *
   */
  
  #include <stdio.h>
  #include <stdlib.h>
  #define USE_SOCKETS
  #define NON_MAIN
  #include "apps.h"
  #undef NON_MAIN
  #undef USE_SOCKETS
  #include <openssl/err.h>
  #include <openssl/rand.h>
  #include <openssl/x509.h>
  #include <openssl/ssl.h>
  #include "s_apps.h"
  
  #define	COOKIE_SECRET_LENGTH	16
  
  int verify_depth=0;
  int verify_quiet=0;
  int verify_error=X509_V_OK;
  int verify_return_error=0;
  unsigned char cookie_secret[COOKIE_SECRET_LENGTH];
  int cookie_initialized=0;
  
  int MS_CALLBACK verify_callback(int ok, X509_STORE_CTX *ctx)
  	{
  	X509 *err_cert;
  	int err,depth;
  
  	err_cert=X509_STORE_CTX_get_current_cert(ctx);
  	err=	X509_STORE_CTX_get_error(ctx);
  	depth=	X509_STORE_CTX_get_error_depth(ctx);
  
  	if (!verify_quiet || !ok)
  		{
  		BIO_printf(bio_err,"depth=%d ",depth);
  		if (err_cert)
  			{
  			X509_NAME_print_ex(bio_err,
  					X509_get_subject_name(err_cert),
  					0, XN_FLAG_ONELINE);
  			BIO_puts(bio_err, "\n");
  			}
  		else
  			BIO_puts(bio_err, "<no cert>\n");
  		}
  	if (!ok)
  		{
  		BIO_printf(bio_err,"verify error:num=%d:%s\n",err,
  			X509_verify_cert_error_string(err));
  		if (verify_depth >= depth)
  			{
  			if (!verify_return_error)
  				ok=1;
  			verify_error=X509_V_OK;
  			}
  		else
  			{
  			ok=0;
  			verify_error=X509_V_ERR_CERT_CHAIN_TOO_LONG;
  			}
  		}
  	switch (err)
  		{
  	case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
  		BIO_puts(bio_err,"issuer= ");
  		X509_NAME_print_ex(bio_err, X509_get_issuer_name(err_cert),
  					0, XN_FLAG_ONELINE);
  		BIO_puts(bio_err, "\n");
  		break;
  	case X509_V_ERR_CERT_NOT_YET_VALID:
  	case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
  		BIO_printf(bio_err,"notBefore=");
  		ASN1_TIME_print(bio_err,X509_get_notBefore(err_cert));
  		BIO_printf(bio_err,"\n");
  		break;
  	case X509_V_ERR_CERT_HAS_EXPIRED:
  	case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
  		BIO_printf(bio_err,"notAfter=");
  		ASN1_TIME_print(bio_err,X509_get_notAfter(err_cert));
  		BIO_printf(bio_err,"\n");
  		break;
  	case X509_V_ERR_NO_EXPLICIT_POLICY:
  		if (!verify_quiet)
  			policies_print(bio_err, ctx);
  		break;
  		}
  	if (err == X509_V_OK && ok == 2 && !verify_quiet)
  		policies_print(bio_err, ctx);
  	if (ok && !verify_quiet)
  		BIO_printf(bio_err,"verify return:%d\n",ok);
  	return(ok);
  	}
  
  int set_cert_stuff(SSL_CTX *ctx, char *cert_file, char *key_file)
  	{
  	if (cert_file != NULL)
  		{
  		/*
  		SSL *ssl;
  		X509 *x509;
  		*/
  
  		if (SSL_CTX_use_certificate_file(ctx,cert_file,
  			SSL_FILETYPE_PEM) <= 0)
  			{
  			BIO_printf(bio_err,"unable to get certificate from '%s'\n",cert_file);
  			ERR_print_errors(bio_err);
  			return(0);
  			}
  		if (key_file == NULL) key_file=cert_file;
  		if (SSL_CTX_use_PrivateKey_file(ctx,key_file,
  			SSL_FILETYPE_PEM) <= 0)
  			{
  			BIO_printf(bio_err,"unable to get private key from '%s'\n",key_file);
  			ERR_print_errors(bio_err);
  			return(0);
  			}
  
  		/*
  		In theory this is no longer needed 
  		ssl=SSL_new(ctx);
  		x509=SSL_get_certificate(ssl);
  
  		if (x509 != NULL) {
  			EVP_PKEY *pktmp;
  			pktmp = X509_get_pubkey(x509);
  			EVP_PKEY_copy_parameters(pktmp,
  						SSL_get_privatekey(ssl));
  			EVP_PKEY_free(pktmp);
  		}
  		SSL_free(ssl);
  		*/
  
  		/* If we are using DSA, we can copy the parameters from
  		 * the private key */
  
  
  		/* Now we know that a key and cert have been set against
  		 * the SSL context */
  		if (!SSL_CTX_check_private_key(ctx))
  			{
  			BIO_printf(bio_err,"Private key does not match the certificate public key\n");
  			return(0);
  			}
  		}
  	return(1);
  	}
  
  int set_cert_key_stuff(SSL_CTX *ctx, X509 *cert, EVP_PKEY *key,
  		       STACK_OF(X509) *chain, int build_chain)
  	{
  	int chflags = chain ? SSL_BUILD_CHAIN_FLAG_CHECK : 0;
  	if (cert == NULL)
  		return 1;
  	if (SSL_CTX_use_certificate(ctx,cert) <= 0)
  		{
  		BIO_printf(bio_err,"error setting certificate\n");
  		ERR_print_errors(bio_err);
  		return 0;
  		}
  
   	if (SSL_CTX_use_PrivateKey(ctx,key) <= 0)
   		{
   		BIO_printf(bio_err,"error setting private key\n");
   		ERR_print_errors(bio_err);
   		return 0;
   		}
  		 
  	/* Now we know that a key and cert have been set against
   	 * the SSL context */
  	if (!SSL_CTX_check_private_key(ctx))
  		{
  		BIO_printf(bio_err,"Private key does not match the certificate public key\n");
  		return 0;
  		}
  	if (chain && !SSL_CTX_set1_chain(ctx, chain))
  		{
  		BIO_printf(bio_err,"error setting certificate chain\n");
  		ERR_print_errors(bio_err);
  		return 0;
  		}
  	if (build_chain && !SSL_CTX_build_cert_chain(ctx, chflags))
  		{
  		BIO_printf(bio_err,"error building certificate chain\n");
  		ERR_print_errors(bio_err);
  		return 0;
  		}
  	return 1;
  	}
  
  static void ssl_print_client_cert_types(BIO *bio, SSL *s)
  	{
  	const unsigned char *p;
  	int i;
  	int cert_type_num = SSL_get0_certificate_types(s, &p);
  	if (!cert_type_num)
  		return;
  	BIO_puts(bio, "Client Certificate Types: ");
  	for (i = 0; i < cert_type_num; i++)
  		{
  		unsigned char cert_type = p[i];
  		char *cname;
  		switch(cert_type)
  			{
  		case TLS_CT_RSA_SIGN:
  			cname = "RSA sign";
  			break;
  
  		case TLS_CT_DSS_SIGN:
  			cname = "DSA sign";
  			break;
  
  		case TLS_CT_RSA_FIXED_DH:
  			cname = "RSA fixed DH";
  			break;
  
  		case TLS_CT_DSS_FIXED_DH:
  			cname = "DSS fixed DH";
  			break;
  
  		case TLS_CT_ECDSA_SIGN:
  			cname = "ECDSA sign";
  			break;
  
  		case TLS_CT_RSA_FIXED_ECDH:
  			cname = "RSA fixed ECDH";
  			break;
  
  		case TLS_CT_ECDSA_FIXED_ECDH:
  			cname = "ECDSA fixed ECDH";
  			break;
  
  		case TLS_CT_GOST94_SIGN:
  			cname = "GOST94 Sign";
  			break;
  
  		case TLS_CT_GOST01_SIGN:
  			cname = "GOST01 Sign";
  			break;
  
  		default:
  			 cname = NULL;
  			}
  
  		if (i)
  			BIO_puts(bio, ", ");
  
  		if (cname)
  			BIO_puts(bio, cname);
  		else
  			BIO_printf(bio, "UNKNOWN (%d),", cert_type);
  		}
  	BIO_puts(bio, "\n");
  	}
  
  static int do_print_sigalgs(BIO *out, SSL *s, int shared)
  	{
  	int i, nsig, client;
  	client = SSL_is_server(s) ? 0 : 1;
  	if (shared)
  		nsig = SSL_get_shared_sigalgs(s, -1, NULL, NULL, NULL,
  							NULL, NULL);
  	else
  		nsig = SSL_get_sigalgs(s, -1, NULL, NULL, NULL, NULL, NULL);
  	if (nsig == 0)
  		return 1;
  
  	if (shared)
  		BIO_puts(out, "Shared ");
  
  	if (client)
  		BIO_puts(out, "Requested ");
  	BIO_puts(out, "Signature Algorithms: ");
  	for (i = 0; i < nsig; i++)
  		{
  		int hash_nid, sign_nid;
  		unsigned char rhash, rsign;
  		const char *sstr = NULL;
  		if (shared)
  			SSL_get_shared_sigalgs(s, i, &sign_nid, &hash_nid, NULL,
  							&rsign, &rhash);
  		else
  			SSL_get_sigalgs(s, i, &sign_nid, &hash_nid, NULL,
  							&rsign, &rhash);
  		if (i)
  			BIO_puts(out, ":");
  		if (sign_nid == EVP_PKEY_RSA)
  			sstr = "RSA";
  		else if(sign_nid == EVP_PKEY_DSA)
  			sstr = "DSA";
  		else if(sign_nid == EVP_PKEY_EC)
  			sstr = "ECDSA";
  		if (sstr)
  			BIO_printf(out,"%s+", sstr);
  		else
  			BIO_printf(out,"0x%02X+", (int)rsign);
  		if (hash_nid != NID_undef)
  			BIO_printf(out, "%s", OBJ_nid2sn(hash_nid));
  		else
  			BIO_printf(out,"0x%02X", (int)rhash);
  		}
  	BIO_puts(out, "\n");
  	return 1;
  	}
  
  int ssl_print_sigalgs(BIO *out, SSL *s)
  	{
  	int mdnid;
  	if (!SSL_is_server(s))
  		ssl_print_client_cert_types(out, s);
  	do_print_sigalgs(out, s, 0);
  	do_print_sigalgs(out, s, 1);
  	if (SSL_get_peer_signature_nid(s, &mdnid))
  		BIO_printf(out, "Peer signing digest: %s\n", OBJ_nid2sn(mdnid));
  	return 1;
  	}
  #ifndef OPENSSL_NO_EC
  int ssl_print_point_formats(BIO *out, SSL *s)
  	{
  	int i, nformats;
  	const char *pformats;
  	nformats = SSL_get0_ec_point_formats(s, &pformats);
  	if (nformats <= 0)
  		return 1;
  	BIO_puts(out, "Supported Elliptic Curve Point Formats: ");
  	for (i = 0; i < nformats; i++, pformats++)
  		{
  		if (i)
  			BIO_puts(out, ":");
  		switch(*pformats)
  			{
  		case TLSEXT_ECPOINTFORMAT_uncompressed:
  			BIO_puts(out, "uncompressed");
  			break;
  
  		case TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime:
  			BIO_puts(out, "ansiX962_compressed_prime");
  			break;
  
  		case TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2:
  			BIO_puts(out, "ansiX962_compressed_char2");
  			break;
  
  		default:
  			BIO_printf(out, "unknown(%d)", (int)*pformats);
  			break;
  
  			}
  		}
  	if (nformats <= 0)
  		BIO_puts(out, "NONE");
  	BIO_puts(out, "\n");
  	return 1;
  	}
  
  int ssl_print_curves(BIO *out, SSL *s, int noshared)
  	{
  	int i, ncurves, *curves, nid;
  	const char *cname;
  	ncurves = SSL_get1_curves(s, NULL);
  	if (ncurves <= 0)
  		return 1;
  	curves = OPENSSL_malloc(ncurves * sizeof(int));
  	SSL_get1_curves(s, curves);
  
  	BIO_puts(out, "Supported Elliptic Curves: ");
  	for (i = 0; i < ncurves; i++)
  		{
  		if (i)
  			BIO_puts(out, ":");
  		nid = curves[i];
  		/* If unrecognised print out hex version */
  		if (nid & TLSEXT_nid_unknown)
  			BIO_printf(out, "0x%04X", nid & 0xFFFF);
  		else
  			{
  			/* Use NIST name for curve if it exists */
  			cname = EC_curve_nid2nist(nid);
  			if (!cname)
  				cname = OBJ_nid2sn(nid);
  			BIO_printf(out, "%s", cname);
  			}
  		}
  	if (ncurves == 0)
  		BIO_puts(out, "NONE");
  	OPENSSL_free(curves);
  	if (noshared)
  		{
  		BIO_puts(out, "\n");
  		return 1;
  		}
  	BIO_puts(out, "\nShared Elliptic curves: ");
  	ncurves = SSL_get_shared_curve(s, -1);
  	for (i = 0; i < ncurves; i++)
  		{
  		if (i)
  			BIO_puts(out, ":");
  		nid = SSL_get_shared_curve(s, i);
  		cname = EC_curve_nid2nist(nid);
  		if (!cname)
  			cname = OBJ_nid2sn(nid);
  		BIO_printf(out, "%s", cname);
  		}
  	if (ncurves == 0)
  		BIO_puts(out, "NONE");
  	BIO_puts(out, "\n");
  	return 1;
  	}
  #endif
  int ssl_print_tmp_key(BIO *out, SSL *s)
  	{
  	EVP_PKEY *key;
  	if (!SSL_get_server_tmp_key(s, &key))
  		return 1;
  	BIO_puts(out, "Server Temp Key: ");
  	switch (EVP_PKEY_id(key))
  		{
  	case EVP_PKEY_RSA:
  		BIO_printf(out, "RSA, %d bits\n", EVP_PKEY_bits(key));
  		break;
  
  	case EVP_PKEY_DH:
  		BIO_printf(out, "DH, %d bits\n", EVP_PKEY_bits(key));
  		break;
  #ifndef OPENSSL_NO_ECDH
  	case EVP_PKEY_EC:
  			{
  			EC_KEY *ec = EVP_PKEY_get1_EC_KEY(key);
  			int nid;
  			const char *cname;
  			nid = EC_GROUP_get_curve_name(EC_KEY_get0_group(ec));
  			EC_KEY_free(ec);
  			cname = EC_curve_nid2nist(nid);
  			if (!cname)
  				cname = OBJ_nid2sn(nid);
  			BIO_printf(out, "ECDH, %s, %d bits\n",
  						cname, EVP_PKEY_bits(key));
  			}
  #endif
  		}
  	EVP_PKEY_free(key);
  	return 1;
  	}
  		
  
  long MS_CALLBACK bio_dump_callback(BIO *bio, int cmd, const char *argp,
  				   int argi, long argl, long ret)
  	{
  	BIO *out;
  
  	out=(BIO *)BIO_get_callback_arg(bio);
  	if (out == NULL) return(ret);
  
  	if (cmd == (BIO_CB_READ|BIO_CB_RETURN))
  		{
  		BIO_printf(out,"read from %p [%p] (%lu bytes => %ld (0x%lX))\n",
   			(void *)bio,argp,(unsigned long)argi,ret,ret);
  		BIO_dump(out,argp,(int)ret);
  		return(ret);
  		}
  	else if (cmd == (BIO_CB_WRITE|BIO_CB_RETURN))
  		{
  		BIO_printf(out,"write to %p [%p] (%lu bytes => %ld (0x%lX))\n",
  			(void *)bio,argp,(unsigned long)argi,ret,ret);
  		BIO_dump(out,argp,(int)ret);
  		}
  	return(ret);
  	}
  
  void MS_CALLBACK apps_ssl_info_callback(const SSL *s, int where, int ret)
  	{
  	const char *str;
  	int w;
  
  	w=where& ~SSL_ST_MASK;
  
  	if (w & SSL_ST_CONNECT) str="SSL_connect";
  	else if (w & SSL_ST_ACCEPT) str="SSL_accept";
  	else str="undefined";
  
  	if (where & SSL_CB_LOOP)
  		{
  		BIO_printf(bio_err,"%s:%s\n",str,SSL_state_string_long(s));
  		}
  	else if (where & SSL_CB_ALERT)
  		{
  		str=(where & SSL_CB_READ)?"read":"write";
  		BIO_printf(bio_err,"SSL3 alert %s:%s:%s\n",
  			str,
  			SSL_alert_type_string_long(ret),
  			SSL_alert_desc_string_long(ret));
  		}
  	else if (where & SSL_CB_EXIT)
  		{
  		if (ret == 0)
  			BIO_printf(bio_err,"%s:failed in %s\n",
  				str,SSL_state_string_long(s));
  		else if (ret < 0)
  			{
  			BIO_printf(bio_err,"%s:error in %s\n",
  				str,SSL_state_string_long(s));
  			}
  		}
  	}
  
  
  void MS_CALLBACK msg_cb(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg)
  	{
  	BIO *bio = arg;
  	const char *str_write_p, *str_version, *str_content_type = "", *str_details1 = "", *str_details2= "";
  	
  	str_write_p = write_p ? ">>>" : "<<<";
  
  	switch (version)
  		{
  	case SSL2_VERSION:
  		str_version = "SSL 2.0";
  		break;
  	case SSL3_VERSION:
  		str_version = "SSL 3.0 ";
  		break;
  	case TLS1_VERSION:
  		str_version = "TLS 1.0 ";
  		break;
  	case TLS1_1_VERSION:
  		str_version = "TLS 1.1 ";
  		break;
  	case TLS1_2_VERSION:
  		str_version = "TLS 1.2 ";
  		break;
  	case DTLS1_VERSION:
  		str_version = "DTLS 1.0 ";
  		break;
  	case DTLS1_BAD_VER:
  		str_version = "DTLS 1.0 (bad) ";
  		break;
  	default:
  		str_version = "???";
  		}
  
  	if (version == SSL2_VERSION)
  		{
  		str_details1 = "???";
  
  		if (len > 0)
  			{
  			switch (((const unsigned char*)buf)[0])
  				{
  				case 0:
  					str_details1 = ", ERROR:";
  					str_details2 = " ???";
  					if (len >= 3)
  						{
  						unsigned err = (((const unsigned char*)buf)[1]<<8) + ((const unsigned char*)buf)[2];
  						
  						switch (err)
  							{
  						case 0x0001:
  							str_details2 = " NO-CIPHER-ERROR";
  							break;
  						case 0x0002:
  							str_details2 = " NO-CERTIFICATE-ERROR";
  							break;
  						case 0x0004:
  							str_details2 = " BAD-CERTIFICATE-ERROR";
  							break;
  						case 0x0006:
  							str_details2 = " UNSUPPORTED-CERTIFICATE-TYPE-ERROR";
  							break;
  							}
  						}
  
  					break;
  				case 1:
  					str_details1 = ", CLIENT-HELLO";
  					break;
  				case 2:
  					str_details1 = ", CLIENT-MASTER-KEY";
  					break;
  				case 3:
  					str_details1 = ", CLIENT-FINISHED";
  					break;
  				case 4:
  					str_details1 = ", SERVER-HELLO";
  					break;
  				case 5:
  					str_details1 = ", SERVER-VERIFY";
  					break;
  				case 6:
  					str_details1 = ", SERVER-FINISHED";
  					break;
  				case 7:
  					str_details1 = ", REQUEST-CERTIFICATE";
  					break;
  				case 8:
  					str_details1 = ", CLIENT-CERTIFICATE";
  					break;
  				}
  			}
  		}
  
  	if (version == SSL3_VERSION ||
  	    version == TLS1_VERSION ||
  	    version == TLS1_1_VERSION ||
  	    version == TLS1_2_VERSION ||
  	    version == DTLS1_VERSION ||
  	    version == DTLS1_BAD_VER)
  		{
  		switch (content_type)
  			{
  		case 20:
  			str_content_type = "ChangeCipherSpec";
  			break;
  		case 21:
  			str_content_type = "Alert";
  			break;
  		case 22:
  			str_content_type = "Handshake";
  			break;
  			}
  
  		if (content_type == 21) /* Alert */
  			{
  			str_details1 = ", ???";
  			
  			if (len == 2)
  				{
  				switch (((const unsigned char*)buf)[0])
  					{
  				case 1:
  					str_details1 = ", warning";
  					break;
  				case 2:
  					str_details1 = ", fatal";
  					break;
  					}
  
  				str_details2 = " ???";
  				switch (((const unsigned char*)buf)[1])
  					{
  				case 0:
  					str_details2 = " close_notify";
  					break;
  				case 10:
  					str_details2 = " unexpected_message";
  					break;
  				case 20:
  					str_details2 = " bad_record_mac";
  					break;
  				case 21:
  					str_details2 = " decryption_failed";
  					break;
  				case 22:
  					str_details2 = " record_overflow";
  					break;
  				case 30:
  					str_details2 = " decompression_failure";
  					break;
  				case 40:
  					str_details2 = " handshake_failure";
  					break;
  				case 42:
  					str_details2 = " bad_certificate";
  					break;
  				case 43:
  					str_details2 = " unsupported_certificate";
  					break;
  				case 44:
  					str_details2 = " certificate_revoked";
  					break;
  				case 45:
  					str_details2 = " certificate_expired";
  					break;
  				case 46:
  					str_details2 = " certificate_unknown";
  					break;
  				case 47:
  					str_details2 = " illegal_parameter";
  					break;
  				case 48:
  					str_details2 = " unknown_ca";
  					break;
  				case 49:
  					str_details2 = " access_denied";
  					break;
  				case 50:
  					str_details2 = " decode_error";
  					break;
  				case 51:
  					str_details2 = " decrypt_error";
  					break;
  				case 60:
  					str_details2 = " export_restriction";
  					break;
  				case 70:
  					str_details2 = " protocol_version";
  					break;
  				case 71:
  					str_details2 = " insufficient_security";
  					break;
  				case 80:
  					str_details2 = " internal_error";
  					break;
  				case 90:
  					str_details2 = " user_canceled";
  					break;
  				case 100:
  					str_details2 = " no_renegotiation";
  					break;
  				case 110:
  					str_details2 = " unsupported_extension";
  					break;
  				case 111:
  					str_details2 = " certificate_unobtainable";
  					break;
  				case 112:
  					str_details2 = " unrecognized_name";
  					break;
  				case 113:
  					str_details2 = " bad_certificate_status_response";
  					break;
  				case 114:
  					str_details2 = " bad_certificate_hash_value";
  					break;
  				case 115:
  					str_details2 = " unknown_psk_identity";
  					break;
  					}
  				}
  			}
  		
  		if (content_type == 22) /* Handshake */
  			{
  			str_details1 = "???";
  
  			if (len > 0)
  				{
  				switch (((const unsigned char*)buf)[0])
  					{
  				case 0:
  					str_details1 = ", HelloRequest";
  					break;
  				case 1:
  					str_details1 = ", ClientHello";
  					break;
  				case 2:
  					str_details1 = ", ServerHello";
  					break;
  				case 3:
  					str_details1 = ", HelloVerifyRequest";
  					break;
  				case 11:
  					str_details1 = ", Certificate";
  					break;
  				case 12:
  					str_details1 = ", ServerKeyExchange";
  					break;
  				case 13:
  					str_details1 = ", CertificateRequest";
  					break;
  				case 14:
  					str_details1 = ", ServerHelloDone";
  					break;
  				case 15:
  					str_details1 = ", CertificateVerify";
  					break;
  				case 16:
  					str_details1 = ", ClientKeyExchange";
  					break;
  				case 20:
  					str_details1 = ", Finished";
  					break;
  				case 23:
  					str_details1 = ", SupplementalData";
  					break;
  					}
  				}
  			}
  
  #ifndef OPENSSL_NO_HEARTBEATS
  		if (content_type == 24) /* Heartbeat */
  			{
  			str_details1 = ", Heartbeat";
  			
  			if (len > 0)
  				{
  				switch (((const unsigned char*)buf)[0])
  					{
  				case 1:
  					str_details1 = ", HeartbeatRequest";
  					break;
  				case 2:
  					str_details1 = ", HeartbeatResponse";
  					break;
  					}
  				}
  			}
  #endif
  		}
  
  	BIO_printf(bio, "%s %s%s [length %04lx]%s%s\n", str_write_p, str_version, str_content_type, (unsigned long)len, str_details1, str_details2);
  
  	if (len > 0)
  		{
  		size_t num, i;
  		
  		BIO_printf(bio, "   ");
  		num = len;
  #if 0
  		if (num > 16)
  			num = 16;
  #endif
  		for (i = 0; i < num; i++)
  			{
  			if (i % 16 == 0 && i > 0)
  				BIO_printf(bio, "\n   ");
  			BIO_printf(bio, " %02x", ((const unsigned char*)buf)[i]);
  			}
  		if (i < len)
  			BIO_printf(bio, " ...");
  		BIO_printf(bio, "\n");
  		}
  	(void)BIO_flush(bio);
  	}
  
  void MS_CALLBACK tlsext_cb(SSL *s, int client_server, int type,
  					unsigned char *data, int len,
  					void *arg)
  	{
  	BIO *bio = arg;
  	char *extname;
  
  	switch(type)
  		{
  		case TLSEXT_TYPE_server_name:
  		extname = "server name";
  		break;
  
  		case TLSEXT_TYPE_max_fragment_length:
  		extname = "max fragment length";
  		break;
  
  		case TLSEXT_TYPE_client_certificate_url:
  		extname = "client certificate URL";
  		break;
  
  		case TLSEXT_TYPE_trusted_ca_keys:
  		extname = "trusted CA keys";
  		break;
  
  		case TLSEXT_TYPE_truncated_hmac:
  		extname = "truncated HMAC";
  		break;
  
  		case TLSEXT_TYPE_status_request:
  		extname = "status request";
  		break;
  
  		case TLSEXT_TYPE_user_mapping:
  		extname = "user mapping";
  		break;
  
  		case TLSEXT_TYPE_client_authz:
  		extname = "client authz";
  		break;
  
  		case TLSEXT_TYPE_server_authz:
  		extname = "server authz";
  		break;
  
  		case TLSEXT_TYPE_cert_type:
  		extname = "cert type";
  		break;
  
  		case TLSEXT_TYPE_elliptic_curves:
  		extname = "elliptic curves";
  		break;
  
  		case TLSEXT_TYPE_ec_point_formats:
  		extname = "EC point formats";
  		break;
  
  		case TLSEXT_TYPE_srp:
  		extname = "SRP";
  		break;
  
  		case TLSEXT_TYPE_signature_algorithms:
  		extname = "signature algorithms";
  		break;
  
  		case TLSEXT_TYPE_use_srtp:
  		extname = "use SRTP";
  		break;
  
  		case TLSEXT_TYPE_heartbeat:
  		extname = "heartbeat";
  		break;
  
  		case TLSEXT_TYPE_session_ticket:
  		extname = "session ticket";
  		break;
  
  		case TLSEXT_TYPE_renegotiate: 
  		extname = "renegotiation info";
  		break;
  
  #ifdef TLSEXT_TYPE_opaque_prf_input
  		case TLSEXT_TYPE_opaque_prf_input:
  		extname = "opaque PRF input";
  		break;
  #endif
  #ifdef TLSEXT_TYPE_next_proto_neg
  		case TLSEXT_TYPE_next_proto_neg:
  		extname = "next protocol";
  		break;
  #endif
  
  		default:
  		extname = "unknown";
  		break;
  
  		}
  	
  	BIO_printf(bio, "TLS %s extension \"%s\" (id=%d), len=%d\n",
  			client_server ? "server": "client",
  			extname, type, len);
  	BIO_dump(bio, (char *)data, len);
  	(void)BIO_flush(bio);
  	}
  
  int MS_CALLBACK generate_cookie_callback(SSL *ssl, unsigned char *cookie, unsigned int *cookie_len)
  	{
  	unsigned char *buffer, result[EVP_MAX_MD_SIZE];
  	unsigned int length, resultlength;
  	union {
  		struct sockaddr sa;
  		struct sockaddr_in s4;
  #if OPENSSL_USE_IPV6
  		struct sockaddr_in6 s6;
  #endif
  	} peer;
  
  	/* Initialize a random secret */
  	if (!cookie_initialized)
  		{
  		if (!RAND_bytes(cookie_secret, COOKIE_SECRET_LENGTH))
  			{
  			BIO_printf(bio_err,"error setting random cookie secret\n");
  			return 0;
  			}
  		cookie_initialized = 1;
  		}
  
  	/* Read peer information */
  	(void)BIO_dgram_get_peer(SSL_get_rbio(ssl), &peer);
  
  	/* Create buffer with peer's address and port */
  	length = 0;
  	switch (peer.sa.sa_family)
  		{
  	case AF_INET:
  		length += sizeof(struct in_addr);
  		length += sizeof(peer.s4.sin_port);
  		break;
  #if OPENSSL_USE_IPV6
  	case AF_INET6:
  		length += sizeof(struct in6_addr);
  		length += sizeof(peer.s6.sin6_port);
  		break;
  #endif
  	default:
  		OPENSSL_assert(0);
  		break;
  		}
  	buffer = OPENSSL_malloc(length);
  
  	if (buffer == NULL)
  		{
  		BIO_printf(bio_err,"out of memory\n");
  		return 0;
  		}
  
  	switch (peer.sa.sa_family)
  		{
  	case AF_INET:
  		memcpy(buffer,
  		       &peer.s4.sin_port,
  		       sizeof(peer.s4.sin_port));
  		memcpy(buffer + sizeof(peer.s4.sin_port),
  		       &peer.s4.sin_addr,
  		       sizeof(struct in_addr));
  		break;
  #if OPENSSL_USE_IPV6
  	case AF_INET6:
  		memcpy(buffer,
  		       &peer.s6.sin6_port,
  		       sizeof(peer.s6.sin6_port));
  		memcpy(buffer + sizeof(peer.s6.sin6_port),
  		       &peer.s6.sin6_addr,
  		       sizeof(struct in6_addr));
  		break;
  #endif
  	default:
  		OPENSSL_assert(0);
  		break;
  		}
  
  	/* Calculate HMAC of buffer using the secret */
  	HMAC(EVP_sha1(), cookie_secret, COOKIE_SECRET_LENGTH,
  	     buffer, length, result, &resultlength);
  	OPENSSL_free(buffer);
  
  	memcpy(cookie, result, resultlength);
  	*cookie_len = resultlength;
  
  	return 1;
  	}
  
  int MS_CALLBACK verify_cookie_callback(SSL *ssl, unsigned char *cookie, unsigned int cookie_len)
  	{
  	unsigned char *buffer, result[EVP_MAX_MD_SIZE];
  	unsigned int length, resultlength;
  	union {
  		struct sockaddr sa;
  		struct sockaddr_in s4;
  #if OPENSSL_USE_IPV6
  		struct sockaddr_in6 s6;
  #endif
  	} peer;
  
  	/* If secret isn't initialized yet, the cookie can't be valid */
  	if (!cookie_initialized)
  		return 0;
  
  	/* Read peer information */
  	(void)BIO_dgram_get_peer(SSL_get_rbio(ssl), &peer);
  
  	/* Create buffer with peer's address and port */
  	length = 0;
  	switch (peer.sa.sa_family)
  		{
  	case AF_INET:
  		length += sizeof(struct in_addr);
  		length += sizeof(peer.s4.sin_port);
  		break;
  #if OPENSSL_USE_IPV6
  	case AF_INET6:
  		length += sizeof(struct in6_addr);
  		length += sizeof(peer.s6.sin6_port);
  		break;
  #endif
  	default:
  		OPENSSL_assert(0);
  		break;
  		}
  	buffer = OPENSSL_malloc(length);
  	
  	if (buffer == NULL)
  		{
  		BIO_printf(bio_err,"out of memory\n");
  		return 0;
  		}
  
  	switch (peer.sa.sa_family)
  		{
  	case AF_INET:
  		memcpy(buffer,
  		       &peer.s4.sin_port,
  		       sizeof(peer.s4.sin_port));
  		memcpy(buffer + sizeof(peer.s4.sin_port),
  		       &peer.s4.sin_addr,
  		       sizeof(struct in_addr));
  		break;
  #if OPENSSL_USE_IPV6
  	case AF_INET6:
  		memcpy(buffer,
  		       &peer.s6.sin6_port,
  		       sizeof(peer.s6.sin6_port));
  		memcpy(buffer + sizeof(peer.s6.sin6_port),
  		       &peer.s6.sin6_addr,
  		       sizeof(struct in6_addr));
  		break;
  #endif
  	default:
  		OPENSSL_assert(0);
  		break;
  		}
  
  	/* Calculate HMAC of buffer using the secret */
  	HMAC(EVP_sha1(), cookie_secret, COOKIE_SECRET_LENGTH,
  	     buffer, length, result, &resultlength);
  	OPENSSL_free(buffer);
  
  	if (cookie_len == resultlength && memcmp(result, cookie, resultlength) == 0)
  		return 1;
  
  	return 0;
  	}
  
  /* Example of extended certificate handling. Where the standard support
   * of one certificate per algorithm is not sufficient an application
   * can decide which certificate(s) to use at runtime based on whatever
   * criteria it deems appropriate.
   */
  
  /* Linked list of certificates, keys and chains */
  struct  ssl_excert_st
  	{
  	int certform;
  	const char *certfile;
  	int keyform;
  	const char *keyfile;
  	const char *chainfile;
  	X509 *cert;
  	EVP_PKEY *key;
  	STACK_OF(X509) *chain;
  	int build_chain;
  	struct ssl_excert_st *next, *prev;
  	};
  
  struct chain_flags
  	{
  	int flag;
  	const char *name;
  	};
  
  struct chain_flags chain_flags_list[] =
  	{
  		{CERT_PKEY_VALID, "Overall Validity"},
  		{CERT_PKEY_SIGN,  "Sign with EE key"},
  		{CERT_PKEY_EE_SIGNATURE, "EE signature"},
  		{CERT_PKEY_CA_SIGNATURE, "CA signature"},
  		{CERT_PKEY_EE_PARAM, "EE key parameters"},
  		{CERT_PKEY_CA_PARAM, "CA key parameters"},
  		{CERT_PKEY_EXPLICIT_SIGN,  "Explicity sign with EE key"},
  		{CERT_PKEY_ISSUER_NAME,  "Issuer Name"},
  		{CERT_PKEY_CERT_TYPE,  "Certificate Type"},
  		{0, NULL}
  	};
  
  
  static void print_chain_flags(BIO *out, int flags)
  	{
  	struct chain_flags *ctmp = chain_flags_list;
  	while(ctmp->name)
  		{
  		BIO_printf(out, "\t%s: %s\n", ctmp->name,
  				flags & ctmp->flag ? "OK" : "NOT OK");
  		ctmp++;
  		}
  	}
  
  /* Very basic selection callback: just use any certificate chain
   * reported as valid. More sophisticated could prioritise according
   * to local policy.
   */
  static int set_cert_cb(SSL *ssl, void *arg)
  	{
  	int i, rv;
  	SSL_EXCERT *exc = arg;
  #ifdef CERT_CB_TEST_RETRY
  	static int retry_cnt;
  	if (retry_cnt < 5)
  		{
  		retry_cnt++;
  		fprintf(stderr, "Certificate callback retry test: count %d\n",
  								retry_cnt);
  		return -1;
  		}
  #endif
  	SSL_certs_clear(ssl);
  
  	if (!exc)
  		return 1;
  
  	/* Go to end of list and traverse backwards since we prepend
  	 * newer entries this retains the original order.
  	 */
  	while (exc->next)
  		exc = exc->next;
  
  	i = 0;	
  
  	while(exc)
  		{
  		i++;
  		rv = SSL_check_chain(ssl, exc->cert, exc->key, exc->chain);
  		BIO_printf(bio_err, "Checking cert chain %d:\nSubject: ", i);
  		X509_NAME_print_ex(bio_err, X509_get_subject_name(exc->cert), 0,
  							XN_FLAG_ONELINE);
  		BIO_puts(bio_err, "\n");
  		
  		print_chain_flags(bio_err, rv);
  		if (rv & CERT_PKEY_VALID)
  			{
  			SSL_use_certificate(ssl, exc->cert);
  			SSL_use_PrivateKey(ssl, exc->key);
  			/* NB: we wouldn't normally do this as it is
  			 * not efficient building chains on each connection
  			 * better to cache the chain in advance.
  			 */
  			if (exc->build_chain)
  				{
  				if (!SSL_build_cert_chain(ssl, 0))
  					return 0;
  				}
  			else if (exc->chain)
  				SSL_set1_chain(ssl, exc->chain);
  			}
  		exc = exc->prev;
  		}
  	return 1;
  	}
  
  void ssl_ctx_set_excert(SSL_CTX *ctx, SSL_EXCERT *exc)
  	{
  	SSL_CTX_set_cert_cb(ctx, set_cert_cb, exc);
  	}
  
  static int ssl_excert_prepend(SSL_EXCERT **pexc)
  	{
  	SSL_EXCERT *exc;
  	exc = OPENSSL_malloc(sizeof(SSL_EXCERT));
  	if (!exc)
  		return 0;
  	exc->certfile = NULL;
  	exc->keyfile = NULL;
  	exc->chainfile = NULL;
  	exc->cert = NULL;
  	exc->key = NULL;
  	exc->chain = NULL;
  	exc->prev = NULL;
  	exc->build_chain = 0;
  
  	exc->next = *pexc;
  	*pexc = exc;
  			
  	if (exc->next)
  		{
  		exc->certform = exc->next->certform;
  		exc->keyform = exc->next->keyform;
  		exc->next->prev = exc;
  		}
  	else
  		{
  		exc->certform = FORMAT_PEM;
  		exc->keyform = FORMAT_PEM;
  		}
  	return 1;
  
  	}
  
  void ssl_excert_free(SSL_EXCERT *exc)
  	{
  	SSL_EXCERT *curr;
  	while (exc)
  		{
  		if (exc->cert)
  			X509_free(exc->cert);
  		if (exc->key)
  			EVP_PKEY_free(exc->key);
  		if (exc->chain)
  			sk_X509_pop_free(exc->chain, X509_free);
  		curr = exc;
  		exc = exc->next;
  		OPENSSL_free(curr);
  		}
  	}
  
  int load_excert(SSL_EXCERT **pexc, BIO *err)
  	{
  	SSL_EXCERT *exc = *pexc;
  	if (!exc)
  		return 1;
  	/* If nothing in list, free and set to NULL */
  	if (!exc->certfile && !exc->next)
  		{
  		ssl_excert_free(exc);
  		*pexc = NULL;
  		return 1;
  		}
  	for(; exc; exc=exc->next)
  		{
  		if (!exc->certfile)
  			{
  			BIO_printf(err, "Missing filename\n");
  			return 0;
  			}
  		exc->cert = load_cert(err, exc->certfile, exc->certform,
  					NULL, NULL, "Server Certificate");
  		if (!exc->cert)
  			return 0;
  		if (exc->keyfile)
  			exc->keyfile = exc->certfile;
  		exc->key = load_key(err, exc->certfile, exc->certform, 0,
  					NULL, NULL, "Server Certificate");
  		if (!exc->key)
  			return 0;
  		if (exc->chainfile)
  			{
  			exc->chain = load_certs(err,
  						exc->chainfile, FORMAT_PEM,
  						NULL, NULL,
  						"Server Chain");
  			if (!exc->chainfile)
  				return 0;
  			}
  		}
  	return 1;
  	}
  		
  
  int args_excert(char ***pargs, int *pargc,
  			int *badarg, BIO *err, SSL_EXCERT **pexc)
  	{
  	char *arg = **pargs, *argn = (*pargs)[1];
  	SSL_EXCERT *exc = *pexc;
  	int narg = 2;
  	if (!exc)
  		{
  		if (ssl_excert_prepend(&exc))
  			*pexc = exc;
  		else
  			{
  			BIO_printf(err, "Error initialising xcert\n");
  			*badarg = 1;
  			goto err;
  			}
  		}
  	if (strcmp(arg, "-xcert") == 0)
  		{
  		if (!argn)
  			{
  			*badarg = 1;
  			return 1;
  			}
  		if (exc->certfile && !ssl_excert_prepend(&exc))
  			{
  			BIO_printf(err, "Error adding xcert\n");
  			*badarg = 1;
  			goto err;
  			}
  		exc->certfile = argn;
  		}
  	else if (strcmp(arg,"-xkey") == 0)
  		{
  		if (!argn)
  			{
  			*badarg = 1;
  			return 1;
  			}
  		if (exc->keyfile)
  			{
  			BIO_printf(err, "Key already specified\n");
  			*badarg = 1;
  			return 1;
  			}
  		exc->keyfile = argn;
  		}
  	else if (strcmp(arg,"-xchain") == 0)
  		{
  		if (!argn)
  			{
  			*badarg = 1;
  			return 1;
  			}
  		if (exc->chainfile)
  			{
  			BIO_printf(err, "Chain already specified\n");
  			*badarg = 1;
  			return 1;
  			}
  		exc->chainfile = argn;
  		}
  	else if (strcmp(arg,"-xchain_build") == 0)
  		{
  		narg = 1;
  		exc->build_chain = 1;
  		}
  	else if (strcmp(arg,"-xcertform") == 0)
  		{
  		if (!argn)
  			{
  			*badarg = 1;
  			goto err;
  			}
  		exc->certform = str2fmt(argn);
  		}
  	else if (strcmp(arg,"-xkeyform") == 0)
  		{
  		if (!argn)
  			{
  			*badarg = 1;
  			goto err;
  			}
  		exc->keyform = str2fmt(argn);
  		}
  	else
  		return 0;
  
  	(*pargs) += narg;
  
  	if (pargc)
  		*pargc -= narg;
  
  	*pexc = exc;
  
  	return 1;
  
  	err:
  	ERR_print_errors(err);
  	ssl_excert_free(exc);
  	*pexc = NULL;
  	return 1;
  	}
  
  static void print_raw_cipherlist(BIO *bio, SSL *s)
  	{
  	const unsigned char *rlist;
  	static const unsigned char scsv_id[] = {0, 0, 0xFF};
  	size_t i, rlistlen, num;
  	if (!SSL_is_server(s))
  		return;
  	num = SSL_get0_raw_cipherlist(s, NULL);
  	rlistlen = SSL_get0_raw_cipherlist(s, &rlist);
  	BIO_puts(bio, "Client cipher list: ");
  	for (i = 0; i < rlistlen; i += num, rlist += num)
  		{
  		const SSL_CIPHER *c = SSL_CIPHER_find(s, rlist);
  		if (i)
  			BIO_puts(bio, ":");
  		if (c)
  			BIO_puts(bio, SSL_CIPHER_get_name(c));
  		else if (!memcmp(rlist, scsv_id - num + 3, num))
  			BIO_puts(bio, "SCSV");
  		else
  			{
  			size_t j;
  			BIO_puts(bio, "0x");
  			for (j = 0; j < num; j++)
  				BIO_printf(bio, "%02X", rlist[j]);
  			}
  		}
  	BIO_puts(bio, "\n");
  	}
  	
  
  void print_ssl_summary(BIO *bio, SSL *s)
  	{
  	const SSL_CIPHER *c;
  	X509 *peer;
  	/*const char *pnam = SSL_is_server(s) ? "client" : "server";*/
  	BIO_printf(bio, "Protocol version: %s\n", SSL_get_version(s));
  	print_raw_cipherlist(bio, s);
  	c = SSL_get_current_cipher(s);
  	BIO_printf(bio,"Ciphersuite: %s\n", SSL_CIPHER_get_name(c));
  	do_print_sigalgs(bio, s, 0);
  	peer = SSL_get_peer_certificate(s);
  	if (peer)
  		{
  		int nid;
  		BIO_puts(bio, "Peer certificate: ");
  		X509_NAME_print_ex(bio, X509_get_subject_name(peer),
  					0, XN_FLAG_ONELINE);
  		BIO_puts(bio, "\n");
  		if (SSL_get_peer_signature_nid(s, &nid))
  			BIO_printf(bio, "Hash used: %s\n", OBJ_nid2sn(nid));
  		}
  	else
  		BIO_puts(bio, "No peer certificate\n");
  	if (peer)
  		X509_free(peer);
  #ifndef OPENSSL_NO_EC
  	ssl_print_point_formats(bio, s);
  	if (SSL_is_server(s))
  		ssl_print_curves(bio, s, 1);
  	else
  		ssl_print_tmp_key(bio, s);
  #else
  	if (!SSL_is_server(s))
  		ssl_print_tmp_key(bio, s);
  #endif
  	}
  
  int args_ssl(char ***pargs, int *pargc, SSL_CONF_CTX *cctx,
  			int *badarg, BIO *err, STACK_OF(OPENSSL_STRING) **pstr)
  	{
  	char *arg = **pargs, *argn = (*pargs)[1];
  	int rv;
  
  	/* Attempt to run SSL configuration command */
  	rv = SSL_CONF_cmd_argv(cctx, pargc, pargs);
  	/* If parameter not recognised just return */
  	if (rv == 0)
  		return 0;
  	/* see if missing argument error */
  	if (rv == -3)
  		{
  		BIO_printf(err, "%s needs an argument\n", arg);
  		*badarg = 1;
  		goto end;
  		}
  	/* Check for some other error */
  	if (rv < 0)
  		{
  		BIO_printf(err, "Error with command: \"%s %s\"\n",
  						arg, argn ? argn : "");
  		*badarg = 1;
  		goto end;
  		}
  	/* Store command and argument */
  	/* If only one argument processed store value as NULL */
  	if (rv == 1)
  		argn = NULL;
  	if (!*pstr)
  		*pstr = sk_OPENSSL_STRING_new_null();
  	if (!*pstr || !sk_OPENSSL_STRING_push(*pstr, arg) ||
  				!sk_OPENSSL_STRING_push(*pstr, argn))
  		{
  		BIO_puts(err, "Memory allocation failure\n");
  		goto end;
  		}
  
  	end:
  	if (*badarg)
  		ERR_print_errors(err);
  
  	return 1;
  	}
  
  int args_ssl_call(SSL_CTX *ctx, BIO *err, SSL_CONF_CTX *cctx,
  		STACK_OF(OPENSSL_STRING) *str, int no_ecdhe, int no_jpake)
  	{
  	int i;
  	SSL_CONF_CTX_set_ssl_ctx(cctx, ctx);
  	for (i = 0; i < sk_OPENSSL_STRING_num(str); i+= 2)
  		{
  		const char *param = sk_OPENSSL_STRING_value(str, i);
  		const char *value = sk_OPENSSL_STRING_value(str, i + 1);
  		/* If no_ecdhe or named curve already specified don't need
  		 * a default.
  		 */
  		if (!no_ecdhe && !strcmp(param, "-named_curve"))
  			no_ecdhe = 1;
  #ifndef OPENSSL_NO_JPAKE
  		if (!no_jpake && !strcmp(param, "-cipher"))
  			{
  			BIO_puts(err, "JPAKE sets cipher to PSK\n");
  			return 0;
  			}
  #endif
  		if (SSL_CONF_cmd(cctx, param, value) <= 0)
  			{
  			BIO_printf(err, "Error with command: \"%s %s\"\n",
  						param, value ? value : "");
  			ERR_print_errors(err);
  			return 0;
  			}
  		}
  	/* This is a special case to keep existing s_server functionality:
  	 * if we don't have any curve specified *and* we haven't disabled
  	 * ECDHE then use P-256.
  	 */
  	if (!no_ecdhe)
  		{
  		if (SSL_CONF_cmd(cctx, "-named_curve", "P-256") <= 0)
  			{
  			BIO_puts(err, "Error setting EC curve\n");
  			ERR_print_errors(err);
  			return 0;
  			}
  		}
  #ifndef OPENSSL_NO_JPAKE
  	if (!no_jpake)
  		{
  		if (SSL_CONF_cmd(cctx, "-cipher", "PSK") <= 0)
  			{
  			BIO_puts(err, "Error setting cipher to PSK\n");
  			ERR_print_errors(err);
  			return 0;
  			}
  		}
  #endif
  	if (!SSL_CONF_CTX_finish(cctx))
  		{
  		BIO_puts(err, "Error finishing context\n");
  		ERR_print_errors(err);
  		return 0;
  		}
  	return 1;
  	}
  
  static int add_crls_store(X509_STORE *st, STACK_OF(X509_CRL) *crls)
  	{
  	X509_CRL *crl;
  	int i;
  	for (i = 0; i < sk_X509_CRL_num(crls); i++)
  		{
  		crl = sk_X509_CRL_value(crls, i);
  		X509_STORE_add_crl(st, crl);
  		}
  	return 1;
  	}
  
  int ssl_ctx_add_crls(SSL_CTX *ctx, STACK_OF(X509_CRL) *crls, int crl_download)
  	{
  	X509_STORE *st;
  	st = SSL_CTX_get_cert_store(ctx);
  	add_crls_store(st, crls);
  	if (crl_download)
  		store_setup_crl_download(st);
  	return 1;
  	}
  
  int ssl_load_stores(SSL_CTX *ctx,
  			const char *vfyCApath, const char *vfyCAfile,
  			const char *chCApath, const char *chCAfile,
  			STACK_OF(X509_CRL) *crls, int crl_download)
  	{
  	X509_STORE *vfy = NULL, *ch = NULL;
  	int rv = 0;
  	if (vfyCApath || vfyCAfile)
  		{
  		vfy = X509_STORE_new();
  		if (!X509_STORE_load_locations(vfy, vfyCAfile, vfyCApath))
  			goto err;
  		add_crls_store(vfy, crls);
  		SSL_CTX_set1_verify_cert_store(ctx, vfy);
  		if (crl_download)
  			store_setup_crl_download(vfy);
  		}
  	if (chCApath || chCAfile)
  		{
  		ch = X509_STORE_new();
  		if (!X509_STORE_load_locations(ch, chCAfile, chCApath))
  			goto err;
  		SSL_CTX_set1_chain_cert_store(ctx, ch);
  		}
  	rv = 1;
  	err:
  	if (vfy)
  		X509_STORE_free(vfy);
  	if (ch)
  		X509_STORE_free(ch);
  	return rv;
  	}
  