s_server.c

/* apps/s_server.c */
/* 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 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
 * ECC cipher suite support in OpenSSL originally developed by 
 * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
 */
/* ====================================================================
 * 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.
 */

/* Until the key-gen callbacks are modified to use newer prototypes, we allow
 * deprecated functions for openssl-internal code */
#ifdef OPENSSL_NO_DEPRECATED
#undef OPENSSL_NO_DEPRECATED
#endif

#include <assert.h>
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <openssl/e_os2.h>
#ifdef OPENSSL_NO_STDIO
#define APPS_WIN16
#endif

#if !defined(OPENSSL_SYS_NETWARE)  /* conflicts with winsock2 stuff on netware */
#include <sys/types.h>
#endif

/* With IPv6, it looks like Digital has mixed up the proper order of
   recursive header file inclusion, resulting in the compiler complaining
   that u_int isn't defined, but only if _POSIX_C_SOURCE is defined, which
   is needed to have fileno() declared correctly...  So let's define u_int */
#if defined(OPENSSL_SYS_VMS_DECC) && !defined(__U_INT)
#define __U_INT
typedef unsigned int u_int;
#endif

#include <openssl/lhash.h>
#include <openssl/bn.h>
#define USE_SOCKETS
#include "apps.h"
#include <openssl/err.h>
#include <openssl/pem.h>
#include <openssl/x509.h>
#include <openssl/ssl.h>
#include <openssl/rand.h>
#ifndef OPENSSL_NO_DH
#include <openssl/dh.h>
#endif
#ifndef OPENSSL_NO_RSA
#include <openssl/rsa.h>
#endif
#include "s_apps.h"
#include "timeouts.h"

#if (defined(OPENSSL_SYS_VMS) && __VMS_VER < 70000000)
/* FIONBIO used as a switch to enable ioctl, and that isn't in VMS < 7.0 */
#undef FIONBIO
#endif

#ifndef OPENSSL_NO_RSA
static RSA MS_CALLBACK *tmp_rsa_cb(SSL *s, int is_export, int keylength);
#endif
static int sv_body(char *hostname, int s, unsigned char *context);
static int www_body(char *hostname, int s, unsigned char *context);
static void close_accept_socket(void );
static void sv_usage(void);
static int init_ssl_connection(SSL *s);
static void print_stats(BIO *bp,SSL_CTX *ctx);
static int generate_session_id(const SSL *ssl, unsigned char *id,
				unsigned int *id_len);
#ifndef OPENSSL_NO_DH
static DH *load_dh_param(const char *dhfile);
static DH *get_dh512(void);
#endif

#ifdef MONOLITH
static void s_server_init(void);
#endif

#ifndef OPENSSL_NO_DH
static unsigned char dh512_p[]={
	0xDA,0x58,0x3C,0x16,0xD9,0x85,0x22,0x89,0xD0,0xE4,0xAF,0x75,
	0x6F,0x4C,0xCA,0x92,0xDD,0x4B,0xE5,0x33,0xB8,0x04,0xFB,0x0F,
	0xED,0x94,0xEF,0x9C,0x8A,0x44,0x03,0xED,0x57,0x46,0x50,0xD3,
	0x69,0x99,0xDB,0x29,0xD7,0x76,0x27,0x6B,0xA2,0xD3,0xD4,0x12,
	0xE2,0x18,0xF4,0xDD,0x1E,0x08,0x4C,0xF6,0xD8,0x00,0x3E,0x7C,
	0x47,0x74,0xE8,0x33,
	};
static unsigned char dh512_g[]={
	0x02,
	};

static DH *get_dh512(void)
	{
	DH *dh=NULL;

	if ((dh=DH_new()) == NULL) return(NULL);
	dh->p=BN_bin2bn(dh512_p,sizeof(dh512_p),NULL);
	dh->g=BN_bin2bn(dh512_g,sizeof(dh512_g),NULL);
	if ((dh->p == NULL) || (dh->g == NULL))
		return(NULL);
	return(dh);
	}
#endif


/* static int load_CA(SSL_CTX *ctx, char *file);*/

#undef BUFSIZZ
#define BUFSIZZ	16*1024
static int bufsize=BUFSIZZ;
static int accept_socket= -1;

#define TEST_CERT	"server.pem"
#ifndef OPENSSL_NO_TLSEXT
#define TEST_CERT2	"server2.pem"
#endif
#undef PROG
#define PROG		s_server_main

extern int verify_depth;

static char *cipher=NULL;
static int s_server_verify=SSL_VERIFY_NONE;
static int s_server_session_id_context = 1; /* anything will do */
static const char *s_cert_file=TEST_CERT,*s_key_file=NULL;
#ifndef OPENSSL_NO_TLSEXT
static const char *s_cert_file2=TEST_CERT2,*s_key_file2=NULL;
#endif
static char *s_dcert_file=NULL,*s_dkey_file=NULL;
#ifdef FIONBIO
static int s_nbio=0;
#endif
static int s_nbio_test=0;
int s_crlf=0;
static SSL_CTX *ctx=NULL;
#ifndef OPENSSL_NO_TLSEXT
static SSL_CTX *ctx2=NULL;
#endif
static int www=0;

static BIO *bio_s_out=NULL;
static int s_debug=0;
static int s_msg=0;
static int s_quiet=0;

static int hack=0;
#ifndef OPENSSL_NO_ENGINE
static char *engine_id=NULL;
#endif
static const char *session_id_prefix=NULL;

static int enable_timeouts = 0;
static long socket_mtu;
static int cert_chain = 0;

#ifndef OPENSSL_NO_PSK
static char *psk_identity="Client_identity";
static char *psk_key=NULL; /* by default PSK is not used */

static unsigned int psk_server_cb(SSL *ssl, const char *identity,
	unsigned char *psk, unsigned int max_psk_len)
	{
	unsigned int psk_len = 0;
	int ret;
	BIGNUM *bn = NULL;

	if (s_debug)
		BIO_printf(bio_s_out,"psk_server_cb\n");
	if (!identity)
		{
		BIO_printf(bio_err,"Error: client did not send PSK identity\n");
		goto out_err;
		}
	if (s_debug)
		BIO_printf(bio_s_out,"identity_len=%d identity=%s\n",
			identity ? strlen(identity) : 0, identity);

	/* here we could lookup the given identity e.g. from a database */
  	if (strcmp(identity, psk_identity) != 0)
		{
                BIO_printf(bio_s_out, "PSK error: client identity not found\n");
		goto out_err;
                }
	if (s_debug)
		BIO_printf(bio_s_out, "PSK client identity found\n");

	/* convert the PSK key to binary */
	ret = BN_hex2bn(&bn, psk_key);
	if (!ret)
		{
		BIO_printf(bio_err,"Could not convert PSK key '%s' to BIGNUM\n", psk_key);
		if (bn)
			BN_free(bn);
		return 0;
		}
	if (BN_num_bytes(bn) > (int)max_psk_len)
		{
		BIO_printf(bio_err,"psk buffer of callback is too small (%d) for key (%d)\n",
			max_psk_len, BN_num_bytes(bn));
		BN_free(bn);
		return 0;
		}

	ret = BN_bn2bin(bn, psk);
	BN_free(bn);

	if (ret < 0)
		goto out_err;
	psk_len = (unsigned int)ret;

	if (s_debug)
		BIO_printf(bio_s_out, "fetched PSK len=%d\n", psk_len);
        return psk_len;
 out_err:
	if (s_debug)
		BIO_printf(bio_err, "Error in PSK server callback\n");
	return 0;
        }
#endif

#ifdef MONOLITH
static void s_server_init(void)
	{
	accept_socket=-1;
	cipher=NULL;
	s_server_verify=SSL_VERIFY_NONE;
	s_dcert_file=NULL;
	s_dkey_file=NULL;
	s_cert_file=TEST_CERT;
	s_key_file=NULL;
#ifndef OPENSSL_NO_TLSEXT
	s_cert_file2=TEST_CERT2;
	s_key_file2=NULL;
	ctx2=NULL;
#endif
#ifdef FIONBIO
	s_nbio=0;
#endif
	s_nbio_test=0;
	ctx=NULL;
	www=0;

	bio_s_out=NULL;
	s_debug=0;
	s_msg=0;
	s_quiet=0;
	hack=0;
#ifndef OPENSSL_NO_ENGINE
	engine_id=NULL;
#endif
	}
#endif

static void sv_usage(void)
	{
	BIO_printf(bio_err,"usage: s_server [args ...]\n");
	BIO_printf(bio_err,"\n");
	BIO_printf(bio_err," -accept arg   - port to accept on (default is %d)\n",PORT);
	BIO_printf(bio_err," -context arg  - set session ID context\n");
	BIO_printf(bio_err," -verify arg   - turn on peer certificate verification\n");
	BIO_printf(bio_err," -Verify arg   - turn on peer certificate verification, must have a cert.\n");
	BIO_printf(bio_err," -cert arg     - certificate file to use\n");
	BIO_printf(bio_err,"                 (default is %s)\n",TEST_CERT);
	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 (default is %s)\n",TEST_CERT);
	BIO_printf(bio_err," -keyform arg  - key format (PEM, DER or ENGINE) PEM default\n");
	BIO_printf(bio_err," -pass arg     - private key file pass phrase source\n");
	BIO_printf(bio_err," -dcert arg    - second certificate file to use (usually for DSA)\n");
	BIO_printf(bio_err," -dcertform x  - second certificate format (PEM or DER) PEM default\n");
	BIO_printf(bio_err," -dkey arg     - second private key file to use (usually for DSA)\n");
	BIO_printf(bio_err," -dkeyform arg - second key format (PEM, DER or ENGINE) PEM default\n");
	BIO_printf(bio_err," -dpass arg    - second private key file pass phrase source\n");
	BIO_printf(bio_err," -dhparam arg  - DH parameter file to use, in cert file if not specified\n");
	BIO_printf(bio_err,"                 or a default set of parameters is used\n");
#ifndef OPENSSL_NO_ECDH
	BIO_printf(bio_err," -named_curve arg  - Elliptic curve name to use for ephemeral ECDH keys.\n" \
	                   "                 Use \"openssl ecparam -list_curves\" for all names\n" \
	                   "                 (default is nistp256).\n");
#endif
#ifdef FIONBIO
	BIO_printf(bio_err," -nbio         - Run with non-blocking IO\n");
#endif
	BIO_printf(bio_err," -nbio_test    - test with the non-blocking test bio\n");
	BIO_printf(bio_err," -crlf         - convert LF from terminal into CRLF\n");
	BIO_printf(bio_err," -debug        - Print more output\n");
	BIO_printf(bio_err," -msg          - Show protocol messages\n");
	BIO_printf(bio_err," -state        - Print the SSL states\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," -nocert       - Don't use any certificates (Anon-DH)\n");
	BIO_printf(bio_err," -cipher arg   - play with 'openssl ciphers' to see what goes here\n");
	BIO_printf(bio_err," -serverpref   - Use server's cipher preferences\n");
	BIO_printf(bio_err," -quiet        - No server output\n");
	BIO_printf(bio_err," -no_tmp_rsa   - Do not generate a tmp RSA key\n");
#ifndef OPENSSL_NO_PSK
	BIO_printf(bio_err," -psk_hint arg - PSK identity hint to use\n");
	BIO_printf(bio_err," -psk arg      - PSK in hex (without 0x)\n");
#endif
	BIO_printf(bio_err," -ssl2         - Just talk SSLv2\n");
	BIO_printf(bio_err," -ssl3         - Just talk SSLv3\n");
	BIO_printf(bio_err," -tls1         - Just talk TLSv1\n");
	BIO_printf(bio_err," -dtls1        - Just talk DTLSv1\n");
	BIO_printf(bio_err," -timeout      - Enable timeouts\n");
	BIO_printf(bio_err," -mtu          - Set MTU\n");
	BIO_printf(bio_err," -chain        - Read a certificate chain\n");
	BIO_printf(bio_err," -no_ssl2      - Just disable SSLv2\n");
	BIO_printf(bio_err," -no_ssl3      - Just disable SSLv3\n");
	BIO_printf(bio_err," -no_tls1      - Just disable TLSv1\n");
#ifndef OPENSSL_NO_DH
	BIO_printf(bio_err," -no_dhe       - Disable ephemeral DH\n");
#endif
#ifndef OPENSSL_NO_ECDH
	BIO_printf(bio_err," -no_ecdhe     - Disable ephemeral ECDH\n");
#endif
	BIO_printf(bio_err," -bugs         - Turn on SSL bug compatibility\n");
	BIO_printf(bio_err," -www          - Respond to a 'GET /' with a status page\n");
	BIO_printf(bio_err," -WWW          - Respond to a 'GET /<path> HTTP/1.0' with file ./<path>\n");
	BIO_printf(bio_err," -HTTP         - Respond to a 'GET /<path> HTTP/1.0' with file ./<path>\n");
        BIO_printf(bio_err,"                 with the assumption it contains a complete HTTP response.\n");
#ifndef OPENSSL_NO_ENGINE
	BIO_printf(bio_err," -engine id    - Initialise and use the specified engine\n");
#endif
	BIO_printf(bio_err," -id_prefix arg - Generate SSL/TLS session IDs prefixed by 'arg'\n");
	BIO_printf(bio_err," -rand file%cfile%c...\n", LIST_SEPARATOR_CHAR, LIST_SEPARATOR_CHAR);
#ifndef OPENSSL_NO_TLSEXT
	BIO_printf(bio_err," -servername host - servername for HostName TLS extension\n");
	BIO_printf(bio_err," -servername_fatal - on mismatch send fatal alert (default warning alert)\n");
	BIO_printf(bio_err," -cert2 arg    - certificate file to use for servername\n");
	BIO_printf(bio_err,"                 (default is %s)\n",TEST_CERT2);
	BIO_printf(bio_err," -key2 arg     - Private Key file to use for servername, in cert file if\n");
	BIO_printf(bio_err,"                 not specified (default is %s)\n",TEST_CERT2);
#endif
	}

static int local_argc=0;
static char **local_argv;

#ifdef CHARSET_EBCDIC
static int ebcdic_new(BIO *bi);
static int ebcdic_free(BIO *a);
static int ebcdic_read(BIO *b, char *out, int outl);
static int ebcdic_write(BIO *b, const char *in, int inl);
static long ebcdic_ctrl(BIO *b, int cmd, long num, void *ptr);
static int ebcdic_gets(BIO *bp, char *buf, int size);
static int ebcdic_puts(BIO *bp, const char *str);

#define BIO_TYPE_EBCDIC_FILTER	(18|0x0200)
static BIO_METHOD methods_ebcdic=
	{
	BIO_TYPE_EBCDIC_FILTER,
	"EBCDIC/ASCII filter",
	ebcdic_write,
	ebcdic_read,
	ebcdic_puts,
	ebcdic_gets,
	ebcdic_ctrl,
	ebcdic_new,
	ebcdic_free,
	};

typedef struct
{
	size_t	alloced;
	char	buff[1];
} EBCDIC_OUTBUFF;

BIO_METHOD *BIO_f_ebcdic_filter()
{
	return(&methods_ebcdic);
}

static int ebcdic_new(BIO *bi)
{
	EBCDIC_OUTBUFF *wbuf;

	wbuf = (EBCDIC_OUTBUFF *)OPENSSL_malloc(sizeof(EBCDIC_OUTBUFF) + 1024);
	wbuf->alloced = 1024;
	wbuf->buff[0] = '\0';

	bi->ptr=(char *)wbuf;
	bi->init=1;
	bi->flags=0;
	return(1);
}

static int ebcdic_free(BIO *a)
{
	if (a == NULL) return(0);
	if (a->ptr != NULL)
		OPENSSL_free(a->ptr);
	a->ptr=NULL;
	a->init=0;
	a->flags=0;
	return(1);
}
	
static int ebcdic_read(BIO *b, char *out, int outl)
{
	int ret=0;

	if (out == NULL || outl == 0) return(0);
	if (b->next_bio == NULL) return(0);

	ret=BIO_read(b->next_bio,out,outl);
	if (ret > 0)
		ascii2ebcdic(out,out,ret);
	return(ret);
}

static int ebcdic_write(BIO *b, const char *in, int inl)
{
	EBCDIC_OUTBUFF *wbuf;
	int ret=0;
	int num;
	unsigned char n;

	if ((in == NULL) || (inl <= 0)) return(0);
	if (b->next_bio == NULL) return(0);

	wbuf=(EBCDIC_OUTBUFF *)b->ptr;

	if (inl > (num = wbuf->alloced))
	{
		num = num + num;  /* double the size */
		if (num < inl)
			num = inl;
		OPENSSL_free(wbuf);
		wbuf=(EBCDIC_OUTBUFF *)OPENSSL_malloc(sizeof(EBCDIC_OUTBUFF) + num);

		wbuf->alloced = num;
		wbuf->buff[0] = '\0';

		b->ptr=(char *)wbuf;
	}

	ebcdic2ascii(wbuf->buff, in, inl);

	ret=BIO_write(b->next_bio, wbuf->buff, inl);

	return(ret);
}

static long ebcdic_ctrl(BIO *b, int cmd, long num, void *ptr)
{
	long ret;

	if (b->next_bio == NULL) return(0);
	switch (cmd)
	{
	case BIO_CTRL_DUP:
		ret=0L;
		break;
	default:
		ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
		break;
	}
	return(ret);
}

static int ebcdic_gets(BIO *bp, char *buf, int size)
{
	int i, ret=0;
	if (bp->next_bio == NULL) return(0);
/*	return(BIO_gets(bp->next_bio,buf,size));*/
	for (i=0; i<size-1; ++i)
	{
		ret = ebcdic_read(bp,&buf[i],1);
		if (ret <= 0)
			break;
		else if (buf[i] == '\n')
		{
			++i;
			break;
		}
	}
	if (i < size)
		buf[i] = '\0';
	return (ret < 0 && i == 0) ? ret : i;
}

static int ebcdic_puts(BIO *bp, const char *str)
{
	if (bp->next_bio == NULL) return(0);
	return ebcdic_write(bp, str, strlen(str));
}
#endif

#ifndef OPENSSL_NO_TLSEXT

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


static int MS_CALLBACK ssl_servername_cb(SSL *s, int *ad, void *arg)
	{
	tlsextctx * p = (tlsextctx *) arg;
	const char * servername = SSL_get_servername(s, TLSEXT_NAMETYPE_host_name);
        if (servername && p->biodebug) 
		BIO_printf(p->biodebug,"Hostname in TLS extension: \"%s\"\n",servername);
        
	if (!p->servername)
		return SSL_TLSEXT_ERR_NOACK;
	
	if (servername)
		{
    		if (strcmp(servername,p->servername)) 
			return p->extension_error;
		if (ctx2)
			{
			BIO_printf(p->biodebug,"Swiching server context.\n");
			SSL_set_SSL_CTX(s,ctx2);
			}     
		}
	return SSL_TLSEXT_ERR_OK;
}
#endif

int MAIN(int, char **);

int MAIN(int argc, char *argv[])
	{
	X509_STORE *store = NULL;
	int vflags = 0;
	short port=PORT;
	char *CApath=NULL,*CAfile=NULL;
	unsigned char *context = NULL;
	char *dhfile = NULL;
#ifndef OPENSSL_NO_ECDH
	char *named_curve = NULL;
#endif
	int badop=0,bugs=0;
	int ret=1;
	int off=0;
	int no_tmp_rsa=0,no_dhe=0,no_ecdhe=0,nocert=0;
	int state=0;
	const SSL_METHOD *meth=NULL;
	int socket_type=SOCK_STREAM;
#ifndef OPENSSL_NO_ENGINE
	ENGINE *e=NULL;
#endif
	char *inrand=NULL;
	int s_cert_format = FORMAT_PEM, s_key_format = FORMAT_PEM;
	char *passarg = NULL, *pass = NULL;
	char *dpassarg = NULL, *dpass = NULL;
	int s_dcert_format = FORMAT_PEM, s_dkey_format = FORMAT_PEM;
	X509 *s_cert = NULL, *s_dcert = NULL;
	EVP_PKEY *s_key = NULL, *s_dkey = NULL;
#ifndef OPENSSL_NO_TLSEXT
	EVP_PKEY *s_key2 = NULL;
	X509 *s_cert2 = NULL;
#endif

#ifndef OPENSSL_NO_TLSEXT
        tlsextctx tlsextcbp = {NULL, NULL, SSL_TLSEXT_ERR_ALERT_WARNING};
#endif
#ifndef OPENSSL_NO_PSK
	/* by default do not send a PSK identity hint */
	static char *psk_identity_hint=NULL;
#endif
#if !defined(OPENSSL_NO_SSL2) && !defined(OPENSSL_NO_SSL3)
	meth=SSLv23_server_method();
#elif !defined(OPENSSL_NO_SSL3)
	meth=SSLv3_server_method();
#elif !defined(OPENSSL_NO_SSL2)
	meth=SSLv2_server_method();
#endif

	local_argc=argc;
	local_argv=argv;

	apps_startup();
#ifdef MONOLITH
	s_server_init();
#endif

	if (bio_err == NULL)
		bio_err=BIO_new_fp(stderr,BIO_NOCLOSE);

	if (!load_config(bio_err, NULL))
		goto end;

	verify_depth=0;
#ifdef FIONBIO
	s_nbio=0;
#endif
	s_nbio_test=0;

	argc--;
	argv++;

	while (argc >= 1)
		{
		if	((strcmp(*argv,"-port") == 0) ||
			 (strcmp(*argv,"-accept") == 0))
			{
			if (--argc < 1) goto bad;
			if (!extract_port(*(++argv),&port))
				goto bad;
			}
		else if	(strcmp(*argv,"-verify") == 0)
			{
			s_server_verify=SSL_VERIFY_PEER|SSL_VERIFY_CLIENT_ONCE;
			if (--argc < 1) goto bad;
			verify_depth=atoi(*(++argv));
			BIO_printf(bio_err,"verify depth is %d\n",verify_depth);
			}
		else if	(strcmp(*argv,"-Verify") == 0)
			{
			s_server_verify=SSL_VERIFY_PEER|SSL_VERIFY_FAIL_IF_NO_PEER_CERT|
				SSL_VERIFY_CLIENT_ONCE;
			if (--argc < 1) goto bad;
			verify_depth=atoi(*(++argv));
			BIO_printf(bio_err,"verify depth is %d, must return a certificate\n",verify_depth);
			}
		else if	(strcmp(*argv,"-context") == 0)
			{
			if (--argc < 1) goto bad;
			context= (unsigned char *)*(++argv);
			}
		else if	(strcmp(*argv,"-cert") == 0)
			{
			if (--argc < 1) goto bad;
			s_cert_file= *(++argv);
			}
		else if	(strcmp(*argv,"-certform") == 0)
			{
			if (--argc < 1) goto bad;
			s_cert_format = str2fmt(*(++argv));
			}
		else if	(strcmp(*argv,"-key") == 0)
			{
			if (--argc < 1) goto bad;
			s_key_file= *(++argv);
			}
		else if	(strcmp(*argv,"-keyform") == 0)
			{
			if (--argc < 1) goto bad;
			s_key_format = str2fmt(*(++argv));
			}
		else if	(strcmp(*argv,"-pass") == 0)
			{
			if (--argc < 1) goto bad;
			passarg = *(++argv);
			}
		else if	(strcmp(*argv,"-dhparam") == 0)
			{
			if (--argc < 1) goto bad;
			dhfile = *(++argv);
			}
#ifndef OPENSSL_NO_ECDH		
		else if	(strcmp(*argv,"-named_curve") == 0)
			{
			if (--argc < 1) goto bad;
			named_curve = *(++argv);
			}
#endif
		else if	(strcmp(*argv,"-dcertform") == 0)
			{
			if (--argc < 1) goto bad;
			s_dcert_format = str2fmt(*(++argv));
			}
		else if	(strcmp(*argv,"-dcert") == 0)
			{
			if (--argc < 1) goto bad;
			s_dcert_file= *(++argv);
			}
		else if	(strcmp(*argv,"-dkeyform") == 0)
			{
			if (--argc < 1) goto bad;
			s_dkey_format = str2fmt(*(++argv));
			}
		else if	(strcmp(*argv,"-dpass") == 0)
			{
			if (--argc < 1) goto bad;
			dpassarg = *(++argv);
			}
		else if	(strcmp(*argv,"-dkey") == 0)
			{
			if (--argc < 1) goto bad;
			s_dkey_file= *(++argv);
			}
		else if (strcmp(*argv,"-nocert") == 0)
			{
			nocert=1;
			}
		else if	(strcmp(*argv,"-CApath") == 0)
			{
			if (--argc < 1) goto bad;
			CApath= *(++argv);
			}
		else if (strcmp(*argv,"-crl_check") == 0)
			{
			vflags |= X509_V_FLAG_CRL_CHECK;
			}
		else if (strcmp(*argv,"-crl_check") == 0)
			{
			vflags |= X509_V_FLAG_CRL_CHECK|X509_V_FLAG_CRL_CHECK_ALL;
			}
		else if	(strcmp(*argv,"-serverpref") == 0)
			{ off|=SSL_OP_CIPHER_SERVER_PREFERENCE; }
		else if	(strcmp(*argv,"-cipher") == 0)
			{
			if (--argc < 1) goto bad;
			cipher= *(++argv);
			}
		else if	(strcmp(*argv,"-CAfile") == 0)
			{
			if (--argc < 1) goto bad;
			CAfile= *(++argv);
			}
#ifdef FIONBIO	
		else if	(strcmp(*argv,"-nbio") == 0)
			{ s_nbio=1; }
#endif
		else if	(strcmp(*argv,"-nbio_test") == 0)
			{
#ifdef FIONBIO	
			s_nbio=1;
#endif
			s_nbio_test=1;
			}
		else if	(strcmp(*argv,"-debug") == 0)
			{ s_debug=1; }
		else if	(strcmp(*argv,"-msg") == 0)
			{ s_msg=1; }
		else if	(strcmp(*argv,"-hack") == 0)
			{ hack=1; }
		else if	(strcmp(*argv,"-state") == 0)
			{ state=1; }
		else if	(strcmp(*argv,"-crlf") == 0)
			{ s_crlf=1; }
		else if	(strcmp(*argv,"-quiet") == 0)
			{ s_quiet=1; }
		else if	(strcmp(*argv,"-bugs") == 0)
			{ bugs=1; }
		else if	(strcmp(*argv,"-no_tmp_rsa") == 0)
			{ no_tmp_rsa=1; }
		else if	(strcmp(*argv,"-no_dhe") == 0)
			{ no_dhe=1; }
		else if	(strcmp(*argv,"-no_ecdhe") == 0)
			{ no_ecdhe=1; }
#ifndef OPENSSL_NO_PSK
                else if (strcmp(*argv,"-psk_hint") == 0)
			{
                        if (--argc < 1) goto bad;
                        psk_identity_hint= *(++argv);
                        }
                else if (strcmp(*argv,"-psk") == 0)
			{
			size_t i;

			if (--argc < 1) goto bad;
			psk_key=*(++argv);
			for (i=0; i<strlen(psk_key); i++)
				{
				if (isxdigit((int)psk_key[i]))
					continue;
				BIO_printf(bio_err,"Not a hex number '%s'\n",*argv);
				goto bad;
				}
			}
#endif
		else if	(strcmp(*argv,"-www") == 0)
			{ www=1; }
		else if	(strcmp(*argv,"-WWW") == 0)
			{ www=2; }
		else if	(strcmp(*argv,"-HTTP") == 0)
			{ www=3; }
		else if	(strcmp(*argv,"-no_ssl2") == 0)
			{ off|=SSL_OP_NO_SSLv2; }
		else if	(strcmp(*argv,"-no_ssl3") == 0)
			{ off|=SSL_OP_NO_SSLv3; }
		else if	(strcmp(*argv,"-no_tls1") == 0)
			{ off|=SSL_OP_NO_TLSv1; }
		else if	(strcmp(*argv,"-no_comp") == 0)
			{ off|=SSL_OP_NO_COMPRESSION; }
#ifndef OPENSSL_NO_SSL2
		else if	(strcmp(*argv,"-ssl2") == 0)
			{ meth=SSLv2_server_method(); }
#endif
#ifndef OPENSSL_NO_SSL3
		else if	(strcmp(*argv,"-ssl3") == 0)
			{ meth=SSLv3_server_method(); }
#endif
#ifndef OPENSSL_NO_TLS1
		else if	(strcmp(*argv,"-tls1") == 0)
			{ meth=TLSv1_server_method(); }
#endif
#ifndef OPENSSL_NO_DTLS1
		else if	(strcmp(*argv,"-dtls1") == 0)
			{ 
			meth=DTLSv1_server_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 = atol(*(++argv));
			}
		else if (strcmp(*argv, "-chain") == 0)
			cert_chain = 1;
#endif
		else if (strcmp(*argv, "-id_prefix") == 0)
			{
			if (--argc < 1) goto bad;
			session_id_prefix = *(++argv);
			}
#ifndef OPENSSL_NO_ENGINE
		else if (strcmp(*argv,"-engine") == 0)
			{
			if (--argc < 1) goto bad;
			engine_id= *(++argv);
			}
#endif
		else if (strcmp(*argv,"-rand") == 0)
			{
			if (--argc < 1) goto bad;
			inrand= *(++argv);
			}
#ifndef OPENSSL_NO_TLSEXT
		else if (strcmp(*argv,"-servername") == 0)
			{
			if (--argc < 1) goto bad;
			tlsextcbp.servername= *(++argv);
			}
		else if (strcmp(*argv,"-servername_fatal") == 0)
			{ tlsextcbp.extension_error = SSL_TLSEXT_ERR_ALERT_FATAL; }
		else if	(strcmp(*argv,"-cert2") == 0)
			{
			if (--argc < 1) goto bad;
			s_cert_file2= *(++argv);
			}
		else if	(strcmp(*argv,"-key2") == 0)
			{
			if (--argc < 1) goto bad;
			s_key_file2= *(++argv);
			}
#endif
		else
			{
			BIO_printf(bio_err,"unknown option %s\n",*argv);
			badop=1;
			break;
			}
		argc--;
		argv++;
		}
	if (badop)
		{
bad:
		sv_usage();
		goto end;
		}

	SSL_load_error_strings();
	OpenSSL_add_ssl_algorithms();