ssl/s2_lib.c - platform/external/openssl.git - Git at Google

 /* ssl/s2_lib.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) 1998-2007 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 "ssl_locl.h"
 #ifndef OPENSSL_NO_SSL2
 #include <stdio.h>
 #include <openssl/objects.h>
 #include <openssl/evp.h>
 #include <openssl/md5.h>

 const char ssl2_version_str[]="SSLv2" OPENSSL_VERSION_PTEXT;

 #define SSL2_NUM_CIPHERS (sizeof(ssl2_ciphers)/sizeof(SSL_CIPHER))

 /* list of available SSLv2 ciphers (sorted by id) */
 OPENSSL_GLOBAL const SSL_CIPHER ssl2_ciphers[]={
 #if 0
 /* NULL_WITH_MD5 v3 */
 	{
 	1,
 	SSL2_TXT_NULL_WITH_MD5,
 	SSL2_CK_NULL_WITH_MD5,
 	SSL_kRSA,
 	SSL_aRSA,
 	SSL_eNULL,
 	SSL_MD5,
 	SSL_SSLV2,
 	SSL_EXPORT|SSL_EXP40|SSL_STRONG_NONE,
 	0,
 	0,
 	0,
 	},
 #endif

 /* RC4_128_WITH_MD5 */
 	{
 	1,
 	SSL2_TXT_RC4_128_WITH_MD5,
 	SSL2_CK_RC4_128_WITH_MD5,
 	SSL_kRSA,
 	SSL_aRSA,
 	SSL_RC4,
 	SSL_MD5,
 	SSL_SSLV2,
 	SSL_NOT_EXP|SSL_MEDIUM,
 	0,
 	128,
 	128,
 	},

 /* RC4_128_EXPORT40_WITH_MD5 */
 	{
 	1,
 	SSL2_TXT_RC4_128_EXPORT40_WITH_MD5,
 	SSL2_CK_RC4_128_EXPORT40_WITH_MD5,
 	SSL_kRSA,
 	SSL_aRSA,
 	SSL_RC4,
 	SSL_MD5,
 	SSL_SSLV2,
 	SSL_EXPORT|SSL_EXP40,
 	SSL2_CF_5_BYTE_ENC,
 	40,
 	128,
 	},

 /* RC2_128_CBC_WITH_MD5 */
 	{
 	1,
 	SSL2_TXT_RC2_128_CBC_WITH_MD5,
 	SSL2_CK_RC2_128_CBC_WITH_MD5,
 	SSL_kRSA,
 	SSL_aRSA,
 	SSL_RC2,
 	SSL_MD5,
 	SSL_SSLV2,
 	SSL_NOT_EXP|SSL_MEDIUM,
 	0,
 	128,
 	128,
 	},

 /* RC2_128_CBC_EXPORT40_WITH_MD5 */
 	{
 	1,
 	SSL2_TXT_RC2_128_CBC_EXPORT40_WITH_MD5,
 	SSL2_CK_RC2_128_CBC_EXPORT40_WITH_MD5,
 	SSL_kRSA,
 	SSL_aRSA,
 	SSL_RC2,
 	SSL_MD5,
 	SSL_SSLV2,
 	SSL_EXPORT|SSL_EXP40,
 	SSL2_CF_5_BYTE_ENC,
 	40,
 	128,
 	},

 #ifndef OPENSSL_NO_IDEA
 /* IDEA_128_CBC_WITH_MD5 */
 	{
 	1,
 	SSL2_TXT_IDEA_128_CBC_WITH_MD5,
 	SSL2_CK_IDEA_128_CBC_WITH_MD5,
 	SSL_kRSA,
 	SSL_aRSA,
 	SSL_IDEA,
 	SSL_MD5,
 	SSL_SSLV2,
 	SSL_NOT_EXP|SSL_MEDIUM,
 	0,
 	128,
 	128,
 	},
 #endif

 /* DES_64_CBC_WITH_MD5 */
 	{
 	1,
 	SSL2_TXT_DES_64_CBC_WITH_MD5,
 	SSL2_CK_DES_64_CBC_WITH_MD5,
 	SSL_kRSA,
 	SSL_aRSA,
 	SSL_DES,
 	SSL_MD5,
 	SSL_SSLV2,
 	SSL_NOT_EXP|SSL_LOW,
 	0,
 	56,
 	56,
 	},

 /* DES_192_EDE3_CBC_WITH_MD5 */
 	{
 	1,
 	SSL2_TXT_DES_192_EDE3_CBC_WITH_MD5,
 	SSL2_CK_DES_192_EDE3_CBC_WITH_MD5,
 	SSL_kRSA,
 	SSL_aRSA,
 	SSL_3DES,
 	SSL_MD5,
 	SSL_SSLV2,
 	SSL_NOT_EXP|SSL_HIGH,
 	0,
 	168,
 	168,
 	},

 #if 0
 /* RC4_64_WITH_MD5 */
 	{
 	1,
 	SSL2_TXT_RC4_64_WITH_MD5,
 	SSL2_CK_RC4_64_WITH_MD5,
 	SSL_kRSA,
 	SSL_aRSA,
 	SSL_RC4,
 	SSL_MD5,
 	SSL_SSLV2,
 	SSL_NOT_EXP|SSL_LOW,
 	SSL2_CF_8_BYTE_ENC,
 	64,
 	64,
 	},
 #endif

 #if 0
 /* NULL SSLeay (testing) */
 	{
 	0,
 	SSL2_TXT_NULL,
 	SSL2_CK_NULL,
 	0,
 	0,
 	0,
 	0,
 	SSL_SSLV2,
 	SSL_STRONG_NONE,
 	0,
 	0,
 	0,
 	},
 #endif

 /* end of list :-) */
 	};

 long ssl2_default_timeout(void)
 	{
 	return(300);
 	}

 int ssl2_num_ciphers(void)
 	{
 	return(SSL2_NUM_CIPHERS);
 	}

 const SSL_CIPHER *ssl2_get_cipher(unsigned int u)
 	{
 	if (u < SSL2_NUM_CIPHERS)
 		return(&(ssl2_ciphers[SSL2_NUM_CIPHERS-1-u]));
 	else
 		return(NULL);
 	}

 int ssl2_pending(const SSL *s)
 	{
 	return SSL_in_init(s) ? 0 : s->s2->ract_data_length;
 	}

 int ssl2_new(SSL *s)
 	{
 	SSL2_STATE *s2;

 	if ((s2=OPENSSL_malloc(sizeof *s2)) == NULL) goto err;
 	memset(s2,0,sizeof *s2);

 #if SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER + 3 > SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER + 2
 #  error "assertion failed"
 #endif

 	if ((s2->rbuf=OPENSSL_malloc(
 		SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER+2)) == NULL) goto err;
 	/* wbuf needs one byte more because when using two-byte headers,
 	 * we leave the first byte unused in do_ssl_write (s2_pkt.c) */
 	if ((s2->wbuf=OPENSSL_malloc(
 		SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER+3)) == NULL) goto err;
 	s->s2=s2;

 	ssl2_clear(s);
 	return(1);
 err:
 	if (s2 != NULL)
 		{
 		if (s2->wbuf != NULL) OPENSSL_free(s2->wbuf);
 		if (s2->rbuf != NULL) OPENSSL_free(s2->rbuf);
 		OPENSSL_free(s2);
 		}
 	return(0);
 	}

 void ssl2_free(SSL *s)
 	{
 	SSL2_STATE *s2;

 	if(s == NULL)
 	    return;

 	s2=s->s2;
 	if (s2->rbuf != NULL) OPENSSL_free(s2->rbuf);
 	if (s2->wbuf != NULL) OPENSSL_free(s2->wbuf);
 	OPENSSL_cleanse(s2,sizeof *s2);
 	OPENSSL_free(s2);
 	s->s2=NULL;
 	}

 void ssl2_clear(SSL *s)
 	{
 	SSL2_STATE *s2;
 	unsigned char *rbuf,*wbuf;

 	s2=s->s2;

 	rbuf=s2->rbuf;
 	wbuf=s2->wbuf;

 	memset(s2,0,sizeof *s2);

 	s2->rbuf=rbuf;
 	s2->wbuf=wbuf;
 	s2->clear_text=1;
 	s->packet=s2->rbuf;
 	s->version=SSL2_VERSION;
 	s->packet_length=0;
 	}

 long ssl2_ctrl(SSL *s, int cmd, long larg, void *parg)
 	{
 	int ret=0;

 	switch(cmd)
 		{
 	case SSL_CTRL_GET_SESSION_REUSED:
 		ret=s->hit;
 		break;
 	default:
 		break;
 		}
 	return(ret);
 	}

 long ssl2_callback_ctrl(SSL *s, int cmd, void (*fp)(void))
 	{
 	return(0);
 	}

 long ssl2_ctx_ctrl(SSL_CTX *ctx, int cmd, long larg, void *parg)
 	{
 	return(0);
 	}

 long ssl2_ctx_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)(void))
 	{
 	return(0);
 	}

 /* This function needs to check if the ciphers required are actually
  * available */
 const SSL_CIPHER *ssl2_get_cipher_by_char(const unsigned char *p)
 	{
 	SSL_CIPHER c;
 	const SSL_CIPHER *cp;
 	unsigned long id;

 	id=0x02000000L|((unsigned long)p[0]<<16L)|
 		((unsigned long)p[1]<<8L)|(unsigned long)p[2];
 	c.id=id;
 	cp = OBJ_bsearch_ssl_cipher_id(&c, ssl2_ciphers, SSL2_NUM_CIPHERS);
 	if ((cp == NULL) || (cp->valid == 0))
 		return NULL;
 	else
 		return cp;
 	}

 int ssl2_put_cipher_by_char(const SSL_CIPHER *c, unsigned char *p)
 	{
 	long l;

 	if (p != NULL)
 		{
 		l=c->id;
 		if ((l & 0xff000000) != 0x02000000) return(0);
 		p[0]=((unsigned char)(l>>16L))&0xFF;
 		p[1]=((unsigned char)(l>> 8L))&0xFF;
 		p[2]=((unsigned char)(l     ))&0xFF;
 		}
 	return(3);
 	}

 int ssl2_generate_key_material(SSL *s)
 	{
 	unsigned int i;
 	EVP_MD_CTX ctx;
 	unsigned char *km;
 	unsigned char c='0';
 	const EVP_MD *md5;
 	int md_size;

 	md5 = EVP_md5();

 #ifdef CHARSET_EBCDIC
 	c = os_toascii['0']; /* Must be an ASCII '0', not EBCDIC '0',
 				see SSLv2 docu */
 #endif
 	EVP_MD_CTX_init(&ctx);
 	km=s->s2->key_material;

  	if (s->session->master_key_length < 0 ||
 			s->session->master_key_length > (int)sizeof(s->session->master_key))
  		{
  		SSLerr(SSL_F_SSL2_GENERATE_KEY_MATERIAL, ERR_R_INTERNAL_ERROR);
  		return 0;
  		}
 	md_size = EVP_MD_size(md5);
 	if (md_size < 0)
 	    return 0;
 	for (i=0; i<s->s2->key_material_length; i += md_size)
 		{
 		if (((km - s->s2->key_material) + md_size) >
 				(int)sizeof(s->s2->key_material))
 			{
 			/* EVP_DigestFinal_ex() below would write beyond buffer */
 			SSLerr(SSL_F_SSL2_GENERATE_KEY_MATERIAL, ERR_R_INTERNAL_ERROR);
 			return 0;
 			}

 		EVP_DigestInit_ex(&ctx, md5, NULL);

 		OPENSSL_assert(s->session->master_key_length >= 0
 		    && s->session->master_key_length
 		    < (int)sizeof(s->session->master_key));
 		EVP_DigestUpdate(&ctx,s->session->master_key,s->session->master_key_length);
 		EVP_DigestUpdate(&ctx,&c,1);
 		c++;
 		EVP_DigestUpdate(&ctx,s->s2->challenge,s->s2->challenge_length);
 		EVP_DigestUpdate(&ctx,s->s2->conn_id,s->s2->conn_id_length);
 		EVP_DigestFinal_ex(&ctx,km,NULL);
 		km += md_size;
 		}

 	EVP_MD_CTX_cleanup(&ctx);
 	return 1;
 	}

 void ssl2_return_error(SSL *s, int err)
 	{
 	if (!s->error)
 		{
 		s->error=3;
 		s->error_code=err;

 		ssl2_write_error(s);
 		}
 	}


 void ssl2_write_error(SSL *s)
 	{
 	unsigned char buf[3];
 	int i,error;

 	buf[0]=SSL2_MT_ERROR;
 	buf[1]=(s->error_code>>8)&0xff;
 	buf[2]=(s->error_code)&0xff;

 /*	state=s->rwstate;*/

 	error=s->error; /* number of bytes left to write */
 	s->error=0;
 	OPENSSL_assert(error >= 0 && error <= (int)sizeof(buf));
 	i=ssl2_write(s,&(buf[3-error]),error);

 /*	if (i == error) s->rwstate=state; */

 	if (i < 0)
 		s->error=error;
 	else
 		{
 		s->error=error-i;

 		if (s->error == 0)
 			if (s->msg_callback)
 				s->msg_callback(1, s->version, 0, buf, 3, s, s->msg_callback_arg); /* ERROR */
 		}
 	}

 int ssl2_shutdown(SSL *s)
 	{
 	s->shutdown=(SSL_SENT_SHUTDOWN|SSL_RECEIVED_SHUTDOWN);
 	return(1);
 	}
 #else /* !OPENSSL_NO_SSL2 */

 # if PEDANTIC
 static void *dummy=&dummy;
 # endif

 #endif
	/* ssl/s2_lib.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) 1998-2007 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 "ssl_locl.h"
	#ifndef OPENSSL_NO_SSL2
	#include <stdio.h>
	#include <openssl/objects.h>
	#include <openssl/evp.h>
	#include <openssl/md5.h>

	const char ssl2_version_str[]="SSLv2" OPENSSL_VERSION_PTEXT;

	#define SSL2_NUM_CIPHERS (sizeof(ssl2_ciphers)/sizeof(SSL_CIPHER))

	/* list of available SSLv2 ciphers (sorted by id) */
	OPENSSL_GLOBAL const SSL_CIPHER ssl2_ciphers[]={
	#if 0
	/* NULL_WITH_MD5 v3 */
	{
	1,
	SSL2_TXT_NULL_WITH_MD5,
	SSL2_CK_NULL_WITH_MD5,
	SSL_kRSA,
	SSL_aRSA,
	SSL_eNULL,
	SSL_MD5,
	SSL_SSLV2,
	SSL_EXPORT\|SSL_EXP40\|SSL_STRONG_NONE,
	0,
	0,
	0,
	},
	#endif

	/* RC4_128_WITH_MD5 */
	{
	1,
	SSL2_TXT_RC4_128_WITH_MD5,
	SSL2_CK_RC4_128_WITH_MD5,
	SSL_kRSA,
	SSL_aRSA,
	SSL_RC4,
	SSL_MD5,
	SSL_SSLV2,
	SSL_NOT_EXP\|SSL_MEDIUM,
	0,
	128,
	128,
	},

	/* RC4_128_EXPORT40_WITH_MD5 */
	{
	1,
	SSL2_TXT_RC4_128_EXPORT40_WITH_MD5,
	SSL2_CK_RC4_128_EXPORT40_WITH_MD5,
	SSL_kRSA,
	SSL_aRSA,
	SSL_RC4,
	SSL_MD5,
	SSL_SSLV2,
	SSL_EXPORT\|SSL_EXP40,
	SSL2_CF_5_BYTE_ENC,
	40,
	128,
	},

	/* RC2_128_CBC_WITH_MD5 */
	{
	1,
	SSL2_TXT_RC2_128_CBC_WITH_MD5,
	SSL2_CK_RC2_128_CBC_WITH_MD5,
	SSL_kRSA,
	SSL_aRSA,
	SSL_RC2,
	SSL_MD5,
	SSL_SSLV2,
	SSL_NOT_EXP\|SSL_MEDIUM,
	0,
	128,
	128,
	},

	/* RC2_128_CBC_EXPORT40_WITH_MD5 */
	{
	1,
	SSL2_TXT_RC2_128_CBC_EXPORT40_WITH_MD5,
	SSL2_CK_RC2_128_CBC_EXPORT40_WITH_MD5,
	SSL_kRSA,
	SSL_aRSA,
	SSL_RC2,
	SSL_MD5,
	SSL_SSLV2,
	SSL_EXPORT\|SSL_EXP40,
	SSL2_CF_5_BYTE_ENC,
	40,
	128,
	},

	#ifndef OPENSSL_NO_IDEA
	/* IDEA_128_CBC_WITH_MD5 */
	{
	1,
	SSL2_TXT_IDEA_128_CBC_WITH_MD5,
	SSL2_CK_IDEA_128_CBC_WITH_MD5,
	SSL_kRSA,
	SSL_aRSA,
	SSL_IDEA,
	SSL_MD5,
	SSL_SSLV2,
	SSL_NOT_EXP\|SSL_MEDIUM,
	0,
	128,
	128,
	},
	#endif

	/* DES_64_CBC_WITH_MD5 */
	{
	1,
	SSL2_TXT_DES_64_CBC_WITH_MD5,
	SSL2_CK_DES_64_CBC_WITH_MD5,
	SSL_kRSA,
	SSL_aRSA,
	SSL_DES,
	SSL_MD5,
	SSL_SSLV2,
	SSL_NOT_EXP\|SSL_LOW,
	0,
	56,
	56,
	},

	/* DES_192_EDE3_CBC_WITH_MD5 */
	{
	1,
	SSL2_TXT_DES_192_EDE3_CBC_WITH_MD5,
	SSL2_CK_DES_192_EDE3_CBC_WITH_MD5,
	SSL_kRSA,
	SSL_aRSA,
	SSL_3DES,
	SSL_MD5,
	SSL_SSLV2,
	SSL_NOT_EXP\|SSL_HIGH,
	0,
	168,
	168,
	},

	#if 0
	/* RC4_64_WITH_MD5 */
	{
	1,
	SSL2_TXT_RC4_64_WITH_MD5,
	SSL2_CK_RC4_64_WITH_MD5,
	SSL_kRSA,
	SSL_aRSA,
	SSL_RC4,
	SSL_MD5,
	SSL_SSLV2,
	SSL_NOT_EXP\|SSL_LOW,
	SSL2_CF_8_BYTE_ENC,
	64,
	64,
	},
	#endif

	#if 0
	/* NULL SSLeay (testing) */
	{
	0,
	SSL2_TXT_NULL,
	SSL2_CK_NULL,
	0,
	0,
	0,
	0,
	SSL_SSLV2,
	SSL_STRONG_NONE,
	0,
	0,
	0,
	},
	#endif

	/* end of list :-) */
	};

	long ssl2_default_timeout(void)
	{
	return(300);
	}

	int ssl2_num_ciphers(void)
	{
	return(SSL2_NUM_CIPHERS);
	}

	const SSL_CIPHER *ssl2_get_cipher(unsigned int u)
	{
	if (u < SSL2_NUM_CIPHERS)
	return(&(ssl2_ciphers[SSL2_NUM_CIPHERS-1-u]));
	else
	return(NULL);
	}

	int ssl2_pending(const SSL *s)
	{
	return SSL_in_init(s) ? 0 : s->s2->ract_data_length;
	}

	int ssl2_new(SSL *s)
	{
	SSL2_STATE *s2;

	if ((s2=OPENSSL_malloc(sizeof *s2)) == NULL) goto err;
	memset(s2,0,sizeof *s2);

	#if SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER + 3 > SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER + 2
	# error "assertion failed"
	#endif

	if ((s2->rbuf=OPENSSL_malloc(
	SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER+2)) == NULL) goto err;
	/* wbuf needs one byte more because when using two-byte headers,
	* we leave the first byte unused in do_ssl_write (s2_pkt.c) */
	if ((s2->wbuf=OPENSSL_malloc(
	SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER+3)) == NULL) goto err;
	s->s2=s2;

	ssl2_clear(s);
	return(1);
	err:
	if (s2 != NULL)
	{
	if (s2->wbuf != NULL) OPENSSL_free(s2->wbuf);
	if (s2->rbuf != NULL) OPENSSL_free(s2->rbuf);
	OPENSSL_free(s2);
	}
	return(0);
	}

	void ssl2_free(SSL *s)
	{
	SSL2_STATE *s2;

	if(s == NULL)
	return;

	s2=s->s2;
	if (s2->rbuf != NULL) OPENSSL_free(s2->rbuf);
	if (s2->wbuf != NULL) OPENSSL_free(s2->wbuf);
	OPENSSL_cleanse(s2,sizeof *s2);
	OPENSSL_free(s2);
	s->s2=NULL;
	}

	void ssl2_clear(SSL *s)
	{
	SSL2_STATE *s2;
	unsigned char rbuf,wbuf;

	s2=s->s2;

	rbuf=s2->rbuf;
	wbuf=s2->wbuf;

	memset(s2,0,sizeof *s2);

	s2->rbuf=rbuf;
	s2->wbuf=wbuf;
	s2->clear_text=1;
	s->packet=s2->rbuf;
	s->version=SSL2_VERSION;
	s->packet_length=0;
	}

	long ssl2_ctrl(SSL s, int cmd, long larg, void parg)
	{
	int ret=0;

	switch(cmd)
	{
	case SSL_CTRL_GET_SESSION_REUSED:
	ret=s->hit;
	break;
	default:
	break;
	}
	return(ret);
	}

	long ssl2_callback_ctrl(SSL s, int cmd, void (fp)(void))
	{
	return(0);
	}

	long ssl2_ctx_ctrl(SSL_CTX ctx, int cmd, long larg, void parg)
	{
	return(0);
	}

	long ssl2_ctx_callback_ctrl(SSL_CTX ctx, int cmd, void (fp)(void))
	{
	return(0);
	}

	/* This function needs to check if the ciphers required are actually
	* available */
	const SSL_CIPHER ssl2_get_cipher_by_char(const unsigned char p)
	{
	SSL_CIPHER c;
	const SSL_CIPHER *cp;
	unsigned long id;

	id=0x02000000L\|((unsigned long)p[0]<<16L)\|
	((unsigned long)p[1]<<8L)\|(unsigned long)p[2];
	c.id=id;
	cp = OBJ_bsearch_ssl_cipher_id(&c, ssl2_ciphers, SSL2_NUM_CIPHERS);
	if ((cp == NULL) \|\| (cp->valid == 0))
	return NULL;
	else
	return cp;
	}

	int ssl2_put_cipher_by_char(const SSL_CIPHER c, unsigned char p)
	{
	long l;

	if (p != NULL)
	{
	l=c->id;
	if ((l & 0xff000000) != 0x02000000) return(0);
	p[0]=((unsigned char)(l>>16L))&0xFF;
	p[1]=((unsigned char)(l>> 8L))&0xFF;
	p[2]=((unsigned char)(l ))&0xFF;
	}
	return(3);
	}

	int ssl2_generate_key_material(SSL *s)
	{
	unsigned int i;
	EVP_MD_CTX ctx;
	unsigned char *km;
	unsigned char c='0';
	const EVP_MD *md5;
	int md_size;

	md5 = EVP_md5();

	#ifdef CHARSET_EBCDIC
	c = os_toascii['0']; /* Must be an ASCII '0', not EBCDIC '0',
	see SSLv2 docu */
	#endif
	EVP_MD_CTX_init(&ctx);
	km=s->s2->key_material;

	if (s->session->master_key_length < 0 \|\|
	s->session->master_key_length > (int)sizeof(s->session->master_key))
	{
	SSLerr(SSL_F_SSL2_GENERATE_KEY_MATERIAL, ERR_R_INTERNAL_ERROR);
	return 0;
	}
	md_size = EVP_MD_size(md5);
	if (md_size < 0)
	return 0;
	for (i=0; i<s->s2->key_material_length; i += md_size)
	{
	if (((km - s->s2->key_material) + md_size) >
	(int)sizeof(s->s2->key_material))
	{
	/* EVP_DigestFinal_ex() below would write beyond buffer */
	SSLerr(SSL_F_SSL2_GENERATE_KEY_MATERIAL, ERR_R_INTERNAL_ERROR);
	return 0;
	}

	EVP_DigestInit_ex(&ctx, md5, NULL);

	OPENSSL_assert(s->session->master_key_length >= 0
	&& s->session->master_key_length
	< (int)sizeof(s->session->master_key));
	EVP_DigestUpdate(&ctx,s->session->master_key,s->session->master_key_length);
	EVP_DigestUpdate(&ctx,&c,1);
	c++;
	EVP_DigestUpdate(&ctx,s->s2->challenge,s->s2->challenge_length);
	EVP_DigestUpdate(&ctx,s->s2->conn_id,s->s2->conn_id_length);
	EVP_DigestFinal_ex(&ctx,km,NULL);
	km += md_size;
	}

	EVP_MD_CTX_cleanup(&ctx);
	return 1;
	}

	void ssl2_return_error(SSL *s, int err)
	{
	if (!s->error)
	{
	s->error=3;
	s->error_code=err;

	ssl2_write_error(s);
	}
	}


	void ssl2_write_error(SSL *s)
	{
	unsigned char buf[3];
	int i,error;

	buf[0]=SSL2_MT_ERROR;
	buf[1]=(s->error_code>>8)&0xff;
	buf[2]=(s->error_code)&0xff;

	/* state=s->rwstate;*/

	error=s->error; /* number of bytes left to write */
	s->error=0;
	OPENSSL_assert(error >= 0 && error <= (int)sizeof(buf));
	i=ssl2_write(s,&(buf[3-error]),error);

	/* if (i == error) s->rwstate=state; */

	if (i < 0)
	s->error=error;
	else
	{
	s->error=error-i;

	if (s->error == 0)
	if (s->msg_callback)
	s->msg_callback(1, s->version, 0, buf, 3, s, s->msg_callback_arg); /* ERROR */
	}
	}

	int ssl2_shutdown(SSL *s)
	{
	s->shutdown=(SSL_SENT_SHUTDOWN\|SSL_RECEIVED_SHUTDOWN);
	return(1);
	}
	#else /* !OPENSSL_NO_SSL2 */

	# if PEDANTIC
	static void *dummy=&dummy;
	# endif

	#endif