/* 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.]

 */

/*

 © Portions copyright (c) 2006 Nokia Corporation.  All rights reserved.

 */

#include "ssl_locl.h"

#ifndef OPENSSL_NO_SSL2

#include <stdio.h>

#include <openssl/objects.h>

#include <openssl/evp.h>

#include <openssl/md5.h>

#if (defined(SYMBIAN) && (defined(__WINSCW__) || defined(__WINS__)))

#include "libssl_wsd.h"

#endif

#ifdef EMULATOR

	GET_STATIC_VAR_FROM_TLS(sslv2_base_method_data,s2_lib,SSL_METHOD)

	#define sslv2_base_method_data (*GET_WSD_VAR_NAME(sslv2_base_method_data,s2_lib,s)())

#endif

const char ssl2_version_str[]="SSLv2" OPENSSL_VERSION_PTEXT;

#ifndef EMULATOR

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

/* #else */

/* #define SSL2_NUM_CIPHERS  10		Defined in libssl_wsd.h */

#endif

/* list of available SSLv2 ciphers (sorted by id) */

#ifdef EMULATOR

	GET_GLOBAL_ARRAY_FROM_TLS(ssl2_ciphers,s2_lib,SSL_CIPHER)

	#define ssl2_ciphers (GET_WSD_VAR_NAME(ssl2_ciphers,s2_lib,g)())

#endif

#ifndef EMULATOR

OPENSSL_GLOBAL SSL_CIPHER ssl2_ciphers[]={

#else

OPENSSL_GLOBAL const SSL_CIPHER temp_ssl2_ciphers[]={

#endif

/* NULL_WITH_MD5 v3 */

#if 0

	{

	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,

	SSL_ALL_CIPHERS,

	SSL_ALL_STRENGTHS,

	},

#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,

	SSL_ALL_CIPHERS,

	SSL_ALL_STRENGTHS,

	},

/* 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,

	SSL_ALL_CIPHERS,

	SSL_ALL_STRENGTHS,

	},

/* 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,

	SSL_ALL_CIPHERS,

	SSL_ALL_STRENGTHS,

	},

/* 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,

	SSL_ALL_CIPHERS,

	SSL_ALL_STRENGTHS,

	},

/* IDEA_128_CBC_WITH_MD5 */

#ifndef OPENSSL_NO_IDEA

	{

	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,

	SSL_ALL_CIPHERS,

	SSL_ALL_STRENGTHS,

	},

#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,

	SSL_ALL_CIPHERS,

	SSL_ALL_STRENGTHS,

	},

/* 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,

	SSL_ALL_CIPHERS,

	SSL_ALL_STRENGTHS,

	},

/* RC4_64_WITH_MD5 */

#if 0

	{

	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,

	SSL_ALL_CIPHERS,

	SSL_ALL_STRENGTHS,

	},

#endif

/* NULL SSLeay (testing) */

#if 0

	{	

	0,

	SSL2_TXT_NULL,

	SSL2_CK_NULL,

	0,

	SSL_STRONG_NONE,

	0,

	0,

	0,

	SSL_ALL_CIPHERS,

	SSL_ALL_STRENGTHS,

	},

#endif

/* end of list :-) */

	};

long ssl2_default_timeout(void)

	{

	return(300);

	}

IMPLEMENT_ssl2_meth_func(sslv2_base_method,

			ssl_undefined_function,

			ssl_undefined_function,

			ssl_bad_method)

int ssl2_num_ciphers(void)

	{

	return(SSL2_NUM_CIPHERS);

	}

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 */

SSL_CIPHER *ssl2_get_cipher_by_char(const unsigned char *p)

	{

	SSL_CIPHER c,*cp;

	unsigned long id;

	id=0x02000000L|((unsigned long)p[0]<<16L)|

		((unsigned long)p[1]<<8L)|(unsigned long)p[2];

	c.id=id;

	cp = (SSL_CIPHER *)OBJ_bsearch((char *)&c,

		(char *)ssl2_ciphers,

		SSL2_NUM_CIPHERS,sizeof(SSL_CIPHER),

		FP_ICC ssl_cipher_id_cmp);

	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;

	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;

 		}

	for (i=0; i<s->s2->key_material_length; i += EVP_MD_size(md5))

		{

		if (((km - s->s2->key_material) + EVP_MD_size(md5)) >

				(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 += EVP_MD_size(md5);

		}

	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