/* 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