/* ssl/ssl_asn1.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.]

 */

#include <stdio.h>

#include <stdlib.h>

#include "ssl_locl.h"

#include <openssl/asn1_mac.h>

#include <openssl/objects.h>

#include <openssl/x509.h>

typedef struct ssl_session_asn1_st

	{

	ASN1_INTEGER version;

	ASN1_INTEGER ssl_version;

	ASN1_OCTET_STRING cipher;

	ASN1_OCTET_STRING master_key;

	ASN1_OCTET_STRING session_id;

	ASN1_OCTET_STRING session_id_context;

	ASN1_OCTET_STRING key_arg;

#ifndef OPENSSL_NO_KRB5

        ASN1_OCTET_STRING krb5_princ;

#endif /* OPENSSL_NO_KRB5 */

	ASN1_INTEGER time;

	ASN1_INTEGER timeout;

	ASN1_INTEGER verify_result;

	} SSL_SESSION_ASN1;

EXPORT_C int i2d_SSL_SESSION(SSL_SESSION *in, unsigned char **pp)

	{

#define LSIZE2 (sizeof(long)*2)

	int v1=0,v2=0,v3=0,v4=0,v5=0;

	unsigned char buf[4],ibuf1[LSIZE2],ibuf2[LSIZE2];

	unsigned char ibuf3[LSIZE2],ibuf4[LSIZE2],ibuf5[LSIZE2];

	long l;

	SSL_SESSION_ASN1 a;

	M_ASN1_I2D_vars(in);

	if ((in == NULL) || ((in->cipher == NULL) && (in->cipher_id == 0)))

		return(0);

	/* Note that I cheat in the following 2 assignments.  I know

	 * that if the ASN1_INTEGER passed to ASN1_INTEGER_set

	 * is > sizeof(long)+1, the buffer will not be re-OPENSSL_malloc()ed.

	 * This is a bit evil but makes things simple, no dynamic allocation

	 * to clean up :-) */

	a.version.length=LSIZE2;

	a.version.type=V_ASN1_INTEGER;

	a.version.data=ibuf1;

	ASN1_INTEGER_set(&(a.version),SSL_SESSION_ASN1_VERSION);

	a.ssl_version.length=LSIZE2;

	a.ssl_version.type=V_ASN1_INTEGER;

	a.ssl_version.data=ibuf2;

	ASN1_INTEGER_set(&(a.ssl_version),in->ssl_version);

	a.cipher.type=V_ASN1_OCTET_STRING;

	a.cipher.data=buf;

	if (in->cipher == NULL)

		l=in->cipher_id;

	else

		l=in->cipher->id;

	if (in->ssl_version == SSL2_VERSION)

		{

		a.cipher.length=3;

		buf[0]=((unsigned char)(l>>16L))&0xff;

		buf[1]=((unsigned char)(l>> 8L))&0xff;

		buf[2]=((unsigned char)(l     ))&0xff;

		}

	else

		{

		a.cipher.length=2;

		buf[0]=((unsigned char)(l>>8L))&0xff;

		buf[1]=((unsigned char)(l    ))&0xff;

		}

	a.master_key.length=in->master_key_length;

	a.master_key.type=V_ASN1_OCTET_STRING;

	a.master_key.data=in->master_key;

	a.session_id.length=in->session_id_length;

	a.session_id.type=V_ASN1_OCTET_STRING;

	a.session_id.data=in->session_id;

	a.session_id_context.length=in->sid_ctx_length;

	a.session_id_context.type=V_ASN1_OCTET_STRING;

	a.session_id_context.data=in->sid_ctx;

	a.key_arg.length=in->key_arg_length;

	a.key_arg.type=V_ASN1_OCTET_STRING;

	a.key_arg.data=in->key_arg;

#ifndef OPENSSL_NO_KRB5

	if (in->krb5_client_princ_len)

		{

		a.krb5_princ.length=in->krb5_client_princ_len;

		a.krb5_princ.type=V_ASN1_OCTET_STRING;

		a.krb5_princ.data=in->krb5_client_princ;

		}

#endif /* OPENSSL_NO_KRB5 */

	if (in->time != 0L)

		{

		a.time.length=LSIZE2;

		a.time.type=V_ASN1_INTEGER;

		a.time.data=ibuf3;

		ASN1_INTEGER_set(&(a.time),in->time);

		}

	if (in->timeout != 0L)

		{

		a.timeout.length=LSIZE2;

		a.timeout.type=V_ASN1_INTEGER;

		a.timeout.data=ibuf4;

		ASN1_INTEGER_set(&(a.timeout),in->timeout);

		}

	if (in->verify_result != X509_V_OK)

		{

		a.verify_result.length=LSIZE2;

		a.verify_result.type=V_ASN1_INTEGER;

		a.verify_result.data=ibuf5;

		ASN1_INTEGER_set(&a.verify_result,in->verify_result);

		}

	M_ASN1_I2D_len(&(a.version),		i2d_ASN1_INTEGER);

	M_ASN1_I2D_len(&(a.ssl_version),	i2d_ASN1_INTEGER);

	M_ASN1_I2D_len(&(a.cipher),		i2d_ASN1_OCTET_STRING);

	M_ASN1_I2D_len(&(a.session_id),		i2d_ASN1_OCTET_STRING);

	M_ASN1_I2D_len(&(a.master_key),		i2d_ASN1_OCTET_STRING);

#ifndef OPENSSL_NO_KRB5

	if (in->krb5_client_princ_len)

        	M_ASN1_I2D_len(&(a.krb5_princ),	i2d_ASN1_OCTET_STRING);

#endif /* OPENSSL_NO_KRB5 */

	if (in->key_arg_length > 0)

		M_ASN1_I2D_len_IMP_opt(&(a.key_arg),i2d_ASN1_OCTET_STRING);

	if (in->time != 0L)

		M_ASN1_I2D_len_EXP_opt(&(a.time),i2d_ASN1_INTEGER,1,v1);

	if (in->timeout != 0L)

		M_ASN1_I2D_len_EXP_opt(&(a.timeout),i2d_ASN1_INTEGER,2,v2);

	if (in->peer != NULL)

		M_ASN1_I2D_len_EXP_opt(in->peer,i2d_X509,3,v3);

	M_ASN1_I2D_len_EXP_opt(&a.session_id_context,i2d_ASN1_OCTET_STRING,4,v4);

	if (in->verify_result != X509_V_OK)

		M_ASN1_I2D_len_EXP_opt(&(a.verify_result),i2d_ASN1_INTEGER,5,v5);

	M_ASN1_I2D_seq_total();

	M_ASN1_I2D_put(&(a.version),		i2d_ASN1_INTEGER);

	M_ASN1_I2D_put(&(a.ssl_version),	i2d_ASN1_INTEGER);

	M_ASN1_I2D_put(&(a.cipher),		i2d_ASN1_OCTET_STRING);

	M_ASN1_I2D_put(&(a.session_id),		i2d_ASN1_OCTET_STRING);

	M_ASN1_I2D_put(&(a.master_key),		i2d_ASN1_OCTET_STRING);

#ifndef OPENSSL_NO_KRB5

	if (in->krb5_client_princ_len)

        	M_ASN1_I2D_put(&(a.krb5_princ),	i2d_ASN1_OCTET_STRING);

#endif /* OPENSSL_NO_KRB5 */

	if (in->key_arg_length > 0)

		M_ASN1_I2D_put_IMP_opt(&(a.key_arg),i2d_ASN1_OCTET_STRING,0);

	if (in->time != 0L)

		M_ASN1_I2D_put_EXP_opt(&(a.time),i2d_ASN1_INTEGER,1,v1);

	if (in->timeout != 0L)

		M_ASN1_I2D_put_EXP_opt(&(a.timeout),i2d_ASN1_INTEGER,2,v2);

	if (in->peer != NULL)

		M_ASN1_I2D_put_EXP_opt(in->peer,i2d_X509,3,v3);

	M_ASN1_I2D_put_EXP_opt(&a.session_id_context,i2d_ASN1_OCTET_STRING,4,

			       v4);

	if (in->verify_result != X509_V_OK)

		M_ASN1_I2D_put_EXP_opt(&a.verify_result,i2d_ASN1_INTEGER,5,v5);

	M_ASN1_I2D_finish();

	}

EXPORT_C SSL_SESSION *d2i_SSL_SESSION(SSL_SESSION **a, const unsigned char **pp,

	     long length)

	{

	int version,ssl_version=0,i;

	long id;

	ASN1_INTEGER ai,*aip;

	ASN1_OCTET_STRING os,*osp;

	M_ASN1_D2I_vars(a,SSL_SESSION *,SSL_SESSION_new);

	aip= &ai;

	osp= &os;

	M_ASN1_D2I_Init();

	M_ASN1_D2I_start_sequence();

	ai.data=NULL; ai.length=0;

	M_ASN1_D2I_get_x(ASN1_INTEGER,aip,d2i_ASN1_INTEGER);

	version=(int)ASN1_INTEGER_get(aip);

	if (ai.data != NULL) { OPENSSL_free(ai.data); ai.data=NULL; ai.length=0; }

	/* we don't care about the version right now :-) */

	M_ASN1_D2I_get_x(ASN1_INTEGER,aip,d2i_ASN1_INTEGER);

	ssl_version=(int)ASN1_INTEGER_get(aip);

	ret->ssl_version=ssl_version;

	if (ai.data != NULL) { OPENSSL_free(ai.data); ai.data=NULL; ai.length=0; }

	os.data=NULL; os.length=0;

	M_ASN1_D2I_get_x(ASN1_OCTET_STRING,osp,d2i_ASN1_OCTET_STRING);

	if (ssl_version == SSL2_VERSION)

		{

		if (os.length != 3)

			{

			c.error=SSL_R_CIPHER_CODE_WRONG_LENGTH;

			goto err;

			}

		id=0x02000000L|

			((unsigned long)os.data[0]<<16L)|

			((unsigned long)os.data[1]<< 8L)|

			 (unsigned long)os.data[2];

		}

	else if ((ssl_version>>8) == SSL3_VERSION_MAJOR)

		{

		if (os.length != 2)

			{

			c.error=SSL_R_CIPHER_CODE_WRONG_LENGTH;

			goto err;

			}

		id=0x03000000L|

			((unsigned long)os.data[0]<<8L)|

			 (unsigned long)os.data[1];

		}

	else

		{

		SSLerr(SSL_F_D2I_SSL_SESSION,SSL_R_UNKNOWN_SSL_VERSION);

		return(NULL);

		}

	ret->cipher=NULL;

	ret->cipher_id=id;

	M_ASN1_D2I_get_x(ASN1_OCTET_STRING,osp,d2i_ASN1_OCTET_STRING);

	if ((ssl_version>>8) == SSL3_VERSION_MAJOR)

		i=SSL3_MAX_SSL_SESSION_ID_LENGTH;

	else /* if (ssl_version>>8 == SSL2_VERSION_MAJOR) */

		i=SSL2_MAX_SSL_SESSION_ID_LENGTH;

	if (os.length > i)

		os.length = i;

	if (os.length > (int)sizeof(ret->session_id)) /* can't happen */

		os.length = sizeof(ret->session_id);

	ret->session_id_length=os.length;

	OPENSSL_assert(os.length <= (int)sizeof(ret->session_id));

	memcpy(ret->session_id,os.data,os.length);

	M_ASN1_D2I_get_x(ASN1_OCTET_STRING,osp,d2i_ASN1_OCTET_STRING);

	if (ret->master_key_length > SSL_MAX_MASTER_KEY_LENGTH)

		ret->master_key_length=SSL_MAX_MASTER_KEY_LENGTH;

	else

		ret->master_key_length=os.length;

	memcpy(ret->master_key,os.data,ret->master_key_length);

	os.length=0;

#ifndef OPENSSL_NO_KRB5

	os.length=0;

	M_ASN1_D2I_get_opt(osp,d2i_ASN1_OCTET_STRING,V_ASN1_OCTET_STRING);

	if (os.data)

		{

        	if (os.length > SSL_MAX_KRB5_PRINCIPAL_LENGTH)

            		ret->krb5_client_princ_len=0;

		else

			ret->krb5_client_princ_len=os.length;

		memcpy(ret->krb5_client_princ,os.data,ret->krb5_client_princ_len);

		OPENSSL_free(os.data);

		os.data = NULL;

		os.length = 0;

		}

	else

		ret->krb5_client_princ_len=0;

#endif /* OPENSSL_NO_KRB5 */

	M_ASN1_D2I_get_IMP_opt(osp,d2i_ASN1_OCTET_STRING,0,V_ASN1_OCTET_STRING);

	if (os.length > SSL_MAX_KEY_ARG_LENGTH)

		ret->key_arg_length=SSL_MAX_KEY_ARG_LENGTH;

	else

		ret->key_arg_length=os.length;

	memcpy(ret->key_arg,os.data,ret->key_arg_length);

	if (os.data != NULL) OPENSSL_free(os.data);

	ai.length=0;

	M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,1);

	if (ai.data != NULL)

		{

		ret->time=ASN1_INTEGER_get(aip);

		OPENSSL_free(ai.data); ai.data=NULL; ai.length=0;

		}

	else

		ret->time=(unsigned long)time(NULL);

	ai.length=0;

	M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,2);

	if (ai.data != NULL)

		{

		ret->timeout=ASN1_INTEGER_get(aip);

		OPENSSL_free(ai.data); ai.data=NULL; ai.length=0;

		}

	else

		ret->timeout=3;

	if (ret->peer != NULL)

		{

		X509_free(ret->peer);

		ret->peer=NULL;

		}

	M_ASN1_D2I_get_EXP_opt(ret->peer,d2i_X509,3);

	os.length=0;

	os.data=NULL;

	M_ASN1_D2I_get_EXP_opt(osp,d2i_ASN1_OCTET_STRING,4);

	if(os.data != NULL)

	    {

	    if (os.length > SSL_MAX_SID_CTX_LENGTH)

		{

		ret->sid_ctx_length=os.length;

		SSLerr(SSL_F_D2I_SSL_SESSION,SSL_R_BAD_LENGTH);

		}

	    else

		{

		ret->sid_ctx_length=os.length;

		memcpy(ret->sid_ctx,os.data,os.length);

		}

	    OPENSSL_free(os.data); os.data=NULL; os.length=0;

	    }

	else

	    ret->sid_ctx_length=0;

	ai.length=0;

	M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,5);

	if (ai.data != NULL)

		{

		ret->verify_result=ASN1_INTEGER_get(aip);

		OPENSSL_free(ai.data); ai.data=NULL; ai.length=0;

		}

	else

		ret->verify_result=X509_V_OK;

	M_ASN1_D2I_Finish(a,SSL_SESSION_free,SSL_F_D2I_SSL_SESSION);

	}