/* 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);

 	}