ssl/ssl_asn1.c - third_party/openssl - Git at Google

 /* 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 2005 Nokia. All rights reserved.
  *
  * The portions of the attached software ("Contribution") is developed by
  * Nokia Corporation and is licensed pursuant to the OpenSSL open source
  * license.
  *
  * The Contribution, originally written by Mika Kousa and Pasi Eronen of
  * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
  * support (see RFC 4279) to OpenSSL.
  *
  * No patent licenses or other rights except those expressly stated in
  * the OpenSSL open source license shall be deemed granted or received
  * expressly, by implication, estoppel, or otherwise.
  *
  * No assurances are provided by Nokia that the Contribution does not
  * infringe the patent or other intellectual property rights of any third
  * party or that the license provides you with all the necessary rights
  * to make use of the Contribution.
  *
  * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
  * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
  * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
  * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
  * OTHERWISE.
  */

 #include <stdio.h>
 #include <stdlib.h>
 #include "ssl_locl.h"
 #include <openssl/asn1t.h>
 #include <openssl/x509.h>

 typedef struct {
     long version;
     long ssl_version;
     ASN1_OCTET_STRING *cipher;
     ASN1_OCTET_STRING *comp_id;
     ASN1_OCTET_STRING *master_key;
     ASN1_OCTET_STRING *session_id;
     ASN1_OCTET_STRING *key_arg;
     long time;
     long timeout;
     X509 *peer;
     ASN1_OCTET_STRING *session_id_context;
     long verify_result;
     ASN1_OCTET_STRING *tlsext_hostname;
     long tlsext_tick_lifetime_hint;
     ASN1_OCTET_STRING *tlsext_tick;
 #ifndef OPENSSL_NO_PSK
     ASN1_OCTET_STRING *psk_identity_hint;
     ASN1_OCTET_STRING *psk_identity;
 #endif
 #ifndef OPENSSL_NO_SRP
     ASN1_OCTET_STRING *srp_username;
 #endif
     long flags;
 } SSL_SESSION_ASN1;

 ASN1_SEQUENCE(SSL_SESSION_ASN1) = {
     ASN1_SIMPLE(SSL_SESSION_ASN1, version, LONG),
     ASN1_SIMPLE(SSL_SESSION_ASN1, ssl_version, LONG),
     ASN1_SIMPLE(SSL_SESSION_ASN1, cipher, ASN1_OCTET_STRING),
     ASN1_SIMPLE(SSL_SESSION_ASN1, session_id, ASN1_OCTET_STRING),
     ASN1_SIMPLE(SSL_SESSION_ASN1, master_key, ASN1_OCTET_STRING),
     ASN1_IMP_OPT(SSL_SESSION_ASN1, key_arg, ASN1_OCTET_STRING, 0),
     ASN1_EXP_OPT(SSL_SESSION_ASN1, time, ZLONG, 1),
     ASN1_EXP_OPT(SSL_SESSION_ASN1, timeout, ZLONG, 2),
     ASN1_EXP_OPT(SSL_SESSION_ASN1, peer, X509, 3),
     ASN1_EXP_OPT(SSL_SESSION_ASN1, session_id_context, ASN1_OCTET_STRING, 4),
     ASN1_EXP_OPT(SSL_SESSION_ASN1, verify_result, ZLONG, 5),
     ASN1_EXP_OPT(SSL_SESSION_ASN1, tlsext_hostname, ASN1_OCTET_STRING, 6),
 #ifndef OPENSSL_NO_PSK
     ASN1_EXP_OPT(SSL_SESSION_ASN1, psk_identity_hint, ASN1_OCTET_STRING, 7),
     ASN1_EXP_OPT(SSL_SESSION_ASN1, psk_identity, ASN1_OCTET_STRING, 8),
 #endif
     ASN1_EXP_OPT(SSL_SESSION_ASN1, tlsext_tick_lifetime_hint, ZLONG, 9),
     ASN1_EXP_OPT(SSL_SESSION_ASN1, tlsext_tick, ASN1_OCTET_STRING, 10),
     ASN1_EXP_OPT(SSL_SESSION_ASN1, comp_id, ASN1_OCTET_STRING, 11),
 #ifndef OPENSSL_NO_SRP
     ASN1_EXP_OPT(SSL_SESSION_ASN1, srp_username, ASN1_OCTET_STRING, 12),
 #endif
     ASN1_EXP_OPT(SSL_SESSION_ASN1, flags, ZLONG, 13)
 } static_ASN1_SEQUENCE_END(SSL_SESSION_ASN1)

 IMPLEMENT_STATIC_ASN1_ENCODE_FUNCTIONS(SSL_SESSION_ASN1)

 /* Utility functions for i2d_SSL_SESSION */

 /* Initialise OCTET STRING from buffer and length */

 static void ssl_session_oinit(ASN1_OCTET_STRING **dest, ASN1_OCTET_STRING *os,
                               unsigned char *data, size_t len)
 {
     os->data = data;
     os->length = len;
     os->flags = 0;
     *dest = os;
 }

 /* Initialise OCTET STRING from string */
 static void ssl_session_sinit(ASN1_OCTET_STRING **dest, ASN1_OCTET_STRING *os,
                               char *data)
 {
     if (data != NULL)
         ssl_session_oinit(dest, os, (unsigned char *)data, strlen(data));
     else
         *dest = NULL;
 }

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

     SSL_SESSION_ASN1 as;

     ASN1_OCTET_STRING cipher;
     unsigned char cipher_data[2];
     ASN1_OCTET_STRING master_key, session_id, sid_ctx;

 #ifndef OPENSSL_NO_COMP
     ASN1_OCTET_STRING comp_id;
     unsigned char comp_id_data;
 #endif

     ASN1_OCTET_STRING tlsext_hostname, tlsext_tick;

 #ifndef OPENSSL_NO_SRP
     ASN1_OCTET_STRING srp_username;
 #endif

 #ifndef OPENSSL_NO_PSK
     ASN1_OCTET_STRING psk_identity, psk_identity_hint;
 #endif

     long l;

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

     memset(&as, 0, sizeof(as));

     as.version = SSL_SESSION_ASN1_VERSION;
     as.ssl_version = in->ssl_version;

     if (in->cipher == NULL)
         l = in->cipher_id;
     else
         l = in->cipher->id;
     cipher_data[0] = ((unsigned char)(l >> 8L)) & 0xff;
     cipher_data[1] = ((unsigned char)(l)) & 0xff;

     ssl_session_oinit(&as.cipher, &cipher, cipher_data, 2);

 #ifndef OPENSSL_NO_COMP
     if (in->compress_meth) {
         comp_id_data = (unsigned char)in->compress_meth;
         ssl_session_oinit(&as.comp_id, &comp_id, &comp_id_data, 1);
     }
 #endif

     ssl_session_oinit(&as.master_key, &master_key,
                       in->master_key, in->master_key_length);

     ssl_session_oinit(&as.session_id, &session_id,
                       in->session_id, in->session_id_length);

     ssl_session_oinit(&as.session_id_context, &sid_ctx,
                       in->sid_ctx, in->sid_ctx_length);

     as.time = in->time;
     as.timeout = in->timeout;
     as.verify_result = in->verify_result;

     as.peer = in->peer;

     ssl_session_sinit(&as.tlsext_hostname, &tlsext_hostname,
                       in->tlsext_hostname);
     if (in->tlsext_tick) {
         ssl_session_oinit(&as.tlsext_tick, &tlsext_tick,
                           in->tlsext_tick, in->tlsext_ticklen);
     }
     if (in->tlsext_tick_lifetime_hint > 0)
         as.tlsext_tick_lifetime_hint = in->tlsext_tick_lifetime_hint;
 #ifndef OPENSSL_NO_PSK
     ssl_session_sinit(&as.psk_identity_hint, &psk_identity_hint,
                       in->psk_identity_hint);
     ssl_session_sinit(&as.psk_identity, &psk_identity, in->psk_identity);
 #endif                          /* OPENSSL_NO_PSK */
 #ifndef OPENSSL_NO_SRP
     ssl_session_sinit(&as.srp_username, &srp_username, in->srp_username);
 #endif                          /* OPENSSL_NO_SRP */

     as.flags = in->flags;

     return i2d_SSL_SESSION_ASN1(&as, pp);

 }

 /* Utility functions for d2i_SSL_SESSION */

 /* OPENSSL_strndup an OCTET STRING */

 static int ssl_session_strndup(char **pdst, ASN1_OCTET_STRING *src)
 {
     OPENSSL_free(*pdst);
     *pdst = NULL;
     if (src == NULL)
         return 1;
     *pdst = OPENSSL_strndup((char *)src->data, src->length);
     if (*pdst == NULL)
         return 0;
     return 1;
 }

 /* Copy an OCTET STRING, return error if it exceeds maximum length */

 static int ssl_session_memcpy(unsigned char *dst, unsigned int *pdstlen,
                               ASN1_OCTET_STRING *src, int maxlen)
 {
     if (src == NULL) {
         *pdstlen = 0;
         return 1;
     }
     if (src->length > maxlen)
         return 0;
     memcpy(dst, src->data, src->length);
     *pdstlen = src->length;
     return 1;
 }

 SSL_SESSION *d2i_SSL_SESSION(SSL_SESSION **a, const unsigned char **pp,
                              long length)
 {
     long id;
     unsigned int tmpl;
     const unsigned char *p = *pp;
     SSL_SESSION_ASN1 *as = NULL;
     SSL_SESSION *ret = NULL;

     as = d2i_SSL_SESSION_ASN1(NULL, &p, length);
     /* ASN.1 code returns suitable error */
     if (as == NULL)
         goto err;

     if (!a || !*a) {
         ret = SSL_SESSION_new();
         if (ret == NULL)
             goto err;
     } else {
         ret = *a;
     }

     if (as->version != SSL_SESSION_ASN1_VERSION) {
         SSLerr(SSL_F_D2I_SSL_SESSION, SSL_R_UNKNOWN_SSL_VERSION);
         goto err;
     }

     if ((as->ssl_version >> 8) != SSL3_VERSION_MAJOR
         && (as->ssl_version >> 8) != DTLS1_VERSION_MAJOR
         && as->ssl_version != DTLS1_BAD_VER) {
         SSLerr(SSL_F_D2I_SSL_SESSION, SSL_R_UNSUPPORTED_SSL_VERSION);
         goto err;
     }

     ret->ssl_version = (int)as->ssl_version;

     if (as->cipher->length != 2) {
         SSLerr(SSL_F_D2I_SSL_SESSION, SSL_R_CIPHER_CODE_WRONG_LENGTH);
         goto err;
     }

     p = as->cipher->data;
     id = 0x03000000L | ((unsigned long)p[0] << 8L) | (unsigned long)p[1];

     ret->cipher = NULL;
     ret->cipher_id = id;

     if (!ssl_session_memcpy(ret->session_id, &ret->session_id_length,
                             as->session_id, SSL3_MAX_SSL_SESSION_ID_LENGTH))
         goto err;

     if (!ssl_session_memcpy(ret->master_key, &tmpl,
                             as->master_key, SSL_MAX_MASTER_KEY_LENGTH))
         goto err;

     ret->master_key_length = tmpl;

     if (as->time != 0)
         ret->time = as->time;
     else
         ret->time = (unsigned long)time(NULL);

     if (as->timeout != 0)
         ret->timeout = as->timeout;
     else
         ret->timeout = 3;

     X509_free(ret->peer);
     ret->peer = as->peer;
     as->peer = NULL;

     if (!ssl_session_memcpy(ret->sid_ctx, &ret->sid_ctx_length,
                             as->session_id_context, SSL_MAX_SID_CTX_LENGTH))
         goto err;

     /* NB: this defaults to zero which is X509_V_OK */
     ret->verify_result = as->verify_result;

     if (!ssl_session_strndup(&ret->tlsext_hostname, as->tlsext_hostname))
         goto err;

 #ifndef OPENSSL_NO_PSK
     if (!ssl_session_strndup(&ret->psk_identity_hint, as->psk_identity_hint))
         goto err;
     if (!ssl_session_strndup(&ret->psk_identity, as->psk_identity))
         goto err;
 #endif

     ret->tlsext_tick_lifetime_hint = as->tlsext_tick_lifetime_hint;
     if (as->tlsext_tick) {
         ret->tlsext_tick = as->tlsext_tick->data;
         ret->tlsext_ticklen = as->tlsext_tick->length;
         as->tlsext_tick->data = NULL;
     } else {
         ret->tlsext_tick = NULL;
     }
 #ifndef OPENSSL_NO_COMP
     if (as->comp_id) {
         if (as->comp_id->length != 1) {
             SSLerr(SSL_F_D2I_SSL_SESSION, SSL_R_BAD_LENGTH);
             goto err;
         }
         ret->compress_meth = as->comp_id->data[0];
     } else {
         ret->compress_meth = 0;
     }
 #endif

 #ifndef OPENSSL_NO_SRP
     if (!ssl_session_strndup(&ret->srp_username, as->srp_username))
         goto err;
 #endif                          /* OPENSSL_NO_SRP */
     /* Flags defaults to zero which is fine */
     ret->flags = as->flags;

     M_ASN1_free_of(as, SSL_SESSION_ASN1);

     if ((a != NULL) && (*a == NULL))
         *a = ret;
     *pp = p;
     return ret;

     err:
     M_ASN1_free_of(as, SSL_SESSION_ASN1);
     if ((a == NULL) || (*a != ret))
         SSL_SESSION_free(ret);
     return NULL;
 }
	/* 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 2005 Nokia. All rights reserved.
	*
	* The portions of the attached software ("Contribution") is developed by
	* Nokia Corporation and is licensed pursuant to the OpenSSL open source
	* license.
	*
	* The Contribution, originally written by Mika Kousa and Pasi Eronen of
	* Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
	* support (see RFC 4279) to OpenSSL.
	*
	* No patent licenses or other rights except those expressly stated in
	* the OpenSSL open source license shall be deemed granted or received
	* expressly, by implication, estoppel, or otherwise.
	*
	* No assurances are provided by Nokia that the Contribution does not
	* infringe the patent or other intellectual property rights of any third
	* party or that the license provides you with all the necessary rights
	* to make use of the Contribution.
	*
	* THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
	* ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
	* SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
	* OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
	* OTHERWISE.
	*/

	#include <stdio.h>
	#include <stdlib.h>
	#include "ssl_locl.h"
	#include <openssl/asn1t.h>
	#include <openssl/x509.h>

	typedef struct {
	long version;
	long ssl_version;
	ASN1_OCTET_STRING *cipher;
	ASN1_OCTET_STRING *comp_id;
	ASN1_OCTET_STRING *master_key;
	ASN1_OCTET_STRING *session_id;
	ASN1_OCTET_STRING *key_arg;
	long time;
	long timeout;
	X509 *peer;
	ASN1_OCTET_STRING *session_id_context;
	long verify_result;
	ASN1_OCTET_STRING *tlsext_hostname;
	long tlsext_tick_lifetime_hint;
	ASN1_OCTET_STRING *tlsext_tick;
	#ifndef OPENSSL_NO_PSK
	ASN1_OCTET_STRING *psk_identity_hint;
	ASN1_OCTET_STRING *psk_identity;
	#endif
	#ifndef OPENSSL_NO_SRP
	ASN1_OCTET_STRING *srp_username;
	#endif
	long flags;
	} SSL_SESSION_ASN1;

	ASN1_SEQUENCE(SSL_SESSION_ASN1) = {
	ASN1_SIMPLE(SSL_SESSION_ASN1, version, LONG),
	ASN1_SIMPLE(SSL_SESSION_ASN1, ssl_version, LONG),
	ASN1_SIMPLE(SSL_SESSION_ASN1, cipher, ASN1_OCTET_STRING),
	ASN1_SIMPLE(SSL_SESSION_ASN1, session_id, ASN1_OCTET_STRING),
	ASN1_SIMPLE(SSL_SESSION_ASN1, master_key, ASN1_OCTET_STRING),
	ASN1_IMP_OPT(SSL_SESSION_ASN1, key_arg, ASN1_OCTET_STRING, 0),
	ASN1_EXP_OPT(SSL_SESSION_ASN1, time, ZLONG, 1),
	ASN1_EXP_OPT(SSL_SESSION_ASN1, timeout, ZLONG, 2),
	ASN1_EXP_OPT(SSL_SESSION_ASN1, peer, X509, 3),
	ASN1_EXP_OPT(SSL_SESSION_ASN1, session_id_context, ASN1_OCTET_STRING, 4),
	ASN1_EXP_OPT(SSL_SESSION_ASN1, verify_result, ZLONG, 5),
	ASN1_EXP_OPT(SSL_SESSION_ASN1, tlsext_hostname, ASN1_OCTET_STRING, 6),
	#ifndef OPENSSL_NO_PSK
	ASN1_EXP_OPT(SSL_SESSION_ASN1, psk_identity_hint, ASN1_OCTET_STRING, 7),
	ASN1_EXP_OPT(SSL_SESSION_ASN1, psk_identity, ASN1_OCTET_STRING, 8),
	#endif
	ASN1_EXP_OPT(SSL_SESSION_ASN1, tlsext_tick_lifetime_hint, ZLONG, 9),
	ASN1_EXP_OPT(SSL_SESSION_ASN1, tlsext_tick, ASN1_OCTET_STRING, 10),
	ASN1_EXP_OPT(SSL_SESSION_ASN1, comp_id, ASN1_OCTET_STRING, 11),
	#ifndef OPENSSL_NO_SRP
	ASN1_EXP_OPT(SSL_SESSION_ASN1, srp_username, ASN1_OCTET_STRING, 12),
	#endif
	ASN1_EXP_OPT(SSL_SESSION_ASN1, flags, ZLONG, 13)
	} static_ASN1_SEQUENCE_END(SSL_SESSION_ASN1)

	IMPLEMENT_STATIC_ASN1_ENCODE_FUNCTIONS(SSL_SESSION_ASN1)

	/* Utility functions for i2d_SSL_SESSION */

	/* Initialise OCTET STRING from buffer and length */

	static void ssl_session_oinit(ASN1_OCTET_STRING *dest, ASN1_OCTET_STRING os,
	unsigned char *data, size_t len)
	{
	os->data = data;
	os->length = len;
	os->flags = 0;
	*dest = os;
	}

	/* Initialise OCTET STRING from string */
	static void ssl_session_sinit(ASN1_OCTET_STRING *dest, ASN1_OCTET_STRING os,
	char *data)
	{
	if (data != NULL)
	ssl_session_oinit(dest, os, (unsigned char *)data, strlen(data));
	else
	*dest = NULL;
	}

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

	SSL_SESSION_ASN1 as;

	ASN1_OCTET_STRING cipher;
	unsigned char cipher_data[2];
	ASN1_OCTET_STRING master_key, session_id, sid_ctx;

	#ifndef OPENSSL_NO_COMP
	ASN1_OCTET_STRING comp_id;
	unsigned char comp_id_data;
	#endif

	ASN1_OCTET_STRING tlsext_hostname, tlsext_tick;

	#ifndef OPENSSL_NO_SRP
	ASN1_OCTET_STRING srp_username;
	#endif

	#ifndef OPENSSL_NO_PSK
	ASN1_OCTET_STRING psk_identity, psk_identity_hint;
	#endif

	long l;

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

	memset(&as, 0, sizeof(as));

	as.version = SSL_SESSION_ASN1_VERSION;
	as.ssl_version = in->ssl_version;

	if (in->cipher == NULL)
	l = in->cipher_id;
	else
	l = in->cipher->id;
	cipher_data[0] = ((unsigned char)(l >> 8L)) & 0xff;
	cipher_data[1] = ((unsigned char)(l)) & 0xff;

	ssl_session_oinit(&as.cipher, &cipher, cipher_data, 2);

	#ifndef OPENSSL_NO_COMP
	if (in->compress_meth) {
	comp_id_data = (unsigned char)in->compress_meth;
	ssl_session_oinit(&as.comp_id, &comp_id, &comp_id_data, 1);
	}
	#endif

	ssl_session_oinit(&as.master_key, &master_key,
	in->master_key, in->master_key_length);

	ssl_session_oinit(&as.session_id, &session_id,
	in->session_id, in->session_id_length);

	ssl_session_oinit(&as.session_id_context, &sid_ctx,
	in->sid_ctx, in->sid_ctx_length);

	as.time = in->time;
	as.timeout = in->timeout;
	as.verify_result = in->verify_result;

	as.peer = in->peer;

	ssl_session_sinit(&as.tlsext_hostname, &tlsext_hostname,
	in->tlsext_hostname);
	if (in->tlsext_tick) {
	ssl_session_oinit(&as.tlsext_tick, &tlsext_tick,
	in->tlsext_tick, in->tlsext_ticklen);
	}
	if (in->tlsext_tick_lifetime_hint > 0)
	as.tlsext_tick_lifetime_hint = in->tlsext_tick_lifetime_hint;
	#ifndef OPENSSL_NO_PSK
	ssl_session_sinit(&as.psk_identity_hint, &psk_identity_hint,
	in->psk_identity_hint);
	ssl_session_sinit(&as.psk_identity, &psk_identity, in->psk_identity);
	#endif /* OPENSSL_NO_PSK */
	#ifndef OPENSSL_NO_SRP
	ssl_session_sinit(&as.srp_username, &srp_username, in->srp_username);
	#endif /* OPENSSL_NO_SRP */

	as.flags = in->flags;

	return i2d_SSL_SESSION_ASN1(&as, pp);

	}

	/* Utility functions for d2i_SSL_SESSION */

	/* OPENSSL_strndup an OCTET STRING */

	static int ssl_session_strndup(char *pdst, ASN1_OCTET_STRING src)
	{
	OPENSSL_free(*pdst);
	*pdst = NULL;
	if (src == NULL)
	return 1;
	pdst = OPENSSL_strndup((char )src->data, src->length);
	if (*pdst == NULL)
	return 0;
	return 1;
	}

	/* Copy an OCTET STRING, return error if it exceeds maximum length */

	static int ssl_session_memcpy(unsigned char dst, unsigned int pdstlen,
	ASN1_OCTET_STRING *src, int maxlen)
	{
	if (src == NULL) {
	*pdstlen = 0;
	return 1;
	}
	if (src->length > maxlen)
	return 0;
	memcpy(dst, src->data, src->length);
	*pdstlen = src->length;
	return 1;
	}

	SSL_SESSION d2i_SSL_SESSION(SSL_SESSION a, const unsigned char *pp,
	long length)
	{
	long id;
	unsigned int tmpl;
	const unsigned char p = pp;
	SSL_SESSION_ASN1 *as = NULL;
	SSL_SESSION *ret = NULL;

	as = d2i_SSL_SESSION_ASN1(NULL, &p, length);
	/* ASN.1 code returns suitable error */
	if (as == NULL)
	goto err;

	if (!a \|\| !*a) {
	ret = SSL_SESSION_new();
	if (ret == NULL)
	goto err;
	} else {
	ret = *a;
	}

	if (as->version != SSL_SESSION_ASN1_VERSION) {
	SSLerr(SSL_F_D2I_SSL_SESSION, SSL_R_UNKNOWN_SSL_VERSION);
	goto err;
	}

	if ((as->ssl_version >> 8) != SSL3_VERSION_MAJOR
	&& (as->ssl_version >> 8) != DTLS1_VERSION_MAJOR
	&& as->ssl_version != DTLS1_BAD_VER) {
	SSLerr(SSL_F_D2I_SSL_SESSION, SSL_R_UNSUPPORTED_SSL_VERSION);
	goto err;
	}

	ret->ssl_version = (int)as->ssl_version;

	if (as->cipher->length != 2) {
	SSLerr(SSL_F_D2I_SSL_SESSION, SSL_R_CIPHER_CODE_WRONG_LENGTH);
	goto err;
	}

	p = as->cipher->data;
	id = 0x03000000L \| ((unsigned long)p[0] << 8L) \| (unsigned long)p[1];

	ret->cipher = NULL;
	ret->cipher_id = id;

	if (!ssl_session_memcpy(ret->session_id, &ret->session_id_length,
	as->session_id, SSL3_MAX_SSL_SESSION_ID_LENGTH))
	goto err;

	if (!ssl_session_memcpy(ret->master_key, &tmpl,
	as->master_key, SSL_MAX_MASTER_KEY_LENGTH))
	goto err;

	ret->master_key_length = tmpl;

	if (as->time != 0)
	ret->time = as->time;
	else
	ret->time = (unsigned long)time(NULL);

	if (as->timeout != 0)
	ret->timeout = as->timeout;
	else
	ret->timeout = 3;

	X509_free(ret->peer);
	ret->peer = as->peer;
	as->peer = NULL;

	if (!ssl_session_memcpy(ret->sid_ctx, &ret->sid_ctx_length,
	as->session_id_context, SSL_MAX_SID_CTX_LENGTH))
	goto err;

	/* NB: this defaults to zero which is X509_V_OK */
	ret->verify_result = as->verify_result;

	if (!ssl_session_strndup(&ret->tlsext_hostname, as->tlsext_hostname))
	goto err;

	#ifndef OPENSSL_NO_PSK
	if (!ssl_session_strndup(&ret->psk_identity_hint, as->psk_identity_hint))
	goto err;
	if (!ssl_session_strndup(&ret->psk_identity, as->psk_identity))
	goto err;
	#endif

	ret->tlsext_tick_lifetime_hint = as->tlsext_tick_lifetime_hint;
	if (as->tlsext_tick) {
	ret->tlsext_tick = as->tlsext_tick->data;
	ret->tlsext_ticklen = as->tlsext_tick->length;
	as->tlsext_tick->data = NULL;
	} else {
	ret->tlsext_tick = NULL;
	}
	#ifndef OPENSSL_NO_COMP
	if (as->comp_id) {
	if (as->comp_id->length != 1) {
	SSLerr(SSL_F_D2I_SSL_SESSION, SSL_R_BAD_LENGTH);
	goto err;
	}
	ret->compress_meth = as->comp_id->data[0];
	} else {
	ret->compress_meth = 0;
	}
	#endif

	#ifndef OPENSSL_NO_SRP
	if (!ssl_session_strndup(&ret->srp_username, as->srp_username))
	goto err;
	#endif /* OPENSSL_NO_SRP */
	/* Flags defaults to zero which is fine */
	ret->flags = as->flags;

	M_ASN1_free_of(as, SSL_SESSION_ASN1);

	if ((a != NULL) && (*a == NULL))
	*a = ret;
	*pp = p;
	return ret;

	err:
	M_ASN1_free_of(as, SSL_SESSION_ASN1);
	if ((a == NULL) \|\| (*a != ret))
	SSL_SESSION_free(ret);
	return NULL;
	}