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

 /*
  * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
  * Copyright 2005 Nokia. All rights reserved.
  *
  * Licensed under the Apache License 2.0 (the "License").  You may not use
  * this file except in compliance with the License.  You can obtain a copy
  * in the file LICENSE in the source distribution or at
  * https://www.openssl.org/source/license.html
  */

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

 typedef struct {
     uint32_t version;
     int32_t 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;
     int64_t time;
     int64_t timeout;
     X509 *peer;
     ASN1_OCTET_STRING *session_id_context;
     int32_t verify_result;
     ASN1_OCTET_STRING *tlsext_hostname;
     uint64_t tlsext_tick_lifetime_hint;
     uint32_t tlsext_tick_age_add;
     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
     uint64_t flags;
     uint32_t max_early_data;
     ASN1_OCTET_STRING *alpn_selected;
     uint32_t tlsext_max_fragment_len_mode;
     ASN1_OCTET_STRING *ticket_appdata;
 } SSL_SESSION_ASN1;

 ASN1_SEQUENCE(SSL_SESSION_ASN1) = {
     ASN1_EMBED(SSL_SESSION_ASN1, version, UINT32),
     ASN1_EMBED(SSL_SESSION_ASN1, ssl_version, INT32),
     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_EMBED(SSL_SESSION_ASN1, time, ZINT64, 1),
     ASN1_EXP_OPT_EMBED(SSL_SESSION_ASN1, timeout, ZINT64, 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_EMBED(SSL_SESSION_ASN1, verify_result, ZINT32, 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_EMBED(SSL_SESSION_ASN1, tlsext_tick_lifetime_hint, ZUINT64, 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_EMBED(SSL_SESSION_ASN1, flags, ZUINT64, 13),
     ASN1_EXP_OPT_EMBED(SSL_SESSION_ASN1, tlsext_tick_age_add, ZUINT32, 14),
     ASN1_EXP_OPT_EMBED(SSL_SESSION_ASN1, max_early_data, ZUINT32, 15),
     ASN1_EXP_OPT(SSL_SESSION_ASN1, alpn_selected, ASN1_OCTET_STRING, 16),
     ASN1_EXP_OPT_EMBED(SSL_SESSION_ASN1, tlsext_max_fragment_len_mode, ZUINT32, 17),
     ASN1_EXP_OPT(SSL_SESSION_ASN1, ticket_appdata, ASN1_OCTET_STRING, 18)
 } 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,
                               const unsigned char *data, size_t len)
 {
     os->data = (unsigned char *)data; /* justified cast: data is not modified */
     os->length = (int)len;
     os->flags = 0;
     *dest = os;
 }

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

 int i2d_SSL_SESSION(const 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
     ASN1_OCTET_STRING alpn_selected;
     ASN1_OCTET_STRING ticket_appdata;

     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->ext.hostname);
     if (in->ext.tick) {
         ssl_session_oinit(&as.tlsext_tick, &tlsext_tick,
                           in->ext.tick, in->ext.ticklen);
     }
     if (in->ext.tick_lifetime_hint > 0)
         as.tlsext_tick_lifetime_hint = in->ext.tick_lifetime_hint;
     as.tlsext_tick_age_add = in->ext.tick_age_add;
 #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;
     as.max_early_data = in->ext.max_early_data;

     if (in->ext.alpn_selected == NULL)
         as.alpn_selected = NULL;
     else
         ssl_session_oinit(&as.alpn_selected, &alpn_selected,
                           in->ext.alpn_selected, in->ext.alpn_selected_len);

     as.tlsext_max_fragment_len_mode = in->ext.max_fragment_len_mode;

     if (in->ticket_appdata == NULL)
         as.ticket_appdata = NULL;
     else
         ssl_session_oinit(&as.ticket_appdata, &ticket_appdata,
                           in->ticket_appdata, in->ticket_appdata_len);

     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, size_t *pdstlen,
                               ASN1_OCTET_STRING *src, size_t maxlen)
 {
     if (src == NULL) {
         *pdstlen = 0;
         return 1;
     }
     if (src->length < 0 || src->length > (int)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;
     size_t 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;
     }

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

     ret->cipher_id = id;
     ret->cipher = ssl3_get_cipher_by_id(id);
     if (ret->cipher == NULL)
         goto err;

     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, TLS13_MAX_RESUMPTION_PSK_LENGTH))
         goto err;

     ret->master_key_length = tmpl;

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

     if (as->timeout != 0)
         ret->timeout = (long)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->ext.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->ext.tick_lifetime_hint = (unsigned long)as->tlsext_tick_lifetime_hint;
     ret->ext.tick_age_add = as->tlsext_tick_age_add;
     OPENSSL_free(ret->ext.tick);
     if (as->tlsext_tick != NULL) {
         ret->ext.tick = as->tlsext_tick->data;
         ret->ext.ticklen = as->tlsext_tick->length;
         as->tlsext_tick->data = NULL;
     } else {
         ret->ext.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 = (int32_t)as->flags;
     ret->ext.max_early_data = as->max_early_data;

     OPENSSL_free(ret->ext.alpn_selected);
     if (as->alpn_selected != NULL) {
         ret->ext.alpn_selected = as->alpn_selected->data;
         ret->ext.alpn_selected_len = as->alpn_selected->length;
         as->alpn_selected->data = NULL;
     } else {
         ret->ext.alpn_selected = NULL;
         ret->ext.alpn_selected_len = 0;
     }

     ret->ext.max_fragment_len_mode = as->tlsext_max_fragment_len_mode;

     OPENSSL_free(ret->ticket_appdata);
     if (as->ticket_appdata != NULL) {
         ret->ticket_appdata = as->ticket_appdata->data;
         ret->ticket_appdata_len = as->ticket_appdata->length;
         as->ticket_appdata->data = NULL;
     } else {
         ret->ticket_appdata = NULL;
         ret->ticket_appdata_len = 0;
     }

     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 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
	* Copyright 2005 Nokia. All rights reserved.
	*
	* Licensed under the Apache License 2.0 (the "License"). You may not use
	* this file except in compliance with the License. You can obtain a copy
	* in the file LICENSE in the source distribution or at
	* https://www.openssl.org/source/license.html
	*/

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

	typedef struct {
	uint32_t version;
	int32_t 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;
	int64_t time;
	int64_t timeout;
	X509 *peer;
	ASN1_OCTET_STRING *session_id_context;
	int32_t verify_result;
	ASN1_OCTET_STRING *tlsext_hostname;
	uint64_t tlsext_tick_lifetime_hint;
	uint32_t tlsext_tick_age_add;
	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
	uint64_t flags;
	uint32_t max_early_data;
	ASN1_OCTET_STRING *alpn_selected;
	uint32_t tlsext_max_fragment_len_mode;
	ASN1_OCTET_STRING *ticket_appdata;
	} SSL_SESSION_ASN1;

	ASN1_SEQUENCE(SSL_SESSION_ASN1) = {
	ASN1_EMBED(SSL_SESSION_ASN1, version, UINT32),
	ASN1_EMBED(SSL_SESSION_ASN1, ssl_version, INT32),
	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_EMBED(SSL_SESSION_ASN1, time, ZINT64, 1),
	ASN1_EXP_OPT_EMBED(SSL_SESSION_ASN1, timeout, ZINT64, 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_EMBED(SSL_SESSION_ASN1, verify_result, ZINT32, 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_EMBED(SSL_SESSION_ASN1, tlsext_tick_lifetime_hint, ZUINT64, 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_EMBED(SSL_SESSION_ASN1, flags, ZUINT64, 13),
	ASN1_EXP_OPT_EMBED(SSL_SESSION_ASN1, tlsext_tick_age_add, ZUINT32, 14),
	ASN1_EXP_OPT_EMBED(SSL_SESSION_ASN1, max_early_data, ZUINT32, 15),
	ASN1_EXP_OPT(SSL_SESSION_ASN1, alpn_selected, ASN1_OCTET_STRING, 16),
	ASN1_EXP_OPT_EMBED(SSL_SESSION_ASN1, tlsext_max_fragment_len_mode, ZUINT32, 17),
	ASN1_EXP_OPT(SSL_SESSION_ASN1, ticket_appdata, ASN1_OCTET_STRING, 18)
	} 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,
	const unsigned char *data, size_t len)
	{
	os->data = (unsigned char )data; / justified cast: data is not modified */
	os->length = (int)len;
	os->flags = 0;
	*dest = os;
	}

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

	int i2d_SSL_SESSION(const 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
	ASN1_OCTET_STRING alpn_selected;
	ASN1_OCTET_STRING ticket_appdata;

	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->ext.hostname);
	if (in->ext.tick) {
	ssl_session_oinit(&as.tlsext_tick, &tlsext_tick,
	in->ext.tick, in->ext.ticklen);
	}
	if (in->ext.tick_lifetime_hint > 0)
	as.tlsext_tick_lifetime_hint = in->ext.tick_lifetime_hint;
	as.tlsext_tick_age_add = in->ext.tick_age_add;
	#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;
	as.max_early_data = in->ext.max_early_data;

	if (in->ext.alpn_selected == NULL)
	as.alpn_selected = NULL;
	else
	ssl_session_oinit(&as.alpn_selected, &alpn_selected,
	in->ext.alpn_selected, in->ext.alpn_selected_len);

	as.tlsext_max_fragment_len_mode = in->ext.max_fragment_len_mode;

	if (in->ticket_appdata == NULL)
	as.ticket_appdata = NULL;
	else
	ssl_session_oinit(&as.ticket_appdata, &ticket_appdata,
	in->ticket_appdata, in->ticket_appdata_len);

	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, size_t pdstlen,
	ASN1_OCTET_STRING *src, size_t maxlen)
	{
	if (src == NULL) {
	*pdstlen = 0;
	return 1;
	}
	if (src->length < 0 \|\| src->length > (int)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;
	size_t 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;
	}

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

	ret->cipher_id = id;
	ret->cipher = ssl3_get_cipher_by_id(id);
	if (ret->cipher == NULL)
	goto err;

	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, TLS13_MAX_RESUMPTION_PSK_LENGTH))
	goto err;

	ret->master_key_length = tmpl;

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

	if (as->timeout != 0)
	ret->timeout = (long)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->ext.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->ext.tick_lifetime_hint = (unsigned long)as->tlsext_tick_lifetime_hint;
	ret->ext.tick_age_add = as->tlsext_tick_age_add;
	OPENSSL_free(ret->ext.tick);
	if (as->tlsext_tick != NULL) {
	ret->ext.tick = as->tlsext_tick->data;
	ret->ext.ticklen = as->tlsext_tick->length;
	as->tlsext_tick->data = NULL;
	} else {
	ret->ext.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 = (int32_t)as->flags;
	ret->ext.max_early_data = as->max_early_data;

	OPENSSL_free(ret->ext.alpn_selected);
	if (as->alpn_selected != NULL) {
	ret->ext.alpn_selected = as->alpn_selected->data;
	ret->ext.alpn_selected_len = as->alpn_selected->length;
	as->alpn_selected->data = NULL;
	} else {
	ret->ext.alpn_selected = NULL;
	ret->ext.alpn_selected_len = 0;
	}

	ret->ext.max_fragment_len_mode = as->tlsext_max_fragment_len_mode;

	OPENSSL_free(ret->ticket_appdata);
	if (as->ticket_appdata != NULL) {
	ret->ticket_appdata = as->ticket_appdata->data;
	ret->ticket_appdata_len = as->ticket_appdata->length;
	as->ticket_appdata->data = NULL;
	} else {
	ret->ticket_appdata = NULL;
	ret->ticket_appdata_len = 0;
	}

	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;
	}