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8be79a3355
boringssl/ssl/ssl_asn1.c
David Benjamin 8be79a3355 Slightly refactor SSL_SESSION parsing. 
Rather than parse the fields in two passes, group the code relating to
one field together. Somewhat less annoying to add new fields. To keep
this from getting too unwieldy, add a few more helper functions for the
common field types.

Change-Id: Ia86c6bbca9dd212d5c35029363ea4d6b6426164a
Reviewed-on: https://boringssl-review.googlesource.com/5758
Reviewed-by: Adam Langley <agl@google.com>
2015-08-28 22:18:17 +00:00

650 lines
23 KiB
C
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/* 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 <limits.h>
#include <string.h>
#include <openssl/bytestring.h>
#include <openssl/err.h>
#include <openssl/mem.h>
#include <openssl/x509.h>
#include "internal.h"
/* An SSL_SESSION is serialized as the following ASN.1 structure:
*
* SSLSession ::= SEQUENCE {
* version INTEGER (1), -- ignored
* sslVersion INTEGER, -- protocol version number
* cipher OCTET STRING, -- two bytes long
* sessionID OCTET STRING,
* masterKey OCTET STRING,
* time [1] INTEGER OPTIONAL, -- seconds since UNIX epoch
* timeout [2] INTEGER OPTIONAL, -- in seconds
* peer [3] Certificate OPTIONAL,
* sessionIDContext [4] OCTET STRING OPTIONAL,
* verifyResult [5] INTEGER OPTIONAL, -- one of X509_V_* codes
* hostName [6] OCTET STRING OPTIONAL,
* -- from server_name extension
* pskIdentity [8] OCTET STRING OPTIONAL,
* ticketLifetimeHint [9] INTEGER OPTIONAL, -- client-only
* ticket [10] OCTET STRING OPTIONAL, -- client-only
* peerSHA256 [13] OCTET STRING OPTIONAL,
* originalHandshakeHash [14] OCTET STRING OPTIONAL,
* signedCertTimestampList [15] OCTET STRING OPTIONAL,
* -- contents of SCT extension
* ocspResponse [16] OCTET STRING OPTIONAL,
* -- stapled OCSP response from the server
* extendedMasterSecret [17] BOOLEAN OPTIONAL,
* keyExchangeInfo [18] INTEGER OPTIONAL,
* }
*
* Note: historically this serialization has included other optional
* fields. Their presense is currently treated as a parse error:
*
* keyArg [0] IMPLICIT OCTET STRING OPTIONAL,
* pskIdentityHint [7] OCTET STRING OPTIONAL,
* compressionMethod [11] OCTET STRING OPTIONAL,
* srpUsername [12] OCTET STRING OPTIONAL, */
static const int kTimeTag =
CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 1;
static const int kTimeoutTag =
CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 2;
static const int kPeerTag =
CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 3;
static const int kSessionIDContextTag =
CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 4;
static const int kVerifyResultTag =
CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 5;
static const int kHostNameTag =
CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 6;
static const int kPSKIdentityTag =
CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 8;
static const int kTicketLifetimeHintTag =
CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 9;
static const int kTicketTag =
CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 10;
static const int kPeerSHA256Tag =
CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 13;
static const int kOriginalHandshakeHashTag =
CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 14;
static const int kSignedCertTimestampListTag =
CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 15;
static const int kOCSPResponseTag =
CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 16;
static const int kExtendedMasterSecretTag =
CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 17;
static const int kKeyExchangeInfoTag =
CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 18;
static int SSL_SESSION_to_bytes_full(SSL_SESSION *in, uint8_t **out_data,
size_t *out_len, int for_ticket) {
CBB cbb, session, child, child2;
if (in == NULL || in->cipher == NULL) {
return 0;
}
CBB_zero(&cbb);
if (!CBB_init(&cbb, 0) ||
!CBB_add_asn1(&cbb, &session, CBS_ASN1_SEQUENCE) ||
!CBB_add_asn1_uint64(&session, SSL_SESSION_ASN1_VERSION) ||
!CBB_add_asn1_uint64(&session, in->ssl_version) ||
!CBB_add_asn1(&session, &child, CBS_ASN1_OCTETSTRING) ||
!CBB_add_u16(&child, (uint16_t)(in->cipher->id & 0xffff)) ||
!CBB_add_asn1(&session, &child, CBS_ASN1_OCTETSTRING) ||
/* The session ID is irrelevant for a session ticket. */
!CBB_add_bytes(&child, in->session_id,
for_ticket ? 0 : in->session_id_length) ||
!CBB_add_asn1(&session, &child, CBS_ASN1_OCTETSTRING) ||
!CBB_add_bytes(&child, in->master_key, in->master_key_length)) {
OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
goto err;
}
if (in->time != 0) {
if (!CBB_add_asn1(&session, &child, kTimeTag) ||
!CBB_add_asn1_uint64(&child, in->time)) {
OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
goto err;
}
}
if (in->timeout != 0) {
if (!CBB_add_asn1(&session, &child, kTimeoutTag) ||
!CBB_add_asn1_uint64(&child, in->timeout)) {
OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
goto err;
}
}
/* The peer certificate is only serialized if the SHA-256 isn't
* serialized instead. */
if (in->peer && !in->peer_sha256_valid) {
uint8_t *buf;
int len = i2d_X509(in->peer, NULL);
if (len < 0) {
goto err;
}
if (!CBB_add_asn1(&session, &child, kPeerTag) ||
!CBB_add_space(&child, &buf, len)) {
OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
goto err;
}
if (buf != NULL && i2d_X509(in->peer, &buf) < 0) {
goto err;
}
}
/* Although it is OPTIONAL and usually empty, OpenSSL has
* historically always encoded the sid_ctx. */
if (!CBB_add_asn1(&session, &child, kSessionIDContextTag) ||
!CBB_add_asn1(&child, &child2, CBS_ASN1_OCTETSTRING) ||
!CBB_add_bytes(&child2, in->sid_ctx, in->sid_ctx_length)) {
OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
goto err;
}
if (in->verify_result != X509_V_OK) {
if (!CBB_add_asn1(&session, &child, kVerifyResultTag) ||
!CBB_add_asn1_uint64(&child, in->verify_result)) {
OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
goto err;
}
}
if (in->tlsext_hostname) {
if (!CBB_add_asn1(&session, &child, kHostNameTag) ||
!CBB_add_asn1(&child, &child2, CBS_ASN1_OCTETSTRING) ||
!CBB_add_bytes(&child2, (const uint8_t *)in->tlsext_hostname,
strlen(in->tlsext_hostname))) {
OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
goto err;
}
}
if (in->psk_identity) {
if (!CBB_add_asn1(&session, &child, kPSKIdentityTag) ||
!CBB_add_asn1(&child, &child2, CBS_ASN1_OCTETSTRING) ||
!CBB_add_bytes(&child2, (const uint8_t *)in->psk_identity,
strlen(in->psk_identity))) {
OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
goto err;
}
}
if (in->tlsext_tick_lifetime_hint > 0) {
if (!CBB_add_asn1(&session, &child, kTicketLifetimeHintTag) ||
!CBB_add_asn1_uint64(&child, in->tlsext_tick_lifetime_hint)) {
OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
goto err;
}
}
if (in->tlsext_tick && !for_ticket) {
if (!CBB_add_asn1(&session, &child, kTicketTag) ||
!CBB_add_asn1(&child, &child2, CBS_ASN1_OCTETSTRING) ||
!CBB_add_bytes(&child2, in->tlsext_tick, in->tlsext_ticklen)) {
OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
goto err;
}
}
if (in->peer_sha256_valid) {
if (!CBB_add_asn1(&session, &child, kPeerSHA256Tag) ||
!CBB_add_asn1(&child, &child2, CBS_ASN1_OCTETSTRING) ||
!CBB_add_bytes(&child2, in->peer_sha256, sizeof(in->peer_sha256))) {
OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
goto err;
}
}
if (in->original_handshake_hash_len > 0) {
if (!CBB_add_asn1(&session, &child, kOriginalHandshakeHashTag) ||
!CBB_add_asn1(&child, &child2, CBS_ASN1_OCTETSTRING) ||
!CBB_add_bytes(&child2, in->original_handshake_hash,
in->original_handshake_hash_len)) {
OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
goto err;
}
}
if (in->tlsext_signed_cert_timestamp_list_length > 0) {
if (!CBB_add_asn1(&session, &child, kSignedCertTimestampListTag) ||
!CBB_add_asn1(&child, &child2, CBS_ASN1_OCTETSTRING) ||
!CBB_add_bytes(&child2, in->tlsext_signed_cert_timestamp_list,
in->tlsext_signed_cert_timestamp_list_length)) {
OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
goto err;
}
}
if (in->ocsp_response_length > 0) {
if (!CBB_add_asn1(&session, &child, kOCSPResponseTag) ||
!CBB_add_asn1(&child, &child2, CBS_ASN1_OCTETSTRING) ||
!CBB_add_bytes(&child2, in->ocsp_response, in->ocsp_response_length)) {
OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
goto err;
}
}
if (in->extended_master_secret) {
if (!CBB_add_asn1(&session, &child, kExtendedMasterSecretTag) ||
!CBB_add_asn1(&child, &child2, CBS_ASN1_BOOLEAN) ||
!CBB_add_u8(&child2, 0xff)) {
OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
goto err;
}
}
if (in->key_exchange_info > 0 &&
(!CBB_add_asn1(&session, &child, kKeyExchangeInfoTag) ||
!CBB_add_asn1_uint64(&child, in->key_exchange_info))) {
OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
goto err;
}
if (!CBB_finish(&cbb, out_data, out_len)) {
OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
goto err;
}
return 1;
err:
CBB_cleanup(&cbb);
return 0;
}
int SSL_SESSION_to_bytes(SSL_SESSION *in, uint8_t **out_data, size_t *out_len) {
return SSL_SESSION_to_bytes_full(in, out_data, out_len, 0);
}
int SSL_SESSION_to_bytes_for_ticket(SSL_SESSION *in, uint8_t **out_data,
size_t *out_len) {
return SSL_SESSION_to_bytes_full(in, out_data, out_len, 1);
}
int i2d_SSL_SESSION(SSL_SESSION *in, uint8_t **pp) {
uint8_t *out;
size_t len;
if (!SSL_SESSION_to_bytes(in, &out, &len)) {
return -1;
}
if (len > INT_MAX) {
OPENSSL_free(out);
OPENSSL_PUT_ERROR(SSL, ERR_R_OVERFLOW);
return -1;
}
if (pp) {
memcpy(*pp, out, len);
*pp += len;
}
OPENSSL_free(out);
return len;
}
/* SSL_SESSION_parse_string gets an optional ASN.1 OCTET STRING
* explicitly tagged with |tag| from |cbs| and saves it in |*out|. On
* entry, if |*out| is not NULL, it frees the existing contents. If
* the element was not found, it sets |*out| to NULL. It returns one
* on success, whether or not the element was found, and zero on
* decode error. */
static int SSL_SESSION_parse_string(CBS *cbs, char **out, unsigned tag) {
CBS value;
int present;
if (!CBS_get_optional_asn1_octet_string(cbs, &value, &present, tag)) {
OPENSSL_PUT_ERROR(SSL, SSL_R_INVALID_SSL_SESSION);
return 0;
}
if (present) {
if (CBS_contains_zero_byte(&value)) {
OPENSSL_PUT_ERROR(SSL, SSL_R_INVALID_SSL_SESSION);
return 0;
}
if (!CBS_strdup(&value, out)) {
OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
return 0;
}
} else {
OPENSSL_free(*out);
*out = NULL;
}
return 1;
}
/* SSL_SESSION_parse_string gets an optional ASN.1 OCTET STRING
* explicitly tagged with |tag| from |cbs| and stows it in |*out_ptr|
* and |*out_len|. If |*out_ptr| is not NULL, it frees the existing
* contents. On entry, if the element was not found, it sets
* |*out_ptr| to NULL. It returns one on success, whether or not the
* element was found, and zero on decode error. */
static int SSL_SESSION_parse_octet_string(CBS *cbs, uint8_t **out_ptr,
size_t *out_len, unsigned tag) {
CBS value;
if (!CBS_get_optional_asn1_octet_string(cbs, &value, NULL, tag)) {
OPENSSL_PUT_ERROR(SSL, SSL_R_INVALID_SSL_SESSION);
return 0;
}
if (!CBS_stow(&value, out_ptr, out_len)) {
OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
return 0;
}
return 1;
}
/* SSL_SESSION_parse_bounded_octet_string parses an optional ASN.1 OCTET STRING
* explicitly tagged with |tag| of size at most |max_out|. */
static int SSL_SESSION_parse_bounded_octet_string(
CBS *cbs, uint8_t *out, unsigned *out_len, unsigned max_out, unsigned tag) {
CBS value;
if (!CBS_get_optional_asn1_octet_string(cbs, &value, NULL, tag) ||
CBS_len(&value) > max_out) {
OPENSSL_PUT_ERROR(SSL, SSL_R_INVALID_SSL_SESSION);
return 0;
}
memcpy(out, CBS_data(&value), CBS_len(&value));
*out_len = (unsigned)CBS_len(&value);
return 1;
}
static int SSL_SESSION_parse_long(CBS *cbs, long *out, unsigned tag,
long default_value) {
uint64_t value;
if (!CBS_get_optional_asn1_uint64(cbs, &value, tag,
(uint64_t)default_value) ||
value > LONG_MAX) {
OPENSSL_PUT_ERROR(SSL, SSL_R_INVALID_SSL_SESSION);
return 0;
}
*out = (long)value;
return 1;
}
static int SSL_SESSION_parse_u32(CBS *cbs, uint32_t *out, unsigned tag,
uint32_t default_value) {
uint64_t value;
if (!CBS_get_optional_asn1_uint64(cbs, &value, tag,
(uint64_t)default_value) ||
value > 0xffffffff) {
OPENSSL_PUT_ERROR(SSL, SSL_R_INVALID_SSL_SESSION);
return 0;
}
*out = (uint32_t)value;
return 1;
}
static X509 *parse_x509(CBS *cbs) {
const uint8_t *ptr = CBS_data(cbs);
X509 *ret = d2i_X509(NULL, &ptr, CBS_len(cbs));
if (ret == NULL) {
return NULL;
}
CBS_skip(cbs, ptr - CBS_data(cbs));
return ret;
}
static SSL_SESSION *SSL_SESSION_parse(CBS *cbs) {
SSL_SESSION *ret = SSL_SESSION_new();
if (ret == NULL) {
goto err;
}
CBS session;
uint64_t version, ssl_version;
if (!CBS_get_asn1(cbs, &session, CBS_ASN1_SEQUENCE) ||
!CBS_get_asn1_uint64(&session, &version) ||
version != SSL_SESSION_ASN1_VERSION ||
!CBS_get_asn1_uint64(&session, &ssl_version)) {
OPENSSL_PUT_ERROR(SSL, SSL_R_INVALID_SSL_SESSION);
goto err;
}
/* Only support SSLv3/TLS and DTLS. */
if ((ssl_version >> 8) != SSL3_VERSION_MAJOR &&
(ssl_version >> 8) != (DTLS1_VERSION >> 8)) {
OPENSSL_PUT_ERROR(SSL, SSL_R_UNKNOWN_SSL_VERSION);
goto err;
}
ret->ssl_version = ssl_version;
CBS cipher;
uint16_t cipher_value;
if (!CBS_get_asn1(&session, &cipher, CBS_ASN1_OCTETSTRING) ||
!CBS_get_u16(&cipher, &cipher_value) ||
CBS_len(&cipher) != 0) {
OPENSSL_PUT_ERROR(SSL, SSL_R_INVALID_SSL_SESSION);
goto err;
}
ret->cipher = SSL_get_cipher_by_value(cipher_value);
if (ret->cipher == NULL) {
OPENSSL_PUT_ERROR(SSL, SSL_R_UNSUPPORTED_CIPHER);
goto err;
}
CBS session_id, master_key;
if (!CBS_get_asn1(&session, &session_id, CBS_ASN1_OCTETSTRING) ||
CBS_len(&session_id) > SSL3_MAX_SSL_SESSION_ID_LENGTH ||
!CBS_get_asn1(&session, &master_key, CBS_ASN1_OCTETSTRING) ||
CBS_len(&master_key) > SSL_MAX_MASTER_KEY_LENGTH) {
OPENSSL_PUT_ERROR(SSL, SSL_R_INVALID_SSL_SESSION);
goto err;
}
memcpy(ret->session_id, CBS_data(&session_id), CBS_len(&session_id));
ret->session_id_length = CBS_len(&session_id);
memcpy(ret->master_key, CBS_data(&master_key), CBS_len(&master_key));
ret->master_key_length = CBS_len(&master_key);
if (!SSL_SESSION_parse_long(&session, &ret->time, kTimeTag, time(NULL)) ||
!SSL_SESSION_parse_long(&session, &ret->timeout, kTimeoutTag, 3)) {
OPENSSL_PUT_ERROR(SSL, SSL_R_INVALID_SSL_SESSION);
goto err;
}
CBS peer;
int has_peer;
if (!CBS_get_optional_asn1(&session, &peer, &has_peer, kPeerTag)) {
OPENSSL_PUT_ERROR(SSL, SSL_R_INVALID_SSL_SESSION);
goto err;
}
X509_free(ret->peer);
ret->peer = NULL;
if (has_peer) {
ret->peer = parse_x509(&peer);
if (ret->peer == NULL) {
goto err;
}
if (CBS_len(&peer) != 0) {
OPENSSL_PUT_ERROR(SSL, SSL_R_INVALID_SSL_SESSION);
goto err;
}
}
if (!SSL_SESSION_parse_bounded_octet_string(
&session, ret->sid_ctx, &ret->sid_ctx_length, sizeof(ret->sid_ctx),
kSessionIDContextTag) ||
!SSL_SESSION_parse_long(&session, &ret->verify_result, kVerifyResultTag,
X509_V_OK) ||
!SSL_SESSION_parse_string(&session, &ret->tlsext_hostname,
kHostNameTag) ||
!SSL_SESSION_parse_string(&session, &ret->psk_identity,
kPSKIdentityTag) ||
!SSL_SESSION_parse_u32(&session, &ret->tlsext_tick_lifetime_hint,
kTicketLifetimeHintTag, 0) ||
!SSL_SESSION_parse_octet_string(&session, &ret->tlsext_tick,
&ret->tlsext_ticklen, kTicketTag)) {
goto err;
}
if (CBS_peek_asn1_tag(&session, kPeerSHA256Tag)) {
CBS child, peer_sha256;
if (!CBS_get_asn1(&session, &child, kPeerSHA256Tag) ||
!CBS_get_asn1(&child, &peer_sha256, CBS_ASN1_OCTETSTRING) ||
CBS_len(&peer_sha256) != sizeof(ret->peer_sha256) ||
CBS_len(&child) != 0) {
OPENSSL_PUT_ERROR(SSL, SSL_R_INVALID_SSL_SESSION);
goto err;
}
memcpy(ret->peer_sha256, CBS_data(&peer_sha256), sizeof(ret->peer_sha256));
ret->peer_sha256_valid = 1;
} else {
ret->peer_sha256_valid = 0;
}
if (!SSL_SESSION_parse_bounded_octet_string(
&session, ret->original_handshake_hash,
&ret->original_handshake_hash_len,
sizeof(ret->original_handshake_hash), kOriginalHandshakeHashTag) ||
!SSL_SESSION_parse_octet_string(
&session, &ret->tlsext_signed_cert_timestamp_list,
&ret->tlsext_signed_cert_timestamp_list_length,
kSignedCertTimestampListTag) ||
!SSL_SESSION_parse_octet_string(
&session, &ret->ocsp_response, &ret->ocsp_response_length,
kOCSPResponseTag)) {
goto err;
}
int extended_master_secret;
if (!CBS_get_optional_asn1_bool(&session, &extended_master_secret,
kExtendedMasterSecretTag,
0 /* default to false */)) {
OPENSSL_PUT_ERROR(SSL, SSL_R_INVALID_SSL_SESSION);
goto err;
}
ret->extended_master_secret = !!extended_master_secret;
if (!SSL_SESSION_parse_u32(&session, &ret->key_exchange_info,
kKeyExchangeInfoTag, 0) ||
CBS_len(&session) != 0) {
OPENSSL_PUT_ERROR(SSL, SSL_R_INVALID_SSL_SESSION);
goto err;
}
return ret;
err:
SSL_SESSION_free(ret);
return NULL;
}
SSL_SESSION *SSL_SESSION_from_bytes(const uint8_t *in, size_t in_len) {
CBS cbs;
CBS_init(&cbs, in, in_len);
SSL_SESSION *ret = SSL_SESSION_parse(&cbs);
if (ret == NULL) {
return NULL;
}
if (CBS_len(&cbs) != 0) {
OPENSSL_PUT_ERROR(SSL, SSL_R_INVALID_SSL_SESSION);
SSL_SESSION_free(ret);
return NULL;
}
return ret;
}
SSL_SESSION *d2i_SSL_SESSION(SSL_SESSION **a, const uint8_t **pp, long length) {
if (length < 0) {
OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR);
return NULL;
}
CBS cbs;
CBS_init(&cbs, *pp, length);
SSL_SESSION *ret = SSL_SESSION_parse(&cbs);
if (ret == NULL) {
return NULL;
}
if (a) {
SSL_SESSION_free(*a);
*a = ret;
}
*pp = CBS_data(&cbs);
return ret;
}
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