|
- /* 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. */
-
- // Per C99, various stdint.h macros are unavailable in C++ unless some macros
- // are defined. C++11 overruled this decision, but older Android NDKs still
- // require it.
- #if !defined(__STDC_LIMIT_MACROS)
- #define __STDC_LIMIT_MACROS
- #endif
-
- #include <openssl/ssl.h>
-
- #include <limits.h>
- #include <string.h>
-
- #include <utility>
-
- #include <openssl/buf.h>
- #include <openssl/bytestring.h>
- #include <openssl/err.h>
- #include <openssl/mem.h>
- #include <openssl/x509.h>
-
- #include "../crypto/internal.h"
- #include "internal.h"
-
-
- namespace bssl {
-
- // An SSL_SESSION is serialized as the following ASN.1 structure:
- //
- // SSLSession ::= SEQUENCE {
- // version INTEGER (1), -- session structure version
- // sslVersion INTEGER, -- protocol version number
- // cipher OCTET STRING, -- two bytes long
- // sessionID OCTET STRING,
- // masterKey OCTET STRING,
- // time [1] INTEGER, -- seconds since UNIX epoch
- // timeout [2] INTEGER, -- in seconds
- // peer [3] Certificate OPTIONAL,
- // sessionIDContext [4] OCTET STRING OPTIONAL,
- // verifyResult [5] INTEGER OPTIONAL, -- one of X509_V_* codes
- // 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,
- // groupID [18] INTEGER OPTIONAL,
- // certChain [19] SEQUENCE OF Certificate OPTIONAL,
- // ticketAgeAdd [21] OCTET STRING OPTIONAL,
- // isServer [22] BOOLEAN DEFAULT TRUE,
- // peerSignatureAlgorithm [23] INTEGER OPTIONAL,
- // ticketMaxEarlyData [24] INTEGER OPTIONAL,
- // authTimeout [25] INTEGER OPTIONAL, -- defaults to timeout
- // earlyALPN [26] OCTET STRING OPTIONAL,
- // }
- //
- // Note: historically this serialization has included other optional
- // fields. Their presence is currently treated as a parse error, except for
- // hostName, which is ignored.
- //
- // keyArg [0] IMPLICIT OCTET STRING OPTIONAL,
- // hostName [6] OCTET STRING OPTIONAL,
- // pskIdentityHint [7] OCTET STRING OPTIONAL,
- // compressionMethod [11] OCTET STRING OPTIONAL,
- // srpUsername [12] OCTET STRING OPTIONAL,
- // ticketFlags [20] INTEGER OPTIONAL,
-
- static const unsigned kVersion = 1;
-
- static const unsigned kTimeTag =
- CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 1;
- static const unsigned kTimeoutTag =
- CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 2;
- static const unsigned kPeerTag =
- CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 3;
- static const unsigned kSessionIDContextTag =
- CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 4;
- static const unsigned kVerifyResultTag =
- CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 5;
- static const unsigned kHostNameTag =
- CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 6;
- static const unsigned kPSKIdentityTag =
- CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 8;
- static const unsigned kTicketLifetimeHintTag =
- CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 9;
- static const unsigned kTicketTag =
- CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 10;
- static const unsigned kPeerSHA256Tag =
- CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 13;
- static const unsigned kOriginalHandshakeHashTag =
- CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 14;
- static const unsigned kSignedCertTimestampListTag =
- CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 15;
- static const unsigned kOCSPResponseTag =
- CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 16;
- static const unsigned kExtendedMasterSecretTag =
- CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 17;
- static const unsigned kGroupIDTag =
- CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 18;
- static const unsigned kCertChainTag =
- CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 19;
- static const unsigned kTicketAgeAddTag =
- CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 21;
- static const unsigned kIsServerTag =
- CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 22;
- static const unsigned kPeerSignatureAlgorithmTag =
- CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 23;
- static const unsigned kTicketMaxEarlyDataTag =
- CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 24;
- static const unsigned kAuthTimeoutTag =
- CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 25;
- static const unsigned kEarlyALPNTag =
- CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 26;
-
- static int SSL_SESSION_to_bytes_full(const SSL_SESSION *in, CBB *cbb,
- int for_ticket) {
- if (in == NULL || in->cipher == NULL) {
- return 0;
- }
-
- CBB session, child, child2;
- if (!CBB_add_asn1(cbb, &session, CBS_ASN1_SEQUENCE) ||
- !CBB_add_asn1_uint64(&session, kVersion) ||
- !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)) ||
- // The session ID is irrelevant for a session ticket.
- !CBB_add_asn1_octet_string(&session, in->session_id,
- for_ticket ? 0 : in->session_id_length) ||
- !CBB_add_asn1_octet_string(&session, in->master_key,
- in->master_key_length) ||
- !CBB_add_asn1(&session, &child, kTimeTag) ||
- !CBB_add_asn1_uint64(&child, in->time) ||
- !CBB_add_asn1(&session, &child, kTimeoutTag) ||
- !CBB_add_asn1_uint64(&child, in->timeout)) {
- OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
- return 0;
- }
-
- // The peer certificate is only serialized if the SHA-256 isn't
- // serialized instead.
- if (sk_CRYPTO_BUFFER_num(in->certs) > 0 && !in->peer_sha256_valid) {
- const CRYPTO_BUFFER *buffer = sk_CRYPTO_BUFFER_value(in->certs, 0);
- if (!CBB_add_asn1(&session, &child, kPeerTag) ||
- !CBB_add_bytes(&child, CRYPTO_BUFFER_data(buffer),
- CRYPTO_BUFFER_len(buffer))) {
- OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
- return 0;
- }
- }
-
- // 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_octet_string(&child, in->sid_ctx, in->sid_ctx_length)) {
- OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
- return 0;
- }
-
- 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);
- return 0;
- }
- }
-
- if (in->psk_identity) {
- if (!CBB_add_asn1(&session, &child, kPSKIdentityTag) ||
- !CBB_add_asn1_octet_string(&child, (const uint8_t *)in->psk_identity,
- strlen(in->psk_identity))) {
- OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
- return 0;
- }
- }
-
- 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);
- return 0;
- }
- }
-
- if (in->tlsext_tick && !for_ticket) {
- if (!CBB_add_asn1(&session, &child, kTicketTag) ||
- !CBB_add_asn1_octet_string(&child, in->tlsext_tick,
- in->tlsext_ticklen)) {
- OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
- return 0;
- }
- }
-
- if (in->peer_sha256_valid) {
- if (!CBB_add_asn1(&session, &child, kPeerSHA256Tag) ||
- !CBB_add_asn1_octet_string(&child, in->peer_sha256,
- sizeof(in->peer_sha256))) {
- OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
- return 0;
- }
- }
-
- if (in->original_handshake_hash_len > 0) {
- if (!CBB_add_asn1(&session, &child, kOriginalHandshakeHashTag) ||
- !CBB_add_asn1_octet_string(&child, in->original_handshake_hash,
- in->original_handshake_hash_len)) {
- OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
- return 0;
- }
- }
-
- if (in->signed_cert_timestamp_list != nullptr) {
- if (!CBB_add_asn1(&session, &child, kSignedCertTimestampListTag) ||
- !CBB_add_asn1_octet_string(
- &child, CRYPTO_BUFFER_data(in->signed_cert_timestamp_list),
- CRYPTO_BUFFER_len(in->signed_cert_timestamp_list))) {
- OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
- return 0;
- }
- }
-
- if (in->ocsp_response != nullptr) {
- if (!CBB_add_asn1(&session, &child, kOCSPResponseTag) ||
- !CBB_add_asn1_octet_string(&child,
- CRYPTO_BUFFER_data(in->ocsp_response),
- CRYPTO_BUFFER_len(in->ocsp_response))) {
- OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
- return 0;
- }
- }
-
- if (in->extended_master_secret) {
- if (!CBB_add_asn1(&session, &child, kExtendedMasterSecretTag) ||
- !CBB_add_asn1_bool(&child, true)) {
- OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
- return 0;
- }
- }
-
- if (in->group_id > 0 &&
- (!CBB_add_asn1(&session, &child, kGroupIDTag) ||
- !CBB_add_asn1_uint64(&child, in->group_id))) {
- OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
- return 0;
- }
-
- // The certificate chain is only serialized if the leaf's SHA-256 isn't
- // serialized instead.
- if (in->certs != NULL &&
- !in->peer_sha256_valid &&
- sk_CRYPTO_BUFFER_num(in->certs) >= 2) {
- if (!CBB_add_asn1(&session, &child, kCertChainTag)) {
- OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
- return 0;
- }
- for (size_t i = 1; i < sk_CRYPTO_BUFFER_num(in->certs); i++) {
- const CRYPTO_BUFFER *buffer = sk_CRYPTO_BUFFER_value(in->certs, i);
- if (!CBB_add_bytes(&child, CRYPTO_BUFFER_data(buffer),
- CRYPTO_BUFFER_len(buffer))) {
- OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
- return 0;
- }
- }
- }
-
- if (in->ticket_age_add_valid) {
- if (!CBB_add_asn1(&session, &child, kTicketAgeAddTag) ||
- !CBB_add_asn1(&child, &child2, CBS_ASN1_OCTETSTRING) ||
- !CBB_add_u32(&child2, in->ticket_age_add)) {
- OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
- return 0;
- }
- }
-
- if (!in->is_server) {
- if (!CBB_add_asn1(&session, &child, kIsServerTag) ||
- !CBB_add_asn1_bool(&child, false)) {
- OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
- return 0;
- }
- }
-
- if (in->peer_signature_algorithm != 0 &&
- (!CBB_add_asn1(&session, &child, kPeerSignatureAlgorithmTag) ||
- !CBB_add_asn1_uint64(&child, in->peer_signature_algorithm))) {
- OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
- return 0;
- }
-
- if (in->ticket_max_early_data != 0 &&
- (!CBB_add_asn1(&session, &child, kTicketMaxEarlyDataTag) ||
- !CBB_add_asn1_uint64(&child, in->ticket_max_early_data))) {
- OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
- return 0;
- }
-
- if (in->timeout != in->auth_timeout &&
- (!CBB_add_asn1(&session, &child, kAuthTimeoutTag) ||
- !CBB_add_asn1_uint64(&child, in->auth_timeout))) {
- OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
- return 0;
- }
-
- if (in->early_alpn) {
- if (!CBB_add_asn1(&session, &child, kEarlyALPNTag) ||
- !CBB_add_asn1_octet_string(&child, (const uint8_t *)in->early_alpn,
- in->early_alpn_len)) {
- OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
- return 0;
- }
- }
-
- return CBB_flush(cbb);
- }
-
- // 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;
- }
-
- static int SSL_SESSION_parse_crypto_buffer(CBS *cbs, CRYPTO_BUFFER **out,
- unsigned tag,
- CRYPTO_BUFFER_POOL *pool) {
- if (!CBS_peek_asn1_tag(cbs, tag)) {
- return 1;
- }
-
- CBS child, value;
- if (!CBS_get_asn1(cbs, &child, tag) ||
- !CBS_get_asn1(&child, &value, CBS_ASN1_OCTETSTRING) ||
- CBS_len(&child) != 0) {
- OPENSSL_PUT_ERROR(SSL, SSL_R_INVALID_SSL_SESSION);
- return 0;
- }
- CRYPTO_BUFFER_free(*out);
- *out = CRYPTO_BUFFER_new_from_CBS(&value, pool);
- if (*out == nullptr) {
- 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, uint8_t *out_len, uint8_t 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;
- }
- OPENSSL_memcpy(out, CBS_data(&value), CBS_len(&value));
- *out_len = (uint8_t)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 int SSL_SESSION_parse_u16(CBS *cbs, uint16_t *out, unsigned tag,
- uint16_t default_value) {
- uint64_t value;
- if (!CBS_get_optional_asn1_uint64(cbs, &value, tag,
- (uint64_t)default_value) ||
- value > 0xffff) {
- OPENSSL_PUT_ERROR(SSL, SSL_R_INVALID_SSL_SESSION);
- return 0;
- }
- *out = (uint16_t)value;
- return 1;
- }
-
- UniquePtr<SSL_SESSION> SSL_SESSION_parse(CBS *cbs,
- const SSL_X509_METHOD *x509_method,
- CRYPTO_BUFFER_POOL *pool) {
- UniquePtr<SSL_SESSION> ret = ssl_session_new(x509_method);
- if (!ret) {
- return nullptr;
- }
-
- CBS session;
- uint64_t version, ssl_version;
- uint16_t unused;
- if (!CBS_get_asn1(cbs, &session, CBS_ASN1_SEQUENCE) ||
- !CBS_get_asn1_uint64(&session, &version) ||
- version != kVersion ||
- !CBS_get_asn1_uint64(&session, &ssl_version) ||
- // Require sessions have versions valid in either TLS or DTLS. The session
- // will not be used by the handshake if not applicable, but, for
- // simplicity, never parse a session that does not pass
- // |ssl_protocol_version_from_wire|.
- ssl_version > UINT16_MAX ||
- !ssl_protocol_version_from_wire(&unused, ssl_version)) {
- OPENSSL_PUT_ERROR(SSL, SSL_R_INVALID_SSL_SESSION);
- return nullptr;
- }
- 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);
- return nullptr;
- }
- ret->cipher = SSL_get_cipher_by_value(cipher_value);
- if (ret->cipher == NULL) {
- OPENSSL_PUT_ERROR(SSL, SSL_R_UNSUPPORTED_CIPHER);
- return nullptr;
- }
-
- 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);
- return nullptr;
- }
- OPENSSL_memcpy(ret->session_id, CBS_data(&session_id), CBS_len(&session_id));
- ret->session_id_length = CBS_len(&session_id);
- OPENSSL_memcpy(ret->master_key, CBS_data(&master_key), CBS_len(&master_key));
- ret->master_key_length = CBS_len(&master_key);
-
- CBS child;
- uint64_t timeout;
- if (!CBS_get_asn1(&session, &child, kTimeTag) ||
- !CBS_get_asn1_uint64(&child, &ret->time) ||
- !CBS_get_asn1(&session, &child, kTimeoutTag) ||
- !CBS_get_asn1_uint64(&child, &timeout) ||
- timeout > UINT32_MAX) {
- OPENSSL_PUT_ERROR(SSL, SSL_R_INVALID_SSL_SESSION);
- return nullptr;
- }
-
- ret->timeout = (uint32_t)timeout;
-
- CBS peer;
- int has_peer;
- if (!CBS_get_optional_asn1(&session, &peer, &has_peer, kPeerTag) ||
- (has_peer && CBS_len(&peer) == 0)) {
- OPENSSL_PUT_ERROR(SSL, SSL_R_INVALID_SSL_SESSION);
- return nullptr;
- }
- // |peer| is processed with the certificate chain.
-
- 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)) {
- return nullptr;
- }
-
- // Skip the historical hostName field.
- CBS unused_hostname;
- if (!CBS_get_optional_asn1(&session, &unused_hostname, nullptr,
- kHostNameTag)) {
- OPENSSL_PUT_ERROR(SSL, SSL_R_INVALID_SSL_SESSION);
- return nullptr;
- }
-
- if (!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)) {
- return nullptr;
- }
-
- if (CBS_peek_asn1_tag(&session, kPeerSHA256Tag)) {
- CBS 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);
- return nullptr;
- }
- OPENSSL_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_crypto_buffer(&session,
- &ret->signed_cert_timestamp_list,
- kSignedCertTimestampListTag, pool) ||
- !SSL_SESSION_parse_crypto_buffer(&session, &ret->ocsp_response,
- kOCSPResponseTag, pool)) {
- return nullptr;
- }
-
- 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);
- return nullptr;
- }
- ret->extended_master_secret = !!extended_master_secret;
-
- if (!SSL_SESSION_parse_u16(&session, &ret->group_id, kGroupIDTag, 0)) {
- OPENSSL_PUT_ERROR(SSL, SSL_R_INVALID_SSL_SESSION);
- return nullptr;
- }
-
- CBS cert_chain;
- CBS_init(&cert_chain, NULL, 0);
- int has_cert_chain;
- if (!CBS_get_optional_asn1(&session, &cert_chain, &has_cert_chain,
- kCertChainTag) ||
- (has_cert_chain && CBS_len(&cert_chain) == 0)) {
- OPENSSL_PUT_ERROR(SSL, SSL_R_INVALID_SSL_SESSION);
- return nullptr;
- }
- if (has_cert_chain && !has_peer) {
- OPENSSL_PUT_ERROR(SSL, SSL_R_INVALID_SSL_SESSION);
- return nullptr;
- }
- if (has_peer || has_cert_chain) {
- ret->certs = sk_CRYPTO_BUFFER_new_null();
- if (ret->certs == NULL) {
- OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
- return nullptr;
- }
-
- if (has_peer) {
- UniquePtr<CRYPTO_BUFFER> buffer(CRYPTO_BUFFER_new_from_CBS(&peer, pool));
- if (!buffer ||
- !PushToStack(ret->certs, std::move(buffer))) {
- OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
- return nullptr;
- }
- }
-
- while (CBS_len(&cert_chain) > 0) {
- CBS cert;
- if (!CBS_get_any_asn1_element(&cert_chain, &cert, NULL, NULL) ||
- CBS_len(&cert) == 0) {
- OPENSSL_PUT_ERROR(SSL, SSL_R_INVALID_SSL_SESSION);
- return nullptr;
- }
-
- CRYPTO_BUFFER *buffer = CRYPTO_BUFFER_new_from_CBS(&cert, pool);
- if (buffer == NULL ||
- !sk_CRYPTO_BUFFER_push(ret->certs, buffer)) {
- CRYPTO_BUFFER_free(buffer);
- OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
- return nullptr;
- }
- }
- }
-
- if (!x509_method->session_cache_objects(ret.get())) {
- OPENSSL_PUT_ERROR(SSL, SSL_R_INVALID_SSL_SESSION);
- return nullptr;
- }
-
- CBS age_add;
- int age_add_present;
- if (!CBS_get_optional_asn1_octet_string(&session, &age_add, &age_add_present,
- kTicketAgeAddTag) ||
- (age_add_present &&
- !CBS_get_u32(&age_add, &ret->ticket_age_add)) ||
- CBS_len(&age_add) != 0) {
- return nullptr;
- }
- ret->ticket_age_add_valid = age_add_present;
-
- int is_server;
- if (!CBS_get_optional_asn1_bool(&session, &is_server, kIsServerTag,
- 1 /* default to true */)) {
- OPENSSL_PUT_ERROR(SSL, SSL_R_INVALID_SSL_SESSION);
- return nullptr;
- }
- /* TODO: in time we can include |is_server| for servers too, then we can
- enforce that client and server sessions are never mixed up. */
-
- ret->is_server = is_server;
-
- if (!SSL_SESSION_parse_u16(&session, &ret->peer_signature_algorithm,
- kPeerSignatureAlgorithmTag, 0) ||
- !SSL_SESSION_parse_u32(&session, &ret->ticket_max_early_data,
- kTicketMaxEarlyDataTag, 0) ||
- !SSL_SESSION_parse_u32(&session, &ret->auth_timeout, kAuthTimeoutTag,
- ret->timeout) ||
- !SSL_SESSION_parse_octet_string(&session, &ret->early_alpn,
- &ret->early_alpn_len, kEarlyALPNTag) ||
- CBS_len(&session) != 0) {
- OPENSSL_PUT_ERROR(SSL, SSL_R_INVALID_SSL_SESSION);
- return nullptr;
- }
-
- return ret;
- }
-
- int ssl_session_serialize(const SSL_SESSION *in, CBB *cbb) {
- return SSL_SESSION_to_bytes_full(in, cbb, 0);
- }
-
- } // namespace bssl
-
- using namespace bssl;
-
- int SSL_SESSION_to_bytes(const SSL_SESSION *in, uint8_t **out_data,
- size_t *out_len) {
- if (in->not_resumable) {
- // If the caller has an unresumable session, e.g. if |SSL_get_session| were
- // called on a TLS 1.3 or False Started connection, serialize with a
- // placeholder value so it is not accidentally deserialized into a resumable
- // one.
- static const char kNotResumableSession[] = "NOT RESUMABLE";
-
- *out_len = strlen(kNotResumableSession);
- *out_data = (uint8_t *)BUF_memdup(kNotResumableSession, *out_len);
- if (*out_data == NULL) {
- return 0;
- }
-
- return 1;
- }
-
- ScopedCBB cbb;
- if (!CBB_init(cbb.get(), 256) ||
- !SSL_SESSION_to_bytes_full(in, cbb.get(), 0) ||
- !CBB_finish(cbb.get(), out_data, out_len)) {
- return 0;
- }
-
- return 1;
- }
-
- int SSL_SESSION_to_bytes_for_ticket(const SSL_SESSION *in, uint8_t **out_data,
- size_t *out_len) {
- ScopedCBB cbb;
- if (!CBB_init(cbb.get(), 256) ||
- !SSL_SESSION_to_bytes_full(in, cbb.get(), 1) ||
- !CBB_finish(cbb.get(), out_data, out_len)) {
- return 0;
- }
-
- return 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) {
- OPENSSL_memcpy(*pp, out, len);
- *pp += len;
- }
- OPENSSL_free(out);
-
- return len;
- }
-
- SSL_SESSION *SSL_SESSION_from_bytes(const uint8_t *in, size_t in_len,
- const SSL_CTX *ctx) {
- CBS cbs;
- CBS_init(&cbs, in, in_len);
- UniquePtr<SSL_SESSION> ret =
- SSL_SESSION_parse(&cbs, ctx->x509_method, ctx->pool);
- if (!ret) {
- return NULL;
- }
- if (CBS_len(&cbs) != 0) {
- OPENSSL_PUT_ERROR(SSL, SSL_R_INVALID_SSL_SESSION);
- return NULL;
- }
- return ret.release();
- }
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