| /* 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 <openssl/ssl.h> |
| |
| #include <limits.h> |
| #include <string.h> |
| |
| #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" |
| |
| |
| /* 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 |
| * 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, |
| * groupID [18] INTEGER OPTIONAL, |
| * -- For historical reasons, for legacy DHE or |
| * -- static RSA ciphers, this field contains |
| * -- another value to be discarded. |
| * certChain [19] SEQUENCE OF Certificate OPTIONAL, |
| * ticketAgeAdd [21] OCTET STRING OPTIONAL, |
| * isServer [22] BOOLEAN DEFAULT TRUE, |
| * peerSignatureAlgorithm [23] INTEGER OPTIONAL, |
| * ticketMaxEarlyData [24] 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, |
| * ticketFlags [20] INTEGER OPTIONAL, |
| */ |
| |
| static const unsigned kVersion = 1; |
| |
| 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 kGroupIDTag = |
| CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 18; |
| static const int kCertChainTag = |
| CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 19; |
| static const int kTicketAgeAddTag = |
| CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 21; |
| static const int kIsServerTag = |
| CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 22; |
| static const int kPeerSignatureAlgorithmTag = |
| CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 23; |
| static const int kTicketMaxEarlyDataTag = |
| CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 24; |
| |
| static int SSL_SESSION_to_bytes_full(const 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, 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)) || |
| !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) { |
| OPENSSL_PUT_ERROR(SSL, SSL_R_INVALID_SSL_SESSION); |
| goto err; |
| } |
| |
| 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) { |
| OPENSSL_PUT_ERROR(SSL, SSL_R_INVALID_SSL_SESSION); |
| goto err; |
| } |
| |
| 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 (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); |
| 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->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); |
| goto err; |
| } |
| |
| /* 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); |
| goto err; |
| } |
| 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); |
| goto err; |
| } |
| } |
| } |
| |
| 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); |
| goto err; |
| } |
| } |
| |
| if (!in->is_server) { |
| if (!CBB_add_asn1(&session, &child, kIsServerTag) || |
| !CBB_add_asn1(&child, &child2, CBS_ASN1_BOOLEAN) || |
| !CBB_add_u8(&child2, 0x00)) { |
| OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE); |
| goto err; |
| } |
| } |
| |
| 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); |
| goto err; |
| } |
| |
| 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); |
| 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(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 = BUF_memdup(kNotResumableSession, *out_len); |
| if (*out_data == NULL) { |
| return 0; |
| } |
| |
| return 1; |
| } |
| |
| return SSL_SESSION_to_bytes_full(in, out_data, out_len, 0); |
| } |
| |
| int SSL_SESSION_to_bytes_for_ticket(const 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) { |
| OPENSSL_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, 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; |
| } |
| |
| 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 != kVersion || |
| !CBS_get_asn1_uint64(&session, &ssl_version)) { |
| OPENSSL_PUT_ERROR(SSL, SSL_R_INVALID_SSL_SESSION); |
| 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; |
| } |
| 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 time, timeout; |
| if (!CBS_get_asn1(&session, &child, kTimeTag) || |
| !CBS_get_asn1_uint64(&child, &time) || |
| time > LONG_MAX || |
| !CBS_get_asn1(&session, &child, kTimeoutTag) || |
| !CBS_get_asn1_uint64(&child, &timeout) || |
| timeout > LONG_MAX) { |
| OPENSSL_PUT_ERROR(SSL, SSL_R_INVALID_SSL_SESSION); |
| goto err; |
| } |
| |
| ret->time = (long)time; |
| ret->timeout = (long)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); |
| goto err; |
| } |
| /* |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) || |
| !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 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; |
| } |
| 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_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; |
| |
| uint32_t value; |
| if (!SSL_SESSION_parse_u32(&session, &value, kGroupIDTag, 0)) { |
| OPENSSL_PUT_ERROR(SSL, SSL_R_INVALID_SSL_SESSION); |
| goto err; |
| } |
| |
| /* Historically, the group_id field was used for key-exchange-specific |
| * information. Discard all but the group ID. */ |
| if (ret->cipher->algorithm_mkey & (SSL_kRSA | SSL_kDHE)) { |
| value = 0; |
| } |
| |
| if (value > 0xffff) { |
| OPENSSL_PUT_ERROR(SSL, SSL_R_INVALID_SSL_SESSION); |
| goto err; |
| } |
| ret->group_id = (uint16_t)value; |
| |
| 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); |
| goto err; |
| } |
| if (has_cert_chain && !has_peer) { |
| OPENSSL_PUT_ERROR(SSL, SSL_R_INVALID_SSL_SESSION); |
| goto err; |
| } |
| 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); |
| goto err; |
| } |
| |
| if (has_peer) { |
| /* TODO(agl): this should use the |SSL_CTX|'s pool. */ |
| CRYPTO_BUFFER *buffer = CRYPTO_BUFFER_new_from_CBS(&peer, NULL); |
| if (buffer == NULL || |
| !sk_CRYPTO_BUFFER_push(ret->certs, buffer)) { |
| CRYPTO_BUFFER_free(buffer); |
| OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE); |
| goto err; |
| } |
| } |
| |
| 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); |
| goto err; |
| } |
| |
| /* TODO(agl): this should use the |SSL_CTX|'s pool. */ |
| CRYPTO_BUFFER *buffer = CRYPTO_BUFFER_new_from_CBS(&cert, NULL); |
| if (buffer == NULL || |
| !sk_CRYPTO_BUFFER_push(ret->certs, buffer)) { |
| CRYPTO_BUFFER_free(buffer); |
| OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE); |
| goto err; |
| } |
| } |
| } |
| |
| if (!ssl_session_x509_cache_objects(ret)) { |
| OPENSSL_PUT_ERROR(SSL, SSL_R_INVALID_SSL_SESSION); |
| goto err; |
| } |
| |
| 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) { |
| goto err; |
| } |
| 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); |
| goto err; |
| } |
| /* 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) || |
| 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; |
| } |
