| /* 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 <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" |
| |
| |
| BSSL_NAMESPACE_BEGIN |
| |
| // 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.get()) > 0 && !in->peer_sha256_valid) { |
| const CRYPTO_BUFFER *buffer = sk_CRYPTO_BUFFER_value(in->certs.get(), 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.get(), |
| strlen(in->psk_identity.get()))) { |
| OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE); |
| return 0; |
| } |
| } |
| |
| if (in->ticket_lifetime_hint > 0) { |
| if (!CBB_add_asn1(&session, &child, kTicketLifetimeHintTag) || |
| !CBB_add_asn1_uint64(&child, in->ticket_lifetime_hint)) { |
| OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE); |
| return 0; |
| } |
| } |
| |
| if (!in->ticket.empty() && !for_ticket) { |
| if (!CBB_add_asn1(&session, &child, kTicketTag) || |
| !CBB_add_asn1_octet_string(&child, in->ticket.data(), |
| in->ticket.size())) { |
| 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.get()), |
| CRYPTO_BUFFER_len(in->signed_cert_timestamp_list.get()))) { |
| 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.get()), |
| CRYPTO_BUFFER_len(in->ocsp_response.get()))) { |
| 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.get()) >= 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.get()); i++) { |
| const CRYPTO_BUFFER *buffer = sk_CRYPTO_BUFFER_value(in->certs.get(), 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.empty()) { |
| if (!CBB_add_asn1(&session, &child, kEarlyALPNTag) || |
| !CBB_add_asn1_octet_string(&child, in->early_alpn.data(), |
| in->early_alpn.size())) { |
| 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|. 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, UniquePtr<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; |
| } |
| char *raw = nullptr; |
| if (!CBS_strdup(&value, &raw)) { |
| OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE); |
| return 0; |
| } |
| out->reset(raw); |
| } else { |
| out->reset(); |
| } |
| return 1; |
| } |
| |
| // SSL_SESSION_parse_octet_string gets an optional ASN.1 OCTET STRING explicitly |
| // tagged with |tag| from |cbs| and stows it in |*out|. It returns one on |
| // success, whether or not the element was found, and zero on decode error. |
| static bool SSL_SESSION_parse_octet_string(CBS *cbs, Array<uint8_t> *out, |
| 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 false; |
| } |
| return out->CopyFrom(value); |
| } |
| |
| static int SSL_SESSION_parse_crypto_buffer(CBS *cbs, |
| UniquePtr<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; |
| } |
| out->reset(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->ticket_lifetime_hint, |
| kTicketLifetimeHintTag, 0) || |
| !SSL_SESSION_parse_octet_string(&session, &ret->ticket, 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.reset(sk_CRYPTO_BUFFER_new_null()); |
| if (ret->certs == nullptr) { |
| 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.get(), 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; |
| } |
| |
| UniquePtr<CRYPTO_BUFFER> buffer(CRYPTO_BUFFER_new_from_CBS(&cert, pool)); |
| if (buffer == nullptr || |
| !PushToStack(ret->certs.get(), std::move(buffer))) { |
| OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE); |
| 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 != 0; |
| |
| 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, |
| kEarlyALPNTag) || |
| CBS_len(&session) != 0) { |
| OPENSSL_PUT_ERROR(SSL, SSL_R_INVALID_SSL_SESSION); |
| return nullptr; |
| } |
| |
| if (!x509_method->session_cache_objects(ret.get())) { |
| 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); |
| } |
| |
| BSSL_NAMESPACE_END |
| |
| 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(); |
| } |
