// Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved. // Copyright 2005 Nokia. All rights reserved. // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // https://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. #include #include #include #include #include #include #include #include #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, // secret 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, // isQuic [27] BOOLEAN OPTIONAL, // quicEarlyDataHash [28] OCTET STRING OPTIONAL, // localALPS [29] OCTET STRING OPTIONAL, // peerALPS [30] OCTET STRING OPTIONAL, // -- Either both or none of localALPS and peerALPS must be present. If both // -- are present, earlyALPN must be present and non-empty. // resumableAcrossNames [31] BOOLEAN 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 CBS_ASN1_TAG kTimeTag = CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 1; static const CBS_ASN1_TAG kTimeoutTag = CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 2; static const CBS_ASN1_TAG kPeerTag = CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 3; static const CBS_ASN1_TAG kSessionIDContextTag = CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 4; static const CBS_ASN1_TAG kVerifyResultTag = CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 5; static const CBS_ASN1_TAG kHostNameTag = CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 6; static const CBS_ASN1_TAG kPSKIdentityTag = CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 8; static const CBS_ASN1_TAG kTicketLifetimeHintTag = CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 9; static const CBS_ASN1_TAG kTicketTag = CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 10; static const CBS_ASN1_TAG kPeerSHA256Tag = CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 13; static const CBS_ASN1_TAG kOriginalHandshakeHashTag = CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 14; static const CBS_ASN1_TAG kSignedCertTimestampListTag = CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 15; static const CBS_ASN1_TAG kOCSPResponseTag = CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 16; static const CBS_ASN1_TAG kExtendedMasterSecretTag = CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 17; static const CBS_ASN1_TAG kGroupIDTag = CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 18; static const CBS_ASN1_TAG kCertChainTag = CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 19; static const CBS_ASN1_TAG kTicketAgeAddTag = CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 21; static const CBS_ASN1_TAG kIsServerTag = CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 22; static const CBS_ASN1_TAG kPeerSignatureAlgorithmTag = CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 23; static const CBS_ASN1_TAG kTicketMaxEarlyDataTag = CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 24; static const CBS_ASN1_TAG kAuthTimeoutTag = CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 25; static const CBS_ASN1_TAG kEarlyALPNTag = CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 26; static const CBS_ASN1_TAG kIsQuicTag = CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 27; static const CBS_ASN1_TAG kQuicEarlyDataContextTag = CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 28; static const CBS_ASN1_TAG kLocalALPSTag = CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 29; static const CBS_ASN1_TAG kPeerALPSTag = CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 30; static const CBS_ASN1_TAG kResumableAcrossNamesTag = CBS_ASN1_CONSTRUCTED | CBS_ASN1_CONTEXT_SPECIFIC | 31; static int SSL_SESSION_to_bytes_full(const SSL_SESSION *in, CBB *cbb, int for_ticket) { if (in == nullptr || in->cipher == nullptr) { 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, in->cipher->protocol_id) || // The session ID is irrelevant for a session ticket. !CBB_add_asn1_octet_string(&session, in->session_id.data(), for_ticket ? 0 : in->session_id.size()) || !CBB_add_asn1_octet_string(&session, in->secret.data(), in->secret.size()) || !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)) { 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_element(&session, kPeerTag, CRYPTO_BUFFER_data(buffer), CRYPTO_BUFFER_len(buffer))) { 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.data(), in->sid_ctx.size())) { return 0; } if (in->verify_result != X509_V_OK) { if (!CBB_add_asn1(&session, &child, kVerifyResultTag) || !CBB_add_asn1_uint64(&child, in->verify_result)) { 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()))) { return 0; } } if (in->ticket_lifetime_hint > 0) { if (!CBB_add_asn1(&session, &child, kTicketLifetimeHintTag) || !CBB_add_asn1_uint64(&child, in->ticket_lifetime_hint)) { 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())) { 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))) { return 0; } } if (!in->original_handshake_hash.empty()) { if (!CBB_add_asn1(&session, &child, kOriginalHandshakeHashTag) || !CBB_add_asn1_octet_string(&child, in->original_handshake_hash.data(), in->original_handshake_hash.size())) { 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()))) { 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()))) { return 0; } } if (in->extended_master_secret) { if (!CBB_add_asn1(&session, &child, kExtendedMasterSecretTag) || !CBB_add_asn1_bool(&child, true)) { return 0; } } if (in->group_id > 0 && // (!CBB_add_asn1(&session, &child, kGroupIDTag) || // !CBB_add_asn1_uint64(&child, in->group_id))) { return 0; } // The certificate chain is only serialized if the leaf's SHA-256 isn't // serialized instead. if (in->certs != nullptr && // !in->peer_sha256_valid && // sk_CRYPTO_BUFFER_num(in->certs.get()) >= 2) { if (!CBB_add_asn1(&session, &child, kCertChainTag)) { 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))) { 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)) { return 0; } } if (!in->is_server) { if (!CBB_add_asn1(&session, &child, kIsServerTag) || !CBB_add_asn1_bool(&child, false)) { return 0; } } if (in->peer_signature_algorithm != 0 && (!CBB_add_asn1(&session, &child, kPeerSignatureAlgorithmTag) || !CBB_add_asn1_uint64(&child, in->peer_signature_algorithm))) { 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))) { return 0; } if (in->timeout != in->auth_timeout && (!CBB_add_asn1(&session, &child, kAuthTimeoutTag) || !CBB_add_asn1_uint64(&child, in->auth_timeout))) { 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())) { return 0; } } if (in->is_quic) { if (!CBB_add_asn1(&session, &child, kIsQuicTag) || !CBB_add_asn1_bool(&child, true)) { return 0; } } if (!in->quic_early_data_context.empty()) { if (!CBB_add_asn1(&session, &child, kQuicEarlyDataContextTag) || !CBB_add_asn1_octet_string(&child, in->quic_early_data_context.data(), in->quic_early_data_context.size())) { return 0; } } if (in->has_application_settings) { if (!CBB_add_asn1(&session, &child, kLocalALPSTag) || !CBB_add_asn1_octet_string(&child, in->local_application_settings.data(), in->local_application_settings.size()) || !CBB_add_asn1(&session, &child, kPeerALPSTag) || !CBB_add_asn1_octet_string(&child, in->peer_application_settings.data(), in->peer_application_settings.size())) { return 0; } } if (in->is_resumable_across_names) { if (!CBB_add_asn1(&session, &child, kResumableAcrossNamesTag) || !CBB_add_asn1_bool(&child, true)) { 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 *out, CBS_ASN1_TAG 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)) { 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 *out, CBS_ASN1_TAG tag) { CBS value; if (!CBS_get_optional_asn1_octet_string(cbs, &value, nullptr, 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 *out, CBS_ASN1_TAG 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) { return 0; } return 1; } static int SSL_SESSION_parse_long(CBS *cbs, long *out, CBS_ASN1_TAG 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, CBS_ASN1_TAG 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, CBS_ASN1_TAG 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_parse(CBS *cbs, const SSL_X509_METHOD *x509_method, CRYPTO_BUFFER_POOL *pool) { UniquePtr 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 == nullptr) { OPENSSL_PUT_ERROR(SSL, SSL_R_UNSUPPORTED_CIPHER); return nullptr; } CBS session_id, secret, child; uint64_t timeout; if (!CBS_get_asn1(&session, &session_id, CBS_ASN1_OCTETSTRING) || !ret->session_id.TryCopyFrom(session_id) || !CBS_get_asn1(&session, &secret, CBS_ASN1_OCTETSTRING) || !ret->secret.TryCopyFrom(secret) || !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. CBS sid_ctx; if (!CBS_get_optional_asn1_octet_string( &session, &sid_ctx, /*out_present=*/nullptr, kSessionIDContextTag) || !ret->sid_ctx.TryCopyFrom(sid_ctx) || !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 = true; } else { ret->peer_sha256_valid = false; } CBS original_handshake_hash; if (!CBS_get_optional_asn1_octet_string(&session, &original_handshake_hash, /*out_present=*/nullptr, kOriginalHandshakeHashTag) || !ret->original_handshake_hash.TryCopyFrom(original_handshake_hash) || !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, nullptr, 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) { return nullptr; } if (has_peer) { UniquePtr buffer(CRYPTO_BUFFER_new_from_CBS(&peer, pool)); if (!buffer || // !PushToStack(ret->certs.get(), std::move(buffer))) { return nullptr; } } while (CBS_len(&cert_chain) > 0) { CBS cert; if (!CBS_get_any_asn1_element(&cert_chain, &cert, nullptr, nullptr) || CBS_len(&cert) == 0) { OPENSSL_PUT_ERROR(SSL, SSL_R_INVALID_SSL_SESSION); return nullptr; } UniquePtr buffer(CRYPTO_BUFFER_new_from_CBS(&cert, pool)); if (buffer == nullptr || !PushToStack(ret->certs.get(), std::move(buffer))) { 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; int is_quic; 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_get_optional_asn1_bool(&session, &is_quic, kIsQuicTag, /*default_value=*/false) || !SSL_SESSION_parse_octet_string(&session, &ret->quic_early_data_context, kQuicEarlyDataContextTag)) { OPENSSL_PUT_ERROR(SSL, SSL_R_INVALID_SSL_SESSION); return nullptr; } CBS settings; int has_local_alps, has_peer_alps, is_resumable_across_names; if (!CBS_get_optional_asn1_octet_string(&session, &settings, &has_local_alps, kLocalALPSTag) || !ret->local_application_settings.CopyFrom(settings) || !CBS_get_optional_asn1_octet_string(&session, &settings, &has_peer_alps, kPeerALPSTag) || !ret->peer_application_settings.CopyFrom(settings) || !CBS_get_optional_asn1_bool(&session, &is_resumable_across_names, kResumableAcrossNamesTag, /*default_value=*/false) || CBS_len(&session) != 0) { OPENSSL_PUT_ERROR(SSL, SSL_R_INVALID_SSL_SESSION); return nullptr; } ret->is_quic = is_quic; ret->is_resumable_across_names = is_resumable_across_names; // The two ALPS values and ALPN must be consistent. if (has_local_alps != has_peer_alps || (has_local_alps && ret->early_alpn.empty())) { OPENSSL_PUT_ERROR(SSL, SSL_R_INVALID_SSL_SESSION); return nullptr; } ret->has_application_settings = has_local_alps; if (!x509_method->session_cache_objects(ret.get())) { OPENSSL_PUT_ERROR(SSL, SSL_R_INVALID_SSL_SESSION); return nullptr; } return ret; } bool 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 *)OPENSSL_memdup(kNotResumableSession, *out_len); if (*out_data == nullptr) { 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 ret = SSL_SESSION_parse(&cbs, ctx->x509_method, ctx->pool); if (!ret) { return nullptr; } if (CBS_len(&cbs) != 0) { OPENSSL_PUT_ERROR(SSL, SSL_R_INVALID_SSL_SESSION); return nullptr; } return ret.release(); }