mirror of
https://github.com/DrKLO/Telegram.git
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690 lines
23 KiB
C++
690 lines
23 KiB
C++
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/* Copyright (c) 2016, Google Inc.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
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* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
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#include <openssl/ssl.h>
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#include <assert.h>
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#include <string.h>
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#include <utility>
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#include <openssl/bytestring.h>
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#include <openssl/err.h>
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#include <openssl/hkdf.h>
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#include <openssl/mem.h>
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#include <openssl/stack.h>
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#include <openssl/x509.h>
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#include "../crypto/internal.h"
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#include "internal.h"
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BSSL_NAMESPACE_BEGIN
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// kMaxKeyUpdates is the number of consecutive KeyUpdates that will be
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// processed. Without this limit an attacker could force unbounded processing
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// without being able to return application data.
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static const uint8_t kMaxKeyUpdates = 32;
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const uint8_t kHelloRetryRequest[SSL3_RANDOM_SIZE] = {
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0xcf, 0x21, 0xad, 0x74, 0xe5, 0x9a, 0x61, 0x11, 0xbe, 0x1d, 0x8c,
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0x02, 0x1e, 0x65, 0xb8, 0x91, 0xc2, 0xa2, 0x11, 0x16, 0x7a, 0xbb,
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0x8c, 0x5e, 0x07, 0x9e, 0x09, 0xe2, 0xc8, 0xa8, 0x33, 0x9c,
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};
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// See RFC 8446, section 4.1.3.
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const uint8_t kTLS12DowngradeRandom[8] = {0x44, 0x4f, 0x57, 0x4e,
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0x47, 0x52, 0x44, 0x00};
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const uint8_t kTLS13DowngradeRandom[8] = {0x44, 0x4f, 0x57, 0x4e,
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0x47, 0x52, 0x44, 0x01};
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// This is a non-standard randomly-generated value.
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const uint8_t kJDK11DowngradeRandom[8] = {0xed, 0xbf, 0xb4, 0xa8,
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0xc2, 0x47, 0x10, 0xff};
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bool tls13_get_cert_verify_signature_input(
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SSL_HANDSHAKE *hs, Array<uint8_t> *out,
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enum ssl_cert_verify_context_t cert_verify_context) {
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ScopedCBB cbb;
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if (!CBB_init(cbb.get(), 64 + 33 + 1 + 2 * EVP_MAX_MD_SIZE)) {
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OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
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return false;
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}
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for (size_t i = 0; i < 64; i++) {
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if (!CBB_add_u8(cbb.get(), 0x20)) {
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OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
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return false;
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}
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}
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Span<const char> context;
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if (cert_verify_context == ssl_cert_verify_server) {
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static const char kContext[] = "TLS 1.3, server CertificateVerify";
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context = kContext;
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} else if (cert_verify_context == ssl_cert_verify_client) {
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static const char kContext[] = "TLS 1.3, client CertificateVerify";
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context = kContext;
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} else if (cert_verify_context == ssl_cert_verify_channel_id) {
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static const char kContext[] = "TLS 1.3, Channel ID";
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context = kContext;
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} else {
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OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
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return false;
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}
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// Note |context| includes the NUL byte separator.
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if (!CBB_add_bytes(cbb.get(),
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reinterpret_cast<const uint8_t *>(context.data()),
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context.size())) {
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OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
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return false;
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}
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uint8_t context_hash[EVP_MAX_MD_SIZE];
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size_t context_hash_len;
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if (!hs->transcript.GetHash(context_hash, &context_hash_len) ||
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!CBB_add_bytes(cbb.get(), context_hash, context_hash_len) ||
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!CBBFinishArray(cbb.get(), out)) {
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OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
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return false;
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}
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return true;
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}
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bool tls13_process_certificate(SSL_HANDSHAKE *hs, const SSLMessage &msg,
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bool allow_anonymous) {
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SSL *const ssl = hs->ssl;
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CBS body = msg.body;
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bssl::UniquePtr<CRYPTO_BUFFER> decompressed;
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if (msg.type == SSL3_MT_COMPRESSED_CERTIFICATE) {
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CBS compressed;
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uint16_t alg_id;
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uint32_t uncompressed_len;
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if (!CBS_get_u16(&body, &alg_id) ||
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!CBS_get_u24(&body, &uncompressed_len) ||
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!CBS_get_u24_length_prefixed(&body, &compressed) ||
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CBS_len(&body) != 0) {
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ssl_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
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OPENSSL_PUT_ERROR(SSL, SSL_R_DECODE_ERROR);
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return false;
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}
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if (uncompressed_len > ssl->max_cert_list) {
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ssl_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_ILLEGAL_PARAMETER);
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OPENSSL_PUT_ERROR(SSL, SSL_R_UNCOMPRESSED_CERT_TOO_LARGE);
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ERR_add_error_dataf("requested=%u",
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static_cast<unsigned>(uncompressed_len));
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return false;
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}
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ssl_cert_decompression_func_t decompress = nullptr;
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for (const auto* alg : ssl->ctx->cert_compression_algs.get()) {
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if (alg->alg_id == alg_id) {
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decompress = alg->decompress;
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break;
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}
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}
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if (decompress == nullptr) {
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ssl_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_ILLEGAL_PARAMETER);
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OPENSSL_PUT_ERROR(SSL, SSL_R_UNKNOWN_CERT_COMPRESSION_ALG);
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ERR_add_error_dataf("alg=%d", static_cast<int>(alg_id));
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return false;
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}
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CRYPTO_BUFFER *decompressed_ptr = nullptr;
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if (!decompress(ssl, &decompressed_ptr, uncompressed_len,
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CBS_data(&compressed), CBS_len(&compressed))) {
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ssl_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
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OPENSSL_PUT_ERROR(SSL, SSL_R_CERT_DECOMPRESSION_FAILED);
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ERR_add_error_dataf("alg=%d", static_cast<int>(alg_id));
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return false;
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}
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decompressed.reset(decompressed_ptr);
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if (CRYPTO_BUFFER_len(decompressed_ptr) != uncompressed_len) {
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ssl_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
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OPENSSL_PUT_ERROR(SSL, SSL_R_CERT_DECOMPRESSION_FAILED);
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ERR_add_error_dataf(
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"alg=%d got=%u expected=%u", static_cast<int>(alg_id),
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static_cast<unsigned>(CRYPTO_BUFFER_len(decompressed_ptr)),
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static_cast<unsigned>(uncompressed_len));
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return false;
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}
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CBS_init(&body, CRYPTO_BUFFER_data(decompressed_ptr),
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CRYPTO_BUFFER_len(decompressed_ptr));
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} else {
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assert(msg.type == SSL3_MT_CERTIFICATE);
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}
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CBS context, certificate_list;
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if (!CBS_get_u8_length_prefixed(&body, &context) ||
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CBS_len(&context) != 0 ||
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!CBS_get_u24_length_prefixed(&body, &certificate_list) ||
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CBS_len(&body) != 0) {
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ssl_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
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OPENSSL_PUT_ERROR(SSL, SSL_R_DECODE_ERROR);
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return false;
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}
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UniquePtr<STACK_OF(CRYPTO_BUFFER)> certs(sk_CRYPTO_BUFFER_new_null());
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if (!certs) {
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ssl_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
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OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
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return false;
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}
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const bool retain_sha256 =
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ssl->server && hs->config->retain_only_sha256_of_client_certs;
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UniquePtr<EVP_PKEY> pkey;
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while (CBS_len(&certificate_list) > 0) {
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CBS certificate, extensions;
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if (!CBS_get_u24_length_prefixed(&certificate_list, &certificate) ||
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!CBS_get_u16_length_prefixed(&certificate_list, &extensions) ||
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CBS_len(&certificate) == 0) {
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ssl_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
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OPENSSL_PUT_ERROR(SSL, SSL_R_CERT_LENGTH_MISMATCH);
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return false;
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}
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if (sk_CRYPTO_BUFFER_num(certs.get()) == 0) {
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pkey = ssl_cert_parse_pubkey(&certificate);
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if (!pkey) {
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ssl_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
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OPENSSL_PUT_ERROR(SSL, SSL_R_DECODE_ERROR);
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return false;
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}
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// TLS 1.3 always uses certificate keys for signing thus the correct
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// keyUsage is enforced.
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if (!ssl_cert_check_key_usage(&certificate,
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key_usage_digital_signature)) {
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ssl_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_ILLEGAL_PARAMETER);
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return false;
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}
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if (retain_sha256) {
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// Retain the hash of the leaf certificate if requested.
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SHA256(CBS_data(&certificate), CBS_len(&certificate),
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hs->new_session->peer_sha256);
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}
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}
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UniquePtr<CRYPTO_BUFFER> buf(
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CRYPTO_BUFFER_new_from_CBS(&certificate, ssl->ctx->pool));
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if (!buf ||
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!PushToStack(certs.get(), std::move(buf))) {
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ssl_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
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OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
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return false;
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}
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// Parse out the extensions.
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bool have_status_request = false, have_sct = false;
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CBS status_request, sct;
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const SSL_EXTENSION_TYPE ext_types[] = {
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{TLSEXT_TYPE_status_request, &have_status_request, &status_request},
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{TLSEXT_TYPE_certificate_timestamp, &have_sct, &sct},
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};
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uint8_t alert = SSL_AD_DECODE_ERROR;
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if (!ssl_parse_extensions(&extensions, &alert, ext_types,
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OPENSSL_ARRAY_SIZE(ext_types),
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0 /* reject unknown */)) {
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ssl_send_alert(ssl, SSL3_AL_FATAL, alert);
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return false;
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}
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// All Certificate extensions are parsed, but only the leaf extensions are
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// stored.
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if (have_status_request) {
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if (ssl->server || !hs->config->ocsp_stapling_enabled) {
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OPENSSL_PUT_ERROR(SSL, SSL_R_UNEXPECTED_EXTENSION);
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ssl_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_UNSUPPORTED_EXTENSION);
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return false;
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}
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uint8_t status_type;
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CBS ocsp_response;
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if (!CBS_get_u8(&status_request, &status_type) ||
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status_type != TLSEXT_STATUSTYPE_ocsp ||
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!CBS_get_u24_length_prefixed(&status_request, &ocsp_response) ||
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CBS_len(&ocsp_response) == 0 ||
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CBS_len(&status_request) != 0) {
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ssl_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
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return false;
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}
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if (sk_CRYPTO_BUFFER_num(certs.get()) == 1) {
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hs->new_session->ocsp_response.reset(
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CRYPTO_BUFFER_new_from_CBS(&ocsp_response, ssl->ctx->pool));
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if (hs->new_session->ocsp_response == nullptr) {
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ssl_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
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return false;
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}
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}
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}
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if (have_sct) {
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if (ssl->server || !hs->config->signed_cert_timestamps_enabled) {
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OPENSSL_PUT_ERROR(SSL, SSL_R_UNEXPECTED_EXTENSION);
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ssl_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_UNSUPPORTED_EXTENSION);
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return false;
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}
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if (!ssl_is_sct_list_valid(&sct)) {
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OPENSSL_PUT_ERROR(SSL, SSL_R_ERROR_PARSING_EXTENSION);
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ssl_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
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return false;
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}
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if (sk_CRYPTO_BUFFER_num(certs.get()) == 1) {
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hs->new_session->signed_cert_timestamp_list.reset(
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CRYPTO_BUFFER_new_from_CBS(&sct, ssl->ctx->pool));
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if (hs->new_session->signed_cert_timestamp_list == nullptr) {
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ssl_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
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return false;
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}
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}
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}
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}
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// Store a null certificate list rather than an empty one if the peer didn't
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// send certificates.
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if (sk_CRYPTO_BUFFER_num(certs.get()) == 0) {
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certs.reset();
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}
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hs->peer_pubkey = std::move(pkey);
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hs->new_session->certs = std::move(certs);
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if (!ssl->ctx->x509_method->session_cache_objects(hs->new_session.get())) {
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OPENSSL_PUT_ERROR(SSL, SSL_R_DECODE_ERROR);
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ssl_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
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return false;
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}
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if (sk_CRYPTO_BUFFER_num(hs->new_session->certs.get()) == 0) {
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if (!allow_anonymous) {
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OPENSSL_PUT_ERROR(SSL, SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
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ssl_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_CERTIFICATE_REQUIRED);
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return false;
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}
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// OpenSSL returns X509_V_OK when no certificates are requested. This is
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// classed by them as a bug, but it's assumed by at least NGINX.
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hs->new_session->verify_result = X509_V_OK;
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// No certificate, so nothing more to do.
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return true;
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}
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hs->new_session->peer_sha256_valid = retain_sha256;
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return true;
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}
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bool tls13_process_certificate_verify(SSL_HANDSHAKE *hs, const SSLMessage &msg) {
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SSL *const ssl = hs->ssl;
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if (hs->peer_pubkey == NULL) {
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OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR);
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return false;
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}
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CBS body = msg.body, signature;
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uint16_t signature_algorithm;
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if (!CBS_get_u16(&body, &signature_algorithm) ||
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!CBS_get_u16_length_prefixed(&body, &signature) ||
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CBS_len(&body) != 0) {
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OPENSSL_PUT_ERROR(SSL, SSL_R_DECODE_ERROR);
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ssl_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
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return false;
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}
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uint8_t alert = SSL_AD_DECODE_ERROR;
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if (!tls12_check_peer_sigalg(ssl, &alert, signature_algorithm)) {
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ssl_send_alert(ssl, SSL3_AL_FATAL, alert);
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return false;
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}
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hs->new_session->peer_signature_algorithm = signature_algorithm;
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Array<uint8_t> input;
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if (!tls13_get_cert_verify_signature_input(
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hs, &input,
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ssl->server ? ssl_cert_verify_client : ssl_cert_verify_server)) {
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ssl_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
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return false;
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}
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if (!ssl_public_key_verify(ssl, signature, signature_algorithm,
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||
|
hs->peer_pubkey.get(), input)) {
|
||
|
OPENSSL_PUT_ERROR(SSL, SSL_R_BAD_SIGNATURE);
|
||
|
ssl_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_DECRYPT_ERROR);
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
return true;
|
||
|
}
|
||
|
|
||
|
bool tls13_process_finished(SSL_HANDSHAKE *hs, const SSLMessage &msg,
|
||
|
bool use_saved_value) {
|
||
|
SSL *const ssl = hs->ssl;
|
||
|
uint8_t verify_data_buf[EVP_MAX_MD_SIZE];
|
||
|
Span<const uint8_t> verify_data;
|
||
|
if (use_saved_value) {
|
||
|
assert(ssl->server);
|
||
|
verify_data = hs->expected_client_finished();
|
||
|
} else {
|
||
|
size_t len;
|
||
|
if (!tls13_finished_mac(hs, verify_data_buf, &len, !ssl->server)) {
|
||
|
return false;
|
||
|
}
|
||
|
verify_data = MakeConstSpan(verify_data_buf, len);
|
||
|
}
|
||
|
|
||
|
bool finished_ok =
|
||
|
CBS_mem_equal(&msg.body, verify_data.data(), verify_data.size());
|
||
|
#if defined(BORINGSSL_UNSAFE_FUZZER_MODE)
|
||
|
finished_ok = true;
|
||
|
#endif
|
||
|
if (!finished_ok) {
|
||
|
ssl_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_DECRYPT_ERROR);
|
||
|
OPENSSL_PUT_ERROR(SSL, SSL_R_DIGEST_CHECK_FAILED);
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
return true;
|
||
|
}
|
||
|
|
||
|
bool tls13_add_certificate(SSL_HANDSHAKE *hs) {
|
||
|
SSL *const ssl = hs->ssl;
|
||
|
CERT *const cert = hs->config->cert.get();
|
||
|
DC *const dc = cert->dc.get();
|
||
|
|
||
|
ScopedCBB cbb;
|
||
|
CBB *body, body_storage, certificate_list;
|
||
|
|
||
|
if (hs->cert_compression_negotiated) {
|
||
|
if (!CBB_init(cbb.get(), 1024)) {
|
||
|
return false;
|
||
|
}
|
||
|
body = cbb.get();
|
||
|
} else {
|
||
|
body = &body_storage;
|
||
|
if (!ssl->method->init_message(ssl, cbb.get(), body, SSL3_MT_CERTIFICATE)) {
|
||
|
return false;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
if (// The request context is always empty in the handshake.
|
||
|
!CBB_add_u8(body, 0) ||
|
||
|
!CBB_add_u24_length_prefixed(body, &certificate_list)) {
|
||
|
OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR);
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
if (!ssl_has_certificate(hs)) {
|
||
|
return ssl_add_message_cbb(ssl, cbb.get());
|
||
|
}
|
||
|
|
||
|
CRYPTO_BUFFER *leaf_buf = sk_CRYPTO_BUFFER_value(cert->chain.get(), 0);
|
||
|
CBB leaf, extensions;
|
||
|
if (!CBB_add_u24_length_prefixed(&certificate_list, &leaf) ||
|
||
|
!CBB_add_bytes(&leaf, CRYPTO_BUFFER_data(leaf_buf),
|
||
|
CRYPTO_BUFFER_len(leaf_buf)) ||
|
||
|
!CBB_add_u16_length_prefixed(&certificate_list, &extensions)) {
|
||
|
OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR);
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
if (hs->scts_requested && cert->signed_cert_timestamp_list != nullptr) {
|
||
|
CBB contents;
|
||
|
if (!CBB_add_u16(&extensions, TLSEXT_TYPE_certificate_timestamp) ||
|
||
|
!CBB_add_u16_length_prefixed(&extensions, &contents) ||
|
||
|
!CBB_add_bytes(
|
||
|
&contents,
|
||
|
CRYPTO_BUFFER_data(cert->signed_cert_timestamp_list.get()),
|
||
|
CRYPTO_BUFFER_len(cert->signed_cert_timestamp_list.get())) ||
|
||
|
!CBB_flush(&extensions)) {
|
||
|
OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR);
|
||
|
return false;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
if (hs->ocsp_stapling_requested && cert->ocsp_response != NULL) {
|
||
|
CBB contents, ocsp_response;
|
||
|
if (!CBB_add_u16(&extensions, TLSEXT_TYPE_status_request) ||
|
||
|
!CBB_add_u16_length_prefixed(&extensions, &contents) ||
|
||
|
!CBB_add_u8(&contents, TLSEXT_STATUSTYPE_ocsp) ||
|
||
|
!CBB_add_u24_length_prefixed(&contents, &ocsp_response) ||
|
||
|
!CBB_add_bytes(&ocsp_response,
|
||
|
CRYPTO_BUFFER_data(cert->ocsp_response.get()),
|
||
|
CRYPTO_BUFFER_len(cert->ocsp_response.get())) ||
|
||
|
!CBB_flush(&extensions)) {
|
||
|
OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR);
|
||
|
return false;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
if (ssl_signing_with_dc(hs)) {
|
||
|
const CRYPTO_BUFFER *raw = dc->raw.get();
|
||
|
CBB child;
|
||
|
if (!CBB_add_u16(&extensions, TLSEXT_TYPE_delegated_credential) ||
|
||
|
!CBB_add_u16_length_prefixed(&extensions, &child) ||
|
||
|
!CBB_add_bytes(&child, CRYPTO_BUFFER_data(raw),
|
||
|
CRYPTO_BUFFER_len(raw)) ||
|
||
|
!CBB_flush(&extensions)) {
|
||
|
OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR);
|
||
|
return 0;
|
||
|
}
|
||
|
ssl->s3->delegated_credential_used = true;
|
||
|
}
|
||
|
|
||
|
for (size_t i = 1; i < sk_CRYPTO_BUFFER_num(cert->chain.get()); i++) {
|
||
|
CRYPTO_BUFFER *cert_buf = sk_CRYPTO_BUFFER_value(cert->chain.get(), i);
|
||
|
CBB child;
|
||
|
if (!CBB_add_u24_length_prefixed(&certificate_list, &child) ||
|
||
|
!CBB_add_bytes(&child, CRYPTO_BUFFER_data(cert_buf),
|
||
|
CRYPTO_BUFFER_len(cert_buf)) ||
|
||
|
!CBB_add_u16(&certificate_list, 0 /* no extensions */)) {
|
||
|
OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR);
|
||
|
return false;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
if (!hs->cert_compression_negotiated) {
|
||
|
return ssl_add_message_cbb(ssl, cbb.get());
|
||
|
}
|
||
|
|
||
|
Array<uint8_t> msg;
|
||
|
if (!CBBFinishArray(cbb.get(), &msg)) {
|
||
|
OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR);
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
const CertCompressionAlg *alg = nullptr;
|
||
|
for (const auto *candidate : ssl->ctx->cert_compression_algs.get()) {
|
||
|
if (candidate->alg_id == hs->cert_compression_alg_id) {
|
||
|
alg = candidate;
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
if (alg == nullptr || alg->compress == nullptr) {
|
||
|
OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR);
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
CBB compressed;
|
||
|
body = &body_storage;
|
||
|
if (!ssl->method->init_message(ssl, cbb.get(), body,
|
||
|
SSL3_MT_COMPRESSED_CERTIFICATE) ||
|
||
|
!CBB_add_u16(body, hs->cert_compression_alg_id) ||
|
||
|
!CBB_add_u24(body, msg.size()) ||
|
||
|
!CBB_add_u24_length_prefixed(body, &compressed) ||
|
||
|
!alg->compress(ssl, &compressed, msg.data(), msg.size()) ||
|
||
|
!ssl_add_message_cbb(ssl, cbb.get())) {
|
||
|
OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR);
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
return true;
|
||
|
}
|
||
|
|
||
|
enum ssl_private_key_result_t tls13_add_certificate_verify(SSL_HANDSHAKE *hs) {
|
||
|
SSL *const ssl = hs->ssl;
|
||
|
uint16_t signature_algorithm;
|
||
|
if (!tls1_choose_signature_algorithm(hs, &signature_algorithm)) {
|
||
|
ssl_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
|
||
|
return ssl_private_key_failure;
|
||
|
}
|
||
|
|
||
|
ScopedCBB cbb;
|
||
|
CBB body;
|
||
|
if (!ssl->method->init_message(ssl, cbb.get(), &body,
|
||
|
SSL3_MT_CERTIFICATE_VERIFY) ||
|
||
|
!CBB_add_u16(&body, signature_algorithm)) {
|
||
|
OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR);
|
||
|
return ssl_private_key_failure;
|
||
|
}
|
||
|
|
||
|
// Sign the digest.
|
||
|
CBB child;
|
||
|
const size_t max_sig_len = EVP_PKEY_size(hs->local_pubkey.get());
|
||
|
uint8_t *sig;
|
||
|
size_t sig_len;
|
||
|
if (!CBB_add_u16_length_prefixed(&body, &child) ||
|
||
|
!CBB_reserve(&child, &sig, max_sig_len)) {
|
||
|
ssl_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
|
||
|
return ssl_private_key_failure;
|
||
|
}
|
||
|
|
||
|
Array<uint8_t> msg;
|
||
|
if (!tls13_get_cert_verify_signature_input(
|
||
|
hs, &msg,
|
||
|
ssl->server ? ssl_cert_verify_server : ssl_cert_verify_client)) {
|
||
|
ssl_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
|
||
|
return ssl_private_key_failure;
|
||
|
}
|
||
|
|
||
|
enum ssl_private_key_result_t sign_result = ssl_private_key_sign(
|
||
|
hs, sig, &sig_len, max_sig_len, signature_algorithm, msg);
|
||
|
if (sign_result != ssl_private_key_success) {
|
||
|
return sign_result;
|
||
|
}
|
||
|
|
||
|
if (!CBB_did_write(&child, sig_len) ||
|
||
|
!ssl_add_message_cbb(ssl, cbb.get())) {
|
||
|
return ssl_private_key_failure;
|
||
|
}
|
||
|
|
||
|
return ssl_private_key_success;
|
||
|
}
|
||
|
|
||
|
bool tls13_add_finished(SSL_HANDSHAKE *hs) {
|
||
|
SSL *const ssl = hs->ssl;
|
||
|
size_t verify_data_len;
|
||
|
uint8_t verify_data[EVP_MAX_MD_SIZE];
|
||
|
|
||
|
if (!tls13_finished_mac(hs, verify_data, &verify_data_len, ssl->server)) {
|
||
|
ssl_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
|
||
|
OPENSSL_PUT_ERROR(SSL, SSL_R_DIGEST_CHECK_FAILED);
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
ScopedCBB cbb;
|
||
|
CBB body;
|
||
|
if (!ssl->method->init_message(ssl, cbb.get(), &body, SSL3_MT_FINISHED) ||
|
||
|
!CBB_add_bytes(&body, verify_data, verify_data_len) ||
|
||
|
!ssl_add_message_cbb(ssl, cbb.get())) {
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
return true;
|
||
|
}
|
||
|
|
||
|
bool tls13_add_key_update(SSL *ssl, int update_requested) {
|
||
|
ScopedCBB cbb;
|
||
|
CBB body_cbb;
|
||
|
if (!ssl->method->init_message(ssl, cbb.get(), &body_cbb,
|
||
|
SSL3_MT_KEY_UPDATE) ||
|
||
|
!CBB_add_u8(&body_cbb, update_requested) ||
|
||
|
!ssl_add_message_cbb(ssl, cbb.get()) ||
|
||
|
!tls13_rotate_traffic_key(ssl, evp_aead_seal)) {
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
// Suppress KeyUpdate acknowledgments until this change is written to the
|
||
|
// wire. This prevents us from accumulating write obligations when read and
|
||
|
// write progress at different rates. See RFC 8446, section 4.6.3.
|
||
|
ssl->s3->key_update_pending = true;
|
||
|
|
||
|
return true;
|
||
|
}
|
||
|
|
||
|
static bool tls13_receive_key_update(SSL *ssl, const SSLMessage &msg) {
|
||
|
CBS body = msg.body;
|
||
|
uint8_t key_update_request;
|
||
|
if (!CBS_get_u8(&body, &key_update_request) ||
|
||
|
CBS_len(&body) != 0 ||
|
||
|
(key_update_request != SSL_KEY_UPDATE_NOT_REQUESTED &&
|
||
|
key_update_request != SSL_KEY_UPDATE_REQUESTED)) {
|
||
|
OPENSSL_PUT_ERROR(SSL, SSL_R_DECODE_ERROR);
|
||
|
ssl_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
if (!tls13_rotate_traffic_key(ssl, evp_aead_open)) {
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
// Acknowledge the KeyUpdate
|
||
|
if (key_update_request == SSL_KEY_UPDATE_REQUESTED &&
|
||
|
!ssl->s3->key_update_pending &&
|
||
|
!tls13_add_key_update(ssl, SSL_KEY_UPDATE_NOT_REQUESTED)) {
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
return true;
|
||
|
}
|
||
|
|
||
|
bool tls13_post_handshake(SSL *ssl, const SSLMessage &msg) {
|
||
|
if (msg.type == SSL3_MT_KEY_UPDATE) {
|
||
|
ssl->s3->key_update_count++;
|
||
|
if (ssl->quic_method != nullptr ||
|
||
|
ssl->s3->key_update_count > kMaxKeyUpdates) {
|
||
|
OPENSSL_PUT_ERROR(SSL, SSL_R_TOO_MANY_KEY_UPDATES);
|
||
|
ssl_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE);
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
return tls13_receive_key_update(ssl, msg);
|
||
|
}
|
||
|
|
||
|
ssl->s3->key_update_count = 0;
|
||
|
|
||
|
if (msg.type == SSL3_MT_NEW_SESSION_TICKET && !ssl->server) {
|
||
|
return tls13_process_new_session_ticket(ssl, msg);
|
||
|
}
|
||
|
|
||
|
ssl_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE);
|
||
|
OPENSSL_PUT_ERROR(SSL, SSL_R_UNEXPECTED_MESSAGE);
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
BSSL_NAMESPACE_END
|