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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "net/third_party/quiche/src/quic/core/crypto/quic_decrypter.h"
#include <string>
#include <utility>
#include "third_party/boringssl/src/include/openssl/tls1.h"
#include "net/third_party/quiche/src/quic/core/crypto/aes_128_gcm_12_decrypter.h"
#include "net/third_party/quiche/src/quic/core/crypto/aes_128_gcm_decrypter.h"
#include "net/third_party/quiche/src/quic/core/crypto/aes_256_gcm_decrypter.h"
#include "net/third_party/quiche/src/quic/core/crypto/chacha20_poly1305_decrypter.h"
#include "net/third_party/quiche/src/quic/core/crypto/chacha20_poly1305_tls_decrypter.h"
#include "net/third_party/quiche/src/quic/core/crypto/crypto_protocol.h"
#include "net/third_party/quiche/src/quic/core/crypto/null_decrypter.h"
#include "net/third_party/quiche/src/quic/core/crypto/quic_hkdf.h"
#include "net/third_party/quiche/src/quic/platform/api/quic_bug_tracker.h"
#include "net/third_party/quiche/src/quic/platform/api/quic_logging.h"
#include "net/third_party/quiche/src/common/platform/api/quiche_string_piece.h"
namespace quic {
// static
std::unique_ptr<QuicDecrypter> QuicDecrypter::Create(
const ParsedQuicVersion& version,
QuicTag algorithm) {
switch (algorithm) {
case kAESG:
if (version.UsesInitialObfuscators()) {
return std::make_unique<Aes128GcmDecrypter>();
} else {
return std::make_unique<Aes128Gcm12Decrypter>();
}
case kCC20:
if (version.UsesInitialObfuscators()) {
return std::make_unique<ChaCha20Poly1305TlsDecrypter>();
} else {
return std::make_unique<ChaCha20Poly1305Decrypter>();
}
default:
QUIC_LOG(FATAL) << "Unsupported algorithm: " << algorithm;
return nullptr;
}
}
// static
std::unique_ptr<QuicDecrypter> QuicDecrypter::CreateFromCipherSuite(
uint32_t cipher_suite) {
switch (cipher_suite) {
case TLS1_CK_AES_128_GCM_SHA256:
return std::make_unique<Aes128GcmDecrypter>();
case TLS1_CK_AES_256_GCM_SHA384:
return std::make_unique<Aes256GcmDecrypter>();
case TLS1_CK_CHACHA20_POLY1305_SHA256:
return std::make_unique<ChaCha20Poly1305TlsDecrypter>();
default:
QUIC_BUG << "TLS cipher suite is unknown to QUIC";
return nullptr;
}
}
// static
void QuicDecrypter::DiversifyPreliminaryKey(
quiche::QuicheStringPiece preliminary_key,
quiche::QuicheStringPiece nonce_prefix,
const DiversificationNonce& nonce,
size_t key_size,
size_t nonce_prefix_size,
std::string* out_key,
std::string* out_nonce_prefix) {
QuicHKDF hkdf((std::string(preliminary_key)) + (std::string(nonce_prefix)),
quiche::QuicheStringPiece(nonce.data(), nonce.size()),
"QUIC key diversification", 0, key_size, 0, nonce_prefix_size,
0);
*out_key = std::string(hkdf.server_write_key());
*out_nonce_prefix = std::string(hkdf.server_write_iv());
}
} // namespace quic
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