Move shared files in net/quic/ into net/quic/core/

net/quic/crypto/aead_base_decrypter.cc

-// Copyright (c) 2013 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 <openssl/err.h>
-#include <openssl/evp.h>
-
-#include <memory>
-
-#include "net/quic/crypto/aead_base_decrypter.h"
-#include "net/quic/quic_bug_tracker.h"
-#include "net/quic/quic_flags.h"
-#include "net/quic/quic_utils.h"
-
-using base::StringPiece;
-using std::string;
-
-namespace net {
-
-namespace {
-
-// Clear OpenSSL error stack.
-void ClearOpenSslErrors() {
-  while (ERR_get_error()) {
-  }
-}
-
-// In debug builds only, log OpenSSL error stack. Then clear OpenSSL error
-// stack.
-void DLogOpenSslErrors() {
-#ifdef NDEBUG
-  ClearOpenSslErrors();
-#else
-  while (uint32_t error = ERR_get_error()) {
-    char buf[120];
-    ERR_error_string_n(error, buf, arraysize(buf));
-    DLOG(ERROR) << "OpenSSL error: " << buf;
-  }
-#endif
-}
-
-}  // namespace
-
-AeadBaseDecrypter::AeadBaseDecrypter(const EVP_AEAD* aead_alg,
-                                     size_t key_size,
-                                     size_t auth_tag_size,
-                                     size_t nonce_prefix_size)
-    : aead_alg_(aead_alg),
-      key_size_(key_size),
-      auth_tag_size_(auth_tag_size),
-      nonce_prefix_size_(nonce_prefix_size),
-      have_preliminary_key_(false) {
-  DCHECK_GT(256u, key_size);
-  DCHECK_GT(256u, auth_tag_size);
-  DCHECK_GT(256u, nonce_prefix_size);
-  DCHECK_LE(key_size_, sizeof(key_));
-  DCHECK_LE(nonce_prefix_size_, sizeof(nonce_prefix_));
-}
-
-AeadBaseDecrypter::~AeadBaseDecrypter() {}
-
-bool AeadBaseDecrypter::SetKey(StringPiece key) {
-  DCHECK_EQ(key.size(), key_size_);
-  if (key.size() != key_size_) {
-    return false;
-  }
-  memcpy(key_, key.data(), key.size());
-
-  EVP_AEAD_CTX_cleanup(ctx_.get());
-  if (!EVP_AEAD_CTX_init(ctx_.get(), aead_alg_, key_, key_size_, auth_tag_size_,
-                         nullptr)) {
-    DLogOpenSslErrors();
-    return false;
-  }
-
-  return true;
-}
-
-bool AeadBaseDecrypter::SetNoncePrefix(StringPiece nonce_prefix) {
-  DCHECK_EQ(nonce_prefix.size(), nonce_prefix_size_);
-  if (nonce_prefix.size() != nonce_prefix_size_) {
-    return false;
-  }
-  memcpy(nonce_prefix_, nonce_prefix.data(), nonce_prefix.size());
-  return true;
-}
-
-bool AeadBaseDecrypter::SetPreliminaryKey(StringPiece key) {
-  DCHECK(!have_preliminary_key_);
-  SetKey(key);
-  have_preliminary_key_ = true;
-
-  return true;
-}
-
-bool AeadBaseDecrypter::SetDiversificationNonce(DiversificationNonce nonce) {
-  if (!have_preliminary_key_) {
-    return true;
-  }
-
-  string key, nonce_prefix;
-  DiversifyPreliminaryKey(
-      StringPiece(reinterpret_cast<const char*>(key_), key_size_),
-      StringPiece(reinterpret_cast<const char*>(nonce_prefix_),
-                  nonce_prefix_size_),
-      nonce, key_size_, nonce_prefix_size_, &key, &nonce_prefix);
-
-  if (!SetKey(key) || !SetNoncePrefix(nonce_prefix)) {
-    DCHECK(false);
-    return false;
-  }
-
-  have_preliminary_key_ = false;
-  return true;
-}
-
-bool AeadBaseDecrypter::DecryptPacket(QuicPathId path_id,
-                                      QuicPacketNumber packet_number,
-                                      StringPiece associated_data,
-                                      StringPiece ciphertext,
-                                      char* output,
-                                      size_t* output_length,
-                                      size_t max_output_length) {
-  if (ciphertext.length() < auth_tag_size_) {
-    return false;
-  }
-
-  if (have_preliminary_key_) {
-    QUIC_BUG << "Unable to decrypt while key diversification is pending";
-    return false;
-  }
-
-  uint8_t nonce[sizeof(nonce_prefix_) + sizeof(packet_number)];
-  const size_t nonce_size = nonce_prefix_size_ + sizeof(packet_number);
-  memcpy(nonce, nonce_prefix_, nonce_prefix_size_);
-  uint64_t path_id_packet_number =
-      QuicUtils::PackPathIdAndPacketNumber(path_id, packet_number);
-  memcpy(nonce + nonce_prefix_size_, &path_id_packet_number,
-         sizeof(path_id_packet_number));
-  if (!EVP_AEAD_CTX_open(
-          ctx_.get(), reinterpret_cast<uint8_t*>(output), output_length,
-          max_output_length, reinterpret_cast<const uint8_t*>(nonce),
-          nonce_size, reinterpret_cast<const uint8_t*>(ciphertext.data()),
-          ciphertext.size(),
-          reinterpret_cast<const uint8_t*>(associated_data.data()),
-          associated_data.size())) {
-    // Because QuicFramer does trial decryption, decryption errors are expected
-    // when encryption level changes. So we don't log decryption errors.
-    ClearOpenSslErrors();
-    return false;
-  }
-  return true;
-}
-
-StringPiece AeadBaseDecrypter::GetKey() const {
-  return StringPiece(reinterpret_cast<const char*>(key_), key_size_);
-}
-
-StringPiece AeadBaseDecrypter::GetNoncePrefix() const {
-  if (nonce_prefix_size_ == 0) {
-    return StringPiece();
-  }
-  return StringPiece(reinterpret_cast<const char*>(nonce_prefix_),
-                     nonce_prefix_size_);
-}
-
-}  // namespace net