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

net/quic/crypto/aead_base_encrypter.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 <string.h>
-
-#include <memory>
-
-#include "net/quic/crypto/aead_base_encrypter.h"
-#include "net/quic/quic_flags.h"
-#include "net/quic/quic_utils.h"
-
-using base::StringPiece;
-
-namespace net {
-
-namespace {
-
-// The maximum size in bytes of the nonce, including 8 bytes of sequence number.
-// ChaCha20 uses only the 8 byte sequence number and AES-GCM uses 12 bytes.
-const size_t kMaxNonceSize = 12;
-
-// In debug builds only, log OpenSSL error stack. Then clear OpenSSL error
-// stack.
-void DLogOpenSslErrors() {
-#ifdef NDEBUG
-  while (ERR_get_error()) {
-  }
-#else
-  while (unsigned long error = ERR_get_error()) {
-    char buf[120];
-    ERR_error_string_n(error, buf, arraysize(buf));
-    DLOG(ERROR) << "OpenSSL error: " << buf;
-  }
-#endif
-}
-
-}  // namespace
-
-AeadBaseEncrypter::AeadBaseEncrypter(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) {
-  DCHECK_LE(key_size_, sizeof(key_));
-  DCHECK_LE(nonce_prefix_size_, sizeof(nonce_prefix_));
-  DCHECK_GE(kMaxNonceSize, nonce_prefix_size_);
-}
-
-AeadBaseEncrypter::~AeadBaseEncrypter() {}
-
-bool AeadBaseEncrypter::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 AeadBaseEncrypter::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 AeadBaseEncrypter::Encrypt(StringPiece nonce,
-                                StringPiece associated_data,
-                                StringPiece plaintext,
-                                unsigned char* output) {
-  if (nonce.size() != nonce_prefix_size_ + sizeof(QuicPacketNumber)) {
-    return false;
-  }
-
-  size_t ciphertext_len;
-  if (!EVP_AEAD_CTX_seal(
-          ctx_.get(), output, &ciphertext_len,
-          plaintext.size() + auth_tag_size_,
-          reinterpret_cast<const uint8_t*>(nonce.data()), nonce.size(),
-          reinterpret_cast<const uint8_t*>(plaintext.data()), plaintext.size(),
-          reinterpret_cast<const uint8_t*>(associated_data.data()),
-          associated_data.size())) {
-    DLogOpenSslErrors();
-    return false;
-  }
-
-  return true;
-}
-
-bool AeadBaseEncrypter::EncryptPacket(QuicPathId path_id,
-                                      QuicPacketNumber packet_number,
-                                      StringPiece associated_data,
-                                      StringPiece plaintext,
-                                      char* output,
-                                      size_t* output_length,
-                                      size_t max_output_length) {
-  size_t ciphertext_size = GetCiphertextSize(plaintext.length());
-  if (max_output_length < ciphertext_size) {
-    return false;
-  }
-  // TODO(ianswett): Introduce a check to ensure that we don't encrypt with the
-  // same packet number twice.
-  const size_t nonce_size = nonce_prefix_size_ + sizeof(packet_number);
-  ALIGNAS(4) char nonce_buffer[kMaxNonceSize];
-  memcpy(nonce_buffer, nonce_prefix_, nonce_prefix_size_);
-  uint64_t path_id_packet_number =
-      QuicUtils::PackPathIdAndPacketNumber(path_id, packet_number);
-  memcpy(nonce_buffer + nonce_prefix_size_, &path_id_packet_number,
-         sizeof(path_id_packet_number));
-
-  if (!Encrypt(StringPiece(nonce_buffer, nonce_size), associated_data,
-               plaintext, reinterpret_cast<unsigned char*>(output))) {
-    return false;
-  }
-  *output_length = ciphertext_size;
-  return true;
-}
-
-size_t AeadBaseEncrypter::GetKeySize() const {
-  return key_size_;
-}
-
-size_t AeadBaseEncrypter::GetNoncePrefixSize() const {
-  return nonce_prefix_size_;
-}
-
-size_t AeadBaseEncrypter::GetMaxPlaintextSize(size_t ciphertext_size) const {
-  return ciphertext_size - auth_tag_size_;
-}
-
-size_t AeadBaseEncrypter::GetCiphertextSize(size_t plaintext_size) const {
-  return plaintext_size + auth_tag_size_;
-}
-
-StringPiece AeadBaseEncrypter::GetKey() const {
-  return StringPiece(reinterpret_cast<const char*>(key_), key_size_);
-}
-
-StringPiece AeadBaseEncrypter::GetNoncePrefix() const {
-  if (nonce_prefix_size_ == 0) {
-    return StringPiece();
-  }
-  return StringPiece(reinterpret_cast<const char*>(nonce_prefix_),
-                     nonce_prefix_size_);
-}
-
-}  // namespace net