net/quic/p2p/quic_p2p_crypto_config.cc

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "net/quic/p2p/quic_p2p_crypto_config.h"
   6
   7 #include "net/quic/crypto/crypto_handshake.h"
   8 #include "net/quic/crypto/crypto_utils.h"
   9
  10 namespace net {
  11
  12 QuicP2PCryptoConfig::QuicP2PCryptoConfig(const std::string& shared_key)
  13     : shared_key_(shared_key) {}
  14
  15 QuicP2PCryptoConfig::~QuicP2PCryptoConfig() {}
  16
  17 bool QuicP2PCryptoConfig::GetNegotiatedParameters(
  18     Perspective perspective,
  19     QuicCryptoNegotiatedParameters* out_params) {
  20   out_params->forward_secure_premaster_secret = shared_key_;
  21   out_params->aead = aead_;
  22   out_params->hkdf_input_suffix = hkdf_input_suffix_;
  23
  24   std::string hkdf_input;
  25   const size_t label_len = strlen(QuicCryptoConfig::kForwardSecureLabel) + 1;
  26   hkdf_input.reserve(label_len + out_params->hkdf_input_suffix.size());
  27   hkdf_input.append(QuicCryptoConfig::kForwardSecureLabel, label_len);
  28   hkdf_input.append(out_params->hkdf_input_suffix);
  29
  30   if (!CryptoUtils::DeriveKeys(
  31           out_params->forward_secure_premaster_secret, out_params->aead,
  32           out_params->client_nonce, out_params->server_nonce, hkdf_input,
  33           perspective, &out_params->forward_secure_crypters,
  34           &out_params->subkey_secret)) {
  35     return false;
  36   }
  37
  38   return true;
  39 }
  40
  41 }  // namespace net