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

net/quic/crypto/crypto_utils.cc

Index: net/quic/crypto/crypto_utils.cc
diff --git a/net/quic/crypto/crypto_utils.cc b/net/quic/crypto/crypto_utils.cc
deleted file mode 100644
index 6ec4e5e8aae73f2564690eb7effd83b1f0c3c363..0000000000000000000000000000000000000000
--- a/net/quic/crypto/crypto_utils.cc
+++ /dev/null
@@ -1,340 +0,0 @@
-// 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 "net/quic/crypto/crypto_utils.h"
-
-#include <memory>
-
-#include "crypto/hkdf.h"
-#include "crypto/secure_hash.h"
-#include "net/base/url_util.h"
-#include "net/quic/crypto/crypto_handshake.h"
-#include "net/quic/crypto/crypto_protocol.h"
-#include "net/quic/crypto/quic_decrypter.h"
-#include "net/quic/crypto/quic_encrypter.h"
-#include "net/quic/crypto/quic_random.h"
-#include "net/quic/quic_bug_tracker.h"
-#include "net/quic/quic_time.h"
-#include "net/quic/quic_utils.h"
-#include "url/url_canon.h"
-
-using base::StringPiece;
-using std::numeric_limits;
-using std::string;
-
-namespace net {
-
-// static
-void CryptoUtils::GenerateNonce(QuicWallTime now,
-                                QuicRandom* random_generator,
-                                StringPiece orbit,
-                                string* nonce) {
-  // a 4-byte timestamp + 28 random bytes.
-  nonce->reserve(kNonceSize);
-  nonce->resize(kNonceSize);
-
-  uint32_t gmt_unix_time = static_cast<uint32_t>(now.ToUNIXSeconds());
-  // The time in the nonce must be encoded in big-endian because the
-  // strike-register depends on the nonces being ordered by time.
-  (*nonce)[0] = static_cast<char>(gmt_unix_time >> 24);
-  (*nonce)[1] = static_cast<char>(gmt_unix_time >> 16);
-  (*nonce)[2] = static_cast<char>(gmt_unix_time >> 8);
-  (*nonce)[3] = static_cast<char>(gmt_unix_time);
-  size_t bytes_written = 4;
-
-  if (orbit.size() == 8) {
-    memcpy(&(*nonce)[bytes_written], orbit.data(), orbit.size());
-    bytes_written += orbit.size();
-  }
-
-  random_generator->RandBytes(&(*nonce)[bytes_written],
-                              kNonceSize - bytes_written);
-}
-
-// static
-bool CryptoUtils::IsValidSNI(StringPiece sni) {
-  // TODO(rtenneti): Support RFC2396 hostname.
-  // NOTE: Microsoft does NOT enforce this spec, so if we throw away hostnames
-  // based on the above spec, we may be losing some hostnames that windows
-  // would consider valid. By far the most common hostname character NOT
-  // accepted by the above spec is '_'.
-  url::CanonHostInfo host_info;
-  string canonicalized_host(CanonicalizeHost(sni.as_string(), &host_info));
-  return !host_info.IsIPAddress() &&
-         IsCanonicalizedHostCompliant(canonicalized_host) &&
-         sni.find_last_of('.') != string::npos;
-}
-
-// static
-string CryptoUtils::NormalizeHostname(const char* hostname) {
-  url::CanonHostInfo host_info;
-  string host(CanonicalizeHost(hostname, &host_info));
-
-  // Walk backwards over the string, stopping at the first trailing dot.
-  size_t host_end = host.length();
-  while (host_end != 0 && host[host_end - 1] == '.') {
-    host_end--;
-  }
-
-  // Erase the trailing dots.
-  if (host_end != host.length()) {
-    host.erase(host_end, host.length() - host_end);
-  }
-  return host;
-}
-
-// static
-bool CryptoUtils::DeriveKeys(StringPiece premaster_secret,
-                             QuicTag aead,
-                             StringPiece client_nonce,
-                             StringPiece server_nonce,
-                             const string& hkdf_input,
-                             Perspective perspective,
-                             Diversification diversification,
-                             CrypterPair* crypters,
-                             string* subkey_secret) {
-  crypters->encrypter.reset(QuicEncrypter::Create(aead));
-  crypters->decrypter.reset(QuicDecrypter::Create(aead));
-  size_t key_bytes = crypters->encrypter->GetKeySize();
-  size_t nonce_prefix_bytes = crypters->encrypter->GetNoncePrefixSize();
-  size_t subkey_secret_bytes =
-      subkey_secret == nullptr ? 0 : premaster_secret.length();
-
-  StringPiece nonce = client_nonce;
-  string nonce_storage;
-  if (!server_nonce.empty()) {
-    nonce_storage = client_nonce.as_string() + server_nonce.as_string();
-    nonce = nonce_storage;
-  }
-
-  crypto::HKDF hkdf(premaster_secret, nonce, hkdf_input, key_bytes,
-                    nonce_prefix_bytes, subkey_secret_bytes);
-
-  // Key derivation depends on the key diversification method being employed.
-  // both the client and the server support never doing key diversification.
-  // The server also supports immediate diversification, and the client
-  // supports pending diversification.
-  switch (diversification.mode()) {
-    case Diversification::NEVER: {
-      if (perspective == Perspective::IS_SERVER) {
-        if (!crypters->encrypter->SetKey(hkdf.server_write_key()) ||
-            !crypters->encrypter->SetNoncePrefix(hkdf.server_write_iv()) ||
-            !crypters->decrypter->SetKey(hkdf.client_write_key()) ||
-            !crypters->decrypter->SetNoncePrefix(hkdf.client_write_iv())) {
-          return false;
-        }
-      } else {
-        if (!crypters->encrypter->SetKey(hkdf.client_write_key()) ||
-            !crypters->encrypter->SetNoncePrefix(hkdf.client_write_iv()) ||
-            !crypters->decrypter->SetKey(hkdf.server_write_key()) ||
-            !crypters->decrypter->SetNoncePrefix(hkdf.server_write_iv())) {
-          return false;
-        }
-      }
-      break;
-    }
-    case Diversification::PENDING: {
-      if (perspective == Perspective::IS_SERVER) {
-        QUIC_BUG << "Pending diversification is only for clients.";
-        return false;
-      }
-
-      if (!crypters->encrypter->SetKey(hkdf.client_write_key()) ||
-          !crypters->encrypter->SetNoncePrefix(hkdf.client_write_iv()) ||
-          !crypters->decrypter->SetPreliminaryKey(hkdf.server_write_key()) ||
-          !crypters->decrypter->SetNoncePrefix(hkdf.server_write_iv())) {
-        return false;
-      }
-      break;
-    }
-    case Diversification::NOW: {
-      if (perspective == Perspective::IS_CLIENT) {
-        QUIC_BUG << "Immediate diversification is only for servers.";
-        return false;
-      }
-
-      string key, nonce_prefix;
-      QuicDecrypter::DiversifyPreliminaryKey(
-          hkdf.server_write_key(), hkdf.server_write_iv(),
-          *diversification.nonce(), key_bytes, nonce_prefix_bytes, &key,
-          &nonce_prefix);
-      if (!crypters->decrypter->SetKey(hkdf.client_write_key()) ||
-          !crypters->decrypter->SetNoncePrefix(hkdf.client_write_iv()) ||
-          !crypters->encrypter->SetKey(key) ||
-          !crypters->encrypter->SetNoncePrefix(nonce_prefix)) {
-        return false;
-      }
-      break;
-    }
-    default:
-      DCHECK(false);
-  }
-
-  if (subkey_secret != nullptr) {
-    hkdf.subkey_secret().CopyToString(subkey_secret);
-  }
-
-  return true;
-}
-
-// static
-bool CryptoUtils::ExportKeyingMaterial(StringPiece subkey_secret,
-                                       StringPiece label,
-                                       StringPiece context,
-                                       size_t result_len,
-                                       string* result) {
-  for (size_t i = 0; i < label.length(); i++) {
-    if (label[i] == '\0') {
-      LOG(ERROR) << "ExportKeyingMaterial label may not contain NULs";
-      return false;
-    }
-  }
-  // Create HKDF info input: null-terminated label + length-prefixed context
-  if (context.length() >= numeric_limits<uint32_t>::max()) {
-    LOG(ERROR) << "Context value longer than 2^32";
-    return false;
-  }
-  uint32_t context_length = static_cast<uint32_t>(context.length());
-  string info = label.as_string();
-  info.push_back('\0');
-  info.append(reinterpret_cast<char*>(&context_length), sizeof(context_length));
-  info.append(context.data(), context.length());
-
-  crypto::HKDF hkdf(subkey_secret, StringPiece() /* no salt */, info,
-                    result_len, 0 /* no fixed IV */, 0 /* no subkey secret */);
-  hkdf.client_write_key().CopyToString(result);
-  return true;
-}
-
-// static
-uint64_t CryptoUtils::ComputeLeafCertHash(const std::string& cert) {
-  return QuicUtils::FNV1a_64_Hash(cert.data(), cert.size());
-}
-
-QuicErrorCode CryptoUtils::ValidateServerHello(
-    const CryptoHandshakeMessage& server_hello,
-    const QuicVersionVector& negotiated_versions,
-    string* error_details) {
-  DCHECK(error_details != nullptr);
-
-  if (server_hello.tag() != kSHLO) {
-    *error_details = "Bad tag";
-    return QUIC_INVALID_CRYPTO_MESSAGE_TYPE;
-  }
-
-  const QuicTag* supported_version_tags;
-  size_t num_supported_versions;
-
-  if (server_hello.GetTaglist(kVER, &supported_version_tags,
-                              &num_supported_versions) != QUIC_NO_ERROR) {
-    *error_details = "server hello missing version list";
-    return QUIC_INVALID_CRYPTO_MESSAGE_PARAMETER;
-  }
-  if (!negotiated_versions.empty()) {
-    bool mismatch = num_supported_versions != negotiated_versions.size();
-    for (size_t i = 0; i < num_supported_versions && !mismatch; ++i) {
-      mismatch = QuicTagToQuicVersion(supported_version_tags[i]) !=
-                 negotiated_versions[i];
-    }
-    // The server sent a list of supported versions, and the connection
-    // reports that there was a version negotiation during the handshake.
-    // Ensure that these two lists are identical.
-    if (mismatch) {
-      *error_details = "Downgrade attack detected";
-      return QUIC_VERSION_NEGOTIATION_MISMATCH;
-    }
-  }
-  return QUIC_NO_ERROR;
-}
-
-QuicErrorCode CryptoUtils::ValidateClientHello(
-    const CryptoHandshakeMessage& client_hello,
-    QuicVersion version,
-    const QuicVersionVector& supported_versions,
-    string* error_details) {
-  if (client_hello.tag() != kCHLO) {
-    *error_details = "Bad tag";
-    return QUIC_INVALID_CRYPTO_MESSAGE_TYPE;
-  }
-
-  // If the client's preferred version is not the version we are currently
-  // speaking, then the client went through a version negotiation.  In this
-  // case, we need to make sure that we actually do not support this version
-  // and that it wasn't a downgrade attack.
-  QuicTag client_version_tag;
-  if (client_hello.GetUint32(kVER, &client_version_tag) != QUIC_NO_ERROR) {
-    *error_details = "client hello missing version list";
-    return QUIC_INVALID_CRYPTO_MESSAGE_PARAMETER;
-  }
-  QuicVersion client_version = QuicTagToQuicVersion(client_version_tag);
-  if (client_version != version) {
-    // Just because client_version is a valid version enum doesn't mean that
-    // this server actually supports that version, so we check to see if
-    // it's actually in the supported versions list.
-    for (size_t i = 0; i < supported_versions.size(); ++i) {
-      if (client_version == supported_versions[i]) {
-        *error_details = "Downgrade attack detected";
-        return QUIC_VERSION_NEGOTIATION_MISMATCH;
-      }
-    }
-  }
-  return QUIC_NO_ERROR;
-}
-
-#define RETURN_STRING_LITERAL(x) \
-  case x:                        \
-    return #x
-
-// Returns the name of the HandshakeFailureReason as a char*
-// static
-const char* CryptoUtils::HandshakeFailureReasonToString(
-    HandshakeFailureReason reason) {
-  switch (reason) {
-    RETURN_STRING_LITERAL(HANDSHAKE_OK);
-    RETURN_STRING_LITERAL(CLIENT_NONCE_UNKNOWN_FAILURE);
-    RETURN_STRING_LITERAL(CLIENT_NONCE_INVALID_FAILURE);
-    RETURN_STRING_LITERAL(CLIENT_NONCE_NOT_UNIQUE_FAILURE);
-    RETURN_STRING_LITERAL(CLIENT_NONCE_INVALID_ORBIT_FAILURE);
-    RETURN_STRING_LITERAL(CLIENT_NONCE_INVALID_TIME_FAILURE);
-    RETURN_STRING_LITERAL(CLIENT_NONCE_STRIKE_REGISTER_TIMEOUT);
-    RETURN_STRING_LITERAL(CLIENT_NONCE_STRIKE_REGISTER_FAILURE);
-
-    RETURN_STRING_LITERAL(SERVER_NONCE_DECRYPTION_FAILURE);
-    RETURN_STRING_LITERAL(SERVER_NONCE_INVALID_FAILURE);
-    RETURN_STRING_LITERAL(SERVER_NONCE_NOT_UNIQUE_FAILURE);
-    RETURN_STRING_LITERAL(SERVER_NONCE_INVALID_TIME_FAILURE);
-    RETURN_STRING_LITERAL(SERVER_NONCE_REQUIRED_FAILURE);
-
-    RETURN_STRING_LITERAL(SERVER_CONFIG_INCHOATE_HELLO_FAILURE);
-    RETURN_STRING_LITERAL(SERVER_CONFIG_UNKNOWN_CONFIG_FAILURE);
-
-    RETURN_STRING_LITERAL(SOURCE_ADDRESS_TOKEN_INVALID_FAILURE);
-    RETURN_STRING_LITERAL(SOURCE_ADDRESS_TOKEN_DECRYPTION_FAILURE);
-    RETURN_STRING_LITERAL(SOURCE_ADDRESS_TOKEN_PARSE_FAILURE);
-    RETURN_STRING_LITERAL(SOURCE_ADDRESS_TOKEN_DIFFERENT_IP_ADDRESS_FAILURE);
-    RETURN_STRING_LITERAL(SOURCE_ADDRESS_TOKEN_CLOCK_SKEW_FAILURE);
-    RETURN_STRING_LITERAL(SOURCE_ADDRESS_TOKEN_EXPIRED_FAILURE);
-
-    RETURN_STRING_LITERAL(INVALID_EXPECTED_LEAF_CERTIFICATE);
-    RETURN_STRING_LITERAL(MAX_FAILURE_REASON);
-  }
-  // Return a default value so that we return this when |reason| doesn't match
-  // any HandshakeFailureReason.. This can happen when the message by the peer
-  // (attacker) has invalid reason.
-  return "INVALID_HANDSHAKE_FAILURE_REASON";
-}
-
-// static
-void CryptoUtils::HashHandshakeMessage(const CryptoHandshakeMessage& message,
-                                       string* output) {
-  const QuicData& serialized = message.GetSerialized();
-  std::unique_ptr<crypto::SecureHash> hash(
-      crypto::SecureHash::Create(crypto::SecureHash::SHA256));
-  hash->Update(serialized.data(), serialized.length());
-  uint8_t digest[32];
-  hash->Finish(digest, sizeof(digest));
-  output->assign(reinterpret_cast<const char*>(&digest), sizeof(digest));
-}
-
-}  // namespace net