Implement crypto signature verification routines using OpenSSL.

extensions/browser/api/cast_channel/cast_auth_util.cc

 // Copyright 2014 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 "extensions/browser/api/cast_channel/cast_auth_util.h"
 
 #include "base/logging.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/stringprintf.h"
 #include "extensions/browser/api/cast_channel/cast_message_util.h"
 #include "extensions/common/api/cast_channel/cast_channel.pb.h"
 
 namespace extensions {
 namespace core_api {
 namespace cast_channel {
 namespace {
 
 const char* const kParseErrorPrefix = "Failed to parse auth message: ";
 
-}  // namespace
-
-AuthResult::AuthResult() : error_type(ERROR_NONE), nss_error_code(0) {
-}
-
-AuthResult::~AuthResult() {
-}
-
-// static
-AuthResult AuthResult::CreateWithParseError(const std::string& error_message,
-                                            ErrorType error_type) {
-  return AuthResult(kParseErrorPrefix + error_message, error_type, 0);
-}
-
-// static
-AuthResult AuthResult::CreateWithNSSError(const std::string& error_message,
-                                          ErrorType error_type,
-                                          int nss_error_code) {
-  return AuthResult(error_message, error_type, nss_error_code);
-}
-
-AuthResult::AuthResult(const std::string& error_message,
-                       ErrorType error_type,
-                       int nss_error_code)
-    : error_message(error_message),
-      error_type(error_type),
-      nss_error_code(nss_error_code) {
-}
-
+// Extracts an embedded DeviceAuthMessage payload from an auth challenge reply
+// message.
 AuthResult ParseAuthMessage(const CastMessage& challenge_reply,
                             DeviceAuthMessage* auth_message) {
   if (challenge_reply.payload_type() != CastMessage_PayloadType_BINARY) {
     return AuthResult::CreateWithParseError(
         "Wrong payload type in challenge reply",
         AuthResult::ERROR_WRONG_PAYLOAD_TYPE);
   }
   if (!challenge_reply.has_payload_binary()) {
     return AuthResult::CreateWithParseError(
         "Payload type is binary but payload_binary field not set",
@@ skipping 13 matching lines @@
             base::IntToString(auth_message->error().error_type()),
         AuthResult::ERROR_MESSAGE_ERROR);
   }
   if (!auth_message->has_response()) {
     return AuthResult::CreateWithParseError(
         "Auth message has no response field", AuthResult::ERROR_NO_RESPONSE);
   }
   return AuthResult();
 }
 
+}  // namespace
+
+AuthResult::AuthResult() : error_type(ERROR_NONE), nss_error_code(0) {
+}
+
+AuthResult::~AuthResult() {
+}
+
+AuthResult::AuthResult(const AuthResult& rvalue) :
+    error_message(rvalue.error_message),
+    error_type(rvalue.error_type),
+    nss_error_code(rvalue.nss_error_code),
+    openssl_error_stack(rvalue.openssl_error_stack) {}
+
+// static
+AuthResult AuthResult::CreateWithParseError(const std::string& error_message,
+                                            ErrorType error_type) {
+  return AuthResult(kParseErrorPrefix + error_message, error_type, 0,
+                    std::vector<OpenSslErrorEntry>());
+}
+
+// static
+AuthResult AuthResult::CreateWithNSSError(const std::string& error_message,
+                                          ErrorType error_type,
+                                          int nss_error_code) {
+  return AuthResult(error_message, error_type, nss_error_code,
+                    std::vector<OpenSslErrorEntry>());
+}
+
+// static
+AuthResult AuthResult::CreateWithOpenSSLErrors(
+    const std::string& error_message,
+    ErrorType error_type,
+    const std::vector<OpenSslErrorEntry>& openssl_error_stack) {
+  return AuthResult(kParseErrorPrefix + error_message, error_type, 0,
+                    openssl_error_stack);
+}
+
+AuthResult::AuthResult(
+    const std::string& error_message,
+    ErrorType error_type,
+    int nss_error_code,
+    const std::vector<OpenSslErrorEntry>& openssl_error_stack)
+    : error_message(error_message),
+      error_type(error_type),
+      nss_error_code(nss_error_code),
+      openssl_error_stack(openssl_error_stack) {
+}
+
+AuthResult AuthenticateChallengeReply(const CastMessage& challenge_reply,
+                                      const std::string& peer_cert) {
+  if (peer_cert.empty()) {
+    AuthResult result = AuthResult::CreateWithParseError(
+        "Peer cert was empty.", AuthResult::ERROR_PEER_CERT_EMPTY);
+    VLOG(1) << result.error_message;
+    return result;
+  }
+
+  DeviceAuthMessage auth_message;
+  AuthResult result = ParseAuthMessage(challenge_reply, &auth_message);
+  if (!result.success()) {
+    VLOG(1) << result.error_message;
+    return result;
+  }
+
+  const AuthResponse& response = auth_message.response();
+  result = VerifyCredentials(response, peer_cert);
+  if (!result.success()) {
+    VLOG(1) << result.error_message;
+    return result;
+  }
+
+  return AuthResult();
+}
+
 }  // namespace cast_channel
 }  // namespace core_api
 }  // namespace extensions