Moved //components/proximity_auth/cryptauth to //components/cryptauth.

components/proximity_auth/cryptauth/secure_message_delegate.h

-// Copyright 2015 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.
-
-#ifndef COMPONENTS_PROXIMITY_AUTH_SECURE_MESSAGE_DELEGATE_H
-#define COMPONENTS_PROXIMITY_AUTH_SECURE_MESSAGE_DELEGATE_H
-
-#include <string>
-
-#include "base/callback_forward.h"
-#include "components/proximity_auth/cryptauth/proto/securemessage.pb.h"
-
-namespace proximity_auth {
-
-// Interface of delegate responsible for cryptographic operations based on the
-// secure message library. This interface is asynchronous as the current
-// implementation on ChromeOS communicates with a daemon process over IPC.
-class SecureMessageDelegate {
- public:
-  // Fields specifying how to create a SecureMessage.
-  struct CreateOptions {
-    CreateOptions();
-    CreateOptions(const CreateOptions& other);
-    ~CreateOptions();
-
-    // The scheme used to encrypt the message.
-    securemessage::EncScheme encryption_scheme;
-    // The scheme used to sign the message.
-    securemessage::SigScheme signature_scheme;
-    // Additional data that is used as part of the signature computation but not
-    // included in the message contents.
-    std::string associated_data;
-    // Plain-text data included in the message header.
-    std::string public_metadata;
-    // Identifies the key to use for verifying the message signature.
-    std::string verification_key_id;
-    // Identifies the key to use for decrypting the message.
-    std::string decryption_key_id;
-  };
-
-  // Fields specifying how to unwrap a SecureMessage.
-  struct UnwrapOptions {
-    UnwrapOptions();
-    ~UnwrapOptions();
-
-    // The scheme used to decrypt the message.
-    securemessage::EncScheme encryption_scheme;
-    // The scheme used to verify the message signature.
-    securemessage::SigScheme signature_scheme;
-    // Additional data that is used as part of the signature computation but not
-    // included in the message contents.
-    std::string associated_data;
-  };
-
-  SecureMessageDelegate();
-  virtual ~SecureMessageDelegate();
-
-  // Generates a new asymmetric key pair.
-  typedef base::Callback<void(const std::string& public_key,
-                              const std::string& private_key)>
-      GenerateKeyPairCallback;
-  virtual void GenerateKeyPair(const GenerateKeyPairCallback& callback) = 0;
-
-  // Derives a symmetric key from our private key and the remote device's
-  // public key.
-  typedef base::Callback<void(const std::string& derived_key)>
-      DeriveKeyCallback;
-  virtual void DeriveKey(const std::string& private_key,
-                         const std::string& public_key,
-                         const DeriveKeyCallback& callback) = 0;
-
-  // Creates a new secure message with a |payload| given the |key| and
-  // |create_options| specifying the cryptographic details.
-  // |callback| will be invoked with the serialized SecureMessage upon success
-  // or the empty string upon failure.
-  typedef base::Callback<void(const std::string& secure_message)>
-      CreateSecureMessageCallback;
-  virtual void CreateSecureMessage(
-      const std::string& payload,
-      const std::string& key,
-      const CreateOptions& create_options,
-      const CreateSecureMessageCallback& callback) = 0;
-
-  // Unwraps |secure_message| given the |key| and |unwrap_options| specifying
-  // the cryptographic details.
-  // |callback| will be invoked with true for the |verified| argument if the
-  // message was verified and decrypted successfully. The |payload| and
-  // |header| fields will be non-empty if the message was verified successfully.
-  typedef base::Callback<void(bool verified,
-                              const std::string& payload,
-                              const securemessage::Header& header)>
-      UnwrapSecureMessageCallback;
-  virtual void UnwrapSecureMessage(
-      const std::string& serialized_message,
-      const std::string& key,
-      const UnwrapOptions& unwrap_options,
-      const UnwrapSecureMessageCallback& callback) = 0;
-};
-
-}  // namespace proximity_auth
-
-#endif  // COMPONENTS_PROXIMITY_AUTH_SECURE_MESSAGE_DELEGATE_H