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| 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 #ifndef COMPONENTS_PROXIMITY_AUTH_CRYPTAUTH_ENROLLER_IMPL_H | |
| 6 #define COMPONENTS_PROXIMITY_AUTH_CRYPTAUTH_ENROLLER_IMPL_H | |
| 7 | |
| 8 #include <memory> | |
| 9 | |
| 10 #include "base/callback.h" | |
| 11 #include "base/macros.h" | |
| 12 #include "base/memory/weak_ptr.h" | |
| 13 #include "components/proximity_auth/cryptauth/cryptauth_enroller.h" | |
| 14 #include "components/proximity_auth/cryptauth/proto/cryptauth_api.pb.h" | |
| 15 | |
| 16 namespace proximity_auth { | |
| 17 | |
| 18 class CryptAuthClient; | |
| 19 class CryptAuthClientFactory; | |
| 20 class CryptAuthClientFactoryImpl; | |
| 21 class SecureMessageDelegate; | |
| 22 | |
| 23 // Implementation of CryptAuthEnroller to perform enrollment in two steps: | |
| 24 // 1. SetupEnrollment: | |
| 25 // Obtain a session public key from CryptAuth used to encrypt enrollment | |
| 26 // data. Generate an ephemeral public key and derive a session symmetric | |
| 27 // key. | |
| 28 // 2. FinishEnrollment: | |
| 29 // Encrypt the enrollment data with the session symmetric key, and send the | |
| 30 // payload and device's public key to CryptAuth. | |
| 31 class CryptAuthEnrollerImpl : public CryptAuthEnroller { | |
| 32 public: | |
| 33 // |client_factory| creates CryptAuthClient instances for making API calls. | |
| 34 // |crypto_delegate| is responsible for SecureMessage operations. | |
| 35 CryptAuthEnrollerImpl( | |
| 36 std::unique_ptr<CryptAuthClientFactory> client_factory, | |
| 37 std::unique_ptr<SecureMessageDelegate> secure_message_delegate); | |
| 38 ~CryptAuthEnrollerImpl() override; | |
| 39 | |
| 40 // CryptAuthEnroller: | |
| 41 void Enroll(const std::string& user_public_key, | |
| 42 const std::string& user_private_key, | |
| 43 const cryptauth::GcmDeviceInfo& device_info, | |
| 44 cryptauth::InvocationReason invocation_reason, | |
| 45 const EnrollmentFinishedCallback& callback) override; | |
| 46 | |
| 47 private: | |
| 48 // Callbacks for SetupEnrollment. | |
| 49 void OnSetupEnrollmentSuccess( | |
| 50 const cryptauth::SetupEnrollmentResponse& response); | |
| 51 void OnSetupEnrollmentFailure(const std::string& error); | |
| 52 | |
| 53 // Callbacks for FinishEnrollment. | |
| 54 void OnFinishEnrollmentSuccess( | |
| 55 const cryptauth::FinishEnrollmentResponse& response); | |
| 56 void OnFinishEnrollmentFailure(const std::string& error); | |
| 57 | |
| 58 // Callbacks for SecureMessageDelegate operations. | |
| 59 void OnKeyPairGenerated(const std::string& public_key, | |
| 60 const std::string& private_key); | |
| 61 void OnKeyDerived(const std::string& symmetric_key); | |
| 62 void OnInnerSecureMessageCreated(const std::string& inner_message); | |
| 63 void OnOuterSecureMessageCreated(const std::string& outer_message); | |
| 64 | |
| 65 // Creates the CryptAuthClient instances to make API requests. | |
| 66 std::unique_ptr<CryptAuthClientFactory> client_factory_; | |
| 67 | |
| 68 // Handles SecureMessage operations. | |
| 69 std::unique_ptr<SecureMessageDelegate> secure_message_delegate_; | |
| 70 | |
| 71 // The CryptAuthClient for the latest request. | |
| 72 std::unique_ptr<CryptAuthClient> cryptauth_client_; | |
| 73 | |
| 74 // The ephemeral key-pair generated for a single enrollment. | |
| 75 std::string session_public_key_; | |
| 76 std::string session_private_key_; | |
| 77 | |
| 78 // The user's persistent key-pair identifying the local device. | |
| 79 std::string user_public_key_; | |
| 80 std::string user_private_key_; | |
| 81 | |
| 82 // Contains information of the device to enroll. | |
| 83 cryptauth::GcmDeviceInfo device_info_; | |
| 84 | |
| 85 // The reason telling the server why the enrollment happened. | |
| 86 cryptauth::InvocationReason invocation_reason_; | |
| 87 | |
| 88 // The setup information returned from the SetupEnrollment API call. | |
| 89 cryptauth::SetupEnrollmentInfo setup_info_; | |
| 90 | |
| 91 // Callback invoked when the enrollment is done. | |
| 92 EnrollmentFinishedCallback callback_; | |
| 93 | |
| 94 // The derived ephemeral symmetric key. | |
| 95 std::string symmetric_key_; | |
| 96 | |
| 97 base::WeakPtrFactory<CryptAuthEnrollerImpl> weak_ptr_factory_; | |
| 98 | |
| 99 DISALLOW_COPY_AND_ASSIGN(CryptAuthEnrollerImpl); | |
| 100 }; | |
| 101 | |
| 102 } // namespace proximity_auth | |
| 103 | |
| 104 #endif // COMPONENTS_PROXIMITY_AUTH_CRYPTAUTH_ENROLLER_IMPL_H | |
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