1 // Copyright (c) 2012 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.
5 #ifndef CHROMEOS_ATTESTATION_ATTESTATION_FLOW_H_
6 #define CHROMEOS_ATTESTATION_ATTESTATION_FLOW_H_
10 #include "base/basictypes.h"
11 #include "base/callback_forward.h"
12 #include "base/memory/scoped_ptr.h"
13 #include "base/memory/weak_ptr.h"
14 #include "chromeos/attestation/attestation_constants.h"
15 #include "chromeos/chromeos_export.h"
16 #include "chromeos/dbus/dbus_method_call_status.h"
17 #include "third_party/cros_system_api/dbus/service_constants.h"
19 namespace cryptohome {
21 class AsyncMethodCaller;
23 } // namespace cryptohome
27 class CryptohomeClient;
29 namespace attestation {
31 // Interface for access to the Privacy CA server.
32 class CHROMEOS_EXPORT ServerProxy {
34 typedef base::Callback<void(bool success,
35 const std::string& data)> DataCallback;
36 virtual ~ServerProxy() {}
37 virtual void SendEnrollRequest(const std::string& request,
38 const DataCallback& on_response) = 0;
39 virtual void SendCertificateRequest(const std::string& request,
40 const DataCallback& on_response) = 0;
43 // Implements the message flow for Chrome OS attestation tasks. Generally this
44 // consists of coordinating messages between the Chrome OS attestation service
45 // and the Chrome OS Privacy CA server. Sample usage:
46 // AttestationFlow flow(AsyncMethodCaller::GetInstance(),
47 // DBusThreadManager::Get().GetCryptohomeClient(),
48 // my_server_proxy.Pass());
49 // AttestationFlow::CertificateCallback callback = base::Bind(&MyCallback);
50 // flow.GetCertificate(ENTERPRISE_USER_CERTIFICATE, false, callback);
51 class CHROMEOS_EXPORT AttestationFlow {
53 typedef base::Callback<void(bool success,
54 const std::string& pem_certificate_chain)>
57 AttestationFlow(cryptohome::AsyncMethodCaller* async_caller,
58 CryptohomeClient* cryptohome_client,
59 scoped_ptr<ServerProxy> server_proxy);
60 virtual ~AttestationFlow();
62 // Gets an attestation certificate for a hardware-protected key. If a key for
63 // the given profile does not exist, it will be generated and a certificate
64 // request will be made to the Chrome OS Privacy CA to issue a certificate for
65 // the key. If the key already exists and |force_new_key| is false, the
66 // existing certificate is returned.
69 // certificate_profile - Specifies what kind of certificate should be
70 // requested from the CA.
71 // user_id - Identifies the currently active user. For normal GAIA users
72 // this is a canonical email address. This is ignored when using
73 // the enterprise machine cert profile.
74 // request_origin - For content protection profiles, certificate requests
75 // are origin-specific. This string must uniquely identify
76 // the origin of the request.
77 // force_new_key - If set to true, a new key will be generated even if a key
78 // already exists for the profile. The new key will replace
79 // the existing key on success.
80 // callback - A callback which will be called when the operation completes.
81 // On success |result| will be true and |data| will contain the
82 // PCA-issued certificate chain in PEM format.
83 virtual void GetCertificate(AttestationCertificateProfile certificate_profile,
84 const std::string& user_id,
85 const std::string& request_origin,
87 const CertificateCallback& callback);
90 // Asynchronously initiates the attestation enrollment flow.
93 // on_failure - Called if any failure occurs.
94 // next_task - Called on successful enrollment.
95 void StartEnroll(const base::Closure& on_failure,
96 const base::Closure& next_task);
98 // Called when the attestation daemon has finished creating an enrollment
99 // request for the Privacy CA. The request is asynchronously forwarded as-is
103 // on_failure - Called if any failure occurs.
104 // next_task - Called on successful enrollment.
105 // success - The status of request creation.
106 // data - The request data for the Privacy CA.
107 void SendEnrollRequestToPCA(const base::Closure& on_failure,
108 const base::Closure& next_task,
110 const std::string& data);
112 // Called when the Privacy CA responds to an enrollment request. The response
113 // is asynchronously forwarded as-is to the attestation daemon in order to
114 // complete the enrollment operation.
117 // on_failure - Called if any failure occurs.
118 // next_task - Called on successful enrollment.
119 // success - The status of the Privacy CA operation.
120 // data - The response data from the Privacy CA.
121 void SendEnrollResponseToDaemon(const base::Closure& on_failure,
122 const base::Closure& next_task,
124 const std::string& data);
126 // Called when the attestation daemon completes an enrollment operation. If
127 // the operation was successful, the next_task callback is called.
130 // on_failure - Called if any failure occurs.
131 // next_task - Called on successful enrollment.
132 // success - The status of the enrollment operation.
133 // not_used - An artifact of the cryptohome D-Bus interface; ignored.
134 void OnEnrollComplete(const base::Closure& on_failure,
135 const base::Closure& next_task,
137 cryptohome::MountError not_used);
139 // Asynchronously initiates the certificate request flow. Attestation
140 // enrollment must complete successfully before this operation can succeed.
143 // certificate_profile - Specifies what kind of certificate should be
144 // requested from the CA.
145 // user_id - Identifies the active user.
146 // request_origin - An identifier for the origin of this request.
147 // generate_new_key - If set to true a new key is generated.
148 // callback - Called when the operation completes.
149 void StartCertificateRequest(
150 const AttestationCertificateProfile certificate_profile,
151 const std::string& user_id,
152 const std::string& request_origin,
153 bool generate_new_key,
154 const CertificateCallback& callback);
156 // Called when the attestation daemon has finished creating a certificate
157 // request for the Privacy CA. The request is asynchronously forwarded as-is
161 // key_type - The type of the key for which a certificate is requested.
162 // user_id - Identifies the active user.
163 // key_name - The name of the key for which a certificate is requested.
164 // callback - Called when the operation completes.
165 // success - The status of request creation.
166 // data - The request data for the Privacy CA.
167 void SendCertificateRequestToPCA(AttestationKeyType key_type,
168 const std::string& user_id,
169 const std::string& key_name,
170 const CertificateCallback& callback,
172 const std::string& data);
174 // Called when the Privacy CA responds to a certificate request. The response
175 // is asynchronously forwarded as-is to the attestation daemon in order to
176 // complete the operation.
179 // key_type - The type of the key for which a certificate is requested.
180 // user_id - Identifies the active user.
181 // key_name - The name of the key for which a certificate is requested.
182 // callback - Called when the operation completes.
183 // success - The status of the Privacy CA operation.
184 // data - The response data from the Privacy CA.
185 void SendCertificateResponseToDaemon(AttestationKeyType key_type,
186 const std::string& user_id,
187 const std::string& key_name,
188 const CertificateCallback& callback,
190 const std::string& data);
192 // Gets an existing certificate from the attestation daemon.
195 // key_type - The type of the key for which a certificate is requested.
196 // user_id - Identifies the active user.
197 // key_name - The name of the key for which a certificate is requested.
198 // callback - Called when the operation completes.
199 void GetExistingCertificate(AttestationKeyType key_type,
200 const std::string& user_id,
201 const std::string& key_name,
202 const CertificateCallback& callback);
204 cryptohome::AsyncMethodCaller* async_caller_;
205 CryptohomeClient* cryptohome_client_;
206 scoped_ptr<ServerProxy> server_proxy_;
208 base::WeakPtrFactory<AttestationFlow> weak_factory_;
210 DISALLOW_COPY_AND_ASSIGN(AttestationFlow);
213 } // namespace attestation
214 } // namespace chromeos
216 #endif // CHROMEOS_ATTESTATION_ATTESTATION_FLOW_H_