2 * Copyright (c) 2014 Samsung Electronics Co., Ltd All Rights Reserved
4 * Licensed under the Apache License, Version 2.0 (the License);
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an AS IS BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
16 #ifndef __TIZEN_CORE_KEY_MANAGER_DOC_H__
17 #define __TIZEN_CORE_KEY_MANAGER_DOC_H__
19 * @ingroup CAPI_SECURITY_FRAMEWORK
20 * @defgroup CAPI_KEY_MANAGER_MODULE Key Manager
21 * @brief The key manager provides a secure repository protected by a user’s passwords for keys, certificates, and sensitive data of users and/or their APPs.
22 * Additionally, the key manager provides secure cryptographic operations for non-exportable keys without revealing key values to clients.
24 * @section CAPI_KEY_MANAGER_MODULE_OVERVIEW Overview
26 * <tr><th>API</th><th>Description</th></tr>
28 * <td> @ref CAPI_KEY_MANAGER_CLIENT_MODULE</td>
29 * <td> Provides APIs for accessing the secure repository and additional secure cryptographic operations.</td>
32 * <td> @ref CAPI_KEY_MANAGER_TYPES_MODULE</td>
33 * <td> Defines data types used in these APIs and provides utility methods handling them.</td>
37 * It provides a secure repository for keys, certificates, and sensitive data of users and/or their APPs which are protected by a user’s passwords.
38 * Additionally, it provides secure cryptographic operations for non-exportable keys without revealing key values to clients.
40 * @image html capi_key_manager_overview_diagram.png
42 * The key manager provides 2 types of API.
43 * - secure repository APIs : These APIs provides storing, retrieving, and removing functions for keys, certificates, and data.
44 * - secure crypto APIs : These APIs provides additional cryptographic operations (create asymmetric key pair, sign/verify signature, verify certificate).
47 * A client can specify simple access rules when storing a data in Key Manager.
48 * - Exportable/Non-Exportable:
49 * Only for data tagged as exportable, Key Manager returns the raw value of the data.
50 * If data is tagged as non-exportable, Key Manager does not return its raw value.
51 * In that case, Key Manager provides secure cryptographic operations for non-exportable keys without revealing key values to clients.
53 * All data in Key Manager is protected by a user’s password.
54 * Besides, a client can encrypt its data using its own password additionally.
55 * If a client provides a password when storing a data, the data will be encrypted with the password.
56 * This password should be provided when get the data from Key Manager.
58 * User Login/Logout and Data Protection
59 * - When a user logs in, logs out or changes his/her password, Key Manager should know about it.
60 * Privileged APPs such as LockScreen APP or Setting APP can notify the key manager using these control APIs.
61 * - When a user logs in, the key manager decrypts the user's DKEK (with which a user's data file is encrypted) with a user password.
62 * So during the login period, any client can access its data which is protected by a user's password.
63 * "user key" in API means DKEK.
64 * - When a user logs out, the key manager removes the user's DKEK from memory.
65 * Therefore, clients cannot access any data.
66 * - When a user changes his/her password, the key manager re-encrypts the user's DKEK with the new password.
69 * - By default, only the owner of a data can access to the data.
70 * - If the owner grants the access to other applications, those applications can read or delete the data from key-manager DB.
71 * - When an application is deleted, the data and access control information granted by the application are also removed.
74 * - The format of alias is package_id::name.
75 * - If package_id is not provided by a client, the key-manager will add the package_id of the client to the name internally.
76 * - The client can specify only its own pacakge id in the alias when storing a key, certificate, or data.
77 * - A client should specify the pacakge id of the owner in the alias to retrieve a a key, certificate, or data shared by other applications.
78 * - Aliases are returned as the format of package_id::name from the key-manager.
82 #endif /* __TIZEN_CORE_KEY_MANAGER_DOC_H__ */