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SecureStore.h
1 /*
2  * Copyright (c) 2018 ARM Limited. All rights reserved.
3  * SPDX-License-Identifier: Apache-2.0
4  * Licensed under the Apache License, Version 2.0 (the License); you may
5  * not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an AS IS BASIS, WITHOUT
12  * 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.
15  */
16 
17 #ifndef MBED_SECURESTORE_H
18 #define MBED_SECURESTORE_H
19 
20 #if !defined(MBEDTLS_CONFIG_FILE)
21 #include "mbedtls/config.h"
22 #else
23 #include MBEDTLS_CONFIG_FILE
24 #endif
25 
26 #include "DeviceKey.h"
27 
28 #define SECURESTORE_ENABLED 1
29 
30 // Whole class is not supported if entropy, device key or required mbed TLS features are not enabled
31 #if !defined(MBEDTLS_ENTROPY_C) || !defined(MBEDTLS_CIPHER_MODE_CTR) || !defined(MBEDTLS_CMAC_C) || !DEVICEKEY_ENABLED
32 #undef SECURESTORE_ENABLED
33 #define SECURESTORE_ENABLED 0
34 #endif
35 
36 #if SECURESTORE_ENABLED || defined(DOXYGEN_ONLY)
37 
38 #include <stdint.h>
39 #include <stdio.h>
40 #include "KVStore.h"
41 #include "PlatformMutex.h"
42 
43 namespace mbed {
44 
45 /** TDBStore class
46  *
47  * Lightweight Key Value storage over a block device
48  */
49 
50 class SecureStore : public KVStore {
51 public:
52 
53  /**
54  * @brief Class constructor
55  *
56  * @param[in] underlying_kv KVStore that will hold the data.
57  * @param[in] rbp_kv Additional KVStore used for rollback protection.
58  *
59  * @returns none
60  */
61  SecureStore(KVStore *underlying_kv, KVStore *rbp_kv = 0);
62 
63  /**
64  * @brief Class destructor
65  *
66  * @returns none
67  */
68  virtual ~SecureStore();
69 
70  /**
71  * @brief Initialize SecureStore class. It will also initialize
72  * the underlying KVStore and the rollback protection KVStore.
73  *
74  * @returns MBED_SUCCESS Success.
75  * or any other error from underlying KVStore instances.
76  */
77  virtual int init();
78 
79  /**
80  * @brief Deinitialize SecureStore class, free handles and memory allocations.
81  *
82  * @returns MBED_SUCCESS Success.
83  * or any other error from underlying KVStore instances.
84  */
85  virtual int deinit();
86 
87 
88  /**
89  * @brief Reset KVStore contents (clear all keys)
90  * Warning: This function is not thread safe.
91  *
92  * @returns MBED_SUCCESS Success.
93  * MBED_ERROR_NOT_READY Not initialized.
94  * or any other error from underlying KVStore instances.
95  */
96  virtual int reset();
97 
98  /**
99  * @brief Set one KVStore item, given key and value.
100  *
101  * @param[in] key Key - must not include '*' '/' '?' ':' ';' '\' '"' '|' ' ' '<' '>' '\'.
102  * @param[in] buffer Value data buffer.
103  * @param[in] size Value data size.
104  * @param[in] create_flags Flag mask - WRITE_ONCE_FLAG|REQUIRE_CONFIDENTIALITY_FLAG|
105  * REQUIRE_INTEGRITY_FLAG|REQUIRE_REPLAY_PROTECTION_FLAG
106  *
107  * @returns MBED_SUCCESS Success.
108  * MBED_ERROR_NOT_READY Not initialized.
109  * MBED_ERROR_READ_FAILED Unable to read from media.
110  * MBED_ERROR_INVALID_ARGUMENT Invalid argument given in function arguments.
111  * MBED_ERROR_INVALID_SIZE Invalid size given in function arguments.
112  * MBED_ERROR_WRITE_PROTECTED Already stored with "write once" flag.
113  * MBED_ERROR_FAILED_OPERATION Internal error.
114  * or any other error from underlying KVStore instances.
115  */
116  virtual int set(const char *key, const void *buffer, size_t size, uint32_t create_flags);
117 
118  /**
119  * @brief Get one KVStore item, given key.
120  *
121  * @param[in] key Key - must not include '*' '/' '?' ':' ';' '\' '"' '|' ' ' '<' '>' '\'.
122  * @param[in] buffer Value data buffer.
123  * @param[in] buffer_size Value data buffer size.
124  * @param[out] actual_size Actual read size.
125  * @param[in] offset Offset to read from in data.
126  *
127  * @returns MBED_SUCCESS Success.
128  * MBED_ERROR_NOT_READY Not initialized.
129  * MBED_ERROR_READ_FAILED Unable to read from media.
130  * MBED_ERROR_INVALID_ARGUMENT Invalid argument given in function arguments.
131  * MBED_ERROR_INVALID_SIZE Invalid size given in function arguments.
132  * MBED_ERROR_FAILED_OPERATION Internal error.
133  * MBED_ERROR_ITEM_NOT_FOUND No such key.
134  * MBED_ERROR_AUTHENTICATION_FAILED Data authentication failed.
135  * MBED_ERROR_AUTHENTICATION_RBP_FAILED
136  * Rollback protection data authentication failed.
137  * or any other error from underlying KVStore instances.
138  */
139  virtual int get(const char *key, void *buffer, size_t buffer_size, size_t *actual_size = NULL,
140  size_t offset = 0);
141 
142  /**
143  * @brief Get information of a given key.
144  *
145  * @param[in] key Key - must not include '*' '/' '?' ':' ';' '\' '"' '|' ' ' '<' '>' '\'.
146  * @param[out] info Returned information structure containing size and flags.
147  *
148  * @returns MBED_SUCCESS Success.
149  * MBED_ERROR_NOT_READY Not initialized.
150  * MBED_ERROR_READ_FAILED Unable to read from media.
151  * MBED_ERROR_INVALID_ARGUMENT Invalid argument given in function arguments.
152  * MBED_ERROR_FAILED_OPERATION Internal error.
153  * MBED_ERROR_ITEM_NOT_FOUND No such key.
154  * MBED_ERROR_AUTHENTICATION_FAILED Data authentication failed.
155  * MBED_ERROR_AUTHENTICATION_RBP_FAILED
156  * Rollback protection data authentication failed.
157  * or any other error from underlying KVStore instances.
158  */
159  virtual int get_info(const char *key, info_t *info);
160 
161  /**
162  * @brief Remove a KVStore item, given key.
163  *
164  * @param[in] key Key - must not include '*' '/' '?' ':' ';' '\' '"' '|' ' ' '<' '>' '\'.
165  *
166  * @returns MBED_SUCCESS Success.
167  * MBED_ERROR_NOT_READY Not initialized.
168  * MBED_ERROR_READ_FAILED Unable to read from media.
169  * MBED_ERROR_INVALID_ARGUMENT Invalid argument given in function arguments.
170  * MBED_ERROR_WRITE_PROTECTED Already stored with "write once" flag.
171  * MBED_ERROR_FAILED_OPERATION Internal error.
172  * or any other error from underlying KVStore instances.
173  */
174  virtual int remove(const char *key);
175 
176 
177  /**
178  * @brief Start an incremental KVStore set sequence. This operation is blocking other operations.
179  * Any get/set/remove/iterator operation will be blocked until set_finalize is called.
180  *
181  * @param[out] handle Returned incremental set handle.
182  * @param[in] key Key - must not include '*' '/' '?' ':' ';' '\' '"' '|' ' ' '<' '>' '\'.
183  * @param[in] final_data_size Final value data size.
184  * @param[in] create_flags Flag mask - WRITE_ONCE_FLAG|REQUIRE_CONFIDENTIALITY_FLAG|
185  * REQUIRE_INTEGRITY_FLAG|REQUIRE_REPLAY_PROTECTION_FLAG
186  *
187  * @returns MBED_SUCCESS Success.
188  * MBED_ERROR_NOT_READY Not initialized.
189  * MBED_ERROR_READ_FAILED Unable to read from media.
190  * MBED_ERROR_INVALID_ARGUMENT Invalid argument given in function arguments.
191  * MBED_ERROR_INVALID_SIZE Invalid size given in function arguments.
192  * MBED_ERROR_WRITE_PROTECTED Already stored with "write once" flag.
193  * MBED_ERROR_FAILED_OPERATION Internal error.
194  * or any other error from underlying KVStore instances.
195  */
196  virtual int set_start(set_handle_t *handle, const char *key, size_t final_data_size, uint32_t create_flags);
197 
198  /**
199  * @brief Add data to incremental KVStore set sequence. This operation is blocking other operations.
200  * Any get/set/remove operation will be blocked until set_finalize is called.
201  *
202  * @param[in] handle Incremental set handle.
203  * @param[in] value_data value data to add.
204  * @param[in] data_size value data size.
205  *
206  * @returns MBED_SUCCESS Success.
207  * MBED_ERROR_NOT_READY Not initialized.
208  * MBED_ERROR_INVALID_ARGUMENT Invalid argument given in function arguments.
209  * MBED_ERROR_INVALID_SIZE Invalid size given in function arguments.
210  * MBED_ERROR_FAILED_OPERATION Internal error.
211  * or any other error from underlying KVStore instances.
212  */
213  virtual int set_add_data(set_handle_t handle, const void *value_data, size_t data_size);
214 
215  /**
216  * @brief Finalize an incremental KVStore set sequence.
217  *
218  * @param[in] handle Incremental set handle.
219  *
220  * @returns MBED_SUCCESS Success.
221  * MBED_ERROR_NOT_READY Not initialized.
222  * MBED_ERROR_INVALID_ARGUMENT Invalid argument given in function arguments.
223  * MBED_ERROR_INVALID_SIZE Invalid size given in function arguments.
224  * MBED_ERROR_FAILED_OPERATION Internal error.
225  * or any other error from underlying KVStore instances.
226  */
227  virtual int set_finalize(set_handle_t handle);
228 
229  /**
230  * @brief Start an iteration over KVStore keys.
231  * There are no issue with any other operation while iterator is open.
232  *
233  * @param[out] it Returned iterator handle.
234  * @param[in] prefix Key prefix (null for all keys).
235  *
236  * @returns MBED_SUCCESS Success.
237  * MBED_ERROR_NOT_READY Not initialized.
238  * MBED_ERROR_INVALID_ARGUMENT Invalid argument given in function arguments.
239  * or any other error from underlying KVStore instances.
240  */
241  virtual int iterator_open(iterator_t *it, const char *prefix = NULL);
242 
243  /**
244  * @brief Get next key in iteration.
245  * There are no issue with any other operation while iterator is open.
246  *
247  * @param[in] it Iterator handle.
248  * @param[in] key Buffer for returned key.
249  * @param[in] key_size Key buffer size.
250  *
251  * @returns MBED_SUCCESS Success.
252  * MBED_ERROR_NOT_READY Not initialized.
253  * MBED_ERROR_INVALID_ARGUMENT Invalid argument given in function arguments.
254  * or any other error from underlying KVStore instances.
255  */
256  virtual int iterator_next(iterator_t it, char *key, size_t key_size);
257 
258  /**
259  * @brief Close iteration.
260  *
261  * @returns MBED_SUCCESS Success.
262  * MBED_ERROR_NOT_READY Not initialized.
263  * MBED_ERROR_INVALID_ARGUMENT Invalid argument given in function arguments.
264  * or any other error from underlying KVStore instances.
265  *
266  * @returns 0 on success or a negative error code on failure
267  */
268  virtual int iterator_close(iterator_t it);
269 
270 #if !defined(DOXYGEN_ONLY)
271 private:
272 
273  PlatformMutex _mutex;
274  bool _is_initialized;
275  KVStore *_underlying_kv, *_rbp_kv;
276  void *_entropy;
277  void *_inc_set_handle;
278  uint8_t *_scratch_buf;
279 
280  /**
281  * @brief Actual get function, serving get and get_info APIs.
282  *
283  * @param[in] key Key - must not include '*' '/' '?' ':' ';' '\' '"' '|' ' ' '<' '>' '\'.
284  * @param[in] buffer Value data buffer.
285  * @param[in] buffer_size Value data buffer size.
286  * @param[out] actual_size Actual read size.
287  * @param[in] offset Offset to read from in data.
288  * @param[out] info Returned information structure.
289  *
290  * @returns 0 on success or a negative error code on failure
291  */
292  int do_get(const char *key, void *buffer, size_t buffer_size, size_t *actual_size = NULL,
293  size_t offset = 0, info_t *info = 0);
294 #endif
295 };
296 /** @}*/
297 
298 } // namespace mbed
299 
300 #endif
301 #endif
mbed::SecureStore::reset
virtual int reset()
Reset KVStore contents (clear all keys) Warning: This function is not thread safe.
mbed::SecureStore::init
virtual int init()
Initialize SecureStore class.
mbed::KVStore::info
Holds key information.
Definition: KVStore.h:48
mbed::SecureStore::deinit
virtual int deinit()
Deinitialize SecureStore class, free handles and memory allocations.
mbed::SecureStore::~SecureStore
virtual ~SecureStore()
Class destructor.
mbed::SecureStore::iterator_open
virtual int iterator_open(iterator_t *it, const char *prefix=NULL)
Start an iteration over KVStore keys.
mbed::SecureStore::get_info
virtual int get_info(const char *key, info_t *info)
Get information of a given key.
PlatformMutex
The PlatformMutex class is used to synchronize the execution of threads.
Definition: PlatformMutex.h:47
mbed::SecureStore::set_start
virtual int set_start(set_handle_t *handle, const char *key, size_t final_data_size, uint32_t create_flags)
Start an incremental KVStore set sequence.
mbed::SecureStore::iterator_close
virtual int iterator_close(iterator_t it)
Close iteration.
mbed::SecureStore::set_finalize
virtual int set_finalize(set_handle_t handle)
Finalize an incremental KVStore set sequence.
mbed::KVStore
KVStore class.
Definition: KVStore.h:30
mbed::SecureStore::iterator_next
virtual int iterator_next(iterator_t it, char *key, size_t key_size)
Get next key in iteration.
mbed::SecureStore::set_add_data
virtual int set_add_data(set_handle_t handle, const void *value_data, size_t data_size)
Add data to incremental KVStore set sequence.
mbed::SecureStore
TDBStore class.
Definition: SecureStore.h:50
mbed::SecureStore::SecureStore
SecureStore(KVStore *underlying_kv, KVStore *rbp_kv=0)
Class constructor.
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