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update.h
1 /*
2  * Copyright (c) 2021, Arm Limited. All rights reserved.
3  *
4  * SPDX-License-Identifier: BSD-3-Clause
5  *
6  */
7 
8 #ifndef PSA_UPDATE_H
9 #define PSA_UPDATE_H
10 
11 #include <stddef.h>
12 #include <stdint.h>
13 
14 #include "psa/error.h"
15 #include "tfm_fwu_defs.h"
16 
17 #ifdef __cplusplus
18 extern "C" {
19 #endif
20 
21 #define PSA_FWU_MAX_BLOCK_SIZE 1024
22 #define TFM_FWU_INVALID_IMAGE_ID 0
23 
24 /* The maximum size of an image digest in bytes. This is dependent
25  * on the hash algorithm used.
26  */
27 #define PSA_FWU_MAX_DIGEST_SIZE 32
28 #define TFM_IMAGE_INFO_INVALID_DIGEST 0xFF
29 
30 /* The image ID macros. */
31 #define FWU_IMAGE_ID_SLOT_POSITION 0U
32 
33 /* The area where the image is running. */
34 #define FWU_IMAGE_ID_SLOT_ACTIVE 0x01U
35 
36 /* The area to stage the image. */
37 #define FWU_IMAGE_ID_SLOT_STAGE 0x02U
38 #define FWU_IMAGE_ID_SLOT_MASK 0x00FF
39 
40 #define FWU_IMAGE_ID_TYPE_POSITION 8U
41 #define FWU_IMAGE_ID_SPECIFIC_ID_POSITION 16U
42 
43 #define FWU_CALCULATE_IMAGE_ID(slot, type, specific_id) \
44  ((slot & FWU_IMAGE_ID_SLOT_MASK) | \
45  (type << FWU_IMAGE_ID_TYPE_POSITION) | \
46  (specific_id << FWU_IMAGE_ID_SPECIFIC_ID_POSITION))
47 #define FWU_IMAGE_ID_GET_TYPE(image_id) (image_id >> FWU_IMAGE_ID_TYPE_POSITION)
48 #define FWU_IMAGE_ID_GET_SLOT(image_id) (image_id & FWU_IMAGE_ID_SLOT_MASK)
49 
50 /* Image state macros. */
51 #define PSA_IMAGE_UNDEFINED 0
52 #define PSA_IMAGE_CANDIDATE 1
53 #define PSA_IMAGE_INSTALLED 2
54 #define PSA_IMAGE_REJECTED 3
55 #define PSA_IMAGE_PENDING_INSTALL 4
56 #define PSA_IMAGE_REBOOT_NEEDED 5
57 
58 /*
59  * image_id[7:0]: slot.
60  * image_id[15:8]: image type.
61  * image_id[31:16]: specific image ID.
62  */
63 typedef uint32_t psa_image_id_t;
64 
65 typedef struct tfm_image_version_s {
66  uint8_t iv_major;
67  uint8_t iv_minor;
68  uint16_t iv_revision;
69  uint32_t iv_build_num;
70 } psa_image_version_t;
71 
72 typedef struct tfm_image_info_s {
73  psa_image_version_t version;
74  uint8_t state;
75  uint8_t digest[PSA_FWU_MAX_DIGEST_SIZE];
76 } psa_image_info_t;
77 
78 typedef struct psa_hash_s {
79  uint8_t value[PSA_FWU_MAX_DIGEST_SIZE];
80 } psa_hash_t;
81 
82 /**
83  * \brief Writes an image to its staging area.
84  *
85  * Writes the image data 'block' with length 'block_size' to its staging area.
86  * If the image size is less than or equal to PSA_FWU_MAX_BLOCK_SIZE, the
87  * caller can send the entire image in one call.
88  * If the image size is greater than PSA_FWU_MAX_BLOCK_SIZE, the caller must
89  * send parts of the image by calling this API multiple times with different
90  * data blocks.
91  *
92  * \param[in] image_id The identifier of the image
93  * \param[in] block_offset The offset of the block being passed into block,
94  * in bytes
95  * \param[in] block A buffer containing a block of image data. This
96  * might be a complete image or a subset.
97  * \param[in] block_size Size of block. The size must not be greater than
98  * PSA_FWU_MAX_BLOCK_SIZE.
99  *
100  * \return A status indicating the success/failure of the operation
101  *
102  * \retval PSA_SUCCESS The data in block has been
103  * successfully stored.
104  * \retval PSA_ERROR_INVALID_ARGUMENT One of the following error
105  * conditions occurred:
106  * The parameter size is greater than
107  * PSA_FWU_MAX_BLOCK_SIZE;
108  * The parameter size is 0;
109  * The combination of offset and size
110  * is out of bounds.
111  *
112  * \retval PSA_ERROR_INSUFFICIENT_MEMORY There is not enough memory to
113  * process the update
114  * \retval PSA_ERROR_INSUFFICIENT_STORAGE There is not enough storage to
115  * process the update
116  * \retval PSA_ERROR_GENERAL_ERROR A fatal error occurred
117  * \retval PSA_ERROR_CURRENTLY_INSTALLING The image is currently locked for
118  * writing.
119  */
120 psa_status_t psa_fwu_write(psa_image_id_t image_id,
121  size_t block_offset,
122  const void *block,
123  size_t block_size);
124 
125 
126 /**
127  * \brief Starts the installation of an image.
128  *
129  * The authenticity and integrity of the image is checked during installation.
130  * If a reboot is required to complete installation then the implementation
131  * can choose to defer the authenticity checks to that point.
132  *
133  * \param[in] image_id The identifier of the image to install
134  * \param[out] dependency_uuid If PSA_ERROR_DEPENDENCY_NEEDED is returned,
135  * this parameter is filled with dependency
136  * information
137  * \param[out] dependency_version If PSA_ERROR_DEPENDENCY_NEEDED is returned,
138  * this parameter is filled with the minimum
139  * required version for the dependency
140  *
141  * \return A status indicating the success/failure of the operation
142  *
143  * \retval PSA_SUCCESS The image was successfully
144  * installed. The platform does not
145  * require a reboot.
146  * \retval PSA_SUCCESS_REBOOT A system reboot is needed to finish
147  * installation.
148  * \retval PSA_ERROR_INVALID_ARGUMENT Bad input parameter
149  * \retval PSA_ERROR_INVALID_SIGNATURE The signature is incorrect
150  * \retval PSA_ERROR_GENERAL_ERROR A fatal error occurred
151  * \retval PSA_ERROR_DEPENDENCY_NEEDED A different image requires
152  * installation first
153  * \retval PSA_ERROR_STORAGE_FAILURE Some persistent storage could not be
154  * read or written by the
155  * implementation
156  */
157 psa_status_t psa_fwu_install(psa_image_id_t image_id,
158  psa_image_id_t *dependency_uuid,
159  psa_image_version_t *dependency_version);
160 
161 /**
162  * \brief Aborts an ongoing installation and erases the staging area of the
163  * image.
164  *
165  * \param[in] image_id The identifier of the image to abort installation
166  *
167  * \return A status indicating the success/failure of the operation
168  *
169  * \retval PSA_SUCCESS Installation of the provided image_id
170  * has been aborted
171  * \retval PSA_ERROR_INVALID_ARGUMENT No image with the provided image_id
172  * is currently being installed
173  * \retval PSA_ERROR_NOT_PERMITTED The caller is not authorized to
174  * abort an installation
175  */
176 psa_status_t psa_fwu_abort(psa_image_id_t image_id);
177 
178 /**
179  * \brief Returns information for an image of a particular image_id.
180  *
181  * \param[in] image_id The image_id of the image to query
182  *
183  * \param[out] info Output parameter for image information
184  * related to the image_id
185  *
186  * \return A status indicating the success/failure of the operation
187  *
188  * \retval PSA_SUCCESS Image information has been returned
189  * \retval PSA_ERROR_NOT_PERMITTED The caller is not authorized to
190  * access platform version information
191  */
192 psa_status_t psa_fwu_query(psa_image_id_t image_id,
193  psa_image_info_t *info);
194 
195 /**
196  * \brief Requests the platform to reboot. On success, the platform initiates
197  * a reboot, and might not return to the caller.
198  *
199  * \return A status indicating the success/failure of the operation
200  *
201  * \retval PSA_SUCCESS The platform will reboot soon
202  * \retval PSA_ERROR_NOT_PERMITTED The caller is not authorized to
203  * reboot the platform
204  */
205 psa_status_t psa_fwu_request_reboot(void);
206 
207 /**
208  * \brief Indicates to the implementation that the upgrade was successful.
209  *
210  * \return A status indicating the success/failure of the operation
211  *
212  * \retval PSA_SUCCESS The image and its dependencies have
213  * transitioned into a PSA_IMAGE_INSTALLED
214  * state
215  * \retval PSA_ERROR_NOT_SUPPORTED The implementation does not support a
216  * PSA_IMAGE_PENDING_INSTALL state
217  * \retval PSA_ERROR_NOT_PERMITTED The caller is not permitted to make
218  * this call
219  */
220 psa_status_t psa_fwu_accept(void);
221 
222 /**
223  * \brief Stores a manifest object and associates it with a particular image ID.
224  *
225  * \param[in] image_id The identifier of the image
226  *
227  * \param[in] manifest A pointer to a buffer containing a manifest
228  * object
229  *
230  * \param[in] manifest_size The size of the manifest parameter
231  *
232  * \param[in] manifest_dependency Output parameter containing the hash of a
233  * required manifest when
234  * PSA_ERROR_DEPENDENCY_NEEDED is returned
235  *
236  * \return A status indicating the success/failure of the operation
237  *
238  * \retval PSA_SUCCESS The manifest is persisted
239  * \retval PSA_ERROR_NOT_PERMITTED The manifest is too old to be
240  * installed
241  * \retval PSA_ERROR_WRONG_DEVICE The manifest is not intended for this
242  * device
243  * \retval PSA_ERROR_INVALID_SIGNATURE The manifest signature is not valid
244  * \retval PSA_ERROR_DEPENDENCY_NEEDED A different manifest is needed
245  * \retval PSA_ERROR_INVALID_ARGUMENT Parameter size is 0 or a pointer
246  * parameter is NULL
247  * \retval PSA_ERROR_COMMUNICATION_FAILURE The system could not communicate with
248  * the installer
249  * \retval PSA_ERROR_NOT_SUPPORTED This function is not implemented
250  * \retval PSA_ERROR_CURRENTLY_INSTALLING An existing manifest for image ID is
251  * currently being installed and is
252  * locked from writing
253  * \retval PSA_ERROR_GENERIC_ERROR A fatal error occurred
254  */
255 psa_status_t psa_fwu_set_manifest(psa_image_id_t image_id,
256  const void *manifest,
257  size_t manifest_size,
258  psa_hash_t *manifest_dependency);
259 
260 
261 #ifdef __cplusplus
262 }
263 #endif
264 #endif /* PSA_UPDATE_H */
info
The key size.
Definition: kvstore_global_api.h:38
tfm_image_version_s
Definition: update.h:65
psa_hash_s
Definition: update.h:78
psa_status_t
int32_t psa_status_t
Function return status.
Definition: TARGET_MBED_PSA_SRV/inc/psa/crypto_types.h:53
tfm_image_info_s
Definition: update.h:72
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