Simon Glass | 10a1eca | 2013-05-07 06:11:54 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2013, Google Inc. |
| 3 | * |
| 4 | * (C) Copyright 2008 Semihalf |
| 5 | * |
| 6 | * (C) Copyright 2000-2006 |
| 7 | * Wolfgang Denk, DENX Software Engineering, wd@denx.de. |
| 8 | * |
Wolfgang Denk | d79de1d | 2013-07-08 09:37:19 +0200 | [diff] [blame] | 9 | * SPDX-License-Identifier: GPL-2.0+ |
Simon Glass | 10a1eca | 2013-05-07 06:11:54 +0000 | [diff] [blame] | 10 | */ |
| 11 | |
| 12 | #include "mkimage.h" |
Simon Glass | a51991d | 2014-06-12 07:24:53 -0600 | [diff] [blame] | 13 | #include <bootm.h> |
Simon Glass | 10a1eca | 2013-05-07 06:11:54 +0000 | [diff] [blame] | 14 | #include <image.h> |
Simon Glass | fbabc0f | 2013-06-13 15:10:01 -0700 | [diff] [blame] | 15 | #include <version.h> |
Simon Glass | 10a1eca | 2013-05-07 06:11:54 +0000 | [diff] [blame] | 16 | |
| 17 | /** |
Simon Glass | 0ce6e3d | 2013-05-07 06:11:56 +0000 | [diff] [blame] | 18 | * fit_set_hash_value - set hash value in requested has node |
| 19 | * @fit: pointer to the FIT format image header |
| 20 | * @noffset: hash node offset |
| 21 | * @value: hash value to be set |
| 22 | * @value_len: hash value length |
| 23 | * |
| 24 | * fit_set_hash_value() attempts to set hash value in a node at offset |
| 25 | * given and returns operation status to the caller. |
| 26 | * |
| 27 | * returns |
| 28 | * 0, on success |
| 29 | * -1, on failure |
| 30 | */ |
| 31 | static int fit_set_hash_value(void *fit, int noffset, uint8_t *value, |
| 32 | int value_len) |
| 33 | { |
| 34 | int ret; |
| 35 | |
| 36 | ret = fdt_setprop(fit, noffset, FIT_VALUE_PROP, value, value_len); |
| 37 | if (ret) { |
| 38 | printf("Can't set hash '%s' property for '%s' node(%s)\n", |
| 39 | FIT_VALUE_PROP, fit_get_name(fit, noffset, NULL), |
| 40 | fdt_strerror(ret)); |
Simon Glass | ec539f7 | 2016-07-03 09:40:44 -0600 | [diff] [blame] | 41 | return ret == -FDT_ERR_NOSPACE ? -ENOSPC : -EIO; |
Simon Glass | 0ce6e3d | 2013-05-07 06:11:56 +0000 | [diff] [blame] | 42 | } |
| 43 | |
| 44 | return 0; |
| 45 | } |
| 46 | |
| 47 | /** |
Simon Glass | 25d6e6b | 2013-05-07 06:11:55 +0000 | [diff] [blame] | 48 | * fit_image_process_hash - Process a single subnode of the images/ node |
| 49 | * |
| 50 | * Check each subnode and process accordingly. For hash nodes we generate |
| 51 | * a hash of the supplised data and store it in the node. |
| 52 | * |
| 53 | * @fit: pointer to the FIT format image header |
| 54 | * @image_name: name of image being processes (used to display errors) |
| 55 | * @noffset: subnode offset |
| 56 | * @data: data to process |
| 57 | * @size: size of data in bytes |
| 58 | * @return 0 if ok, -1 on error |
| 59 | */ |
| 60 | static int fit_image_process_hash(void *fit, const char *image_name, |
| 61 | int noffset, const void *data, size_t size) |
| 62 | { |
| 63 | uint8_t value[FIT_MAX_HASH_LEN]; |
Simon Glass | ee38265 | 2013-05-07 06:12:01 +0000 | [diff] [blame] | 64 | const char *node_name; |
Simon Glass | 25d6e6b | 2013-05-07 06:11:55 +0000 | [diff] [blame] | 65 | int value_len; |
| 66 | char *algo; |
Simon Glass | ec539f7 | 2016-07-03 09:40:44 -0600 | [diff] [blame] | 67 | int ret; |
Simon Glass | 25d6e6b | 2013-05-07 06:11:55 +0000 | [diff] [blame] | 68 | |
Simon Glass | ee38265 | 2013-05-07 06:12:01 +0000 | [diff] [blame] | 69 | node_name = fit_get_name(fit, noffset, NULL); |
Simon Glass | 25d6e6b | 2013-05-07 06:11:55 +0000 | [diff] [blame] | 70 | |
| 71 | if (fit_image_hash_get_algo(fit, noffset, &algo)) { |
| 72 | printf("Can't get hash algo property for '%s' hash node in '%s' image node\n", |
Simon Glass | ee38265 | 2013-05-07 06:12:01 +0000 | [diff] [blame] | 73 | node_name, image_name); |
Simon Glass | ec539f7 | 2016-07-03 09:40:44 -0600 | [diff] [blame] | 74 | return -ENOENT; |
Simon Glass | 25d6e6b | 2013-05-07 06:11:55 +0000 | [diff] [blame] | 75 | } |
| 76 | |
| 77 | if (calculate_hash(data, size, algo, value, &value_len)) { |
| 78 | printf("Unsupported hash algorithm (%s) for '%s' hash node in '%s' image node\n", |
Simon Glass | ee38265 | 2013-05-07 06:12:01 +0000 | [diff] [blame] | 79 | algo, node_name, image_name); |
Simon Glass | ec539f7 | 2016-07-03 09:40:44 -0600 | [diff] [blame] | 80 | return -EPROTONOSUPPORT; |
Simon Glass | 25d6e6b | 2013-05-07 06:11:55 +0000 | [diff] [blame] | 81 | } |
| 82 | |
Simon Glass | ec539f7 | 2016-07-03 09:40:44 -0600 | [diff] [blame] | 83 | ret = fit_set_hash_value(fit, noffset, value, value_len); |
| 84 | if (ret) { |
Simon Glass | 25d6e6b | 2013-05-07 06:11:55 +0000 | [diff] [blame] | 85 | printf("Can't set hash value for '%s' hash node in '%s' image node\n", |
Simon Glass | ee38265 | 2013-05-07 06:12:01 +0000 | [diff] [blame] | 86 | node_name, image_name); |
Simon Glass | ec539f7 | 2016-07-03 09:40:44 -0600 | [diff] [blame] | 87 | return ret; |
Simon Glass | 25d6e6b | 2013-05-07 06:11:55 +0000 | [diff] [blame] | 88 | } |
| 89 | |
| 90 | return 0; |
| 91 | } |
| 92 | |
| 93 | /** |
Simon Glass | fbabc0f | 2013-06-13 15:10:01 -0700 | [diff] [blame] | 94 | * fit_image_write_sig() - write the signature to a FIT |
Simon Glass | 10a1eca | 2013-05-07 06:11:54 +0000 | [diff] [blame] | 95 | * |
Simon Glass | fbabc0f | 2013-06-13 15:10:01 -0700 | [diff] [blame] | 96 | * This writes the signature and signer data to the FIT. |
| 97 | * |
| 98 | * @fit: pointer to the FIT format image header |
| 99 | * @noffset: hash node offset |
| 100 | * @value: signature value to be set |
| 101 | * @value_len: signature value length |
| 102 | * @comment: Text comment to write (NULL for none) |
| 103 | * |
| 104 | * returns |
| 105 | * 0, on success |
| 106 | * -FDT_ERR_..., on failure |
| 107 | */ |
| 108 | static int fit_image_write_sig(void *fit, int noffset, uint8_t *value, |
| 109 | int value_len, const char *comment, const char *region_prop, |
| 110 | int region_proplen) |
| 111 | { |
| 112 | int string_size; |
| 113 | int ret; |
| 114 | |
| 115 | /* |
| 116 | * Get the current string size, before we update the FIT and add |
| 117 | * more |
| 118 | */ |
| 119 | string_size = fdt_size_dt_strings(fit); |
| 120 | |
| 121 | ret = fdt_setprop(fit, noffset, FIT_VALUE_PROP, value, value_len); |
| 122 | if (!ret) { |
| 123 | ret = fdt_setprop_string(fit, noffset, "signer-name", |
| 124 | "mkimage"); |
| 125 | } |
| 126 | if (!ret) { |
| 127 | ret = fdt_setprop_string(fit, noffset, "signer-version", |
| 128 | PLAIN_VERSION); |
| 129 | } |
| 130 | if (comment && !ret) |
| 131 | ret = fdt_setprop_string(fit, noffset, "comment", comment); |
| 132 | if (!ret) |
| 133 | ret = fit_set_timestamp(fit, noffset, time(NULL)); |
| 134 | if (region_prop && !ret) { |
| 135 | uint32_t strdata[2]; |
| 136 | |
| 137 | ret = fdt_setprop(fit, noffset, "hashed-nodes", |
| 138 | region_prop, region_proplen); |
| 139 | strdata[0] = 0; |
| 140 | strdata[1] = cpu_to_fdt32(string_size); |
| 141 | if (!ret) { |
| 142 | ret = fdt_setprop(fit, noffset, "hashed-strings", |
| 143 | strdata, sizeof(strdata)); |
| 144 | } |
| 145 | } |
| 146 | |
| 147 | return ret; |
| 148 | } |
| 149 | |
| 150 | static int fit_image_setup_sig(struct image_sign_info *info, |
| 151 | const char *keydir, void *fit, const char *image_name, |
| 152 | int noffset, const char *require_keys) |
| 153 | { |
| 154 | const char *node_name; |
| 155 | char *algo_name; |
| 156 | |
| 157 | node_name = fit_get_name(fit, noffset, NULL); |
| 158 | if (fit_image_hash_get_algo(fit, noffset, &algo_name)) { |
| 159 | printf("Can't get algo property for '%s' signature node in '%s' image node\n", |
| 160 | node_name, image_name); |
| 161 | return -1; |
| 162 | } |
| 163 | |
| 164 | memset(info, '\0', sizeof(*info)); |
| 165 | info->keydir = keydir; |
| 166 | info->keyname = fdt_getprop(fit, noffset, "key-name-hint", NULL); |
| 167 | info->fit = fit; |
| 168 | info->node_offset = noffset; |
Andrew Duda | 6616c82 | 2016-11-08 18:53:41 +0000 | [diff] [blame] | 169 | info->name = algo_name; |
| 170 | info->checksum = image_get_checksum_algo(algo_name); |
| 171 | info->crypto = image_get_crypto_algo(algo_name); |
Simon Glass | fbabc0f | 2013-06-13 15:10:01 -0700 | [diff] [blame] | 172 | info->require_keys = require_keys; |
Andrew Duda | 6616c82 | 2016-11-08 18:53:41 +0000 | [diff] [blame] | 173 | if (!info->checksum || !info->crypto) { |
Simon Glass | fbabc0f | 2013-06-13 15:10:01 -0700 | [diff] [blame] | 174 | printf("Unsupported signature algorithm (%s) for '%s' signature node in '%s' image node\n", |
| 175 | algo_name, node_name, image_name); |
| 176 | return -1; |
| 177 | } |
| 178 | |
| 179 | return 0; |
| 180 | } |
| 181 | |
| 182 | /** |
| 183 | * fit_image_process_sig- Process a single subnode of the images/ node |
| 184 | * |
| 185 | * Check each subnode and process accordingly. For signature nodes we |
| 186 | * generate a signed hash of the supplised data and store it in the node. |
| 187 | * |
| 188 | * @keydir: Directory containing keys to use for signing |
| 189 | * @keydest: Destination FDT blob to write public keys into |
| 190 | * @fit: pointer to the FIT format image header |
| 191 | * @image_name: name of image being processes (used to display errors) |
| 192 | * @noffset: subnode offset |
| 193 | * @data: data to process |
| 194 | * @size: size of data in bytes |
| 195 | * @comment: Comment to add to signature nodes |
| 196 | * @require_keys: Mark all keys as 'required' |
| 197 | * @return 0 if ok, -1 on error |
| 198 | */ |
| 199 | static int fit_image_process_sig(const char *keydir, void *keydest, |
| 200 | void *fit, const char *image_name, |
| 201 | int noffset, const void *data, size_t size, |
| 202 | const char *comment, int require_keys) |
| 203 | { |
| 204 | struct image_sign_info info; |
| 205 | struct image_region region; |
| 206 | const char *node_name; |
| 207 | uint8_t *value; |
| 208 | uint value_len; |
| 209 | int ret; |
| 210 | |
| 211 | if (fit_image_setup_sig(&info, keydir, fit, image_name, noffset, |
| 212 | require_keys ? "image" : NULL)) |
| 213 | return -1; |
| 214 | |
| 215 | node_name = fit_get_name(fit, noffset, NULL); |
| 216 | region.data = data; |
| 217 | region.size = size; |
Andrew Duda | 6616c82 | 2016-11-08 18:53:41 +0000 | [diff] [blame] | 218 | ret = info.crypto->sign(&info, ®ion, 1, &value, &value_len); |
Simon Glass | fbabc0f | 2013-06-13 15:10:01 -0700 | [diff] [blame] | 219 | if (ret) { |
| 220 | printf("Failed to sign '%s' signature node in '%s' image node: %d\n", |
| 221 | node_name, image_name, ret); |
| 222 | |
| 223 | /* We allow keys to be missing */ |
| 224 | if (ret == -ENOENT) |
| 225 | return 0; |
| 226 | return -1; |
| 227 | } |
| 228 | |
| 229 | ret = fit_image_write_sig(fit, noffset, value, value_len, comment, |
| 230 | NULL, 0); |
| 231 | if (ret) { |
Simon Glass | 802aa82 | 2014-06-02 22:04:53 -0600 | [diff] [blame] | 232 | if (ret == -FDT_ERR_NOSPACE) |
| 233 | return -ENOSPC; |
| 234 | printf("Can't write signature for '%s' signature node in '%s' conf node: %s\n", |
Simon Glass | fbabc0f | 2013-06-13 15:10:01 -0700 | [diff] [blame] | 235 | node_name, image_name, fdt_strerror(ret)); |
| 236 | return -1; |
| 237 | } |
| 238 | free(value); |
| 239 | |
| 240 | /* Get keyname again, as FDT has changed and invalidated our pointer */ |
| 241 | info.keyname = fdt_getprop(fit, noffset, "key-name-hint", NULL); |
| 242 | |
mario.six@gdsys.cc | dc4053a | 2016-07-22 08:58:40 +0200 | [diff] [blame] | 243 | if (keydest) |
Andrew Duda | 6616c82 | 2016-11-08 18:53:41 +0000 | [diff] [blame] | 244 | ret = info.crypto->add_verify_data(&info, keydest); |
mario.six@gdsys.cc | dc4053a | 2016-07-22 08:58:40 +0200 | [diff] [blame] | 245 | else |
| 246 | return -1; |
mario.six@gdsys.cc | d019e15 | 2016-07-19 11:07:06 +0200 | [diff] [blame] | 247 | |
mario.six@gdsys.cc | dc4053a | 2016-07-22 08:58:40 +0200 | [diff] [blame] | 248 | /* |
| 249 | * Write the public key into the supplied FDT file; this might fail |
mario.six@gdsys.cc | d019e15 | 2016-07-19 11:07:06 +0200 | [diff] [blame] | 250 | * several times, since we try signing with successively increasing |
mario.six@gdsys.cc | dc4053a | 2016-07-22 08:58:40 +0200 | [diff] [blame] | 251 | * size values |
| 252 | */ |
mario.six@gdsys.cc | d019e15 | 2016-07-19 11:07:06 +0200 | [diff] [blame] | 253 | if (keydest && ret) |
| 254 | return ret; |
Simon Glass | fbabc0f | 2013-06-13 15:10:01 -0700 | [diff] [blame] | 255 | |
| 256 | return 0; |
| 257 | } |
| 258 | |
| 259 | /** |
| 260 | * fit_image_add_verification_data() - calculate/set verig. data for image node |
| 261 | * |
| 262 | * This adds hash and signature values for an component image node. |
Simon Glass | ee38265 | 2013-05-07 06:12:01 +0000 | [diff] [blame] | 263 | * |
| 264 | * All existing hash subnodes are checked, if algorithm property is set to |
| 265 | * one of the supported hash algorithms, hash value is computed and |
| 266 | * corresponding hash node property is set, for example: |
Simon Glass | 10a1eca | 2013-05-07 06:11:54 +0000 | [diff] [blame] | 267 | * |
| 268 | * Input component image node structure: |
| 269 | * |
| 270 | * o image@1 (at image_noffset) |
| 271 | * | - data = [binary data] |
| 272 | * o hash@1 |
| 273 | * |- algo = "sha1" |
| 274 | * |
| 275 | * Output component image node structure: |
| 276 | * |
| 277 | * o image@1 (at image_noffset) |
| 278 | * | - data = [binary data] |
| 279 | * o hash@1 |
| 280 | * |- algo = "sha1" |
| 281 | * |- value = sha1(data) |
| 282 | * |
Simon Glass | ee38265 | 2013-05-07 06:12:01 +0000 | [diff] [blame] | 283 | * For signature details, please see doc/uImage.FIT/signature.txt |
| 284 | * |
Simon Glass | fbabc0f | 2013-06-13 15:10:01 -0700 | [diff] [blame] | 285 | * @keydir Directory containing *.key and *.crt files (or NULL) |
| 286 | * @keydest FDT Blob to write public keys into (NULL if none) |
Simon Glass | ee38265 | 2013-05-07 06:12:01 +0000 | [diff] [blame] | 287 | * @fit: Pointer to the FIT format image header |
| 288 | * @image_noffset: Requested component image node |
Simon Glass | fbabc0f | 2013-06-13 15:10:01 -0700 | [diff] [blame] | 289 | * @comment: Comment to add to signature nodes |
| 290 | * @require_keys: Mark all keys as 'required' |
Simon Glass | ee38265 | 2013-05-07 06:12:01 +0000 | [diff] [blame] | 291 | * @return: 0 on success, <0 on failure |
Simon Glass | 10a1eca | 2013-05-07 06:11:54 +0000 | [diff] [blame] | 292 | */ |
Simon Glass | fbabc0f | 2013-06-13 15:10:01 -0700 | [diff] [blame] | 293 | int fit_image_add_verification_data(const char *keydir, void *keydest, |
| 294 | void *fit, int image_noffset, const char *comment, |
| 295 | int require_keys) |
Simon Glass | 10a1eca | 2013-05-07 06:11:54 +0000 | [diff] [blame] | 296 | { |
Simon Glass | ee38265 | 2013-05-07 06:12:01 +0000 | [diff] [blame] | 297 | const char *image_name; |
Simon Glass | 10a1eca | 2013-05-07 06:11:54 +0000 | [diff] [blame] | 298 | const void *data; |
| 299 | size_t size; |
Simon Glass | 10a1eca | 2013-05-07 06:11:54 +0000 | [diff] [blame] | 300 | int noffset; |
Simon Glass | 10a1eca | 2013-05-07 06:11:54 +0000 | [diff] [blame] | 301 | |
| 302 | /* Get image data and data length */ |
| 303 | if (fit_image_get_data(fit, image_noffset, &data, &size)) { |
| 304 | printf("Can't get image data/size\n"); |
| 305 | return -1; |
| 306 | } |
| 307 | |
Simon Glass | 25d6e6b | 2013-05-07 06:11:55 +0000 | [diff] [blame] | 308 | image_name = fit_get_name(fit, image_noffset, NULL); |
| 309 | |
Simon Glass | 10a1eca | 2013-05-07 06:11:54 +0000 | [diff] [blame] | 310 | /* Process all hash subnodes of the component image node */ |
Simon Glass | ee38265 | 2013-05-07 06:12:01 +0000 | [diff] [blame] | 311 | for (noffset = fdt_first_subnode(fit, image_noffset); |
| 312 | noffset >= 0; |
| 313 | noffset = fdt_next_subnode(fit, noffset)) { |
| 314 | const char *node_name; |
| 315 | int ret = 0; |
| 316 | |
| 317 | /* |
| 318 | * Check subnode name, must be equal to "hash" or "signature". |
| 319 | * Multiple hash nodes require unique unit node |
| 320 | * names, e.g. hash@1, hash@2, signature@1, etc. |
| 321 | */ |
| 322 | node_name = fit_get_name(fit, noffset, NULL); |
| 323 | if (!strncmp(node_name, FIT_HASH_NODENAME, |
| 324 | strlen(FIT_HASH_NODENAME))) { |
| 325 | ret = fit_image_process_hash(fit, image_name, noffset, |
| 326 | data, size); |
Simon Glass | fbabc0f | 2013-06-13 15:10:01 -0700 | [diff] [blame] | 327 | } else if (IMAGE_ENABLE_SIGN && keydir && |
| 328 | !strncmp(node_name, FIT_SIG_NODENAME, |
| 329 | strlen(FIT_SIG_NODENAME))) { |
| 330 | ret = fit_image_process_sig(keydir, keydest, |
| 331 | fit, image_name, noffset, data, size, |
| 332 | comment, require_keys); |
Simon Glass | 10a1eca | 2013-05-07 06:11:54 +0000 | [diff] [blame] | 333 | } |
Simon Glass | ee38265 | 2013-05-07 06:12:01 +0000 | [diff] [blame] | 334 | if (ret) |
Simon Glass | ec539f7 | 2016-07-03 09:40:44 -0600 | [diff] [blame] | 335 | return ret; |
Simon Glass | ee38265 | 2013-05-07 06:12:01 +0000 | [diff] [blame] | 336 | } |
| 337 | |
| 338 | return 0; |
| 339 | } |
| 340 | |
Simon Glass | 56ab8d6 | 2013-06-13 15:10:09 -0700 | [diff] [blame] | 341 | struct strlist { |
| 342 | int count; |
| 343 | char **strings; |
| 344 | }; |
| 345 | |
| 346 | static void strlist_init(struct strlist *list) |
| 347 | { |
| 348 | memset(list, '\0', sizeof(*list)); |
| 349 | } |
| 350 | |
| 351 | static void strlist_free(struct strlist *list) |
| 352 | { |
| 353 | int i; |
| 354 | |
| 355 | for (i = 0; i < list->count; i++) |
| 356 | free(list->strings[i]); |
| 357 | free(list->strings); |
| 358 | } |
| 359 | |
| 360 | static int strlist_add(struct strlist *list, const char *str) |
| 361 | { |
| 362 | char *dup; |
| 363 | |
| 364 | dup = strdup(str); |
| 365 | list->strings = realloc(list->strings, |
| 366 | (list->count + 1) * sizeof(char *)); |
| 367 | if (!list || !str) |
| 368 | return -1; |
| 369 | list->strings[list->count++] = dup; |
| 370 | |
| 371 | return 0; |
| 372 | } |
| 373 | |
| 374 | static const char *fit_config_get_image_list(void *fit, int noffset, |
| 375 | int *lenp, int *allow_missingp) |
| 376 | { |
| 377 | static const char default_list[] = FIT_KERNEL_PROP "\0" |
| 378 | FIT_FDT_PROP; |
| 379 | const char *prop; |
| 380 | |
| 381 | /* If there is an "image" property, use that */ |
| 382 | prop = fdt_getprop(fit, noffset, "sign-images", lenp); |
| 383 | if (prop) { |
| 384 | *allow_missingp = 0; |
| 385 | return *lenp ? prop : NULL; |
| 386 | } |
| 387 | |
| 388 | /* Default image list */ |
| 389 | *allow_missingp = 1; |
| 390 | *lenp = sizeof(default_list); |
| 391 | |
| 392 | return default_list; |
| 393 | } |
| 394 | |
| 395 | static int fit_config_get_hash_list(void *fit, int conf_noffset, |
| 396 | int sig_offset, struct strlist *node_inc) |
| 397 | { |
| 398 | int allow_missing; |
| 399 | const char *prop, *iname, *end; |
| 400 | const char *conf_name, *sig_name; |
| 401 | char name[200], path[200]; |
| 402 | int image_count; |
| 403 | int ret, len; |
| 404 | |
| 405 | conf_name = fit_get_name(fit, conf_noffset, NULL); |
| 406 | sig_name = fit_get_name(fit, sig_offset, NULL); |
| 407 | |
| 408 | /* |
| 409 | * Build a list of nodes we need to hash. We always need the root |
| 410 | * node and the configuration. |
| 411 | */ |
| 412 | strlist_init(node_inc); |
| 413 | snprintf(name, sizeof(name), "%s/%s", FIT_CONFS_PATH, conf_name); |
| 414 | if (strlist_add(node_inc, "/") || |
| 415 | strlist_add(node_inc, name)) |
| 416 | goto err_mem; |
| 417 | |
| 418 | /* Get a list of images that we intend to sign */ |
Heiko Schocher | fdfd520 | 2014-03-03 12:19:23 +0100 | [diff] [blame] | 419 | prop = fit_config_get_image_list(fit, sig_offset, &len, |
Simon Glass | 56ab8d6 | 2013-06-13 15:10:09 -0700 | [diff] [blame] | 420 | &allow_missing); |
| 421 | if (!prop) |
| 422 | return 0; |
| 423 | |
| 424 | /* Locate the images */ |
| 425 | end = prop + len; |
| 426 | image_count = 0; |
| 427 | for (iname = prop; iname < end; iname += strlen(iname) + 1) { |
| 428 | int noffset; |
| 429 | int image_noffset; |
| 430 | int hash_count; |
| 431 | |
| 432 | image_noffset = fit_conf_get_prop_node(fit, conf_noffset, |
| 433 | iname); |
| 434 | if (image_noffset < 0) { |
| 435 | printf("Failed to find image '%s' in configuration '%s/%s'\n", |
| 436 | iname, conf_name, sig_name); |
| 437 | if (allow_missing) |
| 438 | continue; |
| 439 | |
| 440 | return -ENOENT; |
| 441 | } |
| 442 | |
| 443 | ret = fdt_get_path(fit, image_noffset, path, sizeof(path)); |
| 444 | if (ret < 0) |
| 445 | goto err_path; |
| 446 | if (strlist_add(node_inc, path)) |
| 447 | goto err_mem; |
| 448 | |
| 449 | snprintf(name, sizeof(name), "%s/%s", FIT_CONFS_PATH, |
| 450 | conf_name); |
| 451 | |
| 452 | /* Add all this image's hashes */ |
| 453 | hash_count = 0; |
| 454 | for (noffset = fdt_first_subnode(fit, image_noffset); |
| 455 | noffset >= 0; |
| 456 | noffset = fdt_next_subnode(fit, noffset)) { |
| 457 | const char *name = fit_get_name(fit, noffset, NULL); |
| 458 | |
| 459 | if (strncmp(name, FIT_HASH_NODENAME, |
| 460 | strlen(FIT_HASH_NODENAME))) |
| 461 | continue; |
| 462 | ret = fdt_get_path(fit, noffset, path, sizeof(path)); |
| 463 | if (ret < 0) |
| 464 | goto err_path; |
| 465 | if (strlist_add(node_inc, path)) |
| 466 | goto err_mem; |
| 467 | hash_count++; |
| 468 | } |
| 469 | |
| 470 | if (!hash_count) { |
| 471 | printf("Failed to find any hash nodes in configuration '%s/%s' image '%s' - without these it is not possible to verify this image\n", |
| 472 | conf_name, sig_name, iname); |
| 473 | return -ENOMSG; |
| 474 | } |
| 475 | |
| 476 | image_count++; |
| 477 | } |
| 478 | |
| 479 | if (!image_count) { |
| 480 | printf("Failed to find any images for configuration '%s/%s'\n", |
| 481 | conf_name, sig_name); |
| 482 | return -ENOMSG; |
| 483 | } |
| 484 | |
| 485 | return 0; |
| 486 | |
| 487 | err_mem: |
| 488 | printf("Out of memory processing configuration '%s/%s'\n", conf_name, |
| 489 | sig_name); |
| 490 | return -ENOMEM; |
| 491 | |
| 492 | err_path: |
| 493 | printf("Failed to get path for image '%s' in configuration '%s/%s': %s\n", |
| 494 | iname, conf_name, sig_name, fdt_strerror(ret)); |
| 495 | return -ENOENT; |
| 496 | } |
| 497 | |
| 498 | static int fit_config_get_data(void *fit, int conf_noffset, int noffset, |
| 499 | struct image_region **regionp, int *region_countp, |
| 500 | char **region_propp, int *region_proplen) |
| 501 | { |
| 502 | char * const exc_prop[] = {"data"}; |
| 503 | struct strlist node_inc; |
| 504 | struct image_region *region; |
| 505 | struct fdt_region fdt_regions[100]; |
| 506 | const char *conf_name, *sig_name; |
| 507 | char path[200]; |
| 508 | int count, i; |
| 509 | char *region_prop; |
| 510 | int ret, len; |
| 511 | |
| 512 | conf_name = fit_get_name(fit, conf_noffset, NULL); |
| 513 | sig_name = fit_get_name(fit, conf_noffset, NULL); |
| 514 | debug("%s: conf='%s', sig='%s'\n", __func__, conf_name, sig_name); |
| 515 | |
| 516 | /* Get a list of nodes we want to hash */ |
| 517 | ret = fit_config_get_hash_list(fit, conf_noffset, noffset, &node_inc); |
| 518 | if (ret) |
| 519 | return ret; |
| 520 | |
| 521 | /* Get a list of regions to hash */ |
| 522 | count = fdt_find_regions(fit, node_inc.strings, node_inc.count, |
| 523 | exc_prop, ARRAY_SIZE(exc_prop), |
| 524 | fdt_regions, ARRAY_SIZE(fdt_regions), |
| 525 | path, sizeof(path), 1); |
| 526 | if (count < 0) { |
| 527 | printf("Failed to hash configuration '%s/%s': %s\n", conf_name, |
| 528 | sig_name, fdt_strerror(ret)); |
| 529 | return -EIO; |
| 530 | } |
| 531 | if (count == 0) { |
| 532 | printf("No data to hash for configuration '%s/%s': %s\n", |
| 533 | conf_name, sig_name, fdt_strerror(ret)); |
| 534 | return -EINVAL; |
| 535 | } |
| 536 | |
| 537 | /* Build our list of data blocks */ |
| 538 | region = fit_region_make_list(fit, fdt_regions, count, NULL); |
| 539 | if (!region) { |
| 540 | printf("Out of memory hashing configuration '%s/%s'\n", |
| 541 | conf_name, sig_name); |
| 542 | return -ENOMEM; |
| 543 | } |
| 544 | |
| 545 | /* Create a list of all hashed properties */ |
| 546 | debug("Hash nodes:\n"); |
| 547 | for (i = len = 0; i < node_inc.count; i++) { |
| 548 | debug(" %s\n", node_inc.strings[i]); |
| 549 | len += strlen(node_inc.strings[i]) + 1; |
| 550 | } |
| 551 | region_prop = malloc(len); |
| 552 | if (!region_prop) { |
| 553 | printf("Out of memory setting up regions for configuration '%s/%s'\n", |
| 554 | conf_name, sig_name); |
| 555 | return -ENOMEM; |
| 556 | } |
| 557 | for (i = len = 0; i < node_inc.count; |
| 558 | len += strlen(node_inc.strings[i]) + 1, i++) |
| 559 | strcpy(region_prop + len, node_inc.strings[i]); |
| 560 | strlist_free(&node_inc); |
| 561 | |
| 562 | *region_countp = count; |
| 563 | *regionp = region; |
| 564 | *region_propp = region_prop; |
| 565 | *region_proplen = len; |
| 566 | |
| 567 | return 0; |
| 568 | } |
| 569 | |
| 570 | static int fit_config_process_sig(const char *keydir, void *keydest, |
| 571 | void *fit, const char *conf_name, int conf_noffset, |
| 572 | int noffset, const char *comment, int require_keys) |
| 573 | { |
| 574 | struct image_sign_info info; |
| 575 | const char *node_name; |
| 576 | struct image_region *region; |
| 577 | char *region_prop; |
| 578 | int region_proplen; |
| 579 | int region_count; |
| 580 | uint8_t *value; |
| 581 | uint value_len; |
| 582 | int ret; |
| 583 | |
| 584 | node_name = fit_get_name(fit, noffset, NULL); |
| 585 | if (fit_config_get_data(fit, conf_noffset, noffset, ®ion, |
| 586 | ®ion_count, ®ion_prop, ®ion_proplen)) |
| 587 | return -1; |
| 588 | |
| 589 | if (fit_image_setup_sig(&info, keydir, fit, conf_name, noffset, |
| 590 | require_keys ? "conf" : NULL)) |
| 591 | return -1; |
| 592 | |
Andrew Duda | 6616c82 | 2016-11-08 18:53:41 +0000 | [diff] [blame] | 593 | ret = info.crypto->sign(&info, region, region_count, &value, |
| 594 | &value_len); |
Simon Glass | 56ab8d6 | 2013-06-13 15:10:09 -0700 | [diff] [blame] | 595 | free(region); |
| 596 | if (ret) { |
| 597 | printf("Failed to sign '%s' signature node in '%s' conf node\n", |
| 598 | node_name, conf_name); |
| 599 | |
| 600 | /* We allow keys to be missing */ |
| 601 | if (ret == -ENOENT) |
| 602 | return 0; |
| 603 | return -1; |
| 604 | } |
| 605 | |
Simon Glass | 802aa82 | 2014-06-02 22:04:53 -0600 | [diff] [blame] | 606 | ret = fit_image_write_sig(fit, noffset, value, value_len, comment, |
| 607 | region_prop, region_proplen); |
| 608 | if (ret) { |
| 609 | if (ret == -FDT_ERR_NOSPACE) |
| 610 | return -ENOSPC; |
| 611 | printf("Can't write signature for '%s' signature node in '%s' conf node: %s\n", |
| 612 | node_name, conf_name, fdt_strerror(ret)); |
Simon Glass | 56ab8d6 | 2013-06-13 15:10:09 -0700 | [diff] [blame] | 613 | return -1; |
| 614 | } |
| 615 | free(value); |
| 616 | free(region_prop); |
| 617 | |
| 618 | /* Get keyname again, as FDT has changed and invalidated our pointer */ |
| 619 | info.keyname = fdt_getprop(fit, noffset, "key-name-hint", NULL); |
| 620 | |
| 621 | /* Write the public key into the supplied FDT file */ |
Simon Glass | 802aa82 | 2014-06-02 22:04:53 -0600 | [diff] [blame] | 622 | if (keydest) { |
Andrew Duda | 6616c82 | 2016-11-08 18:53:41 +0000 | [diff] [blame] | 623 | ret = info.crypto->add_verify_data(&info, keydest); |
Simon Glass | 9423bad | 2014-06-12 07:24:42 -0600 | [diff] [blame] | 624 | if (ret == -ENOSPC) |
| 625 | return -ENOSPC; |
Simon Glass | 802aa82 | 2014-06-02 22:04:53 -0600 | [diff] [blame] | 626 | if (ret) { |
| 627 | printf("Failed to add verification data for '%s' signature node in '%s' image node\n", |
| 628 | node_name, conf_name); |
Simon Glass | 802aa82 | 2014-06-02 22:04:53 -0600 | [diff] [blame] | 629 | } |
Simon Glass | 9423bad | 2014-06-12 07:24:42 -0600 | [diff] [blame] | 630 | return ret; |
Simon Glass | 56ab8d6 | 2013-06-13 15:10:09 -0700 | [diff] [blame] | 631 | } |
| 632 | |
| 633 | return 0; |
| 634 | } |
| 635 | |
| 636 | static int fit_config_add_verification_data(const char *keydir, void *keydest, |
| 637 | void *fit, int conf_noffset, const char *comment, |
| 638 | int require_keys) |
| 639 | { |
| 640 | const char *conf_name; |
| 641 | int noffset; |
| 642 | |
| 643 | conf_name = fit_get_name(fit, conf_noffset, NULL); |
| 644 | |
| 645 | /* Process all hash subnodes of the configuration node */ |
| 646 | for (noffset = fdt_first_subnode(fit, conf_noffset); |
| 647 | noffset >= 0; |
| 648 | noffset = fdt_next_subnode(fit, noffset)) { |
| 649 | const char *node_name; |
| 650 | int ret = 0; |
| 651 | |
| 652 | node_name = fit_get_name(fit, noffset, NULL); |
| 653 | if (!strncmp(node_name, FIT_SIG_NODENAME, |
| 654 | strlen(FIT_SIG_NODENAME))) { |
| 655 | ret = fit_config_process_sig(keydir, keydest, |
| 656 | fit, conf_name, conf_noffset, noffset, comment, |
| 657 | require_keys); |
| 658 | } |
| 659 | if (ret) |
| 660 | return ret; |
| 661 | } |
| 662 | |
| 663 | return 0; |
| 664 | } |
| 665 | |
Simon Glass | fbabc0f | 2013-06-13 15:10:01 -0700 | [diff] [blame] | 666 | int fit_add_verification_data(const char *keydir, void *keydest, void *fit, |
| 667 | const char *comment, int require_keys) |
Simon Glass | ee38265 | 2013-05-07 06:12:01 +0000 | [diff] [blame] | 668 | { |
Simon Glass | 56ab8d6 | 2013-06-13 15:10:09 -0700 | [diff] [blame] | 669 | int images_noffset, confs_noffset; |
Simon Glass | ee38265 | 2013-05-07 06:12:01 +0000 | [diff] [blame] | 670 | int noffset; |
| 671 | int ret; |
| 672 | |
| 673 | /* Find images parent node offset */ |
| 674 | images_noffset = fdt_path_offset(fit, FIT_IMAGES_PATH); |
| 675 | if (images_noffset < 0) { |
| 676 | printf("Can't find images parent node '%s' (%s)\n", |
| 677 | FIT_IMAGES_PATH, fdt_strerror(images_noffset)); |
| 678 | return images_noffset; |
| 679 | } |
| 680 | |
| 681 | /* Process its subnodes, print out component images details */ |
| 682 | for (noffset = fdt_first_subnode(fit, images_noffset); |
| 683 | noffset >= 0; |
| 684 | noffset = fdt_next_subnode(fit, noffset)) { |
| 685 | /* |
| 686 | * Direct child node of the images parent node, |
| 687 | * i.e. component image node. |
| 688 | */ |
Simon Glass | fbabc0f | 2013-06-13 15:10:01 -0700 | [diff] [blame] | 689 | ret = fit_image_add_verification_data(keydir, keydest, |
| 690 | fit, noffset, comment, require_keys); |
Simon Glass | ee38265 | 2013-05-07 06:12:01 +0000 | [diff] [blame] | 691 | if (ret) |
| 692 | return ret; |
Simon Glass | 10a1eca | 2013-05-07 06:11:54 +0000 | [diff] [blame] | 693 | } |
| 694 | |
Simon Glass | 56ab8d6 | 2013-06-13 15:10:09 -0700 | [diff] [blame] | 695 | /* If there are no keys, we can't sign configurations */ |
| 696 | if (!IMAGE_ENABLE_SIGN || !keydir) |
| 697 | return 0; |
| 698 | |
| 699 | /* Find configurations parent node offset */ |
| 700 | confs_noffset = fdt_path_offset(fit, FIT_CONFS_PATH); |
| 701 | if (confs_noffset < 0) { |
| 702 | printf("Can't find images parent node '%s' (%s)\n", |
Heiko Schocher | 441f48d | 2014-08-11 11:02:17 +0200 | [diff] [blame] | 703 | FIT_CONFS_PATH, fdt_strerror(confs_noffset)); |
Simon Glass | 56ab8d6 | 2013-06-13 15:10:09 -0700 | [diff] [blame] | 704 | return -ENOENT; |
| 705 | } |
| 706 | |
| 707 | /* Process its subnodes, print out component images details */ |
| 708 | for (noffset = fdt_first_subnode(fit, confs_noffset); |
| 709 | noffset >= 0; |
| 710 | noffset = fdt_next_subnode(fit, noffset)) { |
| 711 | ret = fit_config_add_verification_data(keydir, keydest, |
| 712 | fit, noffset, comment, |
| 713 | require_keys); |
| 714 | if (ret) |
| 715 | return ret; |
| 716 | } |
| 717 | |
Simon Glass | 10a1eca | 2013-05-07 06:11:54 +0000 | [diff] [blame] | 718 | return 0; |
| 719 | } |
Heiko Schocher | d7b4232 | 2014-03-03 12:19:30 +0100 | [diff] [blame] | 720 | |
| 721 | #ifdef CONFIG_FIT_SIGNATURE |
Simon Glass | a51991d | 2014-06-12 07:24:53 -0600 | [diff] [blame] | 722 | int fit_check_sign(const void *fit, const void *key) |
Heiko Schocher | d7b4232 | 2014-03-03 12:19:30 +0100 | [diff] [blame] | 723 | { |
| 724 | int cfg_noffset; |
| 725 | int ret; |
| 726 | |
Simon Glass | a51991d | 2014-06-12 07:24:53 -0600 | [diff] [blame] | 727 | cfg_noffset = fit_conf_get_node(fit, NULL); |
Heiko Schocher | d7b4232 | 2014-03-03 12:19:30 +0100 | [diff] [blame] | 728 | if (!cfg_noffset) |
| 729 | return -1; |
| 730 | |
Simon Glass | a51991d | 2014-06-12 07:24:53 -0600 | [diff] [blame] | 731 | printf("Verifying Hash Integrity ... "); |
| 732 | ret = fit_config_verify(fit, cfg_noffset); |
| 733 | if (ret) |
| 734 | return ret; |
| 735 | ret = bootm_host_load_images(fit, cfg_noffset); |
| 736 | |
Heiko Schocher | d7b4232 | 2014-03-03 12:19:30 +0100 | [diff] [blame] | 737 | return ret; |
| 738 | } |
| 739 | #endif |