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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 | // SPDX-License-Identifier: GPL-2.0+ /* * Copyright (C) 2014 Marek Vasut <marex@denx.de> * Copyright (C) 2025 Ion Agorria <ion@agorria.com> * * Command for AES-[128/192/256] operations. */ #include <command.h> #include <uboot_aes.h> #include <malloc.h> #include <asm/byteorder.h> #include <linux/compiler.h> #include <mapmem.h> #include <vsprintf.h> #include <dm/uclass.h> #include <dm/device.h> u32 aes_get_key_len(char *command) { u32 key_len = AES128_KEY_LENGTH; if (!strcmp(command, "aes.192")) key_len = AES192_KEY_LENGTH; else if (!strcmp(command, "aes.256")) key_len = AES256_KEY_LENGTH; return key_len; } int aes_get_driver(struct udevice **dev) { int ret; ret = uclass_get_device(UCLASS_AES, 0, dev); if (ret) { printf("Failed to get AES driver: %d\n", ret); return ret; } return 0; } int cmd_aes_cbc_simple(int argc, char *const argv[], u32 key_len) { uint32_t key_addr, iv_addr, src_addr, dst_addr, len; uint8_t *key_ptr, *iv_ptr, *src_ptr, *dst_ptr; u8 key_exp[AES256_EXPAND_KEY_LENGTH]; u32 aes_blocks; int enc; if (argc != 7) return CMD_RET_USAGE; if (!strncmp(argv[1], "enc", 3)) enc = 1; else if (!strncmp(argv[1], "dec", 3)) enc = 0; else return CMD_RET_USAGE; key_addr = hextoul(argv[2], NULL); iv_addr = hextoul(argv[3], NULL); src_addr = hextoul(argv[4], NULL); dst_addr = hextoul(argv[5], NULL); len = hextoul(argv[6], NULL); key_ptr = (uint8_t *)map_sysmem(key_addr, key_len); iv_ptr = (uint8_t *)map_sysmem(iv_addr, 128 / 8); src_ptr = (uint8_t *)map_sysmem(src_addr, len); dst_ptr = (uint8_t *)map_sysmem(dst_addr, len); /* First we expand the key. */ aes_expand_key(key_ptr, key_len, key_exp); /* Calculate the number of AES blocks to encrypt. */ aes_blocks = DIV_ROUND_UP(len, AES_BLOCK_LENGTH); if (enc) aes_cbc_encrypt_blocks(key_len, key_exp, iv_ptr, src_ptr, dst_ptr, aes_blocks); else aes_cbc_decrypt_blocks(key_len, key_exp, iv_ptr, src_ptr, dst_ptr, aes_blocks); unmap_sysmem(key_ptr); unmap_sysmem(iv_ptr); unmap_sysmem(src_ptr); unmap_sysmem(dst_ptr); return CMD_RET_SUCCESS; } int cmd_aes_get_slots(void) { struct udevice *dev; u8 slots; int ret; ret = aes_get_driver(&dev); if (ret) return ret; slots = dm_aes_get_available_key_slots(dev); printf("Available slots: %d\n", slots); return CMD_RET_SUCCESS; } int cmd_aes_set_key(int argc, char *const argv[], u32 key_len) { struct udevice *dev; u32 key_addr, slot; u8 *key_ptr; int ret; if (argc != 4) return CMD_RET_USAGE; ret = aes_get_driver(&dev); if (ret) return ret; key_addr = hextoul(argv[2], NULL); slot = hextoul(argv[3], NULL); key_ptr = (uint8_t *)map_sysmem(key_addr, key_len); ret = dm_aes_set_key_for_key_slot(dev, key_len * 8, key_ptr, slot); unmap_sysmem(key_ptr); if (ret) { printf("Unable to set key at slot: %d\n", ret); return CMD_RET_FAILURE; } return CMD_RET_SUCCESS; } int cmd_aes_select_slot(int argc, char *const argv[], u32 key_len) { struct udevice *dev; u32 slot; int ret; if (argc != 3) return CMD_RET_USAGE; ret = aes_get_driver(&dev); if (ret) return ret; slot = hextoul(argv[2], NULL); ret = dm_aes_select_key_slot(dev, key_len * 8, slot); if (ret) { printf("Unable to select key slot: %d\n", ret); return CMD_RET_FAILURE; } return CMD_RET_SUCCESS; } int cmd_aes_ecb(int argc, char *const argv[], u32 key_len) { struct udevice *dev; u32 src_addr, dst_addr, len; u8 *src_ptr, *dst_ptr; u32 aes_blocks; int enc, ret; if (argc != 6) return CMD_RET_USAGE; ret = aes_get_driver(&dev); if (ret) return ret; if (!strncmp(argv[1], "enc", 3)) enc = 1; else if (!strncmp(argv[1], "dec", 3)) enc = 0; else return CMD_RET_USAGE; src_addr = hextoul(argv[3], NULL); dst_addr = hextoul(argv[4], NULL); len = hextoul(argv[5], NULL); src_ptr = (uint8_t *)map_sysmem(src_addr, len); dst_ptr = (uint8_t *)map_sysmem(dst_addr, len); /* Calculate the number of AES blocks to encrypt. */ aes_blocks = DIV_ROUND_UP(len, AES_BLOCK_LENGTH); if (enc) ret = dm_aes_ecb_encrypt(dev, src_ptr, dst_ptr, aes_blocks); else ret = dm_aes_ecb_decrypt(dev, src_ptr, dst_ptr, aes_blocks); unmap_sysmem(src_ptr); unmap_sysmem(dst_ptr); if (ret) { printf("Unable to do ecb operation: %d\n", ret); return CMD_RET_FAILURE; } return CMD_RET_SUCCESS; } int cmd_aes_cbc(int argc, char *const argv[], u32 key_len) { struct udevice *dev; u32 iv_addr, src_addr, dst_addr, len; u8 *iv_ptr, *src_ptr, *dst_ptr; u32 aes_blocks; int enc, ret; if (argc != 7) return CMD_RET_USAGE; ret = aes_get_driver(&dev); if (ret) return ret; if (!strncmp(argv[1], "enc", 3)) enc = 1; else if (!strncmp(argv[1], "dec", 3)) enc = 0; else return CMD_RET_USAGE; iv_addr = hextoul(argv[3], NULL); src_addr = hextoul(argv[4], NULL); dst_addr = hextoul(argv[5], NULL); len = hextoul(argv[6], NULL); iv_ptr = (uint8_t *)map_sysmem(iv_addr, AES_BLOCK_LENGTH); src_ptr = (uint8_t *)map_sysmem(src_addr, len); dst_ptr = (uint8_t *)map_sysmem(dst_addr, len); /* Calculate the number of AES blocks to encrypt. */ aes_blocks = DIV_ROUND_UP(len, AES_BLOCK_LENGTH); if (enc) ret = dm_aes_cbc_encrypt(dev, iv_ptr, src_ptr, dst_ptr, aes_blocks); else ret = dm_aes_cbc_decrypt(dev, iv_ptr, src_ptr, dst_ptr, aes_blocks); unmap_sysmem(iv_ptr); unmap_sysmem(src_ptr); unmap_sysmem(dst_ptr); if (ret) { printf("Unable to do cbc operation: %d\n", ret); return CMD_RET_FAILURE; } return CMD_RET_SUCCESS; } /** * do_aes() - Handle the "aes" command-line command * @cmdtp: Command data struct pointer * @flag: Command flag * @argc: Command-line argument count * @argv: Array of command-line arguments * * Returns zero on success, CMD_RET_USAGE in case of misuse and negative * on error. */ static int do_aes(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]) { u32 key_len; if (argc < 2) return CMD_RET_USAGE; key_len = aes_get_key_len(argv[0]); if (!strncmp(argv[1], "enc", 3) || !strncmp(argv[1], "dec", 3)) return cmd_aes_cbc_simple(argc, argv, key_len); else if (CONFIG_IS_ENABLED(DM_AES) && !strncmp(argv[1], "get_slots", 9)) return cmd_aes_get_slots(); else if (CONFIG_IS_ENABLED(DM_AES) && !strncmp(argv[1], "set_key", 7)) return cmd_aes_set_key(argc, argv, key_len); else if (CONFIG_IS_ENABLED(DM_AES) && !strncmp(argv[1], "select_slot", 11)) return cmd_aes_select_slot(argc, argv, key_len); else if (CONFIG_IS_ENABLED(DM_AES) && !strncmp(argv[1], "ecb", 3)) return cmd_aes_ecb(argc, argv, key_len); else if (CONFIG_IS_ENABLED(DM_AES) && !strncmp(argv[1], "cbc", 3)) return cmd_aes_cbc(argc, argv, key_len); else return CMD_RET_USAGE; } /***************************************************/ U_BOOT_LONGHELP(aes, "[.128,.192,.256] enc key iv src dst len - CBC encrypt block of data $len bytes long\n" " at address $src using a key at address\n" " $key with initialization vector at address\n" " $iv. Store the result at address $dst.\n" " The $len size must be multiple of 16 bytes.\n" " The $key and $iv must be 16 bytes long.\n" "aes [.128,.192,.256] dec key iv src dst len - CBC decrypt block of data $len bytes long\n" " at address $src using a key at address\n" " $key with initialization vector at address\n" " $iv. Store the result at address $dst.\n" " The $len size must be multiple of 16 bytes.\n" " The $key and $iv must be 16 bytes long." #if CONFIG_IS_ENABLED(DM_AES) "\n" "aes get_slots - Gives number of available key slots\n" "aes [.128,.192,.256] set_key key slot - Load key at address $key into the slot $slot\n" "aes [.128,.192,.256] select_slot slot - Select current active key slot\n" "aes [.128,.192,.256] ecb enc src dst len - ECB encrypt block of data $len bytes long\n" " at address $src using a key at current\n" " slot. Store the result at address $dst.\n" " The $len size must be multiple of 16 bytes.\n" "aes [.128,.192,.256] ecb dec src dst len - ECB decrypt block of data $len bytes long\n" " at address $src using a key at current\n" " slot. Store the result at address $dst.\n" " The $len size must be multiple of 16 bytes.\n" "aes [.128,.192,.256] cbc enc iv src dst len - CBC encrypt block of data $len bytes long\n" " at address $src using a key at current\n" " slot with initialization vector at address\n" " $iv. Store the result at address $dst.\n" " The $len size must be multiple of 16 bytes.\n" " The $iv must be 16 bytes long.\n" "aes [.128,.192,.256] cbc dec iv src dst len - CBC decrypt block of data $len bytes long\n" " at address $src using a key at current\n" " slot with initialization vector at address\n" " $iv. Store the result at address $dst.\n" " The $len size must be multiple of 16 bytes.\n" " The $iv must be 16 bytes long." #endif ); U_BOOT_CMD( aes, 7, 1, do_aes, "AES 128/192/256 operations", aes_help_text ); |