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Diffstat (limited to 'cmd/aes.c')
| -rw-r--r-- | cmd/aes.c | 344 |
1 files changed, 344 insertions, 0 deletions
diff --git a/cmd/aes.c b/cmd/aes.c new file mode 100644 index 00000000000..3fd83013ffe --- /dev/null +++ b/cmd/aes.c @@ -0,0 +1,344 @@ +// 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 +); |