f5b37f303f
Prepare v2018.01 - Move options to defconfig - Fix sd3.0 support (by DP) - Fix spi-nor support (by DP/Vipul) - Add SPI_GENERIC Kconfig option (by DP/Vipul) Signed-off-by: Michal Simek <michal.simek@xilinx.com>
109 lines
3.0 KiB
C
109 lines
3.0 KiB
C
/*
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* Copyright (C) 2014 Marek Vasut <marex@denx.de>
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*
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* Command for en/de-crypting block of memory with AES-128-CBC cipher.
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <command.h>
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#include <environment.h>
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#include <uboot_aes.h>
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#include <malloc.h>
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#include <asm/byteorder.h>
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#include <linux/compiler.h>
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DECLARE_GLOBAL_DATA_PTR;
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__weak int aes_decrypt_hw(u8 *key_ptr, u8 *src_ptr, u8 *dst_ptr, u32 len)
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{
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return 0;
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}
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/**
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* do_aes() - Handle the "aes" command-line command
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* @cmdtp: Command data struct pointer
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* @flag: Command flag
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* @argc: Command-line argument count
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* @argv: Array of command-line arguments
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*
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* Returns zero on success, CMD_RET_USAGE in case of misuse and negative
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* on error.
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*/
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static int do_aes(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
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{
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uint32_t key_addr, src_addr, dst_addr, len;
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uint8_t *key_ptr, *src_ptr, *dst_ptr;
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uint8_t key_exp[AES_EXPAND_KEY_LENGTH];
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uint32_t aes_blocks;
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int enc;
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bool use_hw = false;
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if (argc < 6 || argc > 7)
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return CMD_RET_USAGE;
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if (!strncmp(argv[1], "enc", 3))
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enc = 1;
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else if (!strncmp(argv[1], "dec", 3))
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enc = 0;
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else
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return CMD_RET_USAGE;
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key_addr = simple_strtoul(argv[2], NULL, 16);
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src_addr = simple_strtoul(argv[3], NULL, 16);
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dst_addr = simple_strtoul(argv[4], NULL, 16);
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len = simple_strtoul(argv[5], NULL, 16);
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if (argc == 7)
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if (!strncmp(argv[6], "hw", 2))
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use_hw = true;
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key_ptr = (uint8_t *)(uintptr_t)key_addr;
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src_ptr = (uint8_t *)(uintptr_t)src_addr;
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dst_ptr = (uint8_t *)(uintptr_t)dst_addr;
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if (use_hw) {
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if (!enc)
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aes_decrypt_hw(key_ptr, src_ptr, dst_ptr, len);
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} else {
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/* First we expand the key. */
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aes_expand_key(key_ptr, key_exp);
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/* Calculate the number of AES blocks to encrypt. */
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aes_blocks = DIV_ROUND_UP(len, AES_KEY_LENGTH);
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if (enc)
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aes_cbc_encrypt_blocks(key_exp, src_ptr, dst_ptr,
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aes_blocks);
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else
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aes_cbc_decrypt_blocks(key_exp, src_ptr, dst_ptr,
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aes_blocks);
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}
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return 0;
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}
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/***************************************************/
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#ifdef CONFIG_SYS_LONGHELP
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static char aes_help_text[] =
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"enc key src dst len - Encrypt block of data $len bytes long\n"
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" at address $src using a key at address\n"
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" $key and store the result at address\n"
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" $dst. The $len size must be multiple of\n"
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" 16 bytes and $key must be 16 bytes long.\n"
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"aes dec key src dst len [hw] - Decrypt block of data $len bytes\n"
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" long at address $src using a key at\n"
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" address $key and store the result at\n"
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" address $dst. The $len size must be\n"
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" multiple of 16 bytes and $key must be\n"
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" 16 bytes long. The optional hw flag\n"
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" specifies to used hardware engine if\n"
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" supports\n";
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#endif
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U_BOOT_CMD(
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aes, 7, 1, do_aes,
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"AES 128 CBC encryption",
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aes_help_text
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);
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