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cmd: aes: Add support for DM AES drivers

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This adds new aes subcommands to use interface provided by AES UCLASS which
can be used to expose HW AES engines.

Signed-off-by: Ion Agorria <ion@agorria.com>
Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
This commit is contained in:
Ion Agorria
2025-06-29 13:57:10 +03:00
committed by Tom Rini
parent a2e86dafd7
commit b01444aa14
1 changed files with 255 additions and 20 deletions
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275
cmd/aes.c
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@@ -1,8 +1,9 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2014 Marek Vasut <marex@denx.de>
* Copyright (C) 2025 Ion Agorria <ion@agorria.com>
*
* Command for en/de-crypting block of memory with AES-[128/192/256]-CBC cipher.
* Command for AES-[128/192/256] operations.
*/
#include <command.h>
@@ -12,6 +13,8 @@
#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)
{
@@ -25,29 +28,30 @@ u32 aes_get_key_len(char *command)
return key_len;
}
/**
* 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[])
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, key_len;
u32 aes_blocks;
int enc;
if (argc != 7)
return CMD_RET_USAGE;
key_len = aes_get_key_len(argv[0]);
if (!strncmp(argv[1], "enc", 3))
enc = 1;
else if (!strncmp(argv[1], "dec", 3))
@@ -84,26 +88,257 @@ static int do_aes(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
unmap_sysmem(src_ptr);
unmap_sysmem(dst_ptr);
return 0;
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 - Encrypt block of data $len bytes long\n"
"[.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 - Decrypt block of data $len 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.");
" 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 CBC encryption",
"AES 128/192/256 operations",
aes_help_text
);