aes: Allow non-zero initialization vector

[people/ms/u-boot.git] / cmd / aes.c

diff --git a/cmd/aes.c b/cmd/aes.c
index ee1ae13c06ece13827475c42fb79aaeeed023133..9d1a740beeadbb5b3861364bf0a8de7720d3edf6 100644 (file)
--- a/cmd/aes.c
+++ b/cmd/aes.c
@@ -28,13 +28,13 @@ DECLARE_GLOBAL_DATA_PTR;
  */
 static int do_aes(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
 {
-       uint32_t key_addr, src_addr, dst_addr, len;
-       uint8_t *key_ptr, *src_ptr, *dst_ptr;
+       uint32_t key_addr, iv_addr, src_addr, dst_addr, len;
+       uint8_t *key_ptr, *iv_ptr, *src_ptr, *dst_ptr;
        uint8_t key_exp[AES_EXPAND_KEY_LENGTH];
        uint32_t aes_blocks;
        int enc;
 
-       if (argc != 6)
+       if (argc != 7)
                return CMD_RET_USAGE;
 
        if (!strncmp(argv[1], "enc", 3))
@@ -45,11 +45,13 @@ static int do_aes(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
                return CMD_RET_USAGE;
 
        key_addr = simple_strtoul(argv[2], NULL, 16);
-       src_addr = simple_strtoul(argv[3], NULL, 16);
-       dst_addr = simple_strtoul(argv[4], NULL, 16);
-       len = simple_strtoul(argv[5], NULL, 16);
+       iv_addr = simple_strtoul(argv[3], NULL, 16);
+       src_addr = simple_strtoul(argv[4], NULL, 16);
+       dst_addr = simple_strtoul(argv[5], NULL, 16);
+       len = simple_strtoul(argv[6], NULL, 16);
 
        key_ptr = (uint8_t *)key_addr;
+       iv_ptr = (uint8_t *)iv_addr;
        src_ptr = (uint8_t *)src_addr;
        dst_ptr = (uint8_t *)dst_addr;
 
@@ -60,9 +62,11 @@ static int do_aes(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
        aes_blocks = DIV_ROUND_UP(len, AES_KEY_LENGTH);
 
        if (enc)
-               aes_cbc_encrypt_blocks(key_exp, src_ptr, dst_ptr, aes_blocks);
+               aes_cbc_encrypt_blocks(key_exp, iv_ptr, src_ptr, dst_ptr,
+                                      aes_blocks);
        else
-               aes_cbc_decrypt_blocks(key_exp, src_ptr, dst_ptr, aes_blocks);
+               aes_cbc_decrypt_blocks(key_exp, iv_ptr, src_ptr, dst_ptr,
+                                      aes_blocks);
 
        return 0;
 }
@@ -70,20 +74,22 @@ static int do_aes(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
 /***************************************************/
 #ifdef CONFIG_SYS_LONGHELP
 static char aes_help_text[] =
-       "enc key src dst len - Encrypt block of data $len bytes long\n"
-       "                          at address $src using a key at address\n"
-       "                          $key and store the result at address\n"
-       "                          $dst. The $len size must be multiple of\n"
-       "                          16 bytes and $key must be 16 bytes long.\n"
-       "aes dec key src dst len - Decrypt block of data $len bytes long\n"
-       "                          at address $src using a key at address\n"
-       "                          $key and store the result at address\n"
-       "                          $dst. The $len size must be multiple of\n"
-       "                          16 bytes and $key must be 16 bytes long.";
+       "enc key iv src dst len - 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 dec key iv src dst len - 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.";
 #endif
 
 U_BOOT_CMD(
-       aes, 6, 1, do_aes,
+       aes, 7, 1, do_aes,
        "AES 128 CBC encryption",
        aes_help_text
 );