1*83d290c5STom Rini // SPDX-License-Identifier: GPL-2.0+
22e192b24SSimon Glass /*
32e192b24SSimon Glass *
42e192b24SSimon Glass * Command for encapsulating/decapsulating blob of memory.
52e192b24SSimon Glass */
62e192b24SSimon Glass
72e192b24SSimon Glass #include <common.h>
82e192b24SSimon Glass #include <command.h>
92e192b24SSimon Glass #include <environment.h>
102e192b24SSimon Glass #include <malloc.h>
112e192b24SSimon Glass #include <asm/byteorder.h>
122e192b24SSimon Glass #include <linux/compiler.h>
132e192b24SSimon Glass
142e192b24SSimon Glass /**
152e192b24SSimon Glass * blob_decap() - Decapsulate the data as a blob
162e192b24SSimon Glass * @key_mod: - Pointer to key modifier/key
172e192b24SSimon Glass * @src: - Address of data to be decapsulated
182e192b24SSimon Glass * @dst: - Address of data to be decapsulated
192e192b24SSimon Glass * @len: - Size of data to be decapsulated
202e192b24SSimon Glass *
212e192b24SSimon Glass * Returns zero on success,and negative on error.
222e192b24SSimon Glass */
blob_decap(u8 * key_mod,u8 * src,u8 * dst,u32 len)232e192b24SSimon Glass __weak int blob_decap(u8 *key_mod, u8 *src, u8 *dst, u32 len)
242e192b24SSimon Glass {
252e192b24SSimon Glass return 0;
262e192b24SSimon Glass }
272e192b24SSimon Glass
282e192b24SSimon Glass /**
292e192b24SSimon Glass * blob_encap() - Encapsulate the data as a blob
302e192b24SSimon Glass * @key_mod: - Pointer to key modifier/key
312e192b24SSimon Glass * @src: - Address of data to be encapsulated
322e192b24SSimon Glass * @dst: - Address of data to be encapsulated
332e192b24SSimon Glass * @len: - Size of data to be encapsulated
342e192b24SSimon Glass *
352e192b24SSimon Glass * Returns zero on success,and negative on error.
362e192b24SSimon Glass */
blob_encap(u8 * key_mod,u8 * src,u8 * dst,u32 len)372e192b24SSimon Glass __weak int blob_encap(u8 *key_mod, u8 *src, u8 *dst, u32 len)
382e192b24SSimon Glass {
392e192b24SSimon Glass return 0;
402e192b24SSimon Glass }
412e192b24SSimon Glass
422e192b24SSimon Glass /**
432e192b24SSimon Glass * do_blob() - Handle the "blob" command-line command
442e192b24SSimon Glass * @cmdtp: Command data struct pointer
452e192b24SSimon Glass * @flag: Command flag
462e192b24SSimon Glass * @argc: Command-line argument count
472e192b24SSimon Glass * @argv: Array of command-line arguments
482e192b24SSimon Glass *
492e192b24SSimon Glass * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
502e192b24SSimon Glass * on error.
512e192b24SSimon Glass */
do_blob(cmd_tbl_t * cmdtp,int flag,int argc,char * const argv[])522e192b24SSimon Glass static int do_blob(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
532e192b24SSimon Glass {
547fe1d6a4SSumit Garg ulong key_addr, src_addr, dst_addr, len;
552e192b24SSimon Glass uint8_t *km_ptr, *src_ptr, *dst_ptr;
562e192b24SSimon Glass int enc, ret = 0;
572e192b24SSimon Glass
582e192b24SSimon Glass if (argc != 6)
592e192b24SSimon Glass return CMD_RET_USAGE;
602e192b24SSimon Glass
612e192b24SSimon Glass if (!strncmp(argv[1], "enc", 3))
622e192b24SSimon Glass enc = 1;
632e192b24SSimon Glass else if (!strncmp(argv[1], "dec", 3))
642e192b24SSimon Glass enc = 0;
652e192b24SSimon Glass else
662e192b24SSimon Glass return CMD_RET_USAGE;
672e192b24SSimon Glass
682e192b24SSimon Glass src_addr = simple_strtoul(argv[2], NULL, 16);
692e192b24SSimon Glass dst_addr = simple_strtoul(argv[3], NULL, 16);
702e192b24SSimon Glass len = simple_strtoul(argv[4], NULL, 16);
712e192b24SSimon Glass key_addr = simple_strtoul(argv[5], NULL, 16);
722e192b24SSimon Glass
732e192b24SSimon Glass km_ptr = (uint8_t *)(uintptr_t)key_addr;
742e192b24SSimon Glass src_ptr = (uint8_t *)(uintptr_t)src_addr;
752e192b24SSimon Glass dst_ptr = (uint8_t *)(uintptr_t)dst_addr;
762e192b24SSimon Glass
772e192b24SSimon Glass if (enc)
782e192b24SSimon Glass ret = blob_encap(km_ptr, src_ptr, dst_ptr, len);
792e192b24SSimon Glass else
802e192b24SSimon Glass ret = blob_decap(km_ptr, src_ptr, dst_ptr, len);
812e192b24SSimon Glass
822e192b24SSimon Glass return ret;
832e192b24SSimon Glass }
842e192b24SSimon Glass
852e192b24SSimon Glass /***************************************************/
862e192b24SSimon Glass static char blob_help_text[] =
872e192b24SSimon Glass "enc src dst len km - Encapsulate and create blob of data\n"
882e192b24SSimon Glass " $len bytes long at address $src and\n"
892e192b24SSimon Glass " store the result at address $dst.\n"
902e192b24SSimon Glass " $km is the address where the key\n"
912e192b24SSimon Glass " modifier is stored.\n"
922e192b24SSimon Glass " The modifier is required for generation\n"
932e192b24SSimon Glass " /use as key for cryptographic operation.\n"
942e192b24SSimon Glass " Key modifier should be 16 byte long.\n"
952e192b24SSimon Glass "blob dec src dst len km - Decapsulate the blob of data at address\n"
962e192b24SSimon Glass " $src and store result of $len byte at\n"
972e192b24SSimon Glass " addr $dst.\n"
982e192b24SSimon Glass " $km is the address where the key\n"
992e192b24SSimon Glass " modifier is stored.\n"
1002e192b24SSimon Glass " The modifier is required for generation\n"
1012e192b24SSimon Glass " /use as key for cryptographic operation.\n"
1022e192b24SSimon Glass " Key modifier should be 16 byte long.\n";
1032e192b24SSimon Glass
1042e192b24SSimon Glass U_BOOT_CMD(
1052e192b24SSimon Glass blob, 6, 1, do_blob,
1062e192b24SSimon Glass "Blob encapsulation/decryption",
1072e192b24SSimon Glass blob_help_text
1082e192b24SSimon Glass );
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