12e192b24SSimon Glass /* 22e192b24SSimon Glass * 32e192b24SSimon Glass * Command for encapsulating/decapsulating blob of memory. 42e192b24SSimon Glass * 52e192b24SSimon Glass * SPDX-License-Identifier: GPL-2.0+ 62e192b24SSimon Glass */ 72e192b24SSimon Glass 82e192b24SSimon Glass #include <common.h> 92e192b24SSimon Glass #include <command.h> 102e192b24SSimon Glass #include <environment.h> 112e192b24SSimon Glass #include <malloc.h> 122e192b24SSimon Glass #include <asm/byteorder.h> 132e192b24SSimon Glass #include <linux/compiler.h> 142e192b24SSimon Glass 152e192b24SSimon Glass DECLARE_GLOBAL_DATA_PTR; 162e192b24SSimon Glass 172e192b24SSimon Glass /** 182e192b24SSimon Glass * blob_decap() - Decapsulate the data as a blob 192e192b24SSimon Glass * @key_mod: - Pointer to key modifier/key 202e192b24SSimon Glass * @src: - Address of data to be decapsulated 212e192b24SSimon Glass * @dst: - Address of data to be decapsulated 222e192b24SSimon Glass * @len: - Size of data to be decapsulated 232e192b24SSimon Glass * 242e192b24SSimon Glass * Returns zero on success,and negative on error. 252e192b24SSimon Glass */ 262e192b24SSimon Glass __weak int blob_decap(u8 *key_mod, u8 *src, u8 *dst, u32 len) 272e192b24SSimon Glass { 282e192b24SSimon Glass return 0; 292e192b24SSimon Glass } 302e192b24SSimon Glass 312e192b24SSimon Glass /** 322e192b24SSimon Glass * blob_encap() - Encapsulate the data as a blob 332e192b24SSimon Glass * @key_mod: - Pointer to key modifier/key 342e192b24SSimon Glass * @src: - Address of data to be encapsulated 352e192b24SSimon Glass * @dst: - Address of data to be encapsulated 362e192b24SSimon Glass * @len: - Size of data to be encapsulated 372e192b24SSimon Glass * 382e192b24SSimon Glass * Returns zero on success,and negative on error. 392e192b24SSimon Glass */ 402e192b24SSimon Glass __weak int blob_encap(u8 *key_mod, u8 *src, u8 *dst, u32 len) 412e192b24SSimon Glass { 422e192b24SSimon Glass return 0; 432e192b24SSimon Glass } 442e192b24SSimon Glass 452e192b24SSimon Glass /** 462e192b24SSimon Glass * do_blob() - Handle the "blob" command-line command 472e192b24SSimon Glass * @cmdtp: Command data struct pointer 482e192b24SSimon Glass * @flag: Command flag 492e192b24SSimon Glass * @argc: Command-line argument count 502e192b24SSimon Glass * @argv: Array of command-line arguments 512e192b24SSimon Glass * 522e192b24SSimon Glass * Returns zero on success, CMD_RET_USAGE in case of misuse and negative 532e192b24SSimon Glass * on error. 542e192b24SSimon Glass */ 552e192b24SSimon Glass static int do_blob(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[]) 562e192b24SSimon Glass { 57*7fe1d6a4SSumit Garg ulong key_addr, src_addr, dst_addr, len; 582e192b24SSimon Glass uint8_t *km_ptr, *src_ptr, *dst_ptr; 592e192b24SSimon Glass int enc, ret = 0; 602e192b24SSimon Glass 612e192b24SSimon Glass if (argc != 6) 622e192b24SSimon Glass return CMD_RET_USAGE; 632e192b24SSimon Glass 642e192b24SSimon Glass if (!strncmp(argv[1], "enc", 3)) 652e192b24SSimon Glass enc = 1; 662e192b24SSimon Glass else if (!strncmp(argv[1], "dec", 3)) 672e192b24SSimon Glass enc = 0; 682e192b24SSimon Glass else 692e192b24SSimon Glass return CMD_RET_USAGE; 702e192b24SSimon Glass 712e192b24SSimon Glass src_addr = simple_strtoul(argv[2], NULL, 16); 722e192b24SSimon Glass dst_addr = simple_strtoul(argv[3], NULL, 16); 732e192b24SSimon Glass len = simple_strtoul(argv[4], NULL, 16); 742e192b24SSimon Glass key_addr = simple_strtoul(argv[5], NULL, 16); 752e192b24SSimon Glass 762e192b24SSimon Glass km_ptr = (uint8_t *)(uintptr_t)key_addr; 772e192b24SSimon Glass src_ptr = (uint8_t *)(uintptr_t)src_addr; 782e192b24SSimon Glass dst_ptr = (uint8_t *)(uintptr_t)dst_addr; 792e192b24SSimon Glass 802e192b24SSimon Glass if (enc) 812e192b24SSimon Glass ret = blob_encap(km_ptr, src_ptr, dst_ptr, len); 822e192b24SSimon Glass else 832e192b24SSimon Glass ret = blob_decap(km_ptr, src_ptr, dst_ptr, len); 842e192b24SSimon Glass 852e192b24SSimon Glass return ret; 862e192b24SSimon Glass } 872e192b24SSimon Glass 882e192b24SSimon Glass /***************************************************/ 892e192b24SSimon Glass static char blob_help_text[] = 902e192b24SSimon Glass "enc src dst len km - Encapsulate and create blob of data\n" 912e192b24SSimon Glass " $len bytes long at address $src and\n" 922e192b24SSimon Glass " store the result at address $dst.\n" 932e192b24SSimon Glass " $km is the address where the key\n" 942e192b24SSimon Glass " modifier is stored.\n" 952e192b24SSimon Glass " The modifier is required for generation\n" 962e192b24SSimon Glass " /use as key for cryptographic operation.\n" 972e192b24SSimon Glass " Key modifier should be 16 byte long.\n" 982e192b24SSimon Glass "blob dec src dst len km - Decapsulate the blob of data at address\n" 992e192b24SSimon Glass " $src and store result of $len byte at\n" 1002e192b24SSimon Glass " addr $dst.\n" 1012e192b24SSimon Glass " $km is the address where the key\n" 1022e192b24SSimon Glass " modifier is stored.\n" 1032e192b24SSimon Glass " The modifier is required for generation\n" 1042e192b24SSimon Glass " /use as key for cryptographic operation.\n" 1052e192b24SSimon Glass " Key modifier should be 16 byte long.\n"; 1062e192b24SSimon Glass 1072e192b24SSimon Glass U_BOOT_CMD( 1082e192b24SSimon Glass blob, 6, 1, do_blob, 1092e192b24SSimon Glass "Blob encapsulation/decryption", 1102e192b24SSimon Glass blob_help_text 1112e192b24SSimon Glass ); 112