1*2e192b24SSimon Glass /* 2*2e192b24SSimon Glass * 3*2e192b24SSimon Glass * Command for encapsulating/decapsulating blob of memory. 4*2e192b24SSimon Glass * 5*2e192b24SSimon Glass * SPDX-License-Identifier: GPL-2.0+ 6*2e192b24SSimon Glass */ 7*2e192b24SSimon Glass 8*2e192b24SSimon Glass #include <common.h> 9*2e192b24SSimon Glass #include <command.h> 10*2e192b24SSimon Glass #include <environment.h> 11*2e192b24SSimon Glass #include <malloc.h> 12*2e192b24SSimon Glass #include <asm/byteorder.h> 13*2e192b24SSimon Glass #include <linux/compiler.h> 14*2e192b24SSimon Glass 15*2e192b24SSimon Glass DECLARE_GLOBAL_DATA_PTR; 16*2e192b24SSimon Glass 17*2e192b24SSimon Glass /** 18*2e192b24SSimon Glass * blob_decap() - Decapsulate the data as a blob 19*2e192b24SSimon Glass * @key_mod: - Pointer to key modifier/key 20*2e192b24SSimon Glass * @src: - Address of data to be decapsulated 21*2e192b24SSimon Glass * @dst: - Address of data to be decapsulated 22*2e192b24SSimon Glass * @len: - Size of data to be decapsulated 23*2e192b24SSimon Glass * 24*2e192b24SSimon Glass * Returns zero on success,and negative on error. 25*2e192b24SSimon Glass */ 26*2e192b24SSimon Glass __weak int blob_decap(u8 *key_mod, u8 *src, u8 *dst, u32 len) 27*2e192b24SSimon Glass { 28*2e192b24SSimon Glass return 0; 29*2e192b24SSimon Glass } 30*2e192b24SSimon Glass 31*2e192b24SSimon Glass /** 32*2e192b24SSimon Glass * blob_encap() - Encapsulate the data as a blob 33*2e192b24SSimon Glass * @key_mod: - Pointer to key modifier/key 34*2e192b24SSimon Glass * @src: - Address of data to be encapsulated 35*2e192b24SSimon Glass * @dst: - Address of data to be encapsulated 36*2e192b24SSimon Glass * @len: - Size of data to be encapsulated 37*2e192b24SSimon Glass * 38*2e192b24SSimon Glass * Returns zero on success,and negative on error. 39*2e192b24SSimon Glass */ 40*2e192b24SSimon Glass __weak int blob_encap(u8 *key_mod, u8 *src, u8 *dst, u32 len) 41*2e192b24SSimon Glass { 42*2e192b24SSimon Glass return 0; 43*2e192b24SSimon Glass } 44*2e192b24SSimon Glass 45*2e192b24SSimon Glass /** 46*2e192b24SSimon Glass * do_blob() - Handle the "blob" command-line command 47*2e192b24SSimon Glass * @cmdtp: Command data struct pointer 48*2e192b24SSimon Glass * @flag: Command flag 49*2e192b24SSimon Glass * @argc: Command-line argument count 50*2e192b24SSimon Glass * @argv: Array of command-line arguments 51*2e192b24SSimon Glass * 52*2e192b24SSimon Glass * Returns zero on success, CMD_RET_USAGE in case of misuse and negative 53*2e192b24SSimon Glass * on error. 54*2e192b24SSimon Glass */ 55*2e192b24SSimon Glass static int do_blob(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[]) 56*2e192b24SSimon Glass { 57*2e192b24SSimon Glass uint32_t key_addr, src_addr, dst_addr, len; 58*2e192b24SSimon Glass uint8_t *km_ptr, *src_ptr, *dst_ptr; 59*2e192b24SSimon Glass int enc, ret = 0; 60*2e192b24SSimon Glass 61*2e192b24SSimon Glass if (argc != 6) 62*2e192b24SSimon Glass return CMD_RET_USAGE; 63*2e192b24SSimon Glass 64*2e192b24SSimon Glass if (!strncmp(argv[1], "enc", 3)) 65*2e192b24SSimon Glass enc = 1; 66*2e192b24SSimon Glass else if (!strncmp(argv[1], "dec", 3)) 67*2e192b24SSimon Glass enc = 0; 68*2e192b24SSimon Glass else 69*2e192b24SSimon Glass return CMD_RET_USAGE; 70*2e192b24SSimon Glass 71*2e192b24SSimon Glass src_addr = simple_strtoul(argv[2], NULL, 16); 72*2e192b24SSimon Glass dst_addr = simple_strtoul(argv[3], NULL, 16); 73*2e192b24SSimon Glass len = simple_strtoul(argv[4], NULL, 16); 74*2e192b24SSimon Glass key_addr = simple_strtoul(argv[5], NULL, 16); 75*2e192b24SSimon Glass 76*2e192b24SSimon Glass km_ptr = (uint8_t *)(uintptr_t)key_addr; 77*2e192b24SSimon Glass src_ptr = (uint8_t *)(uintptr_t)src_addr; 78*2e192b24SSimon Glass dst_ptr = (uint8_t *)(uintptr_t)dst_addr; 79*2e192b24SSimon Glass 80*2e192b24SSimon Glass if (enc) 81*2e192b24SSimon Glass ret = blob_encap(km_ptr, src_ptr, dst_ptr, len); 82*2e192b24SSimon Glass else 83*2e192b24SSimon Glass ret = blob_decap(km_ptr, src_ptr, dst_ptr, len); 84*2e192b24SSimon Glass 85*2e192b24SSimon Glass return ret; 86*2e192b24SSimon Glass } 87*2e192b24SSimon Glass 88*2e192b24SSimon Glass /***************************************************/ 89*2e192b24SSimon Glass static char blob_help_text[] = 90*2e192b24SSimon Glass "enc src dst len km - Encapsulate and create blob of data\n" 91*2e192b24SSimon Glass " $len bytes long at address $src and\n" 92*2e192b24SSimon Glass " store the result at address $dst.\n" 93*2e192b24SSimon Glass " $km is the address where the key\n" 94*2e192b24SSimon Glass " modifier is stored.\n" 95*2e192b24SSimon Glass " The modifier is required for generation\n" 96*2e192b24SSimon Glass " /use as key for cryptographic operation.\n" 97*2e192b24SSimon Glass " Key modifier should be 16 byte long.\n" 98*2e192b24SSimon Glass "blob dec src dst len km - Decapsulate the blob of data at address\n" 99*2e192b24SSimon Glass " $src and store result of $len byte at\n" 100*2e192b24SSimon Glass " addr $dst.\n" 101*2e192b24SSimon Glass " $km is the address where the key\n" 102*2e192b24SSimon Glass " modifier is stored.\n" 103*2e192b24SSimon Glass " The modifier is required for generation\n" 104*2e192b24SSimon Glass " /use as key for cryptographic operation.\n" 105*2e192b24SSimon Glass " Key modifier should be 16 byte long.\n"; 106*2e192b24SSimon Glass 107*2e192b24SSimon Glass U_BOOT_CMD( 108*2e192b24SSimon Glass blob, 6, 1, do_blob, 109*2e192b24SSimon Glass "Blob encapsulation/decryption", 110*2e192b24SSimon Glass blob_help_text 111*2e192b24SSimon Glass ); 112