projects / people / ms / u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| 0200020b RC |
1 | /* |
| 2 | * Copyright 2008-2015 Freescale Semiconductor, Inc. | |
| 3 | * | |
| 4 | * SPDX-License-Identifier: GPL-2.0+ | |
| 5 | * | |
| 6 | * Command for encapsulating DEK blob | |
| 7 | */ | |
| 8 | ||
| 9 | #include <common.h> | |
| 10 | #include <command.h> | |
| 11 | #include <environment.h> | |
| 12 | #include <malloc.h> | |
| 13 | #include <asm/byteorder.h> | |
| 14 | #include <linux/compiler.h> | |
| 15 | #include <fsl_sec.h> | |
| 16 | #include <asm/arch/clock.h> | |
| 98a49e53 | 17 | #include <mapmem.h> |
| 0200020b RC |
18 | |
| 19 | DECLARE_GLOBAL_DATA_PTR; | |
| 20 | ||
| 21 | /** | |
| 22 | * blob_dek() - Encapsulate the DEK as a blob using CAM's Key | |
| 23 | * @src: - Address of data to be encapsulated | |
| 24 | * @dst: - Desination address of encapsulated data | |
| 25 | * @len: - Size of data to be encapsulated | |
| 26 | * | |
| 27 | * Returns zero on success,and negative on error. | |
| 28 | */ | |
| 29 | static int blob_encap_dek(const u8 *src, u8 *dst, u32 len) | |
| 30 | { | |
| 31 | int ret = 0; | |
| 32 | u32 jr_size = 4; | |
| 33 | ||
| 34 | u32 out_jr_size = sec_in32(CONFIG_SYS_FSL_JR0_ADDR + 0x102c); | |
| 35 | if (out_jr_size != jr_size) { | |
| 36 | hab_caam_clock_enable(1); | |
| 37 | sec_init(); | |
| 38 | } | |
| 39 | ||
| 40 | if (!((len == 128) | (len == 192) | (len == 256))) { | |
| 41 | debug("Invalid DEK size. Valid sizes are 128, 192 and 256b\n"); | |
| 42 | return -1; | |
| 43 | } | |
| 44 | ||
| 45 | len /= 8; | |
| 46 | ret = blob_dek(src, dst, len); | |
| 47 | ||
| 48 | return ret; | |
| 49 | } | |
| 50 | ||
| 51 | /** | |
| 52 | * do_dek_blob() - Handle the "dek_blob" command-line command | |
| 53 | * @cmdtp: Command data struct pointer | |
| 54 | * @flag: Command flag | |
| 55 | * @argc: Command-line argument count | |
| 56 | * @argv: Array of command-line arguments | |
| 57 | * | |
| 58 | * Returns zero on success, CMD_RET_USAGE in case of misuse and negative | |
| 59 | * on error. | |
| 60 | */ | |
| 61 | static int do_dek_blob(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[]) | |
| 62 | { | |
| 63 | uint32_t src_addr, dst_addr, len; | |
| 64 | uint8_t *src_ptr, *dst_ptr; | |
| 65 | int ret = 0; | |
| 66 | ||
| 67 | if (argc != 4) | |
| 68 | return CMD_RET_USAGE; | |
| 69 | ||
| 70 | src_addr = simple_strtoul(argv[1], NULL, 16); | |
| 71 | dst_addr = simple_strtoul(argv[2], NULL, 16); | |
| 72 | len = simple_strtoul(argv[3], NULL, 10); | |
| 73 | ||
| 74 | src_ptr = map_sysmem(src_addr, len/8); | |
| 75 | dst_ptr = map_sysmem(dst_addr, BLOB_SIZE(len/8)); | |
| 76 | ||
| 77 | ret = blob_encap_dek(src_ptr, dst_ptr, len); | |
| 78 | ||
| 79 | return ret; | |
| 80 | } | |
| 81 | ||
| 82 | /***************************************************/ | |
| 83 | static char dek_blob_help_text[] = | |
| 84 | "src dst len - Encapsulate and create blob of data\n" | |
| 85 | " $len bits long at address $src and\n" | |
| 86 | " store the result at address $dst.\n"; | |
| 87 | ||
| 88 | U_BOOT_CMD( | |
| 89 | dek_blob, 4, 1, do_dek_blob, | |
| 90 | "Data Encryption Key blob encapsulation", | |
| 91 | dek_blob_help_text | |
| 92 | ); |