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cmd/blob.c
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d41ce506b Initial Release, ... |
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/* * * Command for encapsulating/decapsulating blob of memory. * * SPDX-License-Identifier: GPL-2.0+ */ #include <common.h> #include <command.h> #include <environment.h> #include <malloc.h> #include <asm/byteorder.h> #include <linux/compiler.h> #if defined(CONFIG_ARCH_MX6) || defined(CONFIG_ARCH_MX7) || \ defined(CONFIG_ARCH_MX7ULP) || defined(CONFIG_ARCH_IMX8M) #include <fsl_sec.h> #include <asm/arch/clock.h> #endif DECLARE_GLOBAL_DATA_PTR; /** * blob_decap() - Decapsulate the data as a blob * @key_mod: - Pointer to key modifier/key * @src: - Address of data to be decapsulated * @dst: - Address of data to be decapsulated * @len: - Size of data to be decapsulated * * Returns zero on success,and negative on error. */ __weak int blob_decap(u8 *key_mod, u8 *src, u8 *dst, u32 len) { return 0; } /** * blob_encap() - Encapsulate the data as a blob * @key_mod: - Pointer to key modifier/key * @src: - Address of data to be encapsulated * @dst: - Address of data to be encapsulated * @len: - Size of data to be encapsulated * * Returns zero on success,and negative on error. */ __weak int blob_encap(u8 *key_mod, u8 *src, u8 *dst, u32 len) { return 0; } /** * do_blob() - Handle the "blob" command-line command * @cmdtp: Command data struct pointer * @flag: Command flag * @argc: Command-line argument count * @argv: Array of command-line arguments * * Returns zero on success, CMD_RET_USAGE in case of misuse and negative * on error. */ static int do_blob(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[]) { ulong key_addr, src_addr, dst_addr, len; uint8_t *km_ptr, *src_ptr, *dst_ptr; int enc, ret = 0; if (argc != 6) return CMD_RET_USAGE; if (!strncmp(argv[1], "enc", 3)) enc = 1; else if (!strncmp(argv[1], "dec", 3)) enc = 0; else return CMD_RET_USAGE; src_addr = simple_strtoul(argv[2], NULL, 16); dst_addr = simple_strtoul(argv[3], NULL, 16); len = simple_strtoul(argv[4], NULL, 16); key_addr = simple_strtoul(argv[5], NULL, 16); km_ptr = (uint8_t *)(uintptr_t)key_addr; src_ptr = (uint8_t *)(uintptr_t)src_addr; dst_ptr = (uint8_t *)(uintptr_t)dst_addr; #if defined(CONFIG_ARCH_MX6) || defined(CONFIG_ARCH_MX7) || \ defined(CONFIG_ARCH_MX7ULP) || defined(CONFIG_ARCH_IMX8M) hab_caam_clock_enable(1); u32 out_jr_size = sec_in32(CONFIG_SYS_FSL_JR0_ADDR + FSL_CAAM_ORSR_JRa_OFFSET); if (out_jr_size != FSL_CAAM_MAX_JR_SIZE) sec_init(); #endif if (enc) ret = blob_encap(km_ptr, src_ptr, dst_ptr, len); else ret = blob_decap(km_ptr, src_ptr, dst_ptr, len); return ret; } /***************************************************/ static char blob_help_text[] = "enc src dst len km - Encapsulate and create blob of data " " $len bytes long at address $src and " " store the result at address $dst. " " $km is the address where the key " " modifier is stored. " " The modifier is required for generation " " /use as key for cryptographic operation. " " Key modifier should be 16 byte long. " "blob dec src dst len km - Decapsulate the blob of data at address " " $src and store result of $len byte at " " addr $dst. " " $km is the address where the key " " modifier is stored. " " The modifier is required for generation " " /use as key for cryptographic operation. " " Key modifier should be 16 byte long. "; U_BOOT_CMD( blob, 6, 1, do_blob, "Blob encapsulation/decryption", blob_help_text ); |