123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124 |
- // SPDX-License-Identifier: GPL-2.0+
- /*
- *
- * Command for encapsulating/decapsulating blob of memory.
- */
- #include <common.h>
- #include <command.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
- /**
- * 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(struct cmd_tbl *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 = hextoul(argv[2], NULL);
- dst_addr = hextoul(argv[3], NULL);
- len = hextoul(argv[4], NULL);
- key_addr = hextoul(argv[5], NULL);
- 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\n"
- " $len bytes long at address $src and\n"
- " store the result at address $dst.\n"
- " $km is the address where the key\n"
- " modifier is stored.\n"
- " The modifier is required for generation\n"
- " /use as key for cryptographic operation.\n"
- " Key modifier should be 16 byte long.\n"
- "blob dec src dst len km - Decapsulate the blob of data at address\n"
- " $src and store result of $len byte at\n"
- " addr $dst.\n"
- " $km is the address where the key\n"
- " modifier is stored.\n"
- " The modifier is required for generation\n"
- " /use as key for cryptographic operation.\n"
- " Key modifier should be 16 byte long.\n";
- U_BOOT_CMD(
- blob, 6, 1, do_blob,
- "Blob encapsulation/decryption",
- blob_help_text
- );
|