diff options
Diffstat (limited to 'common')
| -rw-r--r-- | common/Makefile | 2 | ||||
| -rw-r--r-- | common/cmd_blob.c | 109 |
2 files changed, 111 insertions, 0 deletions
diff --git a/common/Makefile b/common/Makefile index b19d379..c84b3bc 100644 --- a/common/Makefile +++ b/common/Makefile @@ -265,4 +265,6 @@ obj-y += aboot.o obj-y += fb_mmc.o endif +obj-$(CONFIG_CMD_BLOB) += cmd_blob.o + CFLAGS_env_embedded.o := -Wa,--no-warn -DENV_CRC=$(shell tools/envcrc 2>/dev/null) diff --git a/common/cmd_blob.c b/common/cmd_blob.c new file mode 100644 index 0000000..82ecaf0 --- /dev/null +++ b/common/cmd_blob.c @@ -0,0 +1,109 @@ +/* + * + * 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> + +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[]) +{ + uint32_t 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 *)key_addr; + src_ptr = (uint8_t *)src_addr; + dst_ptr = (uint8_t *)dst_addr; + + 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 16 byte key modifier\n" + " is also required for generation/use as\n" + " key for cryptographic operation. Key\n" + " 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 16 byte key modifier\n" + " is also required for generation/use as\n" + " key for cryptographic operation. Key\n" + " modifier should be 16 byte long.\n"; + +U_BOOT_CMD( + blob, 6, 1, do_blob, + "Blob encapsulation/decryption", + blob_help_text +); |