u-boot/cmd/blob.c
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00

109 lines
3.2 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
*
* Command for encapsulating/decapsulating blob of memory.
*/
#include <common.h>
#include <command.h>
#include <environment.h>
#include <malloc.h>
#include <asm/byteorder.h>
#include <linux/compiler.h>
/**
* 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 (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
);