1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
|
/*
*
* 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 *)(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
);
|
