1// SPDX-License-Identifier: GPL-2.0+
2/*
3 *
4 * Command for encapsulating/decapsulating blob of memory.
5 */
6
7#include <common.h>
8#include <command.h>
9#include <malloc.h>
10#include <asm/byteorder.h>
11#include <linux/compiler.h>
12#if defined(CONFIG_ARCH_MX6) || defined(CONFIG_ARCH_MX7) || \
13	defined(CONFIG_ARCH_MX7ULP) || defined(CONFIG_ARCH_IMX8M)
14#include <fsl_sec.h>
15#include <asm/arch/clock.h>
16#endif
17
18/**
19 * blob_decap() - Decapsulate the data as a blob
20 * @key_mod:	- Pointer to key modifier/key
21 * @src:	- Address of data to be decapsulated
22 * @dst:	- Address of data to be decapsulated
23 * @len:	- Size of data to be decapsulated
24 *
25 * Returns zero on success,and negative on error.
26 */
27__weak int blob_decap(u8 *key_mod, u8 *src, u8 *dst, u32 len)
28{
29	return 0;
30}
31
32/**
33 * blob_encap() - Encapsulate the data as a blob
34 * @key_mod:	- Pointer to key modifier/key
35 * @src:	- Address of data to be encapsulated
36 * @dst:	- Address of data to be encapsulated
37 * @len:	- Size of data to be encapsulated
38 *
39 * Returns zero on success,and negative on error.
40 */
41__weak int blob_encap(u8 *key_mod, u8 *src, u8 *dst, u32 len)
42{
43	return 0;
44}
45
46/**
47 * do_blob() - Handle the "blob" command-line command
48 * @cmdtp:	Command data struct pointer
49 * @flag:	Command flag
50 * @argc:	Command-line argument count
51 * @argv:	Array of command-line arguments
52 *
53 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
54 * on error.
55 */
56static int do_blob(struct cmd_tbl *cmdtp, int flag, int argc,
57		   char *const argv[])
58{
59	ulong key_addr, src_addr, dst_addr, len;
60	uint8_t *km_ptr, *src_ptr, *dst_ptr;
61	int enc, ret = 0;
62
63	if (argc != 6)
64		return CMD_RET_USAGE;
65
66	if (!strncmp(argv[1], "enc", 3))
67		enc = 1;
68	else if (!strncmp(argv[1], "dec", 3))
69		enc = 0;
70	else
71		return CMD_RET_USAGE;
72
73	src_addr = hextoul(argv[2], NULL);
74	dst_addr = hextoul(argv[3], NULL);
75	len = hextoul(argv[4], NULL);
76	key_addr = hextoul(argv[5], NULL);
77
78	km_ptr = (uint8_t *)(uintptr_t)key_addr;
79	src_ptr = (uint8_t *)(uintptr_t)src_addr;
80	dst_ptr = (uint8_t *)(uintptr_t)dst_addr;
81
82#if defined(CONFIG_ARCH_MX6) || defined(CONFIG_ARCH_MX7) || \
83	defined(CONFIG_ARCH_MX7ULP) || defined(CONFIG_ARCH_IMX8M)
84
85	hab_caam_clock_enable(1);
86
87	u32 out_jr_size = sec_in32(CFG_SYS_FSL_JR0_ADDR +
88				   FSL_CAAM_ORSR_JRa_OFFSET);
89	if (out_jr_size != FSL_CAAM_MAX_JR_SIZE)
90		sec_init();
91#endif
92
93	if (enc)
94		ret = blob_encap(km_ptr, src_ptr, dst_ptr, len);
95	else
96		ret = blob_decap(km_ptr, src_ptr, dst_ptr, len);
97
98	return ret;
99}
100
101/***************************************************/
102static char blob_help_text[] =
103	"enc src dst len km - Encapsulate and create blob of data\n"
104	"                          $len bytes long at address $src and\n"
105	"                          store the result at address $dst.\n"
106	"                          $km is the address where the key\n"
107	"                          modifier is stored.\n"
108	"                          The modifier is required for generation\n"
109	"                          /use as key for cryptographic operation.\n"
110	"                          Key modifier should be 16 byte long.\n"
111	"blob dec src dst len km - Decapsulate the  blob of data at address\n"
112	"                          $src and store result of $len byte at\n"
113	"                          addr $dst.\n"
114	"                          $km is the address where the key\n"
115	"                          modifier is stored.\n"
116	"                          The modifier is required for generation\n"
117	"                          /use as key for cryptographic operation.\n"
118	"                          Key modifier should be 16 byte long.\n";
119
120U_BOOT_CMD(
121	blob, 6, 1, do_blob,
122	"Blob encapsulation/decryption",
123	blob_help_text
124);
125