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 */
blob_decap(u8 * key_mod,u8 * src,u8 * dst,u32 len)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 */
blob_encap(u8 * key_mod,u8 * src,u8 * dst,u32 len)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 */
do_blob(struct cmd_tbl * cmdtp,int flag,int argc,char * const argv[])56 static 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 = simple_strtoul(argv[2], NULL, 16);
74 dst_addr = simple_strtoul(argv[3], NULL, 16);
75 len = simple_strtoul(argv[4], NULL, 16);
76 key_addr = simple_strtoul(argv[5], NULL, 16);
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(CONFIG_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 /***************************************************/
102 static 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
120 U_BOOT_CMD(
121 blob, 6, 1, do_blob,
122 "Blob encapsulation/decryption",
123 blob_help_text
124 );
125