1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright 2008-2015 Freescale Semiconductor, Inc.
5 * Command for encapsulating DEK blob
13 #include <asm/byteorder.h>
14 #include <linux/compiler.h>
16 #include <asm/arch/clock.h>
19 #ifdef CONFIG_IMX_SECO_DEK_ENCAP
20 #include <asm/arch/sci/sci.h>
21 #include <asm/mach-imx/image.h>
26 * blob_dek() - Encapsulate the DEK as a blob using CAM's Key
27 * @src: - Address of data to be encapsulated
28 * @dst: - Desination address of encapsulated data
29 * @len: - Size of data to be encapsulated
31 * Returns zero on success,and negative on error.
33 #ifdef CONFIG_IMX_CAAM_DEK_ENCAP
34 static int blob_encap_dek(u32 src_addr, u32 dst_addr, u32 len)
36 u8 *src_ptr, *dst_ptr;
38 src_ptr = map_sysmem(src_addr, len / 8);
39 dst_ptr = map_sysmem(dst_addr, BLOB_SIZE(len / 8));
41 hab_caam_clock_enable(1);
43 u32 out_jr_size = sec_in32(CFG_SYS_FSL_JR0_ADDR +
44 FSL_CAAM_ORSR_JRa_OFFSET);
45 if (out_jr_size != FSL_CAAM_MAX_JR_SIZE)
48 if (!((len == 128) | (len == 192) | (len == 256))) {
49 debug("Invalid DEK size. Valid sizes are 128, 192 and 256b\n");
54 return blob_dek(src_ptr, dst_ptr, len);
56 #endif /* CONFIG_IMX_CAAM_DEK_ENCAP */
58 #ifdef CONFIG_IMX_OPTEE_DEK_ENCAP
60 #define PTA_DEK_BLOB_PTA_UUID {0xef477737, 0x0db1, 0x4a9d, \
61 {0x84, 0x37, 0xf2, 0xf5, 0x35, 0xc0, 0xbd, 0x92} }
63 #define OPTEE_BLOB_HDR_SIZE 8
65 static int blob_encap_dek(u32 src_addr, u32 dst_addr, u32 len)
67 struct udevice *dev = NULL;
68 struct tee_shm *shm_input, *shm_output;
69 struct tee_open_session_arg arg = {0};
70 struct tee_invoke_arg arg_func = {0};
71 const struct tee_optee_ta_uuid uuid = PTA_DEK_BLOB_PTA_UUID;
72 struct tee_param param[4] = {0};
76 dev = tee_find_device(NULL, NULL, NULL, NULL);
78 printf("Cannot get OP-TEE device\n");
83 tee_optee_ta_uuid_to_octets(arg.uuid, &uuid);
86 ret = tee_open_session(dev, &arg, 0, NULL);
88 printf("Cannot open session with PTA Blob 0x%X\n", ret);
92 /* Allocate shared input and output buffers for TA */
93 ret = tee_shm_register(dev, (void *)(ulong)src_addr, len / 8, 0x0, &shm_input);
95 printf("Cannot register input shared memory 0x%X\n", ret);
99 ret = tee_shm_register(dev, (void *)(ulong)dst_addr,
100 BLOB_SIZE(len / 8) + OPTEE_BLOB_HDR_SIZE,
103 printf("Cannot register output shared memory 0x%X\n", ret);
107 param[0].u.memref.shm = shm_input;
108 param[0].u.memref.size = shm_input->size;
109 param[0].attr = TEE_PARAM_ATTR_TYPE_MEMREF_INPUT;
110 param[1].u.memref.shm = shm_output;
111 param[1].u.memref.size = shm_output->size;
112 param[1].attr = TEE_PARAM_ATTR_TYPE_MEMREF_OUTPUT;
113 param[2].attr = TEE_PARAM_ATTR_TYPE_NONE;
114 param[3].attr = TEE_PARAM_ATTR_TYPE_NONE;
117 arg_func.session = arg.session;
119 /* Generate DEK blob */
120 arg_func.session = arg.session;
121 ret = tee_invoke_func(dev, &arg_func, 4, param);
123 printf("Cannot generate Blob with PTA DEK Blob 0x%X\n", ret);
126 /* Free shared memory */
127 tee_shm_free(shm_input);
128 tee_shm_free(shm_output);
131 ret = tee_close_session(dev, arg.session);
133 printf("Cannot close session with PTA DEK Blob 0x%X\n", ret);
137 #endif /* CONFIG_IMX_OPTEE_DEK_ENCAP */
138 #ifdef CONFIG_IMX_SECO_DEK_ENCAP
140 #define DEK_BLOB_KEY_ID 0x0
142 #define AHAB_PRIVATE_KEY 0x81
143 #define AHAB_VERSION 0x00
144 #define AHAB_MODE_CBC 0x67
145 #define AHAB_ALG_AES 0x55
146 #define AHAB_128_AES_KEY 0x10
147 #define AHAB_192_AES_KEY 0x18
148 #define AHAB_256_AES_KEY 0x20
149 #define AHAB_FLAG_KEK 0x80
150 #define AHAB_DEK_BLOB 0x01
152 #define DEK_BLOB_HDR_SIZE 8
155 static int blob_encap_dek(u32 src_addr, u32 dst_addr, u32 len)
158 sc_rm_mr_t mr_input, mr_output;
159 struct generate_key_blob_hdr hdr;
160 u8 in_size, out_size;
161 u8 *src_ptr, *dst_ptr;
166 in_size = sizeof(struct generate_key_blob_hdr) + len / 8;
167 out_size = BLOB_SIZE(len / 8) + DEK_BLOB_HDR_SIZE;
169 /* Get src and dst virtual addresses */
170 src_ptr = map_sysmem(src_addr, in_size);
171 dst_ptr = map_sysmem(dst_addr, out_size);
173 /* Check addr input */
174 if (!(src_ptr && dst_ptr)) {
175 debug("src_addr or dst_addr invalid\n");
179 /* Build key header */
180 hdr.version = AHAB_VERSION;
181 hdr.length_lsb = sizeof(struct generate_key_blob_hdr) + len / 8;
182 hdr.length_msb = 0x00;
183 hdr.tag = AHAB_PRIVATE_KEY;
184 hdr.flags = AHAB_DEK_BLOB;
185 hdr.algorithm = AHAB_ALG_AES;
186 hdr.mode = AHAB_MODE_CBC;
190 hdr.size = AHAB_128_AES_KEY;
193 hdr.size = AHAB_192_AES_KEY;
196 hdr.size = AHAB_256_AES_KEY;
200 debug("Invalid DEK size. Valid sizes are 128, 192 and 256b\n");
204 /* Build input message */
205 memmove((void *)(src_ptr + sizeof(struct generate_key_blob_hdr)),
206 (void *)src_ptr, len / 8);
207 memcpy((void *)src_ptr, (void *)&hdr,
208 sizeof(struct generate_key_blob_hdr));
210 /* Flush the cache before triggering the CAAM DMA */
211 flush_dcache_range(src_addr, src_addr + in_size);
213 /* Find input memory region */
214 err = sc_rm_find_memreg((-1), &mr_input, src_addr & ~(CONFIG_SYS_CACHELINE_SIZE - 1),
215 ALIGN(src_addr + in_size, CONFIG_SYS_CACHELINE_SIZE));
217 printf("Error: find memory region 0x%X\n", src_addr);
221 /* Find output memory region */
222 err = sc_rm_find_memreg((-1), &mr_output, dst_addr & ~(CONFIG_SYS_CACHELINE_SIZE - 1),
223 ALIGN(dst_addr + out_size, CONFIG_SYS_CACHELINE_SIZE));
225 printf("Error: find memory region 0x%X\n", dst_addr);
229 /* Set memory region permissions for SECO */
230 err = sc_rm_set_memreg_permissions(-1, mr_input, SECO_PT,
233 printf("Set permission failed for input memory region\n");
238 err = sc_rm_set_memreg_permissions(-1, mr_output, SECO_PT,
241 printf("Set permission failed for output memory region\n");
246 /* Flush output data before SECO operation */
247 flush_dcache_range((ulong)dst_ptr, (ulong)(dst_ptr +
248 roundup(out_size, ARCH_DMA_MINALIGN)));
250 /* Generate DEK blob */
251 err = sc_seco_gen_key_blob((-1), 0x0, src_addr, dst_addr, out_size);
257 /* Invalidate output buffer */
258 invalidate_dcache_range((ulong)dst_ptr, (ulong)(dst_ptr +
259 roundup(out_size, ARCH_DMA_MINALIGN)));
261 printf("DEK Blob\n");
262 for (i = 0; i < DEK_BLOB_HDR_SIZE + BLOB_SIZE(len / 8); i++)
263 printf("%02X", dst_ptr[i]);
267 /* Remove memory region permission to SECO */
268 err = sc_rm_set_memreg_permissions(-1, mr_input, SECO_PT,
271 printf("Error: remove permission failed for input\n");
275 err = sc_rm_set_memreg_permissions(-1, mr_output, SECO_PT,
278 printf("Error: remove permission failed for output\n");
284 #endif /* CONFIG_IMX_SECO_DEK_ENCAP */
287 * do_dek_blob() - Handle the "dek_blob" command-line command
288 * @cmdtp: Command data struct pointer
289 * @flag: Command flag
290 * @argc: Command-line argument count
291 * @argv: Array of command-line arguments
293 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
296 static int do_dek_blob(struct cmd_tbl *cmdtp, int flag, int argc,
299 uint32_t src_addr, dst_addr, len;
302 return CMD_RET_USAGE;
304 src_addr = hextoul(argv[1], NULL);
305 dst_addr = hextoul(argv[2], NULL);
306 len = dectoul(argv[3], NULL);
308 return blob_encap_dek(src_addr, dst_addr, len);
311 /***************************************************/
312 static char dek_blob_help_text[] =
313 "src dst len - Encapsulate and create blob of data\n"
314 " $len bits long at address $src and\n"
315 " store the result at address $dst.\n";
318 dek_blob, 4, 1, do_dek_blob,
319 "Data Encryption Key blob encapsulation",