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- // SPDX-License-Identifier: GPL-2.0+
- /*
- * Copyright 2008-2015 Freescale Semiconductor, Inc.
- *
- * Command for encapsulating DEK blob
- */
- #include <common.h>
- #include <command.h>
- #include <log.h>
- #include <malloc.h>
- #include <asm/byteorder.h>
- #include <linux/compiler.h>
- #include <fsl_sec.h>
- #include <asm/arch/clock.h>
- #include <mapmem.h>
- #include <tee.h>
- #ifdef CONFIG_IMX_SECO_DEK_ENCAP
- #include <asm/arch/sci/sci.h>
- #include <asm/arch/image.h>
- #endif
- #include <cpu_func.h>
- /**
- * blob_dek() - Encapsulate the DEK as a blob using CAM's Key
- * @src: - Address of data to be encapsulated
- * @dst: - Desination address of encapsulated data
- * @len: - Size of data to be encapsulated
- *
- * Returns zero on success,and negative on error.
- */
- #ifdef CONFIG_IMX_CAAM_DEK_ENCAP
- static int blob_encap_dek(u32 src_addr, u32 dst_addr, u32 len)
- {
- u8 *src_ptr, *dst_ptr;
- src_ptr = map_sysmem(src_addr, len / 8);
- dst_ptr = map_sysmem(dst_addr, BLOB_SIZE(len / 8));
- hab_caam_clock_enable(1);
- u32 out_jr_size = sec_in32(CONFIG_SYS_FSL_JR0_ADDR +
- FSL_CAAM_ORSR_JRa_OFFSET);
- if (out_jr_size != FSL_CAAM_MAX_JR_SIZE)
- sec_init();
- if (!((len == 128) | (len == 192) | (len == 256))) {
- debug("Invalid DEK size. Valid sizes are 128, 192 and 256b\n");
- return -1;
- }
- len /= 8;
- return blob_dek(src_ptr, dst_ptr, len);
- }
- #endif /* CONFIG_IMX_CAAM_DEK_ENCAP */
- #ifdef CONFIG_IMX_OPTEE_DEK_ENCAP
- #define PTA_DEK_BLOB_PTA_UUID {0xef477737, 0x0db1, 0x4a9d, \
- {0x84, 0x37, 0xf2, 0xf5, 0x35, 0xc0, 0xbd, 0x92} }
- #define OPTEE_BLOB_HDR_SIZE 8
- static int blob_encap_dek(u32 src_addr, u32 dst_addr, u32 len)
- {
- struct udevice *dev = NULL;
- struct tee_shm *shm_input, *shm_output;
- struct tee_open_session_arg arg = {0};
- struct tee_invoke_arg arg_func = {0};
- const struct tee_optee_ta_uuid uuid = PTA_DEK_BLOB_PTA_UUID;
- struct tee_param param[4] = {0};
- int ret;
- /* Get tee device */
- dev = tee_find_device(NULL, NULL, NULL, NULL);
- if (!dev) {
- printf("Cannot get OP-TEE device\n");
- return -1;
- }
- /* Set TA UUID */
- tee_optee_ta_uuid_to_octets(arg.uuid, &uuid);
- /* Open TA session */
- ret = tee_open_session(dev, &arg, 0, NULL);
- if (ret < 0) {
- printf("Cannot open session with PTA Blob 0x%X\n", ret);
- return -1;
- }
- /* Allocate shared input and output buffers for TA */
- ret = tee_shm_register(dev, (void *)(ulong)src_addr, len / 8, 0x0, &shm_input);
- if (ret < 0) {
- printf("Cannot register input shared memory 0x%X\n", ret);
- goto error;
- }
- ret = tee_shm_register(dev, (void *)(ulong)dst_addr,
- BLOB_SIZE(len / 8) + OPTEE_BLOB_HDR_SIZE,
- 0x0, &shm_output);
- if (ret < 0) {
- printf("Cannot register output shared memory 0x%X\n", ret);
- goto error;
- }
- param[0].u.memref.shm = shm_input;
- param[0].u.memref.size = shm_input->size;
- param[0].attr = TEE_PARAM_ATTR_TYPE_MEMREF_INPUT;
- param[1].u.memref.shm = shm_output;
- param[1].u.memref.size = shm_output->size;
- param[1].attr = TEE_PARAM_ATTR_TYPE_MEMREF_OUTPUT;
- param[2].attr = TEE_PARAM_ATTR_TYPE_NONE;
- param[3].attr = TEE_PARAM_ATTR_TYPE_NONE;
- arg_func.func = 0;
- arg_func.session = arg.session;
- /* Generate DEK blob */
- arg_func.session = arg.session;
- ret = tee_invoke_func(dev, &arg_func, 4, param);
- if (ret < 0)
- printf("Cannot generate Blob with PTA DEK Blob 0x%X\n", ret);
- error:
- /* Free shared memory */
- tee_shm_free(shm_input);
- tee_shm_free(shm_output);
- /* Close session */
- ret = tee_close_session(dev, arg.session);
- if (ret < 0)
- printf("Cannot close session with PTA DEK Blob 0x%X\n", ret);
- return ret;
- }
- #endif /* CONFIG_IMX_OPTEE_DEK_ENCAP */
- #ifdef CONFIG_IMX_SECO_DEK_ENCAP
- #define DEK_BLOB_KEY_ID 0x0
- #define AHAB_PRIVATE_KEY 0x81
- #define AHAB_VERSION 0x00
- #define AHAB_MODE_CBC 0x67
- #define AHAB_ALG_AES 0x55
- #define AHAB_128_AES_KEY 0x10
- #define AHAB_192_AES_KEY 0x18
- #define AHAB_256_AES_KEY 0x20
- #define AHAB_FLAG_KEK 0x80
- #define AHAB_DEK_BLOB 0x01
- #define DEK_BLOB_HDR_SIZE 8
- #define SECO_PT 2U
- static int blob_encap_dek(u32 src_addr, u32 dst_addr, u32 len)
- {
- sc_err_t err;
- sc_rm_mr_t mr_input, mr_output;
- struct generate_key_blob_hdr hdr;
- u8 in_size, out_size;
- u8 *src_ptr, *dst_ptr;
- int ret = 0;
- int i;
- /* Set sizes */
- in_size = sizeof(struct generate_key_blob_hdr) + len / 8;
- out_size = BLOB_SIZE(len / 8) + DEK_BLOB_HDR_SIZE;
- /* Get src and dst virtual addresses */
- src_ptr = map_sysmem(src_addr, in_size);
- dst_ptr = map_sysmem(dst_addr, out_size);
- /* Check addr input */
- if (!(src_ptr && dst_ptr)) {
- debug("src_addr or dst_addr invalid\n");
- return -1;
- }
- /* Build key header */
- hdr.version = AHAB_VERSION;
- hdr.length_lsb = sizeof(struct generate_key_blob_hdr) + len / 8;
- hdr.length_msb = 0x00;
- hdr.tag = AHAB_PRIVATE_KEY;
- hdr.flags = AHAB_DEK_BLOB;
- hdr.algorithm = AHAB_ALG_AES;
- hdr.mode = AHAB_MODE_CBC;
- switch (len) {
- case 128:
- hdr.size = AHAB_128_AES_KEY;
- break;
- case 192:
- hdr.size = AHAB_192_AES_KEY;
- break;
- case 256:
- hdr.size = AHAB_256_AES_KEY;
- break;
- default:
- /* Not supported */
- debug("Invalid DEK size. Valid sizes are 128, 192 and 256b\n");
- return -1;
- }
- /* Build input message */
- memmove((void *)(src_ptr + sizeof(struct generate_key_blob_hdr)),
- (void *)src_ptr, len / 8);
- memcpy((void *)src_ptr, (void *)&hdr,
- sizeof(struct generate_key_blob_hdr));
- /* Flush the cache before triggering the CAAM DMA */
- flush_dcache_range(src_addr, src_addr + in_size);
- /* Find input memory region */
- err = sc_rm_find_memreg((-1), &mr_input, src_addr & ~(CONFIG_SYS_CACHELINE_SIZE - 1),
- ALIGN(src_addr + in_size, CONFIG_SYS_CACHELINE_SIZE));
- if (err) {
- printf("Error: find memory region 0x%X\n", src_addr);
- return -ENOMEM;
- }
- /* Find output memory region */
- err = sc_rm_find_memreg((-1), &mr_output, dst_addr & ~(CONFIG_SYS_CACHELINE_SIZE - 1),
- ALIGN(dst_addr + out_size, CONFIG_SYS_CACHELINE_SIZE));
- if (err) {
- printf("Error: find memory region 0x%X\n", dst_addr);
- return -ENOMEM;
- }
- /* Set memory region permissions for SECO */
- err = sc_rm_set_memreg_permissions(-1, mr_input, SECO_PT,
- SC_RM_PERM_FULL);
- if (err) {
- printf("Set permission failed for input memory region\n");
- ret = -EPERM;
- goto error;
- }
- err = sc_rm_set_memreg_permissions(-1, mr_output, SECO_PT,
- SC_RM_PERM_FULL);
- if (err) {
- printf("Set permission failed for output memory region\n");
- ret = -EPERM;
- goto error;
- }
- /* Flush output data before SECO operation */
- flush_dcache_range((ulong)dst_ptr, (ulong)(dst_ptr +
- roundup(out_size, ARCH_DMA_MINALIGN)));
- /* Generate DEK blob */
- err = sc_seco_gen_key_blob((-1), 0x0, src_addr, dst_addr, out_size);
- if (err) {
- ret = -EPERM;
- goto error;
- }
- /* Invalidate output buffer */
- invalidate_dcache_range((ulong)dst_ptr, (ulong)(dst_ptr +
- roundup(out_size, ARCH_DMA_MINALIGN)));
- printf("DEK Blob\n");
- for (i = 0; i < DEK_BLOB_HDR_SIZE + BLOB_SIZE(len / 8); i++)
- printf("%02X", dst_ptr[i]);
- printf("\n");
- error:
- /* Remove memory region permission to SECO */
- err = sc_rm_set_memreg_permissions(-1, mr_input, SECO_PT,
- SC_RM_PERM_NONE);
- if (err) {
- printf("Error: remove permission failed for input\n");
- ret = -EPERM;
- }
- err = sc_rm_set_memreg_permissions(-1, mr_output, SECO_PT,
- SC_RM_PERM_NONE);
- if (err) {
- printf("Error: remove permission failed for output\n");
- ret = -EPERM;
- }
- return ret;
- }
- #endif /* CONFIG_IMX_SECO_DEK_ENCAP */
- /**
- * do_dek_blob() - Handle the "dek_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_dek_blob(struct cmd_tbl *cmdtp, int flag, int argc,
- char *const argv[])
- {
- uint32_t src_addr, dst_addr, len;
- if (argc != 4)
- return CMD_RET_USAGE;
- src_addr = hextoul(argv[1], NULL);
- dst_addr = hextoul(argv[2], NULL);
- len = dectoul(argv[3], NULL);
- return blob_encap_dek(src_addr, dst_addr, len);
- }
- /***************************************************/
- static char dek_blob_help_text[] =
- "src dst len - Encapsulate and create blob of data\n"
- " $len bits long at address $src and\n"
- " store the result at address $dst.\n";
- U_BOOT_CMD(
- dek_blob, 4, 1, do_dek_blob,
- "Data Encryption Key blob encapsulation",
- dek_blob_help_text
- );
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