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https://github.com/AsahiLinux/u-boot
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bcc6c57452
Enable "optee_rpmb" command to write/read named persistent values created on RPMB by opening session with OPTEE AVB TA. This provides easy test for establishing a session with OPTEE TA and storage of persistent data in MMC RPMB. It includes following subcommands: optee_rpmb read_pvalue:read persistent values on rpmb via OPTEE AVB TA optee_rpmb write_pvalue:write persistent values on rpmb via OPTEE AVB TA Signed-off-by: Ruchika Gupta <ruchika.gupta@nxp.com> [Rebased] Signed-off-by: Priyanka Jain <priyanka.jain@nxp.com>
272 lines
5.5 KiB
C
272 lines
5.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright 2020 NXP
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*/
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#include <command.h>
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#include <common.h>
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#include <env.h>
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#include <errno.h>
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#include <image.h>
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#include <malloc.h>
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#include <mmc.h>
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#include <tee.h>
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#include <tee/optee_ta_avb.h>
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static struct udevice *tee;
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static u32 session;
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static int avb_ta_open_session(void)
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{
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const struct tee_optee_ta_uuid uuid = TA_AVB_UUID;
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struct tee_open_session_arg arg;
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int rc;
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tee = tee_find_device(tee, NULL, NULL, NULL);
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if (!tee)
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return -ENODEV;
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memset(&arg, 0, sizeof(arg));
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tee_optee_ta_uuid_to_octets(arg.uuid, &uuid);
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rc = tee_open_session(tee, &arg, 0, NULL);
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if (!rc)
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session = arg.session;
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return 0;
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}
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static int invoke_func(u32 func, ulong num_param, struct tee_param *param)
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{
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struct tee_invoke_arg arg;
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if (!tee)
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if (avb_ta_open_session())
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return -ENODEV;
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memset(&arg, 0, sizeof(arg));
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arg.func = func;
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arg.session = session;
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if (tee_invoke_func(tee, &arg, num_param, param))
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return -EFAULT;
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switch (arg.ret) {
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case TEE_SUCCESS:
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return 0;
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case TEE_ERROR_OUT_OF_MEMORY:
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case TEE_ERROR_STORAGE_NO_SPACE:
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return -ENOSPC;
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case TEE_ERROR_ITEM_NOT_FOUND:
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return -EIO;
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case TEE_ERROR_TARGET_DEAD:
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/*
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* The TA has paniced, close the session to reload the TA
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* for the next request.
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*/
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tee_close_session(tee, session);
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tee = NULL;
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return -EIO;
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default:
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return -EIO;
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}
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}
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static int read_persistent_value(const char *name,
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size_t buffer_size,
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u8 *out_buffer,
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size_t *out_num_bytes_read)
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{
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int rc = 0;
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struct tee_shm *shm_name;
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struct tee_shm *shm_buf;
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struct tee_param param[2];
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size_t name_size = strlen(name) + 1;
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if (!tee)
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if (avb_ta_open_session())
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return -ENODEV;
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rc = tee_shm_alloc(tee, name_size,
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TEE_SHM_ALLOC, &shm_name);
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if (rc)
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return -ENOMEM;
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rc = tee_shm_alloc(tee, buffer_size,
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TEE_SHM_ALLOC, &shm_buf);
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if (rc) {
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rc = -ENOMEM;
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goto free_name;
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}
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memcpy(shm_name->addr, name, name_size);
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memset(param, 0, sizeof(param));
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param[0].attr = TEE_PARAM_ATTR_TYPE_MEMREF_INPUT;
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param[0].u.memref.shm = shm_name;
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param[0].u.memref.size = name_size;
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param[1].attr = TEE_PARAM_ATTR_TYPE_MEMREF_INOUT;
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param[1].u.memref.shm = shm_buf;
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param[1].u.memref.size = buffer_size;
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rc = invoke_func(TA_AVB_CMD_READ_PERSIST_VALUE,
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2, param);
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if (rc)
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goto out;
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if (param[1].u.memref.size > buffer_size) {
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rc = -EINVAL;
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goto out;
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}
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*out_num_bytes_read = param[1].u.memref.size;
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memcpy(out_buffer, shm_buf->addr, *out_num_bytes_read);
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out:
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tee_shm_free(shm_buf);
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free_name:
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tee_shm_free(shm_name);
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return rc;
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}
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static int write_persistent_value(const char *name,
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size_t value_size,
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const u8 *value)
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{
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int rc = 0;
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struct tee_shm *shm_name;
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struct tee_shm *shm_buf;
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struct tee_param param[2];
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size_t name_size = strlen(name) + 1;
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if (!tee) {
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if (avb_ta_open_session())
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return -ENODEV;
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}
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if (!value_size)
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return -EINVAL;
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rc = tee_shm_alloc(tee, name_size,
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TEE_SHM_ALLOC, &shm_name);
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if (rc)
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return -ENOMEM;
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rc = tee_shm_alloc(tee, value_size,
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TEE_SHM_ALLOC, &shm_buf);
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if (rc) {
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rc = -ENOMEM;
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goto free_name;
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}
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memcpy(shm_name->addr, name, name_size);
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memcpy(shm_buf->addr, value, value_size);
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memset(param, 0, sizeof(param));
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param[0].attr = TEE_PARAM_ATTR_TYPE_MEMREF_INPUT;
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param[0].u.memref.shm = shm_name;
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param[0].u.memref.size = name_size;
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param[1].attr = TEE_PARAM_ATTR_TYPE_MEMREF_INPUT;
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param[1].u.memref.shm = shm_buf;
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param[1].u.memref.size = value_size;
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rc = invoke_func(TA_AVB_CMD_WRITE_PERSIST_VALUE,
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2, param);
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if (rc)
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goto out;
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out:
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tee_shm_free(shm_buf);
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free_name:
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tee_shm_free(shm_name);
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return rc;
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}
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int do_optee_rpmb_read(struct cmd_tbl *cmdtp, int flag, int argc,
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char * const argv[])
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{
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const char *name;
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size_t bytes;
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size_t bytes_read;
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void *buffer;
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char *endp;
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if (argc != 3)
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return CMD_RET_USAGE;
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name = argv[1];
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bytes = simple_strtoul(argv[2], &endp, 10);
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if (*endp && *endp != '\n')
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return CMD_RET_USAGE;
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buffer = malloc(bytes);
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if (!buffer)
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return CMD_RET_FAILURE;
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if (read_persistent_value(name, bytes, buffer, &bytes_read) == 0) {
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printf("Read %zu bytes, value = %s\n", bytes_read,
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(char *)buffer);
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free(buffer);
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return CMD_RET_SUCCESS;
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}
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printf("Failed to read persistent value\n");
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free(buffer);
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return CMD_RET_FAILURE;
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}
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int do_optee_rpmb_write(struct cmd_tbl *cmdtp, int flag, int argc,
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char * const argv[])
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{
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const char *name;
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const char *value;
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if (argc != 3)
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return CMD_RET_USAGE;
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name = argv[1];
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value = argv[2];
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if (write_persistent_value(name, strlen(value) + 1,
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(const uint8_t *)value) == 0) {
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printf("Wrote %zu bytes\n", strlen(value) + 1);
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return CMD_RET_SUCCESS;
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}
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printf("Failed to write persistent value\n");
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return CMD_RET_FAILURE;
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}
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static struct cmd_tbl cmd_optee_rpmb[] = {
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U_BOOT_CMD_MKENT(read_pvalue, 3, 0, do_optee_rpmb_read, "", ""),
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U_BOOT_CMD_MKENT(write_pvalue, 3, 0, do_optee_rpmb_write, "", ""),
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};
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static int do_optee_rpmb(struct cmd_tbl *cmdtp, int flag, int argc,
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char * const argv[])
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{
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struct cmd_tbl *cp;
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cp = find_cmd_tbl(argv[1], cmd_optee_rpmb, ARRAY_SIZE(cmd_optee_rpmb));
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argc--;
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argv++;
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if (!cp || argc > cp->maxargs)
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return CMD_RET_USAGE;
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if (flag == CMD_FLAG_REPEAT)
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return CMD_RET_FAILURE;
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return cp->cmd(cmdtp, flag, argc, argv);
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}
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U_BOOT_CMD (
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optee_rpmb, 29, 0, do_optee_rpmb,
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"Provides commands for testing secure storage on RPMB on OPTEE",
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"read_pvalue <name> <bytes> - read a persistent value <name>\n"
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"optee_rpmb write_pvalue <name> <value> - write a persistent value <name>\n"
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);
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