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/*
* Copyright 2021 NXP
*
* SPDX-License-Identifier: BSD-3-Clause
*
*/
#include <errno.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "caam.h"
#include <common/debug.h>
#include "jobdesc.h"
#include "sec_hw_specific.h"
/* Callback function after Instantiation decsriptor is submitted to SEC
*/
static void blob_done(uint32_t *desc, uint32_t status, void *arg,
void *job_ring)
{
INFO("Blob Desc SUCCESS with status %x\n", status);
}
/* @brief Submit descriptor to create blob
* @retval 0 on success
* @retval -1 on error
*/
int get_hw_unq_key_blob_hw(uint8_t *hw_key, int size)
{
int ret = 0;
int i = 0;
uint32_t key_sz = KEY_IDNFR_SZ_BYTES;
uint8_t key_data[KEY_IDNFR_SZ_BYTES];
uint8_t in_data[16];
uint8_t out_data[16 + KEY_BLOB_SIZE + MAC_SIZE];
struct job_descriptor desc __aligned(CACHE_WRITEBACK_GRANULE);
struct job_descriptor *jobdesc = &desc;
uint32_t in_sz = 16U;
/* Output blob will have 32 bytes key blob in beginning and
* 16 byte HMAC identifier at end of data blob
*/
uint32_t out_sz = in_sz + KEY_BLOB_SIZE + MAC_SIZE;
uint32_t operation = CMD_OPERATION | OP_TYPE_ENCAP_PROTOCOL |
OP_PCLID_BLOB | BLOB_PROTO_INFO;
memset(key_data, 0xff, KEY_IDNFR_SZ_BYTES);
memset(in_data, 0x00, in_sz);
memset(out_data, 0x00, in_sz);
jobdesc->arg = NULL;
jobdesc->callback = blob_done;
INFO("\nGenerating Master Key Verification Blob.\n");
/* Create the hw_rng descriptor */
ret = cnstr_hw_encap_blob_jobdesc(jobdesc->desc, key_data, key_sz,
CLASS_2, in_data, in_sz, out_data,
out_sz, operation);
/* Finally, generate the blob. */
ret = run_descriptor_jr(jobdesc);
if (ret != 0) {
ERROR("Error in running hw unq key blob descriptor\n");
return -1;
}
/* Copying alternate bytes of the Master Key Verification Blob.
*/
for (i = 0; i < size; i++) {
hw_key[i] = out_data[2 * i];
}
return ret;
}
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