Pankaj Gupta | 95c7eee | 2020-12-09 14:02:39 +0530 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2021 NXP |
| 3 | * |
| 4 | * SPDX-License-Identifier: BSD-3-Clause |
| 5 | * |
| 6 | */ |
| 7 | |
| 8 | #include <errno.h> |
| 9 | #include <stdbool.h> |
| 10 | #include <stdint.h> |
| 11 | #include <stdio.h> |
| 12 | #include <stdlib.h> |
| 13 | #include <string.h> |
| 14 | |
| 15 | #include "caam.h" |
| 16 | #include <common/debug.h> |
| 17 | #include "jobdesc.h" |
| 18 | #include "sec_hw_specific.h" |
| 19 | |
| 20 | |
| 21 | /* Callback function after Instantiation decsriptor is submitted to SEC |
| 22 | */ |
| 23 | static void blob_done(uint32_t *desc, uint32_t status, void *arg, |
| 24 | void *job_ring) |
| 25 | { |
| 26 | INFO("Blob Desc SUCCESS with status %x\n", status); |
| 27 | } |
| 28 | |
| 29 | /* @brief Submit descriptor to create blob |
| 30 | * @retval 0 on success |
| 31 | * @retval -1 on error |
| 32 | */ |
| 33 | int get_hw_unq_key_blob_hw(uint8_t *hw_key, int size) |
| 34 | { |
| 35 | int ret = 0; |
| 36 | int i = 0; |
| 37 | |
| 38 | uint32_t key_sz = KEY_IDNFR_SZ_BYTES; |
| 39 | uint8_t key_data[KEY_IDNFR_SZ_BYTES]; |
| 40 | uint8_t in_data[16]; |
| 41 | uint8_t out_data[16 + KEY_BLOB_SIZE + MAC_SIZE]; |
| 42 | struct job_descriptor desc __aligned(CACHE_WRITEBACK_GRANULE); |
| 43 | struct job_descriptor *jobdesc = &desc; |
| 44 | uint32_t in_sz = 16U; |
| 45 | |
| 46 | /* Output blob will have 32 bytes key blob in beginning and |
| 47 | * 16 byte HMAC identifier at end of data blob |
| 48 | */ |
| 49 | uint32_t out_sz = in_sz + KEY_BLOB_SIZE + MAC_SIZE; |
| 50 | |
| 51 | uint32_t operation = CMD_OPERATION | OP_TYPE_ENCAP_PROTOCOL | |
| 52 | OP_PCLID_BLOB | BLOB_PROTO_INFO; |
| 53 | |
| 54 | memset(key_data, 0xff, KEY_IDNFR_SZ_BYTES); |
| 55 | memset(in_data, 0x00, in_sz); |
| 56 | memset(out_data, 0x00, in_sz); |
| 57 | |
| 58 | jobdesc->arg = NULL; |
| 59 | jobdesc->callback = blob_done; |
| 60 | |
| 61 | INFO("\nGenerating Master Key Verification Blob.\n"); |
| 62 | |
| 63 | /* Create the hw_rng descriptor */ |
| 64 | ret = cnstr_hw_encap_blob_jobdesc(jobdesc->desc, key_data, key_sz, |
| 65 | CLASS_2, in_data, in_sz, out_data, |
| 66 | out_sz, operation); |
| 67 | |
| 68 | /* Finally, generate the blob. */ |
| 69 | ret = run_descriptor_jr(jobdesc); |
| 70 | if (ret != 0) { |
| 71 | ERROR("Error in running hw unq key blob descriptor\n"); |
| 72 | return -1; |
| 73 | } |
| 74 | /* Copying alternate bytes of the Master Key Verification Blob. |
| 75 | */ |
| 76 | for (i = 0; i < size; i++) { |
| 77 | hw_key[i] = out_data[2 * i]; |
| 78 | } |
| 79 | |
| 80 | return ret; |
| 81 | } |