mimxrt1020_crypto_trng.c
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1 /**
2  * @file mimxrt1020_crypto_trng.c
3  * @brief i.MX RT1020 true random number generator
4  *
5  * @section License
6  *
7  * SPDX-License-Identifier: GPL-2.0-or-later
8  *
9  * Copyright (C) 2010-2024 Oryx Embedded SARL. All rights reserved.
10  *
11  * This file is part of CycloneCRYPTO Open.
12  *
13  * This program is free software; you can redistribute it and/or
14  * modify it under the terms of the GNU General Public License
15  * as published by the Free Software Foundation; either version 2
16  * of the License, or (at your option) any later version.
17  *
18  * This program is distributed in the hope that it will be useful,
19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21  * GNU General Public License for more details.
22  *
23  * You should have received a copy of the GNU General Public License
24  * along with this program; if not, write to the Free Software Foundation,
25  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
26  *
27  * @author Oryx Embedded SARL (www.oryx-embedded.com)
28  * @version 2.4.0
29  **/
30 
31 //Switch to the appropriate trace level
32 #define TRACE_LEVEL CRYPTO_TRACE_LEVEL
33 
34 //Dependencies
35 #include "fsl_device_registers.h"
36 #include "fsl_trng.h"
37 #include "core/crypto.h"
40 #include "debug.h"
41 
42 //Check crypto library configuration
43 #if (MIMXRT1020_CRYPTO_TRNG_SUPPORT == ENABLED)
44 
45 
46 /**
47  * @brief TRNG module initialization
48  * @return Error code
49  **/
50 
52 {
53  status_t status;
54  trng_config_t trngConfig;
55 
56  //Enable TRNG peripheral clock
57  CLOCK_EnableClock(kCLOCK_Trng);
58 
59  //Get default TRNG configuration
60  TRNG_GetDefaultConfig(&trngConfig);
61  //Initialize TRNG
62  status = TRNG_Init(TRNG, &trngConfig);
63 
64  //Return status code
65  return (status == kStatus_Success) ? NO_ERROR : ERROR_FAILURE;
66 }
67 
68 
69 /**
70  * @brief Get random data from the TRNG module
71  * @param[out] data Buffer where to store random data
72  * @param[in] length Number of random bytes to generate
73  **/
74 
76 {
77  status_t status;
78 
79  //Acquire exclusive access to the TRNG module
81 
82  //Generate random data
83  status = TRNG_GetRandomData(TRNG, data, length);
84 
85  //Release exclusive access to the TRNG module
87 
88  //Return status code
89  return (status == kStatus_Success) ? NO_ERROR : ERROR_FAILURE;
90 }
91 
92 #endif
General definitions for cryptographic algorithms.
Debugging facilities.
error_t
Error codes.
Definition: error.h:43
@ NO_ERROR
Success.
Definition: error.h:44
@ ERROR_FAILURE
Generic error code.
Definition: error.h:45
uint8_t data[]
Definition: ethernet.h:222
OsMutex mimxrt1020CryptoMutex
i.MX RT1020 hardware cryptographic accelerator
error_t trngGetRandomData(uint8_t *data, size_t length)
Get random data from the TRNG module.
error_t trngInit(void)
TRNG module initialization.
i.MX RT1020 true random number generator
void osAcquireMutex(OsMutex *mutex)
Acquire ownership of the specified mutex object.
void osReleaseMutex(OsMutex *mutex)
Release ownership of the specified mutex object.
uint8_t length
Definition: tcp.h:368