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/**
@page PKA_ECDSA_Sign ECDSA signature example
@verbatim
******************************************************************************
* @file PKA/PKA_ECDSA_Sign/readme.txt
* @author MCD Application Team
* @brief Description of the ECDSA signature example
******************************************************************************
*
* Copyright (c) 2019-2021 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
@endverbatim
@par Example Description
How to compute a signed message regarding the Elliptic curve digital signature algorithm
(ECDSA).
For this example, a test vector have been extracted from National Institute of Standards and Technology (NIST)
- Cryptographic Algorithm Validation Program (CAVP) in order to demonstrate the usage of the hal.
This reference files can be found under:
"http://csrc.nist.gov/groups/STM/cavp/documents/dss/186-3ecdsatestvectors.zip (SigGen.txt)"
This test vector has been chosen to demonstrate how to sign a message. The inputs and outputs definitions are included
in SigGen.c. The output signature is composed of two parts called "R" and "S". You can refer to this file for more information.
The selected curve for this example is P-256 (ECDSA-256) published by NIST in
Federal Information Processing Standards Publication FIPS PUB 186-4. The description
of this curve is present in file Src/prime256v1.c.
In case of success, the LED2 (GREEN) is ON.
In case of any error, the LED2 (GREEN) is toggling slowly.
@note Care must be taken when using HAL_Delay(), this function provides accurate delay (in milliseconds)
based on variable incremented in SysTick ISR. This implies that if HAL_Delay() is called from
a peripheral ISR process, then the SysTick interrupt must have higher priority (numerically lower)
than the peripheral interrupt. Otherwise the caller ISR process will be blocked.
To change the SysTick interrupt priority you have to use HAL_NVIC_SetPriority() function.
@note The application needs to ensure that the SysTick time base is always set to 1 millisecond
to have correct HAL operation.
@par Keywords
Security, PKA, NIST, CAVP, ECDSA verification
@par Directory contents
- PKA/PKA_ECDSA_Sign/Inc/stm32wbxx_hal_conf.h HAL configuration file
- PKA/PKA_ECDSA_Sign/Inc/stm32wbxx_it.h Interrupt handlers header file
- PKA/PKA_ECDSA_Sign/Inc/main.h Header for main.c module
- PKA/PKA_ECDSA_Sign/Src/stm32wbxx_it.c Interrupt handlers
- PKA/PKA_ECDSA_Sign/Src/main.c Main program
- PKA/PKA_ECDSA_Sign/Src/stm32wbxx_hal_msp.c HAL MSP module
- PKA/PKA_ECDSA_Sign/Src/system_stm32wbxx.c STM32WBxx system source file
- PKA/PKA_ECDSA_Sign/Src/prime256v1.c Description of P-256 (ECDSA-256)
- PKA/PKA_ECDSA_Sign/Inc/prime256v1.h Header for prime256v1.c
- PKA/PKA_ECDSA_Sign/Src/SigGen.c Reflect the content of the test vector from SigGen.txt
- PKA/PKA_ECDSA_Sign/Src/SigGen.txt Extract from NIST CAVP
- PKA/PKA_ECDSA_Sign/Inc/SigGen.h Header of SigGen.c
@par Hardware and Software environment
- This example runs on STM32WB15CCUx devices.
- This example has been tested with an STMicroelectronics NUCLEO-WB15CC
board and can be easily tailored to any other supported device
and development board.
@par How to use it ?
In order to make the program work, you must do the following:
- Open your preferred toolchain
- Rebuild all files and load your image into target memory
- Run the example
* <h3><center>© COPYRIGHT STMicroelectronics</center></h3>
*/
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