mcuxClHashModes_sha224_oneshot_example.c

mcuxClHashModes example application

mcuxClHashModes example application

/*--------------------------------------------------------------------------*/
/* Copyright 2022-2025 NXP                                                  */
/*                                                                          */
/* NXP Confidential and Proprietary. This software is owned or controlled   */
/* by NXP and may only be used strictly in accordance with the applicable   */
/* license terms.  By expressly accepting such terms or by downloading,     */
/* installing, activating and/or otherwise using the software, you are      */
/* agreeing that you have read, and that you agree to comply with and are   */
/* bound by, such license terms.  If you do not agree to be bound by the    */
/* applicable license terms, then you may not retain, install, activate or  */
/* otherwise use the software.                                              */
/*--------------------------------------------------------------------------*/

 
#include <mcuxClToolchain.h>
#include <mcuxClSession.h>          // Interface to the entire mcuxClSession component
#include <mcuxClHash.h>             // Interface to the entire mcuxClHash component
#include <mcuxClHashModes.h>
#include <mcuxCsslFlowProtection.h>
#include <mcuxClCore_FunctionIdentifiers.h> // Code flow protection
#include <mcuxClToolchain.h>             // memory segment definitions
#include <mcuxClExample_Session_Helper.h>
#include <mcuxClCore_Examples.h>
#include <mcuxClExample_RNG_Helper.h>
 
static const ALIGNED uint8_t data[3] = {
    0x61u, 0x62u, 0x63u
};
 
static const ALIGNED uint8_t hashExpected[28] = {
    0x23u, 0x09u, 0x7Du, 0x22u, 0x34u, 0x05u, 0xD8u, 0x22u,
    0x86u, 0x42u, 0xA4u, 0x77u, 0xBDu, 0xA2u, 0x55u, 0xB3u,
    0x2Au, 0xADu, 0xBCu, 0xE4u, 0xBDu, 0xA0u, 0xB3u, 0xF7u,
    0xE3u, 0x6Cu, 0x9Du, 0xA7u
};
 
 
MCUXCLEXAMPLE_FUNCTION(mcuxClHashModes_sha224_oneshot_example)
{
    /**************************************************************************/
    /* Preparation                                                            */
    /**************************************************************************/
 
    /* Initialize session */
    mcuxClSession_Descriptor_t sessionDesc;
    mcuxClSession_Handle_t session = &sessionDesc;
 
    /* Allocate and initialize session */
    MCUXCLEXAMPLE_ALLOCATE_AND_INITIALIZE_SESSION(session, MCUXCLEXAMPLE_MAX_WA(MCUXCLHASH_MAX_CPU_WA_BUFFER_SIZE, MCUXCLRANDOM_NCINIT_WACPU_SIZE), 0u);
 
    /* Initialize the PRNG */
    MCUXCLEXAMPLE_INITIALIZE_PRNG(session);
 
    /**************************************************************************/
    /* Hash computation                                                       */
    /**************************************************************************/
 
    ALIGNED uint8_t hash[MCUXCLHASH_OUTPUT_SIZE_SHA_224];
    MCUXCLBUFFER_INIT_RW(hashBuf, session, hash, sizeof(hash));
    MCUXCLBUFFER_INIT_RO(dataBuf, session, data, sizeof(data));
 
    uint32_t hashOutputSize = 0u;
 
    MCUX_CSSL_FP_FUNCTION_CALL_BEGIN(result, token2, mcuxClHash_compute(
    /* mcuxClSession_Handle_t session: */ session,
    /* mcuxClHash_Algo_t algorithm:    */ mcuxClHash_Algorithm_Sha224,
    /* mcuxCl_InputBuffer_t pIn:       */ dataBuf,
    /* uint32_t inSize:               */ sizeof(data),
    /* mcuxCl_Buffer_t pOut            */ hashBuf,
    /* uint32_t *const pOutSize,      */ &hashOutputSize
    ));
 
    if((MCUX_CSSL_FP_FUNCTION_CALLED(mcuxClHash_compute) != token2) || (MCUXCLHASH_STATUS_OK != result))
    {
        return MCUXCLEXAMPLE_STATUS_ERROR;
    }
    MCUX_CSSL_FP_FUNCTION_CALL_END();
 
    if(sizeof(hash) != hashOutputSize)
    {
        return MCUXCLEXAMPLE_STATUS_ERROR;
    }
 
    /**************************************************************************/
    /* Verification                                                           */
    /**************************************************************************/
    for(size_t i = 0U; i < sizeof(hash); i++)
    {
        MCUX_CSSL_ANALYSIS_START_SUPPRESS_ALREADY_INITIALIZED("Initialized by MCUXCLBUFFER_INIT_RW")
        if(hashExpected[i] != hash[i])  // Expect that the resulting hash matches our expected output
        MCUX_CSSL_ANALYSIS_STOP_SUPPRESS_ALREADY_INITIALIZED()
        {
            return MCUXCLEXAMPLE_STATUS_ERROR;
        }
    }
 
    /**************************************************************************/
    /* Session clean-up                                                       */
    /**************************************************************************/
    if(!mcuxClExample_Session_Clean(session))
    {
        return MCUXCLEXAMPLE_STATUS_ERROR;
    }
 
    return MCUXCLEXAMPLE_STATUS_OK;
}