third_party/NordicSemiconductor/libraries/crypto/sha256_alt_cc310.c

/*
 *  Copyright (c) 2018, The OpenThread Authors.
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 *  modification, are permitted provided that the following conditions are met:
 *  1. Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *  2. Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *  3. Neither the name of the copyright holder nor the
 *     names of its contributors may be used to endorse or promote products
 *     derived from this software without specific prior written permission.
 *
 *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 *  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 *  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 *  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 *  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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 *  POSSIBILITY OF SUCH DAMAGE.
 */

#include "mbedtls/sha256.h"

#include <string.h>

#ifdef MBEDTLS_SHA256_ALT

#include "cc310_mbedtls.h"

void mbedtls_sha256_init(mbedtls_sha256_context * ctx)
{
    memset(ctx, 0, sizeof(*ctx));
}

void mbedtls_sha256_free(mbedtls_sha256_context * ctx)
{
    CC310_OPERATION_NO_RESULT(CRYS_HASH_Free(&ctx->hardware.user_context));
}

void mbedtls_sha256_clone(mbedtls_sha256_context *dst, const mbedtls_sha256_context *src)
{
    memcpy(dst, src, sizeof(*dst));
}

int mbedtls_sha256_starts_ret(mbedtls_sha256_context * ctx, int is224)
{
    if (is224)
    {
        ctx->hardware.mode = CRYS_HASH_SHA224_mode;
    }
    else
    {
        ctx->hardware.mode = CRYS_HASH_SHA256_mode;
    }

    CC310_OPERATION_NO_RESULT(CRYS_HASH_Init(&ctx->hardware.user_context, ctx->hardware.mode));

    return 0;
}

int mbedtls_sha256_update_ret(mbedtls_sha256_context * ctx, const unsigned char * input, size_t ilen)
{
    CC310_OPERATION_NO_RESULT(CRYS_HASH_Update(&ctx->hardware.user_context, (unsigned char *)input, ilen));
    return 0;
}

int mbedtls_sha256_finish_ret(mbedtls_sha256_context * ctx, unsigned char output[32])
{
    CRYS_HASH_Result_t result;

    memset(result, 0, sizeof(result));

    CC310_OPERATION_NO_RESULT(CRYS_HASH_Finish(&ctx->hardware.user_context, result));

    uint8_t size = CRYS_HASH_SHA256_DIGEST_SIZE_IN_BYTES;

    if (ctx->hardware.mode == CRYS_HASH_SHA224_mode)
    {
        size = CRYS_HASH_SHA224_DIGEST_SIZE_IN_BYTES;
    }

    memcpy(output, result, size);

    return 0;
}

int mbedtls_internal_sha256_process(mbedtls_sha256_context *ctx, const unsigned char data[64])
{
    return mbedtls_sha256_update_ret(ctx, data, 64);
}

#endif /* MBEDTLS_SHA256_ALT */