//

// Sha3_256.c

//

// Copyright (c) Microsoft Corporation. Licensed under the MIT license.

//

#include "precomp.h"

//

// See the symcrypt.h file for documentation on what the various functions do.

//

const SYMCRYPT_HASH SymCryptSha3_256Algorithm_default = {

    &SymCryptSha3_256Init,

    &SymCryptSha3_256Append,

    &SymCryptSha3_256Result,

    NULL,                           // AppendBlocks function is not implemented for SHA-3

    &SymCryptSha3_256StateCopy,

    sizeof(SYMCRYPT_SHA3_256_STATE),

    SYMCRYPT_SHA3_256_RESULT_SIZE,

    SYMCRYPT_SHA3_256_INPUT_BLOCK_SIZE,

    SYMCRYPT_FIELD_OFFSET(SYMCRYPT_SHA3_256_STATE, ks.state),

    SYMCRYPT_FIELD_SIZE(SYMCRYPT_SHA3_256_STATE, ks.state),

};

const PCSYMCRYPT_HASH SymCryptSha3_256Algorithm = &SymCryptSha3_256Algorithm_default;

//

// SymCryptSha3_256

//

#define ALG     SHA3_256

#define Alg     Sha3_256

#include "hash_pattern.c"

#undef ALG

#undef Alg

//

// SymCryptSha3_256Init

//

VOID

SYMCRYPT_CALL

SymCryptSha3_256Init(_Out_ PSYMCRYPT_SHA3_256_STATE pState)

{

    SymCryptKeccakInit(&pState->ks,

                        SYMCRYPT_SHA3_256_INPUT_BLOCK_SIZE,

                        SYMCRYPT_SHA3_PADDING_VALUE);

    SYMCRYPT_SET_MAGIC(pState);

}

//

// SymCryptSha3_256Append

//

VOID

SYMCRYPT_CALL

SymCryptSha3_256Append(

    _Inout_             PSYMCRYPT_SHA3_256_STATE    pState,

    _In_reads_(cbData)  PCBYTE                      pbData,

                        SIZE_T                      cbData)

{

    SymCryptKeccakAppend(&pState->ks, pbData, cbData);

}

//

// SymCryptSha3_256Result

//

VOID

SYMCRYPT_CALL

SymCryptSha3_256Result(

    _Inout_                                     PSYMCRYPT_SHA3_256_STATE    pState,

    _Out_writes_(SYMCRYPT_SHA3_256_RESULT_SIZE) PBYTE                       pbResult)

{

    SymCryptKeccakExtract(&pState->ks, pbResult, SYMCRYPT_SHA3_256_RESULT_SIZE, TRUE);

}

//

// SymCryptSha3_256StateExport

//

VOID

SYMCRYPT_CALL

SymCryptSha3_256StateExport(

    _In_                                                    PCSYMCRYPT_SHA3_256_STATE   pState,

    _Out_writes_bytes_(SYMCRYPT_SHA3_512_STATE_EXPORT_SIZE) PBYTE                       pbBlob)

{

    SYMCRYPT_CHECK_MAGIC(pState);

    SymCryptKeccakStateExport(SymCryptBlobTypeSha3_256State, &pState->ks, pbBlob);

}

//

// SymCryptSha3_256StateImport

//

SYMCRYPT_ERROR

SYMCRYPT_CALL

SymCryptSha3_256StateImport(

    _Out_                                                   PSYMCRYPT_SHA3_256_STATE    pState,

    _In_reads_bytes_(SYMCRYPT_SHA3_256_STATE_EXPORT_SIZE)   PCBYTE                      pbBlob)

{

    SYMCRYPT_ERROR scError = SymCryptKeccakStateImport(SymCryptBlobTypeSha3_256State, &pState->ks, pbBlob);

    if (scError == SYMCRYPT_NO_ERROR)

    {

        SYMCRYPT_SET_MAGIC(pState);

    }

    return scError;

}

//

// Simple test vector for FIPS module testing

//

static const BYTE sha3_256KATAnswer[32] = {

    0x3a, 0x98, 0x5d, 0xa7, 0x4f, 0xe2, 0x25, 0xb2,

    0x04, 0x5c, 0x17, 0x2d, 0x6b, 0xd3, 0x90, 0xbd,

    0x85, 0x5f, 0x08, 0x6e, 0x3e, 0x9d, 0x52, 0x5b,

    0x46, 0xbf, 0xe2, 0x45, 0x11, 0x43, 0x15, 0x32

};

VOID

SYMCRYPT_CALL

SymCryptSha3_256Selftest(void)

{

    BYTE result[SYMCRYPT_SHA3_256_RESULT_SIZE];

    SymCryptSha3_256(SymCryptTestMsg3, sizeof(SymCryptTestMsg3), result);

    SymCryptInjectError(result, sizeof(result));

    if (memcmp(result, sha3_256KATAnswer, sizeof(result)) != 0)

    {

        SymCryptFatal('SHA3');

    }

}