//

// HmacSha256.c

//

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

//

#include "precomp.h"

#define ALG SHA256

#define Alg Sha256

#define SET_DATALENGTH( state, len )    {state.dataLengthL = len;}

#include "hmac_pattern.c"

#undef SET_DATALENGTH

#undef Alg

#undef ALG

const SYMCRYPT_MAC SymCryptHmacSha256Algorithm_default = {

    SymCryptHmacSha256ExpandKey,

    SymCryptHmacSha256Init,

    SymCryptHmacSha256Append,

    SymCryptHmacSha256Result,

    sizeof(SYMCRYPT_HMAC_SHA256_EXPANDED_KEY),

    sizeof(SYMCRYPT_HMAC_SHA256_STATE),

    SYMCRYPT_HMAC_SHA256_RESULT_SIZE,

    &SymCryptSha256Algorithm,

    SYMCRYPT_FIELD_OFFSET( SYMCRYPT_HMAC_SHA256_EXPANDED_KEY, outerState ),

};

const PCSYMCRYPT_MAC SymCryptHmacSha256Algorithm = &SymCryptHmacSha256Algorithm_default;

static const BYTE hmacSha256Kat[32] = {

    0xd6, 0x01, 0xcc, 0x17, 0x75, 0x59, 0xb0, 0x24, 

    0x84, 0x59, 0x78, 0x7f, 0x7e, 0x80, 0x4e, 0xd7, 

    0xf2, 0x76, 0x89, 0xb5, 0x99, 0x5c, 0x59, 0xb6, 

    0x61, 0x80, 0x2d, 0x96, 0x82, 0xfd, 0xf8, 0xd2,

};

VOID

SYMCRYPT_CALL

SymCryptHmacSha256Selftest(void)

{

    SYMCRYPT_HMAC_SHA256_EXPANDED_KEY xKey;

    BYTE res[SYMCRYPT_HMAC_SHA256_RESULT_SIZE];

    SymCryptHmacSha256ExpandKey( &xKey, SymCryptTestKey32, 16 );

    SymCryptHmacSha256( &xKey, SymCryptTestMsg3, sizeof( SymCryptTestMsg3 ), res );

    SymCryptInjectError( res, sizeof( res ) );

    if( memcmp( res, hmacSha256Kat, sizeof( res ) ) != 0 ) 

    {

        SymCryptFatal( 'hsh2' );

    }

    //

    // Normally we would wipe the expanded key structure here,

    // but as this is a selftest with known data this is not needed.

    //

}