/** 

 * XMLSec library

 *

 * This is free software; see Copyright file in the source

 * distribution for preciese wording.

 * 

 * Copyright (C) 2002-2003 Aleksey Sanin <aleksey@aleksey.com>

 * Portion Copyright © 2009 Nokia Corporation and/or its subsidiary(-ies). All rights reserved. 

 */

#include "xmlsecc_config.h"

#ifndef XMLSEC_NO_HMAC

#include "xmlsecc_globals.h"

#include <string.h>

#include <stdapis/libxml2/libxml2_globals.h>

#include <e32err.h>         //definition of KErrNoMemory

#include "xmlsec_xmlsec.h"

#include "xmlsec_xmltree.h"

#include "xmlsec_keys.h"

#include "xmlsec_transforms.h"

#include "xmlsec_errors.h"

#include "xmlsec_error_flag.h"

#include "xmlsecc_app.h"

#include "xmlsecc_crypto.h"

#include "xmlsecc_cryptowrapper.h"

#define XMLSEC_SYMBIANCRYPTO_MAX_HMAC_SIZE		128

/**************************************************************************

 *

 * Internal SYMBIANCRYPTO HMAC CTX

 *

 *****************************************************************************/

typedef struct _xmlSecSymbianCryptoHmacCtx 

                                      xmlSecSymbianCryptoHmacCtx, *xmlSecSymbianCryptoHmacCtxPtr;

struct _xmlSecSymbianCryptoHmacCtx {

    int			digest;

    ScMDHd		digestCtx;

    xmlSecByte	 	dgst[XMLSEC_SYMBIANCRYPTO_MAX_HMAC_SIZE];

    xmlSecSize		dgstSize;	/* dgst size in bits */

};	    

xmlSecTransformGetDataTypeMethod const xmlSecCrpytoGetDataTypeMethod  = xmlSecTransformDefaultGetDataType;

xmlSecTransformPushBinMethod const xmlSecCryptoPushBinMethod = xmlSecTransformDefaultPushBin;

xmlSecTransformPopBinMethod const xmlSecCryptoPopBinMethod = xmlSecTransformDefaultPopBin;

/******************************************************************************

 *

 * HMAC transforms

 *

 * xmlSecSymbianCryptoHmacCtx is located after xmlSecTransform

 *

 *****************************************************************************/

#define xmlSecSymbianCryptoHmacGetCtx(transform) \

    ((xmlSecSymbianCryptoHmacCtxPtr)(((xmlSecByte*)(transform)) + sizeof(xmlSecTransform)))

#define xmlSecSymbianCryptoHmacSize	\

    (sizeof(xmlSecTransform) + sizeof(xmlSecSymbianCryptoHmacCtx))

#define xmlSecSymbianCryptoHmacCheckId(transform) \

    (xmlSecTransformCheckId((transform), xmlSecSymbianCryptoTransformHmacSha1Id) || \

     xmlSecTransformCheckId((transform), xmlSecSymbianCryptoTransformHmacMd5Id) || \

     xmlSecTransformCheckId((transform), xmlSecSymbianCryptoTransformHmacRipemd160Id))

static int 	xmlSecSymbianCryptoHmacInitialize		(xmlSecTransformPtr transform);

static void 	xmlSecSymbianCryptoHmacFinalize		(xmlSecTransformPtr transform);

static int 	xmlSecSymbianCryptoHmacNodeRead		(xmlSecTransformPtr transform,

							 xmlNodePtr node,

							 xmlSecTransformCtxPtr transformCtx);

static int  	xmlSecSymbianCryptoHmacSetKeyReq		(xmlSecTransformPtr transform, 

							 xmlSecKeyReqPtr keyReq);

static int  	xmlSecSymbianCryptoHmacSetKey			(xmlSecTransformPtr transform, 

							 xmlSecKeyPtr key);

static int	xmlSecSymbianCryptoHmacVerify			(xmlSecTransformPtr transform, 

							 const xmlSecByte* data, 

							 xmlSecSize dataSize,

							 xmlSecTransformCtxPtr transformCtx);

static int 	xmlSecSymbianCryptoHmacExecute			(xmlSecTransformPtr transform, 

							 int last, 

							 xmlSecTransformCtxPtr transformCtx);

static int 

xmlSecSymbianCryptoHmacInitialize(xmlSecTransformPtr transform) {

    xmlSecSymbianCryptoHmacCtxPtr ctx;

#ifndef XMLSEC_GNUTLS_OLD

    //gpg_err_code_t ret;

#endif /* XMLSEC_GNUTLS_OLD */

	int ret;

    xmlSecAssert2(xmlSecSymbianCryptoHmacCheckId(transform), -1);

    xmlSecAssert2(xmlSecTransformCheckSize(transform, xmlSecSymbianCryptoHmacSize), -1);

    ctx = xmlSecSymbianCryptoHmacGetCtx(transform);

    xmlSecAssert2(ctx, -1);

    memset(ctx, 0, sizeof(xmlSecSymbianCryptoHmacCtx));

    if(xmlSecTransformCheckId(transform, xmlSecSymbianCryptoTransformHmacSha1Id)) {

        ctx->digest = SC_MD_SHA1;

    } else if(xmlSecTransformCheckId(transform, xmlSecSymbianCryptoTransformHmacMd5Id)) {

        ctx->digest = SC_MD_MD5;

    } else if(xmlSecTransformCheckId(transform, xmlSecSymbianCryptoTransformHmacRipemd160Id)) {

        ctx->digest = SC_MD_RMD160;

    } else {

	xmlSecError(XMLSEC_ERRORS_HERE, 

		    xmlSecErrorsSafeString(xmlSecTransformGetName(transform)),

		    NULL,

		    XMLSEC_ERRORS_R_INVALID_TRANSFORM,

		    XMLSEC_ERRORS_NO_MESSAGE);

	return(-1);

    }

    ret = sc_md_open(&ctx->digestCtx, ctx->digest, SC_MD_FLAG_HMAC | SC_MD_FLAG_SECURE); /* we are paranoid */

    if(ret != 0 /*GPG_ERR_NO_ERROR*/) {

        if ( ret != KErrNone )

            {

            xmlSecSetErrorFlag( ret );

            }

		xmlSecError(XMLSEC_ERRORS_HERE, 

			    xmlSecErrorsSafeString(xmlSecTransformGetName(transform)),

			    "gcry_md_open",

			    XMLSEC_ERRORS_R_CRYPTO_FAILED,

			    XMLSEC_ERRORS_NO_MESSAGE);

		return(-1);

    }

    return(0);

}

static void 

xmlSecSymbianCryptoHmacFinalize(xmlSecTransformPtr transform) {

    xmlSecSymbianCryptoHmacCtxPtr ctx;

    xmlSecAssert(xmlSecSymbianCryptoHmacCheckId(transform));    

    xmlSecAssert(xmlSecTransformCheckSize(transform, xmlSecSymbianCryptoHmacSize));

    ctx = xmlSecSymbianCryptoHmacGetCtx(transform);

    xmlSecAssert(ctx);

    if(ctx->digestCtx) {

	sc_md_close(ctx->digestCtx);

    }

    memset(ctx, 0, sizeof(xmlSecSymbianCryptoHmacCtx));

}

/**

 * xmlSecSymbianCryptoHmacNodeRead:

 *

 * HMAC (http://www.w3.org/TR/xmldsig-core/#sec-HMAC):

 *

 * The HMAC algorithm (RFC2104 [HMAC]) takes the truncation length in bits 

 * as a parameter; if the parameter is not specified then all the bits of the 

 * hash are output. An example of an HMAC SignatureMethod element:  

 * <SignatureMethod Algorithm="http://www.w3.org/2000/09/xmldsig#hmac-sha1">

 *   <HMACOutputLength>128</HMACOutputLength>

 * </SignatureMethod>

 * 

 * Schema Definition:

 * 

 * <simpleType name="HMACOutputLengthType">

 *   <restriction base="integer"/>

 * </simpleType>

 *     

 * DTD:

 *     

 * <!ELEMENT HMACOutputLength (#PCDATA)>

 */

static int

xmlSecSymbianCryptoHmacNodeRead(xmlSecTransformPtr transform, 

                                                xmlNodePtr node, 

                                                xmlSecTransformCtxPtr transformCtx) {

    xmlSecSymbianCryptoHmacCtxPtr ctx;

    xmlNodePtr cur;

    xmlSecAssert2(xmlSecSymbianCryptoHmacCheckId(transform), -1);

    xmlSecAssert2(xmlSecTransformCheckSize(transform, xmlSecSymbianCryptoHmacSize), -1);

    xmlSecAssert2(node, -1);

    xmlSecAssert2(transformCtx, -1);

    ctx = xmlSecSymbianCryptoHmacGetCtx(transform);

    xmlSecAssert2(ctx, -1);

    cur = xmlSecGetNextElementNode(node->children); 

    if((cur) && xmlSecCheckNodeName(cur, xmlSecNodeHMACOutputLength, xmlSecDSigNs)) {  

	xmlChar *content;

	content = xmlNodeGetContent(cur);

	if(content) {

	    ctx->dgstSize = atoi((char*)content);	    

	    xmlFree(content);

	}

	cur = xmlSecGetNextElementNode(cur->next);

    }

    if(cur) {

	xmlSecError(XMLSEC_ERRORS_HERE,

		    xmlSecErrorsSafeString(xmlSecTransformGetName(transform)),

		    xmlSecNodeGetName(cur),

		    XMLSEC_ERRORS_R_INVALID_NODE,

		    "no nodes expected");

	return(-1);

    }

    return(0); 

}

static int  

xmlSecSymbianCryptoHmacSetKeyReq(xmlSecTransformPtr transform,  xmlSecKeyReqPtr keyReq) {

    xmlSecSymbianCryptoHmacCtxPtr ctx;

    xmlSecAssert2(xmlSecSymbianCryptoHmacCheckId(transform), -1);

    xmlSecAssert2((transform->operation == xmlSecTransformOperationSign) 

                                || (transform->operation == xmlSecTransformOperationVerify), -1);

    xmlSecAssert2(keyReq, -1);

    xmlSecAssert2(xmlSecTransformCheckSize(transform, xmlSecSymbianCryptoHmacSize), -1);

    ctx = xmlSecSymbianCryptoHmacGetCtx(transform);

    xmlSecAssert2(ctx, -1);

    keyReq->keyId  = xmlSecSymbianCryptoKeyDataHmacId;

    keyReq->keyType= xmlSecKeyDataTypeSymmetric;

    if(transform->operation == xmlSecTransformOperationSign) {

	keyReq->keyUsage = xmlSecKeyUsageSign;

    } else {

	keyReq->keyUsage = xmlSecKeyUsageVerify;

    }

    return(0);

}

static int

xmlSecSymbianCryptoHmacSetKey(xmlSecTransformPtr transform, xmlSecKeyPtr key) {

    xmlSecSymbianCryptoHmacCtxPtr ctx;

    xmlSecKeyDataPtr value;

    xmlSecBufferPtr buffer;    

    int ret;

    xmlSecAssert2(xmlSecSymbianCryptoHmacCheckId(transform), -1);

    xmlSecAssert2((transform->operation == xmlSecTransformOperationSign) 

                                || (transform->operation == xmlSecTransformOperationVerify), -1);

    xmlSecAssert2(xmlSecTransformCheckSize(transform, xmlSecSymbianCryptoHmacSize), -1);

    xmlSecAssert2(key, -1);

    ctx = xmlSecSymbianCryptoHmacGetCtx(transform);

    xmlSecAssert2(ctx, -1);

    xmlSecAssert2(ctx->digestCtx, -1);

    value = xmlSecKeyGetValue(key);

    xmlSecAssert2(xmlSecKeyDataCheckId(value, xmlSecSymbianCryptoKeyDataHmacId), -1);

    buffer = xmlSecKeyDataBinaryValueGetBuffer(value);

    xmlSecAssert2(buffer, -1);

    if(xmlSecBufferGetSize(buffer) == 0) {

	xmlSecError(XMLSEC_ERRORS_HERE, 

		    xmlSecErrorsSafeString(xmlSecTransformGetName(transform)),

		    NULL,

		    XMLSEC_ERRORS_R_INVALID_KEY_DATA_SIZE,

		    "key is empty");

	return(-1);    

    }    

    ret = sc_md_setkey(ctx->digestCtx, xmlSecBufferGetData(buffer), 

			xmlSecBufferGetSize(buffer));			

    if(ret != 0) {

	xmlSecError(XMLSEC_ERRORS_HERE, 

		    xmlSecErrorsSafeString(xmlSecTransformGetName(transform)),

		    "gcry_md_setkey",

		    XMLSEC_ERRORS_R_CRYPTO_FAILED,

		    "ret=%d", ret);

	return(-1);

    }

    return(0);

}

static int

xmlSecSymbianCryptoHmacVerify(xmlSecTransformPtr transform, 

			const xmlSecByte* data, xmlSecSize dataSize,

			xmlSecTransformCtxPtr transformCtx) {

    static xmlSecByte last_byte_masks[] = 	

		{ 0xFF, 0x80, 0xC0, 0xE0, 0xF0, 0xF8, 0xFC, 0xFE };

    xmlSecSymbianCryptoHmacCtxPtr ctx;

    xmlSecByte mask;

    xmlSecAssert2(xmlSecTransformIsValid(transform), -1);

    xmlSecAssert2(xmlSecTransformCheckSize(transform, xmlSecSymbianCryptoHmacSize), -1);

    xmlSecAssert2(transform->operation == xmlSecTransformOperationVerify, -1);

    xmlSecAssert2(transform->status == xmlSecTransformStatusFinished, -1);

    xmlSecAssert2(data, -1);

    xmlSecAssert2(transformCtx, -1);

    ctx = xmlSecSymbianCryptoHmacGetCtx(transform);

    xmlSecAssert2(ctx, -1);

    xmlSecAssert2(ctx->digestCtx, -1);

    xmlSecAssert2(ctx->dgstSize > 0, -1);

    /* compare the digest size in bytes */

    if(dataSize != ((ctx->dgstSize + 7) / 8)){

	xmlSecError(XMLSEC_ERRORS_HERE, 

		    xmlSecErrorsSafeString(xmlSecTransformGetName(transform)),

		    NULL,

		    XMLSEC_ERRORS_R_INVALID_SIZE,

		    "data=%d;dgst=%d",

		    dataSize, ((ctx->dgstSize + 7) / 8));

	transform->status = xmlSecTransformStatusFail;

	return(0);

    }

    /* we check the last byte separatelly */

    xmlSecAssert2(dataSize > 0, -1);

    mask = last_byte_masks[ctx->dgstSize % 8];

    if((ctx->dgst[dataSize - 1] & mask) != (data[dataSize - 1]  & mask)) {

	xmlSecError(XMLSEC_ERRORS_HERE, 

		    xmlSecErrorsSafeString(xmlSecTransformGetName(transform)),

		    NULL,

		    XMLSEC_ERRORS_R_DATA_NOT_MATCH,

		    "data and digest do not match (last byte)");

	transform->status = xmlSecTransformStatusFail;

	return(0);

    }

    /* now check the rest of the digest */

    if((dataSize > 1) && (memcmp(ctx->dgst, data, dataSize - 1) != 0)) {

	xmlSecError(XMLSEC_ERRORS_HERE, 

		    xmlSecErrorsSafeString(xmlSecTransformGetName(transform)),

		    NULL,

		    XMLSEC_ERRORS_R_DATA_NOT_MATCH,

		    "data and digest do not match");

	transform->status = xmlSecTransformStatusFail;

	return(0);

    }

    transform->status = xmlSecTransformStatusOk;

    return(0);

}

static int 

xmlSecSymbianCryptoHmacExecute(xmlSecTransformPtr transform, 

                                            int last, 

                                            xmlSecTransformCtxPtr transformCtx) {

    xmlSecSymbianCryptoHmacCtxPtr ctx;

    xmlSecBufferPtr in, out;

    const xmlSecByte* dgst;

    xmlSecSize dgstSize;

    int ret;

    xmlSecAssert2(xmlSecSymbianCryptoHmacCheckId(transform), -1);

    xmlSecAssert2((transform->operation == xmlSecTransformOperationSign) 

                                || (transform->operation == xmlSecTransformOperationVerify), -1);

    xmlSecAssert2(xmlSecTransformCheckSize(transform, xmlSecSymbianCryptoHmacSize), -1);

    xmlSecAssert2(transformCtx, -1);

    ctx = xmlSecSymbianCryptoHmacGetCtx(transform);

    xmlSecAssert2(ctx, -1);

    xmlSecAssert2(ctx->digestCtx, -1);

    in = &(transform->inBuf);

    out = &(transform->outBuf);

    if(transform->status == xmlSecTransformStatusNone) {

	transform->status = xmlSecTransformStatusWorking;

    }

    if(transform->status == xmlSecTransformStatusWorking) {

	xmlSecSize inSize;

	inSize = xmlSecBufferGetSize(in);

	if(inSize > 0) {

	    sc_md_write(ctx->digestCtx, xmlSecBufferGetData(in), inSize);

	    ret = xmlSecBufferRemoveHead(in, inSize);

	    if(ret < 0) {

		xmlSecError(XMLSEC_ERRORS_HERE, 

			    xmlSecErrorsSafeString(xmlSecTransformGetName(transform)),

			    "xmlSecBufferRemoveHead",

			    XMLSEC_ERRORS_R_XMLSEC_FAILED,

			    "size=%d", inSize);

		return(-1);

	    }

	}

	if(last) {	    

	    /* get the final digest */

	    dgstSize = sc_md_get_algo_dlen(ctx->digestCtx);

	    sc_md_final(ctx->digestCtx);	    

	    dgst = sc_md_read(ctx->digestCtx, ctx->digest);

	    if(!dgst) {

		xmlSecError(XMLSEC_ERRORS_HERE, 

			    xmlSecErrorsSafeString(xmlSecTransformGetName(transform)),

			    "gcry_md_read",

			    XMLSEC_ERRORS_R_CRYPTO_FAILED,

			    XMLSEC_ERRORS_NO_MESSAGE);

	        return(-1);

	    }

	    /* copy it to our internal buffer */

	    //dgstSize = sc_md_get_algo_dlen(ctx->digest);

	    xmlSecAssert2(dgstSize > 0, -1);

	    xmlSecAssert2(dgstSize <= sizeof(ctx->dgst), -1);

	    memcpy(ctx->dgst, dgst, dgstSize);

	    /* check/set the result digest size */

	    if(ctx->dgstSize == 0) {

		ctx->dgstSize = dgstSize * 8; /* no dgst size specified, use all we have */

	    } else if(ctx->dgstSize <= 8 * dgstSize) {

		dgstSize = ((ctx->dgstSize + 7) / 8); /* we need to truncate result digest */

	    } else {

		xmlSecError(XMLSEC_ERRORS_HERE, 

			    xmlSecErrorsSafeString(xmlSecTransformGetName(transform)),

			    NULL,

			    XMLSEC_ERRORS_R_INVALID_SIZE,

			    "result-bits=%d;required-bits=%d",

			    8 * dgstSize, ctx->dgstSize);

		return(-1);

	    }

	    if(transform->operation == xmlSecTransformOperationSign) {

		ret = xmlSecBufferAppend(out, ctx->dgst, dgstSize);

		if(ret < 0) {

		    xmlSecError(XMLSEC_ERRORS_HERE, 

				xmlSecErrorsSafeString(xmlSecTransformGetName(transform)),

				"xmlSecBufferAppend",

				XMLSEC_ERRORS_R_XMLSEC_FAILED,

				"size=%d", dgstSize);

		    return(-1);

		}

	    }

	    transform->status = xmlSecTransformStatusFinished;

	}

    } else if(transform->status == xmlSecTransformStatusFinished) {

	/* the only way we can get here is if there is no input */

	xmlSecAssert2(xmlSecBufferGetSize(&(transform->inBuf)) == 0, -1);

    } else {

	xmlSecError(XMLSEC_ERRORS_HERE, 

		    xmlSecErrorsSafeString(xmlSecTransformGetName(transform)),

		    NULL,

		    XMLSEC_ERRORS_R_INVALID_STATUS,

		    "size=%d", transform->status);

	return(-1);

    }

    return(0);

}

/** 

 * HMAC SHA1

 */

static xmlSecTransformKlass xmlSecSymbianCryptoHmacSha1Klass = {

    /* klass/object sizes */

    sizeof(xmlSecTransformKlass),		/* xmlSecSize klassSize */

    xmlSecSymbianCryptoHmacSize,			/* xmlSecSize objSize */

    xmlSecNameHmacSha1,				/* const xmlChar* name; */

    xmlSecHrefHmacSha1, 			/* const xmlChar *href; */

    xmlSecTransformUsageSignatureMethod,	/* xmlSecTransformUsage usage; */

    xmlSecSymbianCryptoHmacInitialize,			/* xmlSecTransformInitializeMethod initialize; */

    xmlSecSymbianCryptoHmacFinalize,			/* xmlSecTransformFinalizeMethod finalize; */

    xmlSecSymbianCryptoHmacNodeRead,			/* xmlSecTransformNodeReadMethod readNode; */

    NULL,					/* xmlSecTransformNodeWriteMethod writeNode; */

    xmlSecSymbianCryptoHmacSetKeyReq,			/* xmlSecTransformSetKeyReqMethod setKeyReq; */

    xmlSecSymbianCryptoHmacSetKey,			/* xmlSecTransformSetKeyMethod setKey; */

    xmlSecSymbianCryptoHmacVerify,			/* xmlSecTransformValidateMethod validate; */

    xmlSecCrpytoGetDataTypeMethod,		/* xmlSecTransformGetDataTypeMethod getDataType; */

    xmlSecCryptoPushBinMethod,		/* xmlSecTransformPushBinMethod pushBin; */

    xmlSecCryptoPopBinMethod,		/* xmlSecTransformPopBinMethod popBin; */

    NULL,					/* xmlSecTransformPushXmlMethod pushXml; */

    NULL,					/* xmlSecTransformPopXmlMethod popXml; */

    xmlSecSymbianCryptoHmacExecute,			/* xmlSecTransformExecuteMethod execute; */

    NULL,					/* void* reserved0; */

    NULL,					/* void* reserved1; */

};

/** 

 * xmlSecSymbianCryptoTransformHmacSha1GetKlass:

 *

 * The HMAC-SHA1 transform klass.

 *

 * Returns the HMAC-SHA1 transform klass.

 */

EXPORT_C

xmlSecTransformId 

xmlSecSymbianCryptoTransformHmacSha1GetKlass(void) {

    return(&xmlSecSymbianCryptoHmacSha1Klass);

}

/** 

 * HMAC Ripemd160

 */

static xmlSecTransformKlass xmlSecSymbianCryptoHmacRipemd160Klass = {

    /* klass/object sizes */

    sizeof(xmlSecTransformKlass),		/* xmlSecSize klassSize */

    xmlSecSymbianCryptoHmacSize,			/* xmlSecSize objSize */

    xmlSecNameHmacRipemd160,			/* const xmlChar* name; */

    xmlSecHrefHmacRipemd160, 			/* const xmlChar* href; */

    xmlSecTransformUsageSignatureMethod,	/* xmlSecTransformUsage usage; */

    xmlSecSymbianCryptoHmacInitialize,			/* xmlSecTransformInitializeMethod initialize; */

    xmlSecSymbianCryptoHmacFinalize,			/* xmlSecTransformFinalizeMethod finalize; */

    xmlSecSymbianCryptoHmacNodeRead,			/* xmlSecTransformNodeReadMethod readNode; */

    NULL,					/* xmlSecTransformNodeWriteMethod writeNode; */

    xmlSecSymbianCryptoHmacSetKeyReq,			/* xmlSecTransformSetKeyReqMethod setKeyReq; */

    xmlSecSymbianCryptoHmacSetKey,			/* xmlSecTransformSetKeyMethod setKey; */

    xmlSecSymbianCryptoHmacVerify,			/* xmlSecTransformValidateMethod validate; */

    xmlSecCrpytoGetDataTypeMethod,		/* xmlSecTransformGetDataTypeMethod getDataType; */

    xmlSecCryptoPushBinMethod,		/* xmlSecTransformPushBinMethod pushBin; */

    xmlSecCryptoPopBinMethod,		/* xmlSecTransformPopBinMethod popBin; */

    NULL,					/* xmlSecTransformPushXmlMethod pushXml; */

    NULL,					/* xmlSecTransformPopXmlMethod popXml; */

    xmlSecSymbianCryptoHmacExecute,			/* xmlSecTransformExecuteMethod execute; */

    NULL,					/* void* reserved0; */

    NULL,					/* void* reserved1; */

};

/** 

 * xmlSecSymbianCryptoTransformHmacRipemd160GetKlass:

 *

 * The HMAC-RIPEMD160 transform klass.

 *

 * Returns the HMAC-RIPEMD160 transform klass.

 */

EXPORT_C

xmlSecTransformId 

xmlSecSymbianCryptoTransformHmacRipemd160GetKlass(void) {

    return(&xmlSecSymbianCryptoHmacRipemd160Klass);

}