Exemplo n.º 1
0
BYTE Snmpv3AuthenticateTxPduForDataIntegrity(SNMPV3_RESPONSE_WHOLEMSG* txDataPtr)
{	
UINT8* secNamePtr;
UINT8 i;
static HASH_SUM md5;
UINT8* tempPtr;
UINT8 hashTYpe;

	hashTYpe=snmpV3UserDataBase[gSnmpv3UserDBIndex].userHashType;	

	if(hashTYpe == SNMPV3_HAMC_MD5)
	{

		MD5Initialize(&md5);
		MD5AddData(&md5,snmpV3UserDataBase[gSnmpv3UserDBIndex].userAuthLocalKeyHmacIpad, (WORD)0x40);
		MD5AddData(&md5, txDataPtr->wholeMsgHead, txDataPtr->wholeMsgLen.Val);
		MD5Calculate(&md5, HmacMd5Digest);
		
		MD5Initialize(&md5);
		MD5AddData(&md5, snmpV3UserDataBase[gSnmpv3UserDBIndex].userAuthLocalKeyHmacOpad, (WORD)0x40);
		MD5AddData(&md5, HmacMd5Digest,16);
		MD5Calculate(&md5, HmacMd5Digest);

		
	}
	else if(hashTYpe == SNMPV3_HMAC_SHA1)
	{
		SHA1Initialize(&md5);
		SHA1AddData(&md5,snmpV3UserDataBase[gSnmpv3UserDBIndex].userAuthLocalKeyHmacIpad, (WORD)0x40);
		SHA1AddData(&md5, txDataPtr->wholeMsgHead, txDataPtr->wholeMsgLen.Val);
		SHA1Calculate(&md5, HmacSHADigest);
		
		SHA1Initialize(&md5);
		SHA1AddData(&md5, snmpV3UserDataBase[gSnmpv3UserDBIndex].userAuthLocalKeyHmacOpad, (WORD)0x40);
		SHA1AddData(&md5, HmacSHADigest,20);
		SHA1Calculate(&md5, HmacSHADigest);
	
	}
	else
		return SNMPV3_MSG_AUTH_FAIL ;

	//Authparam validated on WholeMsg. Write back the auth param string to received buffer	
	tempPtr=snmpOutMsgAuthParamStrng;
	if(hashTYpe == SNMPV3_HAMC_MD5)
		secNamePtr=HmacMd5Digest;
	else if(hashTYpe == SNMPV3_HMAC_SHA1)
		secNamePtr=HmacSHADigest;
		

	i=0;
	for(i=0;i < 12/*snmpOutMsgAuthParamLen Should be 12 Bytes*/;i++)
	{
		tempPtr[i]=secNamePtr[i];
	}
	return SNMPV3_MSG_AUTH_PASS;
}
Exemplo n.º 2
0
/****************************************************************************
  Function:
	static void SNMPv3PswdToLocalizedAuthKeyMD5Hashing(UINT8* pswdToLocalized, UINT8 pswdLen)
	
  Summary:
  	Convert MD5 Auth password to the localized Key using SNMPEngineID.
	
  Description:
  	This routine converts HMAC-MD5 authentication password key
  	to localized key using snmpSngineID(RFC- 3414).
  	 		 		  	
  Precondition:
   	SNMPv3Init() and ProcessVariabels() are called.	

  Parameters:
  	pswdToLocalized -  password storage poniter 
  	pswdLen - password length.
  	
  Return Values:
	None

  Remarks:
	None 
***************************************************************************/
static void SNMPv3PswdToLocalizedAuthKeyMD5Hashing(uint8_t* pswdToLocalized, uint8_t pswdLen)
{
static HASH_SUM md5;
uint8_t *compressionPtr, pswdBuf[64];
uint32_t index = 0;
uint32_t count = 0, i;
uint8_t* pswdPtr;
SNMPV3_PROCESSING_MEM_INFO_PTRS snmpv3PktProcessingMemPntr; 
SNMPV3_STACK_DCPT_STUB * snmpv3EngnDcptMemoryStubPtr=0;		
				
	SNMPv3GetPktProcessingDynMemStubPtrs(&snmpv3PktProcessingMemPntr);
				
	snmpv3EngnDcptMemoryStubPtr=snmpv3PktProcessingMemPntr.snmpv3StkProcessingDynMemStubPtr;


	pswdPtr=pswdToLocalized;

	MD5Initialize(&md5);
	
	while (count < 1048576)
	{
		compressionPtr = pswdBuf;
		for (i = 0; i < 64; i++) 
		{
			*compressionPtr++ = pswdPtr[index++ % pswdLen];
		}


		MD5AddData(&md5, pswdBuf, 64);
		count+=64;
	
	}
	MD5Calculate(&md5, md5LocalizedAuthKey);

	memcpy(pswdBuf, md5LocalizedAuthKey, 16 /*localizedAuthKey buf len*/);
	memcpy(pswdBuf+16, snmpv3EngnDcptMemoryStubPtr->SnmpEngineID, snmpv3EngnDcptMemoryStubPtr->SnmpEngnIDLength);
	memcpy(pswdBuf+16+snmpv3EngnDcptMemoryStubPtr->SnmpEngnIDLength, md5LocalizedAuthKey, 16 /*localizedAuthKey buf len*/);

	MD5Initialize(&md5);
	MD5AddData(&md5,pswdBuf,32+snmpv3EngnDcptMemoryStubPtr->SnmpEngnIDLength);
	
	MD5Calculate(&md5, md5LocalizedAuthKey);

	count+=64;

	return;
}
Exemplo n.º 3
0
void Snmpv3Pswd2LocalizedAuthKeyMD5Hashing(UINT8* pswdToLocalized, UINT8 pswdLen)
{
static HASH_SUM md5;
UINT8 *compressionPtr, pswdBuf[64];
UINT32 index = 0;
UINT32 count = 0, i;
UINT8* pswdPtr;

	pswdPtr=pswdToLocalized;

	MD5Initialize(&md5);
	
	while (count < 1048576)
	{
		compressionPtr = pswdBuf;
		for (i = 0; i < 64; i++) 
		{
			*compressionPtr++ = pswdPtr[index++ % pswdLen];
		}


		MD5AddData(&md5, pswdBuf, 64);
		count+=64;
	
	}
	MD5Calculate(&md5, md5LocalizedAuthKey);

	memcpy(pswdBuf, md5LocalizedAuthKey, 16 /*localizedAuthKey buf len*/);
	memcpy(pswdBuf+16, snmpEngineID, snmpEngnIDLength);
	memcpy(pswdBuf+16+snmpEngnIDLength, md5LocalizedAuthKey, 16 /*localizedAuthKey buf len*/);

	MD5Initialize(&md5);
	MD5AddData(&md5,pswdBuf,32+snmpEngnIDLength);
	
	MD5Calculate(&md5, md5LocalizedAuthKey);

	count+=64;

	return;
}
Exemplo n.º 4
0
UINT8* Snmpv3ComputeHmacMD5Digest(UINT8 * inData, UINT32 dataLen,UINT8* userExtendedLclzdKeyIpad,UINT8* userExtendedLclzdKeyOpad)
{
	static HASH_SUM md5;
	UINT8 * data2Hmac;
	
	data2Hmac=inData;
	
	MD5Initialize(&md5);
	MD5AddData(&md5, userExtendedLclzdKeyIpad, (WORD)0x40);
	MD5AddData(&md5, data2Hmac, (WORD)dataLen);
	MD5Calculate(&md5, HmacMd5Digest);


	
	MD5Initialize(&md5);
	MD5AddData(&md5, userExtendedLclzdKeyOpad, (WORD)0x40);
	MD5AddData(&md5, HmacMd5Digest,16);
	MD5Calculate(&md5, HmacMd5Digest);

	return HmacMd5Digest;


}
Exemplo n.º 5
0
/****************************************************************************
  Function:
	static unit_8* SNMPv3ComputeHmacMD5Digest(UINT8 * inData, UINT32 dataLen,
									     UINT8* userExtendedLclzdKeyIpad,
									     UINT8* userExtendedLclzdKeyOpad)
	
  Summary:
  	Compute HMAC - MD5 authentication code
	
  Description:
  	This routine supports data origin authentication and data integrity MD5 authentication .
  	Both iPAD and OPAD is used to calculate the authencate digest string.
  	RFC - 3414 ( section 6)
  	 		 		  	
  Precondition:
   	SNMPv3Init() and ProcessVariabels() are called.	

  Parameters:
  	digestptr - output string
	indata   - input data
	dataLen - input data length
	userExtendedLclzdKeyIpad - IPAD
	userExtendedLclzdKeyOpad - OPAD
  	  	
  Return Values:
	UINT8 *  - HMAC MD5 digest string
  Remarks:
	None 
***************************************************************************/
static uint8_t* SNMPv3ComputeHmacMD5Digest(uint8_t * inData, uint32_t dataLen,uint8_t* userExtendedLclzdKeyIpad,uint8_t* userExtendedLclzdKeyOpad)
{
	static HASH_SUM md5;
	uint8_t * data2Hmac;
	
	data2Hmac=inData;
	
	MD5Initialize(&md5);
	MD5AddData(&md5, userExtendedLclzdKeyIpad, (uint16_t)0x40);
	MD5AddData(&md5, data2Hmac, (uint16_t)dataLen);
	MD5Calculate(&md5, HmacMd5Digest);


	
	MD5Initialize(&md5);
	MD5AddData(&md5, userExtendedLclzdKeyOpad, (uint16_t)0x40);
	MD5AddData(&md5, HmacMd5Digest,16);
	MD5Calculate(&md5, HmacMd5Digest);

	return HmacMd5Digest;


}
BYTE MD5IntegrityCheck(BYTE* buffer, BYTE fileCount)
{
    BYTE operationRep = 0;
     
    //	MD5 INTEGRITY CHECK ON MEMORY
    BYTE resmd[16];
    HASH_SUM Hash;
    _dbgline("Calculating md5 from memory...");
    MD5Initialize(&Hash);
    long unsigned int f_ind = 0;
    BYTE b_read[2];
    unsigned long int md5_ind = FLASH_START_ADD;
    md5_ind += FW_SIZE*(unsigned long int)(fileCnt);
	unsigned long int stopSize = FW_SIZE;
	if(fileCount == 8) // Last file...
	{
		stopSize = (unsigned long int)FW_LAST_SIZE;
	}
	for (f_ind = 0; f_ind < stopSize; f_ind++)
	{
		vTaskSuspendAll();
		SPIFlashReadArray(md5_ind+f_ind, b_read, 1);
		xTaskResumeAll();
		HashAddData(&Hash, b_read, 1);
	}
	
    MD5Calculate(&Hash, resmd);
    BYTE i;
    char rr[3];

    _dbgline("MD5:");
    for (i=0; i<16; i++)
    {
        sprintf(rr,"%X ",resmd[i]);
        _dbgwrite(rr);
        if (resmd[i] != (BYTE) buffer[i])
        {
            operationRep = 1;
        }
    }
    return operationRep;
}
Exemplo n.º 7
0
/****************************************************************************
  Function:
	BYTE Snmpv3AuthenticateRxedPduForDataIntegrity(SNMPV3_REQUEST_WHOLEMSG* rxDataPtr)
	
  Summary:
  	Authenticate an incoming SNMPV3 USM PDU using MD5 or SHA
	
  Description:
  	This routine authenticates SNMPV3 incoming report PDU message and also for different 
  	type of GET requests with both MD5 and SHA protocol.If the received PDU username is 
  	similar to "initial", then there shoud be report PDU.
  	RFC - 3414.
  	 		 		  	
  Precondition:
   	SNMPv3Init() and ProcessVariabels() are called.	

  Parameters:
  	rxDataPtr -  incoming PDU 
  	  	
  Return Values:
	SNMPV3_MSG_AUTH_PASS  - Authentication success
	SNMPV3_MSG_AUTH_FAIL - Authentication failure

  Remarks:
	None 
***************************************************************************/
BYTE Snmpv3AuthenticateRxedPduForDataIntegrity(SNMPV3_REQUEST_WHOLEMSG* rxDataPtr)
{	
UINT8 reportMsgName[7]="initial";//respose is "report" 0xa8 msg
UINT8* secNamePtr;
UINT8 i;
WORD authParamOffset;
UINT8 hashTYpe;
static HASH_SUM md5;
UINT8* tempPtr;

	secNamePtr= securityPrimitivesOfIncomingPdu.securityName;
	hashTYpe=snmpV3UserDataBase[gSnmpv3UserDBIndex].userHashType;

	//Check if the received packet is expecting "report" as response.
	if(!strncmp((const char *)secNamePtr,
				(const char *)reportMsgName,		
				(securityPrimitivesOfIncomingPdu.securityNameLength)))
		return FALSE; //If "report" is expected, Retrun. 

	authParamOffset=gSnmpV3InPduWholeMsgBuf.msgAuthParamOffsetInWholeMsg;

	tempPtr=gSnmpV3InPduWholeMsgBuf.snmpMsgHead;
	for(i=0;i<snmpInMsgAuthParamLen /*Should be 12 Bytes*/;i++)
	{

		//RFC3414 Section 6.3.2 Page#56 Step3
		*(tempPtr+authParamOffset+i)=0x00;
	}

	if(hashTYpe == SNMPV3_HAMC_MD5)
	{

		MD5Initialize(&md5);
		MD5AddData(&md5,snmpV3UserDataBase[gSnmpv3UserDBIndex].userAuthLocalKeyHmacIpad, (WORD)0x40);
		MD5AddData(&md5, rxDataPtr->wholeMsgHead, rxDataPtr->wholeMsgLen.Val);
		MD5Calculate(&md5, HmacMd5Digest);
		
		MD5Initialize(&md5);
		MD5AddData(&md5, snmpV3UserDataBase[gSnmpv3UserDBIndex].userAuthLocalKeyHmacOpad, (WORD)0x40);
		MD5AddData(&md5, HmacMd5Digest,16);
		MD5Calculate(&md5, HmacMd5Digest);

		
	}
	else if(hashTYpe == SNMPV3_HMAC_SHA1)
	{
		SHA1Initialize(&md5);
		SHA1AddData(&md5,snmpV3UserDataBase[gSnmpv3UserDBIndex].userAuthLocalKeyHmacIpad, (WORD)0x40);
		SHA1AddData(&md5, rxDataPtr->wholeMsgHead, rxDataPtr->wholeMsgLen.Val);
		SHA1Calculate(&md5, HmacSHADigest);
		
		SHA1Initialize(&md5);
		SHA1AddData(&md5, snmpV3UserDataBase[gSnmpv3UserDBIndex].userAuthLocalKeyHmacOpad, (WORD)0x40);
		SHA1AddData(&md5, HmacSHADigest,20);
		SHA1Calculate(&md5, HmacSHADigest);
		//return TRUE;
	}
	else
		return SNMPV3_MSG_AUTH_FAIL ;

	if(hashTYpe == SNMPV3_HAMC_MD5)
	{
		i=strncmp((const char *)&snmpInMsgAuthParamStrng,(const char *)&HmacMd5Digest,12);
	}
	else if(hashTYpe == SNMPV3_HMAC_SHA1)
	{
		i=strncmp((const char *)&snmpInMsgAuthParamStrng,(const char *)&HmacSHADigest,12);
	}	
	if(i!=0)
		return SNMPV3_MSG_AUTH_FAIL;

	
	//Authparam validated on WholeMsg. Write back the auth param string to received buffer	
	tempPtr=gSnmpV3InPduWholeMsgBuf.snmpMsgHead;
	for(i=0;i<snmpInMsgAuthParamLen /*Should be 12 Bytes*/;i++)
	{
		*(tempPtr+authParamOffset+i)=snmpInMsgAuthParamStrng[i];
	}

	return SNMPV3_MSG_AUTH_PASS;
		

}
Exemplo n.º 8
0
/****************************************************************************
  Function:
	BYTE SNMPv3AuthenticateTxPduForDataIntegrity(SNMPV3_RESPONSE_WHOLEMSG* txDataPtr)
	
  Summary:
  	Authenticate to an outgoing SNMPV3 USM PDU using MD5 or SHA
	
  Description:
  	This routine authenticates SNMPV3 outgoing report PDU message and also for GET 
  	Response PDU for whole message.
  	RFC - 3414.
  	 		 		  	
  Precondition:
   	SNMPv3Init() and ProcessVariabels() are called.	

  Parameters:
  	txDataPtr -  outgoing PDU 
  	  	
  Return Values:
	SNMPV3_MSG_AUTH_PASS  - Authentication success
	SNMPV3_MSG_AUTH_FAIL - Authentication failure

  Remarks:
	None 
***************************************************************************/
uint8_t SNMPv3AuthenticateTxPduForDataIntegrity(SNMPV3_RESPONSE_WHOLEMSG* txDataPtr)
{	
uint8_t* secNamePtr;
uint8_t i;
static HASH_SUM md5;
uint8_t* tempPtr;
uint8_t hashTYpe;

SNMPV3_PROCESSING_MEM_INFO_PTRS snmpv3PktProcessingMemPntr; 
SNMPV3_STACK_DCPT_STUB * snmpv3EngnDcptMemoryStubPtr=0;		
				
	SNMPv3GetPktProcessingDynMemStubPtrs(&snmpv3PktProcessingMemPntr);
				
	snmpv3EngnDcptMemoryStubPtr=snmpv3PktProcessingMemPntr.snmpv3StkProcessingDynMemStubPtr;



	hashTYpe=snmpv3EngnDcptMemoryStubPtr->UserInfoDataBase[snmpv3EngnDcptMemoryStubPtr->UserInfoDataBaseIndx].userHashType;	

	if(hashTYpe == SNMPV3_HAMC_MD5)
	{

		MD5Initialize(&md5);
		MD5AddData(&md5,snmpv3EngnDcptMemoryStubPtr->UserInfoDataBase[snmpv3EngnDcptMemoryStubPtr->UserInfoDataBaseIndx].userAuthLocalKeyHmacIpad, (uint16_t)0x40);
		MD5AddData(&md5, txDataPtr->wholeMsgHead, txDataPtr->wholeMsgLen.Val);
		MD5Calculate(&md5, HmacMd5Digest);
		
		MD5Initialize(&md5);
		MD5AddData(&md5, snmpv3EngnDcptMemoryStubPtr->UserInfoDataBase[snmpv3EngnDcptMemoryStubPtr->UserInfoDataBaseIndx].userAuthLocalKeyHmacOpad, (uint16_t)0x40);
		MD5AddData(&md5, HmacMd5Digest,16);
		MD5Calculate(&md5, HmacMd5Digest);

		
	}
	else if(hashTYpe == SNMPV3_HMAC_SHA1)
	{
		SHA1Initialize(&md5);
		SHA1AddData(&md5,snmpv3EngnDcptMemoryStubPtr->UserInfoDataBase[snmpv3EngnDcptMemoryStubPtr->UserInfoDataBaseIndx].userAuthLocalKeyHmacIpad, (uint16_t)0x40);
		SHA1AddData(&md5, txDataPtr->wholeMsgHead, txDataPtr->wholeMsgLen.Val);
		SHA1Calculate(&md5, HmacSHADigest);
		
		SHA1Initialize(&md5);
		SHA1AddData(&md5, snmpv3EngnDcptMemoryStubPtr->UserInfoDataBase[snmpv3EngnDcptMemoryStubPtr->UserInfoDataBaseIndx].userAuthLocalKeyHmacOpad, (uint16_t)0x40);
		SHA1AddData(&md5, HmacSHADigest,20);
		SHA1Calculate(&md5, HmacSHADigest);
	
	}
	else
		return SNMPV3_MSG_AUTH_FAIL ;

	//Authparam validated on WholeMsg. Write back the auth param string to received buffer	
	tempPtr=snmpv3EngnDcptMemoryStubPtr->SnmpOutMsgAuthParaStrng;
	if(hashTYpe == SNMPV3_HAMC_MD5)
		secNamePtr=HmacMd5Digest;
	else if(hashTYpe == SNMPV3_HMAC_SHA1)
		secNamePtr=HmacSHADigest;
		

	i=0;
	for(i=0;i < 12/*SnmpOutMsgAuthParmLen Should be 12 Bytes*/;i++)
	{
		tempPtr[i]=secNamePtr[i];
	}
	return SNMPV3_MSG_AUTH_PASS;
}
Exemplo n.º 9
0
/****************************************************************************
  Function:
	BYTE SNMPv3AuthenticateRxedPduForDataIntegrity(SNMPV3_REQUEST_WHOLEMSG* rxDataPtr)
	
  Summary:
  	Authenticate an incoming SNMPV3 USM PDU using MD5 or SHA
	
  Description:
  	This routine authenticates SNMPV3 incoming report PDU message and also for different 
  	type of GET requests with both MD5 and SHA protocol.If the received PDU username is 
  	similar to "initial", then there shoud be report PDU.
  	RFC - 3414.
  	 		 		  	
  Precondition:
   	SNMPv3Init() and ProcessVariabels() are called.	

  Parameters:
  	rxDataPtr -  incoming PDU 
  	  	
  Return Values:
	SNMPV3_MSG_AUTH_PASS  - Authentication success
	SNMPV3_MSG_AUTH_FAIL - Authentication failure

  Remarks:
	None 
***************************************************************************/
uint8_t SNMPv3AuthenticateRxedPduForDataIntegrity(SNMPV3_REQUEST_WHOLEMSG* rxDataPtr)
{	
uint8_t reportMsgName[7]="initial";//respose is "report" 0xa8 msg
uint8_t* secNamePtr;
uint8_t i;
uint16_t authParamOffset;
uint8_t hashTYpe;
static HASH_SUM md5;
uint8_t* tempPtr;

	SNMPV3_PROCESSING_MEM_INFO_PTRS snmpv3PktProcessingMemPntr; 
	SNMPV3_STACK_DCPT_STUB * snmpv3EngnDcptMemoryStubPtr=0;		
					
		SNMPv3GetPktProcessingDynMemStubPtrs(&snmpv3PktProcessingMemPntr);
					
		snmpv3EngnDcptMemoryStubPtr=snmpv3PktProcessingMemPntr.snmpv3StkProcessingDynMemStubPtr;


	secNamePtr= snmpv3EngnDcptMemoryStubPtr->SecurtyPrimtvesOfIncmngPdu.securityName;
	hashTYpe=snmpv3EngnDcptMemoryStubPtr->UserInfoDataBase[snmpv3EngnDcptMemoryStubPtr->UserInfoDataBaseIndx].userHashType;

	//Check if the received packet is expecting "report" as response.
	if(!strncmp((const char *)secNamePtr,
				(const char *)reportMsgName,		
				(snmpv3EngnDcptMemoryStubPtr->SecurtyPrimtvesOfIncmngPdu.securityNameLength)))
		return false; //If "report" is expected, Retrun. 

	authParamOffset=snmpv3EngnDcptMemoryStubPtr->InPduWholeMsgBuf.msgAuthParamOffsetInWholeMsg;

	tempPtr=snmpv3EngnDcptMemoryStubPtr->InPduWholeMsgBuf.snmpMsgHead;
	for(i=0;i<snmpv3EngnDcptMemoryStubPtr->SnmpInMsgAuthParamLen /*Should be 12 Bytes*/;i++)
	{

		//RFC3414 Section 6.3.2 Page#56 Step3
		*(tempPtr+authParamOffset+i)=0x00;
	}

	if(hashTYpe == SNMPV3_HAMC_MD5)
	{

		MD5Initialize(&md5);
		MD5AddData(&md5,snmpv3EngnDcptMemoryStubPtr->UserInfoDataBase[snmpv3EngnDcptMemoryStubPtr->UserInfoDataBaseIndx].userAuthLocalKeyHmacIpad, (uint16_t)0x40);
		MD5AddData(&md5, rxDataPtr->wholeMsgHead, rxDataPtr->wholeMsgLen.Val);
		MD5Calculate(&md5, HmacMd5Digest);
		
		MD5Initialize(&md5);
		MD5AddData(&md5, snmpv3EngnDcptMemoryStubPtr->UserInfoDataBase[snmpv3EngnDcptMemoryStubPtr->UserInfoDataBaseIndx].userAuthLocalKeyHmacOpad, (uint16_t)0x40);
		MD5AddData(&md5, HmacMd5Digest,16);
		MD5Calculate(&md5, HmacMd5Digest);

		
	}
	else if(hashTYpe == SNMPV3_HMAC_SHA1)
	{
		SHA1Initialize(&md5);
		SHA1AddData(&md5,snmpv3EngnDcptMemoryStubPtr->UserInfoDataBase[snmpv3EngnDcptMemoryStubPtr->UserInfoDataBaseIndx].userAuthLocalKeyHmacIpad, (uint16_t)0x40);
		SHA1AddData(&md5, rxDataPtr->wholeMsgHead, rxDataPtr->wholeMsgLen.Val);
		SHA1Calculate(&md5, HmacSHADigest);
		
		SHA1Initialize(&md5);
		SHA1AddData(&md5, snmpv3EngnDcptMemoryStubPtr->UserInfoDataBase[snmpv3EngnDcptMemoryStubPtr->UserInfoDataBaseIndx].userAuthLocalKeyHmacOpad, (uint16_t)0x40);
		SHA1AddData(&md5, HmacSHADigest,20);
		SHA1Calculate(&md5, HmacSHADigest);
		//return true;
	}
	else
		return SNMPV3_MSG_AUTH_FAIL ;

	if(hashTYpe == SNMPV3_HAMC_MD5)
	{
		i=strncmp((const char *)&snmpv3EngnDcptMemoryStubPtr->SnmpInMsgAuthParmStrng,(const char *)&HmacMd5Digest,12);
	}
	else if(hashTYpe == SNMPV3_HMAC_SHA1)
	{
		i=strncmp((const char *)&snmpv3EngnDcptMemoryStubPtr->SnmpInMsgAuthParmStrng,(const char *)&HmacSHADigest,12);
	}	
	if(i!=0)
		return SNMPV3_MSG_AUTH_FAIL;

	
	//Authparam validated on WholeMsg. Write back the auth param string to received buffer	
	tempPtr=snmpv3EngnDcptMemoryStubPtr->InPduWholeMsgBuf.snmpMsgHead;
	for(i=0;i<snmpv3EngnDcptMemoryStubPtr->SnmpInMsgAuthParamLen /*Should be 12 Bytes*/;i++)
	{
		*(tempPtr+authParamOffset+i)=snmpv3EngnDcptMemoryStubPtr->SnmpInMsgAuthParmStrng[i];
	}

	return SNMPV3_MSG_AUTH_PASS;
		

}