How to create a HmacSHA256 hash in Salesforce to match external service

Hi guys,

I have created Rest API to integrate Salesforce with banking system.
I am facing problem with HmacSha256 encryption. I am using as below:

Blob blobSign = Crypto.generateMac('Hmac-SHA256', Blob.valueOf(privKey + xmlOutput.length() + unixTime));
String HMACKey = EncodingUtil.base64Encode(blobSign);

I am getting error 403.

Any one know how to connect external system.

Thanks in advance.

February 14, 2016
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gyani19901.3956550919266765E12
Hi UserSf,

Please use the below code for your problem.

Blob hash = Crypto.generateDigest('MD5', targetBlob); string payload_md5 = EncodingUtil.base64Encode(hash); String salt = payload_md5+',/api/salesforce/xml'; String key = 'rc!&x1_s=-ve-vlcr&h_!t8n^3ar$+8b3ynhfo9v^)dw1+c5xh'; system.debug('******key******'+key); Blob data = crypto.generateMac('HmacSHA256',Blob.valueOf(salt), Blob.valueOf(key)); string signature = EncodingUtil.base64Encode(data);

Thanks
Gyani
http://www.mirketa.com

February 14, 2016
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usersfdc21
Hi Gyani,

Thank you very much for replying me.

I tried it but unable to connect to external system. can I have your email Id ?

February 15, 2016
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usersfdc21
Hi Gyani,

I am still facing 403 error for the below code:

DateTime dateTimeNow = dateTime.now();
String unixTime = ''+dateTimeNow.getTime()/1000;
String data = '<LoanApplication><LoanId>10</LoanId><LoanReference>APP123456</LoanReference></LoanApplication>';

String privKey = 'privkeyabc';
String publicKey = 'publickeyabc';
String responseBody;

blob blobSign = Crypto.generateDigest('SHA256', Blob.valueOf(privKey + data + unixTime));
String HMACKey = EncodingUtil.base64Encode(blobSign);

String endpoint='https://api-test.abc.com.au/abc/new/';

HttpRequest request = new HttpRequest();

request.setMethod('POST');
request.setEndpoint(endpoint);
request.setHeader('Content-Type', 'application/xml');
request.setHeader('API-KEY',publicKey);
request.setHeader('API-HMAC',HMACKey );
request.setHeader('API-Timestamp',unixTime);
request.setBody(data);
System.debug('@@@XML Output'+data);

  Http http = new Http();
HttpResponse response = http.send(request);
responseBody = response.getBody();
System.debug('@@@Response:'+ Response);
System.debug('@@@Response Body:'+ ResponseBody);
System.debug('@@@time: '+unixTime);
System.debug('@@@HMACKey: '+ HMACKey);
System.debug('@@@BlobSign: ' + blobSign);
System.debug('@@@Data Length: ' + data.Length());