Issues with Crypto.generateMac()

Hi,

We need to make a few callouts to a service that is using OAuth 1.0 and requires each request to be signed with HMAC-SHA1.

The service doesn't have any APEX client API. Thus, we have to do it manually.

Unfortunately,

EncodingUtil.base64Encode(Crypto.generateMac('hmacSHA1', Blob.valueOf(data), Blob.valueOf(key)));

returns a different string from what we expect. We have compared the output for the same input with libraries for other languages. And the output was different.

July 13, 2012
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Riell
I am having the same problem using Crypto.generateMac('HMACSHA256', Blob.valueOf(inputData), Blob.valueOf(AuthenticationKey)); and comparing to a .NET HMACSHA256 for the same input.