Incorrect hash value (for signature) with PHP

Question

I looked at the provided PHP bindings for the REST API but I need something a little different than what it offers.  I started a PHP script that talks HTTP with our cloud provider but I'm getting an incorrect signature response. I understand how to generate the signature, but I'm getting incorrect results.  I just realized the documentation (Atmos_REST_API_Reference.pdf section 4, page 57) that we're given an example request and key and the proper results.  My code is getting a different result. My PHP version (standard PHP 5 with Ubuntu 10.04 64-bit): PHP 5.3.2-1ubuntu4.5 with Suhosin-Patch (cli) (built: Sep 17 2010 13:49:46) Copyright (c) 1997-2009 The PHP GroupZend Engine v2.3.0, Copyright (c) 1998-2010 Zend Technologies $key = 'LJLuryj6zs8ste6Y3jTGQp71xq0='; $test_headers = 'POST
';$test_headers .= 'application/octet-stream
';$test_headers .= '
';$test_headers .= 'Thu, 05 Jun 2008 16:38:19 GMT
';$test_headers .= '/rest/objects
';$test_headers .= 'x-emc-date:Thu, 05 Jun 2008 16:38:19 GMT
';$test_headers .= 'x-emc-groupacl:other=NONE
';$test_headers .= 'x-emc-listable-meta:part4/part7/part8=quick
';$test_headers .= 'x-emc-meta:part1=buy
';$test_headers .= 'x-emc-uid:6039ac182f194e15b9261d73ce044939/user1
';$test_headers .= 'x-emc-useracl:john=FULL_CONTROL,mary=WRITE
'; $hash = hash_init('sha1', HASH_HMAC, base64_decode($key));hash_update($hash, $test_headers); echo 'Hash: ' . base64_encode(hash_final($hash, true)) . '
'; ?> My resultant hash is 6Lve4+YAS0oyZZiOHG/I7NegsSI=  but the documentation said it should be WHJo1MFevMnK4jCthJ974L3YHoo= Am I missing something?

rbala1 · Accepted Answer

Hey there, The newline character for the last header needed to be removed.  The following code generates the expected hash: $key = 'LJLuryj6zs8ste6Y3jTGQp71xq0='; $test_headers = 'POST
';$test_headers .= 'application/octet-stream
';$test_headers .= '
';$test_headers .= 'Thu, 05 Jun 2008 16:38:19 GMT
';$test_headers .= '/rest/objects
';$test_headers .= 'x-emc-date:Thu, 05 Jun 2008 16:38:19 GMT
';$test_headers .= 'x-emc-groupacl:other=NONE
';$test_headers .= 'x-emc-listable-meta:part4/part7/part8=quick
';$test_headers .= 'x-emc-meta:part1=buy
';$test_headers .= 'x-emc-uid:6039ac182f194e15b9261d73ce044939/user1
';$test_headers .= 'x-emc-useracl:john=FULL_CONTROL,mary=WRITE'; $hash = hash_init('sha1', HASH_HMAC, base64_decode($key)); hash_update($hash, $test_headers); echo 'Hash: ' . base64_encode(hash_final($hash, true)) . '
'; ?> Raj

ripburn · Answer

That was such a small oversight.  Thank you.

rbala1 · Answer

No problem.  Let us know if you need any other help. Out of curiosity, why didn't the existing PHP wrapper work for you?

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