HMAC - Implementation of PHP algorithm in Objective-CI have to implement the HMAC MD5 in my iPhone app. The PHP version of the algorithm (implemented server side for verification) is here and I can't modify it (it's an API) function hmac($key, $data) { $b = 64; // byte length for md5 if (strlen($key) > $b) { $key = pack("H*",md5($key)); } $key = str_pad($key, $b, chr(0x00)); $ipad = str_pad('', $b, chr(0x36)); $opad = str_pad('', $b, chr(0x5c)); $k_
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