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PHP : Function Reference : Cybercash Payment Functions : cybercash_decr

cybercash_decr

Cybercash decrypt (PHP 4 <= 4.2.3, PECL cybercash:1.18)
array cybercash_decr ( string wmk, string sk, string inbuff )

Decrypts information.

Parameters

wmk

The merchant key.

sk

The session key.

inbuff

Return Values

The function returns an associative array with the elements "errcode" and, if "errcode" is FALSE, "outbuff" (string), "outLth" (long) and "macbuff" (string).

Code Examples / Notes » cybercash_decr

scott

assuming that you have a function called "read_value_pairs" which will convert a urlencoded string into an array of values .. this should more-or-less work:
$vars = read_value_pairs($response_from_http_form_post);
$vars["message"] = cybercash_base64_decode($vars["message"]);
$vars["mac"] = cybercash_base64_decode($vars["mac"]);
$decr = cybercash_decr($merchant_key, $vars["session-key"], $vars["message"]);
if($decr["errcode"]) {
   $response["MStatus"]="failure-hard";
   $response["MErrMsg"]="error talking to server.";
} else if($decr["macbuff"] != $vars["mac"]) {
   $response["MStatus"]="failure-hard";
   $response["MErrMsg"]="signature does not match.";
} else {
   $response = read_value_pairs($decr["outbuff"]);
}


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