topic Re: MD5 Hash Calculation on Void transactions in Integration and Testing

MD5 Hash Calculation on Void transactions

dougvanhorn — Fri, 04 Jun 2010 17:54:25 GMT

I'm having trouble getting the MD5 hash to validate on an AIM Silent Post URL callback.

When receiving callbacks for regular transactions my hash calculation matches that passed in x_MD5_Hash. On voided transactions, the hashes do not match.

I'm using the following values when calculating my end of the hash:

md5(Salt + LoginID + x_trans_id + x_amount).hexdigest().upper()

e.g., "MySaltMyLoginID123450.00"

If x_amount is empty, I use a value of "0.00" per the documentation.

As I said, the code works fine with Auth'd/Approved transactions, but fails with Voids.

Is there a different way to calculate hashes for voids?

Re: MD5 Hash Calculation on Void transactions

Elaine — Wed, 16 Jun 2010 18:13:54 GMT

The MD5 Hash is not calculated differently when the x_type=void. The amount used when generating the MD5 hash value in our system for voided transactions is 0.00.

Thank you,

Elaine

Re: MD5 Hash Calculation on Void transactions

radzserg — Fri, 10 Jun 2011 19:07:27 GMT

I have the same problem. Very simple scenario - customer load funds from my site then admin void it from merchant area.

I get 2 responses when I create md5 hash for auth_capture response smth like

$response['x_trans_id'] = '123'

$response['x_amount'] = '20.00'

md5('myownmd5hash' . 'LoginID' . '123' . '20.00')

everything is ok, hashes are equal.

but when I do the same for void request

md5('myownmd5hash' . LoginID . '123' .'0.00')

hashes do not match.

I created a ticket in AN support center, but they said

Here in support, we can provide assistance with the Authorize.Net payment gateway account Merchant Interface. Unfortunately, we are not trained or certified developers and cannot provide scripting or coding support. However, we do offer an Integration Center with developer tools, troubleshooting suggestions, sample codes and even a developer's directory. We also provide a developer community forum for additional assistance and feedback. You can access our developer’s center at: http://community.developer.authorize.net/

Question is unsolved

Re: MD5 Hash Calculation on Void transactions

RaynorC1emen7 — Fri, 10 Jun 2011 19:49:31 GMT

virtual terminal use a different hash

http://community.developer.authorize.net/t5/Integration-and-Testing/MD5-hash-different-on-virtual-terminal-CREDIT-transactions-than/m-p/9994

Re: MD5 Hash Calculation on Void transactions

radzserg — Mon, 13 Jun 2011 14:52:09 GMT

Thanks that's help