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06.21.2008 at 09:52PM PDT, ID: 23505319
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6.7

Mcrypt not decrypting entire credit card number occasionally - decrypts first 8 numbers

Asked by tammyf in PHP and Databases, PHP Scripting Language, MySQL Server

Tags:

We are using Mcrypt to encrypt our credit card numbers first to binary and then to hex.  The hex numbers are stored in a mySQL database.  This is fairly new and all has gone well except for one credit card number that would not decrypt.  The first eight numbers decrypted fine but the last eight look like jibberish.  Why would this not work on all numbers?  I did change the keycode and then it worked fine but the old key code worked on the rest of the numbers so I am not sure how this works.  I have attached my code.  This is done in Filemaker using a php plugin so some of the code references are for Filemaker.   Suggestions?Start Free Trial
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mcrypt function
 
[+][-]06.22.2008 at 05:42AM PDT, ID: 21840506

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[+][-]06.22.2008 at 05:57AM PDT, ID: 21840533

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[+][-]06.22.2008 at 06:02AM PDT, ID: 21840544

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[+][-]08.06.2008 at 07:03AM PDT, ID: 22170288

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Zones: PHP and Databases, PHP Scripting Language, MySQL Server
Tags: PHP
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Solution Provided By: tim_holman
Participating Experts: 2
Solution Grade: A
 
 
[+][-]08.07.2008 at 06:00AM PDT, ID: 22180453

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[+][-]08.07.2008 at 03:21PM PDT, ID: 22186054

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[+][-]08.07.2008 at 03:24PM PDT, ID: 22186079

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[+][-]08.08.2008 at 06:13AM PDT, ID: 22189523

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[+][-]08.08.2008 at 06:23AM PDT, ID: 22189593

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