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 FileMaker Pro Custom Functions

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OK_Decrypt (Text ; Key )

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  Average rating: 4.6  (32 votes)
  Discuss this Custom Function

Peter Vinogradov, Peter Vinogradov Consulting

Decrypt data encrypted with OK_Encrypt CF

Sample Input:
OK_Decrypt ( "ÔÛÐÑ" ; "Goodbye")
Sample Output:

 Then copy & paste into FileMaker Advanced's Edit Custom Function window.


Decrypts text encrypted with the "OK_Encrypt" CF

Note: these functions are not guaranteed or supported by Please contact the individual developer with any questions or problems.

This is my Custom Function and I want to edit it


Strange... the Encrypt half of the function seems identical to this even to having the Decrypt comments... Does that mean we only need one function to do both, encrypt and decrypt?

Charles, Elberton
August 23, 2014 9:53pm

Yep, they've essentially the same function, except in the Decrypt version you subtract the key letter from the ciphertext, and in the Encrypt version you add the keyletter to the ciphertext.

v = Char ( Code ( Left ( text ; 1 ) ) - Code (Middle (key ; i;1) ) );
v = Char ( Code ( Left ( text ; 1 ) ) + Code (Middle (key ; i;1) ) );

But you're right, I didn't change it in the comment text - sloppy of me. I've fixed it now.

Peter Vinogradov, Saugerties NY
August 25, 2014 3:47pm

Make a comment about this Custom Function (please try to keep it brief & to the point). Anyone can post:

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