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 FileMaker Pro Custom Functions

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ChaosHash ( text ; hashLength )

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  Average rating: 4.6  (34 votes)
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Jeremy Bante,

Uses a chaotic process to create a hash of the specified length.

Sample Input:
ChaosHash ( "Some original text" ; 16 )
Sample Output:

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


ChaosHash creates a hash of the text parameter via a pseudo-chaotic process suitable for the constraints of FileMaker custom functions.

This function has not been subjected to rigorous cryptanalysis, and the author does not warranty the security or collision resistance of results.

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


"a chaotic process adapted to the constraints of FileMaker custom functions"

Adapted from ... ?

comment, VR
January 06, 2011 1:25pm

This function (along with the ChaosEncrypt and ChaosDecrypt functions) is modeled after the general pattern of a stream cipher where a chaotic process is used to generate the key stream (pad) before applying it to the plaintext. I did not try to faithfully adapt any specific existing algorithm. All the popularly discussed algorithms are optimized for manipulating binary data, which is unacceptably inefficient in a FileMaker custom function without access to native bit-wise logic operations. Hence, I use arithmetic analogues (not equivalents!). I also avoid looping subroutines as much as possible, given the limitation on FileMakers calculation stack depth.

Jeremy Bante, San Mateo, CA, USA
January 06, 2011 2:43pm

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