OK_Decrypt ( Text ; Key )
Decrypt data encrypted with OK_Encrypt CF
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|Peter Vinogradov - Show more from this author|
Function definition: (Copy & paste into FileMaker's Edit Custom Function window)
Decrypts text encrypted with the "OK_Encrypt" CF
Aug 23, 2014
|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?|
Aug 25, 2014
|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.
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