Encryption / Encoding Differences between IDE and OS X Standalone

[Bill Vlahos]

Peter,

I don’t know why it would be different in the IDE vs a standalone but I wouldn’t expect it to work correctly working with fields. There are limitations of what can be in a field.

I wrote the “Encryption Demo Stack” in RevOnLine that works both compiled and in the IDE. It puts the encrypted content into a custom property to avoid the problem you describe. You could take a look at it to see how it might be different from your stack.

I just tested it with LC 6.5.2 under 10.9.1 but it was written a long time ago so it should work fine in 10.7.

Bill Vlahos
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On Feb 19, 2014, at 6:19 PM, Peter W A Wood <peterwawood at gmail.com> wrote:

> I've written a very simple stack to encrypt or decrypt some text. There are two fields (In and Out) and two buttons (Encrypt and Decrypt). When I encrypt test in the IDE and then paste the encrypted text from the Out field to the In field and then decrypt it, I get the back the original text. But not in an OS X Standalone. From a few experiments, I suspect that the issue is related to displaying the encrypted text, probably an encoding issue.
> 
> I'm using LiveCode 6.5.2 under OS X 10.7.5
> 
> Here is my script:
> 
> local tData
> local tDisplay
> local tPassword
> local tSalt
> local tIV
> 
> on openStack
>   put the sha1Digest of "My Old Password" into tPassword
>   put "12345678" into tSalt
>   put "1234567890123456" in tIV
> end openStack
> 
> on encryptMSG
>   put Field "In" into tData
>   encrypt tData using "aes256" with password tPassword and salt tSalt and IV tIV
>   put it into tDisplay
>   delete char 1 to 16 of tDisplay
>   put tDisplay into Field "Out"
> end encryptMSG
> 
> on decryptMSG
>   put Field "In" into tData
>   decrypt tData using "aes256" with password tPassword and salt tSalt and IV tIV
>   put it into Field "Out"
> end decryptMSG
> 
> When I copy the encrypted text from the OS X standalone into a text editor (or even Mail), it displays differently (hence my suspicion that this is an encoding issue.
> 
> I appreciate any suggestions as to where I am going wrong.
> 
> Thanks
> 
> Peter 
> http://LiveCode1001.blogspot.com
> 
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