Encryption / Encoding Differences between IDE and OS X Standalone

[Jan Schenkel]

Hi Peter,

Fields are meant for the display of text, not binary data.
You could 'base64encode' the binary data before you display it.

Oh, and when treating binary data, you should the 'byte' chunk instead of the 'char' chunk.
That way when LiveCode goes all-in Unicode, your script will continuye to work.

HTH,

Jan Schenkel

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Quartam Reports & PDF Library for LiveCode
www.quartam.com

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"As we grow older, we grow both wiser and more foolish at the same time."  (La Rochefoucauld)

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On Wed, 2/19/14, Peter W A Wood <peterwawood at gmail.com> wrote:

 Subject: Encryption / Encoding Differences between IDE and OS X Standalone
 To: "How to use LiveCode" <use-livecode at lists.runrev.com>
 Date: Wednesday, February 19, 2014, 6:19 PM
 
 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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