1) This is not the sort of "scripting language" that was being discussed. What was proposed was a system in which one could combine primitive operations to perform various kinds of cryptography. As an example, one could say something like "take a block of text, MD5 hash it, take the hash, and raise this other number to the hash value modulo this other prime number". What you are showing is a piss-poor shell scripting language. 2) Until such time as Dolphin Encrypt's algorithm is subjected to real analysis, it must be assumed to be a useless piece of garbage. Perry Peter Davidson says:
Date: Wed, 27 Apr 1994 09:00:10 -0700 From: Hal <hfinney@shell.portal.com> To: cypherpunks@toad.com Subject: Re: Crypto scripting language
From: peace@BIX.com
I wrote a cryptographic scripting language that has been implemented in a commercial product. [...]
I'd like to hear more about your scripting language. [...] In the mean time, perhaps you could describe the language here. What is its syntax like? Interpreted or compiled? What kind of special crypto support does it have?
[...] Hal
Well, I don't know anything about peace@BIX.com's crypto scripting language but according to my manual for Dolphin Encrypt Advanced Version (a different product from DE) the program supports a script language. It's an interpreted language. It's explained in an 11-page appendix in the manual. From a quick perusal: The script is contained in a textfile. You run DE with a command like DE2 @XXX.SCR and it reads XXX.SCR and interprets the commands. Apparently the script language is designed only for use with the Dolphin Encrypt program itself (so you can't use it to encrypt with DES, etc.).
I don't have much use for scripting crypto applications myself (though if there were lots of encryption/decryption to be done daily I could see a use), so I can't post any that I've written for my own use only, but here's two of the sample scripts from the DEAV disk:
#TEST2.SCR #Script for testing Dolphin Encrypt #Last mod.: 1992-05-02
if not there_are_any C:\TEMP\*.TXT output: output: There are no C:\TEMP\*.TXT else encrypt C:\TEMP\*.TXT C:\TEMP\*.ENC /c /b8 if exit_status = 0 decrypt C:\TEMP\*.ENC C:\TEMP\*.DEC /b- if exit_status = 0 run DCOMPARE C:\TEMP\*.TXT C:\TEMP\*.DEC if exit_status = 0 output: File comparisons OK else output: File comparison error! endif endif endif endif
// VIEWENC.SCR // A script for decrypting and viewing text files in the current directory // which have been encrypted as files with extension .ENC. // No input parameters required // Use: DE2 @VIEWENC.SCR // Last modified: 1993-03-25
set escape on // Allow termination from script // by pressing the Escape key. output // Print a blank line decrypt *.ENC *.DEC // Decrypt the .ENC file(s) if not successful // Check if decryption successful. output: Decryption error! // Print message if not. else // Otherwise: beep // Pause so that user can wait: Press a key ... // verify successful decryption. save screen // Save the video screen. DFR *.DEC // View the plaintext files using DFR restore screen // Restore the video screen. beep // Get the user's attention. output // output a blank line output: Decrypted plaintext files: DIR *.DEC /w // Show decrypted files on disk. output // output a blank line ask: Purge decrypted file(s)? if answer = Y purge *.DEC /d // /d means display file names. if not successful // If error occurred beep // attract user's attention wait // and wait for a keypress. endif endif if printer // If output redirected to printer eject // issue a formfeed. endif endif
Lessee now ... for those interested, Dolphin Software's address is ... got it right here ... 48 Shattuck Square #147, Berkeley, CA 94704.