XOR two strings Post: 302607766

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Top Forums UNIX for Dummies Questions & Answers XOR two strings Post 302607766 by drl on Thursday 15th of March 2012 09:55:14 AM

03-15-2012

Registered User

Hi.

With a perl helper:

Code:

#!/usr/bin/env bash

# @(#) s1	Demonstrate bit-string XOR, perl, with base64 encoding.

pe() { for _i;do printf "%s" "$_i";done; printf "\n"; }
pl() { pe;pe "-----" ;pe "$*"; }
db() { ( printf " db, ";for _i;do printf "%s" "$_i";done;printf "\n" ) >&2 ; }
db() { : ; }
C=$HOME/bin/context && [ -f $C ] && . $C perl base64

PASS=${1-"Password1"}

pl " Results, expecting \"Dz4sLCgwLTtu\" for \"Password1\":"

perl -e 'print '"$PASS"' ^ ( "_" x length('"$PASS"'));' |
base64

exit 0

roducing:

Code:

% ./s1

Environment: LC_ALL = C, LANG = C
(Versions displayed with local utility "version")
OS, ker|rel, machine: Linux, 2.6.26-2-amd64, x86_64
Distribution        : Debian GNU/Linux 5.0.8 (lenny) 
bash GNU bash 3.2.39
perl 5.10.0
base64 (GNU coreutils) 6.10

-----
 Results, expecting "Dz4sLCgwLTtu" for "Password1":
Dz4sLCgwLTtu

and

Code:

% ./s1 snazzy

Environment: LC_ALL = C, LANG = C
(Versions displayed with local utility "version")
OS, ker|rel, machine: Linux, 2.6.26-2-amd64, x86_64
Distribution        : Debian GNU/Linux 5.0.8 (lenny) 
bash GNU bash 3.2.39
perl 5.10.0
base64 (GNU coreutils) 6.10

-----
 Results, expecting "Dz4sLCgwLTtu" for "Password1":
LDE+JSUm

Best wishes ... cheers, drl

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drl

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strcompact

strcompact(1)						      General Commands Manual						     strcompact(1)

NAME

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SYNOPSIS

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DESCRIPTION

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       strcompact cut the size of the kernel string table by about 25%.

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       strcompact exits 0 if successful, and >0 if an error occurred.

SEE ALSO

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BUGS

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       this is only done once when the kernel is created.

       Although strcompact may be run on .o files as well as executables but this is probably not worth the trouble since the linker will not cre-
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3rd Berkeley Distribution					 January 25, 1994						     strcompact(1)

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