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.Dd May 23, 2012
.Dt TRANSFORMER 1
.Os "Network Reverse Engineering Toolkit" 1.1337
.
.Sh NAME
.Nm xor
.Nd apply bytes to the pipeline using XOR
.br
.Nm rot
.Nd apply bytes to the pipeline using ROT
.br
.Nm rol
.Nd apply bytes to the pipeline using ROL
.br
.Nm caesar
.Nd apply bytes to the pipeline using Caesar's Cipher
.
.Sh SYNOPSIS
.Nm <transform>
.Op Fl h | Fl v
.Nm <transform>
.Op Fl u
.Op Fl x
.Ar BYTE
.Op Ar ...
.Nm <transform>
.Op Fl u
.Fl s
.Ar STRING
.
.Sh DESCRIPTION
The basic concept for this utility is to apply a set of bytes, repeatedly, to a
stream of input.
.Pp
The available options include:
.Pp
.Bl -tag -compact -width "-s STRING"
.It Fl h
usage information
.It Fl v
the program's version
.It Fl x
explicity interpret bytes as hexadecimal digits
.It Fl s Ar STRING
use a string of characters as the byte source
.It Fl u
undo - reverse the transform
.Pq this is ignored for Nm xor
.It Ar BYTE Op Ar ...
a list of bytes to apply to the input stream
.El
.
.Sh IMPLEMENTATION NOTES
The application of the key bytes is accomplished using one of the following
transforms:
.
.Bd -unfilled -offset left
.TS
box tab(:);
l | l | l | l | l.
\fBName:Description:Subj:Argument:Undo\fR
_:_:_:_:_
xor:bitwise exclusive OR:bytes:int [0-255]:N/A
rot:rotate left:bits:int [0-7]:rotate right
rol:rotate (-):bytes:int [0-255]:rotate (+)
caesar:shift (+):alpha:int [0-26]:shift (-)
.TE
.Ed
.
.Sh EXAMPLES
As a filter with the hexadecimal bytes
.Bq 0x20 , 0x2f
applied to the input stream using
.Nm xor .
The bytes are applied repeatedly until the end-of-file
.Pq i.e. Bo 0x20 , 0x2f , 0x20 , 0x2f , ...  Bc .
.D1 Ic $ No ... | Nm xor Fl x Ar 20 Ar 2f | No ...
.Pp
As a filter with a string of characters used as a byte source
.Pq i.e. Qo key Qc becomes Bo 0x6b , 0x65 , 0x79 , ... Bc .
.D1 Ic $ No ... | Nm xor Fl s Qo Ar key Qc | No ...
.
.Sh SEE ALSO
.Xr hdng 1 ,
.Xr unhex 1
.
.Sh AUTHORS
.An Zephyr Aq Ad zephyr@dirtbags.net ,
.An pi-rho Aq Ad pi-rho@tyr.cx
.
.Sh BUGS
Bugs may be submitted at
.Aq Ad https://bugs.launchpad.net/netre-tools