License	BSD-style
Maintainer	Vincent Hanquez <vincent@snarc.org>
Stability	stable
Portability	Good
Safe Haskell	None
Language	Haskell2010

Crypto.Cipher.RC4

Description

Simple implementation of the RC4 stream cipher. http://en.wikipedia.org/wiki/RC4

Initial FFI implementation by Peter White peter@janrain.com

Reorganized and simplified to have an opaque context.

Synopsis

initialize :: ByteArrayAccess key => key -> State
combine :: ByteArray ba => State -> ba -> (State, ba)
generate :: ByteArray ba => State -> Int -> (State, ba)
data State

Documentation

initialize #

Arguments

:: ByteArrayAccess key
=> key	The key
-> State	The RC4 context with the key mixed in

RC4 context initialization.

seed the context with an initial key. the key size need to be adequate otherwise security takes a hit.

combine #

Arguments

:: ByteArray ba
=> State	rc4 context
-> ba	input
-> (State, ba)	new rc4 context, and the output

RC4 xor combination of the rc4 stream with an input

generate :: ByteArray ba => State -> Int -> (State, ba) #

generate the next len bytes of the rc4 stream without combining it to anything.

data State #

The encryption state for RC4

This type is an instance of ByteArrayAccess for debugging purpose. Internal layout is architecture dependent, may contain uninitialized data fragments, and change in future versions. The bytearray should not be used as input to cryptographic algorithms.

Instances

Instances details

NFData State #
Instance details Defined in Crypto.Cipher.RC4 Methods rnf :: State -> () #
ByteArrayAccess State #
Instance details Defined in Crypto.Cipher.RC4 Methods length :: State -> Int # withByteArray :: State -> (Ptr p -> IO a) -> IO a # copyByteArrayToPtr :: State -> Ptr p -> IO () #