Crypto.Cipher.RC4

Simple implementation of the RC4 stream cipher. http:en.wikipedia.orgwikiRC4

Initial FFI implementation by Peter White [e-mail]

Reorganized and simplified to have an opaque context.

Documentation

data RC4

RC4 Stream cipher

Instances

Byteable RC4

Cipher RC4

StreamCipher RC4

deprecated types

newtype Ctx

The encryption context for RC4

Constructors

Ctx ByteString

Instances

Show Ctx

deprecated functions, use crypto-cipher-types StreamCipher function

initCtx

Arguments

:: ByteString

The key

-> Ctx

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.

generate :: Ctx -> Int -> (Ctx, ByteString)

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

combine

Arguments

:: Ctx

rc4 context

-> ByteString

input

-> (Ctx, ByteString)

new rc4 context, and the output

RC4 xor combination of the rc4 stream with an input

encrypt :: Ctx -> ByteString -> (Ctx, ByteString)

Deprecated: use combine instead

decrypt :: Ctx -> ByteString -> (Ctx, ByteString)

Deprecated: use combine instead