rc4

Documentation

Overview

This package implements RC4 encryption, as defined in Bruce Schneier's Applied Cryptography.

Index

• type Cipher
  • func NewCipher(key []byte) (*Cipher, os.Error)
  • func (c *Cipher) Reset()
  • func (c *Cipher) XORKeyStream(buf []byte)
• type KeySizeError
  • func (k KeySizeError) String() string
• Bugs

Types

type Cipher

type Cipher struct {
	// contains filtered or unexported fields
}

A Cipher is an instance of RC4 using a particular key.

func NewCipher

func NewCipher(key []byte) (*Cipher, os.Error)

NewCipher creates and returns a new Cipher. The key argument should be the RC4 key, at least 1 byte and at most 256 bytes.

func (*Cipher) Reset

func (c *Cipher) Reset()

Reset zeros the key data so that it will no longer appear in the process's memory.

func (*Cipher) XORKeyStream

func (c *Cipher) XORKeyStream(buf []byte)

XORKeyStream will XOR each byte of the given buffer with a byte of the generated keystream.

type KeySizeError

type KeySizeError int

func (KeySizeError) String

func (k KeySizeError) String() string

Notes

Bugs

• RC4 is in common use but has design weaknesses that make it a poor choice for new protocols.