PHP Class phpseclib\Crypt\RC4

Author: Jim Wigginton ([email protected])

Inheritance: extends phpseclib\Crypt\Base

Show file Open project: phpseclib/phpseclib Class Usage Examples

Public Properties

Property	Type	Description
$block_size	integer	RC4 is a stream cipher so we the block_size to 0
$cipher_name_mcrypt	string	The mcrypt specific name of the cipher
$key	string	The Key
$key_length	integer	Key Length (in bytes)
$stream	array	The Key Stream for decryption and encryption
$use_inline_crypt	mixed	Holds whether performance-optimized $inline_crypt() can/should be used.

Public Methods

Method	Description
__construct ( ) : RC4	Default Constructor.
_crypt ( string $text, integer $mode ) : string	Encrypts or decrypts a message.
_decryptBlock ( string $in )	Decrypts a block
_encryptBlock ( string $in )	Encrypts a block
_setupKey ( )	Setup the key (expansion)
decrypt ( string $ciphertext ) : string	Decrypts a message.
encrypt ( string $plaintext ) : string	Encrypts a message.
isValidEngine ( integer $engine ) : boolean	Test for engine validity
setKey ( $key )	Sets the key length
setKeyLength ( integer $length )	Sets the key length
usesIV ( ) : boolean	RC4 does not use an IV

Method Details

__construct() public method

Default Constructor.

See also: phpseclib\Crypt\Common\SymmetricKey::__construct()

public __construct ( ) : RC4
return	RC4

_crypt() public method

Encrypts or decrypts a message.

_decryptBlock() public method

Decrypts a block

public _decryptBlock ( string $in )
$in	string

_encryptBlock() public method

Encrypts a block

public _encryptBlock ( string $in )
$in	string

_setupKey() public method

Setup the key (expansion)

See also: phpseclib\Crypt\Common\SymmetricKey::_setupKey()

public _setupKey ( )

decrypt() public method

$this->decrypt($this->encrypt($plaintext)) == $this->encrypt($this->encrypt($plaintext)). At least if the continuous buffer is disabled.

See also: phpseclib\Crypt\Common\SymmetricKey::encrypt()

encrypt() public method

Encrypts a message.

See also: phpseclib\Crypt\Common\SymmetricKey::decrypt()

isValidEngine() public method

This is mainly just a wrapper to set things up for \phpseclib\Crypt\Common\SymmetricKey::isValidEngine()

See also: phpseclib\Crypt\Common\SymmetricKey::__construct()

public isValidEngine ( integer $engine ) : boolean
$engine	integer
return	boolean

setKey() public method

Keys can be between 1 and 256 bytes long.

public setKey ( $key )

setKeyLength() public method

Keys can be between 1 and 256 bytes long.

public setKeyLength ( integer $length )
$length	integer

usesIV() public method

RC4 does not use an IV

public usesIV ( ) : boolean
return	boolean

Property Details

$block_size public property

RC4 is a stream cipher so we the block_size to 0

See also: phpseclib\Crypt\Common\SymmetricKey::block_size

public int $block_size
return	integer

$cipher_name_mcrypt public property

The mcrypt specific name of the cipher

See also: phpseclib\Crypt\Common\SymmetricKey::cipher_name_mcrypt

public string $cipher_name_mcrypt
return	string

$key public property

The Key

$key_length public property

Key Length (in bytes)

See also: phpseclib\Crypt\RC4::setKeyLength()

public int $key_length
return	integer

$stream public property

The Key Stream for decryption and encryption

$use_inline_crypt public property

Holds whether performance-optimized $inline_crypt() can/should be used.

See also: phpseclib\Crypt\Common\SymmetricKey::inline_crypt

public mixed $use_inline_crypt
return	mixed

public _crypt ( string $text, integer $mode ) : string
$text	string
$mode	integer
return	string	$text

public decrypt ( string $ciphertext ) : string
$ciphertext	string
return	string	$plaintext

public encrypt ( string $plaintext ) : string
$plaintext	string
return	string	$ciphertext