PHP Class phpseclib\Crypt\RC2

Inheritance: extends phpseclib\Crypt\Common\BlockCipher

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Public Properties

Property	Type	Description
$block_size	integer	Block Length of the cipher
$cfb_init_len	integer	Optimizing value while CFB-encrypting
$cipher_name_mcrypt	string	The mcrypt specific name of the cipher
$current_key_length	integer	The key length in bits.
$default_key_length	integer	The key length in bits.
$invpitable	array	Inverse key expansion randomization table.
$key	string	The Key
$key_length	integer	Key Length (in bytes)
$keys	array	The Key Schedule
$orig_key	string	The Original (unpadded) Key
$pitable	array	Twice the same 256-value sequence to save a modulus in key expansion.
$skip_key_adjustment	boolean	Don't truncate / null pad key

Public Methods

Method	Description
__construct ( integer $mode )	Default Constructor.
_decryptBlock ( string $in ) : string	Decrypts a block
_encryptBlock ( string $in ) : string	Encrypts a block
_setupInlineCrypt ( )	Setup the performance-optimized function for de/encrypt()
_setupKey ( )	Creates the key schedule
_setupMcrypt ( )	Setup the \phpseclib\Crypt\Common\SymmetricKey::ENGINE_MCRYPT $engine
decrypt ( string $ciphertext ) : string	Decrypts a message.
encrypt ( string $plaintext ) : string	Encrypts a message.
getKeyLength ( ) : integer	Returns the current key length
isValidEngine ( integer $engine ) : boolean	Test for engine validity
setKey ( string $key, integer $t1 = false )	Sets the key.
setKeyLength ( integer $length )	Sets the key length.

Method Details

__construct() public method

Default Constructor.

public __construct ( integer $mode )
$mode	integer

_decryptBlock() public method

Decrypts a block

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

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

public _decryptBlock ( string $in ) : string
$in	string
return	string

_encryptBlock() public method

Encrypts a block

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

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

public _encryptBlock ( string $in ) : string
$in	string
return	string

_setupInlineCrypt() public method

Setup the performance-optimized function for de/encrypt()

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

public _setupInlineCrypt ( )

_setupKey() public method

Creates the key schedule

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

public _setupKey ( )

_setupMcrypt() public method

Setup the \phpseclib\Crypt\Common\SymmetricKey::ENGINE_MCRYPT $engine

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

public _setupMcrypt ( )

decrypt() public method

Mostly a wrapper for \phpseclib\Crypt\Common\SymmetricKey::decrypt, with some additional OpenSSL handling code

encrypt() public method

Mostly a wrapper for \phpseclib\Crypt\Common\SymmetricKey::encrypt, with some additional OpenSSL handling code

getKeyLength() public method

Returns the current key length

public getKeyLength ( ) : integer
return	integer

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 of any length. RC2, itself, uses 8 to 1024 bit keys (eg. strlen($key) <= 128), however, we only use the first 128 bytes if $key has more then 128 bytes in it, and set $key to a single null byte if it is empty.

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

public setKey ( string $key, integer $t1 = false )
$key	string
$t1	integer	optional Effective key length in bits.

setKeyLength() public method

Valid key lengths are 8 to 1024. Calling this function after setting the key has no effect until the next \phpseclib\Crypt\RC2::setKey() call.

public setKeyLength ( integer $length )
$length	integer	in bits

Property Details

$block_size public_oe property

Block Length of the cipher

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

public int $block_size
return	integer

$cfb_init_len public_oe property

Optimizing value while CFB-encrypting

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

public int $cfb_init_len
return	integer

$cipher_name_mcrypt public_oe property

The mcrypt specific name of the cipher

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

public string $cipher_name_mcrypt
return	string

$current_key_length public_oe property

The key length in bits.

See also: self::setKey()

public int $current_key_length
return	integer

$default_key_length public_oe property

The key length in bits.

See also: self::setKey()

public int $default_key_length
return	integer

$invpitable public_oe property

Inverse key expansion randomization table.

See also: self::setKey()

public array $invpitable
return	array

$key public_oe property

The Key

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

See also: self::setKey()

public string $key
return	string

$key_length public_oe property

Key Length (in bytes)

See also: phpseclib\Crypt\RC2::setKeyLength()

public int $key_length
return	integer

$keys public_oe property

The Key Schedule

$orig_key public_oe property

The Original (unpadded) Key

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

See also: self::setKey()

$pitable public_oe property

Twice the same 256-value sequence to save a modulus in key expansion.

See also: self::setKey()

public array $pitable
return	array

$skip_key_adjustment public_oe property

Don't truncate / null pad key

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

public bool $skip_key_adjustment
return	boolean

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

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