fpoirotte\Cryptal\Modes\OCB Class Reference

Inheritance diagram for fpoirotte\Cryptal\Modes\OCB:

Public Member Functions
	__construct (CryptoInterface $cipher, $iv, $tagLength)
	decrypt ($data, $context)
	encrypt ($data, $context)

Protected Member Functions
	hash ($A)

Static Protected Member Functions
static	ntz ($n)

Protected Attributes
	$cipher
	Approved block cipher with a 128-bit block size.
	$iv
	Initialization Vector.
	$key
	Secret key.
	$taglen
	Output tag length (in bytes)

Detailed Description

Offset Codebook (OCB) mode

Note

Even though OCB was carefully designed to work with arbitrary bitstrings, this implementation only supports bytestrings, that is, strings whose length is a multiple of 8 bits.

Definition at line 16 of file OCB.php.

Constructor & Destructor Documentation

fpoirotte\Cryptal\Modes\OCB::__construct	(	CryptoInterface	$impl,
			$iv,
			$tagLength
	)

Construct an encryption/decryption mode of operations.

Parameters

CryptoInterface	$impl	Cryptographic implementation.
string	$iv	Initialization Vector for the cipher.
int	$tagLength	Length (in bytes) of the tags to generate (AEAD only).

Implements fpoirotte\Cryptal\SymmetricModeInterface.

Definition at line 30 of file OCB.php.

References fpoirotte\Cryptal\Modes\OCB\$cipher, fpoirotte\Cryptal\Modes\OCB\$iv, and fpoirotte\Cryptal\Implementers\CryptoInterface\getBlockSize().

Member Function Documentation

fpoirotte\Cryptal\Modes\OCB::decrypt	(		$data,
			$context
	)

Decrypt some data.

Parameters

string	$data	Data to decrypt.
resource	$context	Stream context for the operation.

Implements fpoirotte\Cryptal\AsymmetricModeInterface.

Definition at line 117 of file OCB.php.

fpoirotte\Cryptal\Modes\OCB::encrypt	(		$data,
			$context
	)

Encrypt some data.

Parameters

string	$data	Data to encrypt.
resource	$context	Stream context for the operation.

Implements fpoirotte\Cryptal\SymmetricModeInterface.

Definition at line 76 of file OCB.php.

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The documentation for this class was generated from the following file:

• src/Cryptal/Modes/OCB.php