Pads a string using the scheme defined in ISO/IEC 7816-4. More...

Inheritance diagram for fpoirotte\Cryptal\Padding\IsoIec7816:

Public Member Functions
	getPaddingData ($blockSize, $expectedSize)

	getPaddingSize ($paddedData, $blockSize)

Detailed Description

Pads a string using the scheme defined in ISO/IEC 7816-4.

Definition at line 8 of file IsoIec7816.php.

Member Function Documentation

fpoirotte\Cryptal\Padding\IsoIec7816::getPaddingData	(	$blockSize,
		$expectedSize
	)

Return padding data to form a complete block.

Parameters

int	$blockSize	The cipher's block size, in bytes.
int	$expectedSize	The padding's expected size (in bytes) to form a (possibly new) complete block. This value is always such that: $0 < \$expectedSize <= \$blockSize$

Return values

string Padding data.

Definition at line 10 of file IsoIec7816.php.

fpoirotte\Cryptal\Padding\IsoIec7816::getPaddingSize	(	$paddedData,
		$blockSize
	)

Return the size (in bytes) of the padding in some already-padded data.

Parameters

string	$paddedData	The padded data to analyze.
int	$blockSize	The cipher's block size, in bytes.

Exceptions

Exception An exception is thrown when the supplied data is invalid (was not padded using the currently-selected scheme).

Warning: Some padding schemes can generate ambiguous data, resulting in possible data loss while removing the padding. This method suffers from the same shortcomings. If possible, you should not rely on this method to determine the plaintext's length. Instead, you should retrieve it using other means (eg. out-of-band communications).

Definition at line 15 of file IsoIec7816.php.

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