fpoirotte\Cryptal\Padding\Zero Class Reference
Pads a string using NUL bytes, without ever creating a new block. More...
Inheritance diagram for fpoirotte\Cryptal\Padding\Zero:
Public Member Functions | |
| getPaddingData ($blockSize, $expectedSize) | |
| getPaddingSize ($paddedData, $blockSize) | |
Detailed Description
Pads a string using NUL bytes, without ever creating a new block.
Member Function Documentation
| fpoirotte\Cryptal\Padding\Zero::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: 
- Return values
-
string Padding data.
Implements fpoirotte\Cryptal\PaddingInterface.
| fpoirotte\Cryptal\Padding\Zero::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).
Implements fpoirotte\Cryptal\PaddingInterface.
The documentation for this class was generated from the following file:
- src/Cryptal/Padding/Zero.php
