mcrypt_enc_get_iv_size

(PHP 4 >= 4.0.2, PHP 5, PHP 7)

Returns the size of the IV of the opened algorithm

int mcrypt_enc_get_iv_size ( resource $td )

This function returns the size of the IV of the algorithm specified by the encryption descriptor in bytes. An IV is used in cbc, cfb and ofb modes, and in some algorithms in stream mode.

Parameters:

The encryption descriptor.

Returns:

Returns the size of the IV, or 0 if the IV is ignored by the algorithm.

Links:

http://php.net/manual/en/function.mcrypt-enc-get-iv-size.php

doc_php

2016-02-24 15:55:58

Comments

Popular Articles

mcrypt_get_iv_size (PHP 4 >= 4.0.2, PHP 5, PHP 7) Returns the size of the IV belonging to a specific cipher/mode combination

mcrypt_enc_get_block_size (PHP 4 >= 4.0.2, PHP 5, PHP 7) Returns the blocksize of the opened algorithm int mcrypt_enc_get

mcrypt_enc_get_key_size (PHP 4 >= 4.0.2, PHP 5, PHP 7) Returns the maximum supported keysize of the opened mode int mcr

mcrypt_enc_get_supported_key_sizes (PHP 4 >= 4.0.2, PHP 5, PHP 7) Returns an array with the supported keysizes of the opened algorithm

mcrypt_enc_get_modes_name (PHP 4 >= 4.0.2, PHP 5, PHP 7) Returns the name of the opened mode string mcrypt_enc_get_modes_