Mcrypt Funktionen
PHP Manual

mcrypt_enc_get_iv_size

(PHP 4 >= 4.0.2, PHP 5)

mcrypt_enc_get_iv_sizeReturns the size of the IV of the opened algorithm

Beschreibung

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.

Parameter-Liste

td

The encryption descriptor.

Rückgabewerte

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


Mcrypt Funktionen
PHP Manual