mcrypt_enc_get_iv_size

(PHP 4 >= 4.0.2, PHP 5)

mcrypt_enc_get_iv_size — Returns the size of the IV of the opened algorithm

Description

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. If it returns '0' then the IV is ignored in the algorithm. An IV is used in cbc, cfb and ofb modes, and in some algorithms in stream mode.


	PHP5中文手册 mcrypt_enc_get_block_size mcrypt_enc_get_key_size mcrypt PHP Manual mcrypt_enc_get_iv_size (PHP 4 >= 4.0.2, PHP 5) mcrypt_enc_get_iv_size — Returns the size of the IV of the opened algorithm Description 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. If it returns '0' then the IV is ignored in the algorithm. An IV is used in cbc, cfb and ofb modes, and in some algorithms in stream mode. mcrypt_enc_get_block_size mcrypt_enc_get_key_size mcrypt PHP Manual