GoLang mcrypt_enc_get_iv_size

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PHP mcrypt_enc_get_iv_size

PHP original manual for mcrypt_enc_get_iv_size [ show | php.net ]


(PHP 4 >= 4.0.2, PHP 5, PHP 7 < 7.2.0, PECL mcrypt >= 1.0.0)

mcrypt_enc_get_iv_sizeReturns the size of the IV of the opened algorithm


This function has been DEPRECATED as of PHP 7.1.0. Relying on this function is highly discouraged.


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.



The encryption descriptor.

Return Values

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