(3.0.8 - 3.0.18 only, PHP 4 >= 4.0.0)

mcrypt_get_key_size -- Get the key size of the specified cipher


int mcrypt_get_key_size (int cipher)

int mcrypt_get_key_size (string cipher, string module)

The first prototype is when linked against libmcrypt 2.2.x, the second when linked against libmcrypt 2.4.x.

mcrypt_get_key_size() is used to get the size of a key of the specified cipher.

mcrypt_get_key_size() takes one or two arguments, the cipher and module, and returns the size in bytes.

See also: mcrypt_get_block_size().