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# mcrypt_get_key_size

mcrypt_get_key_size -- Get the key size of the specified cipher

## Description

`int mcrypt_get_key_size`(int cipher);

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

mcrypt_get_key_size() takes one argument, the `cipher` and returns the size in bytes.

See also: mcrypt_get_block_size()

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mcrypt_get_block_size | Up | mcrypt_create_iv