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PHP : Function Reference : Mcrypt Encryption Functions : mcrypt_get_key_size

mcrypt_get_key_size

Get the key size of the specified cipher (PHP 4, PHP 5)
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 or 2.5.x.

mcrypt_get_key_size() is used to get the size of a key of the specified cipher (in combination with an encryption mode).

This example shows how to use this function when linked against libmcrypt 2.4.x and 2.5.x. It is more useful to use the mcrypt_enc_get_key_size() function as this uses the resource returned by mcrypt_module_open().

Example 1298. mcrypt_get_block_size() example

<?php
   
echo mcrypt_get_key_size('tripledes', 'ecb');
?>

Prints:
24


See also: mcrypt_get_block_size(), mcrypt_end_get_key_size() and mcrypt_encrypt().

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mcrypt_cbc
mcrypt_cfb
mcrypt_create_iv
mcrypt_decrypt
mcrypt_ecb
mcrypt_enc_get_algorithms_name
mcrypt_enc_get_block_size
mcrypt_enc_get_iv_size
mcrypt_enc_get_key_size
mcrypt_enc_get_modes_name
mcrypt_enc_get_supported_key_sizes
mcrypt_enc_is_block_algorithm_mode
mcrypt_enc_is_block_algorithm
mcrypt_enc_is_block_mode
mcrypt_enc_self_test
mcrypt_encrypt
mcrypt_generic_deinit
mcrypt_generic_end
mcrypt_generic_init
mcrypt_generic
mcrypt_get_block_size
mcrypt_get_cipher_name
mcrypt_get_iv_size
mcrypt_get_key_size
mcrypt_list_algorithms
mcrypt_list_modes
mcrypt_module_close
mcrypt_module_get_algo_block_size
mcrypt_module_get_algo_key_size
mcrypt_module_get_supported_key_sizes
mcrypt_module_is_block_algorithm_mode
mcrypt_module_is_block_algorithm
mcrypt_module_is_block_mode
mcrypt_module_open
mcrypt_module_self_test
mcrypt_ofb
mdecrypt_generic
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