(PHP 4 >= 4.0.2)
mcrypt_module_open -- This function opens the module of the algorithm and the mode to be
used
Description
resource mcrypt_module_open (string algorithm, string
algorithm_directory, string mode, string mode_directory)
This function opens the module of the algorithm and the mode to be used. The name of the
algorithm is specified in algorithm, eg "twofish" or is one of the MCRYPT_ciphername constants. The
library is closed by calling
mcrypt_module_close(), but there is no need to call that function if mcrypt_generic_end() is called. Normally it returns
an encryption descriptor, or FALSE on error.
The algorithm_directory and mode_directory are used to
locate the encryption modules. When you supply a directory name, it is used. When you set one of
these to the empty string (""), the value set by the mcrypt.algorithms_dir or
mcrypt.modes_dir ini-directive is used. When these are not set, the default directory
are used that are compiled in into libmcrypt (usally /usr/local/lib/libmcrypt).
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Example 1. mcrypt_module_open() Example
<?php
$td = mcrypt_module_open (MCRYPT_DES, "", MCRYPT_MODE_ECB, "/usr/lib/mcrypt-modes");
?>
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The above example will try to open the DES cipher from the default directory and the EBC
mode from the directory /usr/lib/mcrypt-modes.
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