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=head1 Crypto handlers |
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Like with the L<database backends|database.html>, ermyth has modular crypto |
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facilities. |
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=head2 Writing a new crypto handler |
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Include the interface header |
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#include "atheme.h" |
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#include <ermyth/crypto.h> |
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Add the mandatory rcsid line |
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static char const rcsid[] = "$Id: posix.C,v 1.3 2007-07-21 13:23:20 pippijn Exp $"; |
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Define the handler |
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namespace crypto |
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{ |
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struct mycrypt : handler |
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{ |
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mycrypt () |
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{ |
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crypto_module_loaded = true; |
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} |
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virtual ~mycrypt () |
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{ |
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crypto_module_loaded = false; |
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} |
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virtual char const *crypt (char const * const key, char const * const salt); |
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}; |
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char const * |
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mycrypt::crypt (char const * const key, char const * const salt) |
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{ |
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// Our example merely reverses the string as encryption. |
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std::reverse (key, key + strlen (key)); |
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return key; |
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} |
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} // namespace crypto |
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Register the handler |
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#define FACREG_TYPE crypto::mycrypt |
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#define FACREG_TYPE_NAME "mycrypt" |
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#define FACREG_INTERFACE_TYPE crypto::handler |
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#include <ermyth/factory_reg.h> |
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=head2 Using the handler |
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Now, we can load our crypto handler with the C<crypto> configuration directive: |
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crypto "mycrypt"; |
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Encrypting a string is as simple as invoking C<< crypter->crypt ("somestring", "salt") >>. |
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Our simple crypter doesn't use the salt, it just reverses the string and |
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returns "gnirtsemos". |
