340 lines
13 KiB
C
340 lines
13 KiB
C
/*
|
|
* Copyright (C) 2011 Martin Willi
|
|
* Copyright (C) 2011 revosec AG
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the
|
|
* Free Software Foundation; either version 2 of the License, or (at your
|
|
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
|
|
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
|
* for more details.
|
|
*/
|
|
|
|
/**
|
|
* @defgroup plugin_feature plugin_feature
|
|
* @{ @ingroup plugins
|
|
*/
|
|
|
|
#ifndef PLUGIN_FEATURE_H_
|
|
#define PLUGIN_FEATURE_H_
|
|
|
|
typedef struct plugin_feature_t plugin_feature_t;
|
|
|
|
#include <library.h>
|
|
#include <eap/eap.h>
|
|
#include <plugins/plugin.h>
|
|
|
|
/**
|
|
* Callback function of a plugin to (un-)register a specified feature.
|
|
*
|
|
* @param plugin plugin instance
|
|
* @param feature feature to register
|
|
* @param reg TRUE to register, FALSE to unregister
|
|
* @param cb_data user data passed with callback function
|
|
* @return TRUE if registered successfully
|
|
*/
|
|
typedef bool (*plugin_feature_callback_t)(plugin_t *plugin,
|
|
plugin_feature_t *feature,
|
|
bool reg,void *cb_data);
|
|
|
|
/**
|
|
* Feature a plugin provides or depends on, including registration functions.
|
|
*
|
|
* Each plugin returns a list of plugin features, allowing the plugin loader
|
|
* to resolve dependencies and register the feature. FEATURE_PROVIDE defines
|
|
* features provided by the plugin, hard (DEPENDS) or soft (SDEPEND) dependency
|
|
* specified is related to the previously defined PROVIDE feature.
|
|
* If a plugin feature requires to hook in functionality into the library
|
|
* or a daemon, it can use REGISTER or CALLBACK entries. Each PROVIDED feature
|
|
* uses the REGISTER/CALLBACK entry defined previously. The REGISTER entry
|
|
* defines a common feature registration function directly passed to the
|
|
* associated manager or factory (crypto/credential factory etc.). A callback
|
|
* function is more generic allows the loader to invoke a callback to do
|
|
* the registration.
|
|
*
|
|
* To conviently create feature lists, use the four macros PLUGIN_REGISTER,
|
|
* PLUGIN_CALLBACK, PLUGIN_PROVIDE, PLUGIN_DEPENDS and PLUGIN_SDEPEND. Use
|
|
* identation to show how the registration functions and dependencies are
|
|
* related to a provided feature, such as:
|
|
*
|
|
* @verbatim
|
|
// two features, one with two dependencies, both use a callback to register
|
|
PLUGIN_CALLBACK(...),
|
|
PLUGIN_PROVIDE(...),
|
|
PLUGIN_DEPENDS(...),
|
|
PLUGIN_SDEPEND(...),
|
|
PLUGIN_PROVIDE(...),
|
|
// common constructor to register for a feature with one dependency
|
|
PLUGIN_REGISTER(...),
|
|
PLUGIN_PROVIDE(...),
|
|
PLUGIN_DEPENDS(...),
|
|
// feature that does not use a registration function
|
|
PLUGIN_PROVIDE(...),
|
|
@endverbatim
|
|
*/
|
|
struct plugin_feature_t {
|
|
/** kind of entry */
|
|
enum {
|
|
/* plugin provides this feature */
|
|
FEATURE_PROVIDE,
|
|
/* a feature depends on this feature, hard dependency */
|
|
FEATURE_DEPENDS,
|
|
/* a feature can optionally use this feature, soft dependency */
|
|
FEATURE_SDEPEND,
|
|
/* register the specified function for all following features */
|
|
FEATURE_REGISTER,
|
|
/* use a callback to register all following features */
|
|
FEATURE_CALLBACK,
|
|
} kind;
|
|
/* type of feature */
|
|
enum {
|
|
/** not a feature */
|
|
FEATURE_NONE,
|
|
/** crypter_t */
|
|
FEATURE_CRYPTER,
|
|
/** aead_t */
|
|
FEATURE_AEAD,
|
|
/** signer_t */
|
|
FEATURE_SIGNER,
|
|
/** hasher_t */
|
|
FEATURE_HASHER,
|
|
/** prf_t */
|
|
FEATURE_PRF,
|
|
/** diffie_hellman_t */
|
|
FEATURE_DH,
|
|
/** rng_t */
|
|
FEATURE_RNG,
|
|
/** generic private key support */
|
|
FEATURE_PRIVKEY,
|
|
/** generating new private keys */
|
|
FEATURE_PRIVKEY_GEN,
|
|
/** private_key_t->sign() */
|
|
FEATURE_PRIVKEY_SIGN,
|
|
/** private_key_t->decrypt() */
|
|
FEATURE_PRIVKEY_DECRYPT,
|
|
/** generic public key support */
|
|
FEATURE_PUBKEY,
|
|
/** public_key_t->verify() */
|
|
FEATURE_PUBKEY_VERIFY,
|
|
/** public_key_t->encrypt() */
|
|
FEATURE_PUBKEY_ENCRYPT,
|
|
/** parsing certificates */
|
|
FEATURE_CERT_DECODE,
|
|
/** generating certificates */
|
|
FEATURE_CERT_ENCODE,
|
|
/** EAP server implementation */
|
|
FEATURE_EAP_SERVER,
|
|
/** EAP peer implementation */
|
|
FEATURE_EAP_PEER,
|
|
/** XAuth server implementation */
|
|
FEATURE_XAUTH_SERVER,
|
|
/** XAuth peer implementation */
|
|
FEATURE_XAUTH_PEER,
|
|
/** database_t */
|
|
FEATURE_DATABASE,
|
|
/** fetcher_t */
|
|
FEATURE_FETCHER,
|
|
/** custom feature, described with a string */
|
|
FEATURE_CUSTOM,
|
|
} type;
|
|
/** More specific data for each type */
|
|
union {
|
|
/** FEATURE_CRYPTER */
|
|
struct {
|
|
encryption_algorithm_t alg;
|
|
size_t key_size;
|
|
} crypter;
|
|
/** FEATURE_AEAD */
|
|
struct {
|
|
encryption_algorithm_t alg;
|
|
size_t key_size;
|
|
} aead;
|
|
/** FEATURE_SIGNER */
|
|
integrity_algorithm_t signer;
|
|
/** FEATURE_PRF */
|
|
pseudo_random_function_t prf;
|
|
/** FEATURE_HASHER */
|
|
hash_algorithm_t hasher;
|
|
/** FEATURE_DH */
|
|
diffie_hellman_group_t dh_group;
|
|
/** FEATURE_RNG */
|
|
rng_quality_t rng_quality;
|
|
/** FEATURE_PRIVKEY */
|
|
key_type_t privkey;
|
|
/** FEATURE_PRIVKEY_GEN */
|
|
key_type_t privkey_gen;
|
|
/** FEATURE_PRIVKEY_SIGN */
|
|
signature_scheme_t privkey_sign;
|
|
/** FEATURE_PRIVKEY_DECRYPT */
|
|
encryption_scheme_t privkey_decrypt;
|
|
/** FEATURE_PUBKEY */
|
|
key_type_t pubkey;
|
|
/** FEATURE_PUBKEY_VERIFY */
|
|
signature_scheme_t pubkey_verify;
|
|
/** FEATURE_PUBKEY_ENCRYPT */
|
|
encryption_scheme_t pubkey_encrypt;
|
|
/** FEATURE_CERT_DECODE/ENCODE */
|
|
certificate_type_t cert;
|
|
/** FEATURE_EAP_SERVER/CLIENT */
|
|
eap_type_t eap;
|
|
/** FEATURE_DATABASE */
|
|
db_driver_t database;
|
|
/** FEATURE_FETCHER */
|
|
char *fetcher;
|
|
/** FEATURE_CUSTOM */
|
|
char *custom;
|
|
/** FEATURE_XAUTH_SERVER/CLIENT */
|
|
char *xauth;
|
|
|
|
/** FEATURE_REGISTER */
|
|
struct {
|
|
/** final flag to pass for builder_function_t */
|
|
bool final;
|
|
/** feature specific function to register for this type */
|
|
void *f;
|
|
} reg;
|
|
|
|
/** FEATURE_CALLBACK */
|
|
struct {
|
|
/** callback function to invoke for registration */
|
|
plugin_feature_callback_t f;
|
|
/** data to pass to callback */
|
|
void *data;
|
|
} cb;
|
|
} arg;
|
|
};
|
|
|
|
#define FEATURE(kind, type, ...) _PLUGIN_FEATURE_##type(kind, __VA_ARGS__)
|
|
|
|
/**
|
|
* Define function to register directly for all upcoming features.
|
|
*
|
|
* @param type feature type to register
|
|
* @param f type specific function to register
|
|
* @param ... type specific additional arguments
|
|
*/
|
|
#define PLUGIN_REGISTER(type, f, ...) _PLUGIN_FEATURE_REGISTER_##type(type, f, ##__VA_ARGS__)
|
|
|
|
/**
|
|
* Define a callback to invoke for registering all upcoming features.
|
|
*
|
|
* @param cb type specific callback function to register
|
|
* @param data data pointer to pass to callback
|
|
*/
|
|
#define PLUGIN_CALLBACK(cb, data) _PLUGIN_FEATURE_CALLBACK(cb, data)
|
|
|
|
/**
|
|
* Define a feature the plugin provides.
|
|
*
|
|
* @param type feature type to provide
|
|
* @param ... type specific arguments
|
|
*/
|
|
#define PLUGIN_PROVIDE(type, ...) _PLUGIN_FEATURE_##type(PROVIDE, __VA_ARGS__)
|
|
|
|
/**
|
|
* Define a hard dependency for the previously defined feature.
|
|
*
|
|
* @param type feature type to provide
|
|
* @param ... type specific arguments
|
|
*/
|
|
#define PLUGIN_DEPENDS(type, ...) _PLUGIN_FEATURE_##type(DEPENDS, __VA_ARGS__)
|
|
|
|
/**
|
|
* Define a soft dependency for the previously defined feature.
|
|
*
|
|
* @param type feature type to provide
|
|
* @param ... type specific arguments
|
|
*/
|
|
#define PLUGIN_SDEPEND(type, ...) _PLUGIN_FEATURE_##type(SDEPEND, __VA_ARGS__)
|
|
|
|
#define __PLUGIN_FEATURE(kind, type, ...) (plugin_feature_t){ FEATURE_##kind, FEATURE_##type, { __VA_ARGS__ }}
|
|
#define _PLUGIN_FEATURE_CRYPTER(kind, alg, size) __PLUGIN_FEATURE(kind, CRYPTER, .crypter = { alg, size })
|
|
#define _PLUGIN_FEATURE_AEAD(kind, alg, size) __PLUGIN_FEATURE(kind, AEAD, .aead = { alg, size })
|
|
#define _PLUGIN_FEATURE_SIGNER(kind, alg) __PLUGIN_FEATURE(kind, SIGNER, .signer = alg)
|
|
#define _PLUGIN_FEATURE_HASHER(kind, alg) __PLUGIN_FEATURE(kind, HASHER, .hasher = alg)
|
|
#define _PLUGIN_FEATURE_PRF(kind, alg) __PLUGIN_FEATURE(kind, PRF, .prf = alg)
|
|
#define _PLUGIN_FEATURE_DH(kind, group) __PLUGIN_FEATURE(kind, DH, .dh_group = group)
|
|
#define _PLUGIN_FEATURE_RNG(kind, quality) __PLUGIN_FEATURE(kind, RNG, .rng_quality = quality)
|
|
#define _PLUGIN_FEATURE_PRIVKEY(kind, type) __PLUGIN_FEATURE(kind, PRIVKEY, .privkey = type)
|
|
#define _PLUGIN_FEATURE_PRIVKEY_GEN(kind, type) __PLUGIN_FEATURE(kind, PRIVKEY_GEN, .privkey_gen = type)
|
|
#define _PLUGIN_FEATURE_PRIVKEY_SIGN(kind, scheme) __PLUGIN_FEATURE(kind, PRIVKEY_SIGN, .privkey_sign = scheme)
|
|
#define _PLUGIN_FEATURE_PRIVKEY_DECRYPT(kind, scheme) __PLUGIN_FEATURE(kind, PRIVKEY_DECRYPT, .privkey_decrypt = scheme)
|
|
#define _PLUGIN_FEATURE_PUBKEY(kind, type) __PLUGIN_FEATURE(kind, PUBKEY, .pubkey = type)
|
|
#define _PLUGIN_FEATURE_PUBKEY_VERIFY(kind, scheme) __PLUGIN_FEATURE(kind, PUBKEY_VERIFY, .pubkey_verify = scheme)
|
|
#define _PLUGIN_FEATURE_PUBKEY_ENCRYPT(kind, scheme) __PLUGIN_FEATURE(kind, PUBKEY_ENCRYPT, .pubkey_encrypt = scheme)
|
|
#define _PLUGIN_FEATURE_CERT_DECODE(kind, type) __PLUGIN_FEATURE(kind, CERT_DECODE, .cert = type)
|
|
#define _PLUGIN_FEATURE_CERT_ENCODE(kind, type) __PLUGIN_FEATURE(kind, CERT_ENCODE, .cert = type)
|
|
#define _PLUGIN_FEATURE_EAP_SERVER(kind, type) __PLUGIN_FEATURE(kind, EAP_SERVER, .eap = type)
|
|
#define _PLUGIN_FEATURE_EAP_PEER(kind, type) __PLUGIN_FEATURE(kind, EAP_PEER, .eap = type)
|
|
#define _PLUGIN_FEATURE_DATABASE(kind, type) __PLUGIN_FEATURE(kind, DATABASE, .database = type)
|
|
#define _PLUGIN_FEATURE_FETCHER(kind, type) __PLUGIN_FEATURE(kind, FETCHER, .fetcher = type)
|
|
#define _PLUGIN_FEATURE_CUSTOM(kind, name) __PLUGIN_FEATURE(kind, CUSTOM, .custom = name)
|
|
#define _PLUGIN_FEATURE_XAUTH_SERVER(kind, name) __PLUGIN_FEATURE(kind, XAUTH_SERVER, .xauth = name)
|
|
#define _PLUGIN_FEATURE_XAUTH_PEER(kind, name) __PLUGIN_FEATURE(kind, XAUTH_PEER, .xauth = name)
|
|
|
|
#define __PLUGIN_FEATURE_REGISTER(type, _f) (plugin_feature_t){ FEATURE_REGISTER, FEATURE_##type, .arg.reg.f = _f }
|
|
#define __PLUGIN_FEATURE_REGISTER_BUILDER(type, _f, _final) (plugin_feature_t){ FEATURE_REGISTER, FEATURE_##type, .arg.reg = {.f = _f, .final = _final, }}
|
|
#define _PLUGIN_FEATURE_REGISTER_CRYPTER(type, f) __PLUGIN_FEATURE_REGISTER(type, f)
|
|
#define _PLUGIN_FEATURE_REGISTER_AEAD(type, f) __PLUGIN_FEATURE_REGISTER(type, f)
|
|
#define _PLUGIN_FEATURE_REGISTER_SIGNER(type, f) __PLUGIN_FEATURE_REGISTER(type, f)
|
|
#define _PLUGIN_FEATURE_REGISTER_HASHER(type, f) __PLUGIN_FEATURE_REGISTER(type, f)
|
|
#define _PLUGIN_FEATURE_REGISTER_PRF(type, f) __PLUGIN_FEATURE_REGISTER(type, f)
|
|
#define _PLUGIN_FEATURE_REGISTER_DH(type, f) __PLUGIN_FEATURE_REGISTER(type, f)
|
|
#define _PLUGIN_FEATURE_REGISTER_RNG(type, f) __PLUGIN_FEATURE_REGISTER(type, f)
|
|
#define _PLUGIN_FEATURE_REGISTER_PRIVKEY(type, f, final) __PLUGIN_FEATURE_REGISTER_BUILDER(type, f, final)
|
|
#define _PLUGIN_FEATURE_REGISTER_PRIVKEY_GEN(type, f, final)__PLUGIN_FEATURE_REGISTER_BUILDER(type, f, final)
|
|
#define _PLUGIN_FEATURE_REGISTER_PUBKEY(type, f, final) __PLUGIN_FEATURE_REGISTER_BUILDER(type, f, final)
|
|
#define _PLUGIN_FEATURE_REGISTER_CERT_DECODE(type, f, final)__PLUGIN_FEATURE_REGISTER_BUILDER(type, f, final)
|
|
#define _PLUGIN_FEATURE_REGISTER_CERT_ENCODE(type, f, final)__PLUGIN_FEATURE_REGISTER_BUILDER(type, f, final)
|
|
#define _PLUGIN_FEATURE_REGISTER_DATABASE(type, f) __PLUGIN_FEATURE_REGISTER(type, f)
|
|
#define _PLUGIN_FEATURE_REGISTER_FETCHER(type, f) __PLUGIN_FEATURE_REGISTER(type, f)
|
|
|
|
#define _PLUGIN_FEATURE_CALLBACK(_cb, _data) (plugin_feature_t){ FEATURE_CALLBACK, FEATURE_NONE, .arg.cb = { .f = _cb, .data = _data } }
|
|
|
|
/**
|
|
* Names for plugin_feature_t types.
|
|
*/
|
|
extern enum_name_t *plugin_feature_names;
|
|
|
|
/**
|
|
* Check if feature a matches to feature b.
|
|
*
|
|
* @param a feature to check
|
|
* @param b feature to match against
|
|
* @return TRUE if a matches b
|
|
*/
|
|
bool plugin_feature_matches(plugin_feature_t *a, plugin_feature_t *b);
|
|
|
|
/**
|
|
* Get a string describing feature.
|
|
*
|
|
* @param feature feature to describe
|
|
* @return allocated string describing feature
|
|
*/
|
|
char* plugin_feature_get_string(plugin_feature_t *feature);
|
|
|
|
/**
|
|
* Load a plugin feature using a REGISTER/CALLBACK feature entry.
|
|
*
|
|
* @param plugin plugin providing feature
|
|
* @param feature feature to load
|
|
* @param reg REGISTER/CALLBACK feature entry to use for registration
|
|
*/
|
|
bool plugin_feature_load(plugin_t *plugin, plugin_feature_t *feature,
|
|
plugin_feature_t *reg);
|
|
|
|
/**
|
|
* Unload a plugin feature using a REGISTER/CALLBACK feature entry.
|
|
*
|
|
* @param plugin plugin providing feature
|
|
* @param feature feature to unload
|
|
* @param reg REGISTER/CALLBACK feature entry to use for deregistration
|
|
*/
|
|
bool plugin_feature_unload(plugin_t *plugin, plugin_feature_t *feature,
|
|
plugin_feature_t *reg);
|
|
|
|
#endif /** PLUGIN_FEATURE_H_ @}*/
|