118 lines
3.6 KiB
C
118 lines
3.6 KiB
C
/*
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* Copyright (C) 2008 Martin Willi
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* HSR Hochschule fuer Technik Rapperswil
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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/**
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* @defgroup credential_factory credential_factory
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* @{ @ingroup credentials
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*/
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#ifndef CREDENTIAL_FACTORY_H_
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#define CREDENTIAL_FACTORY_H_
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typedef struct credential_factory_t credential_factory_t;
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typedef enum credential_type_t credential_type_t;
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#include <credentials/builder.h>
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/**
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* Kind of credential.
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*
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* While crypto containers are not really credentials, we still use the
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* credential factory and builders create them.
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*/
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enum credential_type_t {
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/** private key, implemented in private_key_t */
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CRED_PRIVATE_KEY,
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/** public key, implemented in public_key_t */
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CRED_PUBLIC_KEY,
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/** certificates, implemented in certificate_t */
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CRED_CERTIFICATE,
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/** crypto container, implemented in container_t */
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CRED_CONTAINER,
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};
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/**
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* enum names for credential_type_t
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*/
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extern enum_name_t *credential_type_names;
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/**
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* Manages credential construction functions and creates instances.
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*/
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struct credential_factory_t {
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/**
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* Create a credential using a list of builder_part_t's.
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*
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* The variable argument list takes builder_part_t types followed
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* by the type specific value. The list must be terminated using BUILD_END.
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* All passed parts get cloned/refcounted by the builder functions,
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* so free up allocated resources after successful and unsuccessful
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* invocations.
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*
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* @param type credential type to build
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* @param subtype subtype specific for type of the credential
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* @param ... build_part_t arguments, BUILD_END terminated.
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* @return type specific credential, NULL if failed
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*/
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void* (*create)(credential_factory_t *this, credential_type_t type,
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int subtype, ...);
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/**
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* Register a credential builder function.
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*
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* The final flag indicates if the registered builder can build such
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* a credential itself the most common encoding, without the need
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* for an additional builder.
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*
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* @param type type of credential the builder creates
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* @param subtype subtype of the credential, type specific
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* @param final TRUE if this build does not invoke other builders
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* @param constructor builder constructor function to register
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*/
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void (*add_builder)(credential_factory_t *this,
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credential_type_t type, int subtype, bool final,
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builder_function_t constructor);
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/**
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* Unregister a credential builder function.
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*
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* @param constructor constructor function to unregister.
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*/
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void (*remove_builder)(credential_factory_t *this,
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builder_function_t constructor);
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/**
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* Create an enumerator over registered builder types.
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*
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* The enumerator returns only builder types registered with the final
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* flag set.
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*
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* @return enumerator (credential_type_t, int subtype)
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*/
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enumerator_t* (*create_builder_enumerator)(credential_factory_t *this);
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/**
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* Destroy a credential_factory instance.
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*/
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void (*destroy)(credential_factory_t *this);
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};
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/**
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* Create a credential_factory instance.
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*/
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credential_factory_t *credential_factory_create();
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#endif /** CREDENTIAL_FACTORY_H_ @}*/
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