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Strongswan

    1: /*
    2:  * Copyright (C) 2017 Andreas Steffen
    3:  * HSR Hochschule fuer Technik Rapperswil
    4:  *
    5:  * This program is free software; you can redistribute it and/or modify it
    6:  * under the terms of the GNU General Public License as published by the
    7:  * Free Software Foundation; either version 2 of the License, or (at your
    8:  * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
    9:  *
   10:  * This program is distributed in the hope that it will be useful, but
   11:  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
   12:  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
   13:  * for more details.
   14:  */
   15: 
   16: #include "tpm_plugin.h"
   17: #include "tpm_private_key.h"
   18: #include "tpm_cert.h"
   19: #include "tpm_rng.h"
   20: 
   21: #include <tpm_tss.h>
   22: #include <library.h>
   23: 
   24: typedef struct private_tpm_plugin_t private_tpm_plugin_t;
   25: 
   26: /**
   27:  * private data of tpm_plugin
   28:  */
   29: struct private_tpm_plugin_t {
   30: 
   31: 	/**
   32: 	 * public functions
   33: 	 */
   34: 	tpm_plugin_t public;
   35: };
   36: 
   37: METHOD(plugin_t, get_name, char*,
   38: 	private_tpm_plugin_t *this)
   39: {
   40: 	return "tpm";
   41: }
   42: 
   43: METHOD(plugin_t, get_features, int,
   44: 	private_tpm_plugin_t *this, plugin_feature_t *features[])
   45: {
   46: 	static plugin_feature_t f_rng[] = {
   47: 		PLUGIN_REGISTER(RNG, tpm_rng_create),
   48: 			PLUGIN_PROVIDE(RNG, RNG_STRONG),
   49: 			PLUGIN_PROVIDE(RNG, RNG_TRUE),
   50: 	};
   51: 	static plugin_feature_t f_privkey[] = {
   52: 		PLUGIN_REGISTER(PRIVKEY, tpm_private_key_connect, FALSE),
   53: 			PLUGIN_PROVIDE(PRIVKEY, KEY_ANY),
   54: 	};
   55: 	static plugin_feature_t f_cert[] = {
   56: 		PLUGIN_REGISTER(CERT_DECODE, tpm_cert_load, FALSE),
   57: 			PLUGIN_PROVIDE(CERT_DECODE, CERT_X509),
   58: 				PLUGIN_DEPENDS(CERT_DECODE, CERT_X509),
   59: 	};
   60: 	static plugin_feature_t f[countof(f_rng) + countof(f_privkey) +
   61: 							  countof(f_cert)] = {};
   62: 	static int count = 0;
   63: 
   64: 	if (!count)
   65: 	{
   66: 		plugin_features_add(f, f_privkey, countof(f_privkey), &count);
   67: 		plugin_features_add(f, f_cert, countof(f_cert), &count);
   68: 
   69: 		if (lib->settings->get_bool(lib->settings,
   70: 								"%s.plugins.tpm.use_rng", FALSE, lib->ns))
   71: 		{
   72: 			plugin_features_add(f, f_rng, countof(f_rng), &count);
   73: 		}
   74: 	}
   75: 	*features = f;
   76: 
   77: 	return count;
   78: }
   79: 
   80: METHOD(plugin_t, destroy, void,
   81: 	private_tpm_plugin_t *this)
   82: {
   83: 	free(this);
   84: 	libtpmtss_deinit();
   85: }
   86: 
   87: /*
   88:  * see header file
   89:  */
   90: plugin_t *tpm_plugin_create()
   91: {
   92: 	private_tpm_plugin_t *this;
   93: 
   94: 	if (!libtpmtss_init())
   95: 	{
   96: 		return NULL;
   97: 	}
   98: 
   99: 	INIT(this,
  100: 		.public = {
  101: 			.plugin = {
  102: 				.get_name = _get_name,
  103: 				.get_features = _get_features,
  104: 				.destroy = _destroy,
  105: 			},
  106: 		},
  107: 	);
  108: 
  109: 	return &this->public.plugin;
  110: }