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Add nonce plugin implementation 

This nonce generator uses an RNG to generate nonces. The RNG quality is
currently set to RNG_WEAK which is the same value used in IKE init.

The plugin is enabled and thus built by default.
This commit is contained in:
Adrian-Ken Rueegsegger 2012-05-02 17:49:32 +02:00 committed by Tobias Brunner
parent e2fc09c186
commit 04024b5de8
7 changed files with 275 additions and 0 deletions
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4
configure.in
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@ -87,6 +87,7 @@ ARG_DISBL_SET([sha2], [disable SHA256/SHA384/SHA512 software implement
ARG_DISBL_SET([fips-prf], [disable FIPS PRF software implementation plugin.])
ARG_DISBL_SET([gmp], [disable GNU MP (libgmp) based crypto implementation plugin.])
ARG_DISBL_SET([random], [disable RNG implementation on top of /dev/(u)random.])
ARG_DISBL_SET([nonce], [disable nonce generation plugin.])
ARG_DISBL_SET([x509], [disable X509 certificate implementation plugin.])
ARG_DISBL_SET([revocation], [disable X509 CRL/OCSP revocation check plugin.])
ARG_DISBL_SET([constraints], [disable advanced X509 constraint checking plugin.])
@ -822,6 +823,7 @@ ADD_PLUGIN([sha2], [s charon pluto openac scepclient pki scripts
ADD_PLUGIN([md4], [s charon openac manager scepclient pki nm])
ADD_PLUGIN([md5], [s charon pluto openac scepclient pki scripts attest nm])
ADD_PLUGIN([random], [s charon pluto openac scepclient pki scripts medsrv attest nm])
ADD_PLUGIN([nonce], [s charon nm])
ADD_PLUGIN([x509], [s charon pluto openac scepclient pki scripts attest nm])
ADD_PLUGIN([revocation], [s charon nm])
ADD_PLUGIN([constraints], [s charon nm])
@ -942,6 +944,7 @@ AM_CONDITIONAL(USE_SHA2, test x$sha2 = xtrue)
AM_CONDITIONAL(USE_FIPS_PRF, test x$fips_prf = xtrue)
AM_CONDITIONAL(USE_GMP, test x$gmp = xtrue)
AM_CONDITIONAL(USE_RANDOM, test x$random = xtrue)
AM_CONDITIONAL(USE_NONCE, test x$nonce = xtrue)
AM_CONDITIONAL(USE_X509, test x$x509 = xtrue)
AM_CONDITIONAL(USE_REVOCATION, test x$revocation = xtrue)
AM_CONDITIONAL(USE_CONSTRAINTS, test x$constraints = xtrue)
@ -1124,6 +1127,7 @@ AC_OUTPUT(
src/libstrongswan/plugins/fips_prf/Makefile
src/libstrongswan/plugins/gmp/Makefile
src/libstrongswan/plugins/random/Makefile
src/libstrongswan/plugins/nonce/Makefile
src/libstrongswan/plugins/hmac/Makefile
src/libstrongswan/plugins/xcbc/Makefile
src/libstrongswan/plugins/x509/Makefile

7
src/libstrongswan/Makefile.am
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@ -210,6 +210,13 @@ if MONOLITHIC
endif
endif
if USE_NONCE
SUBDIRS += plugins/nonce
if MONOLITHIC
libstrongswan_la_LIBADD += plugins/nonce/libstrongswan-nonce.la
endif
endif
if USE_HMAC
SUBDIRS += plugins/hmac
if MONOLITHIC

16
src/libstrongswan/plugins/nonce/Makefile.am Normal file
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@ -0,0 +1,16 @@
INCLUDES = -I$(top_srcdir)/src/libstrongswan
AM_CFLAGS = -rdynamic
if MONOLITHIC
noinst_LTLIBRARIES = libstrongswan-nonce.la
else
plugin_LTLIBRARIES = libstrongswan-nonce.la
endif
libstrongswan_nonce_la_SOURCES = \
nonce_plugin.h nonce_plugin.c \
nonce_nonceg.c nonce_nonceg.h
libstrongswan_nonce_la_LDFLAGS = -module -avoid-version

84
src/libstrongswan/plugins/nonce/nonce_nonceg.c Normal file
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@ -0,0 +1,84 @@
/*
* Copyright (C) 2012 Adrian-Ken Rueegsegger
* Hochschule fuer Technik Rapperswil
*
* 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.
*/
#include "nonce_nonceg.h"
#include <debug.h>
typedef struct private_nonce_nonceg_t private_nonce_nonceg_t;
/**
* Private data of a nonce_nonceg_t object.
*/
struct private_nonce_nonceg_t {
/**
* Public nonce_nonceg_t interface.
*/
nonce_nonceg_t public;
/**
* Random number generator
*/
rng_t* rng;
};
METHOD(nonce_gen_t, get_nonce, void,
private_nonce_nonceg_t *this, size_t size, u_int8_t *buffer)
{
this->rng->get_bytes(this->rng, size, buffer);
}
METHOD(nonce_gen_t, allocate_nonce, void,
private_nonce_nonceg_t *this, size_t size, chunk_t *chunk)
{
this->rng->allocate_bytes(this->rng, size, chunk);
}
METHOD(nonce_gen_t, destroy, void,
private_nonce_nonceg_t *this)
{
DESTROY_IF(this->rng);
free(this);
}
/*
* Described in header.
*/
nonce_nonceg_t *nonce_nonceg_create()
{
private_nonce_nonceg_t *this;
INIT(this,
.public = {
.nonce_gen = {
.get_nonce = _get_nonce,
.allocate_nonce = _allocate_nonce,
.destroy = _destroy,
},
},
);
this->rng = lib->crypto->create_rng(lib->crypto, RNG_WEAK);
if (!this->rng)
{
DBG1(DBG_LIB, "no RNG found for quality %N", rng_quality_names,
RNG_WEAK);
destroy(this);
return NULL;
}
return &this->public;
}

46
src/libstrongswan/plugins/nonce/nonce_nonceg.h Normal file
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@ -0,0 +1,46 @@
/*
* Copyright (C) 2012 Adrian-Ken Rueegsegger
* Hochschule fuer Technik Rapperswil
*
* 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 nonce_nonceg nonce_nonceg
* @{ @ingroup nonce_p
*/
#ifndef NONCE_NONCEG_H_
#define NONCE_NONCEG_H_
typedef struct nonce_nonceg_t nonce_nonceg_t;
#include <library.h>
/**
* nonce_gen_t implementation using an rng plugin
*/
struct nonce_nonceg_t {
/**
* Implements nonce_gen_t.
*/
nonce_gen_t nonce_gen;
};
/**
* Creates an nonce_nonceg_t instance.
*
* @return created nonce_nonceg_t
*/
nonce_nonceg_t *nonce_nonceg_create();
#endif /** NONCE_NONCEG_H_ @} */

76
src/libstrongswan/plugins/nonce/nonce_plugin.c Normal file
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@ -0,0 +1,76 @@
/*
* Copyright (C) 2012 Adrian-Ken Rueegsegger
* Hochschule fuer Technik Rapperswil
*
* 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.
*/
#include "nonce_plugin.h"
#include <library.h>
#include "nonce_nonceg.h"
typedef struct private_nonce_plugin_t private_nonce_plugin_t;
/**
* private data of nonce_plugin
*/
struct private_nonce_plugin_t {
/**
* public functions
*/
nonce_plugin_t public;
};
METHOD(plugin_t, get_name, char*,
private_nonce_plugin_t *this)
{
return "nonce";
}
METHOD(plugin_t, get_features, int,
private_nonce_plugin_t *this, plugin_feature_t *features[])
{
static plugin_feature_t f[] = {
PLUGIN_REGISTER(NONCE_GEN, nonce_nonceg_create),
PLUGIN_PROVIDE(NONCE_GEN),
PLUGIN_DEPENDS(RNG, RNG_WEAK),
};
*features = f;
return countof(f);
}
METHOD(plugin_t, destroy, void,
private_nonce_plugin_t *this)
{
free(this);
}
/*
* see header file
*/
plugin_t *nonce_plugin_create()
{
private_nonce_plugin_t *this;
INIT(this,
.public = {
.plugin = {
.get_name = _get_name,
.get_features = _get_features,
.destroy = _destroy,
},
},
);
return &this->public.plugin;
}

42
src/libstrongswan/plugins/nonce/nonce_plugin.h Normal file
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@ -0,0 +1,42 @@
/*
* Copyright (C) 2012 Adrian-Ken Rueegsegger
* Hochschule fuer Technik Rapperswil
*
* 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 nonce_p nonce
* @ingroup plugins
*
* @defgroup nonce_plugin nonce_plugin
* @{ @ingroup nonce_p
*/
#ifndef NONCE_PLUGIN_H_
#define NONCE_PLUGIN_H_
#include <plugins/plugin.h>
typedef struct nonce_plugin_t nonce_plugin_t;
/**
* Plugin implementing a nonce generator using an RNG.
*/
struct nonce_plugin_t {
/**
* Implements plugin interface
*/
plugin_t plugin;
};
#endif /** NONCE_PLUGIN_H_ @}*/