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/* Pluto certificate/CRL/AC builder hooks.
* Copyright (C) 2002-2009 Andreas Steffen
* Copyright (C) 2009 Martin Willi
* HSR 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 "builder.h"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <freeswan.h>
#include "library.h"
#include "constants.h"
#include "defs.h"
#include "log.h"
#include "id.h"
#include "certs.h"
#include "ac.h"
#include "crl.h"
typedef struct private_builder_t private_builder_t;
struct private_builder_t {
/** implements builder interface */
builder_t public;
/** built credential */
union {
void *cred;
cert_t *cert;
x509crl_t *crl;
x509acert_t *ac;
};
};
/**
* builder add function for certificates
*/
static void cert_add(private_builder_t *this, builder_part_t part, ...)
{
chunk_t blob;
va_list args;
va_start(args, part);
blob = va_arg(args, chunk_t);
va_end(args);
switch (part)
{
case BUILD_BLOB_PGP:
{
pgpcert_t *pgpcert = malloc_thing(pgpcert_t);
*pgpcert = pgpcert_empty;
if (parse_pgp(blob, pgpcert))
{
this->cert = malloc_thing(cert_t);
this->cert->type = CERT_PGP;
this->cert->u.pgp = pgpcert;
}
else
{
plog(" error in OpenPGP certificate");
free_pgpcert(pgpcert);
}
break;
}
case BUILD_BLOB_ASN1_DER:
{
x509cert_t *x509cert = malloc_thing(x509cert_t);
*x509cert = empty_x509cert;
if (parse_x509cert(blob, 0, x509cert))
{
this->cert = malloc_thing(cert_t);
this->cert->type = CERT_X509_SIGNATURE;
this->cert->u.x509 = x509cert;
}
else
{
plog(" error in X.509 certificate");
free_x509cert(x509cert);
}
break;
}
default:
if (this->cert)
{
switch (this->cert->type)
{
case CERT_X509_SIGNATURE:
free_x509cert(this->cert->u.x509);
break;
case CERT_PGP:
free_pgpcert(this->cert->u.pgp);
break;
default:
break;
}
free(this->cert);
}
builder_cancel(&this->public);
break;
}
}
/**
* builder add function for attribute certificates
*/
static void ac_add(private_builder_t *this, builder_part_t part, ...)
{
chunk_t blob;
va_list args;
switch (part)
{
case BUILD_BLOB_ASN1_DER:
{
va_start(args, part);
blob = va_arg(args, chunk_t);
va_end(args);
this->ac = malloc_thing(x509acert_t);
*this->ac = empty_ac;
if (!parse_ac(blob, this->ac) && !verify_x509acert(this->ac, FALSE))
{
free_acert(this->ac);
this->ac = NULL;
}
break;
}
default:
free_acert(this->ac);
builder_cancel(&this->public);
break;
}
}
/**
* builder add function for crls
*/
static void crl_add(private_builder_t *this, builder_part_t part, ...)
{
chunk_t blob;
va_list args;
switch (part)
{
case BUILD_BLOB_ASN1_DER:
{
va_start(args, part);
blob = va_arg(args, chunk_t);
va_end(args);
this->crl = malloc_thing(x509crl_t);
*this->crl = empty_x509crl;
if (!parse_x509crl(blob, 0, this->crl))
{
plog(" error in X.509 crl");
free_crl(this->crl);
this->crl = NULL;
}
break;
}
default:
free_crl(this->crl);
builder_cancel(&this->public);
break;
}
}
/**
* builder build function
*/
static void *build(private_builder_t *this)
{
void *cred;
cred = this->cred;
free(this);
return cred;
}
/**
* builder for pluto credentials
*/
static builder_t *builder(credential_type_t type, int subtype)
{
private_builder_t *this = malloc_thing(private_builder_t);
switch (subtype)
{
case CRED_TYPE_CERTIFICATE:
this->public.add = (void(*)(builder_t *this, builder_part_t part, ...))cert_add;
break;
case CRED_TYPE_AC:
this->public.add = (void(*)(builder_t *this, builder_part_t part, ...))ac_add;
break;
case CRED_TYPE_CRL:
this->public.add = (void(*)(builder_t *this, builder_part_t part, ...))crl_add;
break;
default:
free(this);
return NULL;
}
this->public.build = (void*(*)(builder_t*))build;
this->cred = NULL;
return &this->public;
}
void init_builder(void)
{
lib->creds->add_builder(lib->creds, CRED_PLUTO_CERT, 0,
(builder_constructor_t)builder);
}
void free_builder(void)
{
lib->creds->remove_builder(lib->creds, (builder_constructor_t)builder);
}
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