diff options
Diffstat (limited to 'src/libcharon/plugins/ipseckey')
| -rw-r--r-- | src/libcharon/plugins/ipseckey/Makefile.am | 18 | ||||
| -rw-r--r-- | src/libcharon/plugins/ipseckey/Makefile.in | 662 | ||||
| -rw-r--r-- | src/libcharon/plugins/ipseckey/ipseckey.c | 209 | ||||
| -rw-r--r-- | src/libcharon/plugins/ipseckey/ipseckey.h | 149 | ||||
| -rw-r--r-- | src/libcharon/plugins/ipseckey/ipseckey_cred.c | 263 | ||||
| -rw-r--r-- | src/libcharon/plugins/ipseckey/ipseckey_cred.h | 57 | ||||
| -rw-r--r-- | src/libcharon/plugins/ipseckey/ipseckey_plugin.c | 103 | ||||
| -rw-r--r-- | src/libcharon/plugins/ipseckey/ipseckey_plugin.h | 48 |
8 files changed, 1509 insertions, 0 deletions
diff --git a/src/libcharon/plugins/ipseckey/Makefile.am b/src/libcharon/plugins/ipseckey/Makefile.am new file mode 100644 index 000000000..0614017a0 --- /dev/null +++ b/src/libcharon/plugins/ipseckey/Makefile.am @@ -0,0 +1,18 @@ + +INCLUDES = \ + -I$(top_srcdir)/src/libstrongswan \ + -I$(top_srcdir)/src/libhydra \ + -I$(top_srcdir)/src/libcharon + +if MONOLITHIC +noinst_LTLIBRARIES = libstrongswan-ipseckey.la +else +plugin_LTLIBRARIES = libstrongswan-ipseckey.la +endif + +libstrongswan_ipseckey_la_SOURCES = \ + ipseckey_plugin.h ipseckey_plugin.c \ + ipseckey_cred.h ipseckey_cred.c \ + ipseckey.h ipseckey.c + +libstrongswan_ipseckey_la_LDFLAGS = -module -avoid-version diff --git a/src/libcharon/plugins/ipseckey/Makefile.in b/src/libcharon/plugins/ipseckey/Makefile.in new file mode 100644 index 000000000..fd50854fc --- /dev/null +++ b/src/libcharon/plugins/ipseckey/Makefile.in @@ -0,0 +1,662 @@ +# Makefile.in generated by automake 1.11.6 from Makefile.am. +# @configure_input@ + +# Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, +# 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Free Software +# Foundation, Inc. +# This Makefile.in is free software; the Free Software Foundation +# gives unlimited permission to copy and/or distribute it, +# with or without modifications, as long as this notice is preserved. + +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY, to the extent permitted by law; without +# even the implied warranty of MERCHANTABILITY or FITNESS FOR A +# PARTICULAR PURPOSE. + +@SET_MAKE@ + +VPATH = @srcdir@ +am__make_dryrun = \ + { \ + am__dry=no; \ + case $$MAKEFLAGS in \ + *\\[\ \ ]*) \ + echo 'am--echo: ; @echo "AM" OK' | $(MAKE) -f - 2>/dev/null \ + | grep '^AM OK$$' >/dev/null || am__dry=yes;; \ + *) \ + for am__flg in $$MAKEFLAGS; do \ + case $$am__flg in \ + *=*|--*) ;; \ + *n*) am__dry=yes; break;; \ + esac; \ + done;; \ + esac; \ + test $$am__dry = yes; \ + } +pkgdatadir = 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install-pluginLTLIBRARIES install-ps install-ps-am \ + install-strip installcheck installcheck-am installdirs \ + maintainer-clean maintainer-clean-generic mostlyclean \ + mostlyclean-compile mostlyclean-generic mostlyclean-libtool \ + pdf pdf-am ps ps-am tags uninstall uninstall-am \ + uninstall-pluginLTLIBRARIES + + +# Tell versions [3.59,3.63) of GNU make to not export all variables. +# Otherwise a system limit (for SysV at least) may be exceeded. +.NOEXPORT: diff --git a/src/libcharon/plugins/ipseckey/ipseckey.c b/src/libcharon/plugins/ipseckey/ipseckey.c new file mode 100644 index 000000000..ca126d772 --- /dev/null +++ b/src/libcharon/plugins/ipseckey/ipseckey.c @@ -0,0 +1,209 @@ +/* + * Copyright (C) 2012 Reto Guadagnini + * 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 "ipseckey.h" + +#include <library.h> +#include <utils/debug.h> +#include <bio/bio_reader.h> + +typedef struct private_ipseckey_t private_ipseckey_t; + +/** +* private data of the ipseckey +*/ +struct private_ipseckey_t { + + /** + * public functions + */ + ipseckey_t public; + + /** + * Precedence + */ + u_int8_t precedence; + + /** + * Gateway type + */ + u_int8_t gateway_type; + + /** + * Algorithm + */ + u_int8_t algorithm; + + /** + * Gateway + */ + chunk_t gateway; + + /** + * Public key + */ + chunk_t public_key; +}; + +METHOD(ipseckey_t, get_precedence, u_int8_t, + private_ipseckey_t *this) +{ + return this->precedence; +} + +METHOD(ipseckey_t, get_gateway_type, ipseckey_gw_type_t, + private_ipseckey_t *this) +{ + return this->gateway_type; +} + +METHOD(ipseckey_t, get_algorithm, ipseckey_algorithm_t, + private_ipseckey_t *this) +{ + return this->algorithm; +} + +METHOD(ipseckey_t, get_gateway, chunk_t, + private_ipseckey_t *this) +{ + return this->gateway; +} + +METHOD(ipseckey_t, get_public_key, chunk_t, + private_ipseckey_t *this) +{ + return this->public_key; +} + +METHOD(ipseckey_t, destroy, void, + private_ipseckey_t *this) +{ + chunk_free(&this->gateway); + chunk_free(&this->public_key); + free(this); +} + +/* + * See header + */ +ipseckey_t *ipseckey_create_frm_rr(rr_t *rr) +{ + private_ipseckey_t *this; + bio_reader_t *reader = NULL; + u_int8_t label; + chunk_t tmp; + + INIT(this, + .public = { + .get_precedence = _get_precedence, + .get_gateway_type = _get_gateway_type, + .get_algorithm = _get_algorithm, + .get_gateway = _get_gateway, + .get_public_key = _get_public_key, + .destroy = _destroy, + }, + ); + + if (rr->get_type(rr) != RR_TYPE_IPSECKEY) + { + DBG1(DBG_CFG, "unable to create an ipseckey out of an RR " + "whose type is not IPSECKEY"); + free(this); + return NULL; + } + + /** Parse the content (RDATA field) of the RR */ + reader = bio_reader_create(rr->get_rdata(rr)); + if (!reader->read_uint8(reader, &this->precedence) || + !reader->read_uint8(reader, &this->gateway_type) || + !reader->read_uint8(reader, &this->algorithm)) + { + DBG1(DBG_CFG, "ipseckey RR has a wrong format"); + reader->destroy(reader); + free(this); + return NULL; + } + + switch (this->gateway_type) + { + case IPSECKEY_GW_TP_NOT_PRESENT: + break; + + case IPSECKEY_GW_TP_IPV4: + if (!reader->read_data(reader, 4, &this->gateway)) + { + DBG1(DBG_CFG, "ipseckey gateway field does not contain an " + "IPv4 address as expected"); + reader->destroy(reader); + free(this); + return NULL; + } + this->gateway = chunk_clone(this->gateway); + break; + + case IPSECKEY_GW_TP_IPV6: + if (!reader->read_data(reader, 16, &this->gateway)) + { + DBG1(DBG_CFG, "ipseckey gateway field does not contain an " + "IPv6 address as expected"); + reader->destroy(reader); + free(this); + return NULL; + } + this->gateway = chunk_clone(this->gateway); + break; + + case IPSECKEY_GW_TP_WR_ENC_DNAME: + /** + * Uncompressed domain name as defined in RFC 1035 chapter 3. + * + * TODO: Currently we ignore wire encoded domain names. + * + */ + while (reader->read_uint8(reader, &label) && + label != 0 && label < 192) + { + if (!reader->read_data(reader, label, &tmp)) + { + DBG1(DBG_CFG, "wrong wire encoded domain name format " + "in ipseckey gateway field"); + reader->destroy(reader); + free(this); + return NULL; + } + } + break; + + default: + DBG1(DBG_CFG, "unable to parse ipseckey gateway field"); + reader->destroy(reader); + free(this); + return NULL; + } + + if (!reader->read_data(reader, reader->remaining(reader), + &this->public_key)) + { + DBG1(DBG_CFG, "failed to read ipseckey public key field"); + reader->destroy(reader); + chunk_free(&this->gateway); + free(this); + return NULL; + } + this->public_key = chunk_clone(this->public_key); + reader->destroy(reader); + return &this->public; +} + diff --git a/src/libcharon/plugins/ipseckey/ipseckey.h b/src/libcharon/plugins/ipseckey/ipseckey.h new file mode 100644 index 000000000..5885daeee --- /dev/null +++ b/src/libcharon/plugins/ipseckey/ipseckey.h @@ -0,0 +1,149 @@ +/* + * Copyright (C) 2012 Reto Guadagnini + * 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 ipseckey_i ipseckey + * @{ @ingroup ipseckey + */ + +#ifndef IPSECKEY_H_ +#define IPSECKEY_H_ + +typedef struct ipseckey_t ipseckey_t; +typedef enum ipseckey_algorithm_t ipseckey_algorithm_t; +typedef enum ipseckey_gw_type_t ipseckey_gw_type_t; + +#include <library.h> + +/** + * IPSECKEY gateway types as defined in RFC 4025. + */ +enum ipseckey_gw_type_t { + /** No gateway is present */ + IPSECKEY_GW_TP_NOT_PRESENT = 0, + /** A 4-byte IPv4 address is present */ + IPSECKEY_GW_TP_IPV4 = 1, + /** A 16-byte IPv6 address is present */ + IPSECKEY_GW_TP_IPV6 = 2, + /** A wire-encoded domain name is present */ + IPSECKEY_GW_TP_WR_ENC_DNAME = 3, +}; + +/** + * IPSECKEY algorithms as defined in RFC 4025. + */ +enum ipseckey_algorithm_t { + /** No key present */ + IPSECKEY_ALGORITHM_NONE = 0, + /** DSA key */ + IPSECKEY_ALGORITHM_DSA = 1, + /** RSA key */ + IPSECKEY_ALGORITHM_RSA = 2, +}; + +/** + * An IPSECKEY. + * + * Represents an IPSECKEY as defined in RFC 4025: + * + * 0 1 2 3 + * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + * | precedence | gateway type | algorithm | gateway | + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-------------+ + + * ~ gateway ~ + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + * | / + * / public key / + * / / + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-| + * + * + * Note: RFC 4025 defines that the algorithm field has a length of 7 bits. + * We use 8 bits instead, because the use of 7 bits is very uncommon + * in internet protocols and might be an error in RFC 4025 + * (also the BIND DNS server uses 8 bits for the algorithm field of the + * IPSECKEY resource records). + * + */ +struct ipseckey_t { + + /** + * Get the precedence of the IPSECKEY. + * + * @return precedence + */ + u_int8_t (*get_precedence)(ipseckey_t *this); + + /** + * Get the type of the gateway. + * + * The "gateway type" determines the format of the gateway field + * of the IPSECKEY. + * + * @return gateway type + */ + ipseckey_gw_type_t (*get_gateway_type)(ipseckey_t *this); + + /** + * Get the algorithm. + * + * The "algorithm" determines the format of the public key field + * of the IPSECKEY. + * + * @return algorithm + */ + ipseckey_algorithm_t (*get_algorithm)(ipseckey_t *this); + + /** + * Get the content of the gateway field as chunk. + * + * The content is in network byte order and its format depends on the + * gateway type. + * + * The data pointed by the chunk is still owned by the IPSECKEY. + * Clone it if necessary. + * + * @return gateway field as chunk + */ + chunk_t (*get_gateway)(ipseckey_t *this); + + /** + * Get the content of the public key field as chunk. + * + * The format of the public key depends on the algorithm type. + * + * The data pointed by the chunk is still owned by the IPSECKEY. + * Clone it if necessary. + * + * @return public key field as chunk + */ + chunk_t (*get_public_key)(ipseckey_t *this); + + /** + * Destroy the IPSECKEY. + */ + void (*destroy) (ipseckey_t *this); +}; + +/** + * Create an ipseckey instance out of a resource record. + * + * @param rr resource record which contains an IPSECKEY + * @return ipseckey, NULL on failure + */ +ipseckey_t *ipseckey_create_frm_rr(rr_t *rr); + +#endif /** IPSECKEY_H_ @}*/ diff --git a/src/libcharon/plugins/ipseckey/ipseckey_cred.c b/src/libcharon/plugins/ipseckey/ipseckey_cred.c new file mode 100644 index 000000000..e8722f12c --- /dev/null +++ b/src/libcharon/plugins/ipseckey/ipseckey_cred.c @@ -0,0 +1,263 @@ +/* + * Copyright (C) 2012 Reto Guadagnini + * 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. + */ +#define _GNU_SOURCE +#include <stdio.h> +#include <string.h> + +#include "ipseckey_cred.h" +#include "ipseckey.h" + +#include <bio/bio_reader.h> +#include <daemon.h> + +typedef struct private_ipseckey_cred_t private_ipseckey_cred_t; + +/** + * Private data of an ipseckey_cred_t object + */ +struct private_ipseckey_cred_t { + + /** + * Public part + */ + ipseckey_cred_t public; + + /** + * DNS resolver + */ + resolver_t *res; +}; + +/** + * enumerator over certificates + */ +typedef struct { + /** implements enumerator interface */ + enumerator_t public; + /** inner enumerator (enumerates IPSECKEY resource records) */ + enumerator_t *inner; + /** response of the DNS resolver which contains the IPSECKEYs */ + resolver_response_t *response; + /* IPSECKEYs are not valid before this point in time */ + time_t notBefore; + /* IPSECKEYs are not valid after this point in time */ + time_t notAfter; + /* identity to which the IPSECKEY belongs */ + identification_t *identity; +} cert_enumerator_t; + +METHOD(enumerator_t, cert_enumerator_enumerate, bool, + cert_enumerator_t *this, certificate_t **cert) +{ + rr_t *cur_rr = NULL; + ipseckey_t *cur_ipseckey = NULL; + chunk_t pub_key; + public_key_t * key = NULL; + bool supported_ipseckey_found = FALSE; + + /* Get the next supported IPSECKEY using the inner enumerator. */ + while (this->inner->enumerate(this->inner, &cur_rr) && + !supported_ipseckey_found) + { + supported_ipseckey_found = TRUE; + + cur_ipseckey = ipseckey_create_frm_rr(cur_rr); + + if (!cur_ipseckey) + { + DBG1(DBG_CFG, "failed to parse ipseckey - skipping this key"); + supported_ipseckey_found = FALSE; + } + + if (cur_ipseckey && + cur_ipseckey->get_algorithm(cur_ipseckey) != IPSECKEY_ALGORITHM_RSA) + { + DBG1(DBG_CFG, "unsupported ipseckey algorithm -skipping this key"); + cur_ipseckey->destroy(cur_ipseckey); + supported_ipseckey_found = FALSE; + } + } + + if (supported_ipseckey_found) + { + /* + * Wrap the key of the IPSECKEY in a certificate and return this + * certificate. + */ + pub_key = cur_ipseckey->get_public_key(cur_ipseckey); + + key = lib->creds->create(lib->creds, CRED_PUBLIC_KEY, KEY_RSA, + BUILD_BLOB_DNSKEY, pub_key, + BUILD_END); + + if (!key) + { + DBG1(DBG_CFG, "failed to create public key from ipseckey"); + cur_ipseckey->destroy(cur_ipseckey); + return FALSE; + } + + *cert = lib->creds->create(lib->creds, CRED_CERTIFICATE, + CERT_TRUSTED_PUBKEY, + BUILD_PUBLIC_KEY, key, + BUILD_SUBJECT, this->identity, + BUILD_NOT_BEFORE_TIME, this->notBefore, + BUILD_NOT_AFTER_TIME, this->notAfter, + BUILD_END); + return TRUE; + } + + return FALSE; +} + +METHOD(enumerator_t, cert_enumerator_destroy, void, + cert_enumerator_t *this) +{ + this->inner->destroy(this->inner); + this->response->destroy(this->response); + free(this); +} + +METHOD(credential_set_t, create_cert_enumerator, enumerator_t*, + private_ipseckey_cred_t *this, certificate_type_t cert, key_type_t key, + identification_t *id, bool trusted) +{ + char *fqdn = NULL; + resolver_response_t *response = NULL; + rr_set_t *rrset = NULL; + enumerator_t *rrsig_enum = NULL; + rr_t *rrsig = NULL; + bio_reader_t *reader = NULL; + chunk_t ignore; + u_int32_t nBefore, nAfter; + cert_enumerator_t *e; + + if (id && id->get_type(id) == ID_FQDN) + { + /** Query the DNS for the required IPSECKEY RRs */ + + if (0 >= asprintf(&fqdn, "%Y", id)) + { + DBG1(DBG_CFG, "empty FQDN string"); + return enumerator_create_empty(); + } + + DBG1(DBG_CFG, "performing a DNS query for IPSECKEY RRs of '%s'", + fqdn); + response = this->res->query(this->res, fqdn, RR_CLASS_IN, + RR_TYPE_IPSECKEY); + if (!response) + { + DBG1(DBG_CFG, " query for IPSECKEY RRs failed"); + free(fqdn); + return enumerator_create_empty(); + } + + if (!response->has_data(response) || + !response->query_name_exist(response)) + { + DBG1(DBG_CFG, " unable to retrieve IPSECKEY RRs from the DNS"); + response->destroy(response); + free(fqdn); + return enumerator_create_empty(); + } + + if (!(response->get_security_state(response) == SECURE)) + { + DBG1(DBG_CFG, " DNSSEC state of IPSECKEY RRs is not secure"); + response->destroy(response); + free(fqdn); + return enumerator_create_empty(); + } + + free(fqdn); + + /** Determine the validity period of the retrieved IPSECKEYs + * + * We use the "Signature Inception" and "Signature Expiration" field + * of the first RRSIG RR to determine the validity period of the + * IPSECKEY RRs. TODO: Take multiple RRSIGs into account. + */ + rrset = response->get_rr_set(response); + rrsig_enum = rrset->create_rrsig_enumerator(rrset); + if (!rrsig_enum || !rrsig_enum->enumerate(rrsig_enum, &rrsig)) + { + DBG1(DBG_CFG, " unable to determine the validity period of " + "IPSECKEY RRs because no RRSIGs are present"); + DESTROY_IF(rrsig_enum); + response->destroy(response); + return enumerator_create_empty(); + } + + /** + * Parse the RRSIG for its validity period (RFC 4034) + */ + reader = bio_reader_create(rrsig->get_rdata(rrsig)); + reader->read_data(reader, 8, &ignore); + reader->read_uint32(reader, &nAfter); + reader->read_uint32(reader, &nBefore); + reader->destroy(reader); + + /*Create and return an iterator over the retrieved IPSECKEYs */ + INIT(e, + .public = { + .enumerate = (void*)_cert_enumerator_enumerate, + .destroy = _cert_enumerator_destroy, + }, + .inner = response->get_rr_set(response)->create_rr_enumerator( + response->get_rr_set(response)), + .response = response, + .notBefore = nBefore, + .notAfter = nAfter, + .identity = id, + ); + + return &e->public; + } + + + return enumerator_create_empty(); +} + +METHOD(ipseckey_cred_t, destroy, void, + private_ipseckey_cred_t *this) +{ + this->res->destroy(this->res); + free(this); +} + +/** + * Described in header. + */ +ipseckey_cred_t *ipseckey_cred_create(resolver_t *res) +{ + private_ipseckey_cred_t *this; + + INIT(this, + .public = { + .set = { + .create_private_enumerator = (void*)return_null, + .create_cert_enumerator = _create_cert_enumerator, + .create_shared_enumerator = (void*)return_null, + .create_cdp_enumerator = (void*)return_null, + .cache_cert = (void*)nop, + }, + .destroy = _destroy, + }, + .res = res, + ); + + return &this->public; +} diff --git a/src/libcharon/plugins/ipseckey/ipseckey_cred.h b/src/libcharon/plugins/ipseckey/ipseckey_cred.h new file mode 100644 index 000000000..440020f5d --- /dev/null +++ b/src/libcharon/plugins/ipseckey/ipseckey_cred.h @@ -0,0 +1,57 @@ +/* + * Copyright (C) 2012 Reto Guadagnini + * 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 ipseckey_cred_i ipseckey_cred + * @{ @ingroup ipseckey + */ + +#ifndef IPSECKEY_CRED_H_ +#define IPSECKEY_CRED_H_ + +#include <credentials/credential_set.h> +#include <resolver/resolver.h> + +typedef struct ipseckey_cred_t ipseckey_cred_t; + +/** + * IPSECKEY credential set. + * + * The ipseckey credential set contains IPSECKEYs as certificates of type + * pubkey_cert_t. + */ +struct ipseckey_cred_t { + + /** + * Implements credential_set_t interface + */ + credential_set_t set; + + /** + * Destroy the ipseckey_cred. + */ + void (*destroy)(ipseckey_cred_t *this); +}; + +/** + * Create an ipseckey_cred instance which uses the given resolver + * to query the DNS for IPSECKEY resource records. + * + * @param res resolver to use + * @return credential set + */ +ipseckey_cred_t *ipseckey_cred_create(resolver_t *res); + +#endif /** IPSECKEY_CRED_H_ @}*/ diff --git a/src/libcharon/plugins/ipseckey/ipseckey_plugin.c b/src/libcharon/plugins/ipseckey/ipseckey_plugin.c new file mode 100644 index 000000000..9593cf939 --- /dev/null +++ b/src/libcharon/plugins/ipseckey/ipseckey_plugin.c @@ -0,0 +1,103 @@ +/* + * Copyright (C) 2012 Reto Guadagnini + * 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 "ipseckey_plugin.h" + +#include <daemon.h> +#include "ipseckey_cred.h" + +typedef struct private_ipseckey_plugin_t private_ipseckey_plugin_t; + + +/** + * private data of the ipseckey plugin + */ +struct private_ipseckey_plugin_t { + + /** + * implements plugin interface + */ + ipseckey_plugin_t public; + + /** + * DNS resolver instance + */ + resolver_t *res; + + /** + * credential set + */ + ipseckey_cred_t *cred; + + /** + * IPSECKEY based authentication enabled + */ + bool enabled; +}; + +METHOD(plugin_t, get_name, char*, + private_ipseckey_plugin_t *this) +{ + return "ipseckey"; +} + +METHOD(plugin_t, destroy, void, + private_ipseckey_plugin_t *this) +{ + if (this->enabled) + { + lib->credmgr->remove_set(lib->credmgr, &this->cred->set); + } + DESTROY_IF(this->res); + DESTROY_IF(this->cred); + free(this); +} + +/* + * see header file + */ +plugin_t *ipseckey_plugin_create() +{ + private_ipseckey_plugin_t *this; + + INIT(this, + .public = { + .plugin = { + .get_name = _get_name, + .reload = (void*)return_false, + .destroy = _destroy, + }, + }, + .res = lib->resolver->create(lib->resolver), + .enabled = lib->settings->get_bool(lib->settings, + "%s.plugins.ipseckey.enable", FALSE, charon->name), + ); + + if (!this->res) + { + DBG1(DBG_CFG, "failed to create a DNS resolver instance"); + destroy(this); + return NULL; + } + + if (this->enabled) + { + this->cred = ipseckey_cred_create(this->res); + lib->credmgr->add_set(lib->credmgr, &this->cred->set); + } + + return &this->public.plugin; +} + diff --git a/src/libcharon/plugins/ipseckey/ipseckey_plugin.h b/src/libcharon/plugins/ipseckey/ipseckey_plugin.h new file mode 100644 index 000000000..95acc79dd --- /dev/null +++ b/src/libcharon/plugins/ipseckey/ipseckey_plugin.h @@ -0,0 +1,48 @@ +/* + * Copyright (C) 2012 Reto Guadagnini + * 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 ipseckey ipseckey + * @ingroup cplugins + * + * @defgroup ipseckey_plugin ipseckey_plugin + * @{ @ingroup ipseckey + */ + +#ifndef IPSECKEY_PLUGIN_H_ +#define IPSECKEY_PLUGIN_H_ + +#include <plugins/plugin.h> + +typedef struct ipseckey_plugin_t ipseckey_plugin_t; + +/** + * IPSECKEY plugin + * + * The IPSECKEY plugin registers a credential set for IPSECKEYs. + * + * With this credential set it is possible to authenticate tunnel endpoints + * using IPSECKEY resource records which are retrieved from the DNS in a secure + * way (DNSSEC). + */ +struct ipseckey_plugin_t { + + /** + * implements plugin interface + */ + plugin_t plugin; +}; + +#endif /** IPSECKEY_PLUGIN_H_ @}*/ |