Implemented IKEv1 pubkey SIG payload processing in an authenticator
This commit is contained in:
Martin Willi
@@ -65,6 +65,7 @@ sa/authenticators/eap/eap_manager.c sa/authenticators/eap/eap_manager.h \
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sa/authenticators/psk_authenticator.c sa/authenticators/psk_authenticator.h \
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sa/authenticators/pubkey_authenticator.c sa/authenticators/pubkey_authenticator.h \
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sa/authenticators/psk_v1_authenticator.c sa/authenticators/psk_v1_authenticator.h \
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sa/authenticators/pubkey_v1_authenticator.c sa/authenticators/pubkey_v1_authenticator.h \
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sa/authenticators/xauth_authenticator.c sa/authenticators/xauth_authenticator.h \
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sa/authenticators/xauth/xauth_method.c sa/authenticators/xauth/xauth_method.h \
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sa/authenticators/xauth/xauth_manager.c sa/authenticators/xauth/xauth_manager.h \
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@@ -0,0 +1,207 @@
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/*
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* Copyright (C) 2011 Martin Willi
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* Copyright (C) 2011 revosec AG
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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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#include "pubkey_v1_authenticator.h"
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#include <daemon.h>
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#include <sa/keymat_v1.h>
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#include <encoding/payloads/hash_payload.h>
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typedef struct private_pubkey_v1_authenticator_t private_pubkey_v1_authenticator_t;
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/**
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* Private data of an pubkey_v1_authenticator_t object.
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*/
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struct private_pubkey_v1_authenticator_t {
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/**
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* Public authenticator_t interface.
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*/
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pubkey_v1_authenticator_t public;
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/**
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* Assigned IKE_SA
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*/
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ike_sa_t *ike_sa;
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/**
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* TRUE if we are initiator
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*/
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bool initiator;
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/**
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* DH key exchange
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*/
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diffie_hellman_t *dh;
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/**
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* Others DH public value
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*/
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chunk_t dh_value;
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/**
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* Encoded SA payload, without fixed header
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*/
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chunk_t sa_payload;
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};
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METHOD(authenticator_t, build, status_t,
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private_pubkey_v1_authenticator_t *this, message_t *message)
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{
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hash_payload_t *sig_payload;
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chunk_t hash, sig, dh;
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keymat_v1_t *keymat;
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status_t status;
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private_key_t *private;
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identification_t *id;
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auth_cfg_t *auth;
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key_type_t type;
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signature_scheme_t scheme;
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/* TODO-IKEv1: other key types */
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type = KEY_RSA;
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scheme = SIGN_RSA_EMSA_PKCS1_NULL;
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id = this->ike_sa->get_my_id(this->ike_sa);
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auth = this->ike_sa->get_auth_cfg(this->ike_sa, TRUE);
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private = lib->credmgr->get_private(lib->credmgr, KEY_RSA, id, auth);
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if (!private)
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{
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DBG1(DBG_IKE, "no private key found for '%Y'", id);
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return NOT_FOUND;
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}
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this->dh->get_my_public_value(this->dh, &dh);
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keymat = (keymat_v1_t*)this->ike_sa->get_keymat(this->ike_sa);
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hash = keymat->get_hash(keymat, this->initiator, dh, this->dh_value,
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this->ike_sa->get_id(this->ike_sa), this->sa_payload, id);
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free(dh.ptr);
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if (private->sign(private, scheme, hash, &sig))
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{
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sig_payload = hash_payload_create(SIGNATURE_V1);
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sig_payload->set_hash(sig_payload, sig);
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free(sig.ptr);
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message->add_payload(message, &sig_payload->payload_interface);
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status = SUCCESS;
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DBG1(DBG_IKE, "authentication of '%Y' (myself) successful", id);
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}
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else
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{
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DBG1(DBG_IKE, "authentication of '%Y' (myself) failed", id);
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status = FAILED;
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}
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private->destroy(private);
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free(hash.ptr);
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return status;
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}
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METHOD(authenticator_t, process, status_t,
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private_pubkey_v1_authenticator_t *this, message_t *message)
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{
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chunk_t hash, sig, dh;
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keymat_v1_t *keymat;
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public_key_t *public;
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hash_payload_t *sig_payload;
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auth_cfg_t *auth, *current_auth;
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enumerator_t *enumerator;
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status_t status = NOT_FOUND;
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key_type_t type;
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signature_scheme_t scheme;
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identification_t *id;
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/* TODO-IKEv1: currently RSA only */
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type = KEY_RSA;
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scheme = SIGN_RSA_EMSA_PKCS1_NULL;
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sig_payload = (hash_payload_t*)message->get_payload(message, SIGNATURE_V1);
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if (!sig_payload)
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{
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DBG1(DBG_IKE, "SIG payload missing in message");
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return FALSE;
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}
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id = this->ike_sa->get_other_id(this->ike_sa);
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this->dh->get_my_public_value(this->dh, &dh);
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keymat = (keymat_v1_t*)this->ike_sa->get_keymat(this->ike_sa);
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hash = keymat->get_hash(keymat, !this->initiator, this->dh_value, dh,
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this->ike_sa->get_id(this->ike_sa), this->sa_payload, id);
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free(dh.ptr);
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sig = sig_payload->get_hash(sig_payload);
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auth = this->ike_sa->get_auth_cfg(this->ike_sa, FALSE);
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enumerator = lib->credmgr->create_public_enumerator(lib->credmgr, type,
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id, auth);
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while (enumerator->enumerate(enumerator, &public, ¤t_auth))
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{
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if (public->verify(public, scheme, hash, sig))
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{
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DBG1(DBG_IKE, "authentication of '%Y' with %N successful",
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id, key_type_names, type);
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status = SUCCESS;
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auth->merge(auth, current_auth, FALSE);
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auth->add(auth, AUTH_RULE_AUTH_CLASS, AUTH_CLASS_PUBKEY);
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break;
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}
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else
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{
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DBG1(DBG_IKE, "signature validation failed, looking for another key");
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status = FAILED;
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}
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}
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enumerator->destroy(enumerator);
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free(hash.ptr);
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if (status != SUCCESS)
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{
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DBG1(DBG_IKE, "no trusted %N public key found for '%Y'",
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key_type_names, type, id);
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}
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return status;
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}
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METHOD(authenticator_t, destroy, void,
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private_pubkey_v1_authenticator_t *this)
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{
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free(this);
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}
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/*
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* Described in header.
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*/
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pubkey_v1_authenticator_t *pubkey_v1_authenticator_create(ike_sa_t *ike_sa,
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bool initiator, diffie_hellman_t *dh,
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chunk_t dh_value, chunk_t sa_payload)
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{
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private_pubkey_v1_authenticator_t *this;
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INIT(this,
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.public = {
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.authenticator = {
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.build = _build,
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.process = _process,
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.is_mutual = (void*)return_false,
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.destroy = _destroy,
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},
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},
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.ike_sa = ike_sa,
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.initiator = initiator,
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.dh = dh,
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.dh_value = dh_value,
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.sa_payload = sa_payload,
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);
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return &this->public;
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}
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@@ -0,0 +1,52 @@
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/*
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* Copyright (C) 2011 Martin Willi
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* Copyright (C) 2011 revosec AG
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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 pubkey_v1_authenticator pubkey_v1_authenticator
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* @{ @ingroup authenticators
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*/
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#ifndef PUBKEY_V1_AUTHENTICATOR_H_
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#define PUBKEY_V1_AUTHENTICATOR_H_
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typedef struct pubkey_v1_authenticator_t pubkey_v1_authenticator_t;
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#include <sa/authenticators/authenticator.h>
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/**
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* Implementation of authenticator_t using public keys for IKEv1.
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*/
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struct pubkey_v1_authenticator_t {
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/**
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* Implemented authenticator_t interface.
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*/
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authenticator_t authenticator;
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};
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/**
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* Create an authenticator to build and verify public key signatures.
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*
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* @param ike_sa associated IKE_SA
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* @param dh diffie hellman key exchange
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* @param dh_value others public diffie hellman value
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* @param sa_payload generated SA payload data, without payload header
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* @return pubkey authenticator
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*/
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pubkey_v1_authenticator_t *pubkey_v1_authenticator_create(ike_sa_t *ike_sa,
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bool initiator, diffie_hellman_t *dh,
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chunk_t dh_value, chunk_t sa_payload);
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#endif /** PUBKEY_V1_AUTHENTICATOR_H_ @}*/
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