moved typedefs to beginning of files to solve some include problems

splitted authenticator to have a separate implementation for each auth_method_t using va_copy to clone va_lists, should fix proplems on AMD64 some other cleanups
2006-10-30 14:07:05 +00:00
parent 09cb5472bc
commit 382b481795
119 changed files with 1196 additions and 1120 deletions
@@ -0,0 +1,194 @@
+/**
+ * @file authenticator.c
+ *
+ * @brief Implementation of authenticator_t.
+ *
+ */
+
+/*
+ * Copyright (C) 2005-2006 Martin Willi
+ * Copyright (C) 2005 Jan Hutter
+ * 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 <string.h>
+
+#include "rsa_authenticator.h"
+
+#include <config/policies/policy.h>
+#include <daemon.h>
+
+
+typedef struct private_rsa_authenticator_t private_rsa_authenticator_t;
+
+/**
+ * Private data of an rsa_authenticator_t object.
+ */
+struct private_rsa_authenticator_t {
+	
+	/**
+	 * Public authenticator_t interface.
+	 */
+	rsa_authenticator_t public;
+	
+	/**
+	 * Assigned IKE_SA
+	 */
+	ike_sa_t *ike_sa;
+};
+
+/**
+ * Builds the octets to be signed as described in section 2.15 of RFC 4306
+ */
+chunk_t build_tbs_octets(private_rsa_authenticator_t *this, chunk_t ike_sa_init,
+						 chunk_t nonce, identification_t *id, prf_t *prf)
+{
+	u_int8_t id_header_buf[] = {0x00, 0x00, 0x00, 0x00};
+	chunk_t id_header = chunk_from_buf(id_header_buf);
+	chunk_t id_with_header, id_prfd, id_encoding;
+	
+	id_header_buf[0] = id->get_type(id);
+	id_encoding = id->get_encoding(id);
+	
+	id_with_header = chunk_cat("cc", id_header, id_encoding);
+	prf->allocate_bytes(prf, id_with_header, &id_prfd);
+	chunk_free(&id_with_header);
+	
+	return chunk_cat("ccm", ike_sa_init, nonce, id_prfd);
+}
+
+/**
+ * Implementation of authenticator_t.verify.
+ */
+static status_t verify(private_rsa_authenticator_t *this, chunk_t ike_sa_init,
+ 					   chunk_t my_nonce, auth_payload_t *auth_payload)
+{
+	status_t status;
+	chunk_t auth_data, octets;
+	rsa_public_key_t *public_key;
+	identification_t *other_id;
+	
+	other_id = this->ike_sa->get_other_id(this->ike_sa);
+	
+	if (auth_payload->get_auth_method(auth_payload) != AUTH_RSA)
+	{
+		return INVALID_ARG;
+	}
+	auth_data = auth_payload->get_data(auth_payload);
+	public_key = charon->credentials->get_trusted_public_key(charon->credentials,
+															 other_id);
+	if (public_key == NULL)
+	{
+		DBG1(DBG_IKE, "no RSA public key found for '%D'", other_id);
+		return NOT_FOUND;
+	}
+	octets = build_tbs_octets(this, ike_sa_init, my_nonce, other_id,
+							  this->ike_sa->get_auth_verify(this->ike_sa));
+	status = public_key->verify_emsa_pkcs1_signature(public_key, octets, auth_data);
+	chunk_free(&octets);
+	
+	if (status != SUCCESS)
+	{
+		DBG1(DBG_IKE, "RSA signature verification failed");
+		return status;
+	}
+	
+	DBG1(DBG_IKE, "authentication of '%D' with %N successful",
+		 other_id, auth_method_names, AUTH_RSA);
+	return SUCCESS;
+}
+
+/**
+ * Implementation of authenticator_t.build.
+ */
+static status_t build(private_rsa_authenticator_t *this, chunk_t ike_sa_init,
+					  chunk_t other_nonce, auth_payload_t **auth_payload)
+{
+	chunk_t chunk;
+	chunk_t octets;
+	chunk_t auth_data;
+	status_t status;
+	rsa_public_key_t *my_pubkey;
+	rsa_private_key_t *my_key;
+	identification_t *my_id;
+
+	my_id = this->ike_sa->get_my_id(this->ike_sa);
+	DBG1(DBG_IKE, "authentication of '%D' with %N (myself)",
+		 my_id, auth_method_names, AUTH_RSA);
+	DBG2(DBG_IKE, "looking for RSA public key belonging to '%D'", my_id);
+
+	my_pubkey = charon->credentials->get_rsa_public_key(charon->credentials, my_id);
+	if (my_pubkey == NULL)
+	{
+		DBG1(DBG_IKE, "no RSA public key found for '%D'", my_id);
+		return NOT_FOUND;
+	}
+	DBG2(DBG_IKE, "matching RSA public key found");
+	chunk = my_pubkey->get_keyid(my_pubkey);
+	DBG2(DBG_IKE, "looking for RSA private key with keyid %#B", &chunk);
+	my_key = charon->credentials->get_rsa_private_key(charon->credentials, my_pubkey);
+	if (my_key == NULL)
+	{
+		DBG1(DBG_IKE, "no RSA private key found with for %D with keyid %#B",
+			 my_id, &chunk);
+		return NOT_FOUND;
+	}
+	DBG2(DBG_IKE, "matching RSA private key found");
+
+	octets = build_tbs_octets(this, ike_sa_init, other_nonce, my_id,
+							  this->ike_sa->get_auth_build(this->ike_sa));
+	status = my_key->build_emsa_pkcs1_signature(my_key, HASH_SHA1, octets, &auth_data);
+	chunk_free(&octets);
+
+	if (status != SUCCESS)
+	{
+		my_key->destroy(my_key);
+		DBG1(DBG_IKE, "build signature of SHA1 hash failed");
+		return status;
+	}
+	DBG2(DBG_IKE, "successfully signed with RSA private key");
+	
+	*auth_payload = auth_payload_create();
+	(*auth_payload)->set_auth_method(*auth_payload, AUTH_RSA);
+	(*auth_payload)->set_data(*auth_payload, auth_data);
+	
+	my_key->destroy(my_key);
+	chunk_free(&auth_data);
+	return SUCCESS;
+}
+
+/**
+ * Implementation of authenticator_t.destroy.
+ */
+static void destroy(private_rsa_authenticator_t *this)
+{
+	free(this);
+}
+
+/*
+ * Described in header.
+ */
+rsa_authenticator_t *rsa_authenticator_create(ike_sa_t *ike_sa)
+{
+	private_rsa_authenticator_t *this = malloc_thing(private_rsa_authenticator_t);
+	
+	/* public functions */
+	this->public.authenticator_interface.verify = (status_t(*)(authenticator_t*,chunk_t,chunk_t,auth_payload_t*))verify;
+	this->public.authenticator_interface.build = (status_t(*)(authenticator_t*,chunk_t,chunk_t,auth_payload_t**))build;
+	this->public.authenticator_interface.destroy = (void(*)(authenticator_t*))destroy;
+	
+	/* private data */
+	this->ike_sa = ike_sa;
+	
+	return &this->public;
+}