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authorRené Mayrhofer <rene@mayrhofer.eu.org>2011-03-05 09:20:09 +0100
committerRené Mayrhofer <rene@mayrhofer.eu.org>2011-03-05 09:20:09 +0100
commit568905f488e63e28778f87ac0e38d845f45bae79 (patch)
treed9969a147e36413583ff4bc75542d34c955f8823 /src/conftest/hooks/rebuild_auth.c
parentf73fba54dc8b30c6482e1e8abf15bbf455592fcd (diff)
downloadvyos-strongswan-568905f488e63e28778f87ac0e38d845f45bae79.tar.gz
vyos-strongswan-568905f488e63e28778f87ac0e38d845f45bae79.zip
Imported Upstream version 4.5.1
Diffstat (limited to 'src/conftest/hooks/rebuild_auth.c')
-rw-r--r--src/conftest/hooks/rebuild_auth.c243
1 files changed, 243 insertions, 0 deletions
diff --git a/src/conftest/hooks/rebuild_auth.c b/src/conftest/hooks/rebuild_auth.c
new file mode 100644
index 000000000..993c952e0
--- /dev/null
+++ b/src/conftest/hooks/rebuild_auth.c
@@ -0,0 +1,243 @@
+/*
+ * Copyright (C) 2010 Martin Willi
+ * Copyright (C) 2010 revosec AG
+ *
+ * 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 "hook.h"
+
+#include <encoding/generator.h>
+#include <encoding/payloads/nonce_payload.h>
+#include <encoding/payloads/auth_payload.h>
+#include <encoding/payloads/id_payload.h>
+
+typedef struct private_rebuild_auth_t private_rebuild_auth_t;
+
+/**
+ * Private data of an rebuild_auth_t object.
+ */
+struct private_rebuild_auth_t {
+
+ /**
+ * Implements the hook_t interface.
+ */
+ hook_t hook;
+
+ /**
+ * Our IKE_SA_INIT data, required to rebuild AUTH
+ */
+ chunk_t ike_init;
+
+ /**
+ * Received NONCE, required to rebuild AUTH
+ */
+ chunk_t nonce;
+
+ /**
+ * ID to use for key lookup, if not from IDi
+ */
+ identification_t *id;
+};
+
+/**
+ * Rebuild our AUTH data
+ */
+static bool rebuild_auth(private_rebuild_auth_t *this, ike_sa_t *ike_sa,
+ message_t *message)
+{
+ enumerator_t *enumerator;
+ chunk_t octets, auth_data;
+ private_key_t *private;
+ auth_cfg_t *auth;
+ payload_t *payload;
+ auth_payload_t *auth_payload;
+ auth_method_t auth_method;
+ signature_scheme_t scheme;
+ keymat_t *keymat;
+ identification_t *id;
+ char reserved[3];
+ generator_t *generator;
+ chunk_t data;
+ u_int32_t *lenpos;
+
+ payload = message->get_payload(message,
+ message->get_request(message) ? ID_INITIATOR : ID_RESPONDER);
+ if (!payload)
+ {
+ DBG1(DBG_CFG, "ID payload not found to rebuild AUTH");
+ return FALSE;
+ }
+
+ generator = generator_create();
+ generator->generate_payload(generator, payload);
+ data = generator->get_chunk(generator, &lenpos);
+ if (data.len < 8)
+ {
+ DBG1(DBG_CFG, "ID payload invalid to rebuild AUTH");
+ generator->destroy(generator);
+ return FALSE;
+ }
+ memcpy(reserved, data.ptr + 5, 3);
+ id = identification_create_from_encoding(data.ptr[4], chunk_skip(data, 8));
+ generator->destroy(generator);
+
+ auth = auth_cfg_create();
+ private = lib->credmgr->get_private(lib->credmgr, KEY_ANY,
+ this->id ?: id, auth);
+ auth->destroy(auth);
+ if (private == NULL)
+ {
+ DBG1(DBG_CFG, "no private key found for '%Y' to rebuild AUTH",
+ this->id ?: id);
+ id->destroy(id);
+ return FALSE;
+ }
+
+ switch (private->get_type(private))
+ {
+ case KEY_RSA:
+ scheme = SIGN_RSA_EMSA_PKCS1_SHA1;
+ auth_method = AUTH_RSA;
+ break;
+ case KEY_ECDSA:
+ /* we try to deduct the signature scheme from the keysize */
+ switch (private->get_keysize(private))
+ {
+ case 256:
+ scheme = SIGN_ECDSA_256;
+ auth_method = AUTH_ECDSA_256;
+ break;
+ case 384:
+ scheme = SIGN_ECDSA_384;
+ auth_method = AUTH_ECDSA_384;
+ break;
+ case 521:
+ scheme = SIGN_ECDSA_521;
+ auth_method = AUTH_ECDSA_521;
+ break;
+ default:
+ DBG1(DBG_CFG, "%d bit ECDSA private key size not supported",
+ private->get_keysize(private));
+ id->destroy(id);
+ return FALSE;
+ }
+ break;
+ default:
+ DBG1(DBG_CFG, "private key of type %N not supported",
+ key_type_names, private->get_type(private));
+ id->destroy(id);
+ return FALSE;
+ }
+ keymat = ike_sa->get_keymat(ike_sa);
+ octets = keymat->get_auth_octets(keymat, FALSE, this->ike_init,
+ this->nonce, id, reserved);
+ if (!private->sign(private, scheme, octets, &auth_data))
+ {
+ chunk_free(&octets);
+ private->destroy(private);
+ id->destroy(id);
+ return FALSE;
+ }
+ auth_payload = auth_payload_create();
+ auth_payload->set_auth_method(auth_payload, auth_method);
+ auth_payload->set_data(auth_payload, auth_data);
+ chunk_free(&auth_data);
+ chunk_free(&octets);
+ private->destroy(private);
+
+ enumerator = message->create_payload_enumerator(message);
+ while (enumerator->enumerate(enumerator, &payload))
+ {
+ if (payload->get_type(payload) == AUTHENTICATION)
+ {
+ message->remove_payload_at(message, enumerator);
+ payload->destroy(payload);
+ }
+ }
+ enumerator->destroy(enumerator);
+
+ message->add_payload(message, (payload_t*)auth_payload);
+ DBG1(DBG_CFG, "rebuilding AUTH payload for '%Y' with %N",
+ id, auth_method_names, auth_method);
+ id->destroy(id);
+ return TRUE;
+}
+
+METHOD(listener_t, message, bool,
+ private_rebuild_auth_t *this, ike_sa_t *ike_sa, message_t *message,
+ bool incoming)
+{
+ if (!incoming && message->get_message_id(message) == 1)
+ {
+ rebuild_auth(this, ike_sa, message);
+ }
+ if (message->get_exchange_type(message) == IKE_SA_INIT)
+ {
+ if (incoming)
+ {
+ nonce_payload_t *nonce;
+
+ nonce = (nonce_payload_t*)message->get_payload(message, NONCE);
+ if (nonce)
+ {
+ free(this->nonce.ptr);
+ this->nonce = nonce->get_nonce(nonce);
+ }
+ }
+ else
+ {
+ packet_t *packet;
+
+ if (message->generate(message, NULL, &packet) == SUCCESS)
+ {
+ free(this->ike_init.ptr);
+ this->ike_init = chunk_clone(packet->get_data(packet));
+ packet->destroy(packet);
+ }
+ }
+ }
+ return TRUE;
+}
+
+METHOD(hook_t, destroy, void,
+ private_rebuild_auth_t *this)
+{
+ free(this->ike_init.ptr);
+ free(this->nonce.ptr);
+ DESTROY_IF(this->id);
+ free(this);
+}
+
+/**
+ * Create the IKE_AUTH fill hook
+ */
+hook_t *rebuild_auth_hook_create(char *name)
+{
+ private_rebuild_auth_t *this;
+ char *id;
+
+ INIT(this,
+ .hook = {
+ .listener = {
+ .message = _message,
+ },
+ .destroy = _destroy,
+ },
+ );
+ id = conftest->test->get_str(conftest->test, "hooks.%s.key", NULL, name);
+ if (id)
+ {
+ this->id = identification_create_from_string(id);
+ }
+
+ return &this->hook;
+}