Author: Pekka Riikonen <priikone@poseidon.pspt.fi>
- Copyright (C) 1997 - 2000 Pekka Riikonen
+ Copyright (C) 1997 - 2001 Pekka Riikonen
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
/*
* Server side of the protocols.
*/
-/*
- * $Id$
- * $Log$
- * Revision 1.6 2000/07/12 05:59:41 priikone
- * Major rewrite of ID Cache system. Support added for the new
- * ID cache system. Major rewrite of ID List stuff on server. All
- * SilcXXXList's are now called SilcXXXEntry's and they are pointers
- * by default. A lot rewritten ID list functions.
- *
- * Revision 1.5 2000/07/10 05:42:14 priikone
- * Support for public key encoding functions added.
- *
- * Revision 1.4 2000/07/07 06:55:59 priikone
- * Added SILC style public key support and made server to use
- * it at all time.
- *
- * Revision 1.3 2000/07/06 07:15:31 priikone
- * Cleaner code fro password and public key authentication.
- * Deprecated old `channel_auth' protocol.
- *
- * Revision 1.2 2000/07/05 06:13:04 priikone
- * Support for SILC style public keys added.
- *
- * Revision 1.1.1.1 2000/06/27 11:36:56 priikone
- * Imported from internal CVS/Added Log headers.
- *
- *
- */
+/* $Id$ */
#include "serverincludes.h"
#include "server_internal.h"
SILC_TASK_CALLBACK(silc_server_protocol_connection_auth);
SILC_TASK_CALLBACK(silc_server_protocol_key_exchange);
-/* SILC client protocol list */
-const SilcProtocolObject silc_protocol_list[] =
-{
- { SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
- silc_server_protocol_connection_auth },
- { SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
- silc_server_protocol_key_exchange },
-
- { SILC_PROTOCOL_SERVER_NONE, NULL },
-};
+extern char *silc_version_string;
/*
* Key Exhange protocol functions
/* Sets the negotiated key material into use for particular connection. */
-static void silc_server_protocol_ke_set_keys(SilcSKE ske,
- SilcSocketConnection sock,
- SilcSKEKeyMaterial *keymat,
- SilcCipher cipher,
- SilcPKCS pkcs,
- SilcHash hash,
- int is_responder)
+static int silc_server_protocol_ke_set_keys(SilcSKE ske,
+ SilcSocketConnection sock,
+ SilcSKEKeyMaterial *keymat,
+ SilcCipher cipher,
+ SilcPKCS pkcs,
+ SilcHash hash,
+ int is_responder)
{
SilcUnknownEntry conn_data;
+ SilcIDListData idata;
SilcHash nhash;
SILC_LOG_DEBUG(("Setting new key into use"));
conn_data = silc_calloc(1, sizeof(*conn_data));
+ idata = (SilcIDListData)conn_data;
/* Allocate cipher to be used in the communication */
- silc_cipher_alloc(cipher->cipher->name, &conn_data->send_key);
- silc_cipher_alloc(cipher->cipher->name, &conn_data->receive_key);
+ if (!silc_cipher_alloc(cipher->cipher->name, &idata->send_key)) {
+ silc_free(conn_data);
+ return FALSE;
+ }
+ if (!silc_cipher_alloc(cipher->cipher->name, &idata->receive_key)) {
+ silc_free(conn_data);
+ return FALSE;
+ }
if (is_responder == TRUE) {
- conn_data->send_key->cipher->set_key(conn_data->send_key->context,
- keymat->receive_enc_key,
- keymat->enc_key_len);
- conn_data->send_key->set_iv(conn_data->send_key, keymat->receive_iv);
- conn_data->receive_key->cipher->set_key(conn_data->receive_key->context,
- keymat->send_enc_key,
- keymat->enc_key_len);
- conn_data->receive_key->set_iv(conn_data->receive_key, keymat->send_iv);
+ idata->send_key->cipher->set_key(idata->send_key->context,
+ keymat->receive_enc_key,
+ keymat->enc_key_len);
+ idata->send_key->set_iv(idata->send_key, keymat->receive_iv);
+ idata->receive_key->cipher->set_key(idata->receive_key->context,
+ keymat->send_enc_key,
+ keymat->enc_key_len);
+ idata->receive_key->set_iv(idata->receive_key, keymat->send_iv);
} else {
- conn_data->send_key->cipher->set_key(conn_data->send_key->context,
- keymat->send_enc_key,
- keymat->enc_key_len);
- conn_data->send_key->set_iv(conn_data->send_key, keymat->send_iv);
- conn_data->receive_key->cipher->set_key(conn_data->receive_key->context,
- keymat->receive_enc_key,
- keymat->enc_key_len);
- conn_data->receive_key->set_iv(conn_data->receive_key, keymat->receive_iv);
+ idata->send_key->cipher->set_key(idata->send_key->context,
+ keymat->send_enc_key,
+ keymat->enc_key_len);
+ idata->send_key->set_iv(idata->send_key, keymat->send_iv);
+ idata->receive_key->cipher->set_key(idata->receive_key->context,
+ keymat->receive_enc_key,
+ keymat->enc_key_len);
+ idata->receive_key->set_iv(idata->receive_key, keymat->receive_iv);
}
/* Allocate PKCS to be used */
/* XXX Do we ever need to allocate PKCS for the connection??
If yes, we need to change KE protocol to get the initiators
public key. */
- silc_pkcs_alloc(pkcs->pkcs->name, &conn_data->pkcs);
- conn_data->public_key = silc_pkcs_public_key_alloc(XXX);
- silc_pkcs_set_public_key(conn_data->pkcs, ske->ke2_payload->pk_data,
+ silc_pkcs_alloc(pkcs->pkcs->name, &idata->pkcs);
+ idata->public_key = silc_pkcs_public_key_alloc(XXX);
+ silc_pkcs_set_public_key(idata->pkcs, ske->ke2_payload->pk_data,
ske->ke2_payload->pk_len);
#endif
/* Save HMAC key to be used in the communication. */
- silc_hash_alloc(hash->hash->name, &nhash);
- silc_hmac_alloc(nhash, &conn_data->hmac);
- conn_data->hmac_key_len = keymat->hmac_key_len;
- conn_data->hmac_key = silc_calloc(conn_data->hmac_key_len,
- sizeof(unsigned char));
- memcpy(conn_data->hmac_key, keymat->hmac_key, keymat->hmac_key_len);
+ if (!silc_hash_alloc(hash->hash->name, &nhash)) {
+ silc_cipher_free(idata->send_key);
+ silc_cipher_free(idata->receive_key);
+ silc_free(conn_data);
+ return FALSE;
+ }
+ silc_hmac_alloc(nhash, &idata->hmac);
+ silc_hmac_set_key(idata->hmac, keymat->hmac_key, keymat->hmac_key_len);
sock->user_data = (void *)conn_data;
+
+ return TRUE;
+}
+
+/* Check remote host version string */
+
+SilcSKEStatus silc_ske_check_version(SilcSKE ske, unsigned char *version,
+ unsigned int len)
+{
+ SilcSKEStatus status = SILC_SKE_STATUS_OK;
+
+ /* Check for initial version string */
+ if (!strstr(version, "SILC-1.0-"))
+ status = SILC_SKE_STATUS_BAD_VERSION;
+
+ /* Check software version */
+
+ if (len < strlen(silc_version_string))
+ status = SILC_SKE_STATUS_BAD_VERSION;
+
+ /* XXX for now there is no other tests due to the abnormal version
+ string that is used */
+
+ return status;
}
/* Performs key exchange protocol. This is used for both initiator
/* Allocate Key Exchange object */
ske = silc_ske_alloc();
ctx->ske = ske;
+ ske->rng = server->rng;
if (ctx->responder == TRUE) {
/* Start the key exchange by processing the received security
properties packet from initiator. */
status = silc_ske_responder_start(ske, ctx->rng, ctx->sock,
- ctx->packet, NULL, NULL);
+ silc_version_string,
+ ctx->packet->buffer, NULL, NULL);
} else {
SilcSKEStartPayload *start_payload;
/* Assemble security properties. */
- silc_ske_assemble_security_properties(ske, &start_payload);
+ silc_ske_assemble_security_properties(ske, SILC_SKE_SP_FLAG_NONE,
+ silc_version_string,
+ &start_payload);
/* Start the key exchange by sending our security properties
to the remote end. */
paylaod reply we just got from the responder. The callback
function will receive the processed payload where we will
save it. */
- status =
- silc_ske_initiator_phase_1(ctx->ske,
- ctx->packet,
- NULL, NULL);
+ status = silc_ske_initiator_phase_1(ctx->ske, ctx->packet->buffer,
+ NULL, NULL);
}
if (status != SILC_SKE_STATUS_OK) {
/* Process the received Key Exchange 1 Payload packet from
the initiator. This also creates our parts of the Diffie
Hellman algorithm. */
- status =
- silc_ske_responder_phase_2(ctx->ske, ctx->packet, NULL, NULL);
+ status = silc_ske_responder_phase_2(ctx->ske, ctx->packet->buffer,
+ NULL, NULL);
} else {
/* Call the Phase-2 function. This creates Diffie Hellman
key exchange parameters and sends our public part inside
Key Exhange 1 Payload to the responder. */
status =
silc_ske_initiator_phase_2(ctx->ske,
+ server->public_key,
silc_server_protocol_ke_send_packet,
context);
}
} else {
/* Finish the protocol. This verifies the Key Exchange 2 payload
sent by responder. */
- status =
- silc_ske_initiator_finish(ctx->ske,
- ctx->packet, NULL, NULL, NULL, NULL);
+ status = silc_ske_initiator_finish(ctx->ske, ctx->packet->buffer,
+ NULL, NULL, NULL, NULL);
}
if (status != SILC_SKE_STATUS_OK) {
protocol->state = SILC_PROTOCOL_STATE_END;
}
break;
+
case SILC_PROTOCOL_STATE_END:
{
/*
* End protocol
*/
SilcSKEKeyMaterial *keymat;
+ int key_len = silc_cipher_get_key_len(ctx->ske->prop->cipher, NULL);
+ int hash_len = ctx->ske->prop->hash->hash->hash_len;
/* Send Ok to the other end if we are responder. If we are
initiator we have sent this already. */
/* Process the key material */
keymat = silc_calloc(1, sizeof(*keymat));
- silc_ske_process_key_material(ctx->ske, 16, (16 * 8), 16, keymat);
+ silc_ske_process_key_material(ctx->ske, 16, key_len, hash_len,
+ keymat);
/* Take the new keys into use. */
- silc_server_protocol_ke_set_keys(ctx->ske, ctx->sock, keymat,
- ctx->ske->prop->cipher,
- ctx->ske->prop->pkcs,
- ctx->ske->prop->hash,
- ctx->responder);
+ if (!silc_server_protocol_ke_set_keys(ctx->ske, ctx->sock, keymat,
+ ctx->ske->prop->cipher,
+ ctx->ske->prop->pkcs,
+ ctx->ske->prop->hash,
+ ctx->responder)) {
+ protocol->state = SILC_PROTOCOL_STATE_ERROR;
+ protocol->execute(server->timeout_queue, 0, protocol, fd, 0, 300000);
+ silc_ske_free_key_material(keymat);
+ return;
+ }
+
+ silc_ske_free_key_material(keymat);
/* Unregister the timeout task since the protocol has ended.
This was the timeout task to be executed if the protocol is
silc_protocol_free(protocol);
}
break;
+
case SILC_PROTOCOL_STATE_ERROR:
/*
* Error occured
*/
+ /* Send abort notification */
+ silc_ske_abort(ctx->ske, ctx->ske->status,
+ silc_server_protocol_ke_send_packet,
+ context);
+
+ /* Unregister the timeout task since the protocol has ended.
+ This was the timeout task to be executed if the protocol is
+ not completed fast enough. */
+ if (ctx->timeout_task)
+ silc_task_unregister(server->timeout_queue, ctx->timeout_task);
+
+ /* On error the final callback is always called. */
+ if (protocol->final_callback)
+ protocol->execute_final(server->timeout_queue, 0, protocol, fd);
+ else
+ silc_protocol_free(protocol);
+ break;
+
+ case SILC_PROTOCOL_STATE_FAILURE:
+ /*
+ * We have received failure from remote
+ */
+
/* Unregister the timeout task since the protocol has ended.
This was the timeout task to be executed if the protocol is
not completed fast enough. */
else
silc_protocol_free(protocol);
break;
+
case SILC_PROTOCOL_STATE_UNKNOWN:
break;
}
unsigned short conn_type;
unsigned char *auth_data;
- SILC_LOG_INFO(("Performing authentication protocol for %s",
- ctx->sock->hostname ? ctx->sock->hostname :
- ctx->sock->ip));
+ SILC_LOG_INFO(("Performing authentication protocol for %s (%s)",
+ ctx->sock->hostname, ctx->sock->ip));
/* Parse the received authentication data packet. The received
payload is Connection Auth Payload. */
- silc_buffer_unformat(ctx->packet,
- SILC_STR_UI_SHORT(&payload_len),
- SILC_STR_UI_SHORT(&conn_type),
- SILC_STR_END);
+ ret = silc_buffer_unformat(ctx->packet->buffer,
+ SILC_STR_UI_SHORT(&payload_len),
+ SILC_STR_UI_SHORT(&conn_type),
+ SILC_STR_END);
+ if (ret == -1) {
+ SILC_LOG_DEBUG(("Bad payload in authentication packet"));
+ protocol->state = SILC_PROTOCOL_STATE_ERROR;
+ protocol->execute(server->timeout_queue, 0, protocol, fd, 0, 300000);
+ return;
+ }
- if (payload_len != ctx->packet->len) {
- SILC_LOG_ERROR(("Bad payload in authentication packet"));
+ if (payload_len != ctx->packet->buffer->len) {
SILC_LOG_DEBUG(("Bad payload in authentication packet"));
protocol->state = SILC_PROTOCOL_STATE_ERROR;
protocol->execute(server->timeout_queue, 0, protocol, fd, 0, 300000);
if (conn_type < SILC_SOCKET_TYPE_CLIENT ||
conn_type > SILC_SOCKET_TYPE_ROUTER) {
SILC_LOG_ERROR(("Bad connection type %d", conn_type));
- SILC_LOG_DEBUG(("Bad connection type %d", conn_type));
protocol->state = SILC_PROTOCOL_STATE_ERROR;
protocol->execute(server->timeout_queue, 0, protocol, fd, 0, 300000);
return;
if (payload_len > 0) {
/* Get authentication data */
- silc_buffer_pull(ctx->packet, 4);
- silc_buffer_unformat(ctx->packet,
- SILC_STR_UI_XNSTRING_ALLOC(&auth_data,
- payload_len),
- SILC_STR_END);
+ silc_buffer_pull(ctx->packet->buffer, 4);
+ ret = silc_buffer_unformat(ctx->packet->buffer,
+ SILC_STR_UI_XNSTRING_ALLOC(&auth_data,
+ payload_len),
+ SILC_STR_END);
+ if (ret == -1) {
+ SILC_LOG_DEBUG(("Bad payload in authentication packet"));
+ protocol->state = SILC_PROTOCOL_STATE_ERROR;
+ protocol->execute(server->timeout_queue, 0,
+ protocol, fd, 0, 300000);
+ return;
+ }
} else {
auth_data = NULL;
}
/* Remote end is client */
if (conn_type == SILC_SOCKET_TYPE_CLIENT) {
- SilcConfigServerSectionClientConnection *client = NULL;
+ SilcServerConfigSectionClientConnection *client = NULL;
client =
- silc_config_server_find_client_conn(server->config,
+ silc_server_config_find_client_conn(server->config,
ctx->sock->ip,
ctx->sock->port);
if (!client)
client =
- silc_config_server_find_client_conn(server->config,
+ silc_server_config_find_client_conn(server->config,
ctx->sock->hostname,
ctx->sock->port);
if (client) {
switch(client->auth_meth) {
- case SILC_PROTOCOL_CONN_AUTH_NONE:
+ case SILC_AUTH_NONE:
/* No authentication required */
SILC_LOG_DEBUG(("No authentication required"));
break;
- case SILC_PROTOCOL_CONN_AUTH_PASSWORD:
+ case SILC_AUTH_PASSWORD:
/* Password authentication */
SILC_LOG_DEBUG(("Password authentication"));
ret = silc_server_password_authentication(server, auth_data,
return;
break;
- case SILC_PROTOCOL_CONN_AUTH_PUBLIC_KEY:
+ case SILC_AUTH_PUBLIC_KEY:
/* Public key authentication */
SILC_LOG_DEBUG(("Public key authentication"));
ret = silc_server_public_key_authentication(server,
/* Remote end is server */
if (conn_type == SILC_SOCKET_TYPE_SERVER) {
- SilcConfigServerSectionServerConnection *serv = NULL;
+ SilcServerConfigSectionServerConnection *serv = NULL;
serv =
- silc_config_server_find_server_conn(server->config,
+ silc_server_config_find_server_conn(server->config,
ctx->sock->ip,
ctx->sock->port);
if (!serv)
serv =
- silc_config_server_find_server_conn(server->config,
+ silc_server_config_find_server_conn(server->config,
ctx->sock->hostname,
ctx->sock->port);
if (serv) {
switch(serv->auth_meth) {
- case SILC_PROTOCOL_CONN_AUTH_NONE:
+ case SILC_AUTH_NONE:
/* No authentication required */
SILC_LOG_DEBUG(("No authentication required"));
break;
- case SILC_PROTOCOL_CONN_AUTH_PASSWORD:
+ case SILC_AUTH_PASSWORD:
/* Password authentication */
SILC_LOG_DEBUG(("Password authentication"));
ret = silc_server_password_authentication(server, auth_data,
return;
break;
- case SILC_PROTOCOL_CONN_AUTH_PUBLIC_KEY:
+ case SILC_AUTH_PUBLIC_KEY:
/* Public key authentication */
SILC_LOG_DEBUG(("Public key authentication"));
ret = silc_server_public_key_authentication(server,
/* Remote end is router */
if (conn_type == SILC_SOCKET_TYPE_ROUTER) {
- SilcConfigServerSectionServerConnection *serv = NULL;
+ SilcServerConfigSectionServerConnection *serv = NULL;
serv =
- silc_config_server_find_router_conn(server->config,
+ silc_server_config_find_router_conn(server->config,
ctx->sock->ip,
ctx->sock->port);
if (!serv)
serv =
- silc_config_server_find_router_conn(server->config,
+ silc_server_config_find_router_conn(server->config,
ctx->sock->hostname,
ctx->sock->port);
if (serv) {
switch(serv->auth_meth) {
- case SILC_PROTOCOL_CONN_AUTH_NONE:
+ case SILC_AUTH_NONE:
/* No authentication required */
SILC_LOG_DEBUG(("No authentication required"));
break;
- case SILC_PROTOCOL_CONN_AUTH_PASSWORD:
+ case SILC_AUTH_PASSWORD:
/* Password authentication */
SILC_LOG_DEBUG(("Password authentication"));
ret = silc_server_password_authentication(server, auth_data,
return;
break;
- case SILC_PROTOCOL_CONN_AUTH_PUBLIC_KEY:
+ case SILC_AUTH_PUBLIC_KEY:
/* Public key authentication */
SILC_LOG_DEBUG(("Public key authentication"));
ret = silc_server_public_key_authentication(server,
unsigned int auth_data_len = 0;
switch(ctx->auth_meth) {
- case SILC_PROTOCOL_CONN_AUTH_NONE:
+ case SILC_AUTH_NONE:
/* No authentication required */
break;
- case SILC_PROTOCOL_CONN_AUTH_PASSWORD:
+ case SILC_AUTH_PASSWORD:
/* Password authentication */
if (ctx->auth_data && ctx->auth_data_len) {
auth_data = ctx->auth_data;
break;
- case SILC_PROTOCOL_CONN_AUTH_PUBLIC_KEY:
+ case SILC_AUTH_PUBLIC_KEY:
/* Public key authentication */
/* XXX TODO */
break;
/*
* End protocol
*/
+ unsigned char ok[4];
+
+ SILC_PUT32_MSB(SILC_AUTH_OK, ok);
- /* Succesfully authenticated */
- silc_server_packet_send(server, ctx->sock, SILC_PACKET_SUCCESS,
- 0, NULL, 0, TRUE);
+ /* Authentication failed */
+ silc_server_packet_send(server, ctx->sock, SILC_PACKET_SUCCESS,
+ 0, ok, 4, TRUE);
/* Unregister the timeout task since the protocol has ended.
This was the timeout task to be executed if the protocol is
case SILC_PROTOCOL_STATE_ERROR:
{
/*
- * Error
+ * Error. Send notify to remote.
*/
+ unsigned char error[4];
+
+ SILC_PUT32_MSB(SILC_AUTH_FAILED, error);
/* Authentication failed */
silc_server_packet_send(server, ctx->sock, SILC_PACKET_FAILURE,
- 0, NULL, 0, TRUE);
+ 0, error, 4, TRUE);
/* Unregister the timeout task since the protocol has ended.
This was the timeout task to be executed if the protocol is
silc_protocol_free(protocol);
}
break;
+
+ case SILC_PROTOCOL_STATE_FAILURE:
+ /*
+ * We have received failure from remote
+ */
+
+ /* Unregister the timeout task since the protocol has ended.
+ This was the timeout task to be executed if the protocol is
+ not completed fast enough. */
+ if (ctx->timeout_task)
+ silc_task_unregister(server->timeout_queue, ctx->timeout_task);
+
+ /* On error the final callback is always called. */
+ if (protocol->final_callback)
+ protocol->execute_final(server->timeout_queue, 0, protocol, fd);
+ else
+ silc_protocol_free(protocol);
+ break;
+
case SILC_PROTOCOL_STATE_UNKNOWN:
break;
}
}
+
+/* Registers protocols used in server. */
+
+void silc_server_protocols_register(void)
+{
+ silc_protocol_register(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
+ silc_server_protocol_connection_auth);
+ silc_protocol_register(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
+ silc_server_protocol_key_exchange);
+}
+
+/* Unregisters protocols */
+
+void silc_server_protocols_unregister(void)
+{
+ silc_protocol_unregister(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
+ silc_server_protocol_connection_auth);
+ silc_protocol_unregister(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
+ silc_server_protocol_key_exchange);
+}
projects / silc.git / blobdiff