--- /dev/null
+/*
+ * IRC - Internet Relay Chat, ircd/ssl.c
+ * Copyright (C) 2015 pk910 (Philipp Kreil)
+ *
+ * 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 1, or (at your option)
+ * any later version.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+/** @file
+ * @brief Implementation of functions for handling local clients.
+ * @version $Id$
+ */
+#include "config.h"
+
+#include "client.h"
+#include "ssl.h"
+#include "class.h"
+#include "ircd.h"
+#include "ircd_features.h"
+#include "ircd_log.h"
+#include "ircd_reply.h"
+#include "list.h"
+#include "msgq.h"
+#include "numeric.h"
+#include "s_conf.h"
+#include "s_debug.h"
+#include "send.h"
+#include "struct.h"
+
+/* #include <assert.h> -- Now using assert in ircd_log.h */
+#include <string.h>
+
+#ifndef IOV_MAX
+#define IOV_MAX 16 /**< minimum required length of an iovec array */
+#endif
+
+#if defined(HAVE_OPENSSL_SSL_H)
+
+static struct SSLPendingConections {
+ struct SSLConnection *connection;
+ struct SSLPendingConections *next;
+
+ void *data;
+ enum SSLDataType datatype;
+};
+
+struct SSLPendingConections *firstPendingConection = NULL;
+int ssl_is_initialized = 0;
+
+static void ssl_init() {
+ if(ssl_is_initialized)
+ return;
+ ssl_is_initialized = 1;
+ SSL_library_init();
+ OpenSSL_add_all_algorithms(); /* load & register all cryptos, etc. */
+ SSL_load_error_strings();
+}
+
+void ssl_free_connection(struct SSLConnection *connection) {
+ SSL_CTX *context = NULL;
+ if(FlagHas(&connection->flags, SSLFLAG_OUTGOING)) {
+ struct SSLOutConnection *outconn = (struct SSLOutConnection *)connection;
+ context = outconn->context;
+ }
+ SSL_shutdown(connection->session);
+ SSL_free(connection->session);
+ if(context)
+ SSL_CTX_free(context);
+ free(connection);
+}
+
+void ssl_free_listener(struct SSLListener *listener) {
+ SSL_CTX_free(listener->context);
+ free(listener);
+}
+
+static void ssl_handshake_completed(struct SSLConnection *connection, int success) {
+ struct SSLPendingConections *pending, *lastPending = NULL;
+ for(pending = firstPendingConection; pending; pending = pending->next) {
+ if(pending->connection == connection) {
+ if(lastPending)
+ lastPending->next = pending->next;
+ else
+ firstPendingConection = pending->next;
+ switch(pending->datatype) {
+ case SSLData_Client: {
+ struct Client *cptr = (struct Client *) pending->data;
+ if(success) {
+ if(FlagHas(&connection->flags, SSLFLAG_INCOMING))
+ start_auth(cptr);
+ else if(!completed_connection(cptr))
+ exit_client_msg(cptr, cptr, &me, "Registration failed.");
+ } else
+ exit_client_msg(cptr, cptr, &me, "SSL Handshake failed.");
+ }
+ break;
+ }
+ free(pending);
+ }
+ lastPending = pending;
+ }
+}
+
+static int ssl_handshake_outgoing(struct SSLConnection *connection) {
+ int ret = SSL_do_handshake(connection->session);
+ FlagClr(&connection->flags, SSLFLAG_HANDSHAKE_R);
+ FlagClr(&connection->flags, SSLFLAG_HANDSHAKE_W);
+
+ switch(SSL_get_error(connection->session, ret)) {
+ case SSL_ERROR_NONE:
+ FlagClr(&connection->flags, SSLFLAG_HANDSHAKE);
+ FlagSet(&connection->flags, SSLFLAG_READY);
+
+ ssl_handshake_completed(connection, 1);
+ break;
+ case SSL_ERROR_WANT_READ:
+ FlagSet(&connection->flags, SSLFLAG_HANDSHAKE_R);
+ break;
+ case SSL_ERROR_WANT_WRITE:
+ FlagSet(&connection->flags, SSLFLAG_HANDSHAKE_W);
+ break;
+ default:
+
+ break;
+ }
+}
+
+struct SSLConnection *ssl_create_connect(int fd, void *data, enum SSLDataType datatype) {
+ struct SSLOutConnection *connection = malloc(sizeof(*connection));
+ struct SSLConnection *sslconn = (struct SSLConnection *)connection;
+ struct SSLPendingConections *pending = NULL;
+
+ if(!connection)
+ return NULL;
+
+ if(!ssl_is_initialized)
+ ssl_init();
+
+ connection->context = SSL_CTX_new(SSLv23_client_method());
+ if(!connection->context) {
+ goto ssl_create_connect_failed;
+ }
+ connection->session = SSL_new(connection->context);
+ if(!connection->session) {
+ goto ssl_create_connect_failed;
+ }
+ if(!SSL_set_fd(connection->session, fd)) {
+ goto ssl_create_connect_failed;
+ }
+ SSL_set_connect_state(connection->session);
+ FlagSet(&connection->flags, SSLFLAG_OUTGOING);
+ FlagSet(&connection->flags, SSLFLAG_HANDSHAKE);
+
+ pending = malloc(sizeof(*pending));
+ if(!pending) {
+ goto ssl_create_connect_failed;
+ }
+ pending->connection = connection;
+ pending->next = firstPendingConection;
+ firstPendingConection = pending;
+
+ pending->data = data;
+ pending->datatype = datatype;
+
+ return sslconn;
+ssl_create_connect_failed:
+ free(connection);
+ return NULL;
+}
+
+void ssl_start_handshake_connect(struct SSLConnection *connection) {
+ ssl_handshake_outgoing(connection);
+}
+
+struct SSLListener *ssl_create_listener() {
+ if(!ssl_is_initialized)
+ ssl_init();
+
+ struct SSLListener *listener = calloc(1, sizeof(*listener));
+ listener->context = SSL_CTX_new(SSLv23_server_method());
+ if(!listener->context) {
+ goto ssl_create_listener_failed;
+ }
+
+ char *certfile = conf_get_local()->sslcertfile;
+ char *keyfile = conf_get_local()->sslkeyfile;
+ char *cafile = conf_get_local()->sslcafile;
+
+ if(!certfile) {
+ goto ssl_create_listener_failed;
+ }
+ if(!keyfile) {
+ keyfile = certfile;
+ }
+
+ /* load certificate */
+ if(SSL_CTX_use_certificate_file(listener->context, certfile, SSL_FILETYPE_PEM) <= 0) {
+ goto ssl_create_listener_failed;
+ }
+ /* load keyfile */
+ if(SSL_CTX_use_PrivateKey_file(listener->context, keyfile, SSL_FILETYPE_PEM) <= 0) {
+ goto ssl_create_listener_failed;
+ }
+ /* check certificate and keyfile */
+ if(!SSL_CTX_check_private_key(listener->context)) {
+ goto ssl_create_listener_failed;
+ }
+ /* load cafile */
+ if(cafile && cafile[0] && SSL_CTX_load_verify_locations(listener->context, cafile, NULL) <= 0) {
+ goto ssl_create_listener_failed;
+ }
+ FlagSet(&listener->flags, SSLFLAG_READY);
+ return listener;
+ssl_create_listener_failed:
+ free(listener);
+ return NULL;
+}
+
+static int ssl_handshake_incoming(struct SSLConnection *connection) {
+ int result = SSL_accept(connection->session);
+ FlagClr(&connection->flags, SSLFLAG_HANDSHAKE_R);
+ FlagClr(&connection->flags, SSLFLAG_HANDSHAKE_W);
+ switch(SSL_get_error(connection->session, result)) {
+ case SSL_ERROR_NONE:
+ FlagClr(&connection->flags, SSLFLAG_HANDSHAKE);
+ FlagSet(&connection->flags, SSLFLAG_READY);
+
+ ssl_handshake_completed(connection, 1);
+ return 0;
+ case SSL_ERROR_WANT_READ:
+ FlagSet(&connection->flags, SSLFLAG_HANDSHAKE_R);
+ return 1;
+ case SSL_ERROR_WANT_WRITE:
+ FlagSet(&connection->flags, SSLFLAG_HANDSHAKE_W);
+ return 1;
+ default:
+ //unset connection!
+ //Handshake error!
+ ssl_handshake_completed(connection, 0);
+ return 0;
+ }
+ return 0;
+}
+
+struct SSLConnection *ssl_start_handshake_listener(struct SSLListener *listener, int fd, void *data, enum SSLDataType datatype) {
+ if(!listener)
+ return NULL;
+ struct SSLPendingConections *pending = NULL;
+ struct SSLConnection *connection = malloc(sizeof(*connection));
+ connection->session = SSL_new(listener->context);
+ if(!connection->session) {
+ goto ssl_start_handshake_listener_failed;
+ }
+ if(!SSL_set_fd(connection->session, fd)) {
+ goto ssl_start_handshake_listener_failed;
+ }
+ FlagSet(&connection->flags, SSLFLAG_INCOMING);
+ FlagSet(&connection->flags, SSLFLAG_HANDSHAKE);
+ FlagSet(&connection->flags, SSLFLAG_HANDSHAKE_R);
+
+ pending = malloc(sizeof(*pending));
+ if(!pending) {
+ goto ssl_start_handshake_listener_failed;
+ }
+ pending->connection = connection;
+ pending->next = firstPendingConection;
+ firstPendingConection = pending;
+
+ pending->data = data;
+ pending->datatype = datatype;
+
+ ssl_handshake_incoming(connection);
+ return connection;
+ssl_start_handshake_listener_failed:
+ free(connection);
+ return NULL;
+}
+
+IOResult ssl_recv_decrypt(struct SSLConnection *connection, char *buf, unsigned int buflen, unsigned int *len) {
+ if(FlagHas(&connection->flags, SSLFLAG_HANDSHAKE)) {
+ if(FlagHas(&connection->flags, SSLFLAG_INCOMING)) {
+ ssl_handshake_incoming(connection);
+ return IO_BLOCKED;
+ }
+ if(FlagHas(&connection->flags, SSLFLAG_OUTGOING)) {
+ ssl_handshake_outgoing(connection);
+ return IO_BLOCKED;
+ }
+ }
+
+ *len = SSL_read(connection->session, buf, buflen);
+ FlagClr(&connection->flags, SSLFLAG_HANDSHAKE_R);
+ int err = SSL_get_error(connection->session, *len);
+ switch(err) {
+ case SSL_ERROR_NONE:
+ return IO_SUCCESS;
+ case SSL_ERROR_ZERO_RETURN:
+ return IO_FAILURE;
+ case SSL_ERROR_WANT_READ:
+ FlagSet(&connection->flags, SSLFLAG_HANDSHAKE_R);
+ return IO_BLOCKED;
+ case SSL_ERROR_WANT_WRITE:
+ FlagSet(&connection->flags, SSLFLAG_HANDSHAKE_W);
+ return IO_BLOCKED;
+ case SSL_ERROR_SYSCALL:
+ return IO_FAILURE;
+ default:
+ return IO_FAILURE;
+ }
+}
+
+static ssize_t ssl_writev(SSL *ssl, const struct iovec *vector, int count) {
+ char *buffer;
+ register char *bp;
+ size_t bytes, to_copy;
+ int i;
+
+ /* Find the total number of bytes to be written. */
+ bytes = 0;
+ for (i = 0; i < count; ++i)
+ bytes += vector[i].iov_len;
+
+ /* Allocate a temporary buffer to hold the data. */
+ buffer = (char *) alloca (bytes);
+
+ /* Copy the data into BUFFER. */
+ to_copy = bytes;
+ bp = buffer;
+ for (i = 0; i < count; ++i) {
+ size_t copy = ((vector[i].iov_len) > (to_copy) ? (to_copy) : (vector[i].iov_len));
+ memcpy ((void *) bp, (void *) vector[i].iov_base, copy);
+ bp += copy;
+ to_copy -= copy;
+ if (to_copy == 0)
+ break;
+ }
+ return SSL_write(ssl, buffer, bytes);
+}
+
+IOResult ssl_send_encrypt_plain(struct SSLConnection *connection, char* buf, int len) {
+ return SSL_write(connection->session, buf, len);
+}
+
+IOResult ssl_send_encrypt(struct SSLConnection *connection, struct MsgQ* buf, unsigned int *count_in, unsigned int *count_out) {
+ int res;
+ int count;
+ struct iovec iov[IOV_MAX];
+
+ assert(0 != buf);
+ assert(0 != count_in);
+ assert(0 != count_out);
+
+ *count_in = 0;
+ count = msgq_mapiov(buf, iov, IOV_MAX, count_in);
+ res = ssl_writev(connection->session, iov, count);
+
+ switch(SSL_get_error(connection->session, res)) {
+ case SSL_ERROR_NONE:
+ case SSL_ERROR_ZERO_RETURN:
+ *count_out = (unsigned) res;
+ return IO_SUCCESS;
+ case SSL_ERROR_WANT_READ:
+ FlagSet(&connection->flags, SSLFLAG_HANDSHAKE_R);
+ return IO_BLOCKED;
+ case SSL_ERROR_WANT_WRITE:
+ FlagSet(&connection->flags, SSLFLAG_HANDSHAKE_W);
+ return IO_BLOCKED;
+ default:
+ *count_out = 0;
+ return IO_FAILURE;
+ }
+}
+
+int ssl_connection_flush(struct SSLConnection *connection) {
+ if(connection) {
+ if(ssl_handshake(connection)) {
+ if(FlagHas(&connection->flags, SSLFLAG_INCOMING)) {
+ return ssl_handshake_incoming(connection);
+ }
+ if(FlagHas(&connection->flags, SSLFLAG_OUTGOING)) {
+ return ssl_handshake_outgoing(connection);
+ }
+ }
+ } else {
+ struct SSLPendingConections *curr, *last = NULL, *next;
+ for(curr = firstPendingConection; curr; curr = next) {
+ next = curr->next;
+ if(!ssl_connection_flush(curr->connection)) {
+ // connection is already in auth process here, curr is freed!
+ continue;
+ }
+ last = curr;
+ }
+ }
+ return 0;
+}
+
+#else
+void ssl_free_connection(struct SSLConnection *connection) {}
+void ssl_free_listener(struct SSLConnection *listener) {}
+struct SSLListener *ssl_create_listener() { return NULL; }
+struct SSLConnection *ssl_start_handshake_listener(struct SSLListener *listener, int fd, void *data, enum SSLDataType datatype) { return NULL; }
+IOResult ssl_recv_decrypt(struct SSLConnection *connection, char *buf, int *len) { return IO_FAILURE; }
+int ssl_connection_flush(struct SSLConnection *connection) { return 0; };
+#endif
+
projects / ircu2.10.12-pk.git / blobdiff