#include <freeradius-devel/autoconf.h>
#include <freeradius-devel/radiusd.h>
+#include <freeradius-devel/process.h>
#include <freeradius-devel/rad_assert.h>
#ifdef HAVE_SYS_STAT_H
if (conf->session_cache_enable) {
state->allow_session_resumption = 1; /* otherwise it's zero */
}
-
+
RDEBUG2("Initiate");
return state;
}
}
+static void dump_hex(const char *msg, const uint8_t *data, size_t data_len)
+{
+ size_t i;
+
+ if (debug_flag < 3) return;
+
+ printf("%s %d\n", msg, (int) data_len);
+ if (data_len > 256) data_len = 256;
+
+ for (i = 0; i < data_len; i++) {
+ if ((i & 0x0f) == 0x00) printf ("%02x: ", (unsigned int) i);
+ printf("%02x ", data[i]);
+ if ((i & 0x0f) == 0x0f) printf ("\n");
+ }
+ printf("\n");
+ fflush(stdout);
+}
+
+static void tls_socket_close(rad_listen_t *listener)
+{
+ listen_socket_t *sock = listener->data;
+
+ listener->status = RAD_LISTEN_STATUS_REMOVE_FD;
+ listener->tls = NULL; /* parent owns this! */
+
+ if (sock->parent) {
+ /*
+ * Decrement the number of connections.
+ */
+ if (sock->parent->num_connections > 0) {
+ sock->parent->num_connections--;
+ }
+ if (sock->client->num_connections > 0) {
+ sock->client->num_connections--;
+ }
+ }
+
+ /*
+ * Tell the event handler that an FD has disappeared.
+ */
+ DEBUG("Client has closed connection");
+ event_new_fd(listener);
+
+ /*
+ * Do NOT free the listener here. It's in use by
+ * a request, and will need to hang around until
+ * all of the requests are done.
+ *
+ * It is instead free'd in remove_from_request_hash()
+ */
+}
+
+static int tls_socket_write(rad_listen_t *listener, REQUEST *request)
+{
+ uint8_t *p;
+ ssize_t rcode;
+ listen_socket_t *sock = listener->data;
+
+ p = sock->ssn->dirty_out.data;
+
+ while (p < (sock->ssn->dirty_out.data + sock->ssn->dirty_out.used)) {
+ RDEBUG3("Writing to socket %d", request->packet->sockfd);
+ rcode = write(request->packet->sockfd, p,
+ (sock->ssn->dirty_out.data + sock->ssn->dirty_out.used) - p);
+ if (rcode <= 0) {
+ RDEBUG("Error writing to TLS socket: %s", strerror(errno));
+
+ tls_socket_close(listener);
+ return 0;
+ }
+ p += rcode;
+ }
+
+ sock->ssn->dirty_out.used = 0;
+
+ return 1;
+}
+
+
+static int tls_socket_recv(rad_listen_t *listener)
+{
+ int doing_init = FALSE;
+ ssize_t rcode;
+ RADIUS_PACKET *packet;
+ REQUEST *request;
+ listen_socket_t *sock = listener->data;
+ fr_tls_status_t status;
+ RADCLIENT *client = sock->client;
+
+ if (!sock->packet) {
+ sock->packet = rad_alloc(0);
+ if (!sock->packet) return 0;
+
+ sock->packet->sockfd = listener->fd;
+ sock->packet->src_ipaddr = sock->other_ipaddr;
+ sock->packet->src_port = sock->other_port;
+ sock->packet->dst_ipaddr = sock->my_ipaddr;
+ sock->packet->dst_port = sock->my_port;
+
+ if (sock->request) sock->request->packet = sock->packet;
+ }
+
+ /*
+ * Allocate a REQUEST for debugging.
+ */
+ if (!sock->request) {
+ sock->request = request = request_alloc();
+ if (!sock->request) {
+ radlog(L_ERR, "Out of memory");
+ return 0;
+ }
+
+ rad_assert(request->packet == NULL);
+ rad_assert(sock->packet != NULL);
+ request->packet = sock->packet;
+
+ request->component = "<core>";
+ request->component = "<tls-connect>";
+
+ /*
+ * Not sure if we should do this on every packet...
+ */
+ request->reply = rad_alloc(0);
+ if (!request->reply) return 0;
+
+ request->options = RAD_REQUEST_OPTION_DEBUG2;
+
+ rad_assert(sock->ssn == NULL);
+
+ sock->ssn = tls_new_session(listener->tls, sock->request,
+ listener->tls->require_client_cert);
+ if (!sock->ssn) {
+ request_free(&sock->request);
+ sock->packet = NULL;
+ return 0;
+ }
+
+ SSL_set_ex_data(sock->ssn->ssl, FR_TLS_EX_INDEX_REQUEST, (void *)request);
+ SSL_set_ex_data(sock->ssn->ssl, FR_TLS_EX_INDEX_CERTS, (void *)&request->packet->vps);
+
+ doing_init = TRUE;
+ }
+
+ rad_assert(sock->request != NULL);
+ rad_assert(sock->request->packet != NULL);
+ rad_assert(sock->packet != NULL);
+ rad_assert(sock->ssn != NULL);
+
+ request = sock->request;
+
+ RDEBUG3("Reading from socket %d", request->packet->sockfd);
+ PTHREAD_MUTEX_LOCK(&sock->mutex);
+ rcode = read(request->packet->sockfd,
+ sock->ssn->dirty_in.data,
+ sizeof(sock->ssn->dirty_in.data));
+ if ((rcode < 0) && (errno == ECONNRESET)) {
+ do_close:
+ PTHREAD_MUTEX_UNLOCK(&sock->mutex);
+ tls_socket_close(listener);
+ return 0;
+ }
+
+ if (rcode < 0) {
+ RDEBUG("Error reading TLS socket: %s", strerror(errno));
+ goto do_close;
+ }
+
+ /*
+ * Normal socket close.
+ */
+ if (rcode == 0) goto do_close;
+
+ sock->ssn->dirty_in.used = rcode;
+ memset(sock->ssn->dirty_in.data + sock->ssn->dirty_in.used,
+ 0, 16);
+
+ dump_hex("READ FROM SSL", sock->ssn->dirty_in.data, sock->ssn->dirty_in.used);
+
+ /*
+ * Catch attempts to use non-SSL.
+ */
+ if (doing_init && (sock->ssn->dirty_in.data[0] != handshake)) {
+ RDEBUG("Non-TLS data sent to TLS socket: closing");
+ goto do_close;
+ }
+
+ /*
+ * Skip ahead to reading application data.
+ */
+ if (SSL_is_init_finished(sock->ssn->ssl)) goto app;
+
+ if (!tls_handshake_recv(request, sock->ssn)) {
+ RDEBUG("FAILED in TLS handshake receive");
+ goto do_close;
+ }
+
+ if (sock->ssn->dirty_out.used > 0) {
+ tls_socket_write(listener, request);
+ PTHREAD_MUTEX_UNLOCK(&sock->mutex);
+ return 0;
+ }
+
+app:
+ status = tls_application_data(sock->ssn, request);
+ RDEBUG("Application data status %d", status);
+
+ if (status == FR_TLS_MORE_FRAGMENTS) {
+ PTHREAD_MUTEX_UNLOCK(&sock->mutex);
+ return 0;
+ }
+
+ if (sock->ssn->clean_out.used == 0) {
+ PTHREAD_MUTEX_UNLOCK(&sock->mutex);
+ return 0;
+ }
+
+ dump_hex("TUNNELED DATA", sock->ssn->clean_out.data, sock->ssn->clean_out.used);
+
+ /*
+ * If the packet is a complete RADIUS packet, return it to
+ * the caller. Otherwise...
+ */
+ if ((sock->ssn->clean_out.used < 20) ||
+ (((sock->ssn->clean_out.data[2] << 8) | sock->ssn->clean_out.data[3]) != (int) sock->ssn->clean_out.used)) {
+ RDEBUG("Received bad packet: Length %d contents %d",
+ sock->ssn->clean_out.used,
+ (sock->ssn->clean_out.data[2] << 8) | sock->ssn->clean_out.data[3]);
+ goto do_close;
+ }
+
+ packet = sock->packet;
+ packet->data = rad_malloc(sock->ssn->clean_out.used);
+ packet->data_len = sock->ssn->clean_out.used;
+ memcpy(packet->data, sock->ssn->clean_out.data, packet->data_len);
+ packet->vps = NULL;
+ PTHREAD_MUTEX_UNLOCK(&sock->mutex);
+
+ if (!rad_packet_ok(packet, 0)) {
+ RDEBUG("Received bad packet: %s", fr_strerror());
+ tls_socket_close(listener);
+ return 0; /* do_close unlocks the mutex */
+ }
+
+ /*
+ * Copied from src/lib/radius.c, rad_recv();
+ */
+ if (fr_debug_flag) {
+ char host_ipaddr[128];
+
+ if ((packet->code > 0) && (packet->code < FR_MAX_PACKET_CODE)) {
+ RDEBUG("tls_recv: %s packet from host %s port %d, id=%d, length=%d",
+ fr_packet_codes[packet->code],
+ inet_ntop(packet->src_ipaddr.af,
+ &packet->src_ipaddr.ipaddr,
+ host_ipaddr, sizeof(host_ipaddr)),
+ packet->src_port,
+ packet->id, (int) packet->data_len);
+ } else {
+ RDEBUG("tls_recv: Packet from host %s port %d code=%d, id=%d, length=%d",
+ inet_ntop(packet->src_ipaddr.af,
+ &packet->src_ipaddr.ipaddr,
+ host_ipaddr, sizeof(host_ipaddr)),
+ packet->src_port,
+ packet->code,
+ packet->id, (int) packet->data_len);
+ }
+ }
+
+ FR_STATS_INC(auth, total_requests);
+
+ return 1;
+}
+
+
+int dual_tls_recv(rad_listen_t *listener)
+{
+ RADIUS_PACKET *packet;
+ REQUEST *request;
+ RAD_REQUEST_FUNP fun = NULL;
+ listen_socket_t *sock = listener->data;
+ RADCLIENT *client = sock->client;
+
+ if (!tls_socket_recv(listener)) {
+ return 0;
+ }
+
+ rad_assert(sock->request != NULL);
+ rad_assert(sock->request->packet != NULL);
+ rad_assert(sock->packet != NULL);
+ rad_assert(sock->ssn != NULL);
+
+ request = sock->request;
+ packet = sock->packet;
+
+ /*
+ * Some sanity checks, based on the packet code.
+ */
+ switch(packet->code) {
+ case PW_AUTHENTICATION_REQUEST:
+ if (listener->type != RAD_LISTEN_AUTH) goto bad_packet;
+ FR_STATS_INC(auth, total_requests);
+ fun = rad_authenticate;
+ break;
+
+ case PW_ACCOUNTING_REQUEST:
+ if (listener->type != RAD_LISTEN_ACCT) goto bad_packet;
+ FR_STATS_INC(acct, total_requests);
+ fun = rad_accounting;
+ break;
+
+ case PW_STATUS_SERVER:
+ if (!mainconfig.status_server) {
+ FR_STATS_INC(auth, total_unknown_types);
+ DEBUG("WARNING: Ignoring Status-Server request due to security configuration");
+ rad_free(&sock->packet);
+ request->packet = NULL;
+ return 0;
+ }
+ fun = rad_status_server;
+ break;
+
+ default:
+ bad_packet:
+ FR_STATS_INC(auth, total_unknown_types);
+
+ DEBUG("Invalid packet code %d sent from client %s port %d : IGNORED",
+ packet->code, client->shortname, packet->src_port);
+ rad_free(&sock->packet);
+ request->packet = NULL;
+ return 0;
+ } /* switch over packet types */
+
+ if (!request_receive(listener, packet, client, fun)) {
+ FR_STATS_INC(auth, total_packets_dropped);
+ rad_free(&sock->packet);
+ request->packet = NULL;
+ return 0;
+ }
+
+ sock->packet = NULL; /* we have no need for more partial reads */
+ request->packet = NULL;
+
+ return 1;
+}
+
+
+/*
+ * Send a response packet
+ */
+int dual_tls_send(rad_listen_t *listener, REQUEST *request)
+{
+ listen_socket_t *sock = listener->data;
+
+ rad_assert(request->listener == listener);
+ rad_assert(listener->send == dual_tls_send);
+
+ /*
+ * Accounting reject's are silently dropped.
+ *
+ * We do it here to avoid polluting the rest of the
+ * code with this knowledge
+ */
+ if (request->reply->code == 0) return 0;
+
+ /*
+ * Pack the VPs
+ */
+ if (rad_encode(request->reply, request->packet,
+ request->client->secret) < 0) {
+ RDEBUG("Failed encoding packet: %s", fr_strerror());
+ return 0;
+ }
+
+ /*
+ * Sign the packet.
+ */
+ if (rad_sign(request->reply, request->packet,
+ request->client->secret) < 0) {
+ RDEBUG("Failed signing packet: %s", fr_strerror());
+ return 0;
+ }
+
+ PTHREAD_MUTEX_LOCK(&sock->mutex);
+ /*
+ * Write the packet to the SSL buffers.
+ */
+ record_plus(&sock->ssn->clean_in,
+ request->reply->data, request->reply->data_len);
+
+ /*
+ * Do SSL magic to get encrypted data.
+ */
+ tls_handshake_send(request, sock->ssn);
+
+ /*
+ * And finally write the data to the socket.
+ */
+ if (sock->ssn->dirty_out.used > 0) {
+ dump_hex("WRITE TO SSL", sock->ssn->dirty_out.data, sock->ssn->dirty_out.used);
+
+ tls_socket_write(listener, request);
+ }
+ PTHREAD_MUTEX_UNLOCK(&sock->mutex);
+
+ return 0;
+}
+
+
+int proxy_tls_recv(rad_listen_t *listener)
+{
+ int rcode;
+ size_t length;
+ listen_socket_t *sock = listener->data;
+ char buffer[256];
+ uint8_t data[1024];
+ RADIUS_PACKET *packet;
+ RAD_REQUEST_FUNP fun = NULL;
+
+ DEBUG3("Proxy SSL socket has data to read");
+ PTHREAD_MUTEX_LOCK(&sock->mutex);
+redo:
+ rcode = SSL_read(sock->ssn->ssl, data, 4);
+ if (rcode <= 0) {
+ int err = SSL_get_error(sock->ssn->ssl, rcode);
+ switch (err) {
+ case SSL_ERROR_WANT_READ:
+ case SSL_ERROR_WANT_WRITE:
+ rcode = 0;
+ goto redo;
+ case SSL_ERROR_ZERO_RETURN:
+ /* remote end sent close_notify, send one back */
+ SSL_shutdown(sock->ssn->ssl);
+
+ case SSL_ERROR_SYSCALL:
+ do_close:
+ PTHREAD_MUTEX_UNLOCK(&sock->mutex);
+ tls_socket_close(listener);
+ return 0;
+
+ default:
+ while ((err = ERR_get_error())) {
+ DEBUG("proxy recv says %s",
+ ERR_error_string(err, NULL));
+ }
+
+ goto do_close;
+ }
+ }
+
+ length = (data[2] << 8) | data[3];
+ DEBUG3("Proxy received header saying we have a packet of %u bytes",
+ (unsigned int) length);
+
+ if (length > sizeof(data)) {
+ DEBUG("Received packet will be too large! (%u)",
+ (data[2] << 8) | data[3]);
+ goto do_close;
+ }
+
+ rcode = SSL_read(sock->ssn->ssl, data + 4, length);
+ if (rcode <= 0) {
+ switch (SSL_get_error(sock->ssn->ssl, rcode)) {
+ case SSL_ERROR_WANT_READ:
+ case SSL_ERROR_WANT_WRITE:
+ rcode = 0;
+ break;
+
+ case SSL_ERROR_ZERO_RETURN:
+ /* remote end sent close_notify, send one back */
+ SSL_shutdown(sock->ssn->ssl);
+ goto do_close;
+ default:
+ goto do_close;
+ }
+ }
+ PTHREAD_MUTEX_UNLOCK(&sock->mutex);
+
+ packet = rad_alloc(0);
+ packet->sockfd = listener->fd;
+ packet->src_ipaddr = sock->other_ipaddr;
+ packet->src_port = sock->other_port;
+ packet->dst_ipaddr = sock->my_ipaddr;
+ packet->dst_port = sock->my_port;
+ packet->code = data[0];
+ packet->id = data[1];
+ packet->data_len = length;
+ packet->data = rad_malloc(packet->data_len);
+ memcpy(packet->data, data, packet->data_len);
+ memcpy(packet->vector, packet->data + 4, 16);
+
+ /*
+ * FIXME: Client MIB updates?
+ */
+ switch(packet->code) {
+ case PW_AUTHENTICATION_ACK:
+ case PW_ACCESS_CHALLENGE:
+ case PW_AUTHENTICATION_REJECT:
+ fun = rad_authenticate;
+ break;
+
+#ifdef WITH_ACCOUNTING
+ case PW_ACCOUNTING_RESPONSE:
+ fun = rad_accounting;
+ break;
+#endif
+
+ default:
+ /*
+ * FIXME: Update MIB for packet types?
+ */
+ radlog(L_ERR, "Invalid packet code %d sent to a proxy port "
+ "from home server %s port %d - ID %d : IGNORED",
+ packet->code,
+ ip_ntoh(&packet->src_ipaddr, buffer, sizeof(buffer)),
+ packet->src_port, packet->id);
+ rad_free(&packet);
+ return 0;
+ }
+
+ if (!request_proxy_reply(packet)) {
+ rad_free(&packet);
+ return 0;
+ }
+
+ return 1;
+}
+
+int proxy_tls_send(rad_listen_t *listener, REQUEST *request)
+{
+ int rcode;
+ listen_socket_t *sock = listener->data;
+
+ /*
+ * Normal proxying calls us with the data already
+ * encoded. The "ping home server" code does not. So,
+ * if there's no packet, encode it here.
+ */
+ if (!request->proxy->data) {
+ request->proxy_listener->encode(request->proxy_listener,
+ request);
+ }
+
+ DEBUG3("Proxy is writing %u bytes to SSL",
+ (unsigned int) request->proxy->data_len);
+ PTHREAD_MUTEX_LOCK(&sock->mutex);
+ while ((rcode = SSL_write(sock->ssn->ssl, request->proxy->data,
+ request->proxy->data_len)) < 0) {
+ int err;
+ while ((err = ERR_get_error())) {
+ DEBUG("proxy SSL_write says %s",
+ ERR_error_string(err, NULL));
+ }
+ PTHREAD_MUTEX_UNLOCK(&sock->mutex);
+ tls_socket_close(listener);
+ return 0;
+ }
+ PTHREAD_MUTEX_UNLOCK(&sock->mutex);
+
+ return 1;
+}
+
#endif /* WITH_TLS */
projects / freeradius.git / commitdiff