--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/svr-runopts.c	Thu Jan 11 04:29:08 2007 +0000
@@ -0,0 +1,321 @@
+/*
+ * Dropbear - a SSH2 server
+ * 
+ * Copyright (c) 2002,2003 Matt Johnston
+ * All rights reserved.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE. */
+
+#include "includes.h"
+#include "runopts.h"
+#include "signkey.h"
+#include "buffer.h"
+#include "dbutil.h"
+#include "algo.h"
+
+svr_runopts svr_opts; /* GLOBAL */
+
+static void printhelp(const char * progname);
+
+static void printhelp(const char * progname) {
+
+	fprintf(stderr, "Dropbear sshd v%s\n"
+					"Usage: %s [options]\n"
+					"Options are:\n"
+					"-b bannerfile	Display the contents of bannerfile"
+					" before user login\n"
+					"		(default: none)\n"
+#ifdef DROPBEAR_DSS
+					"-d dsskeyfile	Use dsskeyfile for the dss host key\n"
+					"		(default: %s)\n"
+#endif
+#ifdef DROPBEAR_RSA
+					"-r rsakeyfile	Use rsakeyfile for the rsa host key\n"
+					"		(default: %s)\n"
+#endif
+					"-F		Don't fork into background\n"
+#ifdef DISABLE_SYSLOG
+					"(Syslog support not compiled in, using stderr)\n"
+#else
+					"-E		Log to stderr rather than syslog\n"
+#endif
+#ifdef DO_MOTD
+					"-m		Don't display the motd on login\n"
+#endif
+					"-w		Disallow root logins\n"
+#if defined(ENABLE_SVR_PASSWORD_AUTH) || defined(ENABLE_SVR_PAM_AUTH)
+					"-s		Disable password logins\n"
+					"-g		Disable password logins for root\n"
+#endif
+#ifdef ENABLE_SVR_LOCALTCPFWD
+					"-j		Disable local port forwarding\n"
+#endif
+#ifdef ENABLE_SVR_REMOTETCPFWD
+					"-k		Disable remote port forwarding\n"
+					"-a		Allow connections to forwarded ports from any host\n"
+#endif
+					"-p port		Listen on specified tcp port, up to %d can be specified\n"
+					"		(default %s if none specified)\n"
+					"-P PidFile	Create pid file PidFile\n"
+					"		(default %s)\n"
+#ifdef INETD_MODE
+					"-i		Start for inetd\n"
+#endif
+#ifdef DEBUG_TRACE
+					"-v		verbose\n"
+#endif
+					,DROPBEAR_VERSION, progname,
+#ifdef DROPBEAR_DSS
+					DSS_PRIV_FILENAME,
+#endif
+#ifdef DROPBEAR_RSA
+					RSA_PRIV_FILENAME,
+#endif
+					DROPBEAR_MAX_PORTS, DROPBEAR_DEFPORT, DROPBEAR_PIDFILE);
+}
+
+void svr_getopts(int argc, char ** argv) {
+
+	unsigned int i;
+	char ** next = 0;
+
+	/* see printhelp() for options */
+	svr_opts.rsakeyfile = NULL;
+	svr_opts.dsskeyfile = NULL;
+	svr_opts.bannerfile = NULL;
+	svr_opts.banner = NULL;
+	svr_opts.forkbg = 1;
+	svr_opts.norootlogin = 0;
+	svr_opts.noauthpass = 0;
+	svr_opts.norootpass = 0;
+	svr_opts.inetdmode = 0;
+	svr_opts.portcount = 0;
+	svr_opts.hostkey = NULL;
+	svr_opts.pidfile = DROPBEAR_PIDFILE;
+#ifdef ENABLE_SVR_LOCALTCPFWD
+	svr_opts.nolocaltcp = 0;
+#endif
+#ifdef ENABLE_SVR_REMOTETCPFWD
+	svr_opts.noremotetcp = 0;
+#endif
+	/* not yet
+	opts.ipv4 = 1;
+	opts.ipv6 = 1;
+	*/
+#ifdef DO_MOTD
+	svr_opts.domotd = 1;
+#endif
+#ifndef DISABLE_SYSLOG
+	svr_opts.usingsyslog = 1;
+#endif
+#ifdef ENABLE_SVR_REMOTETCPFWD
+	opts.listen_fwd_all = 0;
+#endif
+
+	for (i = 1; i < (unsigned int)argc; i++) {
+		if (next) {
+			*next = argv[i];
+			if (*next == NULL) {
+				dropbear_exit("Invalid null argument");
+			}
+			next = 0x00;
+			continue;
+		}
+
+		if (argv[i][0] == '-') {
+			switch (argv[i][1]) {
+				case 'b':
+					next = &svr_opts.bannerfile;
+					break;
+#ifdef DROPBEAR_DSS
+				case 'd':
+					next = &svr_opts.dsskeyfile;
+					break;
+#endif
+#ifdef DROPBEAR_RSA
+				case 'r':
+					next = &svr_opts.rsakeyfile;
+					break;
+#endif
+				case 'F':
+					svr_opts.forkbg = 0;
+					break;
+#ifndef DISABLE_SYSLOG
+				case 'E':
+					svr_opts.usingsyslog = 0;
+					break;
+#endif
+#ifdef ENABLE_SVR_LOCALTCPFWD
+				case 'j':
+					svr_opts.nolocaltcp = 1;
+					break;
+#endif
+#ifdef ENABLE_SVR_REMOTETCPFWD
+				case 'k':
+					svr_opts.noremotetcp = 1;
+					break;
+				case 'a':
+					opts.listen_fwd_all = 1;
+					break;
+#endif
+#ifdef INETD_MODE
+				case 'i':
+					svr_opts.inetdmode = 1;
+					break;
+#endif
+				case 'p':
+					if (svr_opts.portcount < DROPBEAR_MAX_PORTS) {
+						svr_opts.ports[svr_opts.portcount] = NULL;
+						next = &svr_opts.ports[svr_opts.portcount];
+						/* Note: if it doesn't actually get set, we'll
+						 * decrement it after the loop */
+						svr_opts.portcount++;
+					}
+					break;
+				case 'P':
+					next = &svr_opts.pidfile;
+					break;
+#ifdef DO_MOTD
+				/* motd is displayed by default, -m turns it off */
+				case 'm':
+					svr_opts.domotd = 0;
+					break;
+#endif
+				case 'w':
+					svr_opts.norootlogin = 1;
+					break;
+#if defined(ENABLE_SVR_PASSWORD_AUTH) || defined(ENABLE_SVR_PAM_AUTH)
+				case 's':
+					svr_opts.noauthpass = 1;
+					break;
+				case 'g':
+					svr_opts.norootpass = 1;
+					break;
+#endif
+				case 'h':
+					printhelp(argv[0]);
+					exit(EXIT_FAILURE);
+					break;
+#ifdef DEBUG_TRACE
+				case 'v':
+					debug_trace = 1;
+					break;
+#endif
+				default:
+					fprintf(stderr, "Unknown argument %s\n", argv[i]);
+					printhelp(argv[0]);
+					exit(EXIT_FAILURE);
+					break;
+			}
+		}
+	}
+
+	/* Set up listening ports */
+	if (svr_opts.portcount == 0) {
+		svr_opts.ports[0] = m_strdup(DROPBEAR_DEFPORT);
+		svr_opts.portcount = 1;
+	} else {
+		/* we may have been given a -p option but no argument to go with
+		 * it */
+		if (svr_opts.ports[svr_opts.portcount-1] == NULL) {
+			svr_opts.portcount--;
+		}
+	}
+
+	if (svr_opts.dsskeyfile == NULL) {
+		svr_opts.dsskeyfile = DSS_PRIV_FILENAME;
+	}
+	if (svr_opts.rsakeyfile == NULL) {
+		svr_opts.rsakeyfile = RSA_PRIV_FILENAME;
+	}
+
+	if (svr_opts.bannerfile) {
+		struct stat buf;
+		if (stat(svr_opts.bannerfile, &buf) != 0) {
+			dropbear_exit("Error opening banner file '%s'",
+					svr_opts.bannerfile);
+		}
+		
+		if (buf.st_size > MAX_BANNER_SIZE) {
+			dropbear_exit("Banner file too large, max is %d bytes",
+					MAX_BANNER_SIZE);
+		}
+
+		svr_opts.banner = buf_new(buf.st_size);
+		if (buf_readfile(svr_opts.banner, svr_opts.bannerfile)!=DROPBEAR_SUCCESS) {
+			dropbear_exit("Error reading banner file '%s'",
+					svr_opts.bannerfile);
+		}
+		buf_setpos(svr_opts.banner, 0);
+	}
+
+}
+
+static void disablekey(int type, const char* filename) {
+
+	int i;
+
+	for (i = 0; sshhostkey[i].name != NULL; i++) {
+		if (sshhostkey[i].val == type) {
+			sshhostkey[i].usable = 0;
+			break;
+		}
+	}
+	dropbear_log(LOG_WARNING, "Failed reading '%s', disabling %s", filename,
+			type == DROPBEAR_SIGNKEY_DSS ? "DSS" : "RSA");
+}
+
+/* Must be called after syslog/etc is working */
+void loadhostkeys() {
+
+	int ret;
+	int type;
+
+	TRACE(("enter loadhostkeys"))
+
+	svr_opts.hostkey = new_sign_key();
+
+#ifdef DROPBEAR_RSA
+	type = DROPBEAR_SIGNKEY_RSA;
+	ret = readhostkey(svr_opts.rsakeyfile, svr_opts.hostkey, &type);
+	if (ret == DROPBEAR_FAILURE) {
+		disablekey(DROPBEAR_SIGNKEY_RSA, svr_opts.rsakeyfile);
+	}
+#endif
+#ifdef DROPBEAR_DSS
+	type = DROPBEAR_SIGNKEY_DSS;
+	ret = readhostkey(svr_opts.dsskeyfile, svr_opts.hostkey, &type);
+	if (ret == DROPBEAR_FAILURE) {
+		disablekey(DROPBEAR_SIGNKEY_DSS, svr_opts.dsskeyfile);
+	}
+#endif
+
+	if ( 1
+#ifdef DROPBEAR_DSS
+		&& svr_opts.hostkey->dsskey == NULL
+#endif
+#ifdef DROPBEAR_RSA
+		&& svr_opts.hostkey->rsakey == NULL
+#endif
+		) {
+		dropbear_exit("No hostkeys available");
+	}
+
+	TRACE(("leave loadhostkeys"))
+}