merge of '182c2d8dbd5321ef4d1df8758936f4dc7127015f'

and '31dcd7a22983ef19d6c63248e415e71d292dd0ec'

--HG--
extra : convert_revision : e84f66826c7ee6ebe99ef92cc0f6c22ecf638d01

CHANGES

@@ -1,3 +1,22 @@
+0.49 - Tues 13 June 2003
+
+- Return immediately for "sleep 10 & echo foo", rather than waiting
+  for the sleep to return (pointed out by Rob Landley)
+
+- Added -P pidfile argument to the server (from Swen Schillig)
+
+- Compile fixes, make sure that all variable definitions are at the start
+  of a scope.
+
+- Use $HOME in preference to that from /etc/passwd, so that it
+  dbclient can still work on systems with a broken setup.
+
+- Add -N dbclient option for "no command"
+
+- Add -f dbclient option for "background after auth"
+
+- Try to finally fix ss_family compilation problems
+
 0.48.1 - Sat 11 March 2006
 
 - Compile fix for scp

Makefile.in

@@ -64,12 +64,12 @@ bindir=${exec_prefix}/bin
 sbindir=${exec_prefix}/sbin
 
 CC=@CC@
-LD=@LD@
 AR=@AR@
 RANLIB=@RANLIB@
 STRIP=@STRIP@
 INSTALL=@INSTALL@
-CFLAGS=-I. -I$(srcdir)/libtomcrypt/src/headers/ @CFLAGS@
+CPPFLAGS=@CPPFLAGS@
+CFLAGS=-I. -I$(srcdir) -I$(srcdir)/libtomcrypt/src/headers/ $(CPPFLAGS) @CFLAGS@
 LIBS=$(LTC) $(LTM) @LIBS@
 LDFLAGS=@LDFLAGS@
 
@@ -155,11 +155,11 @@ dropbearconvert: $(dropbearconvertobjs)
 
 dropbear dbclient dropbearkey dropbearconvert: $(HEADERS)  $(LTC) $(LTM) \
 													Makefile
-	$(LD) $(LDFLAGS) -o $@$(EXEEXT) $($@objs) $(LIBS)
+	$(CC) $(LDFLAGS) -o $@$(EXEEXT) $($@objs) $(LIBS)
 
 # scp doesn't use the libs so is special.
 scp: $(SCPOBJS)  $(HEADERS) Makefile
-	$(LD) $(LDFLAGS) -o $@$(EXEEXT) $(SCPOBJS)
+	$(CC) $(LDFLAGS) -o $@$(EXEEXT) $(SCPOBJS)
 
 
 # multi-binary compilation.
@@ -172,7 +172,7 @@ endif
 dropbearmulti: multilink 
 
 multibinary: $(HEADERS) $(MULTIOBJS) $(LTC) $(LTM) Makefile
-	$(LD) $(LDFLAGS) -o dropbearmulti$(EXEEXT) $(MULTIOBJS) $(LIBS)
+	$(CC) $(LDFLAGS) -o dropbearmulti$(EXEEXT) $(MULTIOBJS) $(LIBS)
 
 multilink: multibinary $(addprefix link, $(PROGRAMS))
 
@@ -186,6 +186,8 @@ $(LTC): options.h
 $(LTM): options.h
 	cd libtommath && $(MAKE)
 
+.PHONY : clean sizes thisclean distclean tidy ltc-clean ltm-clean
+
 ltc-clean:
 	cd libtomcrypt && $(MAKE) clean
 

auth.h

@@ -52,7 +52,7 @@ void cli_pubkeyfail();
 void cli_auth_password();
 int cli_auth_pubkey();
 void cli_auth_interactive();
-char* getpass_or_cancel();
+char* getpass_or_cancel(char* prompt);
 
 
 #define MAX_USERNAME_LEN 25 /* arbitrary for the moment */

cli-auth.c

@@ -281,11 +281,11 @@ void cli_auth_try() {
 
 /* A helper for getpass() that exits if the user cancels. The returned
  * password is statically allocated by getpass() */
-char* getpass_or_cancel()
+char* getpass_or_cancel(char* prompt)
 {
 	char* password = NULL;
 
-	password = getpass("Password: ");
+	password = getpass(prompt);
 
 	/* 0x03 is a ctrl-c character in the buffer. */
 	if (password == NULL || strchr(password, '\3') != NULL) {

cli-authinteract.c

@@ -99,13 +99,14 @@ void recv_msg_userauth_info_request() {
 	if (strlen(name) > 0) {
 		cleantext(name);
 		fprintf(stderr, "%s", name);
-		m_free(name);
 	}
+	m_free(name);
+
 	if (strlen(instruction) > 0) {
 		cleantext(instruction);
 		fprintf(stderr, "%s", instruction);
-		m_free(instruction);
 	}
+	m_free(instruction);
 
 	for (i = 0; i < num_prompts; i++) {
 		unsigned int response_len = 0;

cli-authpasswd.c

@@ -116,16 +116,19 @@ static char *gui_getpass(const char *prompt) {
 void cli_auth_password() {
 
 	char* password = NULL;
+	char prompt[80];
 
 	TRACE(("enter cli_auth_password"))
 	CHECKCLEARTOWRITE();
 
+	snprintf(prompt, sizeof(prompt), "%s@%s's password: ", 
+				cli_opts.username, cli_opts.remotehost);
 #ifdef ENABLE_CLI_ASKPASS_HELPER
 	if (want_askpass())
-		password = gui_getpass("Password: ");
+		password = gui_getpass(prompt);
 	else
 #endif
-		password = getpass_or_cancel("Password: ");
+		password = getpass_or_cancel(prompt);
 
 	buf_putbyte(ses.writepayload, SSH_MSG_USERAUTH_REQUEST);
 

cli-authpubkey.c

@@ -112,6 +112,7 @@ void recv_msg_userauth_pk_ok() {
 		/* Success */
 		break;
 	}
+	buf_free(keybuf);
 
 	if (keyitem != NULL) {
 		TRACE(("matching key"))

cli-kex.c

@@ -122,6 +122,7 @@ static void ask_to_confirm(unsigned char* keyblob, unsigned int keybloblen) {
 	fprintf(stderr, "\nHost '%s' is not in the trusted hosts file.\n(fingerprint %s)\nDo you want to continue connecting? (y/n)\n", 
 			cli_opts.remotehost, 
 			fp);
+	m_free(fp);
 
 	tty = fopen(_PATH_TTY, "r");
 	if (tty) {
@@ -132,7 +133,6 @@ static void ask_to_confirm(unsigned char* keyblob, unsigned int keybloblen) {
 	}
 
 	if (response == 'y') {
-		m_free(fp);
 		return;
 	}
 
@@ -145,34 +145,41 @@ static void checkhostkey(unsigned char* keyblob, unsigned int keybloblen) {
 	FILE *hostsfile = NULL;
 	int readonly = 0;
 	struct passwd *pw = NULL;
+	char * homedir = NULL;
 	unsigned int hostlen, algolen;
 	unsigned long len;
 	const char *algoname = NULL;
 	buffer * line = NULL;
 	int ret;
 	
-	pw = getpwuid(getuid());
+	homedir = getenv("HOME");
 
-	if (pw == NULL) {
+	if (!homedir) {
-		dropbear_exit("Failed to get homedir");
+		pw = getpwuid(getuid());
+		if (pw) {
+			homedir = pw->pw_dir;
+		}
+		pw = NULL;
 	}
 
-	len = strlen(pw->pw_dir);
+	if (homedir) {
+
+		len = strlen(homedir);
 		filename = m_malloc(len + 18); /* "/.ssh/known_hosts" and null-terminator*/
 
-	snprintf(filename, len+18, "%s/.ssh", pw->pw_dir);
+		snprintf(filename, len+18, "%s/.ssh", homedir);
 		/* Check that ~/.ssh exists - easiest way is just to mkdir */
 		if (mkdir(filename, S_IRWXU) != 0) {
 			if (errno != EEXIST) {
-			dropbear_log(LOG_INFO, "Warning: failed creating ~/.ssh: %s",
+				dropbear_log(LOG_INFO, "Warning: failed creating %s/.ssh: %s",
-					strerror(errno));
+						homedir, strerror(errno));
 				TRACE(("mkdir didn't work: %s", strerror(errno)))
 				ask_to_confirm(keyblob, keybloblen);
 				goto out; /* only get here on success */
 			}
 		}
 
-	snprintf(filename, len+18, "%s/.ssh/known_hosts", pw->pw_dir);
+		snprintf(filename, len+18, "%s/.ssh/known_hosts", homedir);
 		hostsfile = fopen(filename, "a+");
 		
 		if (hostsfile != NULL) {
@@ -185,9 +192,12 @@ static void checkhostkey(unsigned char* keyblob, unsigned int keybloblen) {
 					hostsfile = fopen(filename, "r");
 			}
 		}
+	}
 
 	if (hostsfile == NULL) {
 		TRACE(("hostsfile didn't open: %s", strerror(errno)))
+		dropbear_log(LOG_WARNING, "Failed to open %s/.ssh/known_hosts",
+				homedir);
 		ask_to_confirm(keyblob, keybloblen);
 		goto out; /* We only get here on success */
 	}

cli-runopts.c

@@ -44,12 +44,14 @@ static void addforward(char* str, struct TCPFwdList** fwdlist);
 static void printhelp() {
 
 	fprintf(stderr, "Dropbear client v%s\n"
-					"Usage: %s [options] [user@]host\n"
+					"Usage: %s [options] [user@]host [command]\n"
 					"Options are:\n"
 					"-p <remoteport>\n"
 					"-l <username>\n"
 					"-t    Allocate a pty\n"
 					"-T    Don't allocate a pty\n"
+					"-N    Don't run a remote command\n"
+					"-f    Run in background after auth\n"
 #ifdef ENABLE_CLI_PUBKEY_AUTH
 					"-i <identityfile>   (multiple allowed)\n"
 #endif
@@ -88,6 +90,8 @@ void cli_getopts(int argc, char ** argv) {
 	cli_opts.remoteport = NULL;
 	cli_opts.username = NULL;
 	cli_opts.cmd = NULL;
+	cli_opts.no_cmd = 0;
+	cli_opts.backgrounded = 0;
 	cli_opts.wantpty = 9; /* 9 means "it hasn't been touched", gets set later */
 #ifdef ENABLE_CLI_PUBKEY_AUTH
 	cli_opts.privkeys = NULL;
@@ -163,6 +167,12 @@ void cli_getopts(int argc, char ** argv) {
 				case 'T': /* don't want a pty */
 					cli_opts.wantpty = 0;
 					break;
+				case 'N':
+					cli_opts.no_cmd = 1;
+					break;
+				case 'f':
+					cli_opts.backgrounded = 1;
+					break;
 #ifdef ENABLE_CLI_LOCALTCPFWD
 				case 'L':
 					nextislocal = 1;
@@ -269,6 +279,11 @@ void cli_getopts(int argc, char ** argv) {
 			cli_opts.wantpty = 0;
 		}
 	}
+
+	if (cli_opts.backgrounded && cli_opts.cmd == NULL
+			&& cli_opts.no_cmd == 0) {
+		dropbear_exit("command required for -f");
+	}
 }
 
 #ifdef ENABLE_CLI_PUBKEY_AUTH

cli-service.c

@@ -82,6 +82,4 @@ void recv_msg_service_accept() {
 	}
 
 	dropbear_exit("unrecognised service accept");
-	/* m_free(servicename); not reached */
-
 }

cli-session.c

@@ -212,19 +212,38 @@ static void cli_sessionloop() {
 			*/
 
 		case USERAUTH_SUCCESS_RCVD:
+
+			if (cli_opts.backgrounded) {
+				int devnull;
+				// keeping stdin open steals input from the terminal and
+				// is confusing, though stdout/stderr could be useful.
+				devnull = open(_PATH_DEVNULL, O_RDONLY);
+				if (devnull < 0) {
+					dropbear_exit("opening /dev/null: %d %s",
+							errno, strerror(errno));
+				}
+				dup2(devnull, STDIN_FILENO);
+				if (daemon(0, 1) < 0) {
+					dropbear_exit("Backgrounding failed: %d %s", 
+							errno, strerror(errno));
+				}
+			}
+			
 #ifdef ENABLE_CLI_LOCALTCPFWD
 			setup_localtcp();
 #endif
 #ifdef ENABLE_CLI_REMOTETCPFWD
 			setup_remotetcp();
 #endif
+			if (!cli_opts.no_cmd) {
 				cli_send_chansess_request();
-			TRACE(("leave cli_sessionloop: cli_send_chansess_request"))
+			}
+			TRACE(("leave cli_sessionloop: running"))
 			cli_ses.state = SESSION_RUNNING;
 			return;
 
 		case SESSION_RUNNING:
-			if (ses.chancount < 1) {
+			if (ses.chancount < 1 && !cli_opts.no_cmd) {
 				cli_finished();
 			}
 

common-channel.c

@@ -181,6 +181,7 @@ void channelio(fd_set *readfds, fd_set *writefds) {
 
 	struct Channel *channel;
 	unsigned int i;
+	int ret;
 
 	/* iterate through all the possible channels */
 	for (i = 0; i < ses.chansize; i++) {
@@ -202,6 +203,25 @@ void channelio(fd_set *readfds, fd_set *writefds) {
 				send_msg_channel_data(channel, 1, SSH_EXTENDED_DATA_STDERR);
 		}
 
+		/* if we can read from the writefd, it might be closed, so we try to
+		 * see if it has errors */
+		if (IS_DROPBEAR_SERVER && channel->writefd >= 0 
+				&& channel->writefd != channel->readfd
+				&& FD_ISSET(channel->writefd, readfds)) {
+			if (channel->initconn) {
+				/* Handling for "in progress" connection - this is needed
+				 * to avoid spinning 100% CPU when we connect to a server
+				 * which doesn't send anything (tcpfwding) */
+				checkinitdone(channel);
+				continue; /* Important not to use the channel after 
+							 checkinitdone(), as it may be NULL */
+			}
+			ret = write(channel->writefd, NULL, 0); /* Fake write */
+			if (ret < 0 && errno != EINTR && errno != EAGAIN) {
+				closewritefd(channel);
+			}
+		}
+
 		/* write to program/pipe stdin */
 		if (channel->writefd >= 0 && FD_ISSET(channel->writefd, writefds)) {
 			if (channel->initconn) {
@@ -241,13 +261,13 @@ static void checkclose(struct Channel *channel) {
 				channel->writebuf,
 				channel->writebuf ? 0 : cbuf_getused(channel->extrabuf)))
 
-	if (!channel->sentclosed) {
+	/* server chansession channels are special, since readfd mightn't
-
+	 * close in the case of "sleep 4 & echo blah" until the sleep is up */
-		/* check for exited - currently only used for server sessions,
-		 * if the shell has exited etc */
 	if (channel->type->checkclose) {
 		if (channel->type->checkclose(channel)) {
 			closewritefd(channel);
+			closereadfd(channel, channel->readfd);
+			closereadfd(channel, channel->errfd);
 		}
 	}
 
@@ -257,12 +277,12 @@ static void checkclose(struct Channel *channel) {
 		send_msg_channel_eof(channel);
 	}
 
-		if (channel->writefd == FD_CLOSED
+	if (!channel->sentclosed
+		&& channel->writefd == FD_CLOSED
 		&& channel->readfd == FD_CLOSED
 		&& (channel->extrabuf != NULL || channel->errfd == FD_CLOSED)) {
 		send_msg_channel_close(channel);
 	}
-	}
 
 	/* When either party wishes to terminate the channel, it sends
 	 * SSH_MSG_CHANNEL_CLOSE.  Upon receiving this message, a party MUST
@@ -426,10 +446,22 @@ void setchannelfds(fd_set *readfds, fd_set *writefds) {
 			}
 		}
 
+		TRACE(("writefd = %d, readfd %d, errfd %d, bufused %d", 
+					channel->writefd, channel->readfd,
+					channel->errfd,
+					cbuf_getused(channel->writebuf) ))
+
+		/* For checking FD status (ie closure etc) - we don't actually
+		 * read data from writefd. We don't want to do this for the client,
+		 * since redirection to /dev/null will make it spin in the select */
+		if (IS_DROPBEAR_SERVER && channel->writefd >= 0 
+				&& channel->writefd != channel->readfd) {
+			FD_SET(channel->writefd, readfds);
+		}
+
 		/* Stuff from the wire */
 		if ((channel->writefd >= 0 && cbuf_getused(channel->writebuf) > 0 )
 				|| channel->initconn) {
-
 				FD_SET(channel->writefd, writefds);
 		}
 

common-kex.c

@@ -262,6 +262,7 @@ void gen_new_keys() {
 	hash_state hs;
 	unsigned int C2S_keysize, S2C_keysize;
 	char mactransletter, macrecvletter; /* Client or server specific */
+	int recv_cipher = 0, trans_cipher = 0;
 
 	TRACE(("enter gen_new_keys"))
 	/* the dh_K and hash are the start of all hashes, we make use of that */
@@ -298,17 +299,20 @@ void gen_new_keys() {
 	hashkeys(C2S_key, C2S_keysize, &hs, 'C');
 	hashkeys(S2C_key, S2C_keysize, &hs, 'D');
 
-	if (cbc_start(
+	recv_cipher = find_cipher(ses.newkeys->recv_algo_crypt->cipherdesc->name);
-		find_cipher(ses.newkeys->recv_algo_crypt->cipherdesc->name),
+	if (recv_cipher < 0)
-			recv_IV, recv_key, 
+	    dropbear_exit("crypto error");
+		
+	if (cbc_start(recv_cipher, recv_IV, recv_key, 
 			ses.newkeys->recv_algo_crypt->keysize, 0, 
 			&ses.newkeys->recv_symmetric_struct) != CRYPT_OK) {
 		dropbear_exit("crypto error");
 	}
+	trans_cipher = find_cipher(ses.newkeys->trans_algo_crypt->cipherdesc->name);
+	if (trans_cipher < 0)
+	    dropbear_exit("crypto error");
 		
-	if (cbc_start(
+	if (cbc_start(trans_cipher, trans_IV, trans_key, 
-		find_cipher(ses.newkeys->trans_algo_crypt->cipherdesc->name),
-			trans_IV, trans_key, 
 			ses.newkeys->trans_algo_crypt->keysize, 0, 
 			&ses.newkeys->trans_symmetric_struct) != CRYPT_OK) {
 		dropbear_exit("crypto error");
@@ -517,7 +521,7 @@ void kexdh_comb_key(mp_int *dh_pub_us, mp_int *dh_priv, mp_int *dh_pub_them,
 	hash_state hs;
 
 	/* read the prime and generator*/
-	mp_init(&dh_p);
+	m_mp_init(&dh_p);
 	bytes_to_mp(&dh_p, dh_p_val, DH_P_LEN);
 
 	/* Check that dh_pub_them (dh_e or dh_f) is in the range [1, p-1] */

common-session.c

@@ -229,7 +229,7 @@ void session_identification() {
 	/* write our version string, this blocks */
 	if (atomicio(write, ses.sock, LOCAL_IDENT "\r\n",
 				strlen(LOCAL_IDENT "\r\n")) == DROPBEAR_FAILURE) {
-		dropbear_exit("Error writing ident string");
+		ses.remoteclosed();
 	}
 
     /* If they send more than 50 lines, something is wrong */
@@ -250,7 +250,7 @@ void session_identification() {
 
 	if (!done) {
 		TRACE(("err: %s for '%s'\n", strerror(errno), linebuf))
-		dropbear_exit("Failed to get remote version");
+		ses.remoteclosed();
 	} else {
 		/* linebuf is already null terminated */
 		ses.remoteident = m_malloc(len);

configure.in

@@ -19,10 +19,13 @@ fi
 AC_SUBST(LD)	
 
 if test -z "$OLDCFLAGS" && test "$GCC" = "yes"; then
-	AC_MSG_RESULT(No \$CFLAGS set... using "-Os -W -Wall" for GCC)
+	AC_MSG_NOTICE(No \$CFLAGS set... using "-Os -W -Wall" for GCC)
 	CFLAGS="-Os -W -Wall"
 fi
 
+# large file support is useful for scp
+AC_SYS_LARGEFILE
+
 # Host specific options
 # this isn't a definitive list of hosts, they are just added as required
 AC_CANONICAL_HOST
@@ -75,7 +78,7 @@ dnl Can't use login() or logout() with uclibc
 AC_CHECK_DECL(__UCLIBC__, 
 	[
 	no_loginfunc_check=1
-	AC_MSG_RESULT(Using uClibc - login() and logout() probably don't work, so we won't use them.)
+	AC_MSG_NOTICE([Using uClibc - login() and logout() probably don't work, so we won't use them.])
 	],,,)
 
 # Checks for libraries.
@@ -104,16 +107,16 @@ AC_ARG_ENABLE(zlib,
 	[
 		if test "x$enableval" = "xno"; then
 			AC_DEFINE(DISABLE_ZLIB,, Use zlib)
-			AC_MSG_RESULT(Disabling zlib)
+			AC_MSG_NOTICE(Disabling zlib)
 		else
 			AC_CHECK_LIB(z, deflate, , AC_MSG_ERROR([*** zlib missing - install first or check config.log ***]))
-			AC_MSG_RESULT(Enabling zlib)
+			AC_MSG_NOTICE(Enabling zlib)
 		fi
 	],
 	[
 		# if not disabled, check for zlib
 		AC_CHECK_LIB(z, deflate, , AC_MSG_ERROR([*** zlib missing - install first or check config.log ***]))
-		AC_MSG_RESULT(Enabling zlib)
+		AC_MSG_NOTICE(Enabling zlib)
 	]
 )
 
@@ -141,16 +144,16 @@ AC_ARG_ENABLE(pam,
 	[
 		if test "x$enableval" = "xyes"; then
 			AC_CHECK_LIB(pam, pam_authenticate, , AC_MSG_ERROR([*** PAM missing - install first or check config.log ***]))
-			AC_MSG_RESULT(Enabling PAM)
+			AC_MSG_NOTICE(Enabling PAM)
 		else
 			AC_DEFINE(DISABLE_PAM,, Use PAM)
-			AC_MSG_RESULT(Disabling PAM)
+			AC_MSG_NOTICE(Disabling PAM)
 		fi
 	],
 	[
 		# disable it by default
 		AC_DEFINE(DISABLE_PAM,, Use PAM)
-		AC_MSG_RESULT(Disabling PAM)
+		AC_MSG_NOTICE(Disabling PAM)
 	]
 )
 
@@ -158,14 +161,14 @@ AC_ARG_ENABLE(openpty,
 	[  --disable-openpty       Don't use openpty, use alternative method],
 	[
 		if test "x$enableval" = "xno"; then
-			AC_MSG_RESULT(Not using openpty)
+			AC_MSG_NOTICE(Not using openpty)
 		else
-			AC_MSG_RESULT(Using openpty if available)
+			AC_MSG_NOTICE(Using openpty if available)
 			AC_SEARCH_LIBS(openpty, util, [AC_DEFINE(HAVE_OPENPTY,,Have openpty() function)])
 		fi
 	],
 	[
-		AC_MSG_RESULT(Using openpty if available)
+		AC_MSG_NOTICE(Using openpty if available)
 		AC_SEARCH_LIBS(openpty, util, [AC_DEFINE(HAVE_OPENPTY)])
 	]
 )
@@ -176,13 +179,13 @@ AC_ARG_ENABLE(syslog,
 	[
 		if test "x$enableval" = "xno"; then
 			AC_DEFINE(DISABLE_SYSLOG,, Using syslog)
-			AC_MSG_RESULT(Disabling syslog)
+			AC_MSG_NOTICE(Disabling syslog)
 		else
-			AC_MSG_RESULT(Enabling syslog)
+			AC_MSG_NOTICE(Enabling syslog)
 		fi
 	],
 	[
-		AC_MSG_RESULT(Enabling syslog)
+		AC_MSG_NOTICE(Enabling syslog)
 	]
 )
 
@@ -190,15 +193,15 @@ AC_ARG_ENABLE(shadow,
 	[  --disable-shadow        Don't use shadow passwords (if available)],
 	[
 		if test "x$enableval" = "xno"; then
-			AC_MSG_RESULT(Not using shadow passwords)
+			AC_MSG_NOTICE(Not using shadow passwords)
 		else
 			AC_CHECK_HEADERS([shadow.h])
-			AC_MSG_RESULT(Using shadow passwords if available)
+			AC_MSG_NOTICE(Using shadow passwords if available)
 		fi
 	],
 	[
 		AC_CHECK_HEADERS([shadow.h])
-		AC_MSG_RESULT(Using shadow passwords if available)
+		AC_MSG_NOTICE(Using shadow passwords if available)
 	]
 )
 			
@@ -339,7 +342,7 @@ AC_CHECK_MEMBERS([struct utmp.ut_host, struct utmp.ut_pid, struct utmp.ut_type,
 #endif
 ])
 
-AC_CHECK_MEMBERS([struct utmpx.ut_host, struct utmpx.ut_syslen, struct utmpx.ut_type, struct utmpx.ut_id, struct utmpx.ut_addr, struct utmpx.ut_addr_v6, struct utmpx.ut_time, struct utmpx.ut_tv, struct sockaddr_storage.ss_family, struct sockadd_storage.__family],,,[
+AC_CHECK_MEMBERS([struct utmpx.ut_host, struct utmpx.ut_syslen, struct utmpx.ut_type, struct utmpx.ut_id, struct utmpx.ut_addr, struct utmpx.ut_addr_v6, struct utmpx.ut_time, struct utmpx.ut_tv],,,[
 #include <sys/types.h>
 #include <sys/socket.h>
 #if HAVE_UTMPX_H
@@ -347,6 +350,11 @@ AC_CHECK_MEMBERS([struct utmpx.ut_host, struct utmpx.ut_syslen, struct utmpx.ut_
 #endif
 ])
 
+AC_CHECK_MEMBERS([struct sockaddr_storage.ss_family],,,[
+#include <sys/types.h>
+#include <sys/socket.h>
+])
+
 AC_CHECK_FUNCS(endutent getutent getutid getutline pututline setutent)
 AC_CHECK_FUNCS(utmpname)
 AC_CHECK_FUNCS(endutxent getutxent getutxid getutxline pututxline )
@@ -379,7 +387,7 @@ AC_ARG_ENABLE(wtmpx,
 AC_ARG_ENABLE(loginfunc,
 	[  --disable-loginfunc     Disable use of login() etc. [no]],
 	[ no_loginfunc_check=1
-	AC_MSG_RESULT(Not using login() etc) ]
+	AC_MSG_NOTICE(Not using login() etc) ]
 )
 AC_ARG_ENABLE(pututline,
 	[  --disable-pututline     Disable use of pututline() etc. ([uw]tmp) [no]],
@@ -596,7 +604,7 @@ if test -z "$no_ptmx_check" ; then
 	if test x"$cross_compiling" = x"no" ; then
 		AC_CHECK_FILE("/dev/ptmx", AC_DEFINE(USE_DEV_PTMX,,Use /dev/ptmx))
 	else
-		AC_MSG_RESULT(Not checking for /dev/ptmx, we're cross-compiling)
+		AC_MSG_NOTICE(Not checking for /dev/ptmx, we're cross-compiling)
 	fi
 fi
 
@@ -604,14 +612,57 @@ if test -z "$no_ptc_check" ; then
 	if test x"$cross_compiling" = x"no" ; then
 		AC_CHECK_FILE("/dev/ptc", AC_DEFINE(HAVE_DEV_PTS_AND_PTC,,Use /dev/ptc & /dev/pts))
 	else
-		AC_MSG_RESULT(Not checking for /dev/ptc & /dev/pts\, we're cross-compiling)
+		AC_MSG_NOTICE(Not checking for /dev/ptc & /dev/pts\, we're cross-compiling)
 	fi
 fi
 
 AC_EXEEXT
+
+# XXX there must be a nicer way to do this
+AS_MKDIR_P(libtomcrypt/src/ciphers/aes)
+AS_MKDIR_P(libtomcrypt/src/ciphers/safer)
+AS_MKDIR_P(libtomcrypt/src/ciphers/twofish)
+AS_MKDIR_P(libtomcrypt/src/encauth/ccm)
+AS_MKDIR_P(libtomcrypt/src/encauth/eax)
+AS_MKDIR_P(libtomcrypt/src/encauth/gcm)
+AS_MKDIR_P(libtomcrypt/src/encauth/ocb)
+AS_MKDIR_P(libtomcrypt/src/hashes)
+AS_MKDIR_P(libtomcrypt/src/hashes/chc)
+AS_MKDIR_P(libtomcrypt/src/hashes/helper)
+AS_MKDIR_P(libtomcrypt/src/hashes/sha2)
+AS_MKDIR_P(libtomcrypt/src/hashes/whirl)
+AS_MKDIR_P(libtomcrypt/src/mac/hmac)
+AS_MKDIR_P(libtomcrypt/src/mac/omac)
+AS_MKDIR_P(libtomcrypt/src/mac/pelican)
+AS_MKDIR_P(libtomcrypt/src/mac/pmac)
+AS_MKDIR_P(libtomcrypt/src/misc/base64)
+AS_MKDIR_P(libtomcrypt/src/misc/crypt)
+AS_MKDIR_P(libtomcrypt/src/misc/mpi)
+AS_MKDIR_P(libtomcrypt/src/misc/pkcs5)
+AS_MKDIR_P(libtomcrypt/src/modes/cbc)
+AS_MKDIR_P(libtomcrypt/src/modes/cfb)
+AS_MKDIR_P(libtomcrypt/src/modes/ctr)
+AS_MKDIR_P(libtomcrypt/src/modes/ecb)
+AS_MKDIR_P(libtomcrypt/src/modes/ofb)
+AS_MKDIR_P(libtomcrypt/src/pk/asn1/der/bit)
+AS_MKDIR_P(libtomcrypt/src/pk/asn1/der/choice)
+AS_MKDIR_P(libtomcrypt/src/pk/asn1/der/ia5)
+AS_MKDIR_P(libtomcrypt/src/pk/asn1/der/integer)
+AS_MKDIR_P(libtomcrypt/src/pk/asn1/der/object_identifier)
+AS_MKDIR_P(libtomcrypt/src/pk/asn1/der/octet)
+AS_MKDIR_P(libtomcrypt/src/pk/asn1/der/printable_string)
+AS_MKDIR_P(libtomcrypt/src/pk/asn1/der/sequence)
+AS_MKDIR_P(libtomcrypt/src/pk/asn1/der/short_integer)
+AS_MKDIR_P(libtomcrypt/src/pk/asn1/der/utctime)
+AS_MKDIR_P(libtomcrypt/src/pk/dh)
+AS_MKDIR_P(libtomcrypt/src/pk/dsa)
+AS_MKDIR_P(libtomcrypt/src/pk/ecc)
+AS_MKDIR_P(libtomcrypt/src/pk/pkcs1)
+AS_MKDIR_P(libtomcrypt/src/pk/rsa)
+AS_MKDIR_P(libtomcrypt/src/prng)
 AC_CONFIG_HEADER(config.h)
 AC_OUTPUT(Makefile)
 AC_OUTPUT(libtomcrypt/Makefile)
 AC_OUTPUT(libtommath/Makefile)
-AC_MSG_RESULT()
+AC_MSG_NOTICE()
-AC_MSG_RESULT(Now edit options.h to choose features.)
+AC_MSG_NOTICE(Now edit options.h to choose features.)

dbclient.1

@@ -29,24 +29,23 @@ Read the identity from file
 .I idfile
 (multiple allowed).
 .TP
-.B \-L \fIlocalport\fR:\fIremotehost\fR:\fIremoteport\fR
+.B \-L \fIlistenport\fR:\fIhost\fR:\fIport\fR
 Local port forwarding.
 Forward the port
-.I localport
+.I listenport
-on the local host to port
+on the local host through the SSH connection to port
-.I remoteport
+.I port
-on the remote host
+on the host
-.IR remotehost .
+.IR host .
 .TP
-.B \-R \fIlocalport\fR:\fIremotehost\fR:\fIremoteport\fR
+.B \-R \fIlistenport\fR:\fIhost\fR:\fIport\fR
 Remote port forwarding.
 Forward the port
-.I remoteport
+.I listenport
-on the remote host
+on the remote host through the SSH connection to port
-.I remotehost
+.I port
-to port
+on the host
-.I localport
+.IR host .
-on the local host.
 .TP
 .B \-l \fIuser
 Username.
@@ -60,6 +59,13 @@ Allocate a pty.
 .B \-T
 Don't allocate a pty.
 .TP
+.B \-N
+Don't request a remote shell or run any commands. Any command arguments are ignored.
+.TP
+.B \-f
+Fork into the background after authentication. A command argument (or -N) is required.
+This is useful when using password authentication.
+.TP
 .B \-g
 Allow non-local hosts to connect to forwarded ports. Applies to -L and -R
 forwarded ports, though remote connections to -R forwarded ports may be limited

dbutil.c

@@ -400,7 +400,10 @@ unsigned char * getaddrstring(struct sockaddr_storage* addr, int withport) {
 
 	len = sizeof(struct sockaddr_storage);
 	/* Some platforms such as Solaris 8 require that len is the length
-	 * of the specific structure. */
+	 * of the specific structure. Some older linux systems (glibc 2.1.3
+	 * such as debian potato) have sockaddr_storage.__ss_family instead
+	 * but we'll ignore them */
+#ifdef HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY
 	if (addr->ss_family == AF_INET) {
 		len = sizeof(struct sockaddr_in);
 	}
@@ -408,6 +411,7 @@ unsigned char * getaddrstring(struct sockaddr_storage* addr, int withport) {
 	if (addr->ss_family == AF_INET6) {
 		len = sizeof(struct sockaddr_in6);
 	}
+#endif
 #endif
 
 	ret = getnameinfo((struct sockaddr*)addr, len, hbuf, sizeof(hbuf), 
@@ -448,6 +452,7 @@ char* getaddrhostname(struct sockaddr_storage * addr) {
 	len = sizeof(struct sockaddr_storage);
 	/* Some platforms such as Solaris 8 require that len is the length
 	 * of the specific structure. */
+#ifdef HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY
 	if (addr->ss_family == AF_INET) {
 		len = sizeof(struct sockaddr_in);
 	}
@@ -456,6 +461,7 @@ char* getaddrhostname(struct sockaddr_storage * addr) {
 		len = sizeof(struct sockaddr_in6);
 	}
 #endif
+#endif
 
 
 	ret = getnameinfo((struct sockaddr*)addr, len, hbuf, sizeof(hbuf),
@@ -521,26 +527,36 @@ char * stripcontrol(const char * text) {
  * Returns DROPBEAR_SUCCESS or DROPBEAR_FAILURE */
 int buf_readfile(buffer* buf, const char* filename) {
 
-	int fd;
+	int fd = -1;
 	int len;
 	int maxlen;
+	int ret = DROPBEAR_FAILURE;
 
 	fd = open(filename, O_RDONLY);
 
 	if (fd < 0) {
-		close(fd);
+		goto out;
-		return DROPBEAR_FAILURE;
 	}
 	
 	do {
 		maxlen = buf->size - buf->pos;
-		len = read(fd, buf_getwriteptr(buf, maxlen),
+		len = read(fd, buf_getwriteptr(buf, maxlen), maxlen);
-				maxlen);
+		if (len < 0) {
+			if (errno == EINTR || errno == EAGAIN) {
+				continue;
+			}
+			goto out;
+		}
 		buf_incrwritepos(buf, len);
 	} while (len < maxlen && len > 0);
 
-	close(fd);
+	ret = DROPBEAR_SUCCESS;
-	return DROPBEAR_SUCCESS;
+
+out:
+	if (fd >= 0) {
+		m_close(fd);
+	}
+	return ret;
 }
 
 /* get a line from the file into buffer in the style expected for an

debian/changelog

@@ -1,14 +1,38 @@
-dropbear (0.48-0.1) unstable; urgency=high
+dropbear (0.49-0.1) unstable; urgency=low
 
   * New upstream release.
-  * SECURITY: Improve handling of denial of service attempts from a single IP.
 
- -- Matt Johnston <matt@ucc.asn.au>  Thu, 8 Mar 2006 19:20:21 +0800
+ -- Matt Johnston <matt@ucc.asn.au>  Tues, 13 June 2005 19:20:21 +0800
 
-dropbear (0.47-0.1) unstable; urgency=high
+dropbear (0.48.1-1) unstable; urgency=medium
+
+  * new upstream point release.
+    * Compile fix for scp
+  * debian/diff/dbclient.1.diff: new: document -R option to dbclient
+    accurately (thx Markus Schaber; closes: #351882).
+  * debian/dropbear.README.Debian: document a workaround for systems with
+    possibly blocking /dev/random device (closes: #355414)..
+
+ -- Gerrit Pape <pape@smarden.org>  Sun, 16 Apr 2006 16:16:40 +0000
+
+dropbear (0.48-1) unstable; urgency=medium
 
   * New upstream release.
-  * SECURITY: Fix incorrect buffer sizing.
+  * SECURITY: Improve handling of denial of service attempts from a single
+    IP.
+
+  * debian/implicit: update to revision 1.11.
+  * new upstream release updates to scp from OpenSSH 4.3p2 - fixes a
+    security issue where use of system() could cause users to execute
+    arbitrary code through malformed filenames; CVE-2006-0225 (see also
+    #349645); the scp binary is not provided by this package though.
+
+ -- Gerrit Pape <pape@smarden.org>  Fri, 10 Mar 2006 22:00:32 +0000
+
+dropbear (0.47-1) unstable; urgency=high
+
+  * New upstream release.
+  * SECURITY: Fix incorrect buffer sizing; CVE-2005-4178.
 
  -- Matt Johnston <matt@ucc.asn.au>  Thu, 8 Dec 2005 19:20:21 +0800
 

debian/dropbear.README.Debian

@@ -39,3 +39,14 @@ by following these steps:
 See the Dropbear homepage for more information:
   http://matt.ucc.asn.au/dropbear/dropbear.html
 
+
+Entropy from /dev/random
+------------------------
+
+The dropbear binary package is configured at compile time to read
+entropy from /dev/random. If /dev/random on a system blocks when
+reading data from it, client logins may be delayed until the client
+times out. The dropbear server writes a notice to the logs when it
+sees /dev/random blocking.  A workaround for such systems is to
+re-compile the package with DROPBEAR_RANDOM_DEV set to /dev/urandom
+in options.h.

debian/implicit

@@ -1,4 +1,4 @@
-# $Id: implicit,v 1.10 2004/07/03 15:20:00 pape Exp $
+# $Id: implicit,v 1.11 2005/11/29 21:57:55 pape Exp $
 
 .PHONY: deb-checkdir deb-checkuid
 
@@ -38,6 +38,14 @@ deb-checkuid:
 	@gzip -9 debian/$*/usr/share/doc/$*/changelog*
 %.deb-docs-docs:
 	@for i in `cat debian/$*.docs 2>/dev/null || :`; do \
+	  if test -d $$i; then \
+	    sh -cx "install -d -m0755 debian/$*/usr/share/doc/$*/$${i##*/}" && \
+	    for j in $$i/*; do \
+	      sh -cx "install -m0644 $$j \
+	        debian/$*/usr/share/doc/$*/$${i##*/}/" || exit 1; \
+	    done || exit 1; \
+	    continue; \
+	  fi; \
 	  sh -cx "install -m0644 $$i debian/$*/usr/share/doc/$*/" || exit 1; \
 	done
 	@test ! -r debian/$*.README.Debian || \

debug.h

@@ -44,8 +44,10 @@
 /* All functions writing to the cleartext payload buffer call
  * CHECKCLEARTOWRITE() before writing. This is only really useful if you're
  * attempting to track down a problem */
-#define CHECKCLEARTOWRITE() assert(ses.writepayload->len == 0 && \
+/*#define CHECKCLEARTOWRITE() assert(ses.writepayload->len == 0 && \
-		ses.writepayload->pos == 0)
+		ses.writepayload->pos == 0)*/
+
+#define CHECKCLEARTOWRITE()
 
 /* Define this, compile with -pg and set GMON_OUT_PREFIX=gmon to get gmon
  * output when Dropbear forks. This will allow it gprof to be used.

dropbear.8

@@ -72,6 +72,10 @@ Use this option to run
 under TCP/IP servers like inetd, tcpsvd, or tcpserver.
 In program mode the \-F option is implied, and \-p options are ignored.
 .TP
+.B \-P \fIpidfile
+Specify a pidfile to create when running as a daemon. If not specified, the 
+default is /var/run/dropbear.pid
+.TP
 .B \-a
 Allow remote hosts to connect to forwarded ports.
 .SH AUTHOR

dropbearkey.c

@@ -283,8 +283,10 @@ out:
 	buf_burn(buf);
 	buf_free(buf);
 	buf = NULL;
+	if (key) {
 		sign_key_free(key);
 		key = NULL;
+	}
 	exit(err);
 }
 
@@ -297,6 +299,9 @@ static void printpubkey(sign_key * key, int keytype) {
 	const char * typestring = NULL;
 	char *fp = NULL;
 	int len;
+	struct passwd * pw = NULL;
+	char * username = NULL;
+	char hostname[100];
 
 	buf = buf_new(MAX_PUBKEY_SIZE);
 	buf_put_pub_key(buf, key, keytype);
@@ -315,8 +320,18 @@ static void printpubkey(sign_key * key, int keytype) {
 
 	fp = sign_key_fingerprint(buf_getptr(buf, len), len);
 
-	printf("Public key portion is:\n%s %s\nFingerprint: %s\n",
+	/* a user@host comment is informative */
-			typestring, base64key, fp);
+	username = "";
+	pw = getpwuid(getuid());
+	if (pw) {
+		username = pw->pw_name;
+	}
+
+	gethostname(hostname, sizeof(hostname));
+	hostname[sizeof(hostname)-1] = '\0';
+
+	printf("Public key portion is:\n%s %s %s@%s\nFingerprint: %s\n",
+			typestring, base64key, username, hostname, fp);
 
 	m_free(fp);
 	buf_free(buf);

dss.c

@@ -341,7 +341,9 @@ void buf_put_dss_sign(buffer* buf, dss_key *key, const unsigned char* data,
 	/* generate k */
 	m_mp_init(&dss_protok);
 	bytes_to_mp(&dss_protok, proto_k, SHA512_HASH_SIZE);
-	mp_mod(&dss_protok, key->q, &dss_k);
+	if (mp_mod(&dss_protok, key->q, &dss_k) != MP_OKAY) {
+		dropbear_exit("dss error");
+	}
 	mp_clear(&dss_protok);
 	m_burn(proto_k, SHA512_HASH_SIZE);
 #else /* DSS_PROTOK not defined*/

includes.h

@@ -135,13 +135,6 @@ typedef u_int16_t uint16_t;
 #define LOG_AUTHPRIV LOG_AUTH
 #endif
 
-/* glibc 2.1.3 systems have sockaddr_storage.__ss_family rather than
- * sockaddr_storage.ss_family */
-#if !defined(HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY) \
-    && defined(HAVE_STRUCT_SOCKADDR_STORAGE___SS_FAMILY)
-#define ss_family __ss_family
-#endif
-
 /* so we can avoid warnings about unused params (ie in signal handlers etc) */
 #ifdef UNUSED 
 #elif defined(__GNUC__) 

keyimport.c

@@ -361,7 +361,7 @@ struct openssh_key {
 static struct openssh_key *load_openssh_key(const char *filename)
 {
 	struct openssh_key *ret;
-	FILE *fp;
+	FILE *fp = NULL;
 	char buffer[256];
 	char *errmsg = NULL, *p = NULL;
 	int headers_done;
@@ -482,6 +482,9 @@ static struct openssh_key *load_openssh_key(const char *filename)
 		memset(&ret, 0, sizeof(ret));
 		m_free(ret);
 	}
+	if (fp) {
+		fclose(fp);
+	}
 	if (errmsg) {
 		fprintf(stderr, "Error: %s\n", errmsg);
 	}
@@ -926,40 +929,6 @@ static int openssh_write(const char *filename, sign_key *key,
 	if (passphrase) {
 		fprintf(stderr, "Encrypted keys aren't supported currently\n");
 		goto error;
-#if 0
-		/*
-		 * Invent an iv. Then derive encryption key from passphrase
-		 * and iv/salt:
-		 * 
-		 *  - let block A equal MD5(passphrase || iv)
-		 *  - let block B equal MD5(A || passphrase || iv)
-		 *  - block C would be MD5(B || passphrase || iv) and so on
-		 *  - encryption key is the first N bytes of A || B
-		 */
-		struct MD5Context md5c;
-		unsigned char keybuf[32];
-
-		for (i = 0; i < 8; i++) iv[i] = random_byte();
-
-		MD5Init(&md5c);
-		MD5Update(&md5c, (unsigned char *)passphrase, strlen(passphrase));
-		MD5Update(&md5c, iv, 8);
-		MD5Final(keybuf, &md5c);
-
-		MD5Init(&md5c);
-		MD5Update(&md5c, keybuf, 16);
-		MD5Update(&md5c, (unsigned char *)passphrase, strlen(passphrase));
-		MD5Update(&md5c, iv, 8);
-		MD5Final(keybuf+16, &md5c);
-
-		/*
-		 * Now encrypt the key blob.
-		 */
-		des3_encrypt_pubkey_ossh(keybuf, iv, outblob, outlen);
-
-		memset(&md5c, 0, sizeof(md5c));
-		memset(keybuf, 0, sizeof(keybuf));
-#endif
 	}
 
 	/*
@@ -976,12 +945,6 @@ static int openssh_write(const char *filename, sign_key *key,
 		goto error;
 	}
 	fputs(header, fp);
-	if (passphrase) {
-		fprintf(fp, "Proc-Type: 4,ENCRYPTED\nDEK-Info: DES-EDE3-CBC,");
-		for (i = 0; i < 8; i++)
-			fprintf(fp, "%02X", iv[i]);
-		fprintf(fp, "\n\n");
-	}
 	base64_encode_fp(fp, outblob, outlen, 64);
 	fputs(footer, fp);
 	fclose(fp);

libtomcrypt/Makefile.in

@@ -158,7 +158,7 @@ default:library
 
 #ciphers come in two flavours... enc+dec and enc 
 src/ciphers/aes/aes_enc.o: src/ciphers/aes/aes.c src/ciphers/aes/aes_tab.c
-	$(CC) $(CFLAGS) -DENCRYPT_ONLY -c src/ciphers/aes/aes.c -o src/ciphers/aes/aes_enc.o
+	$(CC) $(CFLAGS) -DENCRYPT_ONLY -c $< -o src/ciphers/aes/aes_enc.o
 
 #These are the rules to make certain object files.
 src/ciphers/aes/aes.o: src/ciphers/aes/aes.c src/ciphers/aes/aes_tab.c

libtommath/bn_mp_div.c

@@ -269,7 +269,9 @@ int mp_div (mp_int * a, mp_int * b, mp_int * c, mp_int * d)
   }
 
   if (d != NULL) {
-    mp_div_2d (&x, norm, &x, NULL);
+    if ((res = mp_div_2d (&x, norm, &x, NULL)) != MP_OKAY) {
+		goto LBL_Y;
+	}
     mp_exch (&x, d);
   }
 

options.h

@@ -128,7 +128,7 @@ etc) slower (perhaps by 50%). Recommended for most small systems. */
  * You can't enable both PASSWORD and PAM. */
 
 #define ENABLE_SVR_PASSWORD_AUTH
-/* #define ENABLE_SVR_PAM_AUTH */ /* requires ./configure --enable-pam */
+/*#define ENABLE_SVR_PAM_AUTH */
 #define ENABLE_SVR_PUBKEY_AUTH
 
 #define ENABLE_CLI_PASSWORD_AUTH
@@ -199,15 +199,17 @@ etc) slower (perhaps by 50%). Recommended for most small systems. */
  * not using the Dropbear client, you'll need to change it */
 #define _PATH_SSH_PROGRAM "/usr/bin/dbclient"
 
-/* Multi-purpose binary configuration has now moved. Look at the top
+/* Whether to log commands executed by a client. This only logs the 
- * of the Makefile for instructions, or INSTALL */
+ * (single) command sent to the server, not what a user did in a 
+ * shell/sftp session etc. */
+/* #define LOG_COMMANDS */
 
 /*******************************************************************
  * You shouldn't edit below here unless you know you need to.
  *******************************************************************/
 
 #ifndef DROPBEAR_VERSION
-#define DROPBEAR_VERSION "0.48"
+#define DROPBEAR_VERSION "0.49"
 #endif
 
 #define LOCAL_IDENT "SSH-2.0-dropbear_" DROPBEAR_VERSION
@@ -250,6 +252,9 @@ etc) slower (perhaps by 50%). Recommended for most small systems. */
 #define DROPBEAR_MAX_PORTS 10 /* max number of ports which can be specified,
 								 ipv4 and ipv6 don't count twice */
 
+/* Each port might have at least a v4 and a v6 address */
+#define MAX_LISTEN_ADDR (DROPBEAR_MAX_PORTS*3)
+
 #define _PATH_TTY "/dev/tty"
 
 #define _PATH_CP "/bin/cp"
@@ -300,7 +305,6 @@ etc) slower (perhaps by 50%). Recommended for most small systems. */
 #define MAX_PROPOSED_ALGO 20
 
 /* size/count limits */
-#define MAX_LISTEN_ADDR 10
 
 #define MAX_PACKET_LEN 35000
 #define MIN_PACKET_LEN 16

rsa.c

@@ -300,18 +300,29 @@ void buf_put_rsa_sign(buffer* buf, rsa_key *key, const unsigned char* data,
 	/* rsa_tmp1 is em */
 	/* em' = em * r^e mod n */
 
-	mp_exptmod(&rsa_tmp2, key->e, key->n, &rsa_s); /* rsa_s used as a temp var*/
+	/* rsa_s used as a temp var*/
-	mp_invmod(&rsa_tmp2, key->n, &rsa_tmp3);
+	if (mp_exptmod(&rsa_tmp2, key->e, key->n, &rsa_s) != MP_OKAY) {
-	mp_mulmod(&rsa_tmp1, &rsa_s, key->n, &rsa_tmp2);
+		dropbear_exit("rsa error");
+	}
+	if (mp_invmod(&rsa_tmp2, key->n, &rsa_tmp3) != MP_OKAY) {
+		dropbear_exit("rsa error");
+	}
+	if (mp_mulmod(&rsa_tmp1, &rsa_s, key->n, &rsa_tmp2) != MP_OKAY) {
+		dropbear_exit("rsa error");
+	}
 
 	/* rsa_tmp2 is em' */
 	/* s' = (em')^d mod n */
-	mp_exptmod(&rsa_tmp2, key->d, key->n, &rsa_tmp1);
+	if (mp_exptmod(&rsa_tmp2, key->d, key->n, &rsa_tmp1) != MP_OKAY) {
+		dropbear_exit("rsa error");
+	}
 
 	/* rsa_tmp1 is s' */
 	/* rsa_tmp3 is r^(-1) mod n */
 	/* s = (s')r^(-1) mod n */
-	mp_mulmod(&rsa_tmp1, &rsa_tmp3, key->n, &rsa_s);
+	if (mp_mulmod(&rsa_tmp1, &rsa_tmp3, key->n, &rsa_s) != MP_OKAY) {
+		dropbear_exit("rsa error");
+	}
 
 #else
 

runopts.h

@@ -83,6 +83,7 @@ typedef struct svr_runopts {
 
 	sign_key *hostkey;
 	buffer * banner;
+	char * pidfile;
 
 } svr_runopts;
 
@@ -101,6 +102,8 @@ typedef struct cli_runopts {
 
 	char *cmd;
 	int wantpty;
+	int no_cmd;
+	int backgrounded;
 #ifdef ENABLE_CLI_PUBKEY_AUTH
 	struct SignKeyList *privkeys; /* Keys to use for public-key auth */
 #endif

svr-chansession.c

@@ -67,8 +67,7 @@ static void get_termmodes(struct ChanSess *chansess);
 extern char** environ;
 
 static int sesscheckclose(struct Channel *channel) {
-	struct ChanSess *chansess = (struct ChanSess*)channel->typedata;
+	return channel->writefd == -1;
-	return chansess->exit.exitpid >= 0;
 }
 
 /* Handler for childs exiting, store the state for return to the client */
@@ -89,6 +88,8 @@ static void sesssigchild_handler(int UNUSED(dummy)) {
 
 	TRACE(("enter sigchld handler"))
 	while ((pid = waitpid(-1, &status, WNOHANG)) > 0) {
+
+		exit = NULL;
 		/* find the corresponding chansess */
 		for (i = 0; i < svr_ses.childpidsize; i++) {
 			if (svr_ses.childpids[i].pid == pid) {
@@ -119,7 +120,6 @@ static void sesssigchild_handler(int UNUSED(dummy)) {
 			/* we use this to determine how pid exited */
 			exit->exitsignal = -1;
 		}
-		exit = NULL;
 	}
 
 	
@@ -410,7 +410,7 @@ static int sessionwinchange(struct ChanSess *chansess) {
 	
 	pty_change_window_size(chansess->master, termr, termc, termw, termh);
 
-	return DROPBEAR_FAILURE;
+	return DROPBEAR_SUCCESS;
 }
 
 static void get_termmodes(struct ChanSess *chansess) {
@@ -588,6 +588,16 @@ static int sessioncommand(struct Channel *channel, struct ChanSess *chansess,
 		}
 	}
 
+#ifdef LOG_COMMANDS
+	if (chansess->cmd) {
+		dropbear_log(LOG_INFO, "user %s executing '%s'", 
+						ses.authstate.printableuser, chansess->cmd);
+	} else {
+		dropbear_log(LOG_INFO, "user %s executing login shell", 
+						ses.authstate.printableuser);
+	}
+#endif
+
 	if (chansess->term == NULL) {
 		/* no pty */
 		ret = noptycommand(channel, chansess);

svr-kex.c

@@ -52,7 +52,9 @@ void recv_msg_kexdh_init() {
 	}
 
 	m_mp_init(&dh_e);
-	buf_getmpint(ses.payload, &dh_e);
+	if (buf_getmpint(ses.payload, &dh_e) != DROPBEAR_SUCCESS) {
+		dropbear_exit("Failed to get kex value");
+	}
 
 	send_msg_kexdh_reply(&dh_e);
 

svr-main.c

@@ -146,7 +146,7 @@ void main_noinetd() {
 	}
 
 	/* create a PID file so that we can be killed easily */
-	pidfile = fopen(DROPBEAR_PIDFILE, "w");
+	pidfile = fopen(svr_opts.pidfile, "w");
 	if (pidfile) {
 		fprintf(pidfile, "%d\n", getpid());
 		fclose(pidfile);
@@ -189,7 +189,7 @@ void main_noinetd() {
 		val = select(maxsock+1, &fds, NULL, NULL, &seltimeout);
 
 		if (exitflag) {
-			unlink(DROPBEAR_PIDFILE);
+			unlink(svr_opts.pidfile);
 			dropbear_exit("Terminated by signal");
 		}
 		

svr-runopts.c

@@ -72,6 +72,8 @@ static void printhelp(const char * progname) {
 #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
@@ -85,7 +87,7 @@ static void printhelp(const char * progname) {
 #ifdef DROPBEAR_RSA
 					RSA_PRIV_FILENAME,
 #endif
-					DROPBEAR_MAX_PORTS, DROPBEAR_DEFPORT);
+					DROPBEAR_MAX_PORTS, DROPBEAR_DEFPORT, DROPBEAR_PIDFILE);
 }
 
 void svr_getopts(int argc, char ** argv) {
@@ -105,6 +107,7 @@ void svr_getopts(int argc, char ** argv) {
 	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
@@ -185,6 +188,9 @@ void svr_getopts(int argc, char ** argv) {
 						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-tcpfwd.c

@@ -216,7 +216,7 @@ out:
 	if (ret == DROPBEAR_FAILURE) {
 		/* we only free it if a listener wasn't created, since the listener
 		 * has to remember it if it's to be cancelled */
-		m_free(tcpinfo->listenaddr);
+		m_free(bindaddr);
 		m_free(tcpinfo);
 	}
 	TRACE(("leave remotetcpreq"))