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-rw-r--r--crypto/kerberosIV/appl/ftp/ftpd/ftpd.c2076
1 files changed, 2076 insertions, 0 deletions
diff --git a/crypto/kerberosIV/appl/ftp/ftpd/ftpd.c b/crypto/kerberosIV/appl/ftp/ftpd/ftpd.c
new file mode 100644
index 0000000..17cd3b9
--- /dev/null
+++ b/crypto/kerberosIV/appl/ftp/ftpd/ftpd.c
@@ -0,0 +1,2076 @@
+/*
+ * Copyright (c) 1985, 1988, 1990, 1992, 1993, 1994
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the University of
+ * California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+RCSID("$Id: ftpd.c,v 1.88 1997/06/01 03:13:48 assar Exp $");
+#endif
+
+/*
+ * FTP server.
+ */
+#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#ifdef HAVE_SYS_PARAM_H
+#include <sys/param.h>
+#endif
+#ifdef HAVE_SYS_STAT_H
+#include <sys/stat.h>
+#endif
+#ifdef HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif
+#if defined(HAVE_SYS_IOCTL_H) && SunOS != 4
+#include <sys/ioctl.h>
+#endif
+#ifdef TIME_WITH_SYS_TIME
+#include <sys/time.h>
+#include <time.h>
+#elif defined(HAVE_SYS_TIME_H)
+#include <sys/time.h>
+#else
+#include <time.h>
+#endif
+#ifdef HAVE_SYS_RESOURCE_H
+#include <sys/resource.h>
+#endif
+#ifdef HAVE_SYS_WAIT_H
+#include <sys/wait.h>
+#endif
+
+#ifdef HAVE_NETINET_IN_H
+#include <netinet/in.h>
+#endif
+#ifdef HAVE_NETINET_IN_SYSTM_H
+#include <netinet/in_systm.h>
+#endif
+#ifdef HAVE_NETINET_IP_H
+#include <netinet/ip.h>
+#endif
+
+#ifdef HAVE_SYS_MMAN_H
+#include <sys/mman.h>
+#endif
+
+#define FTP_NAMES
+#include <arpa/ftp.h>
+#ifdef HAVE_ARPA_INET_H
+#include <arpa/inet.h>
+#endif
+#ifdef HAVE_ARPA_TELNET_H
+#include <arpa/telnet.h>
+#endif
+
+#include <ctype.h>
+#ifdef HAVE_DIRENT_H
+#include <dirent.h>
+#endif
+#include <errno.h>
+#ifdef HAVE_FCNTL_H
+#include <fcntl.h>
+#endif
+#include <glob.h>
+#include <limits.h>
+#ifdef HAVE_PWD_H
+#include <pwd.h>
+#endif
+#include <setjmp.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <string.h>
+#ifdef HAVE_SYSLOG_H
+#include <syslog.h>
+#endif
+#include <time.h>
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#ifdef HAVE_GRP_H
+#include <grp.h>
+#endif
+
+#include <err.h>
+
+#include "pathnames.h"
+#include "extern.h"
+#include "common.h"
+
+#include "auth.h"
+
+#include <krb.h>
+
+#include <kafs.h>
+#include "roken.h"
+
+#include <otp.h>
+
+#ifdef SOCKS
+#include <socks.h>
+extern int LIBPREFIX(fclose) __P((FILE *));
+#endif
+
+void yyparse();
+
+#ifndef LOG_FTP
+#define LOG_FTP LOG_DAEMON
+#endif
+
+static char version[] = "Version 6.00";
+
+extern off_t restart_point;
+extern char cbuf[];
+
+struct sockaddr_in ctrl_addr;
+struct sockaddr_in data_source;
+struct sockaddr_in data_dest;
+struct sockaddr_in his_addr;
+struct sockaddr_in pasv_addr;
+
+int data;
+jmp_buf errcatch, urgcatch;
+int oobflag;
+int logged_in;
+struct passwd *pw;
+int debug;
+int ftpd_timeout = 900; /* timeout after 15 minutes of inactivity */
+int maxtimeout = 7200;/* don't allow idle time to be set beyond 2 hours */
+int logging;
+int guest;
+int dochroot;
+int type;
+int form;
+int stru; /* avoid C keyword */
+int mode;
+int usedefault = 1; /* for data transfers */
+int pdata = -1; /* for passive mode */
+int transflag;
+off_t file_size;
+off_t byte_count;
+#if !defined(CMASK) || CMASK == 0
+#undef CMASK
+#define CMASK 027
+#endif
+int defumask = CMASK; /* default umask value */
+int guest_umask = 0777; /* Paranoia for anonymous users */
+char tmpline[10240];
+char hostname[MaxHostNameLen];
+char remotehost[MaxHostNameLen];
+static char ttyline[20];
+
+#define AUTH_PLAIN (1 << 0) /* allow sending passwords */
+#define AUTH_OTP (1 << 1) /* passwords are one-time */
+#define AUTH_FTP (1 << 2) /* allow anonymous login */
+
+static int auth_level = 0; /* Only allow kerberos login by default */
+
+/*
+ * Timeout intervals for retrying connections
+ * to hosts that don't accept PORT cmds. This
+ * is a kludge, but given the problems with TCP...
+ */
+#define SWAITMAX 90 /* wait at most 90 seconds */
+#define SWAITINT 5 /* interval between retries */
+
+int swaitmax = SWAITMAX;
+int swaitint = SWAITINT;
+
+#ifdef HAVE_SETPROCTITLE
+char proctitle[BUFSIZ]; /* initial part of title */
+#endif /* HAVE_SETPROCTITLE */
+
+#define LOGCMD(cmd, file) \
+ if (logging > 1) \
+ syslog(LOG_INFO,"%s %s%s", cmd, \
+ *(file) == '/' ? "" : curdir(), file);
+#define LOGCMD2(cmd, file1, file2) \
+ if (logging > 1) \
+ syslog(LOG_INFO,"%s %s%s %s%s", cmd, \
+ *(file1) == '/' ? "" : curdir(), file1, \
+ *(file2) == '/' ? "" : curdir(), file2);
+#define LOGBYTES(cmd, file, cnt) \
+ if (logging > 1) { \
+ if (cnt == (off_t)-1) \
+ syslog(LOG_INFO,"%s %s%s", cmd, \
+ *(file) == '/' ? "" : curdir(), file); \
+ else \
+ syslog(LOG_INFO, "%s %s%s = %ld bytes", \
+ cmd, (*(file) == '/') ? "" : curdir(), file, (long)cnt); \
+ }
+
+static void ack (char *);
+static void myoob (int);
+static int checkuser (char *, char *);
+static int checkaccess (char *);
+static FILE *dataconn (char *, off_t, char *);
+static void dolog (struct sockaddr_in *);
+static void end_login (void);
+static FILE *getdatasock (char *);
+static char *gunique (char *);
+static RETSIGTYPE lostconn (int);
+static int receive_data (FILE *, FILE *);
+static void send_data (FILE *, FILE *);
+static struct passwd * sgetpwnam (char *);
+static void usage(void);
+
+static char *
+curdir(void)
+{
+ static char path[MaxPathLen+1+1]; /* path + '/' + '\0' */
+
+ if (getcwd(path, sizeof(path)-2) == NULL)
+ return ("");
+ if (path[1] != '\0') /* special case for root dir. */
+ strcat(path, "/");
+ /* For guest account, skip / since it's chrooted */
+ return (guest ? path+1 : path);
+}
+
+#ifndef LINE_MAX
+#define LINE_MAX 1024
+#endif
+
+static int
+parse_auth_level(char *str)
+{
+ char *p;
+ int ret = 0;
+ char *foo = NULL;
+
+ for(p = strtok_r(str, ",", &foo);
+ p;
+ p = strtok_r(NULL, ",", &foo)) {
+ if(strcmp(p, "user") == 0)
+ ;
+ else if(strcmp(p, "otp") == 0)
+ ret |= AUTH_PLAIN|AUTH_OTP;
+ else if(strcmp(p, "ftp") == 0 ||
+ strcmp(p, "safe") == 0)
+ ret |= AUTH_FTP;
+ else if(strcmp(p, "plain") == 0)
+ ret |= AUTH_PLAIN;
+ else if(strcmp(p, "none") == 0)
+ ret |= AUTH_PLAIN|AUTH_FTP;
+ else
+ warnx("bad value for -a: `%s'", p);
+ }
+ return ret;
+}
+
+/*
+ * Print usage and die.
+ */
+
+static void
+usage (void)
+{
+ fprintf (stderr,
+ "Usage: %s [-d] [-i] [-g guest_umask] [-l] [-p port]"
+ " [-t timeout] [-T max_timeout] [-u umask] [-v]"
+ " [-a auth_level] \n",
+ __progname);
+ exit (1);
+}
+
+int
+main(int argc, char **argv)
+{
+ int addrlen, ch, on = 1, tos;
+ char *cp, line[LINE_MAX];
+ FILE *fd;
+ int not_inetd = 0;
+ int port;
+ struct servent *sp;
+ char tkfile[1024];
+
+ set_progname (argv[0]);
+
+ /* detach from any tickets and tokens */
+
+ snprintf(tkfile, sizeof(tkfile),
+ "/tmp/ftp_%u", (unsigned)getpid());
+ krb_set_tkt_string(tkfile);
+ if(k_hasafs())
+ k_setpag();
+
+ sp = getservbyname("ftp", "tcp");
+ if(sp)
+ port = sp->s_port;
+ else
+ port = htons(21);
+
+ while ((ch = getopt(argc, argv, "a:dg:ilp:t:T:u:v")) != EOF) {
+ switch (ch) {
+ case 'a':
+ auth_level = parse_auth_level(optarg);
+ break;
+ case 'd':
+ debug = 1;
+ break;
+
+ case 'i':
+ not_inetd = 1;
+ break;
+ case 'g':
+ {
+ long val = 0;
+
+ val = strtol(optarg, &optarg, 8);
+ if (*optarg != '\0' || val < 0)
+ warnx("bad value for -g");
+ else
+ guest_umask = val;
+ break;
+ }
+ case 'l':
+ logging++; /* > 1 == extra logging */
+ break;
+
+ case 'p':
+ sp = getservbyname(optarg, "tcp");
+ if(sp)
+ port = sp->s_port;
+ else
+ if(isdigit(optarg[0]))
+ port = htons(atoi(optarg));
+ else
+ warnx("bad value for -p");
+ break;
+
+ case 't':
+ ftpd_timeout = atoi(optarg);
+ if (maxtimeout < ftpd_timeout)
+ maxtimeout = ftpd_timeout;
+ break;
+
+ case 'T':
+ maxtimeout = atoi(optarg);
+ if (ftpd_timeout > maxtimeout)
+ ftpd_timeout = maxtimeout;
+ break;
+
+ case 'u':
+ {
+ long val = 0;
+
+ val = strtol(optarg, &optarg, 8);
+ if (*optarg != '\0' || val < 0)
+ warnx("bad value for -u");
+ else
+ defumask = val;
+ break;
+ }
+
+ case 'v':
+ debug = 1;
+ break;
+
+ default:
+ usage ();
+ }
+ }
+
+ if(not_inetd)
+ mini_inetd (port);
+
+ /*
+ * LOG_NDELAY sets up the logging connection immediately,
+ * necessary for anonymous ftp's that chroot and can't do it later.
+ */
+ openlog("ftpd", LOG_PID | LOG_NDELAY, LOG_FTP);
+ addrlen = sizeof(his_addr);
+ if (getpeername(0, (struct sockaddr *)&his_addr, &addrlen) < 0) {
+ syslog(LOG_ERR, "getpeername (%s): %m",argv[0]);
+ exit(1);
+ }
+ addrlen = sizeof(ctrl_addr);
+ if (getsockname(0, (struct sockaddr *)&ctrl_addr, &addrlen) < 0) {
+ syslog(LOG_ERR, "getsockname (%s): %m",argv[0]);
+ exit(1);
+ }
+#if defined(IP_TOS) && defined(HAVE_SETSOCKOPT)
+ tos = IPTOS_LOWDELAY;
+ if (setsockopt(0, IPPROTO_IP, IP_TOS, (void *)&tos, sizeof(int)) < 0)
+ syslog(LOG_WARNING, "setsockopt (IP_TOS): %m");
+#endif
+ data_source.sin_port = htons(ntohs(ctrl_addr.sin_port) - 1);
+ debug = 0;
+
+ /* set this here so it can be put in wtmp */
+ snprintf(ttyline, sizeof(ttyline), "ftp%u", (unsigned)getpid());
+
+
+ /* freopen(_PATH_DEVNULL, "w", stderr); */
+ signal(SIGPIPE, lostconn);
+ signal(SIGCHLD, SIG_IGN);
+#ifdef SIGURG
+ if (signal(SIGURG, myoob) == SIG_ERR)
+ syslog(LOG_ERR, "signal: %m");
+#endif
+
+ auth_init();
+
+ /* Try to handle urgent data inline */
+#if defined(SO_OOBINLINE) && defined(HAVE_SETSOCKOPT)
+ if (setsockopt(0, SOL_SOCKET, SO_OOBINLINE, (void *)&on,
+ sizeof(on)) < 0)
+ syslog(LOG_ERR, "setsockopt: %m");
+#endif
+
+#ifdef F_SETOWN
+ if (fcntl(fileno(stdin), F_SETOWN, getpid()) == -1)
+ syslog(LOG_ERR, "fcntl F_SETOWN: %m");
+#endif
+ dolog(&his_addr);
+ /*
+ * Set up default state
+ */
+ data = -1;
+ type = TYPE_A;
+ form = FORM_N;
+ stru = STRU_F;
+ mode = MODE_S;
+ tmpline[0] = '\0';
+
+ /* If logins are disabled, print out the message. */
+ if ((fd = fopen(_PATH_NOLOGIN,"r")) != NULL) {
+ while (fgets(line, sizeof(line), fd) != NULL) {
+ if ((cp = strchr(line, '\n')) != NULL)
+ *cp = '\0';
+ lreply(530, "%s", line);
+ }
+ fflush(stdout);
+ fclose(fd);
+ reply(530, "System not available.");
+ exit(0);
+ }
+ if ((fd = fopen(_PATH_FTPWELCOME, "r")) != NULL) {
+ while (fgets(line, sizeof(line), fd) != NULL) {
+ if ((cp = strchr(line, '\n')) != NULL)
+ *cp = '\0';
+ lreply(220, "%s", line);
+ }
+ fflush(stdout);
+ fclose(fd);
+ /* reply(220,) must follow */
+ }
+ k_gethostname(hostname, sizeof(hostname));
+ reply(220, "%s FTP server (%s+%s) ready.", hostname,
+ version, krb4_version);
+ setjmp(errcatch);
+ for (;;)
+ yyparse();
+ /* NOTREACHED */
+}
+
+static RETSIGTYPE
+lostconn(int signo)
+{
+
+ if (debug)
+ syslog(LOG_DEBUG, "lost connection");
+ dologout(-1);
+}
+
+/*
+ * Helper function for sgetpwnam().
+ */
+static char *
+sgetsave(char *s)
+{
+ char *new = strdup(s);
+
+ if (new == NULL) {
+ perror_reply(421, "Local resource failure: malloc");
+ dologout(1);
+ /* NOTREACHED */
+ }
+ return new;
+}
+
+/*
+ * Save the result of a getpwnam. Used for USER command, since
+ * the data returned must not be clobbered by any other command
+ * (e.g., globbing).
+ */
+static struct passwd *
+sgetpwnam(char *name)
+{
+ static struct passwd save;
+ struct passwd *p;
+
+ if ((p = k_getpwnam(name)) == NULL)
+ return (p);
+ if (save.pw_name) {
+ free(save.pw_name);
+ free(save.pw_passwd);
+ free(save.pw_gecos);
+ free(save.pw_dir);
+ free(save.pw_shell);
+ }
+ save = *p;
+ save.pw_name = sgetsave(p->pw_name);
+ save.pw_passwd = sgetsave(p->pw_passwd);
+ save.pw_gecos = sgetsave(p->pw_gecos);
+ save.pw_dir = sgetsave(p->pw_dir);
+ save.pw_shell = sgetsave(p->pw_shell);
+ return (&save);
+}
+
+static int login_attempts; /* number of failed login attempts */
+static int askpasswd; /* had user command, ask for passwd */
+static char curname[10]; /* current USER name */
+OtpContext otp_ctx;
+
+/*
+ * USER command.
+ * Sets global passwd pointer pw if named account exists and is acceptable;
+ * sets askpasswd if a PASS command is expected. If logged in previously,
+ * need to reset state. If name is "ftp" or "anonymous", the name is not in
+ * _PATH_FTPUSERS, and ftp account exists, set guest and pw, then just return.
+ * If account doesn't exist, ask for passwd anyway. Otherwise, check user
+ * requesting login privileges. Disallow anyone who does not have a standard
+ * shell as returned by getusershell(). Disallow anyone mentioned in the file
+ * _PATH_FTPUSERS to allow people such as root and uucp to be avoided.
+ */
+void
+user(char *name)
+{
+ char *cp, *shell;
+
+ if(auth_level == 0 && !auth_complete){
+ reply(530, "No login allowed without authorization.");
+ return;
+ }
+
+ if (logged_in) {
+ if (guest) {
+ reply(530, "Can't change user from guest login.");
+ return;
+ } else if (dochroot) {
+ reply(530, "Can't change user from chroot user.");
+ return;
+ }
+ end_login();
+ }
+
+ guest = 0;
+ if (strcmp(name, "ftp") == 0 || strcmp(name, "anonymous") == 0) {
+ if ((auth_level & AUTH_FTP) == 0 ||
+ checkaccess("ftp") ||
+ checkaccess("anonymous"))
+ reply(530, "User %s access denied.", name);
+ else if ((pw = sgetpwnam("ftp")) != NULL) {
+ guest = 1;
+ defumask = guest_umask; /* paranoia for incoming */
+ askpasswd = 1;
+ reply(331, "Guest login ok, type your name as password.");
+ } else
+ reply(530, "User %s unknown.", name);
+ if (!askpasswd && logging)
+ syslog(LOG_NOTICE,
+ "ANONYMOUS FTP LOGIN REFUSED FROM %s(%s)",
+ remotehost, inet_ntoa(his_addr.sin_addr));
+ return;
+ }
+ if((auth_level & AUTH_PLAIN) == 0 && !auth_complete){
+ reply(530, "Only authorized and anonymous login allowed.");
+ return;
+ }
+ if ((pw = sgetpwnam(name))) {
+ if ((shell = pw->pw_shell) == NULL || *shell == 0)
+ shell = _PATH_BSHELL;
+ while ((cp = getusershell()) != NULL)
+ if (strcmp(cp, shell) == 0)
+ break;
+ endusershell();
+
+ if (cp == NULL || checkaccess(name)) {
+ reply(530, "User %s access denied.", name);
+ if (logging)
+ syslog(LOG_NOTICE,
+ "FTP LOGIN REFUSED FROM %s(%s), %s",
+ remotehost,
+ inet_ntoa(his_addr.sin_addr),
+ name);
+ pw = (struct passwd *) NULL;
+ return;
+ }
+ }
+ if (logging)
+ strncpy(curname, name, sizeof(curname)-1);
+ if(auth_ok())
+ ct->userok(name);
+ else {
+ char ss[256];
+
+ if (otp_challenge(&otp_ctx, name, ss, sizeof(ss)) == 0) {
+ reply(331, "Password %s for %s required.",
+ ss, name);
+ askpasswd = 1;
+ } else if ((auth_level & AUTH_OTP) == 0) {
+ reply(331, "Password required for %s.", name);
+ askpasswd = 1;
+ } else {
+ char *s;
+
+ if (s = otp_error (&otp_ctx))
+ lreply(530, "OTP: %s", s);
+ reply(530,
+ "Only authorized, anonymous and OTP "
+ "login allowed.");
+ }
+
+ }
+ /*
+ * Delay before reading passwd after first failed
+ * attempt to slow down passwd-guessing programs.
+ */
+ if (login_attempts)
+ sleep(login_attempts);
+}
+
+/*
+ * Check if a user is in the file "fname"
+ */
+static int
+checkuser(char *fname, char *name)
+{
+ FILE *fd;
+ int found = 0;
+ char *p, line[BUFSIZ];
+
+ if ((fd = fopen(fname, "r")) != NULL) {
+ while (fgets(line, sizeof(line), fd) != NULL)
+ if ((p = strchr(line, '\n')) != NULL) {
+ *p = '\0';
+ if (line[0] == '#')
+ continue;
+ if (strcmp(line, name) == 0) {
+ found = 1;
+ break;
+ }
+ }
+ fclose(fd);
+ }
+ return (found);
+}
+
+
+/*
+ * Determine whether a user has access, based on information in
+ * _PATH_FTPUSERS. The users are listed one per line, with `allow'
+ * or `deny' after the username. If anything other than `allow', or
+ * just nothing, is given after the username, `deny' is assumed.
+ *
+ * If the user is not found in the file, but the pseudo-user `*' is,
+ * the permission is taken from that line.
+ *
+ * This preserves the old semantics where if a user was listed in the
+ * file he was denied, otherwise he was allowed.
+ *
+ * Return 1 if the user is denied, or 0 if he is allowed. */
+
+static int
+match(const char *pattern, const char *string)
+{
+#ifdef HAVE_FNMATCH
+ return fnmatch(pattern, string, FNM_NOESCAPE);
+#else
+ return strcmp(pattern, "*") != 0 && strcmp(pattern, string) != 0;
+#endif
+}
+
+static int
+checkaccess(char *name)
+{
+#define ALLOWED 0
+#define NOT_ALLOWED 1
+ FILE *fd;
+ int allowed = ALLOWED;
+ char *user, *perm, line[BUFSIZ];
+ char *foo;
+
+ fd = fopen(_PATH_FTPUSERS, "r");
+
+ if(fd == NULL)
+ return allowed;
+
+ while (fgets(line, sizeof(line), fd) != NULL) {
+ foo = NULL;
+ user = strtok_r(line, " \t\n", &foo);
+ if (user == NULL || user[0] == '#')
+ continue;
+ perm = strtok_r(NULL, " \t\n", &foo);
+ if (match(user, name) == 0){
+ if(perm && strcmp(perm, "allow") == 0)
+ allowed = ALLOWED;
+ else
+ allowed = NOT_ALLOWED;
+ break;
+ }
+ }
+ fclose(fd);
+ return allowed;
+}
+#undef ALLOWED
+#undef NOT_ALLOWED
+
+int do_login(int code, char *passwd)
+{
+ FILE *fd;
+ login_attempts = 0; /* this time successful */
+ if (setegid((gid_t)pw->pw_gid) < 0) {
+ reply(550, "Can't set gid.");
+ return -1;
+ }
+ initgroups(pw->pw_name, pw->pw_gid);
+
+ /* open wtmp before chroot */
+ logwtmp(ttyline, pw->pw_name, remotehost);
+ logged_in = 1;
+
+ dochroot = checkuser(_PATH_FTPCHROOT, pw->pw_name);
+ if (guest) {
+ /*
+ * We MUST do a chdir() after the chroot. Otherwise
+ * the old current directory will be accessible as "."
+ * outside the new root!
+ */
+ if (chroot(pw->pw_dir) < 0 || chdir("/") < 0) {
+ reply(550, "Can't set guest privileges.");
+ return -1;
+ }
+ } else if (dochroot) {
+ if (chroot(pw->pw_dir) < 0 || chdir("/") < 0) {
+ reply(550, "Can't change root.");
+ return -1;
+ }
+ } else if (chdir(pw->pw_dir) < 0) {
+ if (chdir("/") < 0) {
+ reply(530, "User %s: can't change directory to %s.",
+ pw->pw_name, pw->pw_dir);
+ return -1;
+ } else
+ lreply(code, "No directory! Logging in with home=/");
+ }
+ if (seteuid((uid_t)pw->pw_uid) < 0) {
+ reply(550, "Can't set uid.");
+ return -1;
+ }
+ /*
+ * Display a login message, if it exists.
+ * N.B. reply(code,) must follow the message.
+ */
+ if ((fd = fopen(_PATH_FTPLOGINMESG, "r")) != NULL) {
+ char *cp, line[LINE_MAX];
+
+ while (fgets(line, sizeof(line), fd) != NULL) {
+ if ((cp = strchr(line, '\n')) != NULL)
+ *cp = '\0';
+ lreply(code, "%s", line);
+ }
+ }
+ if (guest) {
+ reply(code, "Guest login ok, access restrictions apply.");
+#ifdef HAVE_SETPROCTITLE
+ snprintf (proctitle, sizeof(proctitle),
+ "%s: anonymous/%s",
+ remotehost,
+ passwd);
+#endif /* HAVE_SETPROCTITLE */
+ if (logging)
+ syslog(LOG_INFO, "ANONYMOUS FTP LOGIN FROM %s(%s), %s",
+ remotehost,
+ inet_ntoa(his_addr.sin_addr),
+ passwd);
+ } else {
+ reply(code, "User %s logged in.", pw->pw_name);
+#ifdef HAVE_SETPROCTITLE
+ snprintf(proctitle, sizeof(proctitle), "%s: %s", remotehost, pw->pw_name);
+ setproctitle(proctitle);
+#endif /* HAVE_SETPROCTITLE */
+ if (logging)
+ syslog(LOG_INFO, "FTP LOGIN FROM %s(%s) as %s",
+ remotehost,
+ inet_ntoa(his_addr.sin_addr),
+ pw->pw_name);
+ }
+ umask(defumask);
+ return 0;
+}
+
+/*
+ * Terminate login as previous user, if any, resetting state;
+ * used when USER command is given or login fails.
+ */
+static void
+end_login(void)
+{
+
+ seteuid((uid_t)0);
+ if (logged_in)
+ logwtmp(ttyline, "", "");
+ pw = NULL;
+ logged_in = 0;
+ guest = 0;
+ dochroot = 0;
+}
+
+void
+pass(char *passwd)
+{
+ int rval;
+
+ /* some clients insists on sending a password */
+ if (logged_in && askpasswd == 0){
+ reply(230, "Dumpucko!");
+ return;
+ }
+
+ if (logged_in || askpasswd == 0) {
+ reply(503, "Login with USER first.");
+ return;
+ }
+ askpasswd = 0;
+ rval = 1;
+ if (!guest) { /* "ftp" is only account allowed no password */
+ if (pw == NULL)
+ rval = 1; /* failure below */
+ else if (otp_verify_user (&otp_ctx, passwd) == 0) {
+ rval = 0;
+ } else if((auth_level & AUTH_OTP) == 0) {
+ char realm[REALM_SZ];
+ if((rval = krb_get_lrealm(realm, 1)) == KSUCCESS)
+ rval = krb_verify_user(pw->pw_name, "", realm,
+ passwd, 1, NULL);
+ if (rval == KSUCCESS ){
+ if(k_hasafs())
+ k_afsklog(0, 0);
+ }else
+ rval = unix_verify_user(pw->pw_name, passwd);
+ } else {
+ char *s;
+
+ if (s = otp_error(&otp_ctx))
+ lreply(530, "OTP: %s", s);
+ }
+ memset (passwd, 0, strlen(passwd));
+
+ /*
+ * If rval == 1, the user failed the authentication
+ * check above. If rval == 0, either Kerberos or
+ * local authentication succeeded.
+ */
+ if (rval) {
+ reply(530, "Login incorrect.");
+ if (logging)
+ syslog(LOG_NOTICE,
+ "FTP LOGIN FAILED FROM %s(%s), %s",
+ remotehost,
+ inet_ntoa(his_addr.sin_addr),
+ curname);
+ pw = NULL;
+ if (login_attempts++ >= 5) {
+ syslog(LOG_NOTICE,
+ "repeated login failures from %s(%s)",
+ remotehost,
+ inet_ntoa(his_addr.sin_addr));
+ exit(0);
+ }
+ return;
+ }
+ }
+ if(!do_login(230, passwd))
+ return;
+
+ /* Forget all about it... */
+ end_login();
+}
+
+void
+retrieve(char *cmd, char *name)
+{
+ FILE *fin = NULL, *dout;
+ struct stat st;
+ int (*closefunc) (FILE *);
+ char line[BUFSIZ];
+
+
+ if (cmd == 0) {
+ fin = fopen(name, "r");
+ closefunc = fclose;
+ st.st_size = 0;
+ if(fin == NULL){
+ struct cmds {
+ char *ext;
+ char *cmd;
+ } cmds[] = {
+ {".tar", "/bin/gtar cPf - %s"},
+ {".tar.gz", "/bin/gtar zcPf - %s"},
+ {".tar.Z", "/bin/gtar ZcPf - %s"},
+ {".gz", "/bin/gzip -c %s"},
+ {".Z", "/bin/compress -c %s"},
+ {NULL, NULL}
+ };
+ struct cmds *p;
+ for(p = cmds; p->ext; p++){
+ char *tail = name + strlen(name) - strlen(p->ext);
+ char c = *tail;
+
+ if(strcmp(tail, p->ext) == 0 &&
+ (*tail = 0) == 0 &&
+ access(name, R_OK) == 0){
+ snprintf (line, sizeof(line), p->cmd, name);
+ *tail = c;
+ break;
+ }
+ *tail = c;
+ }
+ if(p->ext){
+ fin = ftpd_popen(line, "r", 0, 0);
+ closefunc = ftpd_pclose;
+ st.st_size = -1;
+ cmd = line;
+ }
+ }
+ } else {
+ snprintf(line, sizeof(line), cmd, name);
+ name = line;
+ fin = ftpd_popen(line, "r", 1, 0);
+ closefunc = ftpd_pclose;
+ st.st_size = -1;
+ }
+ if (fin == NULL) {
+ if (errno != 0) {
+ perror_reply(550, name);
+ if (cmd == 0) {
+ LOGCMD("get", name);
+ }
+ }
+ return;
+ }
+ byte_count = -1;
+ if (cmd == 0){
+ if(fstat(fileno(fin), &st) < 0 || !S_ISREG(st.st_mode)) {
+ reply(550, "%s: not a plain file.", name);
+ goto done;
+ }
+ }
+ if (restart_point) {
+ if (type == TYPE_A) {
+ off_t i, n;
+ int c;
+
+ n = restart_point;
+ i = 0;
+ while (i++ < n) {
+ if ((c=getc(fin)) == EOF) {
+ perror_reply(550, name);
+ goto done;
+ }
+ if (c == '\n')
+ i++;
+ }
+ } else if (lseek(fileno(fin), restart_point, SEEK_SET) < 0) {
+ perror_reply(550, name);
+ goto done;
+ }
+ }
+ dout = dataconn(name, st.st_size, "w");
+ if (dout == NULL)
+ goto done;
+ set_buffer_size(fileno(dout), 0);
+ send_data(fin, dout);
+ fclose(dout);
+ data = -1;
+ pdata = -1;
+done:
+ if (cmd == 0)
+ LOGBYTES("get", name, byte_count);
+ (*closefunc)(fin);
+}
+
+/* filename sanity check */
+
+int
+filename_check(char *filename)
+{
+ static const char good_chars[] = "+-=_,.";
+ char *p;
+
+ p = strrchr(filename, '/');
+ if(p)
+ filename = p + 1;
+
+ p = filename;
+
+ if(isalnum(*p)){
+ p++;
+ while(*p && (isalnum(*p) || strchr(good_chars, *p)))
+ p++;
+ if(*p == '\0')
+ return 0;
+ }
+ lreply(553, "\"%s\" is an illegal filename.", filename);
+ lreply(553, "The filename must start with an alphanumeric "
+ "character and must only");
+ reply(553, "consist of alphanumeric characters or any of the following: %s",
+ good_chars);
+ return 1;
+}
+
+void
+do_store(char *name, char *mode, int unique)
+{
+ FILE *fout, *din;
+ struct stat st;
+ int (*closefunc) (FILE *);
+
+ if(guest && filename_check(name))
+ return;
+ if (unique && stat(name, &st) == 0 &&
+ (name = gunique(name)) == NULL) {
+ LOGCMD(*mode == 'w' ? "put" : "append", name);
+ return;
+ }
+
+ if (restart_point)
+ mode = "r+";
+ fout = fopen(name, mode);
+ closefunc = fclose;
+ if (fout == NULL) {
+ perror_reply(553, name);
+ LOGCMD(*mode == 'w' ? "put" : "append", name);
+ return;
+ }
+ byte_count = -1;
+ if (restart_point) {
+ if (type == TYPE_A) {
+ off_t i, n;
+ int c;
+
+ n = restart_point;
+ i = 0;
+ while (i++ < n) {
+ if ((c=getc(fout)) == EOF) {
+ perror_reply(550, name);
+ goto done;
+ }
+ if (c == '\n')
+ i++;
+ }
+ /*
+ * We must do this seek to "current" position
+ * because we are changing from reading to
+ * writing.
+ */
+ if (fseek(fout, 0L, SEEK_CUR) < 0) {
+ perror_reply(550, name);
+ goto done;
+ }
+ } else if (lseek(fileno(fout), restart_point, SEEK_SET) < 0) {
+ perror_reply(550, name);
+ goto done;
+ }
+ }
+ din = dataconn(name, (off_t)-1, "r");
+ if (din == NULL)
+ goto done;
+ set_buffer_size(fileno(din), 1);
+ if (receive_data(din, fout) == 0) {
+ if (unique)
+ reply(226, "Transfer complete (unique file name:%s).",
+ name);
+ else
+ reply(226, "Transfer complete.");
+ }
+ fclose(din);
+ data = -1;
+ pdata = -1;
+done:
+ LOGBYTES(*mode == 'w' ? "put" : "append", name, byte_count);
+ (*closefunc)(fout);
+}
+
+static FILE *
+getdatasock(char *mode)
+{
+ int on = 1, s, t, tries;
+
+ if (data >= 0)
+ return (fdopen(data, mode));
+ seteuid((uid_t)0);
+ s = socket(AF_INET, SOCK_STREAM, 0);
+ if (s < 0)
+ goto bad;
+#if defined(SO_REUSEADDR) && defined(HAVE_SETSOCKOPT)
+ if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR,
+ (void *) &on, sizeof(on)) < 0)
+ goto bad;
+#endif
+ /* anchor socket to avoid multi-homing problems */
+ data_source.sin_family = AF_INET;
+ data_source.sin_addr = ctrl_addr.sin_addr;
+ for (tries = 1; ; tries++) {
+ if (bind(s, (struct sockaddr *)&data_source,
+ sizeof(data_source)) >= 0)
+ break;
+ if (errno != EADDRINUSE || tries > 10)
+ goto bad;
+ sleep(tries);
+ }
+ seteuid((uid_t)pw->pw_uid);
+#if defined(IP_TOS) && defined(HAVE_SETSOCKOPT)
+ on = IPTOS_THROUGHPUT;
+ if (setsockopt(s, IPPROTO_IP, IP_TOS, (void *)&on, sizeof(int)) < 0)
+ syslog(LOG_WARNING, "setsockopt (IP_TOS): %m");
+#endif
+ return (fdopen(s, mode));
+bad:
+ /* Return the real value of errno (close may change it) */
+ t = errno;
+ seteuid((uid_t)pw->pw_uid);
+ close(s);
+ errno = t;
+ return (NULL);
+}
+
+static FILE *
+dataconn(char *name, off_t size, char *mode)
+{
+ char sizebuf[32];
+ FILE *file;
+ int retry = 0, tos;
+
+ file_size = size;
+ byte_count = 0;
+ if (size != (off_t) -1)
+ snprintf(sizebuf, sizeof(sizebuf), " (%ld bytes)", size);
+ else
+ strcpy(sizebuf, "");
+ if (pdata >= 0) {
+ struct sockaddr_in from;
+ int s, fromlen = sizeof(from);
+
+ s = accept(pdata, (struct sockaddr *)&from, &fromlen);
+ if (s < 0) {
+ reply(425, "Can't open data connection.");
+ close(pdata);
+ pdata = -1;
+ return (NULL);
+ }
+ close(pdata);
+ pdata = s;
+#if defined(IP_TOS) && defined(HAVE_SETSOCKOPT)
+ tos = IPTOS_THROUGHPUT;
+ setsockopt(s, IPPROTO_IP, IP_TOS, (void *)&tos,
+ sizeof(int));
+#endif
+ reply(150, "Opening %s mode data connection for '%s'%s.",
+ type == TYPE_A ? "ASCII" : "BINARY", name, sizebuf);
+ return (fdopen(pdata, mode));
+ }
+ if (data >= 0) {
+ reply(125, "Using existing data connection for '%s'%s.",
+ name, sizebuf);
+ usedefault = 1;
+ return (fdopen(data, mode));
+ }
+ if (usedefault)
+ data_dest = his_addr;
+ usedefault = 1;
+ file = getdatasock(mode);
+ if (file == NULL) {
+ reply(425, "Can't create data socket (%s,%d): %s.",
+ inet_ntoa(data_source.sin_addr),
+ ntohs(data_source.sin_port), strerror(errno));
+ return (NULL);
+ }
+ data = fileno(file);
+ while (connect(data, (struct sockaddr *)&data_dest,
+ sizeof(data_dest)) < 0) {
+ if (errno == EADDRINUSE && retry < swaitmax) {
+ sleep((unsigned) swaitint);
+ retry += swaitint;
+ continue;
+ }
+ perror_reply(425, "Can't build data connection");
+ fclose(file);
+ data = -1;
+ return (NULL);
+ }
+ reply(150, "Opening %s mode data connection for '%s'%s.",
+ type == TYPE_A ? "ASCII" : "BINARY", name, sizebuf);
+ return (file);
+}
+
+/*
+ * Tranfer the contents of "instr" to "outstr" peer using the appropriate
+ * encapsulation of the data subject * to Mode, Structure, and Type.
+ *
+ * NB: Form isn't handled.
+ */
+static void
+send_data(FILE *instr, FILE *outstr)
+{
+ int c, cnt, filefd, netfd;
+ static char *buf;
+ static size_t bufsize;
+ int i = 0;
+ char s[1024];
+
+ transflag++;
+ if (setjmp(urgcatch)) {
+ transflag = 0;
+ return;
+ }
+ switch (type) {
+
+ case TYPE_A:
+ while ((c = getc(instr)) != EOF) {
+ byte_count++;
+ if(i > 1022){
+ auth_write(fileno(outstr), s, i);
+ i = 0;
+ }
+ if(c == '\n')
+ s[i++] = '\r';
+ s[i++] = c;
+ }
+ if(i)
+ auth_write(fileno(outstr), s, i);
+ auth_write(fileno(outstr), s, 0);
+ fflush(outstr);
+ transflag = 0;
+ if (ferror(instr))
+ goto file_err;
+ if (ferror(outstr))
+ goto data_err;
+ reply(226, "Transfer complete.");
+ return;
+
+ case TYPE_I:
+ case TYPE_L:
+#ifdef HAVE_MMAP
+#ifndef MAP_FAILED
+#define MAP_FAILED (-1)
+#endif
+ {
+ struct stat st;
+ char *chunk;
+ int in = fileno(instr);
+ if(fstat(in, &st) == 0 && S_ISREG(st.st_mode)) {
+ chunk = mmap(0, st.st_size, PROT_READ, MAP_SHARED, in, 0);
+ if(chunk != (void *)MAP_FAILED) {
+ cnt = st.st_size - restart_point;
+ auth_write(fileno(outstr),
+ chunk + restart_point,
+ cnt);
+ munmap(chunk, st.st_size);
+ auth_write(fileno(outstr), NULL, 0);
+ byte_count = cnt;
+ transflag = 0;
+ }
+ }
+ }
+
+#endif
+ if(transflag){
+ struct stat st;
+
+ netfd = fileno(outstr);
+ filefd = fileno(instr);
+ buf = alloc_buffer (buf, &bufsize,
+ fstat(filefd, &st) >= 0 ? &st : NULL);
+ if (buf == NULL) {
+ transflag = 0;
+ perror_reply(451, "Local resource failure: malloc");
+ return;
+ }
+ while ((cnt = read(filefd, buf, bufsize)) > 0 &&
+ auth_write(netfd, buf, cnt) == cnt)
+ byte_count += cnt;
+ auth_write(netfd, buf, 0); /* to end an encrypted stream */
+ transflag = 0;
+ if (cnt != 0) {
+ if (cnt < 0)
+ goto file_err;
+ goto data_err;
+ }
+ }
+ reply(226, "Transfer complete.");
+ return;
+ default:
+ transflag = 0;
+ reply(550, "Unimplemented TYPE %d in send_data", type);
+ return;
+ }
+
+data_err:
+ transflag = 0;
+ perror_reply(426, "Data connection");
+ return;
+
+file_err:
+ transflag = 0;
+ perror_reply(551, "Error on input file");
+}
+
+/*
+ * Transfer data from peer to "outstr" using the appropriate encapulation of
+ * the data subject to Mode, Structure, and Type.
+ *
+ * N.B.: Form isn't handled.
+ */
+static int
+receive_data(FILE *instr, FILE *outstr)
+{
+ int cnt, bare_lfs = 0;
+ static char *buf;
+ static size_t bufsize;
+ struct stat st;
+
+ transflag++;
+ if (setjmp(urgcatch)) {
+ transflag = 0;
+ return (-1);
+ }
+
+ buf = alloc_buffer (buf, &bufsize,
+ fstat(fileno(outstr), &st) >= 0 ? &st : NULL);
+ if (buf == NULL) {
+ transflag = 0;
+ perror_reply(451, "Local resource failure: malloc");
+ return -1;
+ }
+
+ switch (type) {
+
+ case TYPE_I:
+ case TYPE_L:
+ while ((cnt = auth_read(fileno(instr), buf, bufsize)) > 0) {
+ if (write(fileno(outstr), buf, cnt) != cnt)
+ goto file_err;
+ byte_count += cnt;
+ }
+ if (cnt < 0)
+ goto data_err;
+ transflag = 0;
+ return (0);
+
+ case TYPE_E:
+ reply(553, "TYPE E not implemented.");
+ transflag = 0;
+ return (-1);
+
+ case TYPE_A:
+ {
+ char *p, *q;
+ int cr_flag = 0;
+ while ((cnt = auth_read(fileno(instr),
+ buf + cr_flag,
+ bufsize - cr_flag)) > 0){
+ byte_count += cnt;
+ cnt += cr_flag;
+ cr_flag = 0;
+ for(p = buf, q = buf; p < buf + cnt;) {
+ if(*p == '\n')
+ bare_lfs++;
+ if(*p == '\r')
+ if(p == buf + cnt - 1){
+ cr_flag = 1;
+ p++;
+ continue;
+ }else if(p[1] == '\n'){
+ *q++ = '\n';
+ p += 2;
+ continue;
+ }
+ *q++ = *p++;
+ }
+ fwrite(buf, q - buf, 1, outstr);
+ if(cr_flag)
+ buf[0] = '\r';
+ }
+ if(cr_flag)
+ putc('\r', outstr);
+ fflush(outstr);
+ if (ferror(instr))
+ goto data_err;
+ if (ferror(outstr))
+ goto file_err;
+ transflag = 0;
+ if (bare_lfs) {
+ lreply(226, "WARNING! %d bare linefeeds received in ASCII mode\r\n"
+ " File may not have transferred correctly.\r\n",
+ bare_lfs);
+ }
+ return (0);
+ }
+ default:
+ reply(550, "Unimplemented TYPE %d in receive_data", type);
+ transflag = 0;
+ return (-1);
+ }
+
+data_err:
+ transflag = 0;
+ perror_reply(426, "Data Connection");
+ return (-1);
+
+file_err:
+ transflag = 0;
+ perror_reply(452, "Error writing file");
+ return (-1);
+}
+
+void
+statfilecmd(char *filename)
+{
+ FILE *fin;
+ int c;
+ char line[LINE_MAX];
+
+ snprintf(line, sizeof(line), "/bin/ls -la %s", filename);
+ fin = ftpd_popen(line, "r", 1, 0);
+ lreply(211, "status of %s:", filename);
+ while ((c = getc(fin)) != EOF) {
+ if (c == '\n') {
+ if (ferror(stdout)){
+ perror_reply(421, "control connection");
+ ftpd_pclose(fin);
+ dologout(1);
+ /* NOTREACHED */
+ }
+ if (ferror(fin)) {
+ perror_reply(551, filename);
+ ftpd_pclose(fin);
+ return;
+ }
+ putc('\r', stdout);
+ }
+ putc(c, stdout);
+ }
+ ftpd_pclose(fin);
+ reply(211, "End of Status");
+}
+
+void
+statcmd(void)
+{
+#if 0
+ struct sockaddr_in *sin;
+ u_char *a, *p;
+
+ lreply(211, "%s FTP server status:", hostname, version);
+ printf(" %s\r\n", version);
+ printf(" Connected to %s", remotehost);
+ if (!isdigit(remotehost[0]))
+ printf(" (%s)", inet_ntoa(his_addr.sin_addr));
+ printf("\r\n");
+ if (logged_in) {
+ if (guest)
+ printf(" Logged in anonymously\r\n");
+ else
+ printf(" Logged in as %s\r\n", pw->pw_name);
+ } else if (askpasswd)
+ printf(" Waiting for password\r\n");
+ else
+ printf(" Waiting for user name\r\n");
+ printf(" TYPE: %s", typenames[type]);
+ if (type == TYPE_A || type == TYPE_E)
+ printf(", FORM: %s", formnames[form]);
+ if (type == TYPE_L)
+#if NBBY == 8
+ printf(" %d", NBBY);
+#else
+ printf(" %d", bytesize); /* need definition! */
+#endif
+ printf("; STRUcture: %s; transfer MODE: %s\r\n",
+ strunames[stru], modenames[mode]);
+ if (data != -1)
+ printf(" Data connection open\r\n");
+ else if (pdata != -1) {
+ printf(" in Passive mode");
+ sin = &pasv_addr;
+ goto printaddr;
+ } else if (usedefault == 0) {
+ printf(" PORT");
+ sin = &data_dest;
+printaddr:
+ a = (u_char *) &sin->sin_addr;
+ p = (u_char *) &sin->sin_port;
+#define UC(b) (((int) b) & 0xff)
+ printf(" (%d,%d,%d,%d,%d,%d)\r\n", UC(a[0]),
+ UC(a[1]), UC(a[2]), UC(a[3]), UC(p[0]), UC(p[1]));
+#undef UC
+ } else
+ printf(" No data connection\r\n");
+#endif
+ reply(211, "End of status");
+}
+
+void
+fatal(char *s)
+{
+
+ reply(451, "Error in server: %s\n", s);
+ reply(221, "Closing connection due to server error.");
+ dologout(0);
+ /* NOTREACHED */
+}
+
+static void
+int_reply(int, char *, const char *, va_list)
+#ifdef __GNUC__
+__attribute__ ((format (printf, 3, 0)))
+#endif
+;
+
+static void
+int_reply(int n, char *c, const char *fmt, va_list ap)
+{
+ char buf[10240];
+ char *p;
+ p=buf;
+ if(n){
+ snprintf(p, sizeof(buf), "%d%s", n, c);
+ p+=strlen(p);
+ }
+ vsnprintf(p, sizeof(buf) - strlen(p), fmt, ap);
+ p+=strlen(p);
+ snprintf(p, sizeof(buf) - strlen(p), "\r\n");
+ p+=strlen(p);
+ auth_printf("%s", buf);
+ fflush(stdout);
+ if (debug)
+ syslog(LOG_DEBUG, "<--- %s- ", buf);
+}
+
+void
+reply(int n, const char *fmt, ...)
+{
+ va_list ap;
+ va_start(ap, fmt);
+ int_reply(n, " ", fmt, ap);
+ delete_ftp_command();
+ va_end(ap);
+}
+
+void
+lreply(int n, const char *fmt, ...)
+{
+ va_list ap;
+ va_start(ap, fmt);
+ int_reply(n, "-", fmt, ap);
+ va_end(ap);
+}
+
+void
+nreply(const char *fmt, ...)
+{
+ va_list ap;
+ va_start(ap, fmt);
+ int_reply(0, NULL, fmt, ap);
+ va_end(ap);
+}
+
+static void
+ack(char *s)
+{
+
+ reply(250, "%s command successful.", s);
+}
+
+void
+nack(char *s)
+{
+
+ reply(502, "%s command not implemented.", s);
+}
+
+/* ARGSUSED */
+void
+yyerror(char *s)
+{
+ char *cp;
+
+ if ((cp = strchr(cbuf,'\n')))
+ *cp = '\0';
+ reply(500, "'%s': command not understood.", cbuf);
+}
+
+void
+do_delete(char *name)
+{
+ struct stat st;
+
+ LOGCMD("delete", name);
+ if (stat(name, &st) < 0) {
+ perror_reply(550, name);
+ return;
+ }
+ if ((st.st_mode&S_IFMT) == S_IFDIR) {
+ if (rmdir(name) < 0) {
+ perror_reply(550, name);
+ return;
+ }
+ goto done;
+ }
+ if (unlink(name) < 0) {
+ perror_reply(550, name);
+ return;
+ }
+done:
+ ack("DELE");
+}
+
+void
+cwd(char *path)
+{
+
+ if (chdir(path) < 0)
+ perror_reply(550, path);
+ else
+ ack("CWD");
+}
+
+void
+makedir(char *name)
+{
+
+ LOGCMD("mkdir", name);
+ if(guest && filename_check(name))
+ return;
+ if (mkdir(name, 0777) < 0)
+ perror_reply(550, name);
+ else{
+ if(guest)
+ chmod(name, 0700); /* guest has umask 777 */
+ reply(257, "MKD command successful.");
+ }
+}
+
+void
+removedir(char *name)
+{
+
+ LOGCMD("rmdir", name);
+ if (rmdir(name) < 0)
+ perror_reply(550, name);
+ else
+ ack("RMD");
+}
+
+void
+pwd(void)
+{
+ char path[MaxPathLen + 1];
+ char *ret;
+
+ /* SunOS has a broken getcwd that does popen(pwd) (!!!), this
+ * failes miserably when running chroot
+ */
+ ret = getcwd(path, sizeof(path));
+ if (ret == NULL)
+ reply(550, "%s.", strerror(errno));
+ else
+ reply(257, "\"%s\" is current directory.", path);
+}
+
+char *
+renamefrom(char *name)
+{
+ struct stat st;
+
+ if (stat(name, &st) < 0) {
+ perror_reply(550, name);
+ return NULL;
+ }
+ reply(350, "File exists, ready for destination name");
+ return (name);
+}
+
+void
+renamecmd(char *from, char *to)
+{
+
+ LOGCMD2("rename", from, to);
+ if(guest && filename_check(to))
+ return;
+ if (rename(from, to) < 0)
+ perror_reply(550, "rename");
+ else
+ ack("RNTO");
+}
+
+static void
+dolog(struct sockaddr_in *sin)
+{
+ inaddr2str (sin->sin_addr, remotehost, sizeof(remotehost));
+#ifdef HAVE_SETPROCTITLE
+ snprintf(proctitle, sizeof(proctitle), "%s: connected", remotehost);
+ setproctitle(proctitle);
+#endif /* HAVE_SETPROCTITLE */
+
+ if (logging)
+ syslog(LOG_INFO, "connection from %s(%s)",
+ remotehost,
+ inet_ntoa(his_addr.sin_addr));
+}
+
+/*
+ * Record logout in wtmp file
+ * and exit with supplied status.
+ */
+void
+dologout(int status)
+{
+ transflag = 0;
+ if (logged_in) {
+ seteuid((uid_t)0);
+ logwtmp(ttyline, "", "");
+ dest_tkt();
+ if(k_hasafs())
+ k_unlog();
+ }
+ /* beware of flushing buffers after a SIGPIPE */
+#ifdef XXX
+ exit(status);
+#else
+ _exit(status);
+#endif
+}
+
+void abor(void)
+{
+}
+
+static void
+myoob(int signo)
+{
+#if 0
+ char *cp;
+#endif
+
+ /* only process if transfer occurring */
+ if (!transflag)
+ return;
+
+ /* This is all XXX */
+ oobflag = 1;
+ /* if the command resulted in a new command,
+ parse that as well */
+ do{
+ yyparse();
+ } while(ftp_command);
+ oobflag = 0;
+
+#if 0
+ cp = tmpline;
+ if (getline(cp, 7) == NULL) {
+ reply(221, "You could at least say goodbye.");
+ dologout(0);
+ }
+ upper(cp);
+ if (strcmp(cp, "ABOR\r\n") == 0) {
+ tmpline[0] = '\0';
+ reply(426, "Transfer aborted. Data connection closed.");
+ reply(226, "Abort successful");
+ longjmp(urgcatch, 1);
+ }
+ if (strcmp(cp, "STAT\r\n") == 0) {
+ if (file_size != (off_t) -1)
+ reply(213, "Status: %ld of %ld bytes transferred",
+ (long)byte_count,
+ (long)file_size);
+ else
+ reply(213, "Status: %ld bytes transferred"
+ (long)byte_count);
+ }
+#endif
+}
+
+/*
+ * Note: a response of 425 is not mentioned as a possible response to
+ * the PASV command in RFC959. However, it has been blessed as
+ * a legitimate response by Jon Postel in a telephone conversation
+ * with Rick Adams on 25 Jan 89.
+ */
+void
+passive(void)
+{
+ int len;
+ char *p, *a;
+
+ pdata = socket(AF_INET, SOCK_STREAM, 0);
+ if (pdata < 0) {
+ perror_reply(425, "Can't open passive connection");
+ return;
+ }
+ pasv_addr = ctrl_addr;
+ pasv_addr.sin_port = 0;
+ seteuid((uid_t)0);
+ if (bind(pdata, (struct sockaddr *)&pasv_addr, sizeof(pasv_addr)) < 0) {
+ seteuid((uid_t)pw->pw_uid);
+ goto pasv_error;
+ }
+ seteuid((uid_t)pw->pw_uid);
+ len = sizeof(pasv_addr);
+ if (getsockname(pdata, (struct sockaddr *) &pasv_addr, &len) < 0)
+ goto pasv_error;
+ if (listen(pdata, 1) < 0)
+ goto pasv_error;
+ a = (char *) &pasv_addr.sin_addr;
+ p = (char *) &pasv_addr.sin_port;
+
+#define UC(b) (((int) b) & 0xff)
+
+ reply(227, "Entering Passive Mode (%d,%d,%d,%d,%d,%d)", UC(a[0]),
+ UC(a[1]), UC(a[2]), UC(a[3]), UC(p[0]), UC(p[1]));
+ return;
+
+pasv_error:
+ close(pdata);
+ pdata = -1;
+ perror_reply(425, "Can't open passive connection");
+ return;
+}
+
+/*
+ * Generate unique name for file with basename "local".
+ * The file named "local" is already known to exist.
+ * Generates failure reply on error.
+ */
+static char *
+gunique(char *local)
+{
+ static char new[MaxPathLen];
+ struct stat st;
+ int count;
+ char *cp;
+
+ cp = strrchr(local, '/');
+ if (cp)
+ *cp = '\0';
+ if (stat(cp ? local : ".", &st) < 0) {
+ perror_reply(553, cp ? local : ".");
+ return NULL;
+ }
+ if (cp)
+ *cp = '/';
+ for (count = 1; count < 100; count++) {
+ snprintf (new, sizeof(new), "%s.%d", local, count);
+ if (stat(new, &st) < 0)
+ return (new);
+ }
+ reply(452, "Unique file name cannot be created.");
+ return (NULL);
+}
+
+/*
+ * Format and send reply containing system error number.
+ */
+void
+perror_reply(int code, char *string)
+{
+ reply(code, "%s: %s.", string, strerror(errno));
+}
+
+static char *onefile[] = {
+ "",
+ 0
+};
+
+void
+send_file_list(char *whichf)
+{
+ struct stat st;
+ DIR *dirp = NULL;
+ struct dirent *dir;
+ FILE *dout = NULL;
+ char **dirlist, *dirname;
+ int simple = 0;
+ int freeglob = 0;
+ glob_t gl;
+ char buf[MaxPathLen];
+
+ if (strpbrk(whichf, "~{[*?") != NULL) {
+ int flags = GLOB_BRACE|GLOB_NOCHECK|GLOB_QUOTE|GLOB_TILDE;
+
+ memset(&gl, 0, sizeof(gl));
+ freeglob = 1;
+ if (glob(whichf, flags, 0, &gl)) {
+ reply(550, "not found");
+ goto out;
+ } else if (gl.gl_pathc == 0) {
+ errno = ENOENT;
+ perror_reply(550, whichf);
+ goto out;
+ }
+ dirlist = gl.gl_pathv;
+ } else {
+ onefile[0] = whichf;
+ dirlist = onefile;
+ simple = 1;
+ }
+
+ if (setjmp(urgcatch)) {
+ transflag = 0;
+ goto out;
+ }
+ while ((dirname = *dirlist++)) {
+ if (stat(dirname, &st) < 0) {
+ /*
+ * If user typed "ls -l", etc, and the client
+ * used NLST, do what the user meant.
+ */
+ if (dirname[0] == '-' && *dirlist == NULL &&
+ transflag == 0) {
+ retrieve("/bin/ls %s", dirname);
+ goto out;
+ }
+ perror_reply(550, whichf);
+ if (dout != NULL) {
+ fclose(dout);
+ transflag = 0;
+ data = -1;
+ pdata = -1;
+ }
+ goto out;
+ }
+
+ if (S_ISREG(st.st_mode)) {
+ if (dout == NULL) {
+ dout = dataconn("file list", (off_t)-1, "w");
+ if (dout == NULL)
+ goto out;
+ transflag++;
+ }
+ snprintf(buf, sizeof(buf), "%s%s\n", dirname,
+ type == TYPE_A ? "\r" : "");
+ auth_write(fileno(dout), buf, strlen(buf));
+ byte_count += strlen(dirname) + 1;
+ continue;
+ } else if (!S_ISDIR(st.st_mode))
+ continue;
+
+ if ((dirp = opendir(dirname)) == NULL)
+ continue;
+
+ while ((dir = readdir(dirp)) != NULL) {
+ char nbuf[MaxPathLen];
+
+ if (!strcmp(dir->d_name, "."))
+ continue;
+ if (!strcmp(dir->d_name, ".."))
+ continue;
+
+ snprintf(nbuf, sizeof(nbuf), "%s/%s", dirname, dir->d_name);
+
+ /*
+ * We have to do a stat to insure it's
+ * not a directory or special file.
+ */
+ if (simple || (stat(nbuf, &st) == 0 &&
+ S_ISREG(st.st_mode))) {
+ if (dout == NULL) {
+ dout = dataconn("file list", (off_t)-1, "w");
+ if (dout == NULL)
+ goto out;
+ transflag++;
+ }
+ if(strncmp(nbuf, "./", 2) == 0)
+ snprintf(buf, sizeof(buf), "%s%s\n", nbuf +2,
+ type == TYPE_A ? "\r" : "");
+ else
+ snprintf(buf, sizeof(buf), "%s%s\n", nbuf,
+ type == TYPE_A ? "\r" : "");
+ auth_write(fileno(dout), buf, strlen(buf));
+ byte_count += strlen(nbuf) + 1;
+ }
+ }
+ closedir(dirp);
+ }
+ if (dout == NULL)
+ reply(550, "No files found.");
+ else if (ferror(dout) != 0)
+ perror_reply(550, "Data connection");
+ else
+ reply(226, "Transfer complete.");
+
+ transflag = 0;
+ if (dout != NULL){
+ auth_write(fileno(dout), buf, 0); /* XXX flush */
+
+ fclose(dout);
+ }
+ data = -1;
+ pdata = -1;
+out:
+ if (freeglob) {
+ freeglob = 0;
+ globfree(&gl);
+ }
+}
+
+
+int
+find(char *pattern)
+{
+ char line[1024];
+ FILE *f;
+
+ snprintf(line, sizeof(line),
+ "/bin/locate -d %s %s",
+ ftp_rooted("/etc/locatedb"),
+ pattern);
+ f = ftpd_popen(line, "r", 1, 1);
+ if(f == NULL){
+ perror_reply(550, "/bin/locate");
+ return 1;
+ }
+ lreply(200, "Output from find.");
+ while(fgets(line, sizeof(line), f)){
+ if(line[strlen(line)-1] == '\n')
+ line[strlen(line)-1] = 0;
+ nreply("%s", line);
+ }
+ reply(200, "Done");
+ ftpd_pclose(f);
+ return 0;
+}
+
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