diff options
Diffstat (limited to 'libexec')
| -rw-r--r-- | libexec/ftpd/ftpd.c | 35 |
1 files changed, 27 insertions, 8 deletions
diff --git a/libexec/ftpd/ftpd.c b/libexec/ftpd/ftpd.c index 119c575..78ebc7c 100644 --- a/libexec/ftpd/ftpd.c +++ b/libexec/ftpd/ftpd.c @@ -244,7 +244,7 @@ static void sigurg(int); static void maskurg(int); static void flagxfer(int); static int myoob(void); -static int checkuser(char *, char *, int, char **); +static int checkuser(char *, char *, int, char **, int *); static FILE *dataconn(char *, off_t, char *); static void dolog(struct sockaddr *); static void end_login(void); @@ -996,6 +996,7 @@ static char curname[MAXLOGNAME]; /* current USER name */ void user(char *name) { + int ecode; char *cp, *shell; if (logged_in) { @@ -1016,8 +1017,11 @@ user(char *name) pw = sgetpwnam("ftp"); #endif if (strcmp(name, "ftp") == 0 || strcmp(name, "anonymous") == 0) { - if (checkuser(_PATH_FTPUSERS, "ftp", 0, NULL) || - checkuser(_PATH_FTPUSERS, "anonymous", 0, NULL)) + if (checkuser(_PATH_FTPUSERS, "ftp", 0, NULL, &ecode) || + (ecode != 0 && ecode != ENOENT)) + reply(530, "User %s access denied.", name); + else if (checkuser(_PATH_FTPUSERS, "anonymous", 0, NULL, &ecode) || + (ecode != 0 && ecode != ENOENT)) reply(530, "User %s access denied.", name); else if (pw != NULL) { guest = 1; @@ -1045,7 +1049,9 @@ user(char *name) break; endusershell(); - if (cp == NULL || checkuser(_PATH_FTPUSERS, name, 1, NULL)) { + if (cp == NULL || + (checkuser(_PATH_FTPUSERS, name, 1, NULL, &ecode) || + (ecode != 0 && ecode != ENOENT))) { reply(530, "User %s access denied.", name); if (logging) syslog(LOG_NOTICE, @@ -1087,13 +1093,15 @@ user(char *name) * of the matching line in "residue" if not NULL. */ static int -checkuser(char *fname, char *name, int pwset, char **residue) +checkuser(char *fname, char *name, int pwset, char **residue, int *ecode) { FILE *fd; int found = 0; size_t len; char *line, *mp, *p; + if (ecode != NULL) + *ecode = 0; if ((fd = fopen(fname, "r")) != NULL) { while (!found && (line = fgetln(fd, &len)) != NULL) { /* skip comments */ @@ -1162,7 +1170,8 @@ nextline: free(mp); } (void) fclose(fd); - } + } else if (ecode != NULL) + *ecode = errno; return (found); } @@ -1359,7 +1368,7 @@ auth_pam(struct passwd **ppw, const char *pass) void pass(char *passwd) { - int rval; + int rval, ecode; FILE *fd; #ifdef LOGIN_CAP login_cap_t *lc = NULL; @@ -1475,11 +1484,21 @@ skip: #endif dochroot = - checkuser(_PATH_FTPCHROOT, pw->pw_name, 1, &residue) + checkuser(_PATH_FTPCHROOT, pw->pw_name, 1, &residue, &ecode) #ifdef LOGIN_CAP /* Allow login.conf configuration as well */ || login_getcapbool(lc, "ftp-chroot", 0) #endif ; + /* + * It is possible that checkuser() failed to open the chroot file. + * If this is the case, report that logins are un-available, since we + * have no way of checking whether or not the user should be chrooted. + * We ignore ENOENT since it is not required that this file be present. + */ + if (ecode != 0 && ecode != ENOENT) { + reply(530, "Login not available right now."); + return; + } chrootdir = NULL; /* Disable wtmp logging when chrooting. */ |
