1 files changed, 117 insertions, 0 deletions
diff --git a/src/pam-dotfile-helper.c b/src/pam-dotfile-helper.c
new file mode 100644
index 0000000..04c73de
--- /dev/null
+++ b/src/pam-dotfile-helper.c
@@ -0,0 +1,117 @@
+/***
+  This file is part of pam_dotfile.
+
+  pam_dotfile is free software; you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation; either version 2 of the License, or
+  (at your option) any later version.
+  
+  pam_dotfile is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  General Public License for more details.
+  
+  You should have received a copy of the GNU General Public License
+  along with pam_dotfile; if not, write to the Free Software
+  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+  USA
+***/
+
+#include <string.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <signal.h>
+#include <pwd.h>
+
+#include "common.h"
+#include "log.h"
+
+#define DELAY 5
+
+int main(int argc, char* argv[]) {
+    context_t c;
+    char *username;
+    static char password[128];
+    int r;
+
+    signal(SIGINT, SIG_IGN);
+    signal(SIGQUIT, SIG_IGN);
+    signal(SIGHUP, SIG_IGN);
+    signal(SIGTERM, SIG_IGN);
+    signal(SIGPIPE, SIG_IGN);
+    signal(SIGUSR1, SIG_IGN);
+    signal(SIGUSR2, SIG_IGN);
+    signal(SIGTSTP, SIG_IGN);
+    
+    memset(&c, 0, sizeof(context_t));
+    
+    if (isatty(0) || isatty(1) || isatty(2)) {
+        int n;
+        struct passwd *pw;
+        uid_t uid = getuid();
+
+        pw = getpwuid(uid);
+
+        fprintf(stderr, "This program is not intended to be run in this way.\n");
+        logmsg(&c, LOG_WARNING, "A stupid user (%s; uid=%i) ran pam-dotfile-helper on the command line", pw ? pw->pw_name : "???", uid);
+
+        n = 5;
+        while ((n = sleep(n)) > 0);
+        
+        return 1;
+    }
+
+    if (argc != 7) {
+        logmsg(&c, LOG_WARNING, "Invalid invocation");
+        return 4;
+    }
+
+    c.service = argv[1];
+    username = argv[2];
+
+    if (!strcmp(argv[3], "debug"))
+        c.opt_debug = 1;
+
+    if (!strcmp(argv[4], "no_warn"))
+        c.opt_no_warn = 1;
+
+    if (!strcmp(argv[5], "stat_only_home"))
+	c.opt_stat_only_home = 1;
+
+#ifdef COMPAT05
+    if (!strcmp(argv[6], "nocompat05"))
+        c.opt_nocompat05 = 1;
+#endif
+
+    logmsg(&c, LOG_DEBUG, "%s|%s|%s",
+           c.opt_debug ? "debug" : "nodebug", 
+           c.opt_no_warn ? "no_warn" : "warn"
+#ifdef COMPAT05
+           ,c.opt_nocompat05 ? "nocompat05" : "compat05"
+#endif
+        );
+    
+    if (geteuid() != 0) {
+        logmsg(&c, LOG_WARNING, "Not run as root, executable is probably not SETUID?");
+        return 4;
+    }
+
+    logmsg(&c, LOG_DEBUG, "Helper started");
+
+    if (!fgets(password, sizeof(password), stdin)) {
+        logmsg(&c, LOG_WARNING, "Failure reading from STDIN");
+        return 4;
+    }
+
+    switch (user_authentication(&c, username, password)) {
+        case PAM_SUCCESS: r = 0; break;
+        case PAM_AUTH_ERR: r = 1; break;
+        case PAM_AUTHINFO_UNAVAIL: r = 2; break;
+        case PAM_USER_UNKNOWN: r = 3; break;
+        default: r = 4; break;
+    }
+
+    logmsg(&c, LOG_DEBUG, "Helper exiting with return value %u", r);
+
+    return r;
+}