Moved 'setup' to the utils directory and converted the build

[citadel.git] / citadel / utils / chkpw.c

diff --git a/citadel/utils/chkpw.c b/citadel/utils/chkpw.c
new file mode 100644 (file)
index 0000000..83e432f
--- /dev/null
+++ b/citadel/utils/chkpw.c
@@ -0,0 +1,138 @@
+// 
+// Copyright (c) 1987-2022 by the citadel.org team
+//
+// This program is open source software.  Use, duplication, or disclosure
+// is subject to the terms of the GNU General Public License, version 3.
+// The program is distributed without any warranty, expressed or implied.
+
+#include <errno.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <pwd.h>
+#include <ctype.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <string.h>
+#include <limits.h>
+#include <dirent.h>
+
+
+#include "citadel.h"
+#include "sysdep.h"
+#include "citadel_dirs.h"
+/* These pipes are used to talk to the chkpwd daemon, which is forked during startup */
+int chkpwd_write_pipe[2];
+int chkpwd_read_pipe[2];
+
+/*
+ * Validate a password on the host unix system by talking to the chkpwd daemon
+ */
+static int validpw(uid_t uid, const char *pass)
+{
+       char buf[256];
+       int rv;
+
+       rv = write(chkpwd_write_pipe[1], &uid, sizeof(uid_t));
+       if (rv == -1) {
+               printf( "Communicatino with chkpwd broken: %s\n", strerror(errno));
+               return 0;
+       }
+
+       rv = write(chkpwd_write_pipe[1], pass, 256);
+       if (rv == -1) {
+               printf( "Communicatino with chkpwd broken: %s\n", strerror(errno));
+               return 0;
+       }
+       rv = read(chkpwd_read_pipe[0], buf, 4);
+       if (rv == -1) {
+               printf( "Communicatino with chkpwd broken: %s\n", strerror(errno));
+               return 0;
+       }
+       if (!strncmp(buf, "PASS", 4)) {
+               printf("pass\n");
+               return(1);
+       }
+
+       printf("fail\n");
+       return 0;
+}
+
+/* 
+ * Start up the chkpwd daemon so validpw() has something to talk to
+ */
+void start_chkpwd_daemon(void) {
+       pid_t chkpwd_pid;
+       struct stat filestats;
+       int i;
+
+       printf("Starting chkpwd daemon for host authentication mode\n");
+
+       if ((stat(file_chkpwd, &filestats)==-1) ||
+           (filestats.st_size==0)){
+               printf("didn't find chkpwd daemon in %s: %s\n", file_chkpwd, strerror(errno));
+               abort();
+       }
+       if (pipe(chkpwd_write_pipe) != 0) {
+               printf("Unable to create pipe for chkpwd daemon: %s\n", strerror(errno));
+               abort();
+       }
+       if (pipe(chkpwd_read_pipe) != 0) {
+               printf("Unable to create pipe for chkpwd daemon: %s\n", strerror(errno));
+               abort();
+       }
+
+       chkpwd_pid = fork();
+       if (chkpwd_pid < 0) {
+               printf("Unable to fork chkpwd daemon: %s\n", strerror(errno));
+               abort();
+       }
+       if (chkpwd_pid == 0) {
+               dup2(chkpwd_write_pipe[0], 0);
+               dup2(chkpwd_read_pipe[1], 1);
+               for (i=2; i<256; ++i) close(i);
+               execl(file_chkpwd, file_chkpwd, NULL);
+               printf("Unable to exec chkpwd daemon: %s\n", strerror(errno));
+               abort();
+               exit(errno);
+       }
+}
+
+
+
+int main(int argc, char **argv) {
+       char buf[256];
+       struct passwd *p;
+       int uid;
+       
+       printf("\n\n ** host auth mode test utility **\n\n");
+       start_chkpwd_daemon();
+
+       if (getuid() != 0){
+               printf("\n\nERROR: you need to be root to run this!\n\n");
+               return(1);
+       }
+       while(1) {
+               printf("\n\nUsername: ");
+               fgets(buf, sizeof buf, stdin);
+               buf[strlen(buf)-1] = 0;
+               p = getpwnam(buf);
+               if (p == NULL) {
+                       printf("Not found\n");
+               }
+               else {
+                       uid = p->pw_uid;
+                       printf("     uid: %d\n", uid);
+                       printf("Password: ");
+                       fgets(buf, sizeof buf, stdin);
+                       buf[strlen(buf)-1] = 0;
+                       validpw(uid, buf);
+               }
+       }
+
+       return(0);
+}