Citadel Client: move into its own directory

[citadel.git] / textclient / src / client_passwords.c

diff --git a/textclient/src/client_passwords.c b/textclient/src/client_passwords.c
new file mode 100644 (file)
index 0000000..aabb7d9
--- /dev/null
+++ b/textclient/src/client_passwords.c
@@ -0,0 +1,152 @@
+/*
+ * Functions which allow the client to remember usernames and passwords for
+ * various sites.
+ *
+ * Copyright (c) 1987-2012 by the citadel.org team
+ *
+ *  This program is open source software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 3.
+ *
+ *  This program 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.
+ */
+
+#include "sysdep.h"
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <ctype.h>
+#include <pwd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <limits.h>
+#include <stdio.h>
+#include <libcitadel.h>
+#include "citadel.h"
+#include "citadel_ipc.h"
+#include "commands.h"
+#include "client_passwords.h"
+
+#define PWFILENAME "%s/.citadel.passwords"
+
+void determine_pwfilename(char *pwfile, size_t n) {
+       struct passwd *p;
+
+       p = getpwuid(getuid());
+       if (p == NULL) strcpy(pwfile, "");
+       snprintf(pwfile, n, PWFILENAME, p->pw_dir);
+}
+
+
+/*
+ * Check the password file for a host/port match; if found, stuff the user
+ * name and password into the user/pass buffers
+ */
+void get_stored_password(
+               char *host,
+               char *port,
+               char *username,
+               char *password) {
+
+       char pwfile[PATH_MAX];
+       FILE *fp;
+       char buf[SIZ];
+       char buf64[SIZ];
+       char hostbuf[256], portbuf[256], ubuf[256], pbuf[256];
+
+       strcpy(username, "");
+       strcpy(password, "");
+
+       determine_pwfilename(pwfile, sizeof pwfile);
+       if (IsEmptyStr(pwfile)) return;
+
+       fp = fopen(pwfile, "r");
+       if (fp == NULL) return;
+       while (fgets(buf64, sizeof buf64, fp) != NULL) {
+               CtdlDecodeBase64(buf, buf64, sizeof(buf64));
+               extract_token(hostbuf, buf, 0, '|', sizeof hostbuf);
+               extract_token(portbuf, buf, 1, '|', sizeof portbuf);
+               extract_token(ubuf, buf, 2, '|', sizeof ubuf);
+               extract_token(pbuf, buf, 3, '|', sizeof pbuf);
+
+               if (!strcasecmp(hostbuf, host)) {
+                       if (!strcasecmp(portbuf, port)) {
+                               strcpy(username, ubuf);
+                               strcpy(password, pbuf);
+                       }
+               }
+       }
+       fclose(fp);
+}
+
+
+/*
+ * Set (or clear) stored passwords.
+ */
+void set_stored_password(
+               char *host,
+               char *port,
+               char *username,
+               char *password) {
+
+       char pwfile[PATH_MAX];
+       FILE *fp, *oldfp;
+       char buf[SIZ];
+       char buf64[SIZ];
+       char hostbuf[256], portbuf[256], ubuf[256], pbuf[256];
+
+       determine_pwfilename(pwfile, sizeof pwfile);
+       if (IsEmptyStr(pwfile)) return;
+
+       oldfp = fopen(pwfile, "r");
+       if (oldfp == NULL) oldfp = fopen("/dev/null", "r");
+       unlink(pwfile);
+       fp = fopen(pwfile, "w");
+       if (fp == NULL) fp = fopen("/dev/null", "w");
+       while (fgets(buf64, sizeof buf64, oldfp) != NULL) {
+               CtdlDecodeBase64(buf, buf64, sizeof(buf64));
+               extract_token(hostbuf, buf, 0, '|', sizeof hostbuf);
+               extract_token(portbuf, buf, 1, '|', sizeof portbuf);
+               extract_token(ubuf, buf, 2, '|', sizeof ubuf);
+               extract_token(pbuf, buf, 3, '|', sizeof pbuf);
+
+               if ( (strcasecmp(hostbuf, host)) 
+                  || (strcasecmp(portbuf, port)) ) {
+                       snprintf(buf, sizeof buf, "%s|%s|%s|%s|",
+                               hostbuf, portbuf, ubuf, pbuf);
+                       CtdlEncodeBase64(buf64, buf, strlen(buf), 0);
+                       fprintf(fp, "%s\n", buf64);
+               }
+       }
+       if (!IsEmptyStr(username)) {
+               snprintf(buf, sizeof buf, "%s|%s|%s|%s|",
+                       host, port, username, password);
+               CtdlEncodeBase64(buf64, buf, strlen(buf), 0);
+               fprintf(fp, "%s\n", buf64);
+       }
+       fclose(oldfp);
+       fclose(fp);
+       chmod(pwfile, 0600);
+}
+
+
+/*
+ * Set the password if the user wants to, clear it otherwise 
+ */
+void offer_to_remember_password(CtdlIPC *ipc,
+               char *host,
+               char *port,
+               char *username,
+               char *password) {
+
+       if (rc_remember_passwords) {
+               if (boolprompt("Remember username/password for this site", 0)) {
+                       set_stored_password(host, port, username, password);
+               }
+               else {
+                       set_stored_password(host, port, "", "");
+               }
+       }
+}