1 files changed, 71 insertions, 0 deletions
diff --git a/release/src/router/busybox/loginutils/chpasswd.c b/release/src/router/busybox/loginutils/chpasswd.c
new file mode 100644
index 00000000..4bffbe83
--- /dev/null
+++ b/release/src/router/busybox/loginutils/chpasswd.c
@@ -0,0 +1,71 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * chpasswd.c
+ *
+ * Written for SLIND (from passwd.c) by Alexander Shishkin <virtuoso@slind.org>
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ */
+#include "libbb.h"
+
+#if ENABLE_GETOPT_LONG
+static const char chpasswd_longopts[] ALIGN1 =
+	"encrypted\0" No_argument "e"
+	"md5\0"       No_argument "m"
+	;
+#endif
+
+#define OPT_ENC		1
+#define OPT_MD5		2
+
+int chpasswd_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int chpasswd_main(int argc UNUSED_PARAM, char **argv)
+{
+	char *name, *pass;
+	char salt[sizeof("$N$XXXXXXXX")];
+	int opt, rc;
+	int rnd = rnd; /* we *want* it to be non-initialized! */
+
+	if (getuid())
+		bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
+
+	opt_complementary = "m--e:e--m";
+	USE_GETOPT_LONG(applet_long_options = chpasswd_longopts;)
+	opt = getopt32(argv, "em");
+
+	while ((name = xmalloc_fgetline(stdin)) != NULL) {
+		pass = strchr(name, ':');
+		if (!pass)
+			bb_error_msg_and_die("missing new password");
+		*pass++ = '\0';
+
+		xuname2uid(name); /* dies if there is no such user */
+
+		if (!(opt & OPT_ENC)) {
+			rnd = crypt_make_salt(salt, 1, rnd);
+			if (opt & OPT_MD5) {
+				strcpy(salt, "$1$");
+				rnd = crypt_make_salt(salt + 3, 4, rnd);
+			}
+			pass = pw_encrypt(pass, salt, 0);
+		}
+
+		/* This is rather complex: if user is not found in /etc/shadow,
+		 * we try to find & change his passwd in /etc/passwd */
+#if ENABLE_FEATURE_SHADOWPASSWDS
+		rc = update_passwd(bb_path_shadow_file, name, pass, NULL);
+		if (rc == 0) /* no lines updated, no errors detected */
+#endif
+			rc = update_passwd(bb_path_passwd_file, name, pass, NULL);
+		/* LOGMODE_BOTH logs to syslog also */
+		logmode = LOGMODE_BOTH;
+		if (rc < 0)
+			bb_error_msg_and_die("an error occurred updating password for %s", name);
+		if (rc)
+			bb_info_msg("Password for '%s' changed", name);
+		logmode = LOGMODE_STDIO;
+		free(name);
+		if (!(opt & OPT_ENC))
+			free(pass);
+	}
+	return EXIT_SUCCESS;
+}