1 files changed, 77 insertions, 0 deletions
diff --git a/loginutils/chpasswd.c b/loginutils/chpasswd.c
new file mode 100644
index 0000000..124fc86
--- /dev/null
+++ b/loginutils/chpasswd.c
@@ -0,0 +1,77 @@
+/* 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
+#include <getopt.h>
+
+static const struct option chpasswd_opts[] = {
+	{ "encrypted", no_argument, NULL, 'e' },
+	{ "md5", no_argument, NULL, 'm' },
+	{ NULL, 0, NULL, 0 }
+};
+#endif
+
+#define OPT_ENC		1
+#define OPT_MD5		2
+
+int chpasswd_main(int argc, char **argv);
+int chpasswd_main(int argc, char **argv)
+{
+	char *name, *pass;
+	char salt[sizeof("$N$XXXXXXXX")];
+	int opt, rc;
+	int rnd = rnd; /* we *want* it to be non-initialized! */
+	const char *pwfile = bb_path_passwd_file;
+
+	if (getuid() != 0)
+		bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
+
+#if ENABLE_FEATURE_SHADOWPASSWDS
+	if (access(bb_path_shadow_file, F_OK) == 0)
+		pwfile = bb_path_shadow_file;
+#endif
+
+ 	opt_complementary = "m--e";
+	USE_GETOPT_LONG(applet_long_options = chpasswd_opts;)
+	opt = getopt32(argc, argv, "em");
+
+	while ((name = xmalloc_getline(stdin)) != NULL) {
+		pass = strchr(name, ':');
+		if (!pass)
+			bb_error_msg_and_die("missing new password");
+		*pass++ = '\0';
+
+		//if (!getpwnam(name))
+		//	bb_error_msg_and_die("unknown user %s", name);
+
+		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);
+		}
+
+		rc = update_passwd(pwfile, name, pass);
+		/* LOGMODE_BOTH logs to syslog */
+		logmode = LOGMODE_BOTH;
+		if (rc < 0)
+			bb_error_msg_and_die("an error occurred updating %s", pwfile);
+		if (rc > 0)
+			bb_info_msg("Password for '%s' changed", name);
+		else
+			bb_info_msg("User '%s' not found", name);
+		logmode = LOGMODE_STDIO;
+		free(name);
+	}
+
+	return 0;
+}