--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/auth/userinfo-shadow.c	Fri Aug 09 12:15:38 2002 +0300
@@ -0,0 +1,69 @@
+/*
+   Loosely based on auth_shadow.c from popa3d by
+   Solar Designer <solar@openwall.com>
+
+   Copyright (C) 2002 Timo Sirainen
+*/
+
+#define _XOPEN_SOURCE 4
+#define _XOPEN_SOURCE_EXTENDED
+#define _XOPEN_VERSION 4
+#define _XPG4_2
+
+#include "common.h"
+
+#ifdef USERINFO_SHADOW
+
+#include "userinfo.h"
+#include "userinfo-passwd.h"
+
+#include <unistd.h>
+#include <shadow.h>
+
+static int shadow_verify_plain(const char *user, const char *password,
+			       AuthCookieReplyData *reply)
+{
+	struct passwd *pw;
+	struct spwd *spw;
+	char *passdup;
+	int result;
+
+	spw = getspnam(user);
+	if (spw == NULL || !IS_VALID_PASSWD(spw->sp_pwdp))
+		return FALSE;
+
+	/* check if the password is valid */
+        passdup = (char *) t_strdup(password);
+	result = strcmp(crypt(passdup, spw->sp_pwdp), spw->sp_pwdp) == 0;
+
+	/* clear the passwords from memory */
+	memset(passdup, 0, strlen(passdup));
+	memset(spw->sp_pwdp, 0, strlen(spw->sp_pwdp));
+
+	if (!result)
+		return FALSE;
+
+	/* password ok, save the user info */
+	pw = getpwnam(user);
+	if (pw == NULL)
+		return FALSE;
+
+        passwd_fill_cookie_reply(pw, reply);
+	return TRUE;
+}
+
+static void shadow_deinit(void)
+{
+	endpwent();
+        endspent();
+}
+
+UserInfoModule userinfo_shadow = {
+	NULL,
+	shadow_deinit,
+
+	shadow_verify_plain,
+	NULL
+};
+
+#endif