--- xscreensaver-5.43/driver/passwd-pwent.c.orig	2016-04-08 04:17:03.000000000 +0200
+++ xscreensaver-5.43/driver/passwd-pwent.c	2019-09-17 19:06:53.759749500 +0200
@@ -81,6 +81,12 @@
 
 #   define HAVE_BIGCRYPT
 
+#elif defined(__CYGWIN__)
+#   include <windows.h>
+#   include <sys/cygwin.h>
+    /* Use the following define to determine the Windows version */
+#   define is_winnt        (GetVersion() < 0x80000000)
+
 #endif
 
 
@@ -178,8 +184,16 @@
   if (user && *user && !result)
     {					/* Check non-shadow passwords too. */
       struct passwd *p = getpwnam(user);
+#ifdef __CYGWIN__
+      if (p)
+         /* Patch the typical password test: user will be reused later on */
+         if (is_winnt)
+           result = strdup(user);
+#else
       if (p && passwd_known_p (p->pw_passwd))
+
 	result = strdup(p->pw_passwd);
+#endif
     }
 
   /* The manual for passwd(4) on HPUX 10.10 says:
@@ -265,6 +279,26 @@
   if (s && !strcmp (s, ciphertext))
     return True;
 
+#ifdef __CYGWIN__
+  /* Patch the typical password test. */
+  if (is_winnt)
+    {
+       HANDLE token;
+       struct passwd *user_pwd_entry = getpwnam (ciphertext); /* remember we "saved" username here */
+ 
+       /* Try to get the access token from NT. */
+       token = cygwin_logon_user (user_pwd_entry, cleartext);
+       if (token == INVALID_HANDLE_VALUE)
+           return False;
+       /* Inform Cygwin about the new impersonation token.
+          Cygwin is able now, to switch to that user context by
+          setuid or seteuid calls. */
+       cygwin_set_impersonation_token (token);
+       return True;
+    }
+  else
+#endif /* CYGWIN */
+
 #ifdef HAVE_BIGCRYPT
   /* There seems to be no way to tell at runtime if an HP machine is in
      "trusted" mode, and thereby, which of crypt() or bigcrypt() we should