diff -ur samba-3.0.7-orig/source/auth/pass_check.c samba-3.0.7/source/auth/pass_check.c
--- samba-3.0.7-orig/source/auth/pass_check.c	Sun Apr  4 03:37:32 2004
+++ samba-3.0.7/source/auth/pass_check.c	Tue Sep 14 14:07:52 2004
@@ -33,6 +33,27 @@
 static fstring this_crypted;
 #endif
 
+#ifdef WITH_SIA
+/* maxiumum entropy <entropy@tappedin.com> */
+#include <sia.h>
+#include <siad.h>
+
+static BOOL sia_auth(char *user, const char *password)
+{ 
+  char *myargv[2];
+  int auth_stat;
+
+  myargv[0] = "samba";
+  myargv[1] = NULL;
+
+  if (sia_validate_user(NULL, 1, myargv, NULL, user, NULL, 0, NULL, password) != SIASUCCESS) {
+    return False;
+  } else {
+    return True;
+  }
+} 
+#endif /* WITH_SIA */
+
 #ifdef WITH_AFS
 
 #include <afs/stds.h>
@@ -502,6 +523,12 @@
 		return NT_STATUS_OK;
 #endif /* WITH_DFS */
 
+#ifdef WITH_SIA
+	if (sia_auth(this_user, password))
+		return NT_STATUS_OK;
+	return NT_STATUS_WRONG_PASSWORD;
+#else
+
 #ifdef OSF1_ENH_SEC
 	
 	ret = (strcmp(osf1_bigcrypt(password, this_salt),
@@ -579,6 +606,7 @@
 	}
 #endif /* HAVE_CRYPT */
 #endif /* HAVE_BIGCRYPT && HAVE_CRYPT && USE_BOTH_CRYPT_CALLS */
+#endif /* WITH_SIA */
 #endif /* WITH_PAM */
 }
 
diff -ur samba-3.0.7-orig/source/configure.in samba-3.0.7/source/configure.in
--- samba-3.0.7-orig/source/configure.in	Sat Sep 11 23:47:18 2004
+++ samba-3.0.7/source/configure.in	Tue Sep 14 14:07:52 2004
@@ -2468,6 +2468,23 @@
   AC_MSG_RESULT(no)
 )
 
+#################################################
+# check for the SIA clear-text auth system
+AC_MSG_CHECKING(whether to use SIA clear-text auth)
+AC_ARG_WITH(sia,
+[  --with-sia              Include SIA clear-text auth support (default=no)],
+[ case "$withval" in
+  yes)
+    AC_MSG_RESULT(yes)
+    AC_DEFINE(WITH_SIA,1,[Whether to include SIA support])
+    ;;
+  *)
+    AC_MSG_RESULT(no)
+    ;;
+  esac ],
+  AC_MSG_RESULT(no)
+)
+
 ########################################################
 # Compile with LDAP support?
 
diff -ur samba-3.0.7-orig/source/include/config.h.in samba-3.0.7/source/include/config.h.in
--- samba-3.0.7-orig/source/include/config.h.in	Sun Sep 12 00:05:12 2004
+++ samba-3.0.7/source/include/config.h.in	Tue Sep 14 14:07:52 2004
@@ -1785,6 +1785,9 @@
 /* Whether to include sendfile() support */
 #undef WITH_SENDFILE
 
+/* Whether to include SIA support */
+#undef WITH_SIA
+
 /* Whether to build smbmount */
 #undef WITH_SMBMOUNT