diff --git a/builds/posix/Makefile.in.extauth b/builds/posix/Makefile.in.extauth
new file mode 100644
index 0000000..30fc9dd
--- /dev/null
+++ b/builds/posix/Makefile.in.extauth
@@ -0,0 +1,92 @@
+#  The contents of this file are subject to the Initial
+#  Developer's Public License Version 1.0 (the "License");
+#  you may not use this file except in compliance with the
+#  License. You may obtain a copy of the License at
+#  https://www.firebirdsql.org/en/initial-developer-s-public-license-version-1-0/
+#
+#  Software distributed under the License is distributed AS IS,
+#  WITHOUT WARRANTY OF ANY KIND, either express or implied.
+#  See the License for the specific language governing rights
+#  and limitations under the License.
+#
+#  The Original Code was created by Alexander Peshkoff
+#  for the Firebird Open Source RDBMS project.
+#
+#  Copyright (c) 2020 Alexander Peshkoff <peshkoff@mail.ru>
+#  and all contributors signed below.
+#
+#  All Rights Reserved.
+#  Contributor(s): ______________________________________.
+
+ifndef ROOT
+  ROOT=../..
+endif
+#ROOT=$(shell cd ../..; pwd)
+
+PLUGINS=$(ROOT)/plugins
+BIN=$(ROOT)/bin
+LIB=$(ROOT)/lib
+
+LIB_PREFIX=
+SHRLIB_EXT=@SHRLIB_EXT@
+EXEC_EXT=@EXEEXT@
+
+ifndef INTERMED
+  INTERMED=.
+endif
+
+ifdef OUT
+  OUT_BIN=$(OUT)/bin
+  OUT_PLUG=$(OUT)/plugins
+else
+  OUT_BIN=.
+  OUT_PLUG=.
+endif
+
+TOMCRYPT_COMPILE=-DUSE_LTM -DLTM_DESC
+
+SIMPLE_KEY_AUTH_NAME=$(LIB_PREFIX)fbSampleExtAuth.$(SHRLIB_EXT)
+BLD_SIMPLE_KEY_AUTH=$(OUT_PLUG)/$(SIMPLE_KEY_AUTH_NAME)
+SIMPLE_KEY_AUTH=$(PLUGINS)/$(SIMPLE_KEY_AUTH_NAME)
+
+KEYGEN_NAME=fbSampleExtAuthKeygen$(EXEC_EXT)
+BLD_KEYGEN=$(OUT_BIN)/$(KEYGEN_NAME)
+KEYGEN=$(BIN)/$(KEYGEN_NAME)
+
+KEYGEN_objects=$(INTERMED)/keygen.o
+TCWRAP_objects=$(INTERMED)/TcWrapper.o
+KEY_AUTH_objects=$(INTERMED)/ExtAuth.o
+
+CXXFLAGS=-std=c++17 -I$(ROOT)/include $(TOMCRYPT_COMPILE)
+LDFLAGS=-L$(LIB)
+
+LINK_LIBS=-lfbclient -ltomcrypt -ltommath
+
+$(INTERMED)/%.o: ./%.cpp
+	$(CXX) $(CXXFLAGS) -c $(firstword $<) -o $@
+
+.PHONY:		all keygen plugin install
+
+all:		keygen plugin
+
+keygen:		$(BLD_KEYGEN)
+
+$(BLD_KEYGEN):	$(KEYGEN_objects) $(TCWRAP_objects)
+	$(CXX) $(LDFLAGS) $^ -o $@ $(LINK_LIBS)
+
+plugin:		$(BLD_SIMPLE_KEY_AUTH)
+
+$(BLD_SIMPLE_KEY_AUTH):	$(KEY_AUTH_objects) $(TCWRAP_objects)
+	$(CXX) -shared $(LDFLAGS) $^ -o $@ $(LINK_LIBS)
+
+clean:
+	rm -f $(INTERMED)/*.o* $(BLD_KEYGEN) $(BLD_SIMPLE_KEY_AUTH)
+
+install:	$(SIMPLE_KEY_AUTH) $(KEYGEN)
+
+$(SIMPLE_KEY_AUTH): $(BLD_SIMPLE_KEY_AUTH)
+	cp $^ $@
+
+$(KEYGEN): $(BLD_KEYGEN)
+	cp $^ $@
+
diff --git a/configure.ac b/configure.ac
index 3d03ce3..6783f9b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1651,6 +1651,11 @@ case "$PLATFORM" in
 AC_CONFIG_FILES(
 gen/make.platform.solaris.examples:${MAKE_SRC_DIR}/make.platform.solaris.examples
 )
+;;
+  win32 )
+AC_CONFIG_FILES(
+examples/extauth/Makefile:${MAKE_SRC_DIR}/Makefile.in.extauth
+)
 ;;
 esac
 
