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diff --git a/tirpc/rpcsvc/crypt.x b/tirpc/rpcsvc/crypt.x
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+/*
+ * Copyright (c) 1996
+ *      Bill Paul <wpaul@ctr.columbia.edu>.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by Bill Paul.
+ * 4. Neither the name of the author nor the names of any co-contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL Bill Paul OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef RPC_HDR
+%#include <sys/cdefs.h>
+%__FBSDID("$FreeBSD: src/include/rpcsvc/crypt.x,v 1.5 2003/05/04 02:51:42 obrien Exp $");
+#endif
+
+/*
+ * This protocol definition exists because of the U.S. government and
+ * its stupid export laws. We can't export DES code from the United
+ * States to other countries (even though the code already exists
+ * outside the U.S. -- go figure that one out) but we need to make
+ * Secure RPC work. The normal way around this is to break the DES
+ * code out into a shared library; we can then provide a dummy lib
+ * in the base OS and provide the real lib in the secure dist, which
+ * the user can install later. But we need Secure RPC for NIS+, and
+ * there are several system programs that use NIS+ which are statically
+ * linked. We would have to provide replacements for these programs
+ * in the secure dist, but there are a lot, and this is a pain. The
+ * shared lib trick won't work for these programs, and we can't change
+ * them once they're compiled.
+ *
+ * One solution for this problem is to do the DES encryption as a system
+ * call; no programs need to be changed and we can even supply the DES
+ * support as an LKM. But this bloats the kernel. Maybe if we have
+ * Secure NFS one day this will be worth it, but for now we should keep
+ * this mess in user space.
+ *
+ * So we have this second solution: we provide a server that does the
+ * DES encryption for us. In this case, the server is keyserv (we need
+ * it to make Secure RPC work anyway) and we use this protocol to ship
+ * the data back and forth between keyserv and the application.
+ */
+
+enum des_dir { ENCRYPT_DES, DECRYPT_DES };
+enum des_mode { CBC_DES, ECB_DES };
+
+struct desargs {
+        u_char des_key[8];      /* key (with low bit parity) */
+        des_dir des_dir;        /* direction */
+        des_mode des_mode;      /* mode */
+        u_char des_ivec[8];     /* input vector */
+        opaque desbuf<>;
+};
+
+struct desresp {
+        opaque desbuf<>;
+        u_char des_ivec[8];
+        int stat;
+};
+
+program CRYPT_PROG {
+        version CRYPT_VERS {
+                desresp
+                DES_CRYPT(desargs) = 1;
+        } = 1; 
+} = 600100029;