3 * Bill Paul <wpaul@ctr.columbia.edu>. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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9 * notice, this list of conditions and the following disclaimer.
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12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by Bill Paul.
16 * 4. Neither the name of the author nor the names of any co-contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
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32 * $FreeBSD: src/include/rpcsvc/crypt.x,v 1.3 1999/08/27 23:45:08 peter Exp $
33 * $DragonFly: src/include/rpcsvc/crypt.x,v 1.2 2003/06/17 04:25:58 dillon Exp $
37 * This protocol definition exists because of the U.S. government and
38 * its stupid export laws. We can't export DES code from the United
39 * States to other countries (even though the code already exists
40 * outside the U.S. -- go figure that one out) but we need to make
41 * Secure RPC work. The normal way around this is to break the DES
42 * code out into a shared library; we can then provide a dummy lib
43 * in the base OS and provide the real lib in the secure dist, which
44 * the user can install later. But we need Secure RPC for NIS+, and
45 * there are several system programs that use NIS+ which are statically
46 * linked. We would have to provide replacements for these programs
47 * in the secure dist, but there are a lot, and this is a pain. The
48 * shared lib trick won't work for these programs, and we can't change
49 * them once they're compiled.
51 * One solution for this problem is to do the DES encryption as a system
52 * call; no programs need to be changed and we can even supply the DES
53 * support as an LKM. But this bloats the kernel. Maybe if we have
54 * Secure NFS one day this will be worth it, but for now we should keep
55 * this mess in user space.
57 * So we have this second solution: we provide a server that does the
58 * DES encryption for us. In this case, the server is keyserv (we need
59 * it to make Secure RPC work anyway) and we use this protocol to ship
60 * the data back and forth between keyserv and the application.
63 enum des_dir { ENCRYPT_DES, DECRYPT_DES };
64 enum des_mode { CBC_DES, ECB_DES };
67 u_char des_key[8]; /* key (with low bit parity) */
68 des_dir des_dir; /* direction */
69 des_mode des_mode; /* mode */
70 u_char des_ivec[8]; /* input vector */
83 DES_CRYPT(desargs) = 1;