From df49c60c9671e4a28e636964d744c1f59fb6cb68 Mon Sep 17 00:00:00 2001
From: Joel Sherrill <joel.sherrill@OARcorp.com>
Date: Mon, 12 Jun 2000 15:00:15 +0000
Subject: Merged from 4.5.0-beta3a

---
 c/src/exec/librpc/src/rpc/des_crypt.3 | 130 ++++++++++++++++++++++++++++++++++
 1 file changed, 130 insertions(+)

(limited to 'c/src/exec/librpc/src/rpc/des_crypt.3')

diff --git a/c/src/exec/librpc/src/rpc/des_crypt.3 b/c/src/exec/librpc/src/rpc/des_crypt.3
index e69de29bb2..a92f577a56 100644
--- a/c/src/exec/librpc/src/rpc/des_crypt.3
+++ b/c/src/exec/librpc/src/rpc/des_crypt.3
@@ -0,0 +1,130 @@
+.\" @(#)des_crypt.3	2.1 88/08/11 4.0 RPCSRC; from 1.16 88/03/02 SMI;
+.\" $FreeBSD: src/lib/libc/rpc/des_crypt.3,v 1.4 2000/03/02 09:13:45 sheldonh Exp $
+.\"
+.TH DES_CRYPT 3  "6 October 1987"
+.SH NAME
+des_crypt, ecb_crypt, cbc_crypt, des_setparity \- fast DES encryption
+.SH SYNOPSIS
+.nf
+.B #include <des_crypt.h>
+.LP
+.B int ecb_crypt(key, data, datalen, mode)
+.B char *key;
+.B char *data;
+.B unsigned datalen;
+.B unsigned mode;
+.LP
+.B int cbc_crypt(key, data, datalen, mode, ivec)
+.B char *key;
+.B char *data;
+.B unsigned datalen;
+.B unsigned mode;
+.B char *ivec;
+.LP
+.B void des_setparity(key)
+.B char *key;
+.fi
+.SH DESCRIPTION
+.IX encryption cbc_crypt "" \fLcbc_crypt\fP
+.IX "des encryption" cbc_crypt "DES encryption" \fLcbc_crypt\fP
+.IX encryption des_setparity "" \fLdes_setparity\fP
+.IX "des encryption" des_setparity "DES encryption" \fLdes_setparity\fP
+.B ecb_crypt(\|)
+and
+.B cbc_crypt(\|)
+implement the
+.SM NBS
+.SM DES
+(Data Encryption Standard).
+These routines are faster and more general purpose than
+.BR crypt (3).
+They also are able to utilize
+.SM DES
+hardware if it is available.
+.B ecb_crypt(\|)
+encrypts in
+.SM ECB
+(Electronic Code Book)
+mode, which encrypts blocks of data independently.
+.B cbc_crypt(\|)
+encrypts in
+.SM CBC
+(Cipher Block Chaining)
+mode, which chains together
+successive blocks.
+.SM CBC
+mode protects against insertions, deletions and
+substitutions of blocks.
+Also, regularities in the clear text will
+not appear in the cipher text.
+.LP
+Here is how to use these routines.  The first parameter,
+.IR key ,
+is the 8-byte encryption key with parity.
+To set the key's parity, which for
+.SM DES
+is in the low bit of each byte, use
+.IR des_setparity .
+The second parameter,
+.IR data ,
+contains the data to be encrypted or decrypted.
+The
+third parameter,
+.IR datalen ,
+is the length in bytes of
+.IR data ,
+which must be a multiple of 8. The fourth parameter,
+.IR mode ,
+is formed by
+.SM OR\s0'ing
+together some things.  For the encryption direction 'or' in either
+.SM DES_ENCRYPT
+or
+.SM DES_DECRYPT\s0.
+For software versus hardware
+encryption, 'or' in either
+.SM DES_HW
+or
+.SM DES_SW\s0.
+If
+.SM DES_HW
+is specified, and there is no hardware, then the encryption is performed
+in software and the routine returns
+.SM DESERR_NOHWDEVICE\s0.
+For
+.IR cbc_crypt ,
+the parameter
+.I ivec
+is the the 8-byte initialization
+vector for the chaining.  It is updated to the next initialization
+vector upon return.
+.LP
+.SH "SEE ALSO"
+.BR des (1),
+.BR crypt (3)
+.SH DIAGNOSTICS
+.PD 0
+.TP 20
+.SM DESERR_NONE
+No error.
+.TP
+.SM DESERR_NOHWDEVICE
+Encryption succeeded, but done in software instead of the requested hardware.
+.TP
+.SM DESERR_HWERR
+An error occurred in the hardware or driver.
+.TP
+.SM DESERR_BADPARAM
+Bad parameter to routine.
+.PD
+.LP
+Given a result status
+.IR stat ,
+the macro
+.SM DES_FAILED\c
+.BR ( stat )
+is false only for the first two statuses.
+.SH RESTRICTIONS
+These routines are not available in RPCSRC 4.0.
+This information is provided to describe the DES interface expected by
+Secure RPC.
-- 
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