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Viewing changes to src/lib/crypto/nss/des/weak_key.c

  • Committer: Package Import Robot
  • Author(s): Sam Hartman
  • Date: 2011-12-01 19:34:41 UTC
  • mfrom: (28.1.14 sid)
  • Revision ID: package-import@ubuntu.com-20111201193441-9tipg3aru1jsidyv
Tags: 1.10+dfsg~alpha1-6
http://bugs.debian.org/650671
http://bugs.debian.org/650603
http://bugs.debian.org/650611
* Fix segfault with unknown hostnames in krb5_sname_to_principal,
  Closes: #650671
* Indicate that this library breaks libsmbclient versions that depend on
  krb5_locate_kdc, Closes: #650603, #650611

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src/lib/crypto/nss/des/weak_key.c
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/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
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/*
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 * lib/crypto/openssl/des/weak_key.c
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 *
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 * Copyright 1989,1990,2009 by the Massachusetts Institute of Technology.
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 * All Rights Reserved.
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 *
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 * Export of this software from the United States of America may
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 *   require a specific license from the United States Government.
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 *   It is the responsibility of any person or organization contemplating
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 *   export to obtain such a license before exporting.
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 *
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 * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
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 * distribute this software and its documentation for any purpose and
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 * without fee is hereby granted, provided that the above copyright
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 * notice appear in all copies and that both that copyright notice and
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 * this permission notice appear in supporting documentation, and that
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 * the name of M.I.T. not be used in advertising or publicity pertaining
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 * to distribution of the software without specific, written prior
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 * permission.  Furthermore if you modify this software you must label
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 * your software as modified software and not distribute it in such a
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 * fashion that it might be confused with the original M.I.T. software.
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 * M.I.T. makes no representations about the suitability of
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 * this software for any purpose.  It is provided "as is" without express
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 * or implied warranty.
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 *
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 *
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 * Under U.S. law, this software may not be exported outside the US
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 * without license from the U.S. Commerce department.
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 *
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 * These routines form the library interface to the DES facilities.
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 *
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 * Originally written 8/85 by Steve Miller, MIT Project Athena.
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 */
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#include "des_int.h"
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/*
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 * The following are the weak DES keys:
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 */
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static const mit_des_cblock weak[16] = {
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    /* weak keys */
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    {0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01},
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    {0xfe,0xfe,0xfe,0xfe,0xfe,0xfe,0xfe,0xfe},
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    {0x1f,0x1f,0x1f,0x1f,0x0e,0x0e,0x0e,0x0e},
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    {0xe0,0xe0,0xe0,0xe0,0xf1,0xf1,0xf1,0xf1},
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    /* semi-weak */
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    {0x01,0xfe,0x01,0xfe,0x01,0xfe,0x01,0xfe},
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    {0xfe,0x01,0xfe,0x01,0xfe,0x01,0xfe,0x01},
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    {0x1f,0xe0,0x1f,0xe0,0x0e,0xf1,0x0e,0xf1},
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    {0xe0,0x1f,0xe0,0x1f,0xf1,0x0e,0xf1,0x0e},
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    {0x01,0xe0,0x01,0xe0,0x01,0xf1,0x01,0xf1},
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    {0xe0,0x01,0xe0,0x01,0xf1,0x01,0xf1,0x01},
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    {0x1f,0xfe,0x1f,0xfe,0x0e,0xfe,0x0e,0xfe},
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    {0xfe,0x1f,0xfe,0x1f,0xfe,0x0e,0xfe,0x0e},
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    {0x01,0x1f,0x01,0x1f,0x01,0x0e,0x01,0x0e},
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    {0x1f,0x01,0x1f,0x01,0x0e,0x01,0x0e,0x01},
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    {0xe0,0xfe,0xe0,0xfe,0xf1,0xfe,0xf1,0xfe},
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    {0xfe,0xe0,0xfe,0xe0,0xfe,0xf1,0xfe,0xf1}
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};
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/*
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 * mit_des_is_weak_key: returns true iff key is a [semi-]weak des key.
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 *
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 * Requires: key has correct odd parity.
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 */
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int
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mit_des_is_weak_key(mit_des_cblock key)
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{
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    unsigned int i;
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    const mit_des_cblock *weak_p = weak;
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    for (i = 0; i < (sizeof(weak)/sizeof(mit_des_cblock)); i++) {
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        if (!memcmp(weak_p++,key,sizeof(mit_des_cblock)))
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            return 1;
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    }
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    return 0;
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}