common/auth.c

   1 /* auth.c
   2
   3    Subroutines having to do with authentication. */
   4
   5 /*
   6  * Copyright (c) 1995, 1996, 1997, 1998, 1999
   7  * The Internet Software Consortium.   All rights reserved.
   8  *
   9  * Redistribution and use of this source file, source files derived in whole
  10  * or in part from this source file, and binary files derived in whole or in
  11  * part from this source file, with or without modification, are permitted
  12  * provided that the following conditions are met:
  13  *
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  *    This copyright notice must appear directly below any initial commentary
  17  *    describing the file, and may not be preceded by any other copyright
  18  *    notice.
  19  * 2. Redistributions in binary form must reproduce the above copyright
  20  *    notice, this list of conditions and the following disclaimer in the
  21  *    documentation and/or other materials provided with the distribution.
  22  * 3. Neither the name of The Internet Software Consortium (hereafter
  23  *    referred to as "the ISC") nor the names of its contributors may be
  24  *    used to endorse or promote products derived from this software
  25  *    without specific prior written permission.
  26  * 4. This software is a part of the ISC DHCP Distribution.  Redistributions
  27  *    of this source file or binary files derived from this source file
  28  *    MUST include all documentation accompanying the ISC release from
  29  *    which such redistributions are derived of this source file, specifically
  30  *    the following files (listed relative to the top of the ISC DHCP
  31  *    distribution directory tree):
  32  *
  33  *              README
  34  *              common/dhcp-contrib.5
  35  *              common/dhcp-options.5
  36  *              server/dhcpd.8
  37  *              server/dhcpd.conf.5
  38  *              server/dhcpd.leases.5
  39  *              client/dhclient.8
  40  *              client/dhclient.conf.5
  41  *              client/dhclient-script.8
  42  *              client/dhclient.leases.5
  43  *              relay/dhcrelay.8
  44  *
  45  *    Absence of these files from a distribution you receive does not excuse
  46  *    you from this requirement - if the distribution you receive does not
  47  *    contain these files, you must get them from the ISC and include them
  48  *    in any redistribution of this source file or any derivative work based
  49  *    wholly or in part on this source file.   It is permissible in a binary
  50  *    redistribution derived from this source file to include formatted
  51  *    versions of the manual pages mentioned above, and also to add to or
  52  *    correct the manual pages and README file mentioned above so long as the
  53  *    sections labeled CONTRIBUTIONS in these documents are unchanged except
  54  *    with respect to formatting, so long as the order in which the
  55  *    CONTRIBUTIONS section appears in these documents is not changed, and
  56  *    so long as the dhcp-contrib.5 manual page is unchanged except with
  57  *    respect to formatting.   It is also permissible to redistribute this
  58  *    source file, source files derived wholly or in part from this source
  59  *    file, and binaries derived wholly or in part from this source file
  60  *    accompanied by the aforementioned manual pages translated into another
  61  *    language.   In this case, the CONTRIBUTIONS section and the
  62  *    dhcp-contrib.5 section may either be left in their original language
  63  *    or translated into the new language with such care and diligence as
  64  *    is required to preserve the original meaning.
  65  * 5. If, in addition to the documentation mentioned in section 4, this
  66  *    source file, a source file derived wholly or in part from this source
  67  *    file, or a binary file derived wholly or in part from this source file
  68  *    is redistributed with additional printed or electronic documentation,
  69  *    then that documentation must refer to the dhcp-contrib.5 manual page
  70  *    in as conspicuous a way as the aforementioned documentation refers to
  71  *    it, and the dhcp-contrib.5 manual page must be converted into the same
  72  *    format and be made easily accessible to any recipient of such
  73  *    redistributions.
  74  *
  75  * THIS SOFTWARE IS PROVIDED BY THE ISC AND CONTRIBUTORS ``AS IS'' AND ANY
  76  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  77  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  78  * DISCLAIMED.  IN NO EVENT SHALL THE ISC OR CONTRIBUTORS BE LIABLE FOR ANY
  79  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  80  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  81  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  82  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  83  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
  84  * WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  85  * SUCH DAMAGE.
  86  *
  87  * This software has been written for the ISC by Ted Lemon <mellon@isc.org>
  88  * in cooperation with Vixie Enterprises and Internet Engines, Inc.  To
  89  * learn more about the ISC, see ``http://www.vix.com/isc''.   Development
  90  * of this software is funded through contributions and support contracts.
  91  * Please see the dhcp-contrib manual page that accompanies this file for
  92  * information on how you can contribute.
  93  */
  94
  95 #ifndef lint
  96 static char ocopyright[] =
  97 "$Id: auth.c,v 1.1 1999/02/25 23:30:33 mellon Exp $ Copyright 1995, 1996, 1997, 1998, 1999 The Internet Software Consortium.";
  98 #endif
  99
 100 #include "dhcpd.h"
 101
 102 static struct hash_table *auth_key_hash;
 103
 104 void enter_auth_key (key_id, key)
 105         struct data_string *key_id;
 106         struct auth_key *key;
 107 {
 108         if (!auth_key_hash)
 109                 auth_key_hash = new_hash ();
 110         if (!auth_key_hash)
 111                 log_fatal ("Can't allocate authentication key hash.");
 112         add_hash (auth_key_hash, key_id -> data, key_id -> len,
 113                   (unsigned char *)key);
 114 }
 115
 116 struct auth_key *auth_key_lookup (key_id)
 117         struct data_string *key_id;
 118 {
 119         return (struct auth_key *)hash_lookup (auth_key_hash,
 120                                                key_id -> data, key_id -> len);
 121 }
 122