contrib/bind-9.5.2/lib/dns/include/dns/ssu.h

   1 /*
   2  * Copyright (C) 2004-2007  Internet Systems Consortium, Inc. ("ISC")
   3  * Copyright (C) 2000, 2001, 2003  Internet Software Consortium.
   4  *
   5  * Permission to use, copy, modify, and/or distribute this software for any
   6  * purpose with or without fee is hereby granted, provided that the above
   7  * copyright notice and this permission notice appear in all copies.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
  10  * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
  11  * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
  12  * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
  13  * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
  14  * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  15  * PERFORMANCE OF THIS SOFTWARE.
  16  */
  17
  18 /* $Id: ssu.h,v 1.21 2007/06/19 23:47:17 tbox Exp $ */
  19
  20 #ifndef DNS_SSU_H
  21 #define DNS_SSU_H 1
  22
  23 /*! \file dns/ssu.h */
  24
  25 #include <isc/lang.h>
  26
  27 #include <dns/types.h>
  28
  29 ISC_LANG_BEGINDECLS
  30
  31 #define DNS_SSUMATCHTYPE_NAME           0
  32 #define DNS_SSUMATCHTYPE_SUBDOMAIN      1
  33 #define DNS_SSUMATCHTYPE_WILDCARD       2
  34 #define DNS_SSUMATCHTYPE_SELF           3
  35 #define DNS_SSUMATCHTYPE_SELFSUB        4
  36 #define DNS_SSUMATCHTYPE_SELFWILD       5
  37 #define DNS_SSUMATCHTYPE_SELFKRB5       6
  38 #define DNS_SSUMATCHTYPE_SELFMS         7
  39 #define DNS_SSUMATCHTYPE_SUBDOMAINMS    8
  40 #define DNS_SSUMATCHTYPE_SUBDOMAINKRB5  9
  41 #define DNS_SSUMATCHTYPE_MAX            9  /* max value */
  42
  43 isc_result_t
  44 dns_ssutable_create(isc_mem_t *mctx, dns_ssutable_t **table);
  45 /*%<
  46  *      Creates a table that will be used to store simple-secure-update rules.
  47  *      Note: all locking must be provided by the client.
  48  *
  49  *      Requires:
  50  *\li           'mctx' is a valid memory context
  51  *\li           'table' is not NULL, and '*table' is NULL
  52  *
  53  *      Returns:
  54  *\li           ISC_R_SUCCESS
  55  *\li           ISC_R_NOMEMORY
  56  */
  57
  58 void
  59 dns_ssutable_attach(dns_ssutable_t *source, dns_ssutable_t **targetp);
  60 /*%<
  61  *      Attach '*targetp' to 'source'.
  62  *
  63  *      Requires:
  64  *\li           'source' is a valid SSU table
  65  *\li           'targetp' points to a NULL dns_ssutable_t *.
  66  *
  67  *      Ensures:
  68  *\li           *targetp is attached to source.
  69  */
  70
  71 void
  72 dns_ssutable_detach(dns_ssutable_t **tablep);
  73 /*%<
  74  *      Detach '*tablep' from its simple-secure-update rule table.
  75  *
  76  *      Requires:
  77  *\li           'tablep' points to a valid dns_ssutable_t
  78  *
  79  *      Ensures:
  80  *\li           *tablep is NULL
  81  *\li           If '*tablep' is the last reference to the SSU table, all
  82  *                      resources used by the table will be freed.
  83  */
  84
  85 isc_result_t
  86 dns_ssutable_addrule(dns_ssutable_t *table, isc_boolean_t grant,
  87                      dns_name_t *identity, unsigned int matchtype,
  88                      dns_name_t *name, unsigned int ntypes,
  89                      dns_rdatatype_t *types);
  90 /*%<
  91  *      Adds a new rule to a simple-secure-update rule table.  The rule
  92  *      either grants or denies update privileges of an identity (or set of
  93  *      identities) to modify a name (or set of names) or certain types present
  94  *      at that name.
  95  *
  96  *      Notes:
  97  *\li           If 'matchtype' is of SELF type, this rule only matches if the
  98  *              name to be updated matches the signing identity.
  99  *
 100  *\li           If 'ntypes' is 0, this rule applies to all types except
 101  *              NS, SOA, RRSIG, and NSEC.
 102  *
 103  *\li           If 'types' includes ANY, this rule applies to all types
 104  *              except NSEC.
 105  *
 106  *      Requires:
 107  *\li           'table' is a valid SSU table
 108  *\li           'identity' is a valid absolute name
 109  *\li           'matchtype' must be one of the defined constants.
 110  *\li           'name' is a valid absolute name
 111  *\li           If 'ntypes' > 0, 'types' must not be NULL
 112  *
 113  *      Returns:
 114  *\li           ISC_R_SUCCESS
 115  *\li           ISC_R_NOMEMORY
 116  */
 117
 118 isc_boolean_t
 119 dns_ssutable_checkrules(dns_ssutable_t *table, dns_name_t *signer,
 120                         dns_name_t *name, dns_rdatatype_t type);
 121 /*%<
 122  *      Checks that the attempted update of (name, type) is allowed according
 123  *      to the rules specified in the simple-secure-update rule table.  If
 124  *      no rules are matched, access is denied.  If signer is NULL, access
 125  *      is denied.
 126  *
 127  *      Requires:
 128  *\li           'table' is a valid SSU table
 129  *\li           'signer' is NULL or a valid absolute name
 130  *\li           'name' is a valid absolute name
 131  */
 132
 133
 134 /*% Accessor functions to extract rule components */
 135 isc_boolean_t   dns_ssurule_isgrant(const dns_ssurule_t *rule);
 136 /*% Accessor functions to extract rule components */
 137 dns_name_t *    dns_ssurule_identity(const dns_ssurule_t *rule);
 138 /*% Accessor functions to extract rule components */
 139 unsigned int    dns_ssurule_matchtype(const dns_ssurule_t *rule);
 140 /*% Accessor functions to extract rule components */
 141 dns_name_t *    dns_ssurule_name(const dns_ssurule_t *rule);
 142 /*% Accessor functions to extract rule components */
 143 unsigned int    dns_ssurule_types(const dns_ssurule_t *rule,
 144                                   dns_rdatatype_t **types);
 145
 146 isc_result_t    dns_ssutable_firstrule(const dns_ssutable_t *table,
 147                                        dns_ssurule_t **rule);
 148 /*%<
 149  * Initiates a rule iterator.  There is no need to maintain any state.
 150  *
 151  * Returns:
 152  *\li   #ISC_R_SUCCESS
 153  *\li   #ISC_R_NOMORE
 154  */
 155
 156 isc_result_t    dns_ssutable_nextrule(dns_ssurule_t *rule,
 157                                       dns_ssurule_t **nextrule);
 158 /*%<
 159  * Returns the next rule in the table.
 160  *
 161  * Returns:
 162  *\li   #ISC_R_SUCCESS
 163  *\li   #ISC_R_NOMORE
 164  */
 165
 166 ISC_LANG_ENDDECLS
 167
 168 #endif /* DNS_SSU_H */