contrib/bind-9.2.4rc7/lib/dns/include/dns/keytable.h

   1 /*
   2  * Copyright (C) 2004  Internet Systems Consortium, Inc. ("ISC")
   3  * Copyright (C) 2000, 2001  Internet Software Consortium.
   4  *
   5  * Permission to use, copy, modify, and 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: keytable.h,v 1.10.2.1 2004/03/09 06:11:16 marka Exp $ */
  19
  20 #ifndef DNS_KEYTABLE_H
  21 #define DNS_KEYTABLE_H 1
  22
  23 /*****
  24  ***** Module Info
  25  *****/
  26
  27 /*
  28  * Key Tables
  29  *
  30  * The keytable module provides services for storing and retrieving DNSSEC
  31  * trusted keys, as well as the ability to find the deepest matching key
  32  * for a given domain name.
  33  *
  34  * MP:
  35  *      The module ensures appropriate synchronization of data structures it
  36  *      creates and manipulates.
  37  *
  38  * Resources:
  39  *      <TBS>
  40  *
  41  * Security:
  42  *      No anticipated impact.
  43  */
  44
  45 #include <isc/lang.h>
  46
  47 #include <dns/types.h>
  48
  49 #include <dst/dst.h>
  50
  51 ISC_LANG_BEGINDECLS
  52
  53 isc_result_t
  54 dns_keytable_create(isc_mem_t *mctx, dns_keytable_t **keytablep);
  55 /*
  56  * Create a keytable.
  57  *
  58  * Requires:
  59  *
  60  *      'mctx' is a valid memory context.
  61  *
  62  *      keytablep != NULL && *keytablep == NULL
  63  *
  64  * Ensures:
  65  *
  66  *      On success, *keytablep is a valid, empty key table.
  67  *
  68  * Returns:
  69  *
  70  *      ISC_R_SUCCESS
  71  *
  72  *      Any other result indicates failure.
  73  */
  74
  75
  76 void
  77 dns_keytable_attach(dns_keytable_t *source, dns_keytable_t **targetp);
  78 /*
  79  * Attach *targetp to source.
  80  *
  81  * Requires:
  82  *
  83  *      'source' is a valid keytable.
  84  *
  85  *      'targetp' points to a NULL dns_keytable_t *.
  86  *
  87  * Ensures:
  88  *
  89  *      *targetp is attached to source.
  90  */
  91
  92 void
  93 dns_keytable_detach(dns_keytable_t **keytablep);
  94 /*
  95  * Detach *keytablep from its keytable.
  96  *
  97  * Requires:
  98  *
  99  *      'keytablep' points to a valid keytable.
 100  *
 101  * Ensures:
 102  *
 103  *      *keytablep is NULL.
 104  *
 105  *      If '*keytablep' is the last reference to the keytable,
 106  *
 107  *              All resources used by the keytable will be freed
 108  */
 109
 110 isc_result_t
 111 dns_keytable_add(dns_keytable_t *keytable, dst_key_t **keyp);
 112 /*
 113  * Add '*keyp' to 'keytable'.
 114  *
 115  * Notes:
 116  *
 117  *      Ownership of *keyp is transferred to the keytable.
 118  *
 119  * Requires:
 120  *
 121  *      keyp != NULL && *keyp is a valid dst_key_t *.
 122  *
 123  * Ensures:
 124  *
 125  *      On success, *keyp == NULL
 126  *
 127  * Returns:
 128  *
 129  *      ISC_R_SUCCESS
 130  *
 131  *      Any other result indicates failure.
 132  */
 133
 134 isc_result_t
 135 dns_keytable_findkeynode(dns_keytable_t *keytable, dns_name_t *name,
 136                          dns_secalg_t algorithm, dns_keytag_t tag,
 137                          dns_keynode_t **keynodep);
 138 /*
 139  * Search for a key named 'name', matching 'algorithm' and 'tag' in
 140  * 'keytable'.
 141  *
 142  * Requires:
 143  *
 144  *      'keytable' is a valid keytable.
 145  *
 146  *      'name' is a valid absolute name.
 147  *
 148  *      keynodep != NULL && *keynodep == NULL
 149  *
 150  * Returns:
 151  *
 152  *      ISC_R_SUCCESS
 153  *      ISC_R_NOTFOUND
 154  *
 155  *      Any other result indicates an error.
 156  */
 157
 158 isc_result_t
 159 dns_keytable_findnextkeynode(dns_keytable_t *keytable, dns_keynode_t *keynode,
 160                                              dns_keynode_t **nextnodep);
 161 /*
 162  * Search for the next key with the same properties as 'keynode' in
 163  * 'keytable'.
 164  *
 165  * Requires:
 166  *
 167  *      'keytable' is a valid keytable.
 168  *
 169  *      'keynode' is a valid keynode.
 170  *
 171  *      nextnodep != NULL && *nextnodep == NULL
 172  *
 173  * Returns:
 174  *
 175  *      ISC_R_SUCCESS
 176  *      ISC_R_NOTFOUND
 177  *
 178  *      Any other result indicates an error.
 179  */
 180
 181 isc_result_t
 182 dns_keytable_finddeepestmatch(dns_keytable_t *keytable, dns_name_t *name,
 183                               dns_name_t *foundname);
 184 /*
 185  * Search for the deepest match of 'name' in 'keytable'.
 186  *
 187  * Requires:
 188  *
 189  *      'keytable' is a valid keytable.
 190  *
 191  *      'name' is a valid absolute name.
 192  *
 193  *      'foundname' is a name with a dedicated buffer.
 194  *
 195  * Returns:
 196  *
 197  *      ISC_R_SUCCESS
 198  *      ISC_R_NOTFOUND
 199  *
 200  *      Any other result indicates an error.
 201  */
 202
 203 void
 204 dns_keytable_detachkeynode(dns_keytable_t *keytable,
 205                            dns_keynode_t **keynodep);
 206 /*
 207  * Give back a keynode found via dns_keytable_findkeynode().
 208  *
 209  * Requires:
 210  *
 211  *      'keytable' is a valid keytable.
 212  *
 213  *      *keynodep is a valid keynode returned by a call to
 214  *      dns_keytable_findkeynode().
 215  *
 216  * Ensures:
 217  *
 218  *      *keynodep == NULL
 219  */
 220
 221 isc_result_t
 222 dns_keytable_issecuredomain(dns_keytable_t *keytable, dns_name_t *name,
 223                             isc_boolean_t *wantdnssecp);
 224 /*
 225  * Is 'name' at or beneath a trusted key?
 226  *
 227  * Requires:
 228  *
 229  *      'keytable' is a valid keytable.
 230  *
 231  *      'name' is a valid absolute name.
 232  *
 233  *      '*wantsdnssecp' is a valid isc_boolean_t.
 234  *
 235  * Ensures:
 236  *
 237  *      On success, *wantsdnssecp will be ISC_TRUE if and only if 'name'
 238  *      is at or beneath a trusted key.
 239  *
 240  * Returns:
 241  *
 242  *      ISC_R_SUCCESS
 243  *
 244  *      Any other result is an error.
 245  */
 246
 247 dst_key_t *
 248 dns_keynode_key(dns_keynode_t *keynode);
 249 /*
 250  * Get the DST key associated with keynode.
 251  */
 252
 253 ISC_LANG_ENDDECLS
 254
 255 #endif /* DNS_KEYTABLE_H */