HDB extensions access glue.
git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@15912 ec53bebd-3082-4978-b11e-865c3cabbd6b
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Love Hörnquist Åstrand
366
lib/hdb/ext.c
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366
lib/hdb/ext.c
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/*
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* Copyright (c) 2004 - 2005 Kungliga Tekniska H<>gskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "hdb_locl.h"
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#include <der.h>
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RCSID("$Id$");
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krb5_error_code
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hdb_entry_check_mandatory(krb5_context context, const hdb_entry *ent)
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{
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int i;
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if (ent->extensions == NULL)
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return 0;
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/*
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* check for unknown extensions and if they where tagged mandatory
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*/
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for (i = 0; i < ent->extensions->len; i++) {
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if (ent->extensions->val[i].data.element !=
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choice_HDB_extension_data_asn1_ellipsis)
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continue;
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if (ent->extensions->val[i].mandatory) {
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krb5_set_error_string(context, "Principal have unknown "
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"mandatory extension");
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return HDB_ERR_MANDATORY_OPTION;
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}
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}
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return 0;
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}
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HDB_extension *
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hdb_find_extension(const hdb_entry *entry, int type)
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{
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int i;
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if (entry->extensions == NULL)
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return NULL;
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for (i = 0; i < entry->extensions->len; i++)
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if (entry->extensions->val[i].data.element == type)
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return &entry->extensions->val[i];
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return NULL;
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}
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/*
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* Replace the extension `ext' in `entry'. Make a copy of the
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* extension, so the caller must still free `ext' on both success and
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* failure. Returns 0 or error code.
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*/
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krb5_error_code
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hdb_replace_extension(krb5_context context,
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hdb_entry *entry,
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const HDB_extension *ext)
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{
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HDB_extension *ext2;
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HDB_extension *es;
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int ret;
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ext2 = NULL;
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if (entry->extensions == NULL) {
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entry->extensions = calloc(1, sizeof(*entry->extensions));
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if (entry->extensions == NULL) {
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krb5_set_error_string(context, "malloc: out of memory");
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return ENOMEM;
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}
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} else if (ext->data.element != choice_HDB_extension_data_asn1_ellipsis) {
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ext2 = hdb_find_extension(entry, ext->data.element);
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} else {
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/*
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* This is an unknown extention, and we are asked to replace a
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* possible entry in `entry' that is of the same type. This
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* might seem impossible, but ASN.1 CHOICE comes to our
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* rescue. The first tag in each branch in the CHOICE is
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* unique, so just find the element in the list that have the
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* same tag was we are putting into the list.
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*/
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Der_class replace_class, list_class;
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Der_type replace_type, list_type;
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unsigned int replace_tag, list_tag;
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size_t size;
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int i;
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ret = der_get_tag(ext->data.u.asn1_ellipsis.data,
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ext->data.u.asn1_ellipsis.length,
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&replace_class, &replace_type, &replace_tag,
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&size);
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if (ret) {
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krb5_set_error_string(context, "hdb: failed to decode "
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"replacement hdb extention");
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return ret;
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}
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for (i = 0; i < entry->extensions->len; i++) {
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HDB_extension *ext3 = &entry->extensions->val[i];
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if (ext3->data.element != choice_HDB_extension_data_asn1_ellipsis)
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continue;
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ret = der_get_tag(ext3->data.u.asn1_ellipsis.data,
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ext3->data.u.asn1_ellipsis.length,
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&list_class, &list_type, &list_tag,
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&size);
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if (ret) {
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krb5_set_error_string(context, "hdb: failed to decode "
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"present hdb extention");
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return ret;
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}
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if (MAKE_TAG(replace_class,replace_type,replace_type) ==
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MAKE_TAG(list_class,list_type,list_type)) {
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ext2 = ext3;
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break;
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}
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}
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}
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if (ext2) {
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free_HDB_extension(ext2);
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ret = copy_HDB_extension(ext, ext2);
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if (ret)
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krb5_set_error_string(context, "hdb: failed to copy replacement "
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"hdb extention");
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return ret;
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}
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es = realloc(entry->extensions->val,
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(entry->extensions->len+1)*sizeof(entry->extensions->val[0]));
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if (es == NULL) {
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krb5_set_error_string(context, "malloc: out of memory");
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return ENOMEM;
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}
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entry->extensions->val = es;
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ret = copy_HDB_extension(ext,
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&entry->extensions->val[entry->extensions->len]);
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if (ret == 0) {
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entry->extensions->len++;
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krb5_set_error_string(context, "hdb: failed to copy new extension");
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}
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return ret;
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}
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krb5_error_code
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hdb_clear_extension(krb5_context context,
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hdb_entry *entry,
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int type)
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{
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int i;
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if (entry->extensions == NULL)
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return 0;
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for (i = 0; i < entry->extensions->len; i++) {
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if (entry->extensions->val[i].data.element == type) {
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free_HDB_extension(&entry->extensions->val[i]);
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memmove(&entry->extensions->val[i],
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&entry->extensions->val[i + 1],
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sizeof(entry->extensions->val[i]) * (entry->extensions->len - i - 1));
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entry->extensions->len--;
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}
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}
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if (entry->extensions->len == 0) {
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free(entry->extensions->val);
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free(entry->extensions);
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entry->extensions = NULL;
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}
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return 0;
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}
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krb5_error_code
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hdb_entry_get_pkinit_acl(const hdb_entry *entry, const HDB_Ext_PKINIT_acl **a)
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{
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const HDB_extension *ext;
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ext = hdb_find_extension(entry, choice_HDB_extension_data_pkinit_acl);
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if (ext)
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*a = &ext->data.u.pkinit_acl;
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else
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*a = NULL;
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return 0;
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}
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krb5_error_code
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hdb_entry_get_pw_change_time(const hdb_entry *entry, time_t *t)
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{
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const HDB_extension *ext;
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ext = hdb_find_extension(entry, choice_HDB_extension_data_last_pw_change);
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if (ext)
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*t = ext->data.u.last_pw_change;
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else
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*t = 0;
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return 0;
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}
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krb5_error_code
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hdb_entry_set_pw_change_time(krb5_context context,
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hdb_entry *entry,
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time_t t)
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{
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HDB_extension ext;
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ext.mandatory = FALSE;
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ext.data.element = choice_HDB_extension_data_last_pw_change;
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if (t == 0)
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t = time(NULL);
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ext.data.u.last_pw_change = t;
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return hdb_replace_extension(context, entry, &ext);
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}
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int
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hdb_entry_get_password(krb5_context context, HDB *db,
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const hdb_entry *entry, char **p)
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{
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HDB_extension *ext;
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int ret;
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ext = hdb_find_extension(entry, choice_HDB_extension_data_password);
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if (ext) {
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heim_utf8_string str;
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heim_octet_string pw;
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if (db->hdb_master_key_set && ext->data.u.password.mkvno) {
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hdb_master_key key;
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key = _hdb_find_master_key(ext->data.u.password.mkvno,
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db->hdb_master_key);
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if (key == NULL) {
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krb5_set_error_string(context, "master key %d missing",
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*ext->data.u.password.mkvno);
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return HDB_ERR_NO_MKEY;
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}
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ret = _hdb_mkey_decrypt(context, key, HDB_KU_MKEY,
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ext->data.u.password.password.data,
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ext->data.u.password.password.length,
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&pw);
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} else {
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ret = copy_octet_string(&ext->data.u.password.password, &pw);
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}
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if (ret) {
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krb5_clear_error_string(context);
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return ret;
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}
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str = pw.data;
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if (str[pw.length - 1] != '\0') {
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krb5_set_error_string(context, "password malformated");
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return EINVAL;
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}
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*p = strdup(str);
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free_octet_string(&pw);
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if (*p == NULL) {
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krb5_set_error_string(context, "malloc: out of memory");
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return ENOMEM;
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}
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return 0;
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}
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krb5_set_error_string(context, "password attribute not found");
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return ENOENT;
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}
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int
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hdb_entry_set_password(krb5_context context, HDB *db,
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hdb_entry *entry, const char *p)
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{
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HDB_extension ext;
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hdb_master_key key;
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int ret;
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ext.mandatory = FALSE;
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ext.data.element = choice_HDB_extension_data_password;
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if (db->hdb_master_key_set) {
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key = _hdb_find_master_key(NULL, db->hdb_master_key);
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if (key == NULL) {
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krb5_set_error_string(context, "hdb_entry_set_password: "
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"failed to find masterkey");
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return HDB_ERR_NO_MKEY;
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}
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ret = _hdb_mkey_encrypt(context, key, HDB_KU_MKEY,
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p, strlen(p) + 1,
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&ext.data.u.password.password);
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if (ret)
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return ret;
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ext.data.u.password.mkvno =
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malloc(sizeof(*ext.data.u.password.mkvno));
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if (ext.data.u.password.mkvno == NULL) {
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free_HDB_extension(&ext);
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krb5_set_error_string(context, "malloc: out of memory");
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return ENOMEM;
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}
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*ext.data.u.password.mkvno = _hdb_mkey_version(key);
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} else {
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ext.data.u.password.mkvno = NULL;
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ret = krb5_data_copy(&ext.data.u.password.password,
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p, strlen(p) + 1);
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if (ret) {
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krb5_set_error_string(context, "malloc: out of memory");
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free_HDB_extension(&ext);
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return ret;
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}
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}
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ret = hdb_replace_extension(context, entry, &ext);
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free_HDB_extension(&ext);
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return ret;
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}
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int
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hdb_entry_clear_password(krb5_context context, hdb_entry *entry)
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{
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return hdb_clear_extension(context, entry,
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choice_HDB_extension_data_password);
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}
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