several new kerberos related libraries and applications to FreeBSD: o kgetcred(1) allows one to manually get a ticket for a particular service. o kf(1) securily forwards ticket to another host through an authenticated and encrypted stream. o kcc(1) is an umbrella program around klist(1), kswitch(1), kgetcred(1) and other user kerberos operations. klist and kswitch are just symlinks to kcc(1) now. o kswitch(1) allows you to easily switch between kerberos credentials if you're running KCM. o hxtool(1) is a certificate management tool to use with PKINIT. o string2key(1) maps a password into key. o kdigest(8) is a userland tool to access the KDC's digest interface. o kimpersonate(8) creates a "fake" ticket for a service. We also now install manpages for some lirbaries that were not installed before, libheimntlm and libhx509. - The new HEIMDAL version no longer supports Kerberos 4. All users are recommended to switch to Kerberos 5. - Weak ciphers are now disabled by default. To enable DES support (used by telnet(8)), use "allow_weak_crypto" option in krb5.conf. - libtelnet, pam_ksu and pam_krb5 are now compiled with error on warnings disabled due to the function they use (krb5_get_err_text(3)) being deprecated. I plan to work on this next. - Heimdal's KDC now require sqlite to operate. We use the bundled version and install it as libheimsqlite. If some other FreeBSD components will require it in the future we can rename it to libbsdsqlite and use for these components as well. - This is not a latest Heimdal version, the new one was released while I was working on the update. I will update it to 1.5.2 soon, as it fixes some important bugs and security issues.
435 lines
11 KiB
C
435 lines
11 KiB
C
/*
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* Copyright (c) 2004 - 2005 Kungliga Tekniska Högskolan
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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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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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size_t 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_message(context, HDB_ERR_MANDATORY_OPTION,
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"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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size_t 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 == (unsigned)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_message(context, ENOMEM, "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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size_t 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_message(context, ret, "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_message(context, ret, "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_message(context, ret, "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_message(context, ENOMEM, "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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else
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krb5_set_error_message(context, ret, "hdb: failed to copy new extension");
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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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size_t 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 == (unsigned)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_pkinit_hash(const hdb_entry *entry, const HDB_Ext_PKINIT_hash **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_cert_hash);
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if (ext)
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*a = &ext->data.u.pkinit_cert_hash;
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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_pkinit_cert(const hdb_entry *entry, const HDB_Ext_PKINIT_cert **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_cert);
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if (ext)
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*a = &ext->data.u.pkinit_cert;
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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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char *str;
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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 xstr;
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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_message(context, HDB_ERR_NO_MKEY,
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"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 = der_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_message(context);
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return ret;
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}
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xstr = pw.data;
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if (xstr[pw.length - 1] != '\0') {
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krb5_set_error_message(context, EINVAL, "malformed password");
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return EINVAL;
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}
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*p = strdup(xstr);
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der_free_octet_string(&pw);
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if (*p == NULL) {
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krb5_set_error_message(context, ENOMEM, "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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ret = krb5_unparse_name(context, entry->principal, &str);
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if (ret == 0) {
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krb5_set_error_message(context, ENOENT,
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"no password attribute for %s", str);
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free(str);
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} else
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krb5_clear_error_message(context);
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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_message(context, HDB_ERR_NO_MKEY,
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"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_message(context, ENOMEM, "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_message(context, ret, "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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krb5_error_code
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hdb_entry_get_ConstrainedDelegACL(const hdb_entry *entry,
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const HDB_Ext_Constrained_delegation_acl **a)
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{
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const HDB_extension *ext;
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ext = hdb_find_extension(entry,
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choice_HDB_extension_data_allowed_to_delegate_to);
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if (ext)
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*a = &ext->data.u.allowed_to_delegate_to;
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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_aliases(const hdb_entry *entry, const HDB_Ext_Aliases **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_aliases);
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if (ext)
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*a = &ext->data.u.aliases;
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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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