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.
389 lines
9.8 KiB
C
389 lines
9.8 KiB
C
/*
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* Copyright (c) 1997 - 2001 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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#if HAVE_NDBM
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#if defined(HAVE_GDBM_NDBM_H)
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#include <gdbm/ndbm.h>
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#define WRITE_SUPPORT 1
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#elif defined(HAVE_NDBM_H)
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#include <ndbm.h>
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#elif defined(HAVE_DBM_H)
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#define WRITE_SUPPORT 1
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#include <dbm.h>
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#endif
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struct ndbm_db {
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DBM *db;
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int lock_fd;
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};
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static krb5_error_code
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NDBM_destroy(krb5_context context, HDB *db)
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{
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hdb_clear_master_key (context, db);
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free(db->hdb_name);
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free(db);
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return 0;
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}
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static krb5_error_code
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NDBM_lock(krb5_context context, HDB *db, int operation)
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{
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struct ndbm_db *d = db->hdb_db;
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return hdb_lock(d->lock_fd, operation);
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}
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static krb5_error_code
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NDBM_unlock(krb5_context context, HDB *db)
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{
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struct ndbm_db *d = db->hdb_db;
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return hdb_unlock(d->lock_fd);
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}
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static krb5_error_code
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NDBM_seq(krb5_context context, HDB *db,
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unsigned flags, hdb_entry_ex *entry, int first)
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{
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struct ndbm_db *d = (struct ndbm_db *)db->hdb_db;
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datum key, value;
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krb5_data key_data, data;
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krb5_error_code ret = 0;
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if(first)
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key = dbm_firstkey(d->db);
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else
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key = dbm_nextkey(d->db);
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if(key.dptr == NULL)
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return HDB_ERR_NOENTRY;
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key_data.data = key.dptr;
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key_data.length = key.dsize;
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ret = db->hdb_lock(context, db, HDB_RLOCK);
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if(ret) return ret;
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value = dbm_fetch(d->db, key);
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db->hdb_unlock(context, db);
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data.data = value.dptr;
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data.length = value.dsize;
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memset(entry, 0, sizeof(*entry));
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if(hdb_value2entry(context, &data, &entry->entry))
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return NDBM_seq(context, db, flags, entry, 0);
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if (db->hdb_master_key_set && (flags & HDB_F_DECRYPT)) {
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ret = hdb_unseal_keys (context, db, &entry->entry);
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if (ret)
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hdb_free_entry (context, entry);
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}
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if (ret == 0 && entry->entry.principal == NULL) {
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entry->entry.principal = malloc (sizeof(*entry->entry.principal));
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if (entry->entry.principal == NULL) {
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hdb_free_entry (context, entry);
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ret = ENOMEM;
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krb5_set_error_message(context, ret, "malloc: out of memory");
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} else {
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hdb_key2principal (context, &key_data, entry->entry.principal);
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}
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}
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return ret;
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}
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static krb5_error_code
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NDBM_firstkey(krb5_context context, HDB *db,unsigned flags,hdb_entry_ex *entry)
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{
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return NDBM_seq(context, db, flags, entry, 1);
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}
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static krb5_error_code
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NDBM_nextkey(krb5_context context, HDB *db, unsigned flags,hdb_entry_ex *entry)
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{
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return NDBM_seq(context, db, flags, entry, 0);
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}
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static krb5_error_code
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open_lock_file(krb5_context context, const char *db_name, int *fd)
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{
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char *lock_file;
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/* lock old and new databases */
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asprintf(&lock_file, "%s.lock", db_name);
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if(lock_file == 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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*fd = open(lock_file, O_RDWR | O_CREAT, 0600);
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free(lock_file);
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if(*fd < 0) {
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int ret = errno;
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krb5_set_error_message(context, ret, "open(%s): %s", lock_file,
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strerror(ret));
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return ret;
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}
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return 0;
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}
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static krb5_error_code
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NDBM_rename(krb5_context context, HDB *db, const char *new_name)
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{
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int ret;
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char *old_dir, *old_pag, *new_dir, *new_pag;
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int old_lock_fd, new_lock_fd;
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/* lock old and new databases */
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ret = open_lock_file(context, db->hdb_name, &old_lock_fd);
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if (ret)
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return ret;
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ret = hdb_lock(old_lock_fd, HDB_WLOCK);
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if(ret) {
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close(old_lock_fd);
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return ret;
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}
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ret = open_lock_file(context, new_name, &new_lock_fd);
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if (ret) {
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hdb_unlock(old_lock_fd);
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close(old_lock_fd);
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return ret;
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}
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ret = hdb_lock(new_lock_fd, HDB_WLOCK);
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if(ret) {
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hdb_unlock(old_lock_fd);
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close(old_lock_fd);
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close(new_lock_fd);
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return ret;
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}
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asprintf(&old_dir, "%s.dir", db->hdb_name);
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asprintf(&old_pag, "%s.pag", db->hdb_name);
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asprintf(&new_dir, "%s.dir", new_name);
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asprintf(&new_pag, "%s.pag", new_name);
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ret = rename(old_dir, new_dir) || rename(old_pag, new_pag);
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if (ret) {
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ret = errno;
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if (ret == 0)
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ret = EPERM;
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krb5_set_error_message(context, ret, "rename: %s", strerror(ret));
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}
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free(old_dir);
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free(old_pag);
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free(new_dir);
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free(new_pag);
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hdb_unlock(new_lock_fd);
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hdb_unlock(old_lock_fd);
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close(new_lock_fd);
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close(old_lock_fd);
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if(ret)
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return ret;
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free(db->hdb_name);
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db->hdb_name = strdup(new_name);
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return 0;
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}
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static krb5_error_code
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NDBM__get(krb5_context context, HDB *db, krb5_data key, krb5_data *reply)
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{
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struct ndbm_db *d = (struct ndbm_db *)db->hdb_db;
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datum k, v;
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int code;
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k.dptr = key.data;
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k.dsize = key.length;
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code = db->hdb_lock(context, db, HDB_RLOCK);
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if(code)
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return code;
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v = dbm_fetch(d->db, k);
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db->hdb_unlock(context, db);
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if(v.dptr == NULL)
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return HDB_ERR_NOENTRY;
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krb5_data_copy(reply, v.dptr, v.dsize);
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return 0;
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}
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static krb5_error_code
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NDBM__put(krb5_context context, HDB *db, int replace,
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krb5_data key, krb5_data value)
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{
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#ifdef WRITE_SUPPORT
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struct ndbm_db *d = (struct ndbm_db *)db->hdb_db;
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datum k, v;
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int code;
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k.dptr = key.data;
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k.dsize = key.length;
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v.dptr = value.data;
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v.dsize = value.length;
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code = db->hdb_lock(context, db, HDB_WLOCK);
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if(code)
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return code;
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code = dbm_store(d->db, k, v, replace ? DBM_REPLACE : DBM_INSERT);
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db->hdb_unlock(context, db);
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if(code == 1)
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return HDB_ERR_EXISTS;
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if (code < 0)
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return code;
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return 0;
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#else
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return HDB_ERR_NO_WRITE_SUPPORT;
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#endif
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}
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static krb5_error_code
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NDBM__del(krb5_context context, HDB *db, krb5_data key)
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{
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struct ndbm_db *d = (struct ndbm_db *)db->hdb_db;
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datum k;
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int code;
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krb5_error_code ret;
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k.dptr = key.data;
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k.dsize = key.length;
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ret = db->hdb_lock(context, db, HDB_WLOCK);
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if(ret) return ret;
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code = dbm_delete(d->db, k);
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db->hdb_unlock(context, db);
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if(code < 0)
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return errno;
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return 0;
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}
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static krb5_error_code
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NDBM_close(krb5_context context, HDB *db)
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{
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struct ndbm_db *d = db->hdb_db;
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dbm_close(d->db);
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close(d->lock_fd);
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free(d);
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return 0;
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}
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static krb5_error_code
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NDBM_open(krb5_context context, HDB *db, int flags, mode_t mode)
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{
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krb5_error_code ret;
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struct ndbm_db *d = malloc(sizeof(*d));
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if(d == 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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d->db = dbm_open((char*)db->hdb_name, flags, mode);
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if(d->db == NULL){
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ret = errno;
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free(d);
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krb5_set_error_message(context, ret, "dbm_open(%s): %s", db->hdb_name,
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strerror(ret));
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return ret;
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}
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ret = open_lock_file(context, db->hdb_name, &d->lock_fd);
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if (ret) {
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ret = errno;
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dbm_close(d->db);
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free(d);
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krb5_set_error_message(context, ret, "open(lock file): %s",
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strerror(ret));
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return ret;
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}
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db->hdb_db = d;
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if((flags & O_ACCMODE) == O_RDONLY)
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ret = hdb_check_db_format(context, db);
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else
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ret = hdb_init_db(context, db);
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if(ret == HDB_ERR_NOENTRY)
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return 0;
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if (ret) {
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NDBM_close(context, db);
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krb5_set_error_message(context, ret, "hdb_open: failed %s database %s",
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(flags & O_ACCMODE) == O_RDONLY ?
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"checking format of" : "initialize",
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db->hdb_name);
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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_ndbm_create(krb5_context context, HDB **db,
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const char *filename)
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{
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*db = calloc(1, sizeof(**db));
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if (*db == 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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(*db)->hdb_db = NULL;
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(*db)->hdb_name = strdup(filename);
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if ((*db)->hdb_name == NULL) {
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free(*db);
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*db = 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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(*db)->hdb_master_key_set = 0;
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(*db)->hdb_openp = 0;
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(*db)->hdb_capability_flags = HDB_CAP_F_HANDLE_ENTERPRISE_PRINCIPAL;
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(*db)->hdb_open = NDBM_open;
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(*db)->hdb_close = NDBM_close;
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(*db)->hdb_fetch_kvno = _hdb_fetch_kvno;
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(*db)->hdb_store = _hdb_store;
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(*db)->hdb_remove = _hdb_remove;
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(*db)->hdb_firstkey = NDBM_firstkey;
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(*db)->hdb_nextkey= NDBM_nextkey;
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(*db)->hdb_lock = NDBM_lock;
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(*db)->hdb_unlock = NDBM_unlock;
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(*db)->hdb_rename = NDBM_rename;
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(*db)->hdb__get = NDBM__get;
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(*db)->hdb__put = NDBM__put;
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(*db)->hdb__del = NDBM__del;
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(*db)->hdb_destroy = NDBM_destroy;
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return 0;
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}
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#endif /* HAVE_NDBM */
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