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.
202 lines
5.0 KiB
C
202 lines
5.0 KiB
C
/*
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* Copyright (c) 2005, PADL Software Pty Ltd.
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* All rights reserved.
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*
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* Portions Copyright (c) 2009 Apple Inc. 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 PADL Software 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 PADL SOFTWARE 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 PADL SOFTWARE 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 "kcm_locl.h"
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krb5_error_code
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kcm_access(krb5_context context,
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kcm_client *client,
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kcm_operation opcode,
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kcm_ccache ccache)
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{
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int read_p = 0;
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int write_p = 0;
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uint16_t mask;
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krb5_error_code ret;
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KCM_ASSERT_VALID(ccache);
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switch (opcode) {
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case KCM_OP_INITIALIZE:
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case KCM_OP_DESTROY:
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case KCM_OP_STORE:
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case KCM_OP_REMOVE_CRED:
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case KCM_OP_SET_FLAGS:
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case KCM_OP_CHOWN:
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case KCM_OP_CHMOD:
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case KCM_OP_GET_INITIAL_TICKET:
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case KCM_OP_GET_TICKET:
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case KCM_OP_MOVE_CACHE:
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case KCM_OP_SET_DEFAULT_CACHE:
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case KCM_OP_SET_KDC_OFFSET:
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write_p = 1;
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read_p = 0;
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break;
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case KCM_OP_NOOP:
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case KCM_OP_GET_NAME:
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case KCM_OP_RESOLVE:
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case KCM_OP_GEN_NEW:
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case KCM_OP_RETRIEVE:
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case KCM_OP_GET_PRINCIPAL:
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case KCM_OP_GET_CRED_UUID_LIST:
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case KCM_OP_GET_CRED_BY_UUID:
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case KCM_OP_GET_CACHE_UUID_LIST:
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case KCM_OP_GET_CACHE_BY_UUID:
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case KCM_OP_GET_DEFAULT_CACHE:
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case KCM_OP_GET_KDC_OFFSET:
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write_p = 0;
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read_p = 1;
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break;
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default:
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ret = KRB5_FCC_PERM;
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goto out;
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}
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if (ccache->flags & KCM_FLAGS_OWNER_IS_SYSTEM) {
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/* System caches cannot be reinitialized or destroyed by users */
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if (opcode == KCM_OP_INITIALIZE ||
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opcode == KCM_OP_DESTROY ||
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opcode == KCM_OP_REMOVE_CRED ||
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opcode == KCM_OP_MOVE_CACHE) {
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ret = KRB5_FCC_PERM;
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goto out;
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}
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/* Let root always read system caches */
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if (CLIENT_IS_ROOT(client)) {
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ret = 0;
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goto out;
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}
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}
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/* start out with "other" mask */
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mask = S_IROTH|S_IWOTH;
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/* root can do anything */
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if (CLIENT_IS_ROOT(client)) {
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if (read_p)
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mask |= S_IRUSR|S_IRGRP|S_IROTH;
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if (write_p)
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mask |= S_IWUSR|S_IWGRP|S_IWOTH;
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}
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/* same session same as owner */
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if (kcm_is_same_session(client, ccache->uid, ccache->session)) {
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if (read_p)
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mask |= S_IROTH;
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if (write_p)
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mask |= S_IWOTH;
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}
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/* owner */
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if (client->uid == ccache->uid) {
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if (read_p)
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mask |= S_IRUSR;
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if (write_p)
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mask |= S_IWUSR;
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}
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/* group */
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if (client->gid == ccache->gid) {
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if (read_p)
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mask |= S_IRGRP;
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if (write_p)
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mask |= S_IWGRP;
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}
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ret = (ccache->mode & mask) ? 0 : KRB5_FCC_PERM;
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out:
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if (ret) {
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kcm_log(2, "Process %d is not permitted to call %s on cache %s",
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client->pid, kcm_op2string(opcode), ccache->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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kcm_chmod(krb5_context context,
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kcm_client *client,
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kcm_ccache ccache,
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uint16_t mode)
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{
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KCM_ASSERT_VALID(ccache);
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/* System cache mode can only be set at startup */
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if (ccache->flags & KCM_FLAGS_OWNER_IS_SYSTEM)
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return KRB5_FCC_PERM;
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if (ccache->uid != client->uid)
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return KRB5_FCC_PERM;
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if (ccache->gid != client->gid)
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return KRB5_FCC_PERM;
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HEIMDAL_MUTEX_lock(&ccache->mutex);
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ccache->mode = mode;
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HEIMDAL_MUTEX_unlock(&ccache->mutex);
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return 0;
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}
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krb5_error_code
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kcm_chown(krb5_context context,
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kcm_client *client,
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kcm_ccache ccache,
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uid_t uid,
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gid_t gid)
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{
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KCM_ASSERT_VALID(ccache);
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/* System cache owner can only be set at startup */
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if (ccache->flags & KCM_FLAGS_OWNER_IS_SYSTEM)
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return KRB5_FCC_PERM;
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if (ccache->uid != client->uid)
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return KRB5_FCC_PERM;
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if (ccache->gid != client->gid)
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return KRB5_FCC_PERM;
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HEIMDAL_MUTEX_lock(&ccache->mutex);
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ccache->uid = uid;
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ccache->gid = gid;
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HEIMDAL_MUTEX_unlock(&ccache->mutex);
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return 0;
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}
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