Initial version of KCM daemon
git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@14544 ec53bebd-3082-4978-b11e-865c3cabbd6b
This commit is contained in:
Luke Howard
179
kcm/acl.c
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179
kcm/acl.c
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/*
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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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* 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 write_pitten 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 OTHEwrite_pISE) 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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RCSID("$Id$");
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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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u_int16_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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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_FIRST:
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case KCM_OP_GET_NEXT:
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case KCM_OP_END_GET:
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case KCM_OP_MAX:
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write_p = 0;
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read_p = 1;
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break;
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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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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->uid == 0) {
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ret = 0;
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goto out;
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}
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}
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mask = 0;
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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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} else 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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} else {
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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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ret = ((ccache->mode & mask) == 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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u_int16_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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