/* * Copyright (c) 2005, PADL Software Pty Ltd. * All rights reserved. * * Portions Copyright (c) 2009 Apple Inc. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * 3. Neither the name of PADL Software nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY PADL SOFTWARE AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL PADL SOFTWARE OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include "kcm_locl.h" krb5_error_code kcm_access(krb5_context context, kcm_client *client, kcm_operation opcode, kcm_ccache ccache) { krb5_error_code ret; KCM_ASSERT_VALID(ccache); if (ccache->flags & KCM_FLAGS_OWNER_IS_SYSTEM) { /* Let root always read system caches */ if (CLIENT_IS_ROOT(client)) { ret = 0; } else { ret = KRB5_FCC_PERM; } } else if (kcm_is_same_session(client, ccache->uid, ccache->session)) { /* same session same as owner */ ret = 0; } else { ret = KRB5_FCC_PERM; } if (ret) { kcm_log(2, "Process %d is not permitted to call %s on cache %s", client->pid, kcm_op2string(opcode), ccache->name); } return ret; } krb5_error_code kcm_chmod(krb5_context context, kcm_client *client, kcm_ccache ccache, uint16_t mode) { KCM_ASSERT_VALID(ccache); /* System cache mode can only be set at startup */ if (ccache->flags & KCM_FLAGS_OWNER_IS_SYSTEM) return KRB5_FCC_PERM; if (ccache->uid != client->uid) return KRB5_FCC_PERM; return 0; } krb5_error_code kcm_chown(krb5_context context, kcm_client *client, kcm_ccache ccache, uid_t uid) { KCM_ASSERT_VALID(ccache); /* System cache owner can only be set at startup */ if (ccache->flags & KCM_FLAGS_OWNER_IS_SYSTEM) return KRB5_FCC_PERM; if (ccache->uid != client->uid && client->uid != 0) return KRB5_FCC_PERM; HEIMDAL_MUTEX_lock(&ccache->mutex); ccache->uid = uid; HEIMDAL_MUTEX_unlock(&ccache->mutex); return 0; }