676 lines
14 KiB
C
676 lines
14 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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HEIMDAL_MUTEX ccache_mutex = HEIMDAL_MUTEX_INITIALIZER;
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kcm_ccache_data *ccache_head = NULL;
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static unsigned int ccache_nextid = 0;
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char *kcm_ccache_nextid(pid_t pid, uid_t uid, gid_t gid)
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{
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unsigned n;
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char *name;
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HEIMDAL_MUTEX_lock(&ccache_mutex);
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n = ++ccache_nextid;
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HEIMDAL_MUTEX_unlock(&ccache_mutex);
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asprintf(&name, "%ld:%u", (long)uid, n);
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return name;
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}
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krb5_error_code
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kcm_ccache_resolve(krb5_context context,
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const char *name,
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kcm_ccache *ccache)
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{
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kcm_ccache p;
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krb5_error_code ret;
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*ccache = NULL;
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ret = KRB5_FCC_NOFILE;
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HEIMDAL_MUTEX_lock(&ccache_mutex);
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for (p = ccache_head; p != NULL; p = p->next) {
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if ((p->flags & KCM_FLAGS_VALID) == 0)
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continue;
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if (strcmp(p->name, name) == 0) {
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ret = 0;
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break;
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}
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}
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if (ret == 0) {
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kcm_retain_ccache(context, p);
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*ccache = p;
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}
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HEIMDAL_MUTEX_unlock(&ccache_mutex);
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return ret;
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}
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krb5_error_code
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kcm_ccache_resolve_by_uuid(krb5_context context,
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kcmuuid_t uuid,
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kcm_ccache *ccache)
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{
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kcm_ccache p;
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krb5_error_code ret;
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*ccache = NULL;
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ret = KRB5_FCC_NOFILE;
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HEIMDAL_MUTEX_lock(&ccache_mutex);
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for (p = ccache_head; p != NULL; p = p->next) {
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if ((p->flags & KCM_FLAGS_VALID) == 0)
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continue;
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if (memcmp(p->uuid, uuid, sizeof(kcmuuid_t)) == 0) {
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ret = 0;
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break;
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}
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}
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if (ret == 0) {
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kcm_retain_ccache(context, p);
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*ccache = p;
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}
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HEIMDAL_MUTEX_unlock(&ccache_mutex);
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return ret;
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}
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krb5_error_code
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kcm_ccache_get_uuids(krb5_context context, kcm_client *client, kcm_operation opcode, krb5_storage *sp)
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{
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krb5_error_code ret;
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kcm_ccache p;
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ret = KRB5_FCC_NOFILE;
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HEIMDAL_MUTEX_lock(&ccache_mutex);
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for (p = ccache_head; p != NULL; p = p->next) {
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if ((p->flags & KCM_FLAGS_VALID) == 0)
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continue;
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ret = kcm_access(context, client, opcode, p);
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if (ret) {
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ret = 0;
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continue;
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}
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krb5_storage_write(sp, p->uuid, sizeof(p->uuid));
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}
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HEIMDAL_MUTEX_unlock(&ccache_mutex);
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return ret;
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}
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krb5_error_code kcm_debug_ccache(krb5_context context)
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{
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kcm_ccache p;
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for (p = ccache_head; p != NULL; p = p->next) {
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char *cpn = NULL, *spn = NULL;
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int ncreds = 0;
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struct kcm_creds *k;
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if ((p->flags & KCM_FLAGS_VALID) == 0) {
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kcm_log(7, "cache %08x: empty slot");
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continue;
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}
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KCM_ASSERT_VALID(p);
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for (k = p->creds; k != NULL; k = k->next)
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ncreds++;
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if (p->client != NULL)
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krb5_unparse_name(context, p->client, &cpn);
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if (p->server != NULL)
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krb5_unparse_name(context, p->server, &spn);
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kcm_log(7, "cache %08x: name %s refcnt %d flags %04x mode %04o "
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"uid %d gid %d client %s server %s ncreds %d",
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p, p->name, p->refcnt, p->flags, p->mode, p->uid, p->gid,
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(cpn == NULL) ? "<none>" : cpn,
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(spn == NULL) ? "<none>" : spn,
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ncreds);
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if (cpn != NULL)
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free(cpn);
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if (spn != NULL)
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free(spn);
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}
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return 0;
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}
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static void
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kcm_free_ccache_data_internal(krb5_context context,
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kcm_ccache_data *cache)
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{
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KCM_ASSERT_VALID(cache);
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if (cache->name != NULL) {
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free(cache->name);
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cache->name = NULL;
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}
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if (cache->flags & KCM_FLAGS_USE_KEYTAB) {
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krb5_kt_close(context, cache->key.keytab);
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cache->key.keytab = NULL;
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} else if (cache->flags & KCM_FLAGS_USE_CACHED_KEY) {
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krb5_free_keyblock_contents(context, &cache->key.keyblock);
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krb5_keyblock_zero(&cache->key.keyblock);
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}
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cache->flags = 0;
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cache->mode = 0;
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cache->uid = -1;
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cache->gid = -1;
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cache->session = -1;
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kcm_zero_ccache_data_internal(context, cache);
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cache->tkt_life = 0;
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cache->renew_life = 0;
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cache->next = NULL;
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cache->refcnt = 0;
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HEIMDAL_MUTEX_unlock(&cache->mutex);
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HEIMDAL_MUTEX_destroy(&cache->mutex);
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}
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krb5_error_code
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kcm_ccache_destroy(krb5_context context, const char *name)
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{
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kcm_ccache *p, ccache;
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krb5_error_code ret;
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ret = KRB5_FCC_NOFILE;
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HEIMDAL_MUTEX_lock(&ccache_mutex);
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for (p = &ccache_head; *p != NULL; p = &(*p)->next) {
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if (((*p)->flags & KCM_FLAGS_VALID) == 0)
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continue;
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if (strcmp((*p)->name, name) == 0) {
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ret = 0;
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break;
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}
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}
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if (ret)
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goto out;
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if ((*p)->refcnt != 1) {
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ret = EAGAIN;
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goto out;
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}
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ccache = *p;
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*p = (*p)->next;
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kcm_free_ccache_data_internal(context, ccache);
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free(ccache);
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out:
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HEIMDAL_MUTEX_unlock(&ccache_mutex);
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return ret;
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}
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static krb5_error_code
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kcm_ccache_alloc(krb5_context context,
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const char *name,
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kcm_ccache *ccache)
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{
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kcm_ccache slot = NULL, p;
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krb5_error_code ret;
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int new_slot = 0;
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*ccache = NULL;
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/* First, check for duplicates */
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HEIMDAL_MUTEX_lock(&ccache_mutex);
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ret = 0;
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for (p = ccache_head; p != NULL; p = p->next) {
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if (p->flags & KCM_FLAGS_VALID) {
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if (strcmp(p->name, name) == 0) {
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ret = KRB5_CC_WRITE;
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break;
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}
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} else if (slot == NULL)
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slot = p;
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}
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if (ret)
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goto out;
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/*
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* Create an enpty slot for us.
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*/
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if (slot == NULL) {
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slot = (kcm_ccache_data *)malloc(sizeof(*slot));
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if (slot == NULL) {
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ret = KRB5_CC_NOMEM;
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goto out;
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}
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slot->next = ccache_head;
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HEIMDAL_MUTEX_init(&slot->mutex);
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new_slot = 1;
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}
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RAND_bytes(slot->uuid, sizeof(slot->uuid));
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slot->name = strdup(name);
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if (slot->name == NULL) {
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ret = KRB5_CC_NOMEM;
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goto out;
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}
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slot->refcnt = 1;
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slot->flags = KCM_FLAGS_VALID;
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slot->mode = S_IRUSR | S_IWUSR;
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slot->uid = -1;
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slot->gid = -1;
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slot->client = NULL;
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slot->server = NULL;
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slot->creds = NULL;
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slot->key.keytab = NULL;
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slot->tkt_life = 0;
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slot->renew_life = 0;
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if (new_slot)
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ccache_head = slot;
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*ccache = slot;
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HEIMDAL_MUTEX_unlock(&ccache_mutex);
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return 0;
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out:
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HEIMDAL_MUTEX_unlock(&ccache_mutex);
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if (new_slot && slot != NULL) {
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HEIMDAL_MUTEX_destroy(&slot->mutex);
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free(slot);
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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_ccache_remove_creds_internal(krb5_context context,
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kcm_ccache ccache)
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{
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struct kcm_creds *k;
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k = ccache->creds;
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while (k != NULL) {
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struct kcm_creds *old;
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krb5_free_cred_contents(context, &k->cred);
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old = k;
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k = k->next;
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free(old);
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}
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ccache->creds = NULL;
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return 0;
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}
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krb5_error_code
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kcm_ccache_remove_creds(krb5_context context,
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kcm_ccache ccache)
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{
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krb5_error_code ret;
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KCM_ASSERT_VALID(ccache);
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HEIMDAL_MUTEX_lock(&ccache->mutex);
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ret = kcm_ccache_remove_creds_internal(context, ccache);
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HEIMDAL_MUTEX_unlock(&ccache->mutex);
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return ret;
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}
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krb5_error_code
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kcm_zero_ccache_data_internal(krb5_context context,
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kcm_ccache_data *cache)
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{
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if (cache->client != NULL) {
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krb5_free_principal(context, cache->client);
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cache->client = NULL;
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}
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if (cache->server != NULL) {
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krb5_free_principal(context, cache->server);
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cache->server = NULL;
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}
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kcm_ccache_remove_creds_internal(context, cache);
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return 0;
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}
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krb5_error_code
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kcm_zero_ccache_data(krb5_context context,
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kcm_ccache cache)
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{
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krb5_error_code ret;
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KCM_ASSERT_VALID(cache);
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HEIMDAL_MUTEX_lock(&cache->mutex);
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ret = kcm_zero_ccache_data_internal(context, cache);
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HEIMDAL_MUTEX_unlock(&cache->mutex);
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return ret;
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}
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krb5_error_code
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kcm_retain_ccache(krb5_context context,
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kcm_ccache ccache)
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{
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KCM_ASSERT_VALID(ccache);
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HEIMDAL_MUTEX_lock(&ccache->mutex);
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ccache->refcnt++;
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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_release_ccache(krb5_context context, kcm_ccache c)
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{
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krb5_error_code ret = 0;
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KCM_ASSERT_VALID(c);
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HEIMDAL_MUTEX_lock(&c->mutex);
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if (c->refcnt == 1) {
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kcm_free_ccache_data_internal(context, c);
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free(c);
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} else {
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c->refcnt--;
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HEIMDAL_MUTEX_unlock(&c->mutex);
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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_ccache_gen_new(krb5_context context,
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pid_t pid,
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uid_t uid,
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gid_t gid,
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kcm_ccache *ccache)
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{
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krb5_error_code ret;
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char *name;
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name = kcm_ccache_nextid(pid, uid, gid);
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if (name == NULL) {
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return KRB5_CC_NOMEM;
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}
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ret = kcm_ccache_new(context, name, ccache);
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free(name);
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return ret;
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}
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krb5_error_code
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kcm_ccache_new(krb5_context context,
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const char *name,
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kcm_ccache *ccache)
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{
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krb5_error_code ret;
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ret = kcm_ccache_alloc(context, name, ccache);
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if (ret == 0) {
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/*
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* one reference is held by the linked list,
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* one by the caller
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*/
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kcm_retain_ccache(context, *ccache);
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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_ccache_destroy_if_empty(krb5_context context,
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kcm_ccache ccache)
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{
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krb5_error_code ret;
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KCM_ASSERT_VALID(ccache);
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if (ccache->creds == NULL) {
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ret = kcm_ccache_destroy(context, ccache->name);
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} else
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ret = 0;
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return ret;
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}
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krb5_error_code
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kcm_ccache_store_cred(krb5_context context,
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kcm_ccache ccache,
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krb5_creds *creds,
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int copy)
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{
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krb5_error_code ret;
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krb5_creds *tmp;
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KCM_ASSERT_VALID(ccache);
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HEIMDAL_MUTEX_lock(&ccache->mutex);
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ret = kcm_ccache_store_cred_internal(context, ccache, creds, copy, &tmp);
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HEIMDAL_MUTEX_unlock(&ccache->mutex);
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return ret;
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}
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struct kcm_creds *
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kcm_ccache_find_cred_uuid(krb5_context context,
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kcm_ccache ccache,
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kcmuuid_t uuid)
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{
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struct kcm_creds *c;
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for (c = ccache->creds; c != NULL; c = c->next)
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if (memcmp(c->uuid, uuid, sizeof(c->uuid)) == 0)
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return c;
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return NULL;
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}
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krb5_error_code
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kcm_ccache_store_cred_internal(krb5_context context,
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kcm_ccache ccache,
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krb5_creds *creds,
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int copy,
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krb5_creds **credp)
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{
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struct kcm_creds **c;
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krb5_error_code ret;
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for (c = &ccache->creds; *c != NULL; c = &(*c)->next)
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;
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*c = (struct kcm_creds *)calloc(1, sizeof(**c));
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if (*c == NULL)
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return KRB5_CC_NOMEM;
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RAND_bytes((*c)->uuid, sizeof((*c)->uuid));
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*credp = &(*c)->cred;
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if (copy) {
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ret = krb5_copy_creds_contents(context, creds, *credp);
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if (ret) {
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free(*c);
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*c = NULL;
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}
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} else {
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**credp = *creds;
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ret = 0;
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}
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return ret;
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}
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|
|
|
krb5_error_code
|
|
kcm_ccache_remove_cred_internal(krb5_context context,
|
|
kcm_ccache ccache,
|
|
krb5_flags whichfields,
|
|
const krb5_creds *mcreds)
|
|
{
|
|
krb5_error_code ret;
|
|
struct kcm_creds **c;
|
|
|
|
ret = KRB5_CC_NOTFOUND;
|
|
|
|
for (c = &ccache->creds; *c != NULL; c = &(*c)->next) {
|
|
if (krb5_compare_creds(context, whichfields, mcreds, &(*c)->cred)) {
|
|
struct kcm_creds *cred = *c;
|
|
|
|
*c = cred->next;
|
|
krb5_free_cred_contents(context, &cred->cred);
|
|
free(cred);
|
|
ret = 0;
|
|
if (*c == NULL)
|
|
break;
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
krb5_error_code
|
|
kcm_ccache_remove_cred(krb5_context context,
|
|
kcm_ccache ccache,
|
|
krb5_flags whichfields,
|
|
const krb5_creds *mcreds)
|
|
{
|
|
krb5_error_code ret;
|
|
|
|
KCM_ASSERT_VALID(ccache);
|
|
|
|
HEIMDAL_MUTEX_lock(&ccache->mutex);
|
|
ret = kcm_ccache_remove_cred_internal(context, ccache, whichfields, mcreds);
|
|
HEIMDAL_MUTEX_unlock(&ccache->mutex);
|
|
|
|
return ret;
|
|
}
|
|
|
|
krb5_error_code
|
|
kcm_ccache_retrieve_cred_internal(krb5_context context,
|
|
kcm_ccache ccache,
|
|
krb5_flags whichfields,
|
|
const krb5_creds *mcreds,
|
|
krb5_creds **creds)
|
|
{
|
|
krb5_boolean match;
|
|
struct kcm_creds *c;
|
|
krb5_error_code ret;
|
|
|
|
memset(creds, 0, sizeof(*creds));
|
|
|
|
ret = KRB5_CC_END;
|
|
|
|
match = FALSE;
|
|
for (c = ccache->creds; c != NULL; c = c->next) {
|
|
match = krb5_compare_creds(context, whichfields, mcreds, &c->cred);
|
|
if (match)
|
|
break;
|
|
}
|
|
|
|
if (match) {
|
|
ret = 0;
|
|
*creds = &c->cred;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
krb5_error_code
|
|
kcm_ccache_retrieve_cred(krb5_context context,
|
|
kcm_ccache ccache,
|
|
krb5_flags whichfields,
|
|
const krb5_creds *mcreds,
|
|
krb5_creds **credp)
|
|
{
|
|
krb5_error_code ret;
|
|
|
|
KCM_ASSERT_VALID(ccache);
|
|
|
|
HEIMDAL_MUTEX_lock(&ccache->mutex);
|
|
ret = kcm_ccache_retrieve_cred_internal(context, ccache,
|
|
whichfields, mcreds, credp);
|
|
HEIMDAL_MUTEX_unlock(&ccache->mutex);
|
|
|
|
return ret;
|
|
}
|
|
|
|
char *
|
|
kcm_ccache_first_name(kcm_client *client)
|
|
{
|
|
kcm_ccache p;
|
|
char *name = NULL;
|
|
|
|
HEIMDAL_MUTEX_lock(&ccache_mutex);
|
|
|
|
for (p = ccache_head; p != NULL; p = p->next) {
|
|
if (kcm_is_same_session(client, p->uid, p->session))
|
|
break;
|
|
}
|
|
if (p)
|
|
name = strdup(p->name);
|
|
HEIMDAL_MUTEX_unlock(&ccache_mutex);
|
|
return name;
|
|
}
|