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