Adding upstream version 2:4.17.12+dfsg.upstream/2%4.17.12+dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 678 insertions, 0 deletions

diff --git a/third_party/heimdal/kcm/cache.c b/third_party/heimdal/kcm/cache.c
new file mode 100644
index 0000000..b118127
--- /dev/null
+++ b/third_party/heimdal/kcm/cache.c
@@ -0,0 +1,678 @@
+/*
+ * 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)
+	    (void) krb5_unparse_name(context, p->client, &cpn);
+	if (p->server != NULL)
+	    (void) 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);
+
+        free(cpn);
+        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;
+}