This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / crypto / signature / ksign-keyring.c

diff --git a/crypto/signature/ksign-keyring.c b/crypto/signature/ksign-keyring.c
new file mode 100644 (file)
index 0000000..a1bbd85
--- /dev/null
+++ b/crypto/signature/ksign-keyring.c
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+/* ksign-keyring.c: public key cache
+ *
+ * Copyright (C) 2001 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This file is derived from part of GnuPG.
+ *
+ * GnuPG is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * GnuPG is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+ */
+
+#include <linux/rwsem.h>
+#include "local.h"
+
+static LIST_HEAD(keyring);
+static DECLARE_RWSEM(keyring_sem);
+
+static int add_keyblock_key(struct ksign_public_key *pk, void *data)
+{
+       printk("- Added public key %X%X\n", pk->keyid[0], pk->keyid[1]);
+
+       if (pk->expiredate && pk->expiredate < xtime.tv_sec)
+               printk("  - public key has expired\n");
+
+       if (pk->timestamp > xtime.tv_sec )
+               printk("  - key was been created %lu seconds in future\n",
+                      pk->timestamp - xtime.tv_sec);
+
+       atomic_inc(&pk->count);
+
+       down_write(&keyring_sem);
+       list_add_tail(&pk->link, &keyring);
+       up_write(&keyring_sem);
+
+       return 0;
+}
+
+static int add_keyblock_uid(struct ksign_user_id *uid, void *data)
+{
+       printk("- User ID: %s\n", uid->name);
+       return 1;
+}
+
+/*****************************************************************************/
+/*
+ *
+ */
+int ksign_load_keyring_from_buffer(const void *buffer, size_t size)
+{
+    printk("Loading keyring\n");
+
+    return ksign_parse_packets((const uint8_t *) buffer,
+                              size,
+                              NULL,
+                              add_keyblock_key,
+                              add_keyblock_uid,
+                              NULL);
+} /* end ksign_load_keyring_from_buffer() */
+
+/*****************************************************************************/
+/*
+ *
+ */
+struct ksign_public_key *ksign_get_public_key(const uint32_t *keyid)
+{
+       struct ksign_public_key *pk;
+
+       down_read(&keyring_sem);
+
+       list_for_each_entry(pk, &keyring, link) {
+               if (memcmp(pk->keyid, keyid, sizeof(pk->keyid)) == 0) {
+                       atomic_inc(&pk->count);
+                       goto found;
+               }
+       }
+
+ found:
+       up_read(&keyring_sem);
+
+       return pk;
+} /* end ksign_get_public_key() */
+
+/*****************************************************************************/
+/*
+ * clear the public key keyring
+ */
+void ksign_clear_keyring(void)
+{
+       struct ksign_public_key *pk;
+
+       down_write(&keyring_sem);
+
+       while (!list_empty(&keyring)) {
+               pk = list_entry(keyring.next, struct ksign_public_key, link);
+               list_del(&pk->link);
+
+               ksign_put_public_key(pk);
+       }
+
+       up_write(&keyring_sem);
+} /* end ksign_clear_keyring() */