/*
* cryptsetup volume key implementation
*
- * Copyright (C) 2004-2006, Clemens Fruhwirth <clemens@endorphin.org>
- * Copyright (C) 2010-2011, Red Hat, Inc. All rights reserved.
+ * Copyright (C) 2004-2006 Clemens Fruhwirth <clemens@endorphin.org>
+ * Copyright (C) 2010-2020 Red Hat, Inc. All rights reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
- * version 2 as published by the Free Software Foundation.
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
*/
#include <string.h>
+#include <stdint.h>
#include <stdlib.h>
+#include <errno.h>
#include "internal.h"
-struct volume_key *crypt_alloc_volume_key(unsigned keylength, const char *key)
+struct volume_key *crypt_alloc_volume_key(size_t keylength, const char *key)
{
- struct volume_key *vk = malloc(sizeof(*vk) + keylength);
+ struct volume_key *vk;
+
+ if (keylength > (SIZE_MAX - sizeof(*vk)))
+ return NULL;
+ vk = malloc(sizeof(*vk) + keylength);
if (!vk)
return NULL;
+ vk->key_description = NULL;
vk->keylength = keylength;
- if (key)
- memcpy(&vk->key, key, keylength);
- else
- memset(&vk->key, 0, keylength);
+ vk->id = -1;
+ vk->next = NULL;
+
+ /* keylength 0 is valid => no key */
+ if (vk->keylength) {
+ if (key)
+ memcpy(&vk->key, key, keylength);
+ else
+ crypt_safe_memzero(&vk->key, keylength);
+ }
+
+ return vk;
+}
+
+int crypt_volume_key_set_description(struct volume_key *vk, const char *key_description)
+{
+ if (!vk)
+ return -EINVAL;
+
+ free(CONST_CAST(void*)vk->key_description);
+ vk->key_description = NULL;
+ if (key_description && !(vk->key_description = strdup(key_description)))
+ return -ENOMEM;
+
+ return 0;
+}
+
+void crypt_volume_key_set_id(struct volume_key *vk, int id)
+{
+ if (vk && id >= 0)
+ vk->id = id;
+}
+
+int crypt_volume_key_get_id(const struct volume_key *vk)
+{
+ return vk ? vk->id : -1;
+}
+
+struct volume_key *crypt_volume_key_by_id(struct volume_key *vks, int id)
+{
+ struct volume_key *vk = vks;
+
+ if (id < 0)
+ return NULL;
+
+ while (vk && vk->id != id)
+ vk = vk->next;
return vk;
}
+void crypt_volume_key_add_next(struct volume_key **vks, struct volume_key *vk)
+{
+ struct volume_key *tmp;
+
+ if (!vks)
+ return;
+
+ if (!*vks) {
+ *vks = vk;
+ return;
+ }
+
+ tmp = *vks;
+
+ while (tmp->next)
+ tmp = tmp->next;
+
+ tmp->next = vk;
+}
+
+struct volume_key *crypt_volume_key_next(struct volume_key *vk)
+{
+ return vk ? vk->next : NULL;
+}
+
void crypt_free_volume_key(struct volume_key *vk)
{
- if (vk) {
- memset(vk->key, 0, vk->keylength);
+ struct volume_key *vk_next;
+
+ while (vk) {
+ crypt_safe_memzero(vk->key, vk->keylength);
vk->keylength = 0;
+ free(CONST_CAST(void*)vk->key_description);
+ vk_next = vk->next;
free(vk);
+ vk = vk_next;
}
}
-struct volume_key *crypt_generate_volume_key(struct crypt_device *cd, unsigned keylength)
+struct volume_key *crypt_generate_volume_key(struct crypt_device *cd, size_t keylength)
{
int r;
struct volume_key *vk;