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/*
* gnome-keyring
*
* Copyright (C) 2011 Collabora Ltd.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 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
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser 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.
*
* Author: Stef Walter <stefw@collabora.co.uk>
*/
#include "config.h"
#include "pkcs11/pkcs11.h"
#include "pkcs11/pkcs11i.h"
#include "gkm-attributes.h"
#include "gkm-generic-key.h"
#include "gkm-session.h"
#include "gkm-transaction.h"
#include "gkm-util.h"
#include "egg/egg-secure-memory.h"
struct _GkmGenericKey {
GkmSecretKey parent;
gpointer value;
gsize n_value;
};
G_DEFINE_TYPE (GkmGenericKey, gkm_generic_key, GKM_TYPE_SECRET_KEY);
static const CK_MECHANISM_TYPE GKM_GENERIC_MECHANISMS[] = {
CKM_G_HKDF_SHA256_DERIVE
};
EGG_SECURE_DECLARE (generic_key);
/* -----------------------------------------------------------------------------
* INTERNAL
*/
static CK_RV
attribute_set_check_value (GkmGenericKey *self, CK_ATTRIBUTE *attr)
{
guchar buffer[20];
g_assert (GKM_IS_GENERIC_KEY (self));
g_assert (attr);
/* Just asking for the length */
if (!attr->pValue) {
attr->ulValueLen = 3;
return CKR_OK;
}
/* Just the a sha1 of the value */
gcry_md_hash_buffer (GCRY_MD_SHA1, buffer, self->value, self->n_value);
/* Use the first three bytes */
return gkm_attribute_set_data (attr, buffer, 3);
}
static GkmObject*
factory_create_generic_key (GkmSession *session, GkmTransaction *transaction,
CK_ATTRIBUTE_PTR attrs, CK_ULONG n_attrs)
{
GkmGenericKey *key;
GkmManager *manager;
CK_ATTRIBUTE_PTR value;
value = gkm_attributes_find (attrs, n_attrs, CKA_VALUE);
if (value == NULL) {
gkm_transaction_fail (transaction, CKR_TEMPLATE_INCOMPLETE);
return NULL;
}
if (gkm_attributes_find (attrs, n_attrs, CKA_VALUE_LEN)) {
gkm_transaction_fail (transaction, CKR_TEMPLATE_INCONSISTENT);
return NULL;
}
manager = gkm_manager_for_template (attrs, n_attrs, session);
key = g_object_new (GKM_TYPE_GENERIC_KEY,
"module", gkm_session_get_module (session),
"manager", manager,
NULL);
key->value = egg_secure_alloc (value->ulValueLen);
key->n_value = value->ulValueLen;
memcpy (key->value, value->pValue, key->n_value);
gkm_attribute_consume (value);
gkm_session_complete_object_creation (session, transaction, GKM_OBJECT (key),
TRUE, attrs, n_attrs);
return GKM_OBJECT (key);
}
/* -----------------------------------------------------------------------------
* OBJECT
*/
static CK_RV
gkm_generic_key_get_attribute (GkmObject *base, GkmSession *session, CK_ATTRIBUTE *attr)
{
GkmGenericKey *self = GKM_GENERIC_KEY (base);
switch (attr->type)
{
case CKA_KEY_TYPE:
return gkm_attribute_set_ulong (attr, CKK_GENERIC_SECRET);
case CKA_DERIVE:
return gkm_attribute_set_bool (attr, CK_TRUE);
case CKA_UNWRAP:
case CKA_WRAP:
return gkm_attribute_set_bool (attr, CK_FALSE);
case CKA_VALUE:
return gkm_attribute_set_data (attr, self->value, self->n_value);
case CKA_VALUE_LEN:
return gkm_attribute_set_ulong (attr, self->n_value);
case CKA_CHECK_VALUE:
return attribute_set_check_value (self, attr);
case CKA_ALLOWED_MECHANISMS:
return gkm_attribute_set_data (attr, (CK_VOID_PTR)GKM_GENERIC_MECHANISMS,
sizeof (GKM_GENERIC_MECHANISMS));
};
return GKM_OBJECT_CLASS (gkm_generic_key_parent_class)->get_attribute (base, session, attr);
}
static gconstpointer
gkm_generic_key_get_key_value (GkmSecretKey *key, gsize *n_value)
{
GkmGenericKey *self = GKM_GENERIC_KEY (key);
*n_value = self->n_value;
return self->value;
}
static void
gkm_generic_key_init (GkmGenericKey *self)
{
}
static void
gkm_generic_key_finalize (GObject *obj)
{
GkmGenericKey *self = GKM_GENERIC_KEY (obj);
if (self->value) {
egg_secure_clear (self->value, self->n_value);
egg_secure_free (self->value);
self->value = NULL;
self->n_value = 0;
}
G_OBJECT_CLASS (gkm_generic_key_parent_class)->finalize (obj);
}
static void
gkm_generic_key_class_init (GkmGenericKeyClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GkmObjectClass *gkm_class = GKM_OBJECT_CLASS (klass);
GkmSecretKeyClass *key_class = GKM_SECRET_KEY_CLASS (klass);
gkm_generic_key_parent_class = g_type_class_peek_parent (klass);
gobject_class->finalize = gkm_generic_key_finalize;
gkm_class->get_attribute = gkm_generic_key_get_attribute;
key_class->get_key_value = gkm_generic_key_get_key_value;
}
/* -----------------------------------------------------------------------------
* PUBLIC
*/
GkmFactory*
gkm_generic_key_get_factory (void)
{
static CK_OBJECT_CLASS klass = CKO_SECRET_KEY;
static CK_KEY_TYPE type = CKK_GENERIC_SECRET;
static CK_ATTRIBUTE attributes[] = {
{ CKA_CLASS, &klass, sizeof (klass) },
{ CKA_KEY_TYPE, &type, sizeof (type) }
};
static GkmFactory factory = {
attributes,
G_N_ELEMENTS (attributes),
factory_create_generic_key
};
return &factory;
}
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