150 lines
4.1 KiB
C
150 lines
4.1 KiB
C
/*
|
|
* CDDL HEADER START
|
|
*
|
|
* The contents of this file are subject to the terms of the
|
|
* Common Development and Distribution License (the "License").
|
|
* You may not use this file except in compliance with the License.
|
|
*
|
|
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
|
|
* or http://www.opensolaris.org/os/licensing.
|
|
* See the License for the specific language governing permissions
|
|
* and limitations under the License.
|
|
*
|
|
* When distributing Covered Code, include this CDDL HEADER in each
|
|
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
|
|
* If applicable, add the following below this CDDL HEADER, with the
|
|
* fields enclosed by brackets "[]" replaced with your own identifying
|
|
* information: Portions Copyright [yyyy] [name of copyright owner]
|
|
*
|
|
* CDDL HEADER END
|
|
*/
|
|
/*
|
|
* Copyright 2007 Sun Microsystems, Inc. All rights reserved.
|
|
* Use is subject to license terms.
|
|
*/
|
|
|
|
#include <sys/zfs_context.h>
|
|
#include <sys/crypto/common.h>
|
|
#include <sys/crypto/impl.h>
|
|
#include <sys/crypto/api.h>
|
|
#include <sys/crypto/spi.h>
|
|
#include <sys/crypto/sched_impl.h>
|
|
|
|
/*
|
|
* Crypto contexts manipulation routines
|
|
*/
|
|
|
|
/*
|
|
* crypto_create_ctx_template()
|
|
*
|
|
* Arguments:
|
|
*
|
|
* mech: crypto_mechanism_t pointer.
|
|
* mech_type is a valid value previously returned by
|
|
* crypto_mech2id();
|
|
* When the mech's parameter is not NULL, its definition depends
|
|
* on the standard definition of the mechanism.
|
|
* key: pointer to a crypto_key_t structure.
|
|
* ptmpl: a storage for the opaque crypto_ctx_template_t, allocated and
|
|
* initialized by the software provider this routine is
|
|
* dispatched to.
|
|
*
|
|
* Description:
|
|
* Redirects the call to the software provider of the specified
|
|
* mechanism. That provider will allocate and pre-compute/pre-expand
|
|
* the context template, reusable by later calls to crypto_xxx_init().
|
|
* The size and address of that provider context template are stored
|
|
* in an internal structure, kcf_ctx_template_t. The address of that
|
|
* structure is given back to the caller in *ptmpl.
|
|
*
|
|
* Context:
|
|
* Process or interrupt.
|
|
*
|
|
* Returns:
|
|
* CRYPTO_SUCCESS when the context template is successfully created.
|
|
* CRYPTO_HOST_MEMORY: mem alloc failure
|
|
* CRYPTO_ARGUMENTS_BAD: NULL storage for the ctx template.
|
|
* RYPTO_MECHANISM_INVALID: invalid mechanism 'mech'.
|
|
*/
|
|
int
|
|
crypto_create_ctx_template(crypto_mechanism_t *mech, crypto_key_t *key,
|
|
crypto_ctx_template_t *ptmpl)
|
|
{
|
|
int error;
|
|
kcf_mech_entry_t *me;
|
|
kcf_provider_desc_t *pd;
|
|
kcf_ctx_template_t *ctx_tmpl;
|
|
crypto_mechanism_t prov_mech;
|
|
|
|
/* A few args validation */
|
|
|
|
if (ptmpl == NULL)
|
|
return (CRYPTO_ARGUMENTS_BAD);
|
|
|
|
if (mech == NULL)
|
|
return (CRYPTO_MECHANISM_INVALID);
|
|
|
|
error = kcf_get_sw_prov(mech->cm_type, &pd, &me, B_TRUE);
|
|
if (error != CRYPTO_SUCCESS)
|
|
return (error);
|
|
|
|
if ((ctx_tmpl = (kcf_ctx_template_t *)kmem_alloc(
|
|
sizeof (kcf_ctx_template_t), KM_SLEEP)) == NULL) {
|
|
KCF_PROV_REFRELE(pd);
|
|
return (CRYPTO_HOST_MEMORY);
|
|
}
|
|
|
|
/* Pass a mechtype that the provider understands */
|
|
prov_mech.cm_type = KCF_TO_PROV_MECHNUM(pd, mech->cm_type);
|
|
prov_mech.cm_param = mech->cm_param;
|
|
prov_mech.cm_param_len = mech->cm_param_len;
|
|
|
|
error = KCF_PROV_CREATE_CTX_TEMPLATE(pd, &prov_mech, key,
|
|
&(ctx_tmpl->ct_prov_tmpl), &(ctx_tmpl->ct_size));
|
|
|
|
if (error == CRYPTO_SUCCESS) {
|
|
*ptmpl = ctx_tmpl;
|
|
} else {
|
|
kmem_free(ctx_tmpl, sizeof (kcf_ctx_template_t));
|
|
}
|
|
KCF_PROV_REFRELE(pd);
|
|
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* crypto_destroy_ctx_template()
|
|
*
|
|
* Arguments:
|
|
*
|
|
* tmpl: an opaque crypto_ctx_template_t previously created by
|
|
* crypto_create_ctx_template()
|
|
*
|
|
* Description:
|
|
* Frees the embedded crypto_spi_ctx_template_t, then the
|
|
* kcf_ctx_template_t.
|
|
*
|
|
* Context:
|
|
* Process or interrupt.
|
|
*
|
|
*/
|
|
void
|
|
crypto_destroy_ctx_template(crypto_ctx_template_t tmpl)
|
|
{
|
|
kcf_ctx_template_t *ctx_tmpl = (kcf_ctx_template_t *)tmpl;
|
|
|
|
if (ctx_tmpl == NULL)
|
|
return;
|
|
|
|
ASSERT(ctx_tmpl->ct_prov_tmpl != NULL);
|
|
|
|
memset(ctx_tmpl->ct_prov_tmpl, 0, ctx_tmpl->ct_size);
|
|
kmem_free(ctx_tmpl->ct_prov_tmpl, ctx_tmpl->ct_size);
|
|
kmem_free(ctx_tmpl, sizeof (kcf_ctx_template_t));
|
|
}
|
|
|
|
#if defined(_KERNEL)
|
|
EXPORT_SYMBOL(crypto_create_ctx_template);
|
|
EXPORT_SYMBOL(crypto_destroy_ctx_template);
|
|
#endif
|