mirror of https://gitee.com/openkylin/linux.git
140 lines
3.8 KiB
C
140 lines
3.8 KiB
C
/**
|
|
* AES ECB routines supporting the Power 7+ Nest Accelerators driver
|
|
*
|
|
* Copyright (C) 2011-2012 International Business Machines Inc.
|
|
*
|
|
* This program 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; version 2 only.
|
|
*
|
|
* 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 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., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*
|
|
* Author: Kent Yoder <yoder1@us.ibm.com>
|
|
*/
|
|
|
|
#include <crypto/aes.h>
|
|
#include <crypto/algapi.h>
|
|
#include <linux/module.h>
|
|
#include <linux/types.h>
|
|
#include <linux/crypto.h>
|
|
#include <asm/vio.h>
|
|
|
|
#include "nx_csbcpb.h"
|
|
#include "nx.h"
|
|
|
|
|
|
static int ecb_aes_nx_set_key(struct crypto_tfm *tfm,
|
|
const u8 *in_key,
|
|
unsigned int key_len)
|
|
{
|
|
struct nx_crypto_ctx *nx_ctx = crypto_tfm_ctx(tfm);
|
|
struct nx_csbcpb *csbcpb = (struct nx_csbcpb *)nx_ctx->csbcpb;
|
|
|
|
nx_ctx_init(nx_ctx, HCOP_FC_AES);
|
|
|
|
switch (key_len) {
|
|
case AES_KEYSIZE_128:
|
|
NX_CPB_SET_KEY_SIZE(csbcpb, NX_KS_AES_128);
|
|
nx_ctx->ap = &nx_ctx->props[NX_PROPS_AES_128];
|
|
break;
|
|
case AES_KEYSIZE_192:
|
|
NX_CPB_SET_KEY_SIZE(csbcpb, NX_KS_AES_192);
|
|
nx_ctx->ap = &nx_ctx->props[NX_PROPS_AES_192];
|
|
break;
|
|
case AES_KEYSIZE_256:
|
|
NX_CPB_SET_KEY_SIZE(csbcpb, NX_KS_AES_256);
|
|
nx_ctx->ap = &nx_ctx->props[NX_PROPS_AES_256];
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
csbcpb->cpb.hdr.mode = NX_MODE_AES_ECB;
|
|
memcpy(csbcpb->cpb.aes_ecb.key, in_key, key_len);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ecb_aes_nx_crypt(struct blkcipher_desc *desc,
|
|
struct scatterlist *dst,
|
|
struct scatterlist *src,
|
|
unsigned int nbytes,
|
|
int enc)
|
|
{
|
|
struct nx_crypto_ctx *nx_ctx = crypto_blkcipher_ctx(desc->tfm);
|
|
struct nx_csbcpb *csbcpb = nx_ctx->csbcpb;
|
|
int rc;
|
|
|
|
if (nbytes > nx_ctx->ap->databytelen)
|
|
return -EINVAL;
|
|
|
|
if (enc)
|
|
NX_CPB_FDM(csbcpb) |= NX_FDM_ENDE_ENCRYPT;
|
|
else
|
|
NX_CPB_FDM(csbcpb) &= ~NX_FDM_ENDE_ENCRYPT;
|
|
|
|
rc = nx_build_sg_lists(nx_ctx, desc, dst, src, nbytes, NULL);
|
|
if (rc)
|
|
goto out;
|
|
|
|
if (!nx_ctx->op.inlen || !nx_ctx->op.outlen) {
|
|
rc = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
rc = nx_hcall_sync(nx_ctx, &nx_ctx->op,
|
|
desc->flags & CRYPTO_TFM_REQ_MAY_SLEEP);
|
|
if (rc)
|
|
goto out;
|
|
|
|
atomic_inc(&(nx_ctx->stats->aes_ops));
|
|
atomic64_add(csbcpb->csb.processed_byte_count,
|
|
&(nx_ctx->stats->aes_bytes));
|
|
out:
|
|
return rc;
|
|
}
|
|
|
|
static int ecb_aes_nx_encrypt(struct blkcipher_desc *desc,
|
|
struct scatterlist *dst,
|
|
struct scatterlist *src,
|
|
unsigned int nbytes)
|
|
{
|
|
return ecb_aes_nx_crypt(desc, dst, src, nbytes, 1);
|
|
}
|
|
|
|
static int ecb_aes_nx_decrypt(struct blkcipher_desc *desc,
|
|
struct scatterlist *dst,
|
|
struct scatterlist *src,
|
|
unsigned int nbytes)
|
|
{
|
|
return ecb_aes_nx_crypt(desc, dst, src, nbytes, 0);
|
|
}
|
|
|
|
struct crypto_alg nx_ecb_aes_alg = {
|
|
.cra_name = "ecb(aes)",
|
|
.cra_driver_name = "ecb-aes-nx",
|
|
.cra_priority = 300,
|
|
.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
|
|
.cra_blocksize = AES_BLOCK_SIZE,
|
|
.cra_alignmask = 0xf,
|
|
.cra_ctxsize = sizeof(struct nx_crypto_ctx),
|
|
.cra_type = &crypto_blkcipher_type,
|
|
.cra_module = THIS_MODULE,
|
|
.cra_init = nx_crypto_ctx_aes_ecb_init,
|
|
.cra_exit = nx_crypto_ctx_exit,
|
|
.cra_blkcipher = {
|
|
.min_keysize = AES_MIN_KEY_SIZE,
|
|
.max_keysize = AES_MAX_KEY_SIZE,
|
|
.setkey = ecb_aes_nx_set_key,
|
|
.encrypt = ecb_aes_nx_encrypt,
|
|
.decrypt = ecb_aes_nx_decrypt,
|
|
}
|
|
};
|