432 lines
11 KiB
C
432 lines
11 KiB
C
|
/*
|
||
|
|
* Copyright (c) 2010-2014, The Linux Foundation. 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 and
|
||
|
|
* only version 2 as published by the Free Software Foundation.
|
||
|
|
*
|
||
|
|
* 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.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/device.h>
|
||
|
|
#include <linux/interrupt.h>
|
||
|
|
#include <linux/types.h>
|
||
|
|
#include <crypto/aes.h>
|
||
|
|
#include <crypto/algapi.h>
|
||
|
|
#include <crypto/des.h>
|
||
|
|
|
||
|
|
#include "cipher.h"
|
||
|
|
|
||
|
|
static LIST_HEAD(ablkcipher_algs);
|
||
|
|
|
||
|
|
static void qce_ablkcipher_done(void *data)
|
||
|
|
{
|
||
|
|
struct crypto_async_request *async_req = data;
|
||
|
|
struct ablkcipher_request *req = ablkcipher_request_cast(async_req);
|
||
|
|
struct qce_cipher_reqctx *rctx = ablkcipher_request_ctx(req);
|
||
|
|
struct qce_alg_template *tmpl = to_cipher_tmpl(async_req->tfm);
|
||
|
|
struct qce_device *qce = tmpl->qce;
|
||
|
|
enum dma_data_direction dir_src, dir_dst;
|
||
|
|
u32 status;
|
||
|
|
int error;
|
||
|
|
bool diff_dst;
|
||
|
|
|
||
|
|
diff_dst = (req->src != req->dst) ? true : false;
|
||
|
|
dir_src = diff_dst ? DMA_TO_DEVICE : DMA_BIDIRECTIONAL;
|
||
|
|
dir_dst = diff_dst ? DMA_FROM_DEVICE : DMA_BIDIRECTIONAL;
|
||
|
|
|
||
|
|
error = qce_dma_terminate_all(&qce->dma);
|
||
|
|
if (error)
|
||
|
|
dev_dbg(qce->dev, "ablkcipher dma termination error (%d)\n",
|
||
|
|
error);
|
||
|
|
|
||
|
|
if (diff_dst)
|
||
|
|
qce_unmapsg(qce->dev, rctx->src_sg, rctx->src_nents, dir_src,
|
||
|
|
rctx->dst_chained);
|
||
|
|
qce_unmapsg(qce->dev, rctx->dst_sg, rctx->dst_nents, dir_dst,
|
||
|
|
rctx->dst_chained);
|
||
|
|
|
||
|
|
sg_free_table(&rctx->dst_tbl);
|
||
|
|
|
||
|
|
error = qce_check_status(qce, &status);
|
||
|
|
if (error < 0)
|
||
|
|
dev_dbg(qce->dev, "ablkcipher operation error (%x)\n", status);
|
||
|
|
|
||
|
|
qce->async_req_done(tmpl->qce, error);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int
|
||
|
|
qce_ablkcipher_async_req_handle(struct crypto_async_request *async_req)
|
||
|
|
{
|
||
|
|
struct ablkcipher_request *req = ablkcipher_request_cast(async_req);
|
||
|
|
struct qce_cipher_reqctx *rctx = ablkcipher_request_ctx(req);
|
||
|
|
struct crypto_ablkcipher *ablkcipher = crypto_ablkcipher_reqtfm(req);
|
||
|
|
struct qce_alg_template *tmpl = to_cipher_tmpl(async_req->tfm);
|
||
|
|
struct qce_device *qce = tmpl->qce;
|
||
|
|
enum dma_data_direction dir_src, dir_dst;
|
||
|
|
struct scatterlist *sg;
|
||
|
|
bool diff_dst;
|
||
|
|
gfp_t gfp;
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
rctx->iv = req->info;
|
||
|
|
rctx->ivsize = crypto_ablkcipher_ivsize(ablkcipher);
|
||
|
|
rctx->cryptlen = req->nbytes;
|
||
|
|
|
||
|
|
diff_dst = (req->src != req->dst) ? true : false;
|
||
|
|
dir_src = diff_dst ? DMA_TO_DEVICE : DMA_BIDIRECTIONAL;
|
||
|
|
dir_dst = diff_dst ? DMA_FROM_DEVICE : DMA_BIDIRECTIONAL;
|
||
|
|
|
||
|
|
rctx->src_nents = qce_countsg(req->src, req->nbytes,
|
||
|
|
&rctx->src_chained);
|
||
|
|
if (diff_dst) {
|
||
|
|
rctx->dst_nents = qce_countsg(req->dst, req->nbytes,
|
||
|
|
&rctx->dst_chained);
|
||
|
|
} else {
|
||
|
|
rctx->dst_nents = rctx->src_nents;
|
||
|
|
rctx->dst_chained = rctx->src_chained;
|
||
|
|
}
|
||
|
|
|
||
|
|
rctx->dst_nents += 1;
|
||
|
|
|
||
|
|
gfp = (req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP) ?
|
||
|
|
GFP_KERNEL : GFP_ATOMIC;
|
||
|
|
|
||
|
|
ret = sg_alloc_table(&rctx->dst_tbl, rctx->dst_nents, gfp);
|
||
|
|
if (ret)
|
||
|
|
return ret;
|
||
|
|
|
||
|
|
sg_init_one(&rctx->result_sg, qce->dma.result_buf, QCE_RESULT_BUF_SZ);
|
||
|
|
|
||
|
|
sg = qce_sgtable_add(&rctx->dst_tbl, req->dst);
|
||
|
|
if (IS_ERR(sg)) {
|
||
|
|
ret = PTR_ERR(sg);
|
||
|
|
goto error_free;
|
||
|
|
}
|
||
|
|
|
||
|
|
sg = qce_sgtable_add(&rctx->dst_tbl, &rctx->result_sg);
|
||
|
|
if (IS_ERR(sg)) {
|
||
|
|
ret = PTR_ERR(sg);
|
||
|
|
goto error_free;
|
||
|
|
}
|
||
|
|
|
||
|
|
sg_mark_end(sg);
|
||
|
|
rctx->dst_sg = rctx->dst_tbl.sgl;
|
||
|
|
|
||
|
|
ret = qce_mapsg(qce->dev, rctx->dst_sg, rctx->dst_nents, dir_dst,
|
||
|
|
rctx->dst_chained);
|
||
|
|
if (ret < 0)
|
||
|
|
goto error_free;
|
||
|
|
|
||
|
|
if (diff_dst) {
|
||
|
|
ret = qce_mapsg(qce->dev, req->src, rctx->src_nents, dir_src,
|
||
|
|
rctx->src_chained);
|
||
|
|
if (ret < 0)
|
||
|
|
goto error_unmap_dst;
|
||
|
|
rctx->src_sg = req->src;
|
||
|
|
} else {
|
||
|
|
rctx->src_sg = rctx->dst_sg;
|
||
|
|
}
|
||
|
|
|
||
|
|
ret = qce_dma_prep_sgs(&qce->dma, rctx->src_sg, rctx->src_nents,
|
||
|
|
rctx->dst_sg, rctx->dst_nents,
|
||
|
|
qce_ablkcipher_done, async_req);
|
||
|
|
if (ret)
|
||
|
|
goto error_unmap_src;
|
||
|
|
|
||
|
|
qce_dma_issue_pending(&qce->dma);
|
||
|
|
|
||
|
|
ret = qce_start(async_req, tmpl->crypto_alg_type, req->nbytes, 0);
|
||
|
|
if (ret)
|
||
|
|
goto error_terminate;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
error_terminate:
|
||
|
|
qce_dma_terminate_all(&qce->dma);
|
||
|
|
error_unmap_src:
|
||
|
|
if (diff_dst)
|
||
|
|
qce_unmapsg(qce->dev, req->src, rctx->src_nents, dir_src,
|
||
|
|
rctx->src_chained);
|
||
|
|
error_unmap_dst:
|
||
|
|
qce_unmapsg(qce->dev, rctx->dst_sg, rctx->dst_nents, dir_dst,
|
||
|
|
rctx->dst_chained);
|
||
|
|
error_free:
|
||
|
|
sg_free_table(&rctx->dst_tbl);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int qce_ablkcipher_setkey(struct crypto_ablkcipher *ablk, const u8 *key,
|
||
|
|
unsigned int keylen)
|
||
|
|
{
|
||
|
|
struct crypto_tfm *tfm = crypto_ablkcipher_tfm(ablk);
|
||
|
|
struct qce_cipher_ctx *ctx = crypto_tfm_ctx(tfm);
|
||
|
|
unsigned long flags = to_cipher_tmpl(tfm)->alg_flags;
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
if (!key || !keylen)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
if (IS_AES(flags)) {
|
||
|
|
switch (keylen) {
|
||
|
|
case AES_KEYSIZE_128:
|
||
|
|
case AES_KEYSIZE_256:
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
goto fallback;
|
||
|
|
}
|
||
|
|
} else if (IS_DES(flags)) {
|
||
|
|
u32 tmp[DES_EXPKEY_WORDS];
|
||
|
|
|
||
|
|
ret = des_ekey(tmp, key);
|
||
|
|
if (!ret && crypto_ablkcipher_get_flags(ablk) &
|
||
|
|
CRYPTO_TFM_REQ_WEAK_KEY)
|
||
|
|
goto weakkey;
|
||
|
|
}
|
||
|
|
|
||
|
|
ctx->enc_keylen = keylen;
|
||
|
|
memcpy(ctx->enc_key, key, keylen);
|
||
|
|
return 0;
|
||
|
|
fallback:
|
||
|
|
ret = crypto_ablkcipher_setkey(ctx->fallback, key, keylen);
|
||
|
|
if (!ret)
|
||
|
|
ctx->enc_keylen = keylen;
|
||
|
|
return ret;
|
||
|
|
weakkey:
|
||
|
|
crypto_ablkcipher_set_flags(ablk, CRYPTO_TFM_RES_WEAK_KEY);
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int qce_ablkcipher_crypt(struct ablkcipher_request *req, int encrypt)
|
||
|
|
{
|
||
|
|
struct crypto_tfm *tfm =
|
||
|
|
crypto_ablkcipher_tfm(crypto_ablkcipher_reqtfm(req));
|
||
|
|
struct qce_cipher_ctx *ctx = crypto_tfm_ctx(tfm);
|
||
|
|
struct qce_cipher_reqctx *rctx = ablkcipher_request_ctx(req);
|
||
|
|
struct qce_alg_template *tmpl = to_cipher_tmpl(tfm);
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
rctx->flags = tmpl->alg_flags;
|
||
|
|
rctx->flags |= encrypt ? QCE_ENCRYPT : QCE_DECRYPT;
|
||
|
|
|
||
|
|
if (IS_AES(rctx->flags) && ctx->enc_keylen != AES_KEYSIZE_128 &&
|
||
|
|
ctx->enc_keylen != AES_KEYSIZE_256) {
|
||
|
|
ablkcipher_request_set_tfm(req, ctx->fallback);
|
||
|
|
ret = encrypt ? crypto_ablkcipher_encrypt(req) :
|
||
|
|
crypto_ablkcipher_decrypt(req);
|
||
|
|
ablkcipher_request_set_tfm(req, __crypto_ablkcipher_cast(tfm));
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
return tmpl->qce->async_req_enqueue(tmpl->qce, &req->base);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int qce_ablkcipher_encrypt(struct ablkcipher_request *req)
|
||
|
|
{
|
||
|
|
return qce_ablkcipher_crypt(req, 1);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int qce_ablkcipher_decrypt(struct ablkcipher_request *req)
|
||
|
|
{
|
||
|
|
return qce_ablkcipher_crypt(req, 0);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int qce_ablkcipher_init(struct crypto_tfm *tfm)
|
||
|
|
{
|
||
|
|
struct qce_cipher_ctx *ctx = crypto_tfm_ctx(tfm);
|
||
|
|
|
||
|
|
memset(ctx, 0, sizeof(*ctx));
|
||
|
|
tfm->crt_ablkcipher.reqsize = sizeof(struct qce_cipher_reqctx);
|
||
|
|
|
||
|
|
ctx->fallback = crypto_alloc_ablkcipher(crypto_tfm_alg_name(tfm),
|
||
|
|
CRYPTO_ALG_TYPE_ABLKCIPHER,
|
||
|
|
CRYPTO_ALG_ASYNC |
|
||
|
|
CRYPTO_ALG_NEED_FALLBACK);
|
||
|
|
if (IS_ERR(ctx->fallback))
|
||
|
|
return PTR_ERR(ctx->fallback);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void qce_ablkcipher_exit(struct crypto_tfm *tfm)
|
||
|
|
{
|
||
|
|
struct qce_cipher_ctx *ctx = crypto_tfm_ctx(tfm);
|
||
|
|
|
||
|
|
crypto_free_ablkcipher(ctx->fallback);
|
||
|
|
}
|
||
|
|
|
||
|
|
struct qce_ablkcipher_def {
|
||
|
|
unsigned long flags;
|
||
|
|
const char *name;
|
||
|
|
const char *drv_name;
|
||
|
|
unsigned int blocksize;
|
||
|
|
unsigned int ivsize;
|
||
|
|
unsigned int min_keysize;
|
||
|
|
unsigned int max_keysize;
|
||
|
|
};
|
||
|
|
|
||
|
|
static const struct qce_ablkcipher_def ablkcipher_def[] = {
|
||
|
|
{
|
||
|
|
.flags = QCE_ALG_AES | QCE_MODE_ECB,
|
||
|
|
.name = "ecb(aes)",
|
||
|
|
.drv_name = "ecb-aes-qce",
|
||
|
|
.blocksize = AES_BLOCK_SIZE,
|
||
|
|
.ivsize = AES_BLOCK_SIZE,
|
||
|
|
.min_keysize = AES_MIN_KEY_SIZE,
|
||
|
|
.max_keysize = AES_MAX_KEY_SIZE,
|
||
|
|
},
|
||
|
|
{
|
||
|
|
.flags = QCE_ALG_AES | QCE_MODE_CBC,
|
||
|
|
.name = "cbc(aes)",
|
||
|
|
.drv_name = "cbc-aes-qce",
|
||
|
|
.blocksize = AES_BLOCK_SIZE,
|
||
|
|
.ivsize = AES_BLOCK_SIZE,
|
||
|
|
.min_keysize = AES_MIN_KEY_SIZE,
|
||
|
|
.max_keysize = AES_MAX_KEY_SIZE,
|
||
|
|
},
|
||
|
|
{
|
||
|
|
.flags = QCE_ALG_AES | QCE_MODE_CTR,
|
||
|
|
.name = "ctr(aes)",
|
||
|
|
.drv_name = "ctr-aes-qce",
|
||
|
|
.blocksize = AES_BLOCK_SIZE,
|
||
|
|
.ivsize = AES_BLOCK_SIZE,
|
||
|
|
.min_keysize = AES_MIN_KEY_SIZE,
|
||
|
|
.max_keysize = AES_MAX_KEY_SIZE,
|
||
|
|
},
|
||
|
|
{
|
||
|
|
.flags = QCE_ALG_AES | QCE_MODE_XTS,
|
||
|
|
.name = "xts(aes)",
|
||
|
|
.drv_name = "xts-aes-qce",
|
||
|
|
.blocksize = AES_BLOCK_SIZE,
|
||
|
|
.ivsize = AES_BLOCK_SIZE,
|
||
|
|
.min_keysize = AES_MIN_KEY_SIZE,
|
||
|
|
.max_keysize = AES_MAX_KEY_SIZE,
|
||
|
|
},
|
||
|
|
{
|
||
|
|
.flags = QCE_ALG_DES | QCE_MODE_ECB,
|
||
|
|
.name = "ecb(des)",
|
||
|
|
.drv_name = "ecb-des-qce",
|
||
|
|
.blocksize = DES_BLOCK_SIZE,
|
||
|
|
.ivsize = 0,
|
||
|
|
.min_keysize = DES_KEY_SIZE,
|
||
|
|
.max_keysize = DES_KEY_SIZE,
|
||
|
|
},
|
||
|
|
{
|
||
|
|
.flags = QCE_ALG_DES | QCE_MODE_CBC,
|
||
|
|
.name = "cbc(des)",
|
||
|
|
.drv_name = "cbc-des-qce",
|
||
|
|
.blocksize = DES_BLOCK_SIZE,
|
||
|
|
.ivsize = DES_BLOCK_SIZE,
|
||
|
|
.min_keysize = DES_KEY_SIZE,
|
||
|
|
.max_keysize = DES_KEY_SIZE,
|
||
|
|
},
|
||
|
|
{
|
||
|
|
.flags = QCE_ALG_3DES | QCE_MODE_ECB,
|
||
|
|
.name = "ecb(des3_ede)",
|
||
|
|
.drv_name = "ecb-3des-qce",
|
||
|
|
.blocksize = DES3_EDE_BLOCK_SIZE,
|
||
|
|
.ivsize = 0,
|
||
|
|
.min_keysize = DES3_EDE_KEY_SIZE,
|
||
|
|
.max_keysize = DES3_EDE_KEY_SIZE,
|
||
|
|
},
|
||
|
|
{
|
||
|
|
.flags = QCE_ALG_3DES | QCE_MODE_CBC,
|
||
|
|
.name = "cbc(des3_ede)",
|
||
|
|
.drv_name = "cbc-3des-qce",
|
||
|
|
.blocksize = DES3_EDE_BLOCK_SIZE,
|
||
|
|
.ivsize = DES3_EDE_BLOCK_SIZE,
|
||
|
|
.min_keysize = DES3_EDE_KEY_SIZE,
|
||
|
|
.max_keysize = DES3_EDE_KEY_SIZE,
|
||
|
|
},
|
||
|
|
};
|
||
|
|
|
||
|
|
static int qce_ablkcipher_register_one(const struct qce_ablkcipher_def *def,
|
||
|
|
struct qce_device *qce)
|
||
|
|
{
|
||
|
|
struct qce_alg_template *tmpl;
|
||
|
|
struct crypto_alg *alg;
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
tmpl = kzalloc(sizeof(*tmpl), GFP_KERNEL);
|
||
|
|
if (!tmpl)
|
||
|
|
return -ENOMEM;
|
||
|
|
|
||
|
|
alg = &tmpl->alg.crypto;
|
||
|
|
|
||
|
|
snprintf(alg->cra_name, CRYPTO_MAX_ALG_NAME, "%s", def->name);
|
||
|
|
snprintf(alg->cra_driver_name, CRYPTO_MAX_ALG_NAME, "%s",
|
||
|
|
def->drv_name);
|
||
|
|
|
||
|
|
alg->cra_blocksize = def->blocksize;
|
||
|
|
alg->cra_ablkcipher.ivsize = def->ivsize;
|
||
|
|
alg->cra_ablkcipher.min_keysize = def->min_keysize;
|
||
|
|
alg->cra_ablkcipher.max_keysize = def->max_keysize;
|
||
|
|
alg->cra_ablkcipher.setkey = qce_ablkcipher_setkey;
|
||
|
|
alg->cra_ablkcipher.encrypt = qce_ablkcipher_encrypt;
|
||
|
|
alg->cra_ablkcipher.decrypt = qce_ablkcipher_decrypt;
|
||
|
|
|
||
|
|
alg->cra_priority = 300;
|
||
|
|
alg->cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC |
|
||
|
|
CRYPTO_ALG_NEED_FALLBACK;
|
||
|
|
alg->cra_ctxsize = sizeof(struct qce_cipher_ctx);
|
||
|
|
alg->cra_alignmask = 0;
|
||
|
|
alg->cra_type = &crypto_ablkcipher_type;
|
||
|
|
alg->cra_module = THIS_MODULE;
|
||
|
|
alg->cra_init = qce_ablkcipher_init;
|
||
|
|
alg->cra_exit = qce_ablkcipher_exit;
|
||
|
|
INIT_LIST_HEAD(&alg->cra_list);
|
||
|
|
|
||
|
|
INIT_LIST_HEAD(&tmpl->entry);
|
||
|
|
tmpl->crypto_alg_type = CRYPTO_ALG_TYPE_ABLKCIPHER;
|
||
|
|
tmpl->alg_flags = def->flags;
|
||
|
|
tmpl->qce = qce;
|
||
|
|
|
||
|
|
ret = crypto_register_alg(alg);
|
||
|
|
if (ret) {
|
||
|
|
kfree(tmpl);
|
||
|
|
dev_err(qce->dev, "%s registration failed\n", alg->cra_name);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
list_add_tail(&tmpl->entry, &ablkcipher_algs);
|
||
|
|
dev_dbg(qce->dev, "%s is registered\n", alg->cra_name);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void qce_ablkcipher_unregister(struct qce_device *qce)
|
||
|
|
{
|
||
|
|
struct qce_alg_template *tmpl, *n;
|
||
|
|
|
||
|
|
list_for_each_entry_safe(tmpl, n, &ablkcipher_algs, entry) {
|
||
|
|
crypto_unregister_alg(&tmpl->alg.crypto);
|
||
|
|
list_del(&tmpl->entry);
|
||
|
|
kfree(tmpl);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static int qce_ablkcipher_register(struct qce_device *qce)
|
||
|
|
{
|
||
|
|
int ret, i;
|
||
|
|
|
||
|
|
for (i = 0; i < ARRAY_SIZE(ablkcipher_def); i++) {
|
||
|
|
ret = qce_ablkcipher_register_one(&ablkcipher_def[i], qce);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
err:
|
||
|
|
qce_ablkcipher_unregister(qce);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
const struct qce_algo_ops ablkcipher_ops = {
|
||
|
|
.type = CRYPTO_ALG_TYPE_ABLKCIPHER,
|
||
|
|
.register_algs = qce_ablkcipher_register,
|
||
|
|
.unregister_algs = qce_ablkcipher_unregister,
|
||
|
|
.async_req_handle = qce_ablkcipher_async_req_handle,
|
||
|
|
};
|