// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2021, Linaro Limited. All rights reserved.
*/
#include <linux/dma-mapping.h>
#include <linux/interrupt.h>
#include <crypto/gcm.h>
#include <crypto/authenc.h>
#include <crypto/internal/aead.h>
#include <crypto/internal/des.h>
#include <crypto/sha1.h>
#include <crypto/sha2.h>
#include <crypto/scatterwalk.h>
#include "aead.h"
#define CCM_NONCE_ADATA_SHIFT 6
#define CCM_NONCE_AUTHSIZE_SHIFT 3
#define MAX_CCM_ADATA_HEADER_LEN 6
static LIST_HEAD(aead_algs);
static void qce_aead_done(void *data)
{
struct crypto_async_request *async_req = data;
struct aead_request *req = aead_request_cast(async_req);
struct qce_aead_reqctx *rctx = aead_request_ctx_dma(req);
struct qce_aead_ctx *ctx = crypto_tfm_ctx(async_req->tfm);
struct qce_alg_template *tmpl = to_aead_tmpl(crypto_aead_reqtfm(req));
struct qce_device *qce = tmpl->qce;
struct qce_result_dump *result_buf = qce->dma.result_buf;
enum dma_data_direction dir_src, dir_dst;
bool diff_dst;
int error;
u32 status;
unsigned int totallen;
unsigned char tag[SHA256_DIGEST_SIZE] = {0};
int ret = 0;
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, "aead dma termination error (%d)\n",
error);
if (diff_dst)
dma_unmap_sg(qce->dev, rctx->src_sg, rctx->src_nents, dir_src);
dma_unmap_sg(qce->dev, rctx->dst_sg, rctx->dst_nents, dir_dst);
if (IS_CCM(rctx->flags)) {
if (req->assoclen) {
sg_free_table(&rctx->src_tbl);
if (diff_dst)
sg_free_table(&rctx->dst_tbl);
} else {
if (!(IS_DECRYPT(rctx->flags) && !diff_dst))
sg_free_table(&rctx->dst_tbl);
}
} else {
sg_free_table(&rctx->dst_tbl);
}
error = qce_check_status(qce, &status);
if (error < 0 && (error != -EBADMSG))
dev_err(qce->dev, "aead operation error (%x)\n", status);
if (IS_ENCRYPT(rctx->flags)) {
totallen = req->cryptlen + req->assoclen;
if (IS_CCM(rctx->flags))
scatterwalk_map_and_copy(rctx->ccmresult_buf, req->dst,
totallen, ctx->authsize, 1);
else
scatterwalk_map_and_copy(result_buf->auth_iv, req->dst,
totallen, ctx->authsize, 1);
} else if (!IS_CCM(rctx->flags)) {
totallen = req->cryptlen + req->assoclen - ctx->authsize;
scatterwalk_map_and_copy(tag, req->src, totallen, ctx->authsize, 0);
ret = memcmp(result_buf->auth_iv, tag, ctx->authsize);
if (ret) {
pr_err("Bad message error\n");
error = -EBADMSG;
}
}
qce->async_req_done(qce, error);
}
static struct scatterlist *
qce_aead_prepare_result_buf(struct sg_table *tbl, struct aead_request *req)
{
struct qce_aead_reqctx *rctx = aead_request_ctx_dma(req);
struct qce_alg_template *tmpl = to_aead_tmpl(crypto_aead_reqtfm(req));
struct qce_device *qce = tmpl->qce;
sg_init_one(&rctx->result_sg, qce->dma.result_buf, QCE_RESULT_BUF_SZ);
return qce_sgtable_add(tbl, &rctx->result_sg, QCE_RESULT_BUF_SZ);
}
static struct scatterlist *
qce_aead_prepare_ccm_result_buf(struct sg_table *tbl, struct aead_request *req)
{
struct qce_aead_reqctx *rctx = aead_request_ctx_dma(req);
sg_init_one(&rctx->result_sg, rctx->ccmresult_buf, QCE_BAM_BURST_SIZE);
return qce_sgtable_add(tbl, &rctx->result_sg, QCE_BAM_BURST_SIZE);
}
static struct scatterlist *
qce_aead_prepare_dst_buf(struct aead_request *req)
{
struct qce_aead_reqctx *rctx = aead_request_ctx_dma(req);
struct qce_alg_template *tmpl = to_aead_tmpl(crypto_aead_reqtfm(req));
struct qce_device *qce = tmpl->qce;
struct scatterlist *sg, *msg_sg, __sg[2];
gfp_t gfp;
unsigned int assoclen = req->assoclen;
unsigned int totallen;
int ret;
totallen = rctx->cryptlen + assoclen;
rctx->dst_nents = sg_nents_for_len(req->dst, totallen);
if (rctx->dst_nents < 0) {
dev_err(qce->dev, "Invalid numbers of dst SG.\n");
return ERR_PTR(-EINVAL);
}
if (IS_CCM(rctx->flags))
rctx->dst_nents += 2;
else
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 ERR_PTR(ret);
if (IS_CCM(rctx->flags) && assoclen) {
/* Get the dst buffer */
msg_sg = scatterwalk_ffwd(__sg, req->dst, assoclen);
sg = qce_sgtable_add(&rctx->dst_tbl, &rctx->adata_sg,
rctx->assoclen);
if (IS_ERR(sg)) {
ret = PTR_ERR(sg);
goto dst_tbl_free;
}
/* dst buffer */
sg = qce_sgtable_add(&rctx->dst_tbl, msg_sg, rctx->cryptlen);
if (IS_ERR(sg)) {
ret = PTR_ERR(sg);
goto dst_tbl_free;
}
totallen = rctx->cryptlen + rctx->assoclen;
} else {
if (totallen) {
sg = qce_sgtable_add(&rctx->dst_tbl, req->dst, totallen);
if (IS_ERR(sg))
goto dst_tbl_free;
}
}
if (IS_CCM(rctx->flags))
sg = qce_aead_prepare_ccm_result_buf(&rctx->dst_tbl, req);
else
sg = qce_aead_prepare_result_buf(&rctx->dst_tbl, req);
if (IS_ERR(sg))
goto dst_tbl_free;
sg_mark_end(sg);
rctx->dst_sg = rctx->dst_tbl.sgl;
rctx->dst_nents = sg_nents_for_len(rctx->dst_sg, totallen) + 1;
return sg;
dst_tbl_free:
sg_free_table(&rctx->dst_tbl);
return sg;
}
static int
qce_aead_ccm_prepare_buf_assoclen(struct aead_request *req)
{
struct scatterlist *sg, *msg_sg, __sg[2];
struct crypto_aead *tfm = crypto_aead_reqtfm(req);
struct qce_aead_reqctx *rctx = aead_request_ctx_dma(req);
struct qce_aead_ctx *ctx = crypto_aead_ctx(tfm);
unsigned int assoclen = rctx->assoclen;
unsigned int adata_header_len, cryptlen, totallen;
gfp_t gfp;
bool diff_dst;
int ret;
if (IS_DECRYPT(rctx->flags))
cryptlen = rctx->cryptlen + ctx->authsize;
else
cryptlen = rctx->cryptlen;
totallen = cryptlen + req->assoclen;
/* Get the msg */
msg_sg = scatterwalk_ffwd(__sg, req->src, req->assoclen);
rctx->adata = kzalloc((ALIGN(assoclen, 16) + MAX_CCM_ADATA_HEADER_LEN) *
sizeof(unsigned char), GFP_ATOMIC);
if (!rctx->adata)
return -ENOMEM;
/*
* Format associated data (RFC3610 and NIST 800-38C)
* Even though specification allows for AAD to be up to 2^64 - 1 bytes,
* the assoclen field in aead_request is unsigned int and thus limits
* the AAD to be up to 2^32 - 1 bytes. So we handle only two scenarios
* while forming the header for AAD.
*/
if (assoclen < 0xff00) {
adata_header_len = 2;
*(__be16 *)rctx->adata = cpu_to_be16(assoclen);
} else {
adata_header_len = 6;
*(__be16 *)rctx->adata = cpu_to_be16(0xfffe);
*(__be32 *)(rctx->adata + 2) = cpu_to_be32(assoclen);
}
/* Copy the associated data */
if (sg_copy_to_buffer(req->src, sg_nents_for_len(req->src, assoclen),
rctx->adata + adata_header_len,
assoclen) != assoclen)
return -EINVAL;
/* Pad associated data to block size */
rctx->assoclen = ALIGN(assoclen + adata_header_len, 16);
diff_dst = (req->src != req->dst) ? true : false;
if (diff_dst)
rctx->src_nents = sg_nents_for_len(req->src, totallen) + 1;
else
rctx->src_nents = sg_nents_for_len(req->src, totallen) + 2;
gfp = (req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP) ? GFP_KERNEL : GFP_ATOMIC;
ret = sg_alloc_table(&rctx->src_tbl, rctx->src_nents, gfp);
if (ret)
return ret;
/* Associated Data */
sg_init_one(&rctx->adata_sg, rctx->adata, rctx->assoclen);
sg = qce_sgtable_add(&rctx->src_tbl, &rctx->adata_sg,
rctx->assoclen);
if (IS_ERR(sg)) {
ret = PTR_ERR(sg);
goto err_free;
}
/* src msg */
sg = qce_sgtable_add(&rctx->src_tbl, msg_sg, cryptlen);
if (IS_ERR(sg)) {
ret = PTR_ERR(sg);
goto err_free;
}
if (!diff_dst) {
/*
* For decrypt, when src and dst buffers are same, there is already space
* in the buffer for padded 0's which is output in lieu of
* the MAC that is input. So skip the below.
*/
if (!IS_DECRYPT(rctx->flags)) {
sg = qce_aead_prepare_ccm_result_buf(&rctx->src_tbl, req);
if (IS_ERR(sg)) {
ret = PTR_ERR(sg);
goto err_free;
}
}
}
sg_mark_end(sg);
rctx->src_sg = rctx->src_tbl.sgl;
totallen = cryptlen + rctx->assoclen;
rctx->src_nents = sg_nents_for_len(rctx->src_sg, totallen);
if (diff_dst) {
sg = qce_aead_prepare_dst_buf(req);
if (IS_ERR(sg)) {
ret = PTR_ERR(sg);
goto err_free;
}
} else {
if (IS_ENCRYPT(rctx->flags))
rctx->dst_nents = rctx->src_nents + 1;
else
rctx->dst_nents = rctx->src_nents;
rctx->dst_sg = rctx->src_sg;
}
return 0;
err_free:
sg_free_table(&rctx->src_tbl);
return ret;
}
static int qce_aead_prepare_buf(struct aead_request *req)
{
struct qce_aead_reqctx *rctx = aead_request_ctx_dma(req);
struct qce_alg_template *tmpl = to_aead_tmpl(crypto_aead_reqtfm(req));
struct qce_device *qce = tmpl->qce;
struct scatterlist *sg;
bool diff_dst = (req->src != req->dst) ? true : false;
unsigned int totallen;
totallen = rctx->cryptlen + rctx->assoclen;
sg = qce_aead_prepare_dst_buf(req);
if (IS_ERR(sg))
return PTR_ERR(sg);
if (diff_dst) {
rctx->src_nents = sg_nents_for_len(req->src, totallen);
if (rctx->src_nents < 0) {
dev_err(qce->dev, "Invalid numbers of src SG.\n");
return -EINVAL;
}
rctx->src_sg = req->src;
} else {
rctx->src_nents = rctx->dst_nents - 1;
rctx->src_sg = rctx->dst_sg;
}
return 0;
}
static int qce_aead_ccm_prepare_buf(struct aead_request *req)
{
struct qce_aead_reqctx *rctx = aead_request_ctx_dma(req);
struct crypto_aead *tfm = crypto_aead_reqtfm(req);
struct qce_aead_ctx *ctx = crypto_aead_ctx(tfm);
struct scatterlist *sg;
bool diff_dst = (req->src != req->dst) ? true : false;
unsigned int cryptlen;
if (rctx->assoclen)
return qce_aead_ccm_prepare_buf_assoclen(req);
if (IS_ENCRYPT(rctx->flags))
return qce_aead_prepare_buf(req);
cryptlen = rctx->cryptlen + ctx->authsize;
if (diff_dst) {
rctx->src_nents = sg_nents_for_len(req->src, cryptlen);
rctx->src_sg = req->src;
sg = qce_aead_prepare_dst_buf(req);
if (IS_ERR(sg))
return PTR_ERR(sg);
} else {
rctx->src_nents = sg_nents_for_len(req->src, cryptlen);
rctx->src_sg = req->src;
rctx->dst_nents = rctx->src_nents;
rctx->dst_sg = rctx->src_sg;
}
return 0;
}
static int qce_aead_create_ccm_nonce(struct qce_aead_reqctx *rctx, struct qce_aead_ctx *ctx)
{
unsigned int msglen_size, ivsize;
u8 msg_len[4];
int i;
if (!rctx || !rctx->iv)
return -EINVAL;
msglen_size = rctx->iv[0] + 1;
/* Verify that msg len size is valid */
if (msglen_size < 2 || msglen_size > 8)
return -EINVAL;
ivsize = rctx->ivsize;
/*
* Clear the msglen bytes in IV.
* Else the h/w engine and nonce will use any stray value pending there.
*/
if (!IS_CCM_RFC4309(rctx->flags)) {
for (i = 0; i < msglen_size; i++)
rctx->iv[ivsize - i - 1] = 0;
}
/*
* The crypto framework encodes cryptlen as unsigned int. Thus, even though
* spec allows for upto 8 bytes to encode msg_len only 4 bytes are needed.
*/
if (msglen_size > 4)
msglen_size = 4;
memcpy(&msg_len[0], &rctx->cryptlen, 4);
memcpy(&rctx->ccm_nonce[0], rctx->iv, rctx->ivsize);
if (rctx->assoclen)
rctx->ccm_nonce[0] |= 1 << CCM_NONCE_ADATA_SHIFT;
rctx->ccm_nonce[0] |= ((ctx->authsize - 2) / 2) <<
CCM_NONCE_AUTHSIZE_SHIFT;
for (i = 0; i < msglen_size; i++)
rctx->ccm_nonce[QCE_MAX_NONCE - i - 1] = msg_len[i];
return 0;
}
static int
qce_aead_async_req_handle(struct crypto_async_request *async_req)
{
struct aead_request *req = aead_request_cast(async_req);
struct qce_aead_reqctx *rctx = aead_request_ctx_dma(req);
struct crypto_aead *tfm = crypto_aead_reqtfm(req);
struct qce_aead_ctx *ctx = crypto_tfm_ctx(async_req->tfm);
struct qce_alg_template *tmpl = to_aead_tmpl(crypto_aead_reqtfm(req));
struct qce_device *qce = tmpl->qce;
enum dma_data_direction dir_src, dir_dst;
bool diff_dst;
int dst_nents, src_nents, ret;
if (IS_CCM_RFC4309(rctx->flags)) {
memset(rctx->ccm_rfc4309_iv, 0, QCE_MAX_IV_SIZE);
rctx->ccm_rfc4309_iv[0] = 3;
memcpy(&rctx->ccm_rfc4309_iv[1], ctx->ccm4309_salt, QCE_CCM4309_SALT_SIZE);
memcpy(&rctx->ccm_rfc4309_iv[4], req->iv, 8);
rctx->iv = rctx->ccm_rfc4309_iv;
rctx->ivsize = AES_BLOCK_SIZE;
} else {
rctx->iv = req->iv;
rctx->ivsize = crypto_aead_ivsize(tfm);
}
if (IS_CCM_RFC4309(rctx->flags))
rctx->assoclen = req->assoclen - 8;
else
rctx->assoclen = req->assoclen;
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;
if (IS_CCM(rctx->flags)) {
ret = qce_aead_create_ccm_nonce(rctx, ctx);
if (ret)
return ret;
}
if (IS_CCM(rctx->flags))
ret = qce_aead_ccm_prepare_buf(req);
else
ret = qce_aead_prepare_buf(req);
if (ret)
return ret;
dst_nents = dma_map_sg(qce->dev, rctx->dst_sg, rctx->dst_nents, dir_dst);
if (!dst_nents) {
ret = -EIO;
goto error_free;
}
if (diff_dst) {
src_nents = dma_map_sg(qce->dev, rctx->src_sg, rctx->src_nents, dir_src);
if (src_nents < 0) {
ret = src_nents;
goto error_unmap_dst;
}
} else {
if (IS_CCM(rctx->flags) && IS_DECRYPT(rctx->flags))
src_nents = dst_nents;
else
src_nents = dst_nents - 1;
}
ret = qce_dma_prep_sgs(&qce->dma, rctx->src_sg, src_nents, rctx->dst_sg, dst_nents,
qce_aead_done, async_req);
if (ret)
goto error_unmap_src;
qce_dma_issue_pending(&qce->dma);
ret = qce_start(async_req, tmpl->crypto_alg_type);
if (ret)
goto error_terminate;
return 0;
error_terminate:
qce_dma_terminate_all(&qce->dma);
error_unmap_src:
if (diff_dst)
dma_unmap_sg(qce->dev, req->src, rctx->src_nents, dir_src);
error_unmap_dst:
dma_unmap_sg(qce->dev, rctx->dst_sg, rctx->dst_nents, dir_dst);
error_free:
if (IS_CCM(rctx->flags) && rctx->assoclen) {
sg_free_table(&rctx->src_tbl);
if (diff_dst)
sg_free_table(&rctx->dst_tbl);
} else {
sg_free_table(&rctx->dst_tbl);
}
return ret;
}
static int qce_aead_crypt(struct aead_request *req, int encrypt)
{
struct crypto_aead *tfm = crypto_aead_reqtfm(req);
struct qce_aead_reqctx *rctx = aead_request_ctx_dma(req);
struct qce_aead_ctx *ctx = crypto_aead_ctx(tfm);
struct qce_alg_template *tmpl = to_aead_tmpl(tfm);
unsigned int blocksize = crypto_aead_blocksize(tfm);
rctx->flags = tmpl->alg_flags;
rctx->flags |= encrypt ? QCE_ENCRYPT : QCE_DECRYPT;
if (encrypt)
rctx->cryptlen = req->cryptlen;
else
rctx->cryptlen = req->cryptlen - ctx->authsize;
/* CE does not handle 0 length messages */
if (!rctx->cryptlen) {
if (!(IS_CCM(rctx->flags) && IS_DECRYPT(rctx->flags)))
ctx->need_fallback = true;
}
/* If fallback is needed, schedule and exit */
if (ctx->need_fallback) {
/* Reset need_fallback in case the same ctx is used for another transaction */
ctx->need_fallback = false;
aead_request_set_tfm(&rctx->fallback_req, ctx->fallback);
aead_request_set_callback(&rctx->fallback_req, req->base.flags,
req->base.complete, req->base.data);
aead_request_set_crypt(&rctx->fallback_req, req->src,
req->dst, req->cryptlen, req->iv);
aead_request_set_ad(&rctx->fallback_req, req->assoclen);
return encrypt ? crypto_aead_encrypt(&rctx->fallback_req) :
crypto_aead_decrypt(&rctx->fallback_req);
}
/*
* CBC algorithms require message lengths to be
* multiples of block size.
*/
if (IS_CBC(rctx->flags) && !IS_ALIGNED(rctx->cryptlen, blocksize))
return -EINVAL;
/* RFC4309 supported AAD size 16 bytes/20 bytes */
if (IS_CCM_RFC4309(rctx->flags))
if (crypto_ipsec_check_assoclen(req->assoclen))
return -EINVAL;
return tmpl->qce->async_req_enqueue(tmpl->qce, &req->base);
}
static int qce_aead_encrypt(struct aead_request *req)
{
return qce_aead_crypt(req, 1);
}
static int qce_aead_decrypt(struct aead_request *req)
{
return qce_aead_crypt(req, 0);
}
static int qce_aead_ccm_setkey(struct crypto_aead *tfm, const u8 *key,
unsigned int keylen)
{
struct qce_aead_ctx *ctx = crypto_aead_ctx(tfm);
unsigned long flags = to_aead_tmpl(tfm)->alg_flags;
if (IS_CCM_RFC4309(flags)) {
if (keylen < QCE_CCM4309_SALT_SIZE)
return -EINVAL;
keylen -= QCE_CCM4309_SALT_SIZE;
memcpy(ctx->ccm4309_salt, key + keylen, QCE_CCM4309_SALT_SIZE);
}
if (keylen != AES_KEYSIZE_128 && keylen != AES_KEYSIZE_256 && keylen != AES_KEYSIZE_192)
return -EINVAL;
ctx->enc_keylen = keylen;
ctx->auth_keylen = keylen;
memcpy(ctx->enc_key, key, keylen);
memcpy(ctx->auth_key, key, keylen);
if (keylen == AES_KEYSIZE_192)
ctx->need_fallback = true;
return IS_CCM_RFC4309(flags) ?
crypto_aead_setkey(ctx->fallback, key, keylen + QCE_CCM4309_SALT_SIZE) :
crypto_aead_setkey(ctx->fallback, key, keylen);
}
static int qce_aead_setkey(struct crypto_aead *tfm, const u8 *key, unsigned int keylen)
{
struct qce_aead_ctx *ctx = crypto_aead_ctx(tfm);
struct crypto_authenc_keys authenc_keys;
unsigned long flags = to_aead_tmpl(tfm)->alg_flags;
u32 _key[6];
int err;
err = crypto_authenc_extractkeys(&authenc_keys, key, keylen);
if (err)
return err;
if (authenc_keys.enckeylen > QCE_MAX_KEY_SIZE ||
authenc_keys.authkeylen > QCE_MAX_KEY_SIZE)
return -EINVAL;
if (IS_DES(flags)) {
err = verify_aead_des_key(tfm, authenc_keys.enckey, authenc_keys.enckeylen);
if (err)
return err;
} else if (IS_3DES(flags)) {
err = verify_aead_des3_key(tfm, authenc_keys.enckey, authenc_keys.enckeylen);
if (err)
return err;
/*
* The crypto engine does not support any two keys
* being the same for triple des algorithms. The
* verify_skcipher_des3_key does not check for all the
* below conditions. Schedule fallback in this case.
*/
memcpy(_key, authenc_keys.enckey, DES3_EDE_KEY_SIZE);
if (!((_key[0] ^ _key[2]) | (_key[1] ^ _key[3])) ||
!((_key[2] ^ _key[4]) | (_key[3] ^ _key[5])) ||
!((_key[0] ^ _key[4]) | (_key[1] ^ _key[5])))
ctx->need_fallback = true;
} else if (IS_AES(flags)) {
/* No random key sizes */
if (authenc_keys.enckeylen != AES_KEYSIZE_128 &&
authenc_keys.enckeylen != AES_KEYSIZE_192 &&
authenc_keys.enckeylen != AES_KEYSIZE_256)
return -EINVAL;
if (authenc_keys.enckeylen == AES_KEYSIZE_192)
ctx->need_fallback = true;
}
ctx->enc_keylen = authenc_keys.enckeylen;
ctx->auth_keylen = authenc_keys.authkeylen;
memcpy(ctx->enc_key, authenc_keys.enckey, authenc_keys.enckeylen);
memset(ctx->auth_key, 0, sizeof(ctx->auth_key));
memcpy(ctx->auth_key, authenc_keys.authkey, authenc_keys.authkeylen);
return crypto_aead_setkey(ctx->fallback, key, keylen);
}
static int qce_aead_setauthsize(struct crypto_aead *tfm, unsigned int authsize)
{
struct qce_aead_ctx *ctx = crypto_aead_ctx(tfm);
unsigned long flags = to_aead_tmpl(tfm)->alg_flags;
if (IS_CCM(flags)) {
if (authsize < 4 || authsize > 16 || authsize % 2)
return -EINVAL;
if (IS_CCM_RFC4309(flags) && (authsize < 8 || authsize % 4))
return -EINVAL;
}
ctx->authsize = authsize;
return crypto_aead_setauthsize(ctx->fallback, authsize);
}
static int qce_aead_init(struct crypto_aead *tfm)
{
struct qce_aead_ctx *ctx = crypto_aead_ctx(tfm);
ctx->need_fallback = false;
ctx->fallback = crypto_alloc_aead(crypto_tfm_alg_name(&tfm->base),
0, CRYPTO_ALG_NEED_FALLBACK);
if (IS_ERR(ctx->fallback))
return PTR_ERR(ctx->fallback);
crypto_aead_set_reqsize_dma(tfm, sizeof(struct qce_aead_reqctx) +
crypto_aead_reqsize(ctx->fallback));
return 0;
}
static void qce_aead_exit(struct crypto_aead *tfm)
{
struct qce_aead_ctx *ctx = crypto_aead_ctx(tfm);
crypto_free_aead(ctx->fallback);
}
struct qce_aead_def {
unsigned long flags;
const char *name;
const char *drv_name;
unsigned int blocksize;
unsigned int chunksize;
unsigned int ivsize;
unsigned int maxauthsize;
};
static const struct qce_aead_def aead_def[] = {
{
.flags = QCE_ALG_DES | QCE_MODE_CBC | QCE_HASH_SHA1_HMAC,
.name = "authenc(hmac(sha1),cbc(des))",
.drv_name = "authenc-hmac-sha1-cbc-des-qce",
.blocksize = DES_BLOCK_SIZE,
.ivsize = DES_BLOCK_SIZE,
.maxauthsize = SHA1_DIGEST_SIZE,
},
{
.flags = QCE_ALG_3DES | QCE_MODE_CBC | QCE_HASH_SHA1_HMAC,
.name = "authenc(hmac(sha1),cbc(des3_ede))",
.drv_name = "authenc-hmac-sha1-cbc-3des-qce",
.blocksize = DES3_EDE_BLOCK_SIZE,
.ivsize = DES3_EDE_BLOCK_SIZE,
.maxauthsize = SHA1_DIGEST_SIZE,
},
{
.flags = QCE_ALG_DES | QCE_MODE_CBC | QCE_HASH_SHA256_HMAC,
.name = "authenc(hmac(sha256),cbc(des))",
.drv_name = "authenc-hmac-sha256-cbc-des-qce",
.blocksize = DES_BLOCK_SIZE,
.ivsize = DES_BLOCK_SIZE,
.maxauthsize = SHA256_DIGEST_SIZE,
},
{
.flags = QCE_ALG_3DES | QCE_MODE_CBC | QCE_HASH_SHA256_HMAC,
.name = "authenc(hmac(sha256),cbc(des3_ede))",
.drv_name = "authenc-hmac-sha256-cbc-3des-qce",
.blocksize = DES3_EDE_BLOCK_SIZE,
.ivsize = DES3_EDE_BLOCK_SIZE,
.maxauthsize = SHA256_DIGEST_SIZE,
},
{
.flags = QCE_ALG_AES | QCE_MODE_CBC | QCE_HASH_SHA256_HMAC,
.name = "authenc(hmac(sha256),cbc(aes))",
.drv_name = "authenc-hmac-sha256-cbc-aes-qce",
.blocksize = AES_BLOCK_SIZE,
.ivsize = AES_BLOCK_SIZE,
.maxauthsize = SHA256_DIGEST_SIZE,
},
{
.flags = QCE_ALG_AES | QCE_MODE_CCM,
.name = "ccm(aes)",
.drv_name = "ccm-aes-qce",
.blocksize = 1,
.ivsize = AES_BLOCK_SIZE,
.maxauthsize = AES_BLOCK_SIZE,
},
{
.flags = QCE_ALG_AES | QCE_MODE_CCM | QCE_MODE_CCM_RFC4309,
.name = "rfc4309(ccm(aes))",
.drv_name = "rfc4309-ccm-aes-qce",
.blocksize = 1,
.ivsize = 8,
.maxauthsize = AES_BLOCK_SIZE,
},
};
static int qce_aead_register_one(const struct qce_aead_def *def, struct qce_device *qce)
{
struct qce_alg_template *tmpl;
struct aead_alg *alg;
int ret;
tmpl = kzalloc(sizeof(*tmpl), GFP_KERNEL);
if (!tmpl)
return -ENOMEM;
alg = &tmpl->alg.aead;
snprintf(alg->base.cra_name, CRYPTO_MAX_ALG_NAME, "%s", def->name);
snprintf(alg->base.cra_driver_name, CRYPTO_MAX_ALG_NAME, "%s",
def->drv_name);
alg->base.cra_blocksize = def->blocksize;
alg->chunksize = def->chunksize;
alg->ivsize = def->ivsize;
alg->maxauthsize = def->maxauthsize;
if (IS_CCM(def->flags))
alg->setkey = qce_aead_ccm_setkey;
else
alg->setkey = qce_aead_setkey;
alg->setauthsize = qce_aead_setauthsize;
alg->encrypt = qce_aead_encrypt;
alg->decrypt = qce_aead_decrypt;
alg->init = qce_aead_init;
alg->exit = qce_aead_exit;
alg->base.cra_priority = 300;
alg->base.cra_flags = CRYPTO_ALG_ASYNC |
CRYPTO_ALG_ALLOCATES_MEMORY |
CRYPTO_ALG_KERN_DRIVER_ONLY |
CRYPTO_ALG_NEED_FALLBACK;
alg->base.cra_ctxsize = sizeof(struct qce_aead_ctx);
alg->base.cra_alignmask = 0;
alg->base.cra_module = THIS_MODULE;
INIT_LIST_HEAD(&tmpl->entry);
tmpl->crypto_alg_type = CRYPTO_ALG_TYPE_AEAD;
tmpl->alg_flags = def->flags;
tmpl->qce = qce;
ret = crypto_register_aead(alg);
if (ret) {
dev_err(qce->dev, "%s registration failed\n", alg->base.cra_name);
kfree(tmpl);
return ret;
}
list_add_tail(&tmpl->entry, &aead_algs);
dev_dbg(qce->dev, "%s is registered\n", alg->base.cra_name);
return 0;
}
static void qce_aead_unregister(struct qce_device *qce)
{
struct qce_alg_template *tmpl, *n;
list_for_each_entry_safe(tmpl, n, &aead_algs, entry) {
crypto_unregister_aead(&tmpl->alg.aead);
list_del(&tmpl->entry);
kfree(tmpl);
}
}
static int qce_aead_register(struct qce_device *qce)
{
int ret, i;
for (i = 0; i < ARRAY_SIZE(aead_def); i++) {
ret = qce_aead_register_one(&aead_def[i], qce);
if (ret)
goto err;
}
return 0;
err:
qce_aead_unregister(qce);
return ret;
}
const struct qce_algo_ops aead_ops = {
.type = CRYPTO_ALG_TYPE_AEAD,
.register_algs = qce_aead_register,
.unregister_algs = qce_aead_unregister,
.async_req_handle = qce_aead_async_req_handle,
};
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