558 lines
14 KiB
C
558 lines
14 KiB
C
|
// SPDX-License-Identifier: GPL-2.0-only
|
||
|
|
/*
|
||
|
|
* Bit sliced AES using NEON instructions
|
||
|
|
*
|
||
|
|
* Copyright (C) 2017 Linaro Ltd <ard.biesheuvel@linaro.org>
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <asm/neon.h>
|
||
|
|
#include <asm/simd.h>
|
||
|
|
#include <crypto/aes.h>
|
||
|
|
#include <crypto/ctr.h>
|
||
|
|
#include <crypto/internal/cipher.h>
|
||
|
|
#include <crypto/internal/simd.h>
|
||
|
|
#include <crypto/internal/skcipher.h>
|
||
|
|
#include <crypto/scatterwalk.h>
|
||
|
|
#include <crypto/xts.h>
|
||
|
|
#include <linux/module.h>
|
||
|
|
|
||
|
|
MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>");
|
||
|
|
MODULE_LICENSE("GPL v2");
|
||
|
|
|
||
|
|
MODULE_ALIAS_CRYPTO("ecb(aes)");
|
||
|
|
MODULE_ALIAS_CRYPTO("cbc(aes)-all");
|
||
|
|
MODULE_ALIAS_CRYPTO("ctr(aes)");
|
||
|
|
MODULE_ALIAS_CRYPTO("xts(aes)");
|
||
|
|
|
||
|
|
MODULE_IMPORT_NS(CRYPTO_INTERNAL);
|
||
|
|
|
||
|
|
asmlinkage void aesbs_convert_key(u8 out[], u32 const rk[], int rounds);
|
||
|
|
|
||
|
|
asmlinkage void aesbs_ecb_encrypt(u8 out[], u8 const in[], u8 const rk[],
|
||
|
|
int rounds, int blocks);
|
||
|
|
asmlinkage void aesbs_ecb_decrypt(u8 out[], u8 const in[], u8 const rk[],
|
||
|
|
int rounds, int blocks);
|
||
|
|
|
||
|
|
asmlinkage void aesbs_cbc_decrypt(u8 out[], u8 const in[], u8 const rk[],
|
||
|
|
int rounds, int blocks, u8 iv[]);
|
||
|
|
|
||
|
|
asmlinkage void aesbs_ctr_encrypt(u8 out[], u8 const in[], u8 const rk[],
|
||
|
|
int rounds, int blocks, u8 ctr[]);
|
||
|
|
|
||
|
|
asmlinkage void aesbs_xts_encrypt(u8 out[], u8 const in[], u8 const rk[],
|
||
|
|
int rounds, int blocks, u8 iv[], int);
|
||
|
|
asmlinkage void aesbs_xts_decrypt(u8 out[], u8 const in[], u8 const rk[],
|
||
|
|
int rounds, int blocks, u8 iv[], int);
|
||
|
|
|
||
|
|
struct aesbs_ctx {
|
||
|
|
int rounds;
|
||
|
|
u8 rk[13 * (8 * AES_BLOCK_SIZE) + 32] __aligned(AES_BLOCK_SIZE);
|
||
|
|
};
|
||
|
|
|
||
|
|
struct aesbs_cbc_ctx {
|
||
|
|
struct aesbs_ctx key;
|
||
|
|
struct crypto_skcipher *enc_tfm;
|
||
|
|
};
|
||
|
|
|
||
|
|
struct aesbs_xts_ctx {
|
||
|
|
struct aesbs_ctx key;
|
||
|
|
struct crypto_cipher *cts_tfm;
|
||
|
|
struct crypto_cipher *tweak_tfm;
|
||
|
|
};
|
||
|
|
|
||
|
|
struct aesbs_ctr_ctx {
|
||
|
|
struct aesbs_ctx key; /* must be first member */
|
||
|
|
struct crypto_aes_ctx fallback;
|
||
|
|
};
|
||
|
|
|
||
|
|
static int aesbs_setkey(struct crypto_skcipher *tfm, const u8 *in_key,
|
||
|
|
unsigned int key_len)
|
||
|
|
{
|
||
|
|
struct aesbs_ctx *ctx = crypto_skcipher_ctx(tfm);
|
||
|
|
struct crypto_aes_ctx rk;
|
||
|
|
int err;
|
||
|
|
|
||
|
|
err = aes_expandkey(&rk, in_key, key_len);
|
||
|
|
if (err)
|
||
|
|
return err;
|
||
|
|
|
||
|
|
ctx->rounds = 6 + key_len / 4;
|
||
|
|
|
||
|
|
kernel_neon_begin();
|
||
|
|
aesbs_convert_key(ctx->rk, rk.key_enc, ctx->rounds);
|
||
|
|
kernel_neon_end();
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int __ecb_crypt(struct skcipher_request *req,
|
||
|
|
void (*fn)(u8 out[], u8 const in[], u8 const rk[],
|
||
|
|
int rounds, int blocks))
|
||
|
|
{
|
||
|
|
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
|
||
|
|
struct aesbs_ctx *ctx = crypto_skcipher_ctx(tfm);
|
||
|
|
struct skcipher_walk walk;
|
||
|
|
int err;
|
||
|
|
|
||
|
|
err = skcipher_walk_virt(&walk, req, false);
|
||
|
|
|
||
|
|
while (walk.nbytes >= AES_BLOCK_SIZE) {
|
||
|
|
unsigned int blocks = walk.nbytes / AES_BLOCK_SIZE;
|
||
|
|
|
||
|
|
if (walk.nbytes < walk.total)
|
||
|
|
blocks = round_down(blocks,
|
||
|
|
walk.stride / AES_BLOCK_SIZE);
|
||
|
|
|
||
|
|
kernel_neon_begin();
|
||
|
|
fn(walk.dst.virt.addr, walk.src.virt.addr, ctx->rk,
|
||
|
|
ctx->rounds, blocks);
|
||
|
|
kernel_neon_end();
|
||
|
|
err = skcipher_walk_done(&walk,
|
||
|
|
walk.nbytes - blocks * AES_BLOCK_SIZE);
|
||
|
|
}
|
||
|
|
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int ecb_encrypt(struct skcipher_request *req)
|
||
|
|
{
|
||
|
|
return __ecb_crypt(req, aesbs_ecb_encrypt);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int ecb_decrypt(struct skcipher_request *req)
|
||
|
|
{
|
||
|
|
return __ecb_crypt(req, aesbs_ecb_decrypt);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int aesbs_cbc_setkey(struct crypto_skcipher *tfm, const u8 *in_key,
|
||
|
|
unsigned int key_len)
|
||
|
|
{
|
||
|
|
struct aesbs_cbc_ctx *ctx = crypto_skcipher_ctx(tfm);
|
||
|
|
struct crypto_aes_ctx rk;
|
||
|
|
int err;
|
||
|
|
|
||
|
|
err = aes_expandkey(&rk, in_key, key_len);
|
||
|
|
if (err)
|
||
|
|
return err;
|
||
|
|
|
||
|
|
ctx->key.rounds = 6 + key_len / 4;
|
||
|
|
|
||
|
|
kernel_neon_begin();
|
||
|
|
aesbs_convert_key(ctx->key.rk, rk.key_enc, ctx->key.rounds);
|
||
|
|
kernel_neon_end();
|
||
|
|
memzero_explicit(&rk, sizeof(rk));
|
||
|
|
|
||
|
|
return crypto_skcipher_setkey(ctx->enc_tfm, in_key, key_len);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int cbc_encrypt(struct skcipher_request *req)
|
||
|
|
{
|
||
|
|
struct skcipher_request *subreq = skcipher_request_ctx(req);
|
||
|
|
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
|
||
|
|
struct aesbs_cbc_ctx *ctx = crypto_skcipher_ctx(tfm);
|
||
|
|
|
||
|
|
skcipher_request_set_tfm(subreq, ctx->enc_tfm);
|
||
|
|
skcipher_request_set_callback(subreq,
|
||
|
|
skcipher_request_flags(req),
|
||
|
|
NULL, NULL);
|
||
|
|
skcipher_request_set_crypt(subreq, req->src, req->dst,
|
||
|
|
req->cryptlen, req->iv);
|
||
|
|
|
||
|
|
return crypto_skcipher_encrypt(subreq);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int cbc_decrypt(struct skcipher_request *req)
|
||
|
|
{
|
||
|
|
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
|
||
|
|
struct aesbs_cbc_ctx *ctx = crypto_skcipher_ctx(tfm);
|
||
|
|
struct skcipher_walk walk;
|
||
|
|
int err;
|
||
|
|
|
||
|
|
err = skcipher_walk_virt(&walk, req, false);
|
||
|
|
|
||
|
|
while (walk.nbytes >= AES_BLOCK_SIZE) {
|
||
|
|
unsigned int blocks = walk.nbytes / AES_BLOCK_SIZE;
|
||
|
|
|
||
|
|
if (walk.nbytes < walk.total)
|
||
|
|
blocks = round_down(blocks,
|
||
|
|
walk.stride / AES_BLOCK_SIZE);
|
||
|
|
|
||
|
|
kernel_neon_begin();
|
||
|
|
aesbs_cbc_decrypt(walk.dst.virt.addr, walk.src.virt.addr,
|
||
|
|
ctx->key.rk, ctx->key.rounds, blocks,
|
||
|
|
walk.iv);
|
||
|
|
kernel_neon_end();
|
||
|
|
err = skcipher_walk_done(&walk,
|
||
|
|
walk.nbytes - blocks * AES_BLOCK_SIZE);
|
||
|
|
}
|
||
|
|
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int cbc_init(struct crypto_skcipher *tfm)
|
||
|
|
{
|
||
|
|
struct aesbs_cbc_ctx *ctx = crypto_skcipher_ctx(tfm);
|
||
|
|
unsigned int reqsize;
|
||
|
|
|
||
|
|
ctx->enc_tfm = crypto_alloc_skcipher("cbc(aes)", 0, CRYPTO_ALG_ASYNC |
|
||
|
|
CRYPTO_ALG_NEED_FALLBACK);
|
||
|
|
if (IS_ERR(ctx->enc_tfm))
|
||
|
|
return PTR_ERR(ctx->enc_tfm);
|
||
|
|
|
||
|
|
reqsize = sizeof(struct skcipher_request);
|
||
|
|
reqsize += crypto_skcipher_reqsize(ctx->enc_tfm);
|
||
|
|
crypto_skcipher_set_reqsize(tfm, reqsize);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void cbc_exit(struct crypto_skcipher *tfm)
|
||
|
|
{
|
||
|
|
struct aesbs_cbc_ctx *ctx = crypto_skcipher_ctx(tfm);
|
||
|
|
|
||
|
|
crypto_free_skcipher(ctx->enc_tfm);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int aesbs_ctr_setkey_sync(struct crypto_skcipher *tfm, const u8 *in_key,
|
||
|
|
unsigned int key_len)
|
||
|
|
{
|
||
|
|
struct aesbs_ctr_ctx *ctx = crypto_skcipher_ctx(tfm);
|
||
|
|
int err;
|
||
|
|
|
||
|
|
err = aes_expandkey(&ctx->fallback, in_key, key_len);
|
||
|
|
if (err)
|
||
|
|
return err;
|
||
|
|
|
||
|
|
ctx->key.rounds = 6 + key_len / 4;
|
||
|
|
|
||
|
|
kernel_neon_begin();
|
||
|
|
aesbs_convert_key(ctx->key.rk, ctx->fallback.key_enc, ctx->key.rounds);
|
||
|
|
kernel_neon_end();
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int ctr_encrypt(struct skcipher_request *req)
|
||
|
|
{
|
||
|
|
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
|
||
|
|
struct aesbs_ctx *ctx = crypto_skcipher_ctx(tfm);
|
||
|
|
struct skcipher_walk walk;
|
||
|
|
u8 buf[AES_BLOCK_SIZE];
|
||
|
|
int err;
|
||
|
|
|
||
|
|
err = skcipher_walk_virt(&walk, req, false);
|
||
|
|
|
||
|
|
while (walk.nbytes > 0) {
|
||
|
|
const u8 *src = walk.src.virt.addr;
|
||
|
|
u8 *dst = walk.dst.virt.addr;
|
||
|
|
int bytes = walk.nbytes;
|
||
|
|
|
||
|
|
if (unlikely(bytes < AES_BLOCK_SIZE))
|
||
|
|
src = dst = memcpy(buf + sizeof(buf) - bytes,
|
||
|
|
src, bytes);
|
||
|
|
else if (walk.nbytes < walk.total)
|
||
|
|
bytes &= ~(8 * AES_BLOCK_SIZE - 1);
|
||
|
|
|
||
|
|
kernel_neon_begin();
|
||
|
|
aesbs_ctr_encrypt(dst, src, ctx->rk, ctx->rounds, bytes, walk.iv);
|
||
|
|
kernel_neon_end();
|
||
|
|
|
||
|
|
if (unlikely(bytes < AES_BLOCK_SIZE))
|
||
|
|
memcpy(walk.dst.virt.addr,
|
||
|
|
buf + sizeof(buf) - bytes, bytes);
|
||
|
|
|
||
|
|
err = skcipher_walk_done(&walk, walk.nbytes - bytes);
|
||
|
|
}
|
||
|
|
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void ctr_encrypt_one(struct crypto_skcipher *tfm, const u8 *src, u8 *dst)
|
||
|
|
{
|
||
|
|
struct aesbs_ctr_ctx *ctx = crypto_skcipher_ctx(tfm);
|
||
|
|
unsigned long flags;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Temporarily disable interrupts to avoid races where
|
||
|
|
* cachelines are evicted when the CPU is interrupted
|
||
|
|
* to do something else.
|
||
|
|
*/
|
||
|
|
local_irq_save(flags);
|
||
|
|
aes_encrypt(&ctx->fallback, dst, src);
|
||
|
|
local_irq_restore(flags);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int ctr_encrypt_sync(struct skcipher_request *req)
|
||
|
|
{
|
||
|
|
if (!crypto_simd_usable())
|
||
|
|
return crypto_ctr_encrypt_walk(req, ctr_encrypt_one);
|
||
|
|
|
||
|
|
return ctr_encrypt(req);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int aesbs_xts_setkey(struct crypto_skcipher *tfm, const u8 *in_key,
|
||
|
|
unsigned int key_len)
|
||
|
|
{
|
||
|
|
struct aesbs_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
|
||
|
|
int err;
|
||
|
|
|
||
|
|
err = xts_verify_key(tfm, in_key, key_len);
|
||
|
|
if (err)
|
||
|
|
return err;
|
||
|
|
|
||
|
|
key_len /= 2;
|
||
|
|
err = crypto_cipher_setkey(ctx->cts_tfm, in_key, key_len);
|
||
|
|
if (err)
|
||
|
|
return err;
|
||
|
|
err = crypto_cipher_setkey(ctx->tweak_tfm, in_key + key_len, key_len);
|
||
|
|
if (err)
|
||
|
|
return err;
|
||
|
|
|
||
|
|
return aesbs_setkey(tfm, in_key, key_len);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int xts_init(struct crypto_skcipher *tfm)
|
||
|
|
{
|
||
|
|
struct aesbs_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
|
||
|
|
|
||
|
|
ctx->cts_tfm = crypto_alloc_cipher("aes", 0, 0);
|
||
|
|
if (IS_ERR(ctx->cts_tfm))
|
||
|
|
return PTR_ERR(ctx->cts_tfm);
|
||
|
|
|
||
|
|
ctx->tweak_tfm = crypto_alloc_cipher("aes", 0, 0);
|
||
|
|
if (IS_ERR(ctx->tweak_tfm))
|
||
|
|
crypto_free_cipher(ctx->cts_tfm);
|
||
|
|
|
||
|
|
return PTR_ERR_OR_ZERO(ctx->tweak_tfm);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void xts_exit(struct crypto_skcipher *tfm)
|
||
|
|
{
|
||
|
|
struct aesbs_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
|
||
|
|
|
||
|
|
crypto_free_cipher(ctx->tweak_tfm);
|
||
|
|
crypto_free_cipher(ctx->cts_tfm);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int __xts_crypt(struct skcipher_request *req, bool encrypt,
|
||
|
|
void (*fn)(u8 out[], u8 const in[], u8 const rk[],
|
||
|
|
int rounds, int blocks, u8 iv[], int))
|
||
|
|
{
|
||
|
|
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
|
||
|
|
struct aesbs_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
|
||
|
|
int tail = req->cryptlen % AES_BLOCK_SIZE;
|
||
|
|
struct skcipher_request subreq;
|
||
|
|
u8 buf[2 * AES_BLOCK_SIZE];
|
||
|
|
struct skcipher_walk walk;
|
||
|
|
int err;
|
||
|
|
|
||
|
|
if (req->cryptlen < AES_BLOCK_SIZE)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
if (unlikely(tail)) {
|
||
|
|
skcipher_request_set_tfm(&subreq, tfm);
|
||
|
|
skcipher_request_set_callback(&subreq,
|
||
|
|
skcipher_request_flags(req),
|
||
|
|
NULL, NULL);
|
||
|
|
skcipher_request_set_crypt(&subreq, req->src, req->dst,
|
||
|
|
req->cryptlen - tail, req->iv);
|
||
|
|
req = &subreq;
|
||
|
|
}
|
||
|
|
|
||
|
|
err = skcipher_walk_virt(&walk, req, true);
|
||
|
|
if (err)
|
||
|
|
return err;
|
||
|
|
|
||
|
|
crypto_cipher_encrypt_one(ctx->tweak_tfm, walk.iv, walk.iv);
|
||
|
|
|
||
|
|
while (walk.nbytes >= AES_BLOCK_SIZE) {
|
||
|
|
unsigned int blocks = walk.nbytes / AES_BLOCK_SIZE;
|
||
|
|
int reorder_last_tweak = !encrypt && tail > 0;
|
||
|
|
|
||
|
|
if (walk.nbytes < walk.total) {
|
||
|
|
blocks = round_down(blocks,
|
||
|
|
walk.stride / AES_BLOCK_SIZE);
|
||
|
|
reorder_last_tweak = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
kernel_neon_begin();
|
||
|
|
fn(walk.dst.virt.addr, walk.src.virt.addr, ctx->key.rk,
|
||
|
|
ctx->key.rounds, blocks, walk.iv, reorder_last_tweak);
|
||
|
|
kernel_neon_end();
|
||
|
|
err = skcipher_walk_done(&walk,
|
||
|
|
walk.nbytes - blocks * AES_BLOCK_SIZE);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (err || likely(!tail))
|
||
|
|
return err;
|
||
|
|
|
||
|
|
/* handle ciphertext stealing */
|
||
|
|
scatterwalk_map_and_copy(buf, req->dst, req->cryptlen - AES_BLOCK_SIZE,
|
||
|
|
AES_BLOCK_SIZE, 0);
|
||
|
|
memcpy(buf + AES_BLOCK_SIZE, buf, tail);
|
||
|
|
scatterwalk_map_and_copy(buf, req->src, req->cryptlen, tail, 0);
|
||
|
|
|
||
|
|
crypto_xor(buf, req->iv, AES_BLOCK_SIZE);
|
||
|
|
|
||
|
|
if (encrypt)
|
||
|
|
crypto_cipher_encrypt_one(ctx->cts_tfm, buf, buf);
|
||
|
|
else
|
||
|
|
crypto_cipher_decrypt_one(ctx->cts_tfm, buf, buf);
|
||
|
|
|
||
|
|
crypto_xor(buf, req->iv, AES_BLOCK_SIZE);
|
||
|
|
|
||
|
|
scatterwalk_map_and_copy(buf, req->dst, req->cryptlen - AES_BLOCK_SIZE,
|
||
|
|
AES_BLOCK_SIZE + tail, 1);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int xts_encrypt(struct skcipher_request *req)
|
||
|
|
{
|
||
|
|
return __xts_crypt(req, true, aesbs_xts_encrypt);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int xts_decrypt(struct skcipher_request *req)
|
||
|
|
{
|
||
|
|
return __xts_crypt(req, false, aesbs_xts_decrypt);
|
||
|
|
}
|
||
|
|
|
||
|
|
static struct skcipher_alg aes_algs[] = { {
|
||
|
|
.base.cra_name = "__ecb(aes)",
|
||
|
|
.base.cra_driver_name = "__ecb-aes-neonbs",
|
||
|
|
.base.cra_priority = 250,
|
||
|
|
.base.cra_blocksize = AES_BLOCK_SIZE,
|
||
|
|
.base.cra_ctxsize = sizeof(struct aesbs_ctx),
|
||
|
|
.base.cra_module = THIS_MODULE,
|
||
|
|
.base.cra_flags = CRYPTO_ALG_INTERNAL,
|
||
|
|
|
||
|
|
.min_keysize = AES_MIN_KEY_SIZE,
|
||
|
|
.max_keysize = AES_MAX_KEY_SIZE,
|
||
|
|
.walksize = 8 * AES_BLOCK_SIZE,
|
||
|
|
.setkey = aesbs_setkey,
|
||
|
|
.encrypt = ecb_encrypt,
|
||
|
|
.decrypt = ecb_decrypt,
|
||
|
|
}, {
|
||
|
|
.base.cra_name = "__cbc(aes)",
|
||
|
|
.base.cra_driver_name = "__cbc-aes-neonbs",
|
||
|
|
.base.cra_priority = 250,
|
||
|
|
.base.cra_blocksize = AES_BLOCK_SIZE,
|
||
|
|
.base.cra_ctxsize = sizeof(struct aesbs_cbc_ctx),
|
||
|
|
.base.cra_module = THIS_MODULE,
|
||
|
|
.base.cra_flags = CRYPTO_ALG_INTERNAL |
|
||
|
|
CRYPTO_ALG_NEED_FALLBACK,
|
||
|
|
|
||
|
|
.min_keysize = AES_MIN_KEY_SIZE,
|
||
|
|
.max_keysize = AES_MAX_KEY_SIZE,
|
||
|
|
.walksize = 8 * AES_BLOCK_SIZE,
|
||
|
|
.ivsize = AES_BLOCK_SIZE,
|
||
|
|
.setkey = aesbs_cbc_setkey,
|
||
|
|
.encrypt = cbc_encrypt,
|
||
|
|
.decrypt = cbc_decrypt,
|
||
|
|
.init = cbc_init,
|
||
|
|
.exit = cbc_exit,
|
||
|
|
}, {
|
||
|
|
.base.cra_name = "__ctr(aes)",
|
||
|
|
.base.cra_driver_name = "__ctr-aes-neonbs",
|
||
|
|
.base.cra_priority = 250,
|
||
|
|
.base.cra_blocksize = 1,
|
||
|
|
.base.cra_ctxsize = sizeof(struct aesbs_ctx),
|
||
|
|
.base.cra_module = THIS_MODULE,
|
||
|
|
.base.cra_flags = CRYPTO_ALG_INTERNAL,
|
||
|
|
|
||
|
|
.min_keysize = AES_MIN_KEY_SIZE,
|
||
|
|
.max_keysize = AES_MAX_KEY_SIZE,
|
||
|
|
.chunksize = AES_BLOCK_SIZE,
|
||
|
|
.walksize = 8 * AES_BLOCK_SIZE,
|
||
|
|
.ivsize = AES_BLOCK_SIZE,
|
||
|
|
.setkey = aesbs_setkey,
|
||
|
|
.encrypt = ctr_encrypt,
|
||
|
|
.decrypt = ctr_encrypt,
|
||
|
|
}, {
|
||
|
|
.base.cra_name = "ctr(aes)",
|
||
|
|
.base.cra_driver_name = "ctr-aes-neonbs-sync",
|
||
|
|
.base.cra_priority = 250 - 1,
|
||
|
|
.base.cra_blocksize = 1,
|
||
|
|
.base.cra_ctxsize = sizeof(struct aesbs_ctr_ctx),
|
||
|
|
.base.cra_module = THIS_MODULE,
|
||
|
|
|
||
|
|
.min_keysize = AES_MIN_KEY_SIZE,
|
||
|
|
.max_keysize = AES_MAX_KEY_SIZE,
|
||
|
|
.chunksize = AES_BLOCK_SIZE,
|
||
|
|
.walksize = 8 * AES_BLOCK_SIZE,
|
||
|
|
.ivsize = AES_BLOCK_SIZE,
|
||
|
|
.setkey = aesbs_ctr_setkey_sync,
|
||
|
|
.encrypt = ctr_encrypt_sync,
|
||
|
|
.decrypt = ctr_encrypt_sync,
|
||
|
|
}, {
|
||
|
|
.base.cra_name = "__xts(aes)",
|
||
|
|
.base.cra_driver_name = "__xts-aes-neonbs",
|
||
|
|
.base.cra_priority = 250,
|
||
|
|
.base.cra_blocksize = AES_BLOCK_SIZE,
|
||
|
|
.base.cra_ctxsize = sizeof(struct aesbs_xts_ctx),
|
||
|
|
.base.cra_module = THIS_MODULE,
|
||
|
|
.base.cra_flags = CRYPTO_ALG_INTERNAL,
|
||
|
|
|
||
|
|
.min_keysize = 2 * AES_MIN_KEY_SIZE,
|
||
|
|
.max_keysize = 2 * AES_MAX_KEY_SIZE,
|
||
|
|
.walksize = 8 * AES_BLOCK_SIZE,
|
||
|
|
.ivsize = AES_BLOCK_SIZE,
|
||
|
|
.setkey = aesbs_xts_setkey,
|
||
|
|
.encrypt = xts_encrypt,
|
||
|
|
.decrypt = xts_decrypt,
|
||
|
|
.init = xts_init,
|
||
|
|
.exit = xts_exit,
|
||
|
|
} };
|
||
|
|
|
||
|
|
static struct simd_skcipher_alg *aes_simd_algs[ARRAY_SIZE(aes_algs)];
|
||
|
|
|
||
|
|
static void aes_exit(void)
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
|
||
|
|
for (i = 0; i < ARRAY_SIZE(aes_simd_algs); i++)
|
||
|
|
if (aes_simd_algs[i])
|
||
|
|
simd_skcipher_free(aes_simd_algs[i]);
|
||
|
|
|
||
|
|
crypto_unregister_skciphers(aes_algs, ARRAY_SIZE(aes_algs));
|
||
|
|
}
|
||
|
|
|
||
|
|
static int __init aes_init(void)
|
||
|
|
{
|
||
|
|
struct simd_skcipher_alg *simd;
|
||
|
|
const char *basename;
|
||
|
|
const char *algname;
|
||
|
|
const char *drvname;
|
||
|
|
int err;
|
||
|
|
int i;
|
||
|
|
|
||
|
|
if (!(elf_hwcap & HWCAP_NEON))
|
||
|
|
return -ENODEV;
|
||
|
|
|
||
|
|
err = crypto_register_skciphers(aes_algs, ARRAY_SIZE(aes_algs));
|
||
|
|
if (err)
|
||
|
|
return err;
|
||
|
|
|
||
|
|
for (i = 0; i < ARRAY_SIZE(aes_algs); i++) {
|
||
|
|
if (!(aes_algs[i].base.cra_flags & CRYPTO_ALG_INTERNAL))
|
||
|
|
continue;
|
||
|
|
|
||
|
|
algname = aes_algs[i].base.cra_name + 2;
|
||
|
|
drvname = aes_algs[i].base.cra_driver_name + 2;
|
||
|
|
basename = aes_algs[i].base.cra_driver_name;
|
||
|
|
simd = simd_skcipher_create_compat(algname, drvname, basename);
|
||
|
|
err = PTR_ERR(simd);
|
||
|
|
if (IS_ERR(simd))
|
||
|
|
goto unregister_simds;
|
||
|
|
|
||
|
|
aes_simd_algs[i] = simd;
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
unregister_simds:
|
||
|
|
aes_exit();
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
late_initcall(aes_init);
|
||
|
|
module_exit(aes_exit);
|