mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-06 02:24:14 +08:00
f1d087b912
crypto/aegis.h:27:32: warning: crypto_aegis_const defined but not used [-Wunused-const-variable=] crypto_aegis_const is only used in aegis128-core.c, just move the definition over there. Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: YueHaibing <yuehaibing@huawei.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
503 lines
13 KiB
C
503 lines
13 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* The AEGIS-128 Authenticated-Encryption Algorithm
|
|
*
|
|
* Copyright (c) 2017-2018 Ondrej Mosnacek <omosnacek@gmail.com>
|
|
* Copyright (C) 2017-2018 Red Hat, Inc. All rights reserved.
|
|
*/
|
|
|
|
#include <crypto/algapi.h>
|
|
#include <crypto/internal/aead.h>
|
|
#include <crypto/internal/simd.h>
|
|
#include <crypto/internal/skcipher.h>
|
|
#include <crypto/scatterwalk.h>
|
|
#include <linux/err.h>
|
|
#include <linux/init.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/scatterlist.h>
|
|
|
|
#include <asm/simd.h>
|
|
|
|
#include "aegis.h"
|
|
|
|
#define AEGIS128_NONCE_SIZE 16
|
|
#define AEGIS128_STATE_BLOCKS 5
|
|
#define AEGIS128_KEY_SIZE 16
|
|
#define AEGIS128_MIN_AUTH_SIZE 8
|
|
#define AEGIS128_MAX_AUTH_SIZE 16
|
|
|
|
struct aegis_state {
|
|
union aegis_block blocks[AEGIS128_STATE_BLOCKS];
|
|
};
|
|
|
|
struct aegis_ctx {
|
|
union aegis_block key;
|
|
};
|
|
|
|
struct aegis128_ops {
|
|
int (*skcipher_walk_init)(struct skcipher_walk *walk,
|
|
struct aead_request *req, bool atomic);
|
|
|
|
void (*crypt_chunk)(struct aegis_state *state, u8 *dst,
|
|
const u8 *src, unsigned int size);
|
|
};
|
|
|
|
static bool have_simd;
|
|
|
|
static const union aegis_block crypto_aegis_const[2] = {
|
|
{ .words64 = {
|
|
cpu_to_le64(U64_C(0x0d08050302010100)),
|
|
cpu_to_le64(U64_C(0x6279e99059372215)),
|
|
} },
|
|
{ .words64 = {
|
|
cpu_to_le64(U64_C(0xf12fc26d55183ddb)),
|
|
cpu_to_le64(U64_C(0xdd28b57342311120)),
|
|
} },
|
|
};
|
|
|
|
static bool aegis128_do_simd(void)
|
|
{
|
|
#ifdef CONFIG_CRYPTO_AEGIS128_SIMD
|
|
if (have_simd)
|
|
return crypto_simd_usable();
|
|
#endif
|
|
return false;
|
|
}
|
|
|
|
bool crypto_aegis128_have_simd(void);
|
|
void crypto_aegis128_update_simd(struct aegis_state *state, const void *msg);
|
|
void crypto_aegis128_encrypt_chunk_simd(struct aegis_state *state, u8 *dst,
|
|
const u8 *src, unsigned int size);
|
|
void crypto_aegis128_decrypt_chunk_simd(struct aegis_state *state, u8 *dst,
|
|
const u8 *src, unsigned int size);
|
|
|
|
static void crypto_aegis128_update(struct aegis_state *state)
|
|
{
|
|
union aegis_block tmp;
|
|
unsigned int i;
|
|
|
|
tmp = state->blocks[AEGIS128_STATE_BLOCKS - 1];
|
|
for (i = AEGIS128_STATE_BLOCKS - 1; i > 0; i--)
|
|
crypto_aegis_aesenc(&state->blocks[i], &state->blocks[i - 1],
|
|
&state->blocks[i]);
|
|
crypto_aegis_aesenc(&state->blocks[0], &tmp, &state->blocks[0]);
|
|
}
|
|
|
|
static void crypto_aegis128_update_a(struct aegis_state *state,
|
|
const union aegis_block *msg)
|
|
{
|
|
if (aegis128_do_simd()) {
|
|
crypto_aegis128_update_simd(state, msg);
|
|
return;
|
|
}
|
|
|
|
crypto_aegis128_update(state);
|
|
crypto_aegis_block_xor(&state->blocks[0], msg);
|
|
}
|
|
|
|
static void crypto_aegis128_update_u(struct aegis_state *state, const void *msg)
|
|
{
|
|
if (aegis128_do_simd()) {
|
|
crypto_aegis128_update_simd(state, msg);
|
|
return;
|
|
}
|
|
|
|
crypto_aegis128_update(state);
|
|
crypto_xor(state->blocks[0].bytes, msg, AEGIS_BLOCK_SIZE);
|
|
}
|
|
|
|
static void crypto_aegis128_init(struct aegis_state *state,
|
|
const union aegis_block *key,
|
|
const u8 *iv)
|
|
{
|
|
union aegis_block key_iv;
|
|
unsigned int i;
|
|
|
|
key_iv = *key;
|
|
crypto_xor(key_iv.bytes, iv, AEGIS_BLOCK_SIZE);
|
|
|
|
state->blocks[0] = key_iv;
|
|
state->blocks[1] = crypto_aegis_const[1];
|
|
state->blocks[2] = crypto_aegis_const[0];
|
|
state->blocks[3] = *key;
|
|
state->blocks[4] = *key;
|
|
|
|
crypto_aegis_block_xor(&state->blocks[3], &crypto_aegis_const[0]);
|
|
crypto_aegis_block_xor(&state->blocks[4], &crypto_aegis_const[1]);
|
|
|
|
for (i = 0; i < 5; i++) {
|
|
crypto_aegis128_update_a(state, key);
|
|
crypto_aegis128_update_a(state, &key_iv);
|
|
}
|
|
}
|
|
|
|
static void crypto_aegis128_ad(struct aegis_state *state,
|
|
const u8 *src, unsigned int size)
|
|
{
|
|
if (AEGIS_ALIGNED(src)) {
|
|
const union aegis_block *src_blk =
|
|
(const union aegis_block *)src;
|
|
|
|
while (size >= AEGIS_BLOCK_SIZE) {
|
|
crypto_aegis128_update_a(state, src_blk);
|
|
|
|
size -= AEGIS_BLOCK_SIZE;
|
|
src_blk++;
|
|
}
|
|
} else {
|
|
while (size >= AEGIS_BLOCK_SIZE) {
|
|
crypto_aegis128_update_u(state, src);
|
|
|
|
size -= AEGIS_BLOCK_SIZE;
|
|
src += AEGIS_BLOCK_SIZE;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void crypto_aegis128_encrypt_chunk(struct aegis_state *state, u8 *dst,
|
|
const u8 *src, unsigned int size)
|
|
{
|
|
union aegis_block tmp;
|
|
|
|
if (AEGIS_ALIGNED(src) && AEGIS_ALIGNED(dst)) {
|
|
while (size >= AEGIS_BLOCK_SIZE) {
|
|
union aegis_block *dst_blk =
|
|
(union aegis_block *)dst;
|
|
const union aegis_block *src_blk =
|
|
(const union aegis_block *)src;
|
|
|
|
tmp = state->blocks[2];
|
|
crypto_aegis_block_and(&tmp, &state->blocks[3]);
|
|
crypto_aegis_block_xor(&tmp, &state->blocks[4]);
|
|
crypto_aegis_block_xor(&tmp, &state->blocks[1]);
|
|
crypto_aegis_block_xor(&tmp, src_blk);
|
|
|
|
crypto_aegis128_update_a(state, src_blk);
|
|
|
|
*dst_blk = tmp;
|
|
|
|
size -= AEGIS_BLOCK_SIZE;
|
|
src += AEGIS_BLOCK_SIZE;
|
|
dst += AEGIS_BLOCK_SIZE;
|
|
}
|
|
} else {
|
|
while (size >= AEGIS_BLOCK_SIZE) {
|
|
tmp = state->blocks[2];
|
|
crypto_aegis_block_and(&tmp, &state->blocks[3]);
|
|
crypto_aegis_block_xor(&tmp, &state->blocks[4]);
|
|
crypto_aegis_block_xor(&tmp, &state->blocks[1]);
|
|
crypto_xor(tmp.bytes, src, AEGIS_BLOCK_SIZE);
|
|
|
|
crypto_aegis128_update_u(state, src);
|
|
|
|
memcpy(dst, tmp.bytes, AEGIS_BLOCK_SIZE);
|
|
|
|
size -= AEGIS_BLOCK_SIZE;
|
|
src += AEGIS_BLOCK_SIZE;
|
|
dst += AEGIS_BLOCK_SIZE;
|
|
}
|
|
}
|
|
|
|
if (size > 0) {
|
|
union aegis_block msg = {};
|
|
memcpy(msg.bytes, src, size);
|
|
|
|
tmp = state->blocks[2];
|
|
crypto_aegis_block_and(&tmp, &state->blocks[3]);
|
|
crypto_aegis_block_xor(&tmp, &state->blocks[4]);
|
|
crypto_aegis_block_xor(&tmp, &state->blocks[1]);
|
|
|
|
crypto_aegis128_update_a(state, &msg);
|
|
|
|
crypto_aegis_block_xor(&msg, &tmp);
|
|
|
|
memcpy(dst, msg.bytes, size);
|
|
}
|
|
}
|
|
|
|
static void crypto_aegis128_decrypt_chunk(struct aegis_state *state, u8 *dst,
|
|
const u8 *src, unsigned int size)
|
|
{
|
|
union aegis_block tmp;
|
|
|
|
if (AEGIS_ALIGNED(src) && AEGIS_ALIGNED(dst)) {
|
|
while (size >= AEGIS_BLOCK_SIZE) {
|
|
union aegis_block *dst_blk =
|
|
(union aegis_block *)dst;
|
|
const union aegis_block *src_blk =
|
|
(const union aegis_block *)src;
|
|
|
|
tmp = state->blocks[2];
|
|
crypto_aegis_block_and(&tmp, &state->blocks[3]);
|
|
crypto_aegis_block_xor(&tmp, &state->blocks[4]);
|
|
crypto_aegis_block_xor(&tmp, &state->blocks[1]);
|
|
crypto_aegis_block_xor(&tmp, src_blk);
|
|
|
|
crypto_aegis128_update_a(state, &tmp);
|
|
|
|
*dst_blk = tmp;
|
|
|
|
size -= AEGIS_BLOCK_SIZE;
|
|
src += AEGIS_BLOCK_SIZE;
|
|
dst += AEGIS_BLOCK_SIZE;
|
|
}
|
|
} else {
|
|
while (size >= AEGIS_BLOCK_SIZE) {
|
|
tmp = state->blocks[2];
|
|
crypto_aegis_block_and(&tmp, &state->blocks[3]);
|
|
crypto_aegis_block_xor(&tmp, &state->blocks[4]);
|
|
crypto_aegis_block_xor(&tmp, &state->blocks[1]);
|
|
crypto_xor(tmp.bytes, src, AEGIS_BLOCK_SIZE);
|
|
|
|
crypto_aegis128_update_a(state, &tmp);
|
|
|
|
memcpy(dst, tmp.bytes, AEGIS_BLOCK_SIZE);
|
|
|
|
size -= AEGIS_BLOCK_SIZE;
|
|
src += AEGIS_BLOCK_SIZE;
|
|
dst += AEGIS_BLOCK_SIZE;
|
|
}
|
|
}
|
|
|
|
if (size > 0) {
|
|
union aegis_block msg = {};
|
|
memcpy(msg.bytes, src, size);
|
|
|
|
tmp = state->blocks[2];
|
|
crypto_aegis_block_and(&tmp, &state->blocks[3]);
|
|
crypto_aegis_block_xor(&tmp, &state->blocks[4]);
|
|
crypto_aegis_block_xor(&tmp, &state->blocks[1]);
|
|
crypto_aegis_block_xor(&msg, &tmp);
|
|
|
|
memset(msg.bytes + size, 0, AEGIS_BLOCK_SIZE - size);
|
|
|
|
crypto_aegis128_update_a(state, &msg);
|
|
|
|
memcpy(dst, msg.bytes, size);
|
|
}
|
|
}
|
|
|
|
static void crypto_aegis128_process_ad(struct aegis_state *state,
|
|
struct scatterlist *sg_src,
|
|
unsigned int assoclen)
|
|
{
|
|
struct scatter_walk walk;
|
|
union aegis_block buf;
|
|
unsigned int pos = 0;
|
|
|
|
scatterwalk_start(&walk, sg_src);
|
|
while (assoclen != 0) {
|
|
unsigned int size = scatterwalk_clamp(&walk, assoclen);
|
|
unsigned int left = size;
|
|
void *mapped = scatterwalk_map(&walk);
|
|
const u8 *src = (const u8 *)mapped;
|
|
|
|
if (pos + size >= AEGIS_BLOCK_SIZE) {
|
|
if (pos > 0) {
|
|
unsigned int fill = AEGIS_BLOCK_SIZE - pos;
|
|
memcpy(buf.bytes + pos, src, fill);
|
|
crypto_aegis128_update_a(state, &buf);
|
|
pos = 0;
|
|
left -= fill;
|
|
src += fill;
|
|
}
|
|
|
|
crypto_aegis128_ad(state, src, left);
|
|
src += left & ~(AEGIS_BLOCK_SIZE - 1);
|
|
left &= AEGIS_BLOCK_SIZE - 1;
|
|
}
|
|
|
|
memcpy(buf.bytes + pos, src, left);
|
|
|
|
pos += left;
|
|
assoclen -= size;
|
|
scatterwalk_unmap(mapped);
|
|
scatterwalk_advance(&walk, size);
|
|
scatterwalk_done(&walk, 0, assoclen);
|
|
}
|
|
|
|
if (pos > 0) {
|
|
memset(buf.bytes + pos, 0, AEGIS_BLOCK_SIZE - pos);
|
|
crypto_aegis128_update_a(state, &buf);
|
|
}
|
|
}
|
|
|
|
static void crypto_aegis128_process_crypt(struct aegis_state *state,
|
|
struct aead_request *req,
|
|
const struct aegis128_ops *ops)
|
|
{
|
|
struct skcipher_walk walk;
|
|
|
|
ops->skcipher_walk_init(&walk, req, false);
|
|
|
|
while (walk.nbytes) {
|
|
unsigned int nbytes = walk.nbytes;
|
|
|
|
if (nbytes < walk.total)
|
|
nbytes = round_down(nbytes, walk.stride);
|
|
|
|
ops->crypt_chunk(state, walk.dst.virt.addr, walk.src.virt.addr,
|
|
nbytes);
|
|
|
|
skcipher_walk_done(&walk, walk.nbytes - nbytes);
|
|
}
|
|
}
|
|
|
|
static void crypto_aegis128_final(struct aegis_state *state,
|
|
union aegis_block *tag_xor,
|
|
u64 assoclen, u64 cryptlen)
|
|
{
|
|
u64 assocbits = assoclen * 8;
|
|
u64 cryptbits = cryptlen * 8;
|
|
|
|
union aegis_block tmp;
|
|
unsigned int i;
|
|
|
|
tmp.words64[0] = cpu_to_le64(assocbits);
|
|
tmp.words64[1] = cpu_to_le64(cryptbits);
|
|
|
|
crypto_aegis_block_xor(&tmp, &state->blocks[3]);
|
|
|
|
for (i = 0; i < 7; i++)
|
|
crypto_aegis128_update_a(state, &tmp);
|
|
|
|
for (i = 0; i < AEGIS128_STATE_BLOCKS; i++)
|
|
crypto_aegis_block_xor(tag_xor, &state->blocks[i]);
|
|
}
|
|
|
|
static int crypto_aegis128_setkey(struct crypto_aead *aead, const u8 *key,
|
|
unsigned int keylen)
|
|
{
|
|
struct aegis_ctx *ctx = crypto_aead_ctx(aead);
|
|
|
|
if (keylen != AEGIS128_KEY_SIZE) {
|
|
crypto_aead_set_flags(aead, CRYPTO_TFM_RES_BAD_KEY_LEN);
|
|
return -EINVAL;
|
|
}
|
|
|
|
memcpy(ctx->key.bytes, key, AEGIS128_KEY_SIZE);
|
|
return 0;
|
|
}
|
|
|
|
static int crypto_aegis128_setauthsize(struct crypto_aead *tfm,
|
|
unsigned int authsize)
|
|
{
|
|
if (authsize > AEGIS128_MAX_AUTH_SIZE)
|
|
return -EINVAL;
|
|
if (authsize < AEGIS128_MIN_AUTH_SIZE)
|
|
return -EINVAL;
|
|
return 0;
|
|
}
|
|
|
|
static void crypto_aegis128_crypt(struct aead_request *req,
|
|
union aegis_block *tag_xor,
|
|
unsigned int cryptlen,
|
|
const struct aegis128_ops *ops)
|
|
{
|
|
struct crypto_aead *tfm = crypto_aead_reqtfm(req);
|
|
struct aegis_ctx *ctx = crypto_aead_ctx(tfm);
|
|
struct aegis_state state;
|
|
|
|
crypto_aegis128_init(&state, &ctx->key, req->iv);
|
|
crypto_aegis128_process_ad(&state, req->src, req->assoclen);
|
|
crypto_aegis128_process_crypt(&state, req, ops);
|
|
crypto_aegis128_final(&state, tag_xor, req->assoclen, cryptlen);
|
|
}
|
|
|
|
static int crypto_aegis128_encrypt(struct aead_request *req)
|
|
{
|
|
const struct aegis128_ops *ops = &(struct aegis128_ops){
|
|
.skcipher_walk_init = skcipher_walk_aead_encrypt,
|
|
.crypt_chunk = crypto_aegis128_encrypt_chunk,
|
|
};
|
|
|
|
struct crypto_aead *tfm = crypto_aead_reqtfm(req);
|
|
union aegis_block tag = {};
|
|
unsigned int authsize = crypto_aead_authsize(tfm);
|
|
unsigned int cryptlen = req->cryptlen;
|
|
|
|
if (aegis128_do_simd())
|
|
ops = &(struct aegis128_ops){
|
|
.skcipher_walk_init = skcipher_walk_aead_encrypt,
|
|
.crypt_chunk = crypto_aegis128_encrypt_chunk_simd };
|
|
|
|
crypto_aegis128_crypt(req, &tag, cryptlen, ops);
|
|
|
|
scatterwalk_map_and_copy(tag.bytes, req->dst, req->assoclen + cryptlen,
|
|
authsize, 1);
|
|
return 0;
|
|
}
|
|
|
|
static int crypto_aegis128_decrypt(struct aead_request *req)
|
|
{
|
|
const struct aegis128_ops *ops = &(struct aegis128_ops){
|
|
.skcipher_walk_init = skcipher_walk_aead_decrypt,
|
|
.crypt_chunk = crypto_aegis128_decrypt_chunk,
|
|
};
|
|
static const u8 zeros[AEGIS128_MAX_AUTH_SIZE] = {};
|
|
|
|
struct crypto_aead *tfm = crypto_aead_reqtfm(req);
|
|
union aegis_block tag;
|
|
unsigned int authsize = crypto_aead_authsize(tfm);
|
|
unsigned int cryptlen = req->cryptlen - authsize;
|
|
|
|
scatterwalk_map_and_copy(tag.bytes, req->src, req->assoclen + cryptlen,
|
|
authsize, 0);
|
|
|
|
if (aegis128_do_simd())
|
|
ops = &(struct aegis128_ops){
|
|
.skcipher_walk_init = skcipher_walk_aead_decrypt,
|
|
.crypt_chunk = crypto_aegis128_decrypt_chunk_simd };
|
|
|
|
crypto_aegis128_crypt(req, &tag, cryptlen, ops);
|
|
|
|
return crypto_memneq(tag.bytes, zeros, authsize) ? -EBADMSG : 0;
|
|
}
|
|
|
|
static struct aead_alg crypto_aegis128_alg = {
|
|
.setkey = crypto_aegis128_setkey,
|
|
.setauthsize = crypto_aegis128_setauthsize,
|
|
.encrypt = crypto_aegis128_encrypt,
|
|
.decrypt = crypto_aegis128_decrypt,
|
|
|
|
.ivsize = AEGIS128_NONCE_SIZE,
|
|
.maxauthsize = AEGIS128_MAX_AUTH_SIZE,
|
|
.chunksize = AEGIS_BLOCK_SIZE,
|
|
|
|
.base = {
|
|
.cra_blocksize = 1,
|
|
.cra_ctxsize = sizeof(struct aegis_ctx),
|
|
.cra_alignmask = 0,
|
|
|
|
.cra_priority = 100,
|
|
|
|
.cra_name = "aegis128",
|
|
.cra_driver_name = "aegis128-generic",
|
|
|
|
.cra_module = THIS_MODULE,
|
|
}
|
|
};
|
|
|
|
static int __init crypto_aegis128_module_init(void)
|
|
{
|
|
if (IS_ENABLED(CONFIG_CRYPTO_AEGIS128_SIMD))
|
|
have_simd = crypto_aegis128_have_simd();
|
|
|
|
return crypto_register_aead(&crypto_aegis128_alg);
|
|
}
|
|
|
|
static void __exit crypto_aegis128_module_exit(void)
|
|
{
|
|
crypto_unregister_aead(&crypto_aegis128_alg);
|
|
}
|
|
|
|
subsys_initcall(crypto_aegis128_module_init);
|
|
module_exit(crypto_aegis128_module_exit);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Ondrej Mosnacek <omosnacek@gmail.com>");
|
|
MODULE_DESCRIPTION("AEGIS-128 AEAD algorithm");
|
|
MODULE_ALIAS_CRYPTO("aegis128");
|
|
MODULE_ALIAS_CRYPTO("aegis128-generic");
|