488 lines
12 KiB
C
488 lines
12 KiB
C
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/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* SM4 Cipher Algorithm, AES-NI/AVX optimized.
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* as specified in
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* https://tools.ietf.org/id/draft-ribose-cfrg-sm4-10.html
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*
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* Copyright (c) 2021, Alibaba Group.
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* Copyright (c) 2021 Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
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*/
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#include <linux/module.h>
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#include <linux/crypto.h>
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#include <linux/kernel.h>
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#include <asm/simd.h>
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#include <crypto/internal/simd.h>
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#include <crypto/internal/skcipher.h>
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#include <crypto/sm4.h>
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#include "sm4-avx.h"
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#define SM4_CRYPT8_BLOCK_SIZE (SM4_BLOCK_SIZE * 8)
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asmlinkage void sm4_aesni_avx_crypt4(const u32 *rk, u8 *dst,
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const u8 *src, int nblocks);
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asmlinkage void sm4_aesni_avx_crypt8(const u32 *rk, u8 *dst,
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const u8 *src, int nblocks);
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asmlinkage void sm4_aesni_avx_ctr_enc_blk8(const u32 *rk, u8 *dst,
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const u8 *src, u8 *iv);
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asmlinkage void sm4_aesni_avx_cbc_dec_blk8(const u32 *rk, u8 *dst,
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const u8 *src, u8 *iv);
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asmlinkage void sm4_aesni_avx_cfb_dec_blk8(const u32 *rk, u8 *dst,
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const u8 *src, u8 *iv);
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static int sm4_skcipher_setkey(struct crypto_skcipher *tfm, const u8 *key,
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unsigned int key_len)
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{
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struct sm4_ctx *ctx = crypto_skcipher_ctx(tfm);
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return sm4_expandkey(ctx, key, key_len);
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}
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static int ecb_do_crypt(struct skcipher_request *req, const u32 *rkey)
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{
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struct skcipher_walk walk;
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unsigned int nbytes;
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int err;
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err = skcipher_walk_virt(&walk, req, false);
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while ((nbytes = walk.nbytes) > 0) {
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const u8 *src = walk.src.virt.addr;
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u8 *dst = walk.dst.virt.addr;
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kernel_fpu_begin();
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while (nbytes >= SM4_CRYPT8_BLOCK_SIZE) {
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sm4_aesni_avx_crypt8(rkey, dst, src, 8);
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dst += SM4_CRYPT8_BLOCK_SIZE;
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src += SM4_CRYPT8_BLOCK_SIZE;
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nbytes -= SM4_CRYPT8_BLOCK_SIZE;
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}
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while (nbytes >= SM4_BLOCK_SIZE) {
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unsigned int nblocks = min(nbytes >> 4, 4u);
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sm4_aesni_avx_crypt4(rkey, dst, src, nblocks);
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dst += nblocks * SM4_BLOCK_SIZE;
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src += nblocks * SM4_BLOCK_SIZE;
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nbytes -= nblocks * SM4_BLOCK_SIZE;
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}
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kernel_fpu_end();
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err = skcipher_walk_done(&walk, nbytes);
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}
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return err;
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}
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int sm4_avx_ecb_encrypt(struct skcipher_request *req)
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{
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struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
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struct sm4_ctx *ctx = crypto_skcipher_ctx(tfm);
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return ecb_do_crypt(req, ctx->rkey_enc);
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}
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EXPORT_SYMBOL_GPL(sm4_avx_ecb_encrypt);
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int sm4_avx_ecb_decrypt(struct skcipher_request *req)
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{
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struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
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struct sm4_ctx *ctx = crypto_skcipher_ctx(tfm);
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return ecb_do_crypt(req, ctx->rkey_dec);
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}
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EXPORT_SYMBOL_GPL(sm4_avx_ecb_decrypt);
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int sm4_cbc_encrypt(struct skcipher_request *req)
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{
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struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
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struct sm4_ctx *ctx = crypto_skcipher_ctx(tfm);
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struct skcipher_walk walk;
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unsigned int nbytes;
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int err;
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err = skcipher_walk_virt(&walk, req, false);
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while ((nbytes = walk.nbytes) > 0) {
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const u8 *iv = walk.iv;
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const u8 *src = walk.src.virt.addr;
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u8 *dst = walk.dst.virt.addr;
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while (nbytes >= SM4_BLOCK_SIZE) {
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crypto_xor_cpy(dst, src, iv, SM4_BLOCK_SIZE);
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sm4_crypt_block(ctx->rkey_enc, dst, dst);
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iv = dst;
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src += SM4_BLOCK_SIZE;
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dst += SM4_BLOCK_SIZE;
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nbytes -= SM4_BLOCK_SIZE;
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}
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if (iv != walk.iv)
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memcpy(walk.iv, iv, SM4_BLOCK_SIZE);
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err = skcipher_walk_done(&walk, nbytes);
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}
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return err;
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}
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EXPORT_SYMBOL_GPL(sm4_cbc_encrypt);
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int sm4_avx_cbc_decrypt(struct skcipher_request *req,
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unsigned int bsize, sm4_crypt_func func)
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{
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struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
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struct sm4_ctx *ctx = crypto_skcipher_ctx(tfm);
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struct skcipher_walk walk;
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unsigned int nbytes;
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int err;
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err = skcipher_walk_virt(&walk, req, false);
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while ((nbytes = walk.nbytes) > 0) {
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const u8 *src = walk.src.virt.addr;
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u8 *dst = walk.dst.virt.addr;
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kernel_fpu_begin();
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while (nbytes >= bsize) {
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func(ctx->rkey_dec, dst, src, walk.iv);
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dst += bsize;
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src += bsize;
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nbytes -= bsize;
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}
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while (nbytes >= SM4_BLOCK_SIZE) {
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u8 keystream[SM4_BLOCK_SIZE * 8];
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u8 iv[SM4_BLOCK_SIZE];
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unsigned int nblocks = min(nbytes >> 4, 8u);
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int i;
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sm4_aesni_avx_crypt8(ctx->rkey_dec, keystream,
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src, nblocks);
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src += ((int)nblocks - 2) * SM4_BLOCK_SIZE;
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dst += (nblocks - 1) * SM4_BLOCK_SIZE;
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memcpy(iv, src + SM4_BLOCK_SIZE, SM4_BLOCK_SIZE);
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for (i = nblocks - 1; i > 0; i--) {
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crypto_xor_cpy(dst, src,
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&keystream[i * SM4_BLOCK_SIZE],
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SM4_BLOCK_SIZE);
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src -= SM4_BLOCK_SIZE;
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dst -= SM4_BLOCK_SIZE;
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}
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crypto_xor_cpy(dst, walk.iv, keystream, SM4_BLOCK_SIZE);
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memcpy(walk.iv, iv, SM4_BLOCK_SIZE);
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dst += nblocks * SM4_BLOCK_SIZE;
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src += (nblocks + 1) * SM4_BLOCK_SIZE;
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nbytes -= nblocks * SM4_BLOCK_SIZE;
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}
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kernel_fpu_end();
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err = skcipher_walk_done(&walk, nbytes);
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}
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return err;
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}
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EXPORT_SYMBOL_GPL(sm4_avx_cbc_decrypt);
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static int cbc_decrypt(struct skcipher_request *req)
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{
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return sm4_avx_cbc_decrypt(req, SM4_CRYPT8_BLOCK_SIZE,
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sm4_aesni_avx_cbc_dec_blk8);
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}
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int sm4_cfb_encrypt(struct skcipher_request *req)
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{
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struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
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struct sm4_ctx *ctx = crypto_skcipher_ctx(tfm);
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struct skcipher_walk walk;
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unsigned int nbytes;
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int err;
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err = skcipher_walk_virt(&walk, req, false);
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while ((nbytes = walk.nbytes) > 0) {
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u8 keystream[SM4_BLOCK_SIZE];
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const u8 *iv = walk.iv;
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const u8 *src = walk.src.virt.addr;
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u8 *dst = walk.dst.virt.addr;
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while (nbytes >= SM4_BLOCK_SIZE) {
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sm4_crypt_block(ctx->rkey_enc, keystream, iv);
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crypto_xor_cpy(dst, src, keystream, SM4_BLOCK_SIZE);
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iv = dst;
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src += SM4_BLOCK_SIZE;
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dst += SM4_BLOCK_SIZE;
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nbytes -= SM4_BLOCK_SIZE;
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}
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if (iv != walk.iv)
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memcpy(walk.iv, iv, SM4_BLOCK_SIZE);
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/* tail */
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if (walk.nbytes == walk.total && nbytes > 0) {
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sm4_crypt_block(ctx->rkey_enc, keystream, walk.iv);
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crypto_xor_cpy(dst, src, keystream, nbytes);
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nbytes = 0;
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}
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err = skcipher_walk_done(&walk, nbytes);
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}
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return err;
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}
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EXPORT_SYMBOL_GPL(sm4_cfb_encrypt);
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int sm4_avx_cfb_decrypt(struct skcipher_request *req,
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unsigned int bsize, sm4_crypt_func func)
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{
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struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
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struct sm4_ctx *ctx = crypto_skcipher_ctx(tfm);
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struct skcipher_walk walk;
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unsigned int nbytes;
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int err;
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err = skcipher_walk_virt(&walk, req, false);
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while ((nbytes = walk.nbytes) > 0) {
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const u8 *src = walk.src.virt.addr;
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u8 *dst = walk.dst.virt.addr;
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kernel_fpu_begin();
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while (nbytes >= bsize) {
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func(ctx->rkey_enc, dst, src, walk.iv);
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dst += bsize;
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src += bsize;
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nbytes -= bsize;
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}
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while (nbytes >= SM4_BLOCK_SIZE) {
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u8 keystream[SM4_BLOCK_SIZE * 8];
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unsigned int nblocks = min(nbytes >> 4, 8u);
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memcpy(keystream, walk.iv, SM4_BLOCK_SIZE);
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if (nblocks > 1)
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memcpy(&keystream[SM4_BLOCK_SIZE], src,
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(nblocks - 1) * SM4_BLOCK_SIZE);
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memcpy(walk.iv, src + (nblocks - 1) * SM4_BLOCK_SIZE,
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SM4_BLOCK_SIZE);
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sm4_aesni_avx_crypt8(ctx->rkey_enc, keystream,
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keystream, nblocks);
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crypto_xor_cpy(dst, src, keystream,
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nblocks * SM4_BLOCK_SIZE);
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dst += nblocks * SM4_BLOCK_SIZE;
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src += nblocks * SM4_BLOCK_SIZE;
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nbytes -= nblocks * SM4_BLOCK_SIZE;
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}
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kernel_fpu_end();
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/* tail */
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if (walk.nbytes == walk.total && nbytes > 0) {
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u8 keystream[SM4_BLOCK_SIZE];
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sm4_crypt_block(ctx->rkey_enc, keystream, walk.iv);
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crypto_xor_cpy(dst, src, keystream, nbytes);
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nbytes = 0;
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}
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err = skcipher_walk_done(&walk, nbytes);
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}
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return err;
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}
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EXPORT_SYMBOL_GPL(sm4_avx_cfb_decrypt);
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static int cfb_decrypt(struct skcipher_request *req)
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{
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return sm4_avx_cfb_decrypt(req, SM4_CRYPT8_BLOCK_SIZE,
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sm4_aesni_avx_cfb_dec_blk8);
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}
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int sm4_avx_ctr_crypt(struct skcipher_request *req,
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unsigned int bsize, sm4_crypt_func func)
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{
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struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
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struct sm4_ctx *ctx = crypto_skcipher_ctx(tfm);
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struct skcipher_walk walk;
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unsigned int nbytes;
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int err;
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err = skcipher_walk_virt(&walk, req, false);
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while ((nbytes = walk.nbytes) > 0) {
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const u8 *src = walk.src.virt.addr;
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u8 *dst = walk.dst.virt.addr;
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kernel_fpu_begin();
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while (nbytes >= bsize) {
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func(ctx->rkey_enc, dst, src, walk.iv);
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dst += bsize;
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src += bsize;
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nbytes -= bsize;
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}
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while (nbytes >= SM4_BLOCK_SIZE) {
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u8 keystream[SM4_BLOCK_SIZE * 8];
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unsigned int nblocks = min(nbytes >> 4, 8u);
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int i;
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for (i = 0; i < nblocks; i++) {
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memcpy(&keystream[i * SM4_BLOCK_SIZE],
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walk.iv, SM4_BLOCK_SIZE);
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crypto_inc(walk.iv, SM4_BLOCK_SIZE);
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}
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sm4_aesni_avx_crypt8(ctx->rkey_enc, keystream,
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keystream, nblocks);
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crypto_xor_cpy(dst, src, keystream,
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nblocks * SM4_BLOCK_SIZE);
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dst += nblocks * SM4_BLOCK_SIZE;
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src += nblocks * SM4_BLOCK_SIZE;
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nbytes -= nblocks * SM4_BLOCK_SIZE;
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}
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kernel_fpu_end();
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/* tail */
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if (walk.nbytes == walk.total && nbytes > 0) {
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u8 keystream[SM4_BLOCK_SIZE];
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memcpy(keystream, walk.iv, SM4_BLOCK_SIZE);
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crypto_inc(walk.iv, SM4_BLOCK_SIZE);
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sm4_crypt_block(ctx->rkey_enc, keystream, keystream);
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crypto_xor_cpy(dst, src, keystream, nbytes);
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dst += nbytes;
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src += nbytes;
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nbytes = 0;
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}
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||
|
|
|
||
|
|
err = skcipher_walk_done(&walk, nbytes);
|
||
|
|
}
|
||
|
|
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL_GPL(sm4_avx_ctr_crypt);
|
||
|
|
|
||
|
|
static int ctr_crypt(struct skcipher_request *req)
|
||
|
|
{
|
||
|
|
return sm4_avx_ctr_crypt(req, SM4_CRYPT8_BLOCK_SIZE,
|
||
|
|
sm4_aesni_avx_ctr_enc_blk8);
|
||
|
|
}
|
||
|
|
|
||
|
|
static struct skcipher_alg sm4_aesni_avx_skciphers[] = {
|
||
|
|
{
|
||
|
|
.base = {
|
||
|
|
.cra_name = "__ecb(sm4)",
|
||
|
|
.cra_driver_name = "__ecb-sm4-aesni-avx",
|
||
|
|
.cra_priority = 400,
|
||
|
|
.cra_flags = CRYPTO_ALG_INTERNAL,
|
||
|
|
.cra_blocksize = SM4_BLOCK_SIZE,
|
||
|
|
.cra_ctxsize = sizeof(struct sm4_ctx),
|
||
|
|
.cra_module = THIS_MODULE,
|
||
|
|
},
|
||
|
|
.min_keysize = SM4_KEY_SIZE,
|
||
|
|
.max_keysize = SM4_KEY_SIZE,
|
||
|
|
.walksize = 8 * SM4_BLOCK_SIZE,
|
||
|
|
.setkey = sm4_skcipher_setkey,
|
||
|
|
.encrypt = sm4_avx_ecb_encrypt,
|
||
|
|
.decrypt = sm4_avx_ecb_decrypt,
|
||
|
|
}, {
|
||
|
|
.base = {
|
||
|
|
.cra_name = "__cbc(sm4)",
|
||
|
|
.cra_driver_name = "__cbc-sm4-aesni-avx",
|
||
|
|
.cra_priority = 400,
|
||
|
|
.cra_flags = CRYPTO_ALG_INTERNAL,
|
||
|
|
.cra_blocksize = SM4_BLOCK_SIZE,
|
||
|
|
.cra_ctxsize = sizeof(struct sm4_ctx),
|
||
|
|
.cra_module = THIS_MODULE,
|
||
|
|
},
|
||
|
|
.min_keysize = SM4_KEY_SIZE,
|
||
|
|
.max_keysize = SM4_KEY_SIZE,
|
||
|
|
.ivsize = SM4_BLOCK_SIZE,
|
||
|
|
.walksize = 8 * SM4_BLOCK_SIZE,
|
||
|
|
.setkey = sm4_skcipher_setkey,
|
||
|
|
.encrypt = sm4_cbc_encrypt,
|
||
|
|
.decrypt = cbc_decrypt,
|
||
|
|
}, {
|
||
|
|
.base = {
|
||
|
|
.cra_name = "__cfb(sm4)",
|
||
|
|
.cra_driver_name = "__cfb-sm4-aesni-avx",
|
||
|
|
.cra_priority = 400,
|
||
|
|
.cra_flags = CRYPTO_ALG_INTERNAL,
|
||
|
|
.cra_blocksize = 1,
|
||
|
|
.cra_ctxsize = sizeof(struct sm4_ctx),
|
||
|
|
.cra_module = THIS_MODULE,
|
||
|
|
},
|
||
|
|
.min_keysize = SM4_KEY_SIZE,
|
||
|
|
.max_keysize = SM4_KEY_SIZE,
|
||
|
|
.ivsize = SM4_BLOCK_SIZE,
|
||
|
|
.chunksize = SM4_BLOCK_SIZE,
|
||
|
|
.walksize = 8 * SM4_BLOCK_SIZE,
|
||
|
|
.setkey = sm4_skcipher_setkey,
|
||
|
|
.encrypt = sm4_cfb_encrypt,
|
||
|
|
.decrypt = cfb_decrypt,
|
||
|
|
}, {
|
||
|
|
.base = {
|
||
|
|
.cra_name = "__ctr(sm4)",
|
||
|
|
.cra_driver_name = "__ctr-sm4-aesni-avx",
|
||
|
|
.cra_priority = 400,
|
||
|
|
.cra_flags = CRYPTO_ALG_INTERNAL,
|
||
|
|
.cra_blocksize = 1,
|
||
|
|
.cra_ctxsize = sizeof(struct sm4_ctx),
|
||
|
|
.cra_module = THIS_MODULE,
|
||
|
|
},
|
||
|
|
.min_keysize = SM4_KEY_SIZE,
|
||
|
|
.max_keysize = SM4_KEY_SIZE,
|
||
|
|
.ivsize = SM4_BLOCK_SIZE,
|
||
|
|
.chunksize = SM4_BLOCK_SIZE,
|
||
|
|
.walksize = 8 * SM4_BLOCK_SIZE,
|
||
|
|
.setkey = sm4_skcipher_setkey,
|
||
|
|
.encrypt = ctr_crypt,
|
||
|
|
.decrypt = ctr_crypt,
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
static struct simd_skcipher_alg *
|
||
|
|
simd_sm4_aesni_avx_skciphers[ARRAY_SIZE(sm4_aesni_avx_skciphers)];
|
||
|
|
|
||
|
|
static int __init sm4_init(void)
|
||
|
|
{
|
||
|
|
const char *feature_name;
|
||
|
|
|
||
|
|
if (!boot_cpu_has(X86_FEATURE_AVX) ||
|
||
|
|
!boot_cpu_has(X86_FEATURE_AES) ||
|
||
|
|
!boot_cpu_has(X86_FEATURE_OSXSAVE)) {
|
||
|
|
pr_info("AVX or AES-NI instructions are not detected.\n");
|
||
|
|
return -ENODEV;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM,
|
||
|
|
&feature_name)) {
|
||
|
|
pr_info("CPU feature '%s' is not supported.\n", feature_name);
|
||
|
|
return -ENODEV;
|
||
|
|
}
|
||
|
|
|
||
|
|
return simd_register_skciphers_compat(sm4_aesni_avx_skciphers,
|
||
|
|
ARRAY_SIZE(sm4_aesni_avx_skciphers),
|
||
|
|
simd_sm4_aesni_avx_skciphers);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void __exit sm4_exit(void)
|
||
|
|
{
|
||
|
|
simd_unregister_skciphers(sm4_aesni_avx_skciphers,
|
||
|
|
ARRAY_SIZE(sm4_aesni_avx_skciphers),
|
||
|
|
simd_sm4_aesni_avx_skciphers);
|
||
|
|
}
|
||
|
|
|
||
|
|
module_init(sm4_init);
|
||
|
|
module_exit(sm4_exit);
|
||
|
|
|
||
|
|
MODULE_LICENSE("GPL v2");
|
||
|
|
MODULE_AUTHOR("Tianjia Zhang <tianjia.zhang@linux.alibaba.com>");
|
||
|
|
MODULE_DESCRIPTION("SM4 Cipher Algorithm, AES-NI/AVX optimized");
|
||
|
|
MODULE_ALIAS_CRYPTO("sm4");
|
||
|
|
MODULE_ALIAS_CRYPTO("sm4-aesni-avx");
|