310 строки
8.5 KiB
C
310 строки
8.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Glue Code for x86_64/AVX/AES-NI assembler optimized version of Camellia
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*
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* Copyright © 2012-2013 Jussi Kivilinna <jussi.kivilinna@iki.fi>
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*/
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#include <asm/crypto/camellia.h>
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#include <asm/crypto/glue_helper.h>
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#include <crypto/algapi.h>
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#include <crypto/internal/simd.h>
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#include <crypto/xts.h>
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#include <linux/crypto.h>
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#include <linux/err.h>
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#include <linux/module.h>
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#include <linux/types.h>
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#define CAMELLIA_AESNI_PARALLEL_BLOCKS 16
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/* 16-way parallel cipher functions (avx/aes-ni) */
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asmlinkage void camellia_ecb_enc_16way(const void *ctx, u8 *dst, const u8 *src);
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EXPORT_SYMBOL_GPL(camellia_ecb_enc_16way);
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asmlinkage void camellia_ecb_dec_16way(const void *ctx, u8 *dst, const u8 *src);
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EXPORT_SYMBOL_GPL(camellia_ecb_dec_16way);
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asmlinkage void camellia_cbc_dec_16way(const void *ctx, u8 *dst, const u8 *src);
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EXPORT_SYMBOL_GPL(camellia_cbc_dec_16way);
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asmlinkage void camellia_ctr_16way(const void *ctx, u8 *dst, const u8 *src,
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le128 *iv);
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EXPORT_SYMBOL_GPL(camellia_ctr_16way);
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asmlinkage void camellia_xts_enc_16way(const void *ctx, u8 *dst, const u8 *src,
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le128 *iv);
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EXPORT_SYMBOL_GPL(camellia_xts_enc_16way);
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asmlinkage void camellia_xts_dec_16way(const void *ctx, u8 *dst, const u8 *src,
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le128 *iv);
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EXPORT_SYMBOL_GPL(camellia_xts_dec_16way);
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void camellia_xts_enc(const void *ctx, u8 *dst, const u8 *src, le128 *iv)
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{
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glue_xts_crypt_128bit_one(ctx, dst, src, iv, camellia_enc_blk);
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}
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EXPORT_SYMBOL_GPL(camellia_xts_enc);
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void camellia_xts_dec(const void *ctx, u8 *dst, const u8 *src, le128 *iv)
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{
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glue_xts_crypt_128bit_one(ctx, dst, src, iv, camellia_dec_blk);
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}
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EXPORT_SYMBOL_GPL(camellia_xts_dec);
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static const struct common_glue_ctx camellia_enc = {
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.num_funcs = 3,
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.fpu_blocks_limit = CAMELLIA_AESNI_PARALLEL_BLOCKS,
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.funcs = { {
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.num_blocks = CAMELLIA_AESNI_PARALLEL_BLOCKS,
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.fn_u = { .ecb = camellia_ecb_enc_16way }
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}, {
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.num_blocks = 2,
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.fn_u = { .ecb = camellia_enc_blk_2way }
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}, {
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.num_blocks = 1,
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.fn_u = { .ecb = camellia_enc_blk }
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} }
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};
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static const struct common_glue_ctx camellia_ctr = {
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.num_funcs = 3,
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.fpu_blocks_limit = CAMELLIA_AESNI_PARALLEL_BLOCKS,
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.funcs = { {
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.num_blocks = CAMELLIA_AESNI_PARALLEL_BLOCKS,
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.fn_u = { .ctr = camellia_ctr_16way }
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}, {
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.num_blocks = 2,
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.fn_u = { .ctr = camellia_crypt_ctr_2way }
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}, {
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.num_blocks = 1,
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.fn_u = { .ctr = camellia_crypt_ctr }
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} }
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};
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static const struct common_glue_ctx camellia_enc_xts = {
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.num_funcs = 2,
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.fpu_blocks_limit = CAMELLIA_AESNI_PARALLEL_BLOCKS,
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.funcs = { {
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.num_blocks = CAMELLIA_AESNI_PARALLEL_BLOCKS,
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.fn_u = { .xts = camellia_xts_enc_16way }
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}, {
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.num_blocks = 1,
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.fn_u = { .xts = camellia_xts_enc }
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} }
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};
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static const struct common_glue_ctx camellia_dec = {
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.num_funcs = 3,
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.fpu_blocks_limit = CAMELLIA_AESNI_PARALLEL_BLOCKS,
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.funcs = { {
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.num_blocks = CAMELLIA_AESNI_PARALLEL_BLOCKS,
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.fn_u = { .ecb = camellia_ecb_dec_16way }
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}, {
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.num_blocks = 2,
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.fn_u = { .ecb = camellia_dec_blk_2way }
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}, {
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.num_blocks = 1,
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.fn_u = { .ecb = camellia_dec_blk }
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} }
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};
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static const struct common_glue_ctx camellia_dec_cbc = {
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.num_funcs = 3,
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.fpu_blocks_limit = CAMELLIA_AESNI_PARALLEL_BLOCKS,
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.funcs = { {
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.num_blocks = CAMELLIA_AESNI_PARALLEL_BLOCKS,
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.fn_u = { .cbc = camellia_cbc_dec_16way }
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}, {
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.num_blocks = 2,
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.fn_u = { .cbc = camellia_decrypt_cbc_2way }
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}, {
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.num_blocks = 1,
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.fn_u = { .cbc = camellia_dec_blk }
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} }
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};
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static const struct common_glue_ctx camellia_dec_xts = {
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.num_funcs = 2,
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.fpu_blocks_limit = CAMELLIA_AESNI_PARALLEL_BLOCKS,
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.funcs = { {
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.num_blocks = CAMELLIA_AESNI_PARALLEL_BLOCKS,
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.fn_u = { .xts = camellia_xts_dec_16way }
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}, {
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.num_blocks = 1,
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.fn_u = { .xts = camellia_xts_dec }
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} }
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};
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static int camellia_setkey(struct crypto_skcipher *tfm, const u8 *key,
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unsigned int keylen)
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{
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return __camellia_setkey(crypto_skcipher_ctx(tfm), key, keylen);
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}
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static int ecb_encrypt(struct skcipher_request *req)
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{
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return glue_ecb_req_128bit(&camellia_enc, req);
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}
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static int ecb_decrypt(struct skcipher_request *req)
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{
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return glue_ecb_req_128bit(&camellia_dec, req);
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}
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static int cbc_encrypt(struct skcipher_request *req)
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{
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return glue_cbc_encrypt_req_128bit(camellia_enc_blk, req);
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}
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static int cbc_decrypt(struct skcipher_request *req)
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{
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return glue_cbc_decrypt_req_128bit(&camellia_dec_cbc, req);
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}
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static int ctr_crypt(struct skcipher_request *req)
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{
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return glue_ctr_req_128bit(&camellia_ctr, req);
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}
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int xts_camellia_setkey(struct crypto_skcipher *tfm, const u8 *key,
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unsigned int keylen)
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{
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struct camellia_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
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int err;
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err = xts_verify_key(tfm, key, keylen);
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if (err)
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return err;
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/* first half of xts-key is for crypt */
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err = __camellia_setkey(&ctx->crypt_ctx, key, keylen / 2);
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if (err)
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return err;
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/* second half of xts-key is for tweak */
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return __camellia_setkey(&ctx->tweak_ctx, key + keylen / 2, keylen / 2);
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}
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EXPORT_SYMBOL_GPL(xts_camellia_setkey);
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static int xts_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 camellia_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
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return glue_xts_req_128bit(&camellia_enc_xts, req, camellia_enc_blk,
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&ctx->tweak_ctx, &ctx->crypt_ctx, false);
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}
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static int xts_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 camellia_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
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return glue_xts_req_128bit(&camellia_dec_xts, req, camellia_enc_blk,
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&ctx->tweak_ctx, &ctx->crypt_ctx, true);
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}
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static struct skcipher_alg camellia_algs[] = {
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{
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.base.cra_name = "__ecb(camellia)",
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.base.cra_driver_name = "__ecb-camellia-aesni",
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.base.cra_priority = 400,
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.base.cra_flags = CRYPTO_ALG_INTERNAL,
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.base.cra_blocksize = CAMELLIA_BLOCK_SIZE,
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.base.cra_ctxsize = sizeof(struct camellia_ctx),
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.base.cra_module = THIS_MODULE,
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.min_keysize = CAMELLIA_MIN_KEY_SIZE,
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.max_keysize = CAMELLIA_MAX_KEY_SIZE,
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.setkey = camellia_setkey,
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.encrypt = ecb_encrypt,
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.decrypt = ecb_decrypt,
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}, {
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.base.cra_name = "__cbc(camellia)",
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.base.cra_driver_name = "__cbc-camellia-aesni",
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.base.cra_priority = 400,
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.base.cra_flags = CRYPTO_ALG_INTERNAL,
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.base.cra_blocksize = CAMELLIA_BLOCK_SIZE,
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.base.cra_ctxsize = sizeof(struct camellia_ctx),
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.base.cra_module = THIS_MODULE,
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.min_keysize = CAMELLIA_MIN_KEY_SIZE,
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.max_keysize = CAMELLIA_MAX_KEY_SIZE,
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.ivsize = CAMELLIA_BLOCK_SIZE,
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.setkey = camellia_setkey,
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.encrypt = cbc_encrypt,
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.decrypt = cbc_decrypt,
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}, {
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.base.cra_name = "__ctr(camellia)",
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.base.cra_driver_name = "__ctr-camellia-aesni",
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.base.cra_priority = 400,
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.base.cra_flags = CRYPTO_ALG_INTERNAL,
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.base.cra_blocksize = 1,
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.base.cra_ctxsize = sizeof(struct camellia_ctx),
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.base.cra_module = THIS_MODULE,
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.min_keysize = CAMELLIA_MIN_KEY_SIZE,
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.max_keysize = CAMELLIA_MAX_KEY_SIZE,
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.ivsize = CAMELLIA_BLOCK_SIZE,
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.chunksize = CAMELLIA_BLOCK_SIZE,
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.setkey = camellia_setkey,
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.encrypt = ctr_crypt,
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.decrypt = ctr_crypt,
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}, {
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.base.cra_name = "__xts(camellia)",
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.base.cra_driver_name = "__xts-camellia-aesni",
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.base.cra_priority = 400,
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.base.cra_flags = CRYPTO_ALG_INTERNAL,
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.base.cra_blocksize = CAMELLIA_BLOCK_SIZE,
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.base.cra_ctxsize = sizeof(struct camellia_xts_ctx),
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.base.cra_module = THIS_MODULE,
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.min_keysize = 2 * CAMELLIA_MIN_KEY_SIZE,
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.max_keysize = 2 * CAMELLIA_MAX_KEY_SIZE,
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.ivsize = CAMELLIA_BLOCK_SIZE,
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.setkey = xts_camellia_setkey,
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.encrypt = xts_encrypt,
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.decrypt = xts_decrypt,
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},
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};
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static struct simd_skcipher_alg *camellia_simd_algs[ARRAY_SIZE(camellia_algs)];
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static int __init camellia_aesni_init(void)
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{
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const char *feature_name;
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if (!boot_cpu_has(X86_FEATURE_AVX) ||
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!boot_cpu_has(X86_FEATURE_AES) ||
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!boot_cpu_has(X86_FEATURE_OSXSAVE)) {
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pr_info("AVX or AES-NI instructions are not detected.\n");
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return -ENODEV;
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}
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if (!cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM,
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&feature_name)) {
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pr_info("CPU feature '%s' is not supported.\n", feature_name);
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return -ENODEV;
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}
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return simd_register_skciphers_compat(camellia_algs,
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ARRAY_SIZE(camellia_algs),
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camellia_simd_algs);
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}
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static void __exit camellia_aesni_fini(void)
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{
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simd_unregister_skciphers(camellia_algs, ARRAY_SIZE(camellia_algs),
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camellia_simd_algs);
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}
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module_init(camellia_aesni_init);
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module_exit(camellia_aesni_fini);
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("Camellia Cipher Algorithm, AES-NI/AVX optimized");
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MODULE_ALIAS_CRYPTO("camellia");
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MODULE_ALIAS_CRYPTO("camellia-asm");
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