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The crypto glue performed function prototype casting via macros to make indirect calls to assembly routines. Instead of performing casts at the call sites (which trips Control Flow Integrity prototype checking), switch each prototype to a common standard set of arguments which allows the removal of the existing macros. In order to keep pointer math unchanged, internal casting between u128 pointers and u8 pointers is added. Co-developed-by: João Moreira <joao.moreira@intel.com> Signed-off-by: João Moreira <joao.moreira@intel.com> Signed-off-by: Kees Cook <keescook@chromium.org> Reviewed-by: Eric Biggers <ebiggers@kernel.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
274 lines
7.1 KiB
C
274 lines
7.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Glue Code for x86_64/AVX2 assembler optimized version of Serpent
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*
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* Copyright © 2012-2013 Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
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*/
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/crypto.h>
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#include <linux/err.h>
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#include <crypto/algapi.h>
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#include <crypto/internal/simd.h>
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#include <crypto/serpent.h>
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#include <crypto/xts.h>
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#include <asm/crypto/glue_helper.h>
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#include <asm/crypto/serpent-avx.h>
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#define SERPENT_AVX2_PARALLEL_BLOCKS 16
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/* 16-way AVX2 parallel cipher functions */
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asmlinkage void serpent_ecb_enc_16way(const void *ctx, u8 *dst, const u8 *src);
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asmlinkage void serpent_ecb_dec_16way(const void *ctx, u8 *dst, const u8 *src);
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asmlinkage void serpent_cbc_dec_16way(const void *ctx, u8 *dst, const u8 *src);
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asmlinkage void serpent_ctr_16way(const void *ctx, u8 *dst, const u8 *src,
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le128 *iv);
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asmlinkage void serpent_xts_enc_16way(const void *ctx, u8 *dst, const u8 *src,
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le128 *iv);
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asmlinkage void serpent_xts_dec_16way(const void *ctx, u8 *dst, const u8 *src,
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le128 *iv);
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static int serpent_setkey_skcipher(struct crypto_skcipher *tfm,
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const u8 *key, unsigned int keylen)
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{
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return __serpent_setkey(crypto_skcipher_ctx(tfm), key, keylen);
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}
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static const struct common_glue_ctx serpent_enc = {
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.num_funcs = 3,
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.fpu_blocks_limit = 8,
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.funcs = { {
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.num_blocks = 16,
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.fn_u = { .ecb = serpent_ecb_enc_16way }
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}, {
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.num_blocks = 8,
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.fn_u = { .ecb = serpent_ecb_enc_8way_avx }
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}, {
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.num_blocks = 1,
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.fn_u = { .ecb = __serpent_encrypt }
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} }
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};
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static const struct common_glue_ctx serpent_ctr = {
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.num_funcs = 3,
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.fpu_blocks_limit = 8,
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.funcs = { {
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.num_blocks = 16,
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.fn_u = { .ctr = serpent_ctr_16way }
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}, {
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.num_blocks = 8,
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.fn_u = { .ctr = serpent_ctr_8way_avx }
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}, {
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.num_blocks = 1,
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.fn_u = { .ctr = __serpent_crypt_ctr }
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} }
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};
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static const struct common_glue_ctx serpent_enc_xts = {
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.num_funcs = 3,
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.fpu_blocks_limit = 8,
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.funcs = { {
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.num_blocks = 16,
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.fn_u = { .xts = serpent_xts_enc_16way }
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}, {
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.num_blocks = 8,
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.fn_u = { .xts = serpent_xts_enc_8way_avx }
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}, {
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.num_blocks = 1,
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.fn_u = { .xts = serpent_xts_enc }
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} }
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};
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static const struct common_glue_ctx serpent_dec = {
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.num_funcs = 3,
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.fpu_blocks_limit = 8,
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.funcs = { {
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.num_blocks = 16,
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.fn_u = { .ecb = serpent_ecb_dec_16way }
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}, {
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.num_blocks = 8,
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.fn_u = { .ecb = serpent_ecb_dec_8way_avx }
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}, {
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.num_blocks = 1,
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.fn_u = { .ecb = __serpent_decrypt }
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} }
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};
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static const struct common_glue_ctx serpent_dec_cbc = {
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.num_funcs = 3,
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.fpu_blocks_limit = 8,
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.funcs = { {
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.num_blocks = 16,
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.fn_u = { .cbc = serpent_cbc_dec_16way }
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}, {
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.num_blocks = 8,
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.fn_u = { .cbc = serpent_cbc_dec_8way_avx }
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}, {
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.num_blocks = 1,
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.fn_u = { .cbc = __serpent_decrypt }
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} }
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};
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static const struct common_glue_ctx serpent_dec_xts = {
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.num_funcs = 3,
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.fpu_blocks_limit = 8,
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.funcs = { {
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.num_blocks = 16,
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.fn_u = { .xts = serpent_xts_dec_16way }
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}, {
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.num_blocks = 8,
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.fn_u = { .xts = serpent_xts_dec_8way_avx }
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}, {
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.num_blocks = 1,
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.fn_u = { .xts = serpent_xts_dec }
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} }
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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(&serpent_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(&serpent_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(__serpent_encrypt, 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(&serpent_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(&serpent_ctr, req);
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}
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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 serpent_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
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return glue_xts_req_128bit(&serpent_enc_xts, req,
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__serpent_encrypt, &ctx->tweak_ctx,
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&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 serpent_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
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return glue_xts_req_128bit(&serpent_dec_xts, req,
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__serpent_encrypt, &ctx->tweak_ctx,
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&ctx->crypt_ctx, true);
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}
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static struct skcipher_alg serpent_algs[] = {
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{
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.base.cra_name = "__ecb(serpent)",
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.base.cra_driver_name = "__ecb-serpent-avx2",
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.base.cra_priority = 600,
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.base.cra_flags = CRYPTO_ALG_INTERNAL,
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.base.cra_blocksize = SERPENT_BLOCK_SIZE,
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.base.cra_ctxsize = sizeof(struct serpent_ctx),
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.base.cra_module = THIS_MODULE,
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.min_keysize = SERPENT_MIN_KEY_SIZE,
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.max_keysize = SERPENT_MAX_KEY_SIZE,
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.setkey = serpent_setkey_skcipher,
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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(serpent)",
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.base.cra_driver_name = "__cbc-serpent-avx2",
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.base.cra_priority = 600,
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.base.cra_flags = CRYPTO_ALG_INTERNAL,
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.base.cra_blocksize = SERPENT_BLOCK_SIZE,
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.base.cra_ctxsize = sizeof(struct serpent_ctx),
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.base.cra_module = THIS_MODULE,
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.min_keysize = SERPENT_MIN_KEY_SIZE,
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.max_keysize = SERPENT_MAX_KEY_SIZE,
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.ivsize = SERPENT_BLOCK_SIZE,
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.setkey = serpent_setkey_skcipher,
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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(serpent)",
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.base.cra_driver_name = "__ctr-serpent-avx2",
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.base.cra_priority = 600,
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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 serpent_ctx),
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.base.cra_module = THIS_MODULE,
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.min_keysize = SERPENT_MIN_KEY_SIZE,
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.max_keysize = SERPENT_MAX_KEY_SIZE,
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.ivsize = SERPENT_BLOCK_SIZE,
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.chunksize = SERPENT_BLOCK_SIZE,
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.setkey = serpent_setkey_skcipher,
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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(serpent)",
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.base.cra_driver_name = "__xts-serpent-avx2",
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.base.cra_priority = 600,
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.base.cra_flags = CRYPTO_ALG_INTERNAL,
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.base.cra_blocksize = SERPENT_BLOCK_SIZE,
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.base.cra_ctxsize = sizeof(struct serpent_xts_ctx),
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.base.cra_module = THIS_MODULE,
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.min_keysize = 2 * SERPENT_MIN_KEY_SIZE,
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.max_keysize = 2 * SERPENT_MAX_KEY_SIZE,
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.ivsize = SERPENT_BLOCK_SIZE,
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.setkey = xts_serpent_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 *serpent_simd_algs[ARRAY_SIZE(serpent_algs)];
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static int __init init(void)
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{
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const char *feature_name;
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if (!boot_cpu_has(X86_FEATURE_AVX2) || !boot_cpu_has(X86_FEATURE_OSXSAVE)) {
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pr_info("AVX2 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(serpent_algs,
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ARRAY_SIZE(serpent_algs),
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serpent_simd_algs);
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}
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static void __exit fini(void)
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{
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simd_unregister_skciphers(serpent_algs, ARRAY_SIZE(serpent_algs),
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serpent_simd_algs);
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}
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module_init(init);
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module_exit(fini);
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("Serpent Cipher Algorithm, AVX2 optimized");
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MODULE_ALIAS_CRYPTO("serpent");
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MODULE_ALIAS_CRYPTO("serpent-asm");
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