Quelle  camellia_aesni_avx_glue.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Glue Code for x86_64/AVX/AES-NI assembler optimized version of Camellia
 *
 * Copyright © 2012-2013 Jussi Kivilinna <jussi.kivilinna@iki.fi>
 */

#include <crypto/algapi.h>
#include <linux/crypto.h>
#include <linux/err.h>
#include <linux/export.h>
#include <linux/module.h>
#include <linux/types.h>

#include "camellia.h"
#include "ecb_cbc_helpers.h"

#define CAMELLIA_AESNI_PARALLEL_BLOCKS 16

/* 16-way parallel cipher functions (avx/aes-ni) */
asmlinkage void camellia_ecb_enc_16way(const void *ctx, u8 *dst, const u8 *src);
EXPORT_SYMBOL_GPL(camellia_ecb_enc_16way);

asmlinkage void camellia_ecb_dec_16way(const void *ctx, u8 *dst, const u8 *src);
EXPORT_SYMBOL_GPL(camellia_ecb_dec_16way);

asmlinkage void camellia_cbc_dec_16way(const void *ctx, u8 *dst, const u8 *src);
EXPORT_SYMBOL_GPL(camellia_cbc_dec_16way);

static int camellia_setkey(struct crypto_skcipher *tfm, const u8 *key,
      unsigned int keylen)
{
 return __camellia_setkey(crypto_skcipher_ctx(tfm), key, keylen);
}

static int ecb_encrypt(struct skcipher_request *req)
{
 ECB_WALK_START(req, CAMELLIA_BLOCK_SIZE, CAMELLIA_AESNI_PARALLEL_BLOCKS);
 ECB_BLOCK(CAMELLIA_AESNI_PARALLEL_BLOCKS, camellia_ecb_enc_16way);
 ECB_BLOCK(2, camellia_enc_blk_2way);
 ECB_BLOCK(1, camellia_enc_blk);
 ECB_WALK_END();
}

static int ecb_decrypt(struct skcipher_request *req)
{
 ECB_WALK_START(req, CAMELLIA_BLOCK_SIZE, CAMELLIA_AESNI_PARALLEL_BLOCKS);
 ECB_BLOCK(CAMELLIA_AESNI_PARALLEL_BLOCKS, camellia_ecb_dec_16way);
 ECB_BLOCK(2, camellia_dec_blk_2way);
 ECB_BLOCK(1, camellia_dec_blk);
 ECB_WALK_END();
}

static int cbc_encrypt(struct skcipher_request *req)
{
 CBC_WALK_START(req, CAMELLIA_BLOCK_SIZE, -1);
 CBC_ENC_BLOCK(camellia_enc_blk);
 CBC_WALK_END();
}

static int cbc_decrypt(struct skcipher_request *req)
{
 CBC_WALK_START(req, CAMELLIA_BLOCK_SIZE, CAMELLIA_AESNI_PARALLEL_BLOCKS);
 CBC_DEC_BLOCK(CAMELLIA_AESNI_PARALLEL_BLOCKS, camellia_cbc_dec_16way);
 CBC_DEC_BLOCK(2, camellia_decrypt_cbc_2way);
 CBC_DEC_BLOCK(1, camellia_dec_blk);
 CBC_WALK_END();
}

static struct skcipher_alg camellia_algs[] = {
 {
  .base.cra_name  = "ecb(camellia)",
  .base.cra_driver_name = "ecb-camellia-aesni",
  .base.cra_priority = 400,
  .base.cra_blocksize = CAMELLIA_BLOCK_SIZE,
  .base.cra_ctxsize = sizeof(struct camellia_ctx),
  .base.cra_module = THIS_MODULE,
  .min_keysize  = CAMELLIA_MIN_KEY_SIZE,
  .max_keysize  = CAMELLIA_MAX_KEY_SIZE,
  .setkey   = camellia_setkey,
  .encrypt  = ecb_encrypt,
  .decrypt  = ecb_decrypt,
 }, {
  .base.cra_name  = "cbc(camellia)",
  .base.cra_driver_name = "cbc-camellia-aesni",
  .base.cra_priority = 400,
  .base.cra_blocksize = CAMELLIA_BLOCK_SIZE,
  .base.cra_ctxsize = sizeof(struct camellia_ctx),
  .base.cra_module = THIS_MODULE,
  .min_keysize  = CAMELLIA_MIN_KEY_SIZE,
  .max_keysize  = CAMELLIA_MAX_KEY_SIZE,
  .ivsize   = CAMELLIA_BLOCK_SIZE,
  .setkey   = camellia_setkey,
  .encrypt  = cbc_encrypt,
  .decrypt  = cbc_decrypt,
 }
};

static int __init camellia_aesni_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 crypto_register_skciphers(camellia_algs,
      ARRAY_SIZE(camellia_algs));
}

static void __exit camellia_aesni_fini(void)
{
 crypto_unregister_skciphers(camellia_algs, ARRAY_SIZE(camellia_algs));
}

module_init(camellia_aesni_init);
module_exit(camellia_aesni_fini);

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Camellia Cipher Algorithm, AES-NI/AVX optimized");
MODULE_ALIAS_CRYPTO("camellia");
MODULE_ALIAS_CRYPTO("camellia-asm");