326 lines
9.3 KiB
C
326 lines
9.3 KiB
C
/*
|
|
* Glue Code for x86_64/AVX/AES-NI assembler optimized version of Camellia
|
|
*
|
|
* Copyright © 2012-2013 Jussi Kivilinna <jussi.kivilinna@iki.fi>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
*/
|
|
|
|
#include <asm/crypto/camellia.h>
|
|
#include <asm/crypto/glue_helper.h>
|
|
#include <crypto/algapi.h>
|
|
#include <crypto/internal/simd.h>
|
|
#include <crypto/xts.h>
|
|
#include <linux/crypto.h>
|
|
#include <linux/err.h>
|
|
#include <linux/module.h>
|
|
#include <linux/types.h>
|
|
|
|
#define CAMELLIA_AESNI_PARALLEL_BLOCKS 16
|
|
|
|
/* 16-way parallel cipher functions (avx/aes-ni) */
|
|
asmlinkage void camellia_ecb_enc_16way(struct camellia_ctx *ctx, u8 *dst,
|
|
const u8 *src);
|
|
EXPORT_SYMBOL_GPL(camellia_ecb_enc_16way);
|
|
|
|
asmlinkage void camellia_ecb_dec_16way(struct camellia_ctx *ctx, u8 *dst,
|
|
const u8 *src);
|
|
EXPORT_SYMBOL_GPL(camellia_ecb_dec_16way);
|
|
|
|
asmlinkage void camellia_cbc_dec_16way(struct camellia_ctx *ctx, u8 *dst,
|
|
const u8 *src);
|
|
EXPORT_SYMBOL_GPL(camellia_cbc_dec_16way);
|
|
|
|
asmlinkage void camellia_ctr_16way(struct camellia_ctx *ctx, u8 *dst,
|
|
const u8 *src, le128 *iv);
|
|
EXPORT_SYMBOL_GPL(camellia_ctr_16way);
|
|
|
|
asmlinkage void camellia_xts_enc_16way(struct camellia_ctx *ctx, u8 *dst,
|
|
const u8 *src, le128 *iv);
|
|
EXPORT_SYMBOL_GPL(camellia_xts_enc_16way);
|
|
|
|
asmlinkage void camellia_xts_dec_16way(struct camellia_ctx *ctx, u8 *dst,
|
|
const u8 *src, le128 *iv);
|
|
EXPORT_SYMBOL_GPL(camellia_xts_dec_16way);
|
|
|
|
void camellia_xts_enc(void *ctx, u128 *dst, const u128 *src, le128 *iv)
|
|
{
|
|
glue_xts_crypt_128bit_one(ctx, dst, src, iv,
|
|
GLUE_FUNC_CAST(camellia_enc_blk));
|
|
}
|
|
EXPORT_SYMBOL_GPL(camellia_xts_enc);
|
|
|
|
void camellia_xts_dec(void *ctx, u128 *dst, const u128 *src, le128 *iv)
|
|
{
|
|
glue_xts_crypt_128bit_one(ctx, dst, src, iv,
|
|
GLUE_FUNC_CAST(camellia_dec_blk));
|
|
}
|
|
EXPORT_SYMBOL_GPL(camellia_xts_dec);
|
|
|
|
static const struct common_glue_ctx camellia_enc = {
|
|
.num_funcs = 3,
|
|
.fpu_blocks_limit = CAMELLIA_AESNI_PARALLEL_BLOCKS,
|
|
|
|
.funcs = { {
|
|
.num_blocks = CAMELLIA_AESNI_PARALLEL_BLOCKS,
|
|
.fn_u = { .ecb = GLUE_FUNC_CAST(camellia_ecb_enc_16way) }
|
|
}, {
|
|
.num_blocks = 2,
|
|
.fn_u = { .ecb = GLUE_FUNC_CAST(camellia_enc_blk_2way) }
|
|
}, {
|
|
.num_blocks = 1,
|
|
.fn_u = { .ecb = GLUE_FUNC_CAST(camellia_enc_blk) }
|
|
} }
|
|
};
|
|
|
|
static const struct common_glue_ctx camellia_ctr = {
|
|
.num_funcs = 3,
|
|
.fpu_blocks_limit = CAMELLIA_AESNI_PARALLEL_BLOCKS,
|
|
|
|
.funcs = { {
|
|
.num_blocks = CAMELLIA_AESNI_PARALLEL_BLOCKS,
|
|
.fn_u = { .ctr = GLUE_CTR_FUNC_CAST(camellia_ctr_16way) }
|
|
}, {
|
|
.num_blocks = 2,
|
|
.fn_u = { .ctr = GLUE_CTR_FUNC_CAST(camellia_crypt_ctr_2way) }
|
|
}, {
|
|
.num_blocks = 1,
|
|
.fn_u = { .ctr = GLUE_CTR_FUNC_CAST(camellia_crypt_ctr) }
|
|
} }
|
|
};
|
|
|
|
static const struct common_glue_ctx camellia_enc_xts = {
|
|
.num_funcs = 2,
|
|
.fpu_blocks_limit = CAMELLIA_AESNI_PARALLEL_BLOCKS,
|
|
|
|
.funcs = { {
|
|
.num_blocks = CAMELLIA_AESNI_PARALLEL_BLOCKS,
|
|
.fn_u = { .xts = GLUE_XTS_FUNC_CAST(camellia_xts_enc_16way) }
|
|
}, {
|
|
.num_blocks = 1,
|
|
.fn_u = { .xts = GLUE_XTS_FUNC_CAST(camellia_xts_enc) }
|
|
} }
|
|
};
|
|
|
|
static const struct common_glue_ctx camellia_dec = {
|
|
.num_funcs = 3,
|
|
.fpu_blocks_limit = CAMELLIA_AESNI_PARALLEL_BLOCKS,
|
|
|
|
.funcs = { {
|
|
.num_blocks = CAMELLIA_AESNI_PARALLEL_BLOCKS,
|
|
.fn_u = { .ecb = GLUE_FUNC_CAST(camellia_ecb_dec_16way) }
|
|
}, {
|
|
.num_blocks = 2,
|
|
.fn_u = { .ecb = GLUE_FUNC_CAST(camellia_dec_blk_2way) }
|
|
}, {
|
|
.num_blocks = 1,
|
|
.fn_u = { .ecb = GLUE_FUNC_CAST(camellia_dec_blk) }
|
|
} }
|
|
};
|
|
|
|
static const struct common_glue_ctx camellia_dec_cbc = {
|
|
.num_funcs = 3,
|
|
.fpu_blocks_limit = CAMELLIA_AESNI_PARALLEL_BLOCKS,
|
|
|
|
.funcs = { {
|
|
.num_blocks = CAMELLIA_AESNI_PARALLEL_BLOCKS,
|
|
.fn_u = { .cbc = GLUE_CBC_FUNC_CAST(camellia_cbc_dec_16way) }
|
|
}, {
|
|
.num_blocks = 2,
|
|
.fn_u = { .cbc = GLUE_CBC_FUNC_CAST(camellia_decrypt_cbc_2way) }
|
|
}, {
|
|
.num_blocks = 1,
|
|
.fn_u = { .cbc = GLUE_CBC_FUNC_CAST(camellia_dec_blk) }
|
|
} }
|
|
};
|
|
|
|
static const struct common_glue_ctx camellia_dec_xts = {
|
|
.num_funcs = 2,
|
|
.fpu_blocks_limit = CAMELLIA_AESNI_PARALLEL_BLOCKS,
|
|
|
|
.funcs = { {
|
|
.num_blocks = CAMELLIA_AESNI_PARALLEL_BLOCKS,
|
|
.fn_u = { .xts = GLUE_XTS_FUNC_CAST(camellia_xts_dec_16way) }
|
|
}, {
|
|
.num_blocks = 1,
|
|
.fn_u = { .xts = GLUE_XTS_FUNC_CAST(camellia_xts_dec) }
|
|
} }
|
|
};
|
|
|
|
static int camellia_setkey(struct crypto_skcipher *tfm, const u8 *key,
|
|
unsigned int keylen)
|
|
{
|
|
return __camellia_setkey(crypto_skcipher_ctx(tfm), key, keylen,
|
|
&tfm->base.crt_flags);
|
|
}
|
|
|
|
static int ecb_encrypt(struct skcipher_request *req)
|
|
{
|
|
return glue_ecb_req_128bit(&camellia_enc, req);
|
|
}
|
|
|
|
static int ecb_decrypt(struct skcipher_request *req)
|
|
{
|
|
return glue_ecb_req_128bit(&camellia_dec, req);
|
|
}
|
|
|
|
static int cbc_encrypt(struct skcipher_request *req)
|
|
{
|
|
return glue_cbc_encrypt_req_128bit(GLUE_FUNC_CAST(camellia_enc_blk),
|
|
req);
|
|
}
|
|
|
|
static int cbc_decrypt(struct skcipher_request *req)
|
|
{
|
|
return glue_cbc_decrypt_req_128bit(&camellia_dec_cbc, req);
|
|
}
|
|
|
|
static int ctr_crypt(struct skcipher_request *req)
|
|
{
|
|
return glue_ctr_req_128bit(&camellia_ctr, req);
|
|
}
|
|
|
|
int xts_camellia_setkey(struct crypto_skcipher *tfm, const u8 *key,
|
|
unsigned int keylen)
|
|
{
|
|
struct camellia_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
|
|
u32 *flags = &tfm->base.crt_flags;
|
|
int err;
|
|
|
|
err = xts_verify_key(tfm, key, keylen);
|
|
if (err)
|
|
return err;
|
|
|
|
/* first half of xts-key is for crypt */
|
|
err = __camellia_setkey(&ctx->crypt_ctx, key, keylen / 2, flags);
|
|
if (err)
|
|
return err;
|
|
|
|
/* second half of xts-key is for tweak */
|
|
return __camellia_setkey(&ctx->tweak_ctx, key + keylen / 2, keylen / 2,
|
|
flags);
|
|
}
|
|
EXPORT_SYMBOL_GPL(xts_camellia_setkey);
|
|
|
|
static int xts_encrypt(struct skcipher_request *req)
|
|
{
|
|
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
|
|
struct camellia_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
|
|
|
|
return glue_xts_req_128bit(&camellia_enc_xts, req,
|
|
XTS_TWEAK_CAST(camellia_enc_blk),
|
|
&ctx->tweak_ctx, &ctx->crypt_ctx);
|
|
}
|
|
|
|
static int xts_decrypt(struct skcipher_request *req)
|
|
{
|
|
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
|
|
struct camellia_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
|
|
|
|
return glue_xts_req_128bit(&camellia_dec_xts, req,
|
|
XTS_TWEAK_CAST(camellia_enc_blk),
|
|
&ctx->tweak_ctx, &ctx->crypt_ctx);
|
|
}
|
|
|
|
static struct skcipher_alg camellia_algs[] = {
|
|
{
|
|
.base.cra_name = "__ecb(camellia)",
|
|
.base.cra_driver_name = "__ecb-camellia-aesni",
|
|
.base.cra_priority = 400,
|
|
.base.cra_flags = CRYPTO_ALG_INTERNAL,
|
|
.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_flags = CRYPTO_ALG_INTERNAL,
|
|
.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,
|
|
}, {
|
|
.base.cra_name = "__ctr(camellia)",
|
|
.base.cra_driver_name = "__ctr-camellia-aesni",
|
|
.base.cra_priority = 400,
|
|
.base.cra_flags = CRYPTO_ALG_INTERNAL,
|
|
.base.cra_blocksize = 1,
|
|
.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,
|
|
.chunksize = CAMELLIA_BLOCK_SIZE,
|
|
.setkey = camellia_setkey,
|
|
.encrypt = ctr_crypt,
|
|
.decrypt = ctr_crypt,
|
|
}, {
|
|
.base.cra_name = "__xts(camellia)",
|
|
.base.cra_driver_name = "__xts-camellia-aesni",
|
|
.base.cra_priority = 400,
|
|
.base.cra_flags = CRYPTO_ALG_INTERNAL,
|
|
.base.cra_blocksize = CAMELLIA_BLOCK_SIZE,
|
|
.base.cra_ctxsize = sizeof(struct camellia_xts_ctx),
|
|
.base.cra_module = THIS_MODULE,
|
|
.min_keysize = 2 * CAMELLIA_MIN_KEY_SIZE,
|
|
.max_keysize = 2 * CAMELLIA_MAX_KEY_SIZE,
|
|
.ivsize = CAMELLIA_BLOCK_SIZE,
|
|
.setkey = xts_camellia_setkey,
|
|
.encrypt = xts_encrypt,
|
|
.decrypt = xts_decrypt,
|
|
},
|
|
};
|
|
|
|
static struct simd_skcipher_alg *camellia_simd_algs[ARRAY_SIZE(camellia_algs)];
|
|
|
|
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 simd_register_skciphers_compat(camellia_algs,
|
|
ARRAY_SIZE(camellia_algs),
|
|
camellia_simd_algs);
|
|
}
|
|
|
|
static void __exit camellia_aesni_fini(void)
|
|
{
|
|
simd_unregister_skciphers(camellia_algs, ARRAY_SIZE(camellia_algs),
|
|
camellia_simd_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");
|