[mirror_ubuntu-bionic-kernel.git] / arch / x86 / crypto / serpent_avx_glue.c

/*
 * Glue Code for AVX assembler versions of Serpent Cipher
 *
 * Copyright (C) 2012 Johannes Goetzfried
 *     <Johannes.Goetzfried@informatik.stud.uni-erlangen.de>
 *
 * Copyright © 2011-2013 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.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
 * USA
 *
 */

#include <linux/module.h>
#include <linux/hardirq.h>
#include <linux/types.h>
#include <linux/crypto.h>
#include <linux/err.h>
#include <crypto/ablk_helper.h>
#include <crypto/algapi.h>
#include <crypto/serpent.h>
#include <crypto/cryptd.h>
#include <crypto/b128ops.h>
#include <crypto/ctr.h>
#include <crypto/lrw.h>
#include <crypto/xts.h>
#include <asm/fpu/api.h>
#include <asm/crypto/serpent-avx.h>
#include <asm/crypto/glue_helper.h>

/* 8-way parallel cipher functions */
asmlinkage void serpent_ecb_enc_8way_avx(struct serpent_ctx *ctx, u8 *dst,
					 const u8 *src);
EXPORT_SYMBOL_GPL(serpent_ecb_enc_8way_avx);

asmlinkage void serpent_ecb_dec_8way_avx(struct serpent_ctx *ctx, u8 *dst,
					 const u8 *src);
EXPORT_SYMBOL_GPL(serpent_ecb_dec_8way_avx);

asmlinkage void serpent_cbc_dec_8way_avx(struct serpent_ctx *ctx, u8 *dst,
					 const u8 *src);
EXPORT_SYMBOL_GPL(serpent_cbc_dec_8way_avx);

asmlinkage void serpent_ctr_8way_avx(struct serpent_ctx *ctx, u8 *dst,
				     const u8 *src, le128 *iv);
EXPORT_SYMBOL_GPL(serpent_ctr_8way_avx);

asmlinkage void serpent_xts_enc_8way_avx(struct serpent_ctx *ctx, u8 *dst,
					 const u8 *src, le128 *iv);
EXPORT_SYMBOL_GPL(serpent_xts_enc_8way_avx);

asmlinkage void serpent_xts_dec_8way_avx(struct serpent_ctx *ctx, u8 *dst,
					 const u8 *src, le128 *iv);
EXPORT_SYMBOL_GPL(serpent_xts_dec_8way_avx);

void __serpent_crypt_ctr(void *ctx, u128 *dst, const u128 *src, le128 *iv)
{
	be128 ctrblk;

	le128_to_be128(&ctrblk, iv);
	le128_inc(iv);

	__serpent_encrypt(ctx, (u8 *)&ctrblk, (u8 *)&ctrblk);
	u128_xor(dst, src, (u128 *)&ctrblk);
}
EXPORT_SYMBOL_GPL(__serpent_crypt_ctr);

void serpent_xts_enc(void *ctx, u128 *dst, const u128 *src, le128 *iv)
{
	glue_xts_crypt_128bit_one(ctx, dst, src, iv,
				  GLUE_FUNC_CAST(__serpent_encrypt));
}
EXPORT_SYMBOL_GPL(serpent_xts_enc);

void serpent_xts_dec(void *ctx, u128 *dst, const u128 *src, le128 *iv)
{
	glue_xts_crypt_128bit_one(ctx, dst, src, iv,
				  GLUE_FUNC_CAST(__serpent_decrypt));
}
EXPORT_SYMBOL_GPL(serpent_xts_dec);


static const struct common_glue_ctx serpent_enc = {
	.num_funcs = 2,
	.fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS,

	.funcs = { {
		.num_blocks = SERPENT_PARALLEL_BLOCKS,
		.fn_u = { .ecb = GLUE_FUNC_CAST(serpent_ecb_enc_8way_avx) }
	}, {
		.num_blocks = 1,
		.fn_u = { .ecb = GLUE_FUNC_CAST(__serpent_encrypt) }
	} }
};

static const struct common_glue_ctx serpent_ctr = {
	.num_funcs = 2,
	.fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS,

	.funcs = { {
		.num_blocks = SERPENT_PARALLEL_BLOCKS,
		.fn_u = { .ctr = GLUE_CTR_FUNC_CAST(serpent_ctr_8way_avx) }
	}, {
		.num_blocks = 1,
		.fn_u = { .ctr = GLUE_CTR_FUNC_CAST(__serpent_crypt_ctr) }
	} }
};

static const struct common_glue_ctx serpent_enc_xts = {
	.num_funcs = 2,
	.fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS,

	.funcs = { {
		.num_blocks = SERPENT_PARALLEL_BLOCKS,
		.fn_u = { .xts = GLUE_XTS_FUNC_CAST(serpent_xts_enc_8way_avx) }
	}, {
		.num_blocks = 1,
		.fn_u = { .xts = GLUE_XTS_FUNC_CAST(serpent_xts_enc) }
	} }
};

static const struct common_glue_ctx serpent_dec = {
	.num_funcs = 2,
	.fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS,

	.funcs = { {
		.num_blocks = SERPENT_PARALLEL_BLOCKS,
		.fn_u = { .ecb = GLUE_FUNC_CAST(serpent_ecb_dec_8way_avx) }
	}, {
		.num_blocks = 1,
		.fn_u = { .ecb = GLUE_FUNC_CAST(__serpent_decrypt) }
	} }
};

static const struct common_glue_ctx serpent_dec_cbc = {
	.num_funcs = 2,
	.fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS,

	.funcs = { {
		.num_blocks = SERPENT_PARALLEL_BLOCKS,
		.fn_u = { .cbc = GLUE_CBC_FUNC_CAST(serpent_cbc_dec_8way_avx) }
	}, {
		.num_blocks = 1,
		.fn_u = { .cbc = GLUE_CBC_FUNC_CAST(__serpent_decrypt) }
	} }
};

static const struct common_glue_ctx serpent_dec_xts = {
	.num_funcs = 2,
	.fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS,

	.funcs = { {
		.num_blocks = SERPENT_PARALLEL_BLOCKS,
		.fn_u = { .xts = GLUE_XTS_FUNC_CAST(serpent_xts_dec_8way_avx) }
	}, {
		.num_blocks = 1,
		.fn_u = { .xts = GLUE_XTS_FUNC_CAST(serpent_xts_dec) }
	} }
};

static int ecb_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
		       struct scatterlist *src, unsigned int nbytes)
{
	return glue_ecb_crypt_128bit(&serpent_enc, desc, dst, src, nbytes);
}

static int ecb_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
		       struct scatterlist *src, unsigned int nbytes)
{
	return glue_ecb_crypt_128bit(&serpent_dec, desc, dst, src, nbytes);
}

static int cbc_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
		       struct scatterlist *src, unsigned int nbytes)
{
	return glue_cbc_encrypt_128bit(GLUE_FUNC_CAST(__serpent_encrypt), desc,
				     dst, src, nbytes);
}

static int cbc_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
		       struct scatterlist *src, unsigned int nbytes)
{
	return glue_cbc_decrypt_128bit(&serpent_dec_cbc, desc, dst, src,
				       nbytes);
}

static int ctr_crypt(struct blkcipher_desc *desc, struct scatterlist *dst,
		     struct scatterlist *src, unsigned int nbytes)
{
	return glue_ctr_crypt_128bit(&serpent_ctr, desc, dst, src, nbytes);
}

static inline bool serpent_fpu_begin(bool fpu_enabled, unsigned int nbytes)
{
	return glue_fpu_begin(SERPENT_BLOCK_SIZE, SERPENT_PARALLEL_BLOCKS,
			      NULL, fpu_enabled, nbytes);
}

static inline void serpent_fpu_end(bool fpu_enabled)
{
	glue_fpu_end(fpu_enabled);
}

struct crypt_priv {
	struct serpent_ctx *ctx;
	bool fpu_enabled;
};

static void encrypt_callback(void *priv, u8 *srcdst, unsigned int nbytes)
{
	const unsigned int bsize = SERPENT_BLOCK_SIZE;
	struct crypt_priv *ctx = priv;
	int i;

	ctx->fpu_enabled = serpent_fpu_begin(ctx->fpu_enabled, nbytes);

	if (nbytes == bsize * SERPENT_PARALLEL_BLOCKS) {
		serpent_ecb_enc_8way_avx(ctx->ctx, srcdst, srcdst);
		return;
	}

	for (i = 0; i < nbytes / bsize; i++, srcdst += bsize)
		__serpent_encrypt(ctx->ctx, srcdst, srcdst);
}

static void decrypt_callback(void *priv, u8 *srcdst, unsigned int nbytes)
{
	const unsigned int bsize = SERPENT_BLOCK_SIZE;
	struct crypt_priv *ctx = priv;
	int i;

	ctx->fpu_enabled = serpent_fpu_begin(ctx->fpu_enabled, nbytes);

	if (nbytes == bsize * SERPENT_PARALLEL_BLOCKS) {
		serpent_ecb_dec_8way_avx(ctx->ctx, srcdst, srcdst);
		return;
	}

	for (i = 0; i < nbytes / bsize; i++, srcdst += bsize)
		__serpent_decrypt(ctx->ctx, srcdst, srcdst);
}

int lrw_serpent_setkey(struct crypto_tfm *tfm, const u8 *key,
		       unsigned int keylen)
{
	struct serpent_lrw_ctx *ctx = crypto_tfm_ctx(tfm);
	int err;

	err = __serpent_setkey(&ctx->serpent_ctx, key, keylen -
							SERPENT_BLOCK_SIZE);
	if (err)
		return err;

	return lrw_init_table(&ctx->lrw_table, key + keylen -
						SERPENT_BLOCK_SIZE);
}
EXPORT_SYMBOL_GPL(lrw_serpent_setkey);

static int lrw_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
		       struct scatterlist *src, unsigned int nbytes)
{
	struct serpent_lrw_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
	be128 buf[SERPENT_PARALLEL_BLOCKS];
	struct crypt_priv crypt_ctx = {
		.ctx = &ctx->serpent_ctx,
		.fpu_enabled = false,
	};
	struct lrw_crypt_req req = {
		.tbuf = buf,
		.tbuflen = sizeof(buf),

		.table_ctx = &ctx->lrw_table,
		.crypt_ctx = &crypt_ctx,
		.crypt_fn = encrypt_callback,
	};
	int ret;

	desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
	ret = lrw_crypt(desc, dst, src, nbytes, &req);
	serpent_fpu_end(crypt_ctx.fpu_enabled);

	return ret;
}

static int lrw_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
		       struct scatterlist *src, unsigned int nbytes)
{
	struct serpent_lrw_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
	be128 buf[SERPENT_PARALLEL_BLOCKS];
	struct crypt_priv crypt_ctx = {
		.ctx = &ctx->serpent_ctx,
		.fpu_enabled = false,
	};
	struct lrw_crypt_req req = {
		.tbuf = buf,
		.tbuflen = sizeof(buf),

		.table_ctx = &ctx->lrw_table,
		.crypt_ctx = &crypt_ctx,
		.crypt_fn = decrypt_callback,
	};
	int ret;

	desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
	ret = lrw_crypt(desc, dst, src, nbytes, &req);
	serpent_fpu_end(crypt_ctx.fpu_enabled);

	return ret;
}

void lrw_serpent_exit_tfm(struct crypto_tfm *tfm)
{
	struct serpent_lrw_ctx *ctx = crypto_tfm_ctx(tfm);

	lrw_free_table(&ctx->lrw_table);
}
EXPORT_SYMBOL_GPL(lrw_serpent_exit_tfm);

int xts_serpent_setkey(struct crypto_tfm *tfm, const u8 *key,
		       unsigned int keylen)
{
	struct serpent_xts_ctx *ctx = crypto_tfm_ctx(tfm);
	u32 *flags = &tfm->crt_flags;
	int err;

	/* key consists of keys of equal size concatenated, therefore
	 * the length must be even
	 */
	if (keylen % 2) {
		*flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
		return -EINVAL;
	}

	/* first half of xts-key is for crypt */
	err = __serpent_setkey(&ctx->crypt_ctx, key, keylen / 2);
	if (err)
		return err;

	/* second half of xts-key is for tweak */
	return __serpent_setkey(&ctx->tweak_ctx, key + keylen / 2, keylen / 2);
}
EXPORT_SYMBOL_GPL(xts_serpent_setkey);

static int xts_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
		       struct scatterlist *src, unsigned int nbytes)
{
	struct serpent_xts_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);

	return glue_xts_crypt_128bit(&serpent_enc_xts, desc, dst, src, nbytes,
				     XTS_TWEAK_CAST(__serpent_encrypt),
				     &ctx->tweak_ctx, &ctx->crypt_ctx);
}

static int xts_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
		       struct scatterlist *src, unsigned int nbytes)
{
	struct serpent_xts_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);

	return glue_xts_crypt_128bit(&serpent_dec_xts, desc, dst, src, nbytes,
				     XTS_TWEAK_CAST(__serpent_encrypt),
				     &ctx->tweak_ctx, &ctx->crypt_ctx);
}

static struct crypto_alg serpent_algs[10] = { {
	.cra_name		= "__ecb-serpent-avx",
	.cra_driver_name	= "__driver-ecb-serpent-avx",
	.cra_priority		= 0,
	.cra_flags		= CRYPTO_ALG_TYPE_BLKCIPHER |
				  CRYPTO_ALG_INTERNAL,
	.cra_blocksize		= SERPENT_BLOCK_SIZE,
	.cra_ctxsize		= sizeof(struct serpent_ctx),
	.cra_alignmask		= 0,
	.cra_type		= &crypto_blkcipher_type,
	.cra_module		= THIS_MODULE,
	.cra_u = {
		.blkcipher = {
			.min_keysize	= SERPENT_MIN_KEY_SIZE,
			.max_keysize	= SERPENT_MAX_KEY_SIZE,
			.setkey		= serpent_setkey,
			.encrypt	= ecb_encrypt,
			.decrypt	= ecb_decrypt,
		},
	},
}, {
	.cra_name		= "__cbc-serpent-avx",
	.cra_driver_name	= "__driver-cbc-serpent-avx",
	.cra_priority		= 0,
	.cra_flags		= CRYPTO_ALG_TYPE_BLKCIPHER |
				  CRYPTO_ALG_INTERNAL,
	.cra_blocksize		= SERPENT_BLOCK_SIZE,
	.cra_ctxsize		= sizeof(struct serpent_ctx),
	.cra_alignmask		= 0,
	.cra_type		= &crypto_blkcipher_type,
	.cra_module		= THIS_MODULE,
	.cra_u = {
		.blkcipher = {
			.min_keysize	= SERPENT_MIN_KEY_SIZE,
			.max_keysize	= SERPENT_MAX_KEY_SIZE,
			.setkey		= serpent_setkey,
			.encrypt	= cbc_encrypt,
			.decrypt	= cbc_decrypt,
		},
	},
}, {
	.cra_name		= "__ctr-serpent-avx",
	.cra_driver_name	= "__driver-ctr-serpent-avx",
	.cra_priority		= 0,
	.cra_flags		= CRYPTO_ALG_TYPE_BLKCIPHER |
				  CRYPTO_ALG_INTERNAL,
	.cra_blocksize		= 1,
	.cra_ctxsize		= sizeof(struct serpent_ctx),
	.cra_alignmask		= 0,
	.cra_type		= &crypto_blkcipher_type,
	.cra_module		= THIS_MODULE,
	.cra_u = {
		.blkcipher = {
			.min_keysize	= SERPENT_MIN_KEY_SIZE,
			.max_keysize	= SERPENT_MAX_KEY_SIZE,
			.ivsize		= SERPENT_BLOCK_SIZE,
			.setkey		= serpent_setkey,
			.encrypt	= ctr_crypt,
			.decrypt	= ctr_crypt,
		},
	},
}, {
	.cra_name		= "__lrw-serpent-avx",
	.cra_driver_name	= "__driver-lrw-serpent-avx",
	.cra_priority		= 0,
	.cra_flags		= CRYPTO_ALG_TYPE_BLKCIPHER |
				  CRYPTO_ALG_INTERNAL,
	.cra_blocksize		= SERPENT_BLOCK_SIZE,
	.cra_ctxsize		= sizeof(struct serpent_lrw_ctx),
	.cra_alignmask		= 0,
	.cra_type		= &crypto_blkcipher_type,
	.cra_module		= THIS_MODULE,
	.cra_exit		= lrw_serpent_exit_tfm,
	.cra_u = {
		.blkcipher = {
			.min_keysize	= SERPENT_MIN_KEY_SIZE +
					  SERPENT_BLOCK_SIZE,
			.max_keysize	= SERPENT_MAX_KEY_SIZE +
					  SERPENT_BLOCK_SIZE,
			.ivsize		= SERPENT_BLOCK_SIZE,
			.setkey		= lrw_serpent_setkey,
			.encrypt	= lrw_encrypt,
			.decrypt	= lrw_decrypt,
		},
	},
}, {
	.cra_name		= "__xts-serpent-avx",
	.cra_driver_name	= "__driver-xts-serpent-avx",
	.cra_priority		= 0,
	.cra_flags		= CRYPTO_ALG_TYPE_BLKCIPHER |
				  CRYPTO_ALG_INTERNAL,
	.cra_blocksize		= SERPENT_BLOCK_SIZE,
	.cra_ctxsize		= sizeof(struct serpent_xts_ctx),
	.cra_alignmask		= 0,
	.cra_type		= &crypto_blkcipher_type,
	.cra_module		= THIS_MODULE,
	.cra_u = {
		.blkcipher = {
			.min_keysize	= SERPENT_MIN_KEY_SIZE * 2,
			.max_keysize	= SERPENT_MAX_KEY_SIZE * 2,
			.ivsize		= SERPENT_BLOCK_SIZE,
			.setkey		= xts_serpent_setkey,
			.encrypt	= xts_encrypt,
			.decrypt	= xts_decrypt,
		},
	},
}, {
	.cra_name		= "ecb(serpent)",
	.cra_driver_name	= "ecb-serpent-avx",
	.cra_priority		= 500,
	.cra_flags		= CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
	.cra_blocksize		= SERPENT_BLOCK_SIZE,
	.cra_ctxsize		= sizeof(struct async_helper_ctx),
	.cra_alignmask		= 0,
	.cra_type		= &crypto_ablkcipher_type,
	.cra_module		= THIS_MODULE,
	.cra_init		= ablk_init,
	.cra_exit		= ablk_exit,
	.cra_u = {
		.ablkcipher = {
			.min_keysize	= SERPENT_MIN_KEY_SIZE,
			.max_keysize	= SERPENT_MAX_KEY_SIZE,
			.setkey		= ablk_set_key,
			.encrypt	= ablk_encrypt,
			.decrypt	= ablk_decrypt,
		},
	},
}, {
	.cra_name		= "cbc(serpent)",
	.cra_driver_name	= "cbc-serpent-avx",
	.cra_priority		= 500,
	.cra_flags		= CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
	.cra_blocksize		= SERPENT_BLOCK_SIZE,
	.cra_ctxsize		= sizeof(struct async_helper_ctx),
	.cra_alignmask		= 0,
	.cra_type		= &crypto_ablkcipher_type,
	.cra_module		= THIS_MODULE,
	.cra_init		= ablk_init,
	.cra_exit		= ablk_exit,
	.cra_u = {
		.ablkcipher = {
			.min_keysize	= SERPENT_MIN_KEY_SIZE,
			.max_keysize	= SERPENT_MAX_KEY_SIZE,
			.ivsize		= SERPENT_BLOCK_SIZE,
			.setkey		= ablk_set_key,
			.encrypt	= __ablk_encrypt,
			.decrypt	= ablk_decrypt,
		},
	},
}, {
	.cra_name		= "ctr(serpent)",
	.cra_driver_name	= "ctr-serpent-avx",
	.cra_priority		= 500,
	.cra_flags		= CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
	.cra_blocksize		= 1,
	.cra_ctxsize		= sizeof(struct async_helper_ctx),
	.cra_alignmask		= 0,
	.cra_type		= &crypto_ablkcipher_type,
	.cra_module		= THIS_MODULE,
	.cra_init		= ablk_init,
	.cra_exit		= ablk_exit,
	.cra_u = {
		.ablkcipher = {
			.min_keysize	= SERPENT_MIN_KEY_SIZE,
			.max_keysize	= SERPENT_MAX_KEY_SIZE,
			.ivsize		= SERPENT_BLOCK_SIZE,
			.setkey		= ablk_set_key,
			.encrypt	= ablk_encrypt,
			.decrypt	= ablk_encrypt,
			.geniv		= "chainiv",
		},
	},
}, {
	.cra_name		= "lrw(serpent)",
	.cra_driver_name	= "lrw-serpent-avx",
	.cra_priority		= 500,
	.cra_flags		= CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
	.cra_blocksize		= SERPENT_BLOCK_SIZE,
	.cra_ctxsize		= sizeof(struct async_helper_ctx),
	.cra_alignmask		= 0,
	.cra_type		= &crypto_ablkcipher_type,
	.cra_module		= THIS_MODULE,
	.cra_init		= ablk_init,
	.cra_exit		= ablk_exit,
	.cra_u = {
		.ablkcipher = {
			.min_keysize	= SERPENT_MIN_KEY_SIZE +
					  SERPENT_BLOCK_SIZE,
			.max_keysize	= SERPENT_MAX_KEY_SIZE +
					  SERPENT_BLOCK_SIZE,
			.ivsize		= SERPENT_BLOCK_SIZE,
			.setkey		= ablk_set_key,
			.encrypt	= ablk_encrypt,
			.decrypt	= ablk_decrypt,
		},
	},
}, {
	.cra_name		= "xts(serpent)",
	.cra_driver_name	= "xts-serpent-avx",
	.cra_priority		= 500,
	.cra_flags		= CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
	.cra_blocksize		= SERPENT_BLOCK_SIZE,
	.cra_ctxsize		= sizeof(struct async_helper_ctx),
	.cra_alignmask		= 0,
	.cra_type		= &crypto_ablkcipher_type,
	.cra_module		= THIS_MODULE,
	.cra_init		= ablk_init,
	.cra_exit		= ablk_exit,
	.cra_u = {
		.ablkcipher = {
			.min_keysize	= SERPENT_MIN_KEY_SIZE * 2,
			.max_keysize	= SERPENT_MAX_KEY_SIZE * 2,
			.ivsize		= SERPENT_BLOCK_SIZE,
			.setkey		= ablk_set_key,
			.encrypt	= ablk_encrypt,
			.decrypt	= ablk_decrypt,
		},
	},
} };

static int __init serpent_init(void)
{
	const char *feature_name;

	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_algs(serpent_algs, ARRAY_SIZE(serpent_algs));
}

static void __exit serpent_exit(void)
{
	crypto_unregister_algs(serpent_algs, ARRAY_SIZE(serpent_algs));
}

module_init(serpent_init);
module_exit(serpent_exit);

MODULE_DESCRIPTION("Serpent Cipher Algorithm, AVX optimized");
MODULE_LICENSE("GPL");
MODULE_ALIAS_CRYPTO("serpent");
Commit	Line	Data
7efe4076 JG	1	/*
	2	* Glue Code for AVX assembler versions of Serpent Cipher
	3	*
	4	* Copyright (C) 2012 Johannes Goetzfried
	5	* <Johannes.Goetzfried@informatik.stud.uni-erlangen.de>
	6	*
a05248ed	7	* Copyright © 2011-2013 Jussi Kivilinna <jussi.kivilinna@iki.fi>
7efe4076 JG	8	*
	9	* This program is free software; you can redistribute it and/or modify
	10	* it under the terms of the GNU General Public License as published by
	11	* the Free Software Foundation; either version 2 of the License, or
	12	* (at your option) any later version.
	13	*
	14	* This program is distributed in the hope that it will be useful,
	15	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	17	* GNU General Public License for more details.
	18	*
	19	* You should have received a copy of the GNU General Public License
	20	* along with this program; if not, write to the Free Software
	21	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
	22	* USA
	23	*
	24	*/
	25
	26	#include <linux/module.h>
	27	#include <linux/hardirq.h>
	28	#include <linux/types.h>
	29	#include <linux/crypto.h>
	30	#include <linux/err.h>
801201aa	31	#include <crypto/ablk_helper.h>
7efe4076 JG	32	#include <crypto/algapi.h>
	33	#include <crypto/serpent.h>
	34	#include <crypto/cryptd.h>
	35	#include <crypto/b128ops.h>
	36	#include <crypto/ctr.h>
	37	#include <crypto/lrw.h>
	38	#include <crypto/xts.h>
c1c23f7e	39	#include <asm/fpu/api.h>
d4af0e9d	40	#include <asm/crypto/serpent-avx.h>
1d0debbd	41	#include <asm/crypto/glue_helper.h>
7efe4076	42
56d76c96 JK	43	/* 8-way parallel cipher functions */
	44	asmlinkage void serpent_ecb_enc_8way_avx(struct serpent_ctx ctx, u8 dst,
	45	const u8 *src);
	46	EXPORT_SYMBOL_GPL(serpent_ecb_enc_8way_avx);
	47
	48	asmlinkage void serpent_ecb_dec_8way_avx(struct serpent_ctx ctx, u8 dst,
	49	const u8 *src);
	50	EXPORT_SYMBOL_GPL(serpent_ecb_dec_8way_avx);
	51
	52	asmlinkage void serpent_cbc_dec_8way_avx(struct serpent_ctx ctx, u8 dst,
	53	const u8 *src);
	54	EXPORT_SYMBOL_GPL(serpent_cbc_dec_8way_avx);
	55
	56	asmlinkage void serpent_ctr_8way_avx(struct serpent_ctx ctx, u8 dst,
	57	const u8 src, le128 iv);
	58	EXPORT_SYMBOL_GPL(serpent_ctr_8way_avx);
	59
	60	asmlinkage void serpent_xts_enc_8way_avx(struct serpent_ctx ctx, u8 dst,
	61	const u8 src, le128 iv);
	62	EXPORT_SYMBOL_GPL(serpent_xts_enc_8way_avx);
	63
	64	asmlinkage void serpent_xts_dec_8way_avx(struct serpent_ctx ctx, u8 dst,
	65	const u8 src, le128 iv);
	66	EXPORT_SYMBOL_GPL(serpent_xts_dec_8way_avx);
	67
	68	void __serpent_crypt_ctr(void ctx, u128 dst, const u128 src, le128 iv)
7efe4076	69	{
1d0debbd	70	be128 ctrblk;
7efe4076	71
58990986 JK	72	le128_to_be128(&ctrblk, iv);
58990986 JK	73	le128_inc(iv);
7efe4076	74
1d0debbd JK	75	__serpent_encrypt(ctx, (u8 )&ctrblk, (u8 )&ctrblk);
1d0debbd JK	76	u128_xor(dst, src, (u128 *)&ctrblk);
7efe4076	77	}
56d76c96	78	EXPORT_SYMBOL_GPL(__serpent_crypt_ctr);
7efe4076	79
56d76c96	80	void serpent_xts_enc(void ctx, u128 dst, const u128 src, le128 iv)
a05248ed JK	81	{
	82	glue_xts_crypt_128bit_one(ctx, dst, src, iv,
	83	GLUE_FUNC_CAST(__serpent_encrypt));
	84	}
56d76c96	85	EXPORT_SYMBOL_GPL(serpent_xts_enc);
a05248ed	86
56d76c96	87	void serpent_xts_dec(void ctx, u128 dst, const u128 src, le128 iv)
a05248ed JK	88	{
	89	glue_xts_crypt_128bit_one(ctx, dst, src, iv,
	90	GLUE_FUNC_CAST(__serpent_decrypt));
	91	}
56d76c96 JK	92	EXPORT_SYMBOL_GPL(serpent_xts_dec);
56d76c96 JK	93
a05248ed	94
1d0debbd JK	95	static const struct common_glue_ctx serpent_enc = {
	96	.num_funcs = 2,
	97	.fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS,
7efe4076	98
1d0debbd JK	99	.funcs = { {
1d0debbd JK	100	.num_blocks = SERPENT_PARALLEL_BLOCKS,
facd416f	101	.fn_u = { .ecb = GLUE_FUNC_CAST(serpent_ecb_enc_8way_avx) }
1d0debbd JK	102	}, {
	103	.num_blocks = 1,
	104	.fn_u = { .ecb = GLUE_FUNC_CAST(__serpent_encrypt) }
	105	} }
	106	};
7efe4076	107
1d0debbd JK	108	static const struct common_glue_ctx serpent_ctr = {
	109	.num_funcs = 2,
	110	.fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS,
	111
	112	.funcs = { {
	113	.num_blocks = SERPENT_PARALLEL_BLOCKS,
facd416f	114	.fn_u = { .ctr = GLUE_CTR_FUNC_CAST(serpent_ctr_8way_avx) }
1d0debbd JK	115	}, {
1d0debbd JK	116	.num_blocks = 1,
56d76c96	117	.fn_u = { .ctr = GLUE_CTR_FUNC_CAST(__serpent_crypt_ctr) }
1d0debbd JK	118	} }
1d0debbd JK	119	};
7efe4076	120
a05248ed JK	121	static const struct common_glue_ctx serpent_enc_xts = {
	122	.num_funcs = 2,
	123	.fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS,
	124
	125	.funcs = { {
	126	.num_blocks = SERPENT_PARALLEL_BLOCKS,
	127	.fn_u = { .xts = GLUE_XTS_FUNC_CAST(serpent_xts_enc_8way_avx) }
	128	}, {
	129	.num_blocks = 1,
	130	.fn_u = { .xts = GLUE_XTS_FUNC_CAST(serpent_xts_enc) }
	131	} }
	132	};
	133
1d0debbd JK	134	static const struct common_glue_ctx serpent_dec = {
	135	.num_funcs = 2,
	136	.fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS,
	137
	138	.funcs = { {
	139	.num_blocks = SERPENT_PARALLEL_BLOCKS,
facd416f	140	.fn_u = { .ecb = GLUE_FUNC_CAST(serpent_ecb_dec_8way_avx) }
1d0debbd JK	141	}, {
	142	.num_blocks = 1,
	143	.fn_u = { .ecb = GLUE_FUNC_CAST(__serpent_decrypt) }
	144	} }
	145	};
7efe4076	146
1d0debbd JK	147	static const struct common_glue_ctx serpent_dec_cbc = {
	148	.num_funcs = 2,
	149	.fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS,
	150
	151	.funcs = { {
	152	.num_blocks = SERPENT_PARALLEL_BLOCKS,
facd416f	153	.fn_u = { .cbc = GLUE_CBC_FUNC_CAST(serpent_cbc_dec_8way_avx) }
1d0debbd JK	154	}, {
	155	.num_blocks = 1,
	156	.fn_u = { .cbc = GLUE_CBC_FUNC_CAST(__serpent_decrypt) }
	157	} }
	158	};
7efe4076	159
a05248ed JK	160	static const struct common_glue_ctx serpent_dec_xts = {
	161	.num_funcs = 2,
	162	.fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS,
	163
	164	.funcs = { {
	165	.num_blocks = SERPENT_PARALLEL_BLOCKS,
	166	.fn_u = { .xts = GLUE_XTS_FUNC_CAST(serpent_xts_dec_8way_avx) }
	167	}, {
	168	.num_blocks = 1,
	169	.fn_u = { .xts = GLUE_XTS_FUNC_CAST(serpent_xts_dec) }
	170	} }
	171	};
	172
1d0debbd	173	static int ecb_encrypt(struct blkcipher_desc desc, struct scatterlist dst,
7efe4076 JG	174	struct scatterlist *src, unsigned int nbytes)
7efe4076 JG	175	{
1d0debbd	176	return glue_ecb_crypt_128bit(&serpent_enc, desc, dst, src, nbytes);
7efe4076 JG	177	}
7efe4076 JG	178
1d0debbd JK	179	static int ecb_decrypt(struct blkcipher_desc desc, struct scatterlist dst,
1d0debbd JK	180	struct scatterlist *src, unsigned int nbytes)
7efe4076	181	{
1d0debbd	182	return glue_ecb_crypt_128bit(&serpent_dec, desc, dst, src, nbytes);
7efe4076 JG	183	}
7efe4076 JG	184
1d0debbd JK	185	static int cbc_encrypt(struct blkcipher_desc desc, struct scatterlist dst,
1d0debbd JK	186	struct scatterlist *src, unsigned int nbytes)
7efe4076	187	{
1d0debbd JK	188	return glue_cbc_encrypt_128bit(GLUE_FUNC_CAST(__serpent_encrypt), desc,
1d0debbd JK	189	dst, src, nbytes);
7efe4076 JG	190	}
7efe4076 JG	191
1d0debbd JK	192	static int cbc_decrypt(struct blkcipher_desc desc, struct scatterlist dst,
1d0debbd JK	193	struct scatterlist *src, unsigned int nbytes)
7efe4076	194	{
1d0debbd JK	195	return glue_cbc_decrypt_128bit(&serpent_dec_cbc, desc, dst, src,
1d0debbd JK	196	nbytes);
7efe4076 JG	197	}
7efe4076 JG	198
1d0debbd JK	199	static int ctr_crypt(struct blkcipher_desc desc, struct scatterlist dst,
1d0debbd JK	200	struct scatterlist *src, unsigned int nbytes)
7efe4076	201	{
1d0debbd	202	return glue_ctr_crypt_128bit(&serpent_ctr, desc, dst, src, nbytes);
7efe4076 JG	203	}
7efe4076 JG	204
1d0debbd	205	static inline bool serpent_fpu_begin(bool fpu_enabled, unsigned int nbytes)
7efe4076	206	{
1d0debbd JK	207	return glue_fpu_begin(SERPENT_BLOCK_SIZE, SERPENT_PARALLEL_BLOCKS,
1d0debbd JK	208	NULL, fpu_enabled, nbytes);
7efe4076 JG	209	}
7efe4076 JG	210
1d0debbd	211	static inline void serpent_fpu_end(bool fpu_enabled)
7efe4076	212	{
1d0debbd	213	glue_fpu_end(fpu_enabled);
7efe4076 JG	214	}
	215
	216	struct crypt_priv {
	217	struct serpent_ctx *ctx;
	218	bool fpu_enabled;
	219	};
	220
	221	static void encrypt_callback(void priv, u8 srcdst, unsigned int nbytes)
	222	{
	223	const unsigned int bsize = SERPENT_BLOCK_SIZE;
	224	struct crypt_priv *ctx = priv;
	225	int i;
	226
	227	ctx->fpu_enabled = serpent_fpu_begin(ctx->fpu_enabled, nbytes);
	228
	229	if (nbytes == bsize * SERPENT_PARALLEL_BLOCKS) {
facd416f	230	serpent_ecb_enc_8way_avx(ctx->ctx, srcdst, srcdst);
7efe4076 JG	231	return;
	232	}
	233
	234	for (i = 0; i < nbytes / bsize; i++, srcdst += bsize)
	235	__serpent_encrypt(ctx->ctx, srcdst, srcdst);
	236	}
	237
	238	static void decrypt_callback(void priv, u8 srcdst, unsigned int nbytes)
	239	{
	240	const unsigned int bsize = SERPENT_BLOCK_SIZE;
	241	struct crypt_priv *ctx = priv;
	242	int i;
	243
	244	ctx->fpu_enabled = serpent_fpu_begin(ctx->fpu_enabled, nbytes);
	245
	246	if (nbytes == bsize * SERPENT_PARALLEL_BLOCKS) {
facd416f	247	serpent_ecb_dec_8way_avx(ctx->ctx, srcdst, srcdst);
7efe4076 JG	248	return;
	249	}
	250
	251	for (i = 0; i < nbytes / bsize; i++, srcdst += bsize)
	252	__serpent_decrypt(ctx->ctx, srcdst, srcdst);
	253	}
	254
56d76c96 JK	255	int lrw_serpent_setkey(struct crypto_tfm tfm, const u8 key,
56d76c96 JK	256	unsigned int keylen)
7efe4076 JG	257	{
	258	struct serpent_lrw_ctx *ctx = crypto_tfm_ctx(tfm);
	259	int err;
	260
	261	err = __serpent_setkey(&ctx->serpent_ctx, key, keylen -
	262	SERPENT_BLOCK_SIZE);
	263	if (err)
	264	return err;
	265
	266	return lrw_init_table(&ctx->lrw_table, key + keylen -
	267	SERPENT_BLOCK_SIZE);
	268	}
56d76c96	269	EXPORT_SYMBOL_GPL(lrw_serpent_setkey);
7efe4076 JG	270
	271	static int lrw_encrypt(struct blkcipher_desc desc, struct scatterlist dst,
	272	struct scatterlist *src, unsigned int nbytes)
	273	{
	274	struct serpent_lrw_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
	275	be128 buf[SERPENT_PARALLEL_BLOCKS];
	276	struct crypt_priv crypt_ctx = {
	277	.ctx = &ctx->serpent_ctx,
	278	.fpu_enabled = false,
	279	};
	280	struct lrw_crypt_req req = {
	281	.tbuf = buf,
	282	.tbuflen = sizeof(buf),
	283
	284	.table_ctx = &ctx->lrw_table,
	285	.crypt_ctx = &crypt_ctx,
	286	.crypt_fn = encrypt_callback,
	287	};
	288	int ret;
	289
	290	desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
	291	ret = lrw_crypt(desc, dst, src, nbytes, &req);
	292	serpent_fpu_end(crypt_ctx.fpu_enabled);
	293
	294	return ret;
	295	}
	296
	297	static int lrw_decrypt(struct blkcipher_desc desc, struct scatterlist dst,
	298	struct scatterlist *src, unsigned int nbytes)
	299	{
	300	struct serpent_lrw_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
	301	be128 buf[SERPENT_PARALLEL_BLOCKS];
	302	struct crypt_priv crypt_ctx = {
	303	.ctx = &ctx->serpent_ctx,
	304	.fpu_enabled = false,
	305	};
	306	struct lrw_crypt_req req = {
	307	.tbuf = buf,
	308	.tbuflen = sizeof(buf),
	309
	310	.table_ctx = &ctx->lrw_table,
	311	.crypt_ctx = &crypt_ctx,
	312	.crypt_fn = decrypt_callback,
	313	};
	314	int ret;
	315
	316	desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
	317	ret = lrw_crypt(desc, dst, src, nbytes, &req);
	318	serpent_fpu_end(crypt_ctx.fpu_enabled);
	319
	320	return ret;
	321	}
	322
56d76c96	323	void lrw_serpent_exit_tfm(struct crypto_tfm *tfm)
7efe4076 JG	324	{
	325	struct serpent_lrw_ctx *ctx = crypto_tfm_ctx(tfm);
	326
	327	lrw_free_table(&ctx->lrw_table);
	328	}
56d76c96	329	EXPORT_SYMBOL_GPL(lrw_serpent_exit_tfm);
7efe4076	330
56d76c96 JK	331	int xts_serpent_setkey(struct crypto_tfm tfm, const u8 key,
56d76c96 JK	332	unsigned int keylen)
7efe4076 JG	333	{
	334	struct serpent_xts_ctx *ctx = crypto_tfm_ctx(tfm);
	335	u32 *flags = &tfm->crt_flags;
	336	int err;
	337
	338	/* key consists of keys of equal size concatenated, therefore
	339	* the length must be even
	340	*/
	341	if (keylen % 2) {
	342	*flags \|= CRYPTO_TFM_RES_BAD_KEY_LEN;
	343	return -EINVAL;
	344	}
	345
	346	/* first half of xts-key is for crypt */
	347	err = __serpent_setkey(&ctx->crypt_ctx, key, keylen / 2);
	348	if (err)
	349	return err;
	350
	351	/* second half of xts-key is for tweak */
	352	return __serpent_setkey(&ctx->tweak_ctx, key + keylen / 2, keylen / 2);
	353	}
56d76c96	354	EXPORT_SYMBOL_GPL(xts_serpent_setkey);
7efe4076 JG	355
	356	static int xts_encrypt(struct blkcipher_desc desc, struct scatterlist dst,
	357	struct scatterlist *src, unsigned int nbytes)
	358	{
	359	struct serpent_xts_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
7efe4076	360
a05248ed JK	361	return glue_xts_crypt_128bit(&serpent_enc_xts, desc, dst, src, nbytes,
	362	XTS_TWEAK_CAST(__serpent_encrypt),
	363	&ctx->tweak_ctx, &ctx->crypt_ctx);
7efe4076 JG	364	}
	365
	366	static int xts_decrypt(struct blkcipher_desc desc, struct scatterlist dst,
	367	struct scatterlist *src, unsigned int nbytes)
	368	{
	369	struct serpent_xts_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
7efe4076	370
a05248ed JK	371	return glue_xts_crypt_128bit(&serpent_dec_xts, desc, dst, src, nbytes,
	372	XTS_TWEAK_CAST(__serpent_encrypt),
	373	&ctx->tweak_ctx, &ctx->crypt_ctx);
7efe4076 JG	374	}
7efe4076 JG	375
7efe4076 JG	376	static struct crypto_alg serpent_algs[10] = { {
	377	.cra_name = "__ecb-serpent-avx",
	378	.cra_driver_name = "__driver-ecb-serpent-avx",
	379	.cra_priority = 0,
65aed539 SM	380	.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER \|
65aed539 SM	381	CRYPTO_ALG_INTERNAL,
7efe4076 JG	382	.cra_blocksize = SERPENT_BLOCK_SIZE,
	383	.cra_ctxsize = sizeof(struct serpent_ctx),
	384	.cra_alignmask = 0,
	385	.cra_type = &crypto_blkcipher_type,
	386	.cra_module = THIS_MODULE,
7efe4076 JG	387	.cra_u = {
	388	.blkcipher = {
	389	.min_keysize = SERPENT_MIN_KEY_SIZE,
	390	.max_keysize = SERPENT_MAX_KEY_SIZE,
	391	.setkey = serpent_setkey,
	392	.encrypt = ecb_encrypt,
	393	.decrypt = ecb_decrypt,
	394	},
	395	},
	396	}, {
	397	.cra_name = "__cbc-serpent-avx",
	398	.cra_driver_name = "__driver-cbc-serpent-avx",
	399	.cra_priority = 0,
65aed539 SM	400	.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER \|
65aed539 SM	401	CRYPTO_ALG_INTERNAL,
7efe4076 JG	402	.cra_blocksize = SERPENT_BLOCK_SIZE,
	403	.cra_ctxsize = sizeof(struct serpent_ctx),
	404	.cra_alignmask = 0,
	405	.cra_type = &crypto_blkcipher_type,
	406	.cra_module = THIS_MODULE,
7efe4076 JG	407	.cra_u = {
	408	.blkcipher = {
	409	.min_keysize = SERPENT_MIN_KEY_SIZE,
	410	.max_keysize = SERPENT_MAX_KEY_SIZE,
	411	.setkey = serpent_setkey,
	412	.encrypt = cbc_encrypt,
	413	.decrypt = cbc_decrypt,
	414	},
	415	},
	416	}, {
	417	.cra_name = "__ctr-serpent-avx",
	418	.cra_driver_name = "__driver-ctr-serpent-avx",
	419	.cra_priority = 0,
65aed539 SM	420	.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER \|
65aed539 SM	421	CRYPTO_ALG_INTERNAL,
7efe4076 JG	422	.cra_blocksize = 1,
	423	.cra_ctxsize = sizeof(struct serpent_ctx),
	424	.cra_alignmask = 0,
	425	.cra_type = &crypto_blkcipher_type,
	426	.cra_module = THIS_MODULE,
7efe4076 JG	427	.cra_u = {
	428	.blkcipher = {
	429	.min_keysize = SERPENT_MIN_KEY_SIZE,
	430	.max_keysize = SERPENT_MAX_KEY_SIZE,
	431	.ivsize = SERPENT_BLOCK_SIZE,
	432	.setkey = serpent_setkey,
	433	.encrypt = ctr_crypt,
	434	.decrypt = ctr_crypt,
	435	},
	436	},
	437	}, {
	438	.cra_name = "__lrw-serpent-avx",
	439	.cra_driver_name = "__driver-lrw-serpent-avx",
	440	.cra_priority = 0,
65aed539 SM	441	.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER \|
65aed539 SM	442	CRYPTO_ALG_INTERNAL,
7efe4076 JG	443	.cra_blocksize = SERPENT_BLOCK_SIZE,
	444	.cra_ctxsize = sizeof(struct serpent_lrw_ctx),
	445	.cra_alignmask = 0,
	446	.cra_type = &crypto_blkcipher_type,
	447	.cra_module = THIS_MODULE,
56d76c96	448	.cra_exit = lrw_serpent_exit_tfm,
7efe4076 JG	449	.cra_u = {
	450	.blkcipher = {
	451	.min_keysize = SERPENT_MIN_KEY_SIZE +
	452	SERPENT_BLOCK_SIZE,
	453	.max_keysize = SERPENT_MAX_KEY_SIZE +
	454	SERPENT_BLOCK_SIZE,
	455	.ivsize = SERPENT_BLOCK_SIZE,
	456	.setkey = lrw_serpent_setkey,
	457	.encrypt = lrw_encrypt,
	458	.decrypt = lrw_decrypt,
	459	},
	460	},
	461	}, {
	462	.cra_name = "__xts-serpent-avx",
	463	.cra_driver_name = "__driver-xts-serpent-avx",
	464	.cra_priority = 0,
65aed539 SM	465	.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER \|
65aed539 SM	466	CRYPTO_ALG_INTERNAL,
7efe4076 JG	467	.cra_blocksize = SERPENT_BLOCK_SIZE,
	468	.cra_ctxsize = sizeof(struct serpent_xts_ctx),
	469	.cra_alignmask = 0,
	470	.cra_type = &crypto_blkcipher_type,
	471	.cra_module = THIS_MODULE,
7efe4076 JG	472	.cra_u = {
	473	.blkcipher = {
	474	.min_keysize = SERPENT_MIN_KEY_SIZE * 2,
	475	.max_keysize = SERPENT_MAX_KEY_SIZE * 2,
	476	.ivsize = SERPENT_BLOCK_SIZE,
	477	.setkey = xts_serpent_setkey,
	478	.encrypt = xts_encrypt,
	479	.decrypt = xts_decrypt,
	480	},
	481	},
	482	}, {
	483	.cra_name = "ecb(serpent)",
	484	.cra_driver_name = "ecb-serpent-avx",
	485	.cra_priority = 500,
	486	.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER \| CRYPTO_ALG_ASYNC,
	487	.cra_blocksize = SERPENT_BLOCK_SIZE,
ffaf9156	488	.cra_ctxsize = sizeof(struct async_helper_ctx),
7efe4076 JG	489	.cra_alignmask = 0,
	490	.cra_type = &crypto_ablkcipher_type,
	491	.cra_module = THIS_MODULE,
7efe4076 JG	492	.cra_init = ablk_init,
	493	.cra_exit = ablk_exit,
	494	.cra_u = {
	495	.ablkcipher = {
	496	.min_keysize = SERPENT_MIN_KEY_SIZE,
	497	.max_keysize = SERPENT_MAX_KEY_SIZE,
	498	.setkey = ablk_set_key,
	499	.encrypt = ablk_encrypt,
	500	.decrypt = ablk_decrypt,
	501	},
	502	},
	503	}, {
	504	.cra_name = "cbc(serpent)",
	505	.cra_driver_name = "cbc-serpent-avx",
	506	.cra_priority = 500,
	507	.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER \| CRYPTO_ALG_ASYNC,
	508	.cra_blocksize = SERPENT_BLOCK_SIZE,
ffaf9156	509	.cra_ctxsize = sizeof(struct async_helper_ctx),
7efe4076 JG	510	.cra_alignmask = 0,
	511	.cra_type = &crypto_ablkcipher_type,
	512	.cra_module = THIS_MODULE,
7efe4076 JG	513	.cra_init = ablk_init,
	514	.cra_exit = ablk_exit,
	515	.cra_u = {
	516	.ablkcipher = {
	517	.min_keysize = SERPENT_MIN_KEY_SIZE,
	518	.max_keysize = SERPENT_MAX_KEY_SIZE,
	519	.ivsize = SERPENT_BLOCK_SIZE,
	520	.setkey = ablk_set_key,
	521	.encrypt = __ablk_encrypt,
	522	.decrypt = ablk_decrypt,
	523	},
	524	},
	525	}, {
	526	.cra_name = "ctr(serpent)",
	527	.cra_driver_name = "ctr-serpent-avx",
	528	.cra_priority = 500,
	529	.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER \| CRYPTO_ALG_ASYNC,
	530	.cra_blocksize = 1,
ffaf9156	531	.cra_ctxsize = sizeof(struct async_helper_ctx),
7efe4076 JG	532	.cra_alignmask = 0,
	533	.cra_type = &crypto_ablkcipher_type,
	534	.cra_module = THIS_MODULE,
7efe4076 JG	535	.cra_init = ablk_init,
	536	.cra_exit = ablk_exit,
	537	.cra_u = {
	538	.ablkcipher = {
	539	.min_keysize = SERPENT_MIN_KEY_SIZE,
	540	.max_keysize = SERPENT_MAX_KEY_SIZE,
	541	.ivsize = SERPENT_BLOCK_SIZE,
	542	.setkey = ablk_set_key,
	543	.encrypt = ablk_encrypt,
	544	.decrypt = ablk_encrypt,
	545	.geniv = "chainiv",
	546	},
	547	},
	548	}, {
	549	.cra_name = "lrw(serpent)",
	550	.cra_driver_name = "lrw-serpent-avx",
	551	.cra_priority = 500,
	552	.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER \| CRYPTO_ALG_ASYNC,
	553	.cra_blocksize = SERPENT_BLOCK_SIZE,
ffaf9156	554	.cra_ctxsize = sizeof(struct async_helper_ctx),
7efe4076 JG	555	.cra_alignmask = 0,
	556	.cra_type = &crypto_ablkcipher_type,
	557	.cra_module = THIS_MODULE,
7efe4076 JG	558	.cra_init = ablk_init,
	559	.cra_exit = ablk_exit,
	560	.cra_u = {
	561	.ablkcipher = {
	562	.min_keysize = SERPENT_MIN_KEY_SIZE +
	563	SERPENT_BLOCK_SIZE,
	564	.max_keysize = SERPENT_MAX_KEY_SIZE +
	565	SERPENT_BLOCK_SIZE,
	566	.ivsize = SERPENT_BLOCK_SIZE,
	567	.setkey = ablk_set_key,
	568	.encrypt = ablk_encrypt,
	569	.decrypt = ablk_decrypt,
	570	},
	571	},
	572	}, {
	573	.cra_name = "xts(serpent)",
	574	.cra_driver_name = "xts-serpent-avx",
	575	.cra_priority = 500,
	576	.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER \| CRYPTO_ALG_ASYNC,
	577	.cra_blocksize = SERPENT_BLOCK_SIZE,
ffaf9156	578	.cra_ctxsize = sizeof(struct async_helper_ctx),
7efe4076 JG	579	.cra_alignmask = 0,
	580	.cra_type = &crypto_ablkcipher_type,
	581	.cra_module = THIS_MODULE,
7efe4076 JG	582	.cra_init = ablk_init,
	583	.cra_exit = ablk_exit,
	584	.cra_u = {
	585	.ablkcipher = {
	586	.min_keysize = SERPENT_MIN_KEY_SIZE * 2,
	587	.max_keysize = SERPENT_MAX_KEY_SIZE * 2,
	588	.ivsize = SERPENT_BLOCK_SIZE,
	589	.setkey = ablk_set_key,
	590	.encrypt = ablk_encrypt,
	591	.decrypt = ablk_decrypt,
	592	},
	593	},
	594	} };
	595
	596	static int __init serpent_init(void)
	597	{
c1c23f7e	598	const char *feature_name;
7efe4076	599
d91cab78 DH	600	if (!cpu_has_xfeatures(XFEATURE_MASK_SSE \| XFEATURE_MASK_YMM,
d91cab78 DH	601	&feature_name)) {
c1c23f7e	602	pr_info("CPU feature '%s' is not supported.\n", feature_name);
7efe4076 JG	603	return -ENODEV;
	604	}
	605
	606	return crypto_register_algs(serpent_algs, ARRAY_SIZE(serpent_algs));
	607	}
	608
	609	static void __exit serpent_exit(void)
	610	{
	611	crypto_unregister_algs(serpent_algs, ARRAY_SIZE(serpent_algs));
	612	}
	613
	614	module_init(serpent_init);
	615	module_exit(serpent_exit);
	616
	617	MODULE_DESCRIPTION("Serpent Cipher Algorithm, AVX optimized");
	618	MODULE_LICENSE("GPL");
5d26a105	619	MODULE_ALIAS_CRYPTO("serpent");