linux/arch/x86/crypto/aesni-intel_glue.c
Huang Ying 12387a46bb crypto: aesni-intel - Add AES-NI accelerated CTR mode
To take advantage of the hardware pipeline implementation of AES-NI
instructions. CTR mode cryption is implemented in ASM to schedule
multiple AES-NI instructions one after another. This way, some latency
of AES-NI instruction can be eliminated.

Performance testing based on dm-crypt should 50% reduction of
ecryption/decryption time.

Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2010-03-10 18:28:55 +08:00

840 lines
22 KiB
C

/*
* Support for Intel AES-NI instructions. This file contains glue
* code, the real AES implementation is in intel-aes_asm.S.
*
* Copyright (C) 2008, Intel Corp.
* Author: Huang Ying <ying.huang@intel.com>
*
* 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 <linux/hardirq.h>
#include <linux/types.h>
#include <linux/crypto.h>
#include <linux/err.h>
#include <crypto/algapi.h>
#include <crypto/aes.h>
#include <crypto/cryptd.h>
#include <crypto/ctr.h>
#include <asm/i387.h>
#include <asm/aes.h>
#if defined(CONFIG_CRYPTO_CTR) || defined(CONFIG_CRYPTO_CTR_MODULE)
#define HAS_CTR
#endif
#if defined(CONFIG_CRYPTO_LRW) || defined(CONFIG_CRYPTO_LRW_MODULE)
#define HAS_LRW
#endif
#if defined(CONFIG_CRYPTO_PCBC) || defined(CONFIG_CRYPTO_PCBC_MODULE)
#define HAS_PCBC
#endif
#if defined(CONFIG_CRYPTO_XTS) || defined(CONFIG_CRYPTO_XTS_MODULE)
#define HAS_XTS
#endif
struct async_aes_ctx {
struct cryptd_ablkcipher *cryptd_tfm;
};
#define AESNI_ALIGN 16
#define AES_BLOCK_MASK (~(AES_BLOCK_SIZE-1))
asmlinkage int aesni_set_key(struct crypto_aes_ctx *ctx, const u8 *in_key,
unsigned int key_len);
asmlinkage void aesni_enc(struct crypto_aes_ctx *ctx, u8 *out,
const u8 *in);
asmlinkage void aesni_dec(struct crypto_aes_ctx *ctx, u8 *out,
const u8 *in);
asmlinkage void aesni_ecb_enc(struct crypto_aes_ctx *ctx, u8 *out,
const u8 *in, unsigned int len);
asmlinkage void aesni_ecb_dec(struct crypto_aes_ctx *ctx, u8 *out,
const u8 *in, unsigned int len);
asmlinkage void aesni_cbc_enc(struct crypto_aes_ctx *ctx, u8 *out,
const u8 *in, unsigned int len, u8 *iv);
asmlinkage void aesni_cbc_dec(struct crypto_aes_ctx *ctx, u8 *out,
const u8 *in, unsigned int len, u8 *iv);
asmlinkage void aesni_ctr_enc(struct crypto_aes_ctx *ctx, u8 *out,
const u8 *in, unsigned int len, u8 *iv);
static inline struct crypto_aes_ctx *aes_ctx(void *raw_ctx)
{
unsigned long addr = (unsigned long)raw_ctx;
unsigned long align = AESNI_ALIGN;
if (align <= crypto_tfm_ctx_alignment())
align = 1;
return (struct crypto_aes_ctx *)ALIGN(addr, align);
}
static int aes_set_key_common(struct crypto_tfm *tfm, void *raw_ctx,
const u8 *in_key, unsigned int key_len)
{
struct crypto_aes_ctx *ctx = aes_ctx(raw_ctx);
u32 *flags = &tfm->crt_flags;
int err;
if (key_len != AES_KEYSIZE_128 && key_len != AES_KEYSIZE_192 &&
key_len != AES_KEYSIZE_256) {
*flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
return -EINVAL;
}
if (!irq_fpu_usable())
err = crypto_aes_expand_key(ctx, in_key, key_len);
else {
kernel_fpu_begin();
err = aesni_set_key(ctx, in_key, key_len);
kernel_fpu_end();
}
return err;
}
static int aes_set_key(struct crypto_tfm *tfm, const u8 *in_key,
unsigned int key_len)
{
return aes_set_key_common(tfm, crypto_tfm_ctx(tfm), in_key, key_len);
}
static void aes_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
{
struct crypto_aes_ctx *ctx = aes_ctx(crypto_tfm_ctx(tfm));
if (!irq_fpu_usable())
crypto_aes_encrypt_x86(ctx, dst, src);
else {
kernel_fpu_begin();
aesni_enc(ctx, dst, src);
kernel_fpu_end();
}
}
static void aes_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
{
struct crypto_aes_ctx *ctx = aes_ctx(crypto_tfm_ctx(tfm));
if (!irq_fpu_usable())
crypto_aes_decrypt_x86(ctx, dst, src);
else {
kernel_fpu_begin();
aesni_dec(ctx, dst, src);
kernel_fpu_end();
}
}
static struct crypto_alg aesni_alg = {
.cra_name = "aes",
.cra_driver_name = "aes-aesni",
.cra_priority = 300,
.cra_flags = CRYPTO_ALG_TYPE_CIPHER,
.cra_blocksize = AES_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct crypto_aes_ctx)+AESNI_ALIGN-1,
.cra_alignmask = 0,
.cra_module = THIS_MODULE,
.cra_list = LIST_HEAD_INIT(aesni_alg.cra_list),
.cra_u = {
.cipher = {
.cia_min_keysize = AES_MIN_KEY_SIZE,
.cia_max_keysize = AES_MAX_KEY_SIZE,
.cia_setkey = aes_set_key,
.cia_encrypt = aes_encrypt,
.cia_decrypt = aes_decrypt
}
}
};
static void __aes_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
{
struct crypto_aes_ctx *ctx = aes_ctx(crypto_tfm_ctx(tfm));
aesni_enc(ctx, dst, src);
}
static void __aes_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
{
struct crypto_aes_ctx *ctx = aes_ctx(crypto_tfm_ctx(tfm));
aesni_dec(ctx, dst, src);
}
static struct crypto_alg __aesni_alg = {
.cra_name = "__aes-aesni",
.cra_driver_name = "__driver-aes-aesni",
.cra_priority = 0,
.cra_flags = CRYPTO_ALG_TYPE_CIPHER,
.cra_blocksize = AES_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct crypto_aes_ctx)+AESNI_ALIGN-1,
.cra_alignmask = 0,
.cra_module = THIS_MODULE,
.cra_list = LIST_HEAD_INIT(__aesni_alg.cra_list),
.cra_u = {
.cipher = {
.cia_min_keysize = AES_MIN_KEY_SIZE,
.cia_max_keysize = AES_MAX_KEY_SIZE,
.cia_setkey = aes_set_key,
.cia_encrypt = __aes_encrypt,
.cia_decrypt = __aes_decrypt
}
}
};
static int ecb_encrypt(struct blkcipher_desc *desc,
struct scatterlist *dst, struct scatterlist *src,
unsigned int nbytes)
{
struct crypto_aes_ctx *ctx = aes_ctx(crypto_blkcipher_ctx(desc->tfm));
struct blkcipher_walk walk;
int err;
blkcipher_walk_init(&walk, dst, src, nbytes);
err = blkcipher_walk_virt(desc, &walk);
desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
kernel_fpu_begin();
while ((nbytes = walk.nbytes)) {
aesni_ecb_enc(ctx, walk.dst.virt.addr, walk.src.virt.addr,
nbytes & AES_BLOCK_MASK);
nbytes &= AES_BLOCK_SIZE - 1;
err = blkcipher_walk_done(desc, &walk, nbytes);
}
kernel_fpu_end();
return err;
}
static int ecb_decrypt(struct blkcipher_desc *desc,
struct scatterlist *dst, struct scatterlist *src,
unsigned int nbytes)
{
struct crypto_aes_ctx *ctx = aes_ctx(crypto_blkcipher_ctx(desc->tfm));
struct blkcipher_walk walk;
int err;
blkcipher_walk_init(&walk, dst, src, nbytes);
err = blkcipher_walk_virt(desc, &walk);
desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
kernel_fpu_begin();
while ((nbytes = walk.nbytes)) {
aesni_ecb_dec(ctx, walk.dst.virt.addr, walk.src.virt.addr,
nbytes & AES_BLOCK_MASK);
nbytes &= AES_BLOCK_SIZE - 1;
err = blkcipher_walk_done(desc, &walk, nbytes);
}
kernel_fpu_end();
return err;
}
static struct crypto_alg blk_ecb_alg = {
.cra_name = "__ecb-aes-aesni",
.cra_driver_name = "__driver-ecb-aes-aesni",
.cra_priority = 0,
.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
.cra_blocksize = AES_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct crypto_aes_ctx)+AESNI_ALIGN-1,
.cra_alignmask = 0,
.cra_type = &crypto_blkcipher_type,
.cra_module = THIS_MODULE,
.cra_list = LIST_HEAD_INIT(blk_ecb_alg.cra_list),
.cra_u = {
.blkcipher = {
.min_keysize = AES_MIN_KEY_SIZE,
.max_keysize = AES_MAX_KEY_SIZE,
.setkey = aes_set_key,
.encrypt = ecb_encrypt,
.decrypt = ecb_decrypt,
},
},
};
static int cbc_encrypt(struct blkcipher_desc *desc,
struct scatterlist *dst, struct scatterlist *src,
unsigned int nbytes)
{
struct crypto_aes_ctx *ctx = aes_ctx(crypto_blkcipher_ctx(desc->tfm));
struct blkcipher_walk walk;
int err;
blkcipher_walk_init(&walk, dst, src, nbytes);
err = blkcipher_walk_virt(desc, &walk);
desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
kernel_fpu_begin();
while ((nbytes = walk.nbytes)) {
aesni_cbc_enc(ctx, walk.dst.virt.addr, walk.src.virt.addr,
nbytes & AES_BLOCK_MASK, walk.iv);
nbytes &= AES_BLOCK_SIZE - 1;
err = blkcipher_walk_done(desc, &walk, nbytes);
}
kernel_fpu_end();
return err;
}
static int cbc_decrypt(struct blkcipher_desc *desc,
struct scatterlist *dst, struct scatterlist *src,
unsigned int nbytes)
{
struct crypto_aes_ctx *ctx = aes_ctx(crypto_blkcipher_ctx(desc->tfm));
struct blkcipher_walk walk;
int err;
blkcipher_walk_init(&walk, dst, src, nbytes);
err = blkcipher_walk_virt(desc, &walk);
desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
kernel_fpu_begin();
while ((nbytes = walk.nbytes)) {
aesni_cbc_dec(ctx, walk.dst.virt.addr, walk.src.virt.addr,
nbytes & AES_BLOCK_MASK, walk.iv);
nbytes &= AES_BLOCK_SIZE - 1;
err = blkcipher_walk_done(desc, &walk, nbytes);
}
kernel_fpu_end();
return err;
}
static struct crypto_alg blk_cbc_alg = {
.cra_name = "__cbc-aes-aesni",
.cra_driver_name = "__driver-cbc-aes-aesni",
.cra_priority = 0,
.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
.cra_blocksize = AES_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct crypto_aes_ctx)+AESNI_ALIGN-1,
.cra_alignmask = 0,
.cra_type = &crypto_blkcipher_type,
.cra_module = THIS_MODULE,
.cra_list = LIST_HEAD_INIT(blk_cbc_alg.cra_list),
.cra_u = {
.blkcipher = {
.min_keysize = AES_MIN_KEY_SIZE,
.max_keysize = AES_MAX_KEY_SIZE,
.setkey = aes_set_key,
.encrypt = cbc_encrypt,
.decrypt = cbc_decrypt,
},
},
};
static void ctr_crypt_final(struct crypto_aes_ctx *ctx,
struct blkcipher_walk *walk)
{
u8 *ctrblk = walk->iv;
u8 keystream[AES_BLOCK_SIZE];
u8 *src = walk->src.virt.addr;
u8 *dst = walk->dst.virt.addr;
unsigned int nbytes = walk->nbytes;
aesni_enc(ctx, keystream, ctrblk);
crypto_xor(keystream, src, nbytes);
memcpy(dst, keystream, nbytes);
crypto_inc(ctrblk, AES_BLOCK_SIZE);
}
static int ctr_crypt(struct blkcipher_desc *desc,
struct scatterlist *dst, struct scatterlist *src,
unsigned int nbytes)
{
struct crypto_aes_ctx *ctx = aes_ctx(crypto_blkcipher_ctx(desc->tfm));
struct blkcipher_walk walk;
int err;
blkcipher_walk_init(&walk, dst, src, nbytes);
err = blkcipher_walk_virt_block(desc, &walk, AES_BLOCK_SIZE);
desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
kernel_fpu_begin();
while ((nbytes = walk.nbytes) >= AES_BLOCK_SIZE) {
aesni_ctr_enc(ctx, walk.dst.virt.addr, walk.src.virt.addr,
nbytes & AES_BLOCK_MASK, walk.iv);
nbytes &= AES_BLOCK_SIZE - 1;
err = blkcipher_walk_done(desc, &walk, nbytes);
}
if (walk.nbytes) {
ctr_crypt_final(ctx, &walk);
err = blkcipher_walk_done(desc, &walk, 0);
}
kernel_fpu_end();
return err;
}
static struct crypto_alg blk_ctr_alg = {
.cra_name = "__ctr-aes-aesni",
.cra_driver_name = "__driver-ctr-aes-aesni",
.cra_priority = 0,
.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
.cra_blocksize = 1,
.cra_ctxsize = sizeof(struct crypto_aes_ctx)+AESNI_ALIGN-1,
.cra_alignmask = 0,
.cra_type = &crypto_blkcipher_type,
.cra_module = THIS_MODULE,
.cra_list = LIST_HEAD_INIT(blk_ctr_alg.cra_list),
.cra_u = {
.blkcipher = {
.min_keysize = AES_MIN_KEY_SIZE,
.max_keysize = AES_MAX_KEY_SIZE,
.ivsize = AES_BLOCK_SIZE,
.setkey = aes_set_key,
.encrypt = ctr_crypt,
.decrypt = ctr_crypt,
},
},
};
static int ablk_set_key(struct crypto_ablkcipher *tfm, const u8 *key,
unsigned int key_len)
{
struct async_aes_ctx *ctx = crypto_ablkcipher_ctx(tfm);
struct crypto_ablkcipher *child = &ctx->cryptd_tfm->base;
int err;
crypto_ablkcipher_clear_flags(child, CRYPTO_TFM_REQ_MASK);
crypto_ablkcipher_set_flags(child, crypto_ablkcipher_get_flags(tfm)
& CRYPTO_TFM_REQ_MASK);
err = crypto_ablkcipher_setkey(child, key, key_len);
crypto_ablkcipher_set_flags(tfm, crypto_ablkcipher_get_flags(child)
& CRYPTO_TFM_RES_MASK);
return err;
}
static int ablk_encrypt(struct ablkcipher_request *req)
{
struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
struct async_aes_ctx *ctx = crypto_ablkcipher_ctx(tfm);
if (!irq_fpu_usable()) {
struct ablkcipher_request *cryptd_req =
ablkcipher_request_ctx(req);
memcpy(cryptd_req, req, sizeof(*req));
ablkcipher_request_set_tfm(cryptd_req, &ctx->cryptd_tfm->base);
return crypto_ablkcipher_encrypt(cryptd_req);
} else {
struct blkcipher_desc desc;
desc.tfm = cryptd_ablkcipher_child(ctx->cryptd_tfm);
desc.info = req->info;
desc.flags = 0;
return crypto_blkcipher_crt(desc.tfm)->encrypt(
&desc, req->dst, req->src, req->nbytes);
}
}
static int ablk_decrypt(struct ablkcipher_request *req)
{
struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
struct async_aes_ctx *ctx = crypto_ablkcipher_ctx(tfm);
if (!irq_fpu_usable()) {
struct ablkcipher_request *cryptd_req =
ablkcipher_request_ctx(req);
memcpy(cryptd_req, req, sizeof(*req));
ablkcipher_request_set_tfm(cryptd_req, &ctx->cryptd_tfm->base);
return crypto_ablkcipher_decrypt(cryptd_req);
} else {
struct blkcipher_desc desc;
desc.tfm = cryptd_ablkcipher_child(ctx->cryptd_tfm);
desc.info = req->info;
desc.flags = 0;
return crypto_blkcipher_crt(desc.tfm)->decrypt(
&desc, req->dst, req->src, req->nbytes);
}
}
static void ablk_exit(struct crypto_tfm *tfm)
{
struct async_aes_ctx *ctx = crypto_tfm_ctx(tfm);
cryptd_free_ablkcipher(ctx->cryptd_tfm);
}
static void ablk_init_common(struct crypto_tfm *tfm,
struct cryptd_ablkcipher *cryptd_tfm)
{
struct async_aes_ctx *ctx = crypto_tfm_ctx(tfm);
ctx->cryptd_tfm = cryptd_tfm;
tfm->crt_ablkcipher.reqsize = sizeof(struct ablkcipher_request) +
crypto_ablkcipher_reqsize(&cryptd_tfm->base);
}
static int ablk_ecb_init(struct crypto_tfm *tfm)
{
struct cryptd_ablkcipher *cryptd_tfm;
cryptd_tfm = cryptd_alloc_ablkcipher("__driver-ecb-aes-aesni", 0, 0);
if (IS_ERR(cryptd_tfm))
return PTR_ERR(cryptd_tfm);
ablk_init_common(tfm, cryptd_tfm);
return 0;
}
static struct crypto_alg ablk_ecb_alg = {
.cra_name = "ecb(aes)",
.cra_driver_name = "ecb-aes-aesni",
.cra_priority = 400,
.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER|CRYPTO_ALG_ASYNC,
.cra_blocksize = AES_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct async_aes_ctx),
.cra_alignmask = 0,
.cra_type = &crypto_ablkcipher_type,
.cra_module = THIS_MODULE,
.cra_list = LIST_HEAD_INIT(ablk_ecb_alg.cra_list),
.cra_init = ablk_ecb_init,
.cra_exit = ablk_exit,
.cra_u = {
.ablkcipher = {
.min_keysize = AES_MIN_KEY_SIZE,
.max_keysize = AES_MAX_KEY_SIZE,
.setkey = ablk_set_key,
.encrypt = ablk_encrypt,
.decrypt = ablk_decrypt,
},
},
};
static int ablk_cbc_init(struct crypto_tfm *tfm)
{
struct cryptd_ablkcipher *cryptd_tfm;
cryptd_tfm = cryptd_alloc_ablkcipher("__driver-cbc-aes-aesni", 0, 0);
if (IS_ERR(cryptd_tfm))
return PTR_ERR(cryptd_tfm);
ablk_init_common(tfm, cryptd_tfm);
return 0;
}
static struct crypto_alg ablk_cbc_alg = {
.cra_name = "cbc(aes)",
.cra_driver_name = "cbc-aes-aesni",
.cra_priority = 400,
.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER|CRYPTO_ALG_ASYNC,
.cra_blocksize = AES_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct async_aes_ctx),
.cra_alignmask = 0,
.cra_type = &crypto_ablkcipher_type,
.cra_module = THIS_MODULE,
.cra_list = LIST_HEAD_INIT(ablk_cbc_alg.cra_list),
.cra_init = ablk_cbc_init,
.cra_exit = ablk_exit,
.cra_u = {
.ablkcipher = {
.min_keysize = AES_MIN_KEY_SIZE,
.max_keysize = AES_MAX_KEY_SIZE,
.ivsize = AES_BLOCK_SIZE,
.setkey = ablk_set_key,
.encrypt = ablk_encrypt,
.decrypt = ablk_decrypt,
},
},
};
static int ablk_ctr_init(struct crypto_tfm *tfm)
{
struct cryptd_ablkcipher *cryptd_tfm;
cryptd_tfm = cryptd_alloc_ablkcipher("__driver-ctr-aes-aesni", 0, 0);
if (IS_ERR(cryptd_tfm))
return PTR_ERR(cryptd_tfm);
ablk_init_common(tfm, cryptd_tfm);
return 0;
}
static struct crypto_alg ablk_ctr_alg = {
.cra_name = "ctr(aes)",
.cra_driver_name = "ctr-aes-aesni",
.cra_priority = 400,
.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER|CRYPTO_ALG_ASYNC,
.cra_blocksize = 1,
.cra_ctxsize = sizeof(struct async_aes_ctx),
.cra_alignmask = 0,
.cra_type = &crypto_ablkcipher_type,
.cra_module = THIS_MODULE,
.cra_list = LIST_HEAD_INIT(ablk_ctr_alg.cra_list),
.cra_init = ablk_ctr_init,
.cra_exit = ablk_exit,
.cra_u = {
.ablkcipher = {
.min_keysize = AES_MIN_KEY_SIZE,
.max_keysize = AES_MAX_KEY_SIZE,
.ivsize = AES_BLOCK_SIZE,
.setkey = ablk_set_key,
.encrypt = ablk_encrypt,
.decrypt = ablk_encrypt,
.geniv = "chainiv",
},
},
};
#ifdef HAS_CTR
static int ablk_rfc3686_ctr_init(struct crypto_tfm *tfm)
{
struct cryptd_ablkcipher *cryptd_tfm;
cryptd_tfm = cryptd_alloc_ablkcipher(
"rfc3686(__driver-ctr-aes-aesni)", 0, 0);
if (IS_ERR(cryptd_tfm))
return PTR_ERR(cryptd_tfm);
ablk_init_common(tfm, cryptd_tfm);
return 0;
}
static struct crypto_alg ablk_rfc3686_ctr_alg = {
.cra_name = "rfc3686(ctr(aes))",
.cra_driver_name = "rfc3686-ctr-aes-aesni",
.cra_priority = 400,
.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER|CRYPTO_ALG_ASYNC,
.cra_blocksize = 1,
.cra_ctxsize = sizeof(struct async_aes_ctx),
.cra_alignmask = 0,
.cra_type = &crypto_ablkcipher_type,
.cra_module = THIS_MODULE,
.cra_list = LIST_HEAD_INIT(ablk_rfc3686_ctr_alg.cra_list),
.cra_init = ablk_rfc3686_ctr_init,
.cra_exit = ablk_exit,
.cra_u = {
.ablkcipher = {
.min_keysize = AES_MIN_KEY_SIZE+CTR_RFC3686_NONCE_SIZE,
.max_keysize = AES_MAX_KEY_SIZE+CTR_RFC3686_NONCE_SIZE,
.ivsize = CTR_RFC3686_IV_SIZE,
.setkey = ablk_set_key,
.encrypt = ablk_encrypt,
.decrypt = ablk_decrypt,
.geniv = "seqiv",
},
},
};
#endif
#ifdef HAS_LRW
static int ablk_lrw_init(struct crypto_tfm *tfm)
{
struct cryptd_ablkcipher *cryptd_tfm;
cryptd_tfm = cryptd_alloc_ablkcipher("fpu(lrw(__driver-aes-aesni))",
0, 0);
if (IS_ERR(cryptd_tfm))
return PTR_ERR(cryptd_tfm);
ablk_init_common(tfm, cryptd_tfm);
return 0;
}
static struct crypto_alg ablk_lrw_alg = {
.cra_name = "lrw(aes)",
.cra_driver_name = "lrw-aes-aesni",
.cra_priority = 400,
.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER|CRYPTO_ALG_ASYNC,
.cra_blocksize = AES_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct async_aes_ctx),
.cra_alignmask = 0,
.cra_type = &crypto_ablkcipher_type,
.cra_module = THIS_MODULE,
.cra_list = LIST_HEAD_INIT(ablk_lrw_alg.cra_list),
.cra_init = ablk_lrw_init,
.cra_exit = ablk_exit,
.cra_u = {
.ablkcipher = {
.min_keysize = AES_MIN_KEY_SIZE + AES_BLOCK_SIZE,
.max_keysize = AES_MAX_KEY_SIZE + AES_BLOCK_SIZE,
.ivsize = AES_BLOCK_SIZE,
.setkey = ablk_set_key,
.encrypt = ablk_encrypt,
.decrypt = ablk_decrypt,
},
},
};
#endif
#ifdef HAS_PCBC
static int ablk_pcbc_init(struct crypto_tfm *tfm)
{
struct cryptd_ablkcipher *cryptd_tfm;
cryptd_tfm = cryptd_alloc_ablkcipher("fpu(pcbc(__driver-aes-aesni))",
0, 0);
if (IS_ERR(cryptd_tfm))
return PTR_ERR(cryptd_tfm);
ablk_init_common(tfm, cryptd_tfm);
return 0;
}
static struct crypto_alg ablk_pcbc_alg = {
.cra_name = "pcbc(aes)",
.cra_driver_name = "pcbc-aes-aesni",
.cra_priority = 400,
.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER|CRYPTO_ALG_ASYNC,
.cra_blocksize = AES_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct async_aes_ctx),
.cra_alignmask = 0,
.cra_type = &crypto_ablkcipher_type,
.cra_module = THIS_MODULE,
.cra_list = LIST_HEAD_INIT(ablk_pcbc_alg.cra_list),
.cra_init = ablk_pcbc_init,
.cra_exit = ablk_exit,
.cra_u = {
.ablkcipher = {
.min_keysize = AES_MIN_KEY_SIZE,
.max_keysize = AES_MAX_KEY_SIZE,
.ivsize = AES_BLOCK_SIZE,
.setkey = ablk_set_key,
.encrypt = ablk_encrypt,
.decrypt = ablk_decrypt,
},
},
};
#endif
#ifdef HAS_XTS
static int ablk_xts_init(struct crypto_tfm *tfm)
{
struct cryptd_ablkcipher *cryptd_tfm;
cryptd_tfm = cryptd_alloc_ablkcipher("fpu(xts(__driver-aes-aesni))",
0, 0);
if (IS_ERR(cryptd_tfm))
return PTR_ERR(cryptd_tfm);
ablk_init_common(tfm, cryptd_tfm);
return 0;
}
static struct crypto_alg ablk_xts_alg = {
.cra_name = "xts(aes)",
.cra_driver_name = "xts-aes-aesni",
.cra_priority = 400,
.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER|CRYPTO_ALG_ASYNC,
.cra_blocksize = AES_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct async_aes_ctx),
.cra_alignmask = 0,
.cra_type = &crypto_ablkcipher_type,
.cra_module = THIS_MODULE,
.cra_list = LIST_HEAD_INIT(ablk_xts_alg.cra_list),
.cra_init = ablk_xts_init,
.cra_exit = ablk_exit,
.cra_u = {
.ablkcipher = {
.min_keysize = 2 * AES_MIN_KEY_SIZE,
.max_keysize = 2 * AES_MAX_KEY_SIZE,
.ivsize = AES_BLOCK_SIZE,
.setkey = ablk_set_key,
.encrypt = ablk_encrypt,
.decrypt = ablk_decrypt,
},
},
};
#endif
static int __init aesni_init(void)
{
int err;
if (!cpu_has_aes) {
printk(KERN_INFO "Intel AES-NI instructions are not detected.\n");
return -ENODEV;
}
if ((err = crypto_register_alg(&aesni_alg)))
goto aes_err;
if ((err = crypto_register_alg(&__aesni_alg)))
goto __aes_err;
if ((err = crypto_register_alg(&blk_ecb_alg)))
goto blk_ecb_err;
if ((err = crypto_register_alg(&blk_cbc_alg)))
goto blk_cbc_err;
if ((err = crypto_register_alg(&blk_ctr_alg)))
goto blk_ctr_err;
if ((err = crypto_register_alg(&ablk_ecb_alg)))
goto ablk_ecb_err;
if ((err = crypto_register_alg(&ablk_cbc_alg)))
goto ablk_cbc_err;
if ((err = crypto_register_alg(&ablk_ctr_alg)))
goto ablk_ctr_err;
#ifdef HAS_CTR
if ((err = crypto_register_alg(&ablk_rfc3686_ctr_alg)))
goto ablk_rfc3686_ctr_err;
#endif
#ifdef HAS_LRW
if ((err = crypto_register_alg(&ablk_lrw_alg)))
goto ablk_lrw_err;
#endif
#ifdef HAS_PCBC
if ((err = crypto_register_alg(&ablk_pcbc_alg)))
goto ablk_pcbc_err;
#endif
#ifdef HAS_XTS
if ((err = crypto_register_alg(&ablk_xts_alg)))
goto ablk_xts_err;
#endif
return err;
#ifdef HAS_XTS
ablk_xts_err:
#endif
#ifdef HAS_PCBC
crypto_unregister_alg(&ablk_pcbc_alg);
ablk_pcbc_err:
#endif
#ifdef HAS_LRW
crypto_unregister_alg(&ablk_lrw_alg);
ablk_lrw_err:
#endif
#ifdef HAS_CTR
crypto_unregister_alg(&ablk_rfc3686_ctr_alg);
ablk_rfc3686_ctr_err:
#endif
crypto_unregister_alg(&ablk_ctr_alg);
ablk_ctr_err:
crypto_unregister_alg(&ablk_cbc_alg);
ablk_cbc_err:
crypto_unregister_alg(&ablk_ecb_alg);
ablk_ecb_err:
crypto_unregister_alg(&blk_ctr_alg);
blk_ctr_err:
crypto_unregister_alg(&blk_cbc_alg);
blk_cbc_err:
crypto_unregister_alg(&blk_ecb_alg);
blk_ecb_err:
crypto_unregister_alg(&__aesni_alg);
__aes_err:
crypto_unregister_alg(&aesni_alg);
aes_err:
return err;
}
static void __exit aesni_exit(void)
{
#ifdef HAS_XTS
crypto_unregister_alg(&ablk_xts_alg);
#endif
#ifdef HAS_PCBC
crypto_unregister_alg(&ablk_pcbc_alg);
#endif
#ifdef HAS_LRW
crypto_unregister_alg(&ablk_lrw_alg);
#endif
#ifdef HAS_CTR
crypto_unregister_alg(&ablk_rfc3686_ctr_alg);
#endif
crypto_unregister_alg(&ablk_ctr_alg);
crypto_unregister_alg(&ablk_cbc_alg);
crypto_unregister_alg(&ablk_ecb_alg);
crypto_unregister_alg(&blk_ctr_alg);
crypto_unregister_alg(&blk_cbc_alg);
crypto_unregister_alg(&blk_ecb_alg);
crypto_unregister_alg(&__aesni_alg);
crypto_unregister_alg(&aesni_alg);
}
module_init(aesni_init);
module_exit(aesni_exit);
MODULE_DESCRIPTION("Rijndael (AES) Cipher Algorithm, Intel AES-NI instructions optimized");
MODULE_LICENSE("GPL");
MODULE_ALIAS("aes");