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linux/arch/arm64/crypto/aes-glue.c
Ard Biesheuvel 4860620da7 crypto: arm64/aes - add NEON/Crypto Extensions CBCMAC/CMAC/XCBC driver 
On ARMv8 implementations that do not support the Crypto Extensions,
such as the Raspberry Pi 3, the CCM driver falls back to the generic
table based AES implementation to perform the MAC part of the
algorithm, which is slow and not time invariant. So add a CBCMAC
implementation to the shared glue code between NEON AES and Crypto
Extensions AES, so that it can be used instead now that the CCM
driver has been updated to look for CBCMAC implementations other
than the one it supplies itself.

Also, given how these algorithms mostly only differ in the way the key
handling and the final encryption are implemented, expose CMAC and XCBC
algorithms as well based on the same core update code.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2017-02-11 17:50:45 +08:00

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/*
* linux/arch/arm64/crypto/aes-glue.c - wrapper code for ARMv8 AES
*
* Copyright (C) 2013 - 2017 Linaro Ltd <ard.biesheuvel@linaro.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <asm/neon.h>
#include <asm/hwcap.h>
#include <crypto/aes.h>
#include <crypto/internal/hash.h>
#include <crypto/internal/simd.h>
#include <crypto/internal/skcipher.h>
#include <linux/module.h>
#include <linux/cpufeature.h>
#include <crypto/xts.h>
#include "aes-ce-setkey.h"
#ifdef USE_V8_CRYPTO_EXTENSIONS
#define MODE "ce"
#define PRIO 300
#define aes_setkey ce_aes_setkey
#define aes_expandkey ce_aes_expandkey
#define aes_ecb_encrypt ce_aes_ecb_encrypt
#define aes_ecb_decrypt ce_aes_ecb_decrypt
#define aes_cbc_encrypt ce_aes_cbc_encrypt
#define aes_cbc_decrypt ce_aes_cbc_decrypt
#define aes_ctr_encrypt ce_aes_ctr_encrypt
#define aes_xts_encrypt ce_aes_xts_encrypt
#define aes_xts_decrypt ce_aes_xts_decrypt
#define aes_mac_update ce_aes_mac_update
MODULE_DESCRIPTION("AES-ECB/CBC/CTR/XTS using ARMv8 Crypto Extensions");
#else
#define MODE "neon"
#define PRIO 200
#define aes_setkey crypto_aes_set_key
#define aes_expandkey crypto_aes_expand_key
#define aes_ecb_encrypt neon_aes_ecb_encrypt
#define aes_ecb_decrypt neon_aes_ecb_decrypt
#define aes_cbc_encrypt neon_aes_cbc_encrypt
#define aes_cbc_decrypt neon_aes_cbc_decrypt
#define aes_ctr_encrypt neon_aes_ctr_encrypt
#define aes_xts_encrypt neon_aes_xts_encrypt
#define aes_xts_decrypt neon_aes_xts_decrypt
#define aes_mac_update neon_aes_mac_update
MODULE_DESCRIPTION("AES-ECB/CBC/CTR/XTS using ARMv8 NEON");
MODULE_ALIAS_CRYPTO("ecb(aes)");
MODULE_ALIAS_CRYPTO("cbc(aes)");
MODULE_ALIAS_CRYPTO("ctr(aes)");
MODULE_ALIAS_CRYPTO("xts(aes)");
MODULE_ALIAS_CRYPTO("cmac(aes)");
MODULE_ALIAS_CRYPTO("xcbc(aes)");
MODULE_ALIAS_CRYPTO("cbcmac(aes)");
#endif
MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>");
MODULE_LICENSE("GPL v2");
/* defined in aes-modes.S */
asmlinkage void aes_ecb_encrypt(u8 out[], u8 const in[], u8 const rk[],
int rounds, int blocks, int first);
asmlinkage void aes_ecb_decrypt(u8 out[], u8 const in[], u8 const rk[],
int rounds, int blocks, int first);
asmlinkage void aes_cbc_encrypt(u8 out[], u8 const in[], u8 const rk[],
int rounds, int blocks, u8 iv[], int first);
asmlinkage void aes_cbc_decrypt(u8 out[], u8 const in[], u8 const rk[],
int rounds, int blocks, u8 iv[], int first);
asmlinkage void aes_ctr_encrypt(u8 out[], u8 const in[], u8 const rk[],
int rounds, int blocks, u8 ctr[], int first);
asmlinkage void aes_xts_encrypt(u8 out[], u8 const in[], u8 const rk1[],
int rounds, int blocks, u8 const rk2[], u8 iv[],
int first);
asmlinkage void aes_xts_decrypt(u8 out[], u8 const in[], u8 const rk1[],
int rounds, int blocks, u8 const rk2[], u8 iv[],
int first);
asmlinkage void aes_mac_update(u8 const in[], u32 const rk[], int rounds,
int blocks, u8 dg[], int enc_before,
int enc_after);
struct crypto_aes_xts_ctx {
struct crypto_aes_ctx key1;
struct crypto_aes_ctx __aligned(8) key2;
};
struct mac_tfm_ctx {
struct crypto_aes_ctx key;
u8 __aligned(8) consts[];
};
struct mac_desc_ctx {
unsigned int len;
u8 dg[AES_BLOCK_SIZE];
};
static int skcipher_aes_setkey(struct crypto_skcipher *tfm, const u8 *in_key,
unsigned int key_len)
{
return aes_setkey(crypto_skcipher_tfm(tfm), in_key, key_len);
}
static int xts_set_key(struct crypto_skcipher *tfm, const u8 *in_key,
unsigned int key_len)
{
struct crypto_aes_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
int ret;
ret = xts_verify_key(tfm, in_key, key_len);
if (ret)
return ret;
ret = aes_expandkey(&ctx->key1, in_key, key_len / 2);
if (!ret)
ret = aes_expandkey(&ctx->key2, &in_key[key_len / 2],
key_len / 2);
if (!ret)
return 0;
crypto_skcipher_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
return -EINVAL;
}
static int ecb_encrypt(struct skcipher_request *req)
{
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
struct crypto_aes_ctx *ctx = crypto_skcipher_ctx(tfm);
int err, first, rounds = 6 + ctx->key_length / 4;
struct skcipher_walk walk;
unsigned int blocks;
err = skcipher_walk_virt(&walk, req, true);
kernel_neon_begin();
for (first = 1; (blocks = (walk.nbytes / AES_BLOCK_SIZE)); first = 0) {
aes_ecb_encrypt(walk.dst.virt.addr, walk.src.virt.addr,
(u8 *)ctx->key_enc, rounds, blocks, first);
err = skcipher_walk_done(&walk, walk.nbytes % AES_BLOCK_SIZE);
}
kernel_neon_end();
return err;
}
static int ecb_decrypt(struct skcipher_request *req)
{
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
struct crypto_aes_ctx *ctx = crypto_skcipher_ctx(tfm);
int err, first, rounds = 6 + ctx->key_length / 4;
struct skcipher_walk walk;
unsigned int blocks;
err = skcipher_walk_virt(&walk, req, true);
kernel_neon_begin();
for (first = 1; (blocks = (walk.nbytes / AES_BLOCK_SIZE)); first = 0) {
aes_ecb_decrypt(walk.dst.virt.addr, walk.src.virt.addr,
(u8 *)ctx->key_dec, rounds, blocks, first);
err = skcipher_walk_done(&walk, walk.nbytes % AES_BLOCK_SIZE);
}
kernel_neon_end();
return err;
}
static int cbc_encrypt(struct skcipher_request *req)
{
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
struct crypto_aes_ctx *ctx = crypto_skcipher_ctx(tfm);
int err, first, rounds = 6 + ctx->key_length / 4;
struct skcipher_walk walk;
unsigned int blocks;
err = skcipher_walk_virt(&walk, req, true);
kernel_neon_begin();
for (first = 1; (blocks = (walk.nbytes / AES_BLOCK_SIZE)); first = 0) {
aes_cbc_encrypt(walk.dst.virt.addr, walk.src.virt.addr,
(u8 *)ctx->key_enc, rounds, blocks, walk.iv,
first);
err = skcipher_walk_done(&walk, walk.nbytes % AES_BLOCK_SIZE);
}
kernel_neon_end();
return err;
}
static int cbc_decrypt(struct skcipher_request *req)
{
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
struct crypto_aes_ctx *ctx = crypto_skcipher_ctx(tfm);
int err, first, rounds = 6 + ctx->key_length / 4;
struct skcipher_walk walk;
unsigned int blocks;
err = skcipher_walk_virt(&walk, req, true);
kernel_neon_begin();
for (first = 1; (blocks = (walk.nbytes / AES_BLOCK_SIZE)); first = 0) {
aes_cbc_decrypt(walk.dst.virt.addr, walk.src.virt.addr,
(u8 *)ctx->key_dec, rounds, blocks, walk.iv,
first);
err = skcipher_walk_done(&walk, walk.nbytes % AES_BLOCK_SIZE);
}
kernel_neon_end();
return err;
}
static int ctr_encrypt(struct skcipher_request *req)
{
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
struct crypto_aes_ctx *ctx = crypto_skcipher_ctx(tfm);
int err, first, rounds = 6 + ctx->key_length / 4;
struct skcipher_walk walk;
int blocks;
err = skcipher_walk_virt(&walk, req, true);
first = 1;
kernel_neon_begin();
while ((blocks = (walk.nbytes / AES_BLOCK_SIZE))) {
aes_ctr_encrypt(walk.dst.virt.addr, walk.src.virt.addr,
(u8 *)ctx->key_enc, rounds, blocks, walk.iv,
first);
err = skcipher_walk_done(&walk, walk.nbytes % AES_BLOCK_SIZE);
first = 0;
}
if (walk.nbytes) {
u8 __aligned(8) tail[AES_BLOCK_SIZE];
unsigned int nbytes = walk.nbytes;
u8 *tdst = walk.dst.virt.addr;
u8 *tsrc = walk.src.virt.addr;
/*
* Tell aes_ctr_encrypt() to process a tail block.
*/
blocks = -1;
aes_ctr_encrypt(tail, NULL, (u8 *)ctx->key_enc, rounds,
blocks, walk.iv, first);
if (tdst != tsrc)
memcpy(tdst, tsrc, nbytes);
crypto_xor(tdst, tail, nbytes);
err = skcipher_walk_done(&walk, 0);
}
kernel_neon_end();
return err;
}
static int xts_encrypt(struct skcipher_request *req)
{
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
struct crypto_aes_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
int err, first, rounds = 6 + ctx->key1.key_length / 4;
struct skcipher_walk walk;
unsigned int blocks;
err = skcipher_walk_virt(&walk, req, true);
kernel_neon_begin();
for (first = 1; (blocks = (walk.nbytes / AES_BLOCK_SIZE)); first = 0) {
aes_xts_encrypt(walk.dst.virt.addr, walk.src.virt.addr,
(u8 *)ctx->key1.key_enc, rounds, blocks,
(u8 *)ctx->key2.key_enc, walk.iv, first);
err = skcipher_walk_done(&walk, walk.nbytes % AES_BLOCK_SIZE);
}
kernel_neon_end();
return err;
}
static int xts_decrypt(struct skcipher_request *req)
{
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
struct crypto_aes_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
int err, first, rounds = 6 + ctx->key1.key_length / 4;
struct skcipher_walk walk;
unsigned int blocks;
err = skcipher_walk_virt(&walk, req, true);
kernel_neon_begin();
for (first = 1; (blocks = (walk.nbytes / AES_BLOCK_SIZE)); first = 0) {
aes_xts_decrypt(walk.dst.virt.addr, walk.src.virt.addr,
(u8 *)ctx->key1.key_dec, rounds, blocks,
(u8 *)ctx->key2.key_enc, walk.iv, first);
err = skcipher_walk_done(&walk, walk.nbytes % AES_BLOCK_SIZE);
}
kernel_neon_end();
return err;
}
static struct skcipher_alg aes_algs[] = { {
.base = {
.cra_name = "__ecb(aes)",
.cra_driver_name = "__ecb-aes-" MODE,
.cra_priority = PRIO,
.cra_flags = CRYPTO_ALG_INTERNAL,
.cra_blocksize = AES_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct crypto_aes_ctx),
.cra_module = THIS_MODULE,
},
.min_keysize = AES_MIN_KEY_SIZE,
.max_keysize = AES_MAX_KEY_SIZE,
.setkey = skcipher_aes_setkey,
.encrypt = ecb_encrypt,
.decrypt = ecb_decrypt,
}, {
.base = {
.cra_name = "__cbc(aes)",
.cra_driver_name = "__cbc-aes-" MODE,
.cra_priority = PRIO,
.cra_flags = CRYPTO_ALG_INTERNAL,
.cra_blocksize = AES_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct crypto_aes_ctx),
.cra_module = THIS_MODULE,
},
.min_keysize = AES_MIN_KEY_SIZE,
.max_keysize = AES_MAX_KEY_SIZE,
.ivsize = AES_BLOCK_SIZE,
.setkey = skcipher_aes_setkey,
.encrypt = cbc_encrypt,
.decrypt = cbc_decrypt,
}, {
.base = {
.cra_name = "__ctr(aes)",
.cra_driver_name = "__ctr-aes-" MODE,
.cra_priority = PRIO,
.cra_flags = CRYPTO_ALG_INTERNAL,
.cra_blocksize = 1,
.cra_ctxsize = sizeof(struct crypto_aes_ctx),
.cra_module = THIS_MODULE,
},
.min_keysize = AES_MIN_KEY_SIZE,
.max_keysize = AES_MAX_KEY_SIZE,
.ivsize = AES_BLOCK_SIZE,
.chunksize = AES_BLOCK_SIZE,
.setkey = skcipher_aes_setkey,
.encrypt = ctr_encrypt,
.decrypt = ctr_encrypt,
}, {
.base = {
.cra_name = "ctr(aes)",
.cra_driver_name = "ctr-aes-" MODE,
.cra_priority = PRIO - 1,
.cra_blocksize = 1,
.cra_ctxsize = sizeof(struct crypto_aes_ctx),
.cra_module = THIS_MODULE,
},
.min_keysize = AES_MIN_KEY_SIZE,
.max_keysize = AES_MAX_KEY_SIZE,
.ivsize = AES_BLOCK_SIZE,
.chunksize = AES_BLOCK_SIZE,
.setkey = skcipher_aes_setkey,
.encrypt = ctr_encrypt,
.decrypt = ctr_encrypt,
}, {
.base = {
.cra_name = "__xts(aes)",
.cra_driver_name = "__xts-aes-" MODE,
.cra_priority = PRIO,
.cra_flags = CRYPTO_ALG_INTERNAL,
.cra_blocksize = AES_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct crypto_aes_xts_ctx),
.cra_module = THIS_MODULE,
},
.min_keysize = 2 * AES_MIN_KEY_SIZE,
.max_keysize = 2 * AES_MAX_KEY_SIZE,
.ivsize = AES_BLOCK_SIZE,
.setkey = xts_set_key,
.encrypt = xts_encrypt,
.decrypt = xts_decrypt,
} };
static int cbcmac_setkey(struct crypto_shash *tfm, const u8 *in_key,
unsigned int key_len)
{
struct mac_tfm_ctx *ctx = crypto_shash_ctx(tfm);
int err;
err = aes_expandkey(&ctx->key, in_key, key_len);
if (err)
crypto_shash_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
return err;
}
static void cmac_gf128_mul_by_x(be128 *y, const be128 *x)
{
u64 a = be64_to_cpu(x->a);
u64 b = be64_to_cpu(x->b);
y->a = cpu_to_be64((a << 1) | (b >> 63));
y->b = cpu_to_be64((b << 1) ^ ((a >> 63) ? 0x87 : 0));
}
static int cmac_setkey(struct crypto_shash *tfm, const u8 *in_key,
unsigned int key_len)
{
struct mac_tfm_ctx *ctx = crypto_shash_ctx(tfm);
be128 *consts = (be128 *)ctx->consts;
u8 *rk = (u8 *)ctx->key.key_enc;
int rounds = 6 + key_len / 4;
int err;
err = cbcmac_setkey(tfm, in_key, key_len);
if (err)
return err;
/* encrypt the zero vector */
kernel_neon_begin();
aes_ecb_encrypt(ctx->consts, (u8[AES_BLOCK_SIZE]){}, rk, rounds, 1, 1);
kernel_neon_end();
cmac_gf128_mul_by_x(consts, consts);
cmac_gf128_mul_by_x(consts + 1, consts);
return 0;
}
static int xcbc_setkey(struct crypto_shash *tfm, const u8 *in_key,
unsigned int key_len)
{
static u8 const ks[3][AES_BLOCK_SIZE] = {
{ [0 ... AES_BLOCK_SIZE - 1] = 0x1 },
{ [0 ... AES_BLOCK_SIZE - 1] = 0x2 },
{ [0 ... AES_BLOCK_SIZE - 1] = 0x3 },
};
struct mac_tfm_ctx *ctx = crypto_shash_ctx(tfm);
u8 *rk = (u8 *)ctx->key.key_enc;
int rounds = 6 + key_len / 4;
u8 key[AES_BLOCK_SIZE];
int err;
err = cbcmac_setkey(tfm, in_key, key_len);
if (err)
return err;
kernel_neon_begin();
aes_ecb_encrypt(key, ks[0], rk, rounds, 1, 1);
aes_ecb_encrypt(ctx->consts, ks[1], rk, rounds, 2, 0);
kernel_neon_end();
return cbcmac_setkey(tfm, key, sizeof(key));
}
static int mac_init(struct shash_desc *desc)
{
struct mac_desc_ctx *ctx = shash_desc_ctx(desc);
memset(ctx->dg, 0, AES_BLOCK_SIZE);
ctx->len = 0;
return 0;
}
static int mac_update(struct shash_desc *desc, const u8 *p, unsigned int len)
{
struct mac_tfm_ctx *tctx = crypto_shash_ctx(desc->tfm);
struct mac_desc_ctx *ctx = shash_desc_ctx(desc);
int rounds = 6 + tctx->key.key_length / 4;
while (len > 0) {
unsigned int l;
if ((ctx->len % AES_BLOCK_SIZE) == 0 &&
(ctx->len + len) > AES_BLOCK_SIZE) {
int blocks = len / AES_BLOCK_SIZE;
len %= AES_BLOCK_SIZE;
kernel_neon_begin();
aes_mac_update(p, tctx->key.key_enc, rounds, blocks,
ctx->dg, (ctx->len != 0), (len != 0));
kernel_neon_end();
p += blocks * AES_BLOCK_SIZE;
if (!len) {
ctx->len = AES_BLOCK_SIZE;
break;
}
ctx->len = 0;
}
l = min(len, AES_BLOCK_SIZE - ctx->len);
if (l <= AES_BLOCK_SIZE) {
crypto_xor(ctx->dg + ctx->len, p, l);
ctx->len += l;
len -= l;
p += l;
}
}
return 0;
}
static int cbcmac_final(struct shash_desc *desc, u8 *out)
{
struct mac_tfm_ctx *tctx = crypto_shash_ctx(desc->tfm);
struct mac_desc_ctx *ctx = shash_desc_ctx(desc);
int rounds = 6 + tctx->key.key_length / 4;
kernel_neon_begin();
aes_mac_update(NULL, tctx->key.key_enc, rounds, 0, ctx->dg, 1, 0);
kernel_neon_end();
memcpy(out, ctx->dg, AES_BLOCK_SIZE);
return 0;
}
static int cmac_final(struct shash_desc *desc, u8 *out)
{
struct mac_tfm_ctx *tctx = crypto_shash_ctx(desc->tfm);
struct mac_desc_ctx *ctx = shash_desc_ctx(desc);
int rounds = 6 + tctx->key.key_length / 4;
u8 *consts = tctx->consts;
if (ctx->len != AES_BLOCK_SIZE) {
ctx->dg[ctx->len] ^= 0x80;
consts += AES_BLOCK_SIZE;
}
kernel_neon_begin();
aes_mac_update(consts, tctx->key.key_enc, rounds, 1, ctx->dg, 0, 1);
kernel_neon_end();
memcpy(out, ctx->dg, AES_BLOCK_SIZE);
return 0;
}
static struct shash_alg mac_algs[] = { {
.base.cra_name = "cmac(aes)",
.base.cra_driver_name = "cmac-aes-" MODE,
.base.cra_priority = PRIO,
.base.cra_flags = CRYPTO_ALG_TYPE_SHASH,
.base.cra_blocksize = AES_BLOCK_SIZE,
.base.cra_ctxsize = sizeof(struct mac_tfm_ctx) +
2 * AES_BLOCK_SIZE,
.base.cra_module = THIS_MODULE,
.digestsize = AES_BLOCK_SIZE,
.init = mac_init,
.update = mac_update,
.final = cmac_final,
.setkey = cmac_setkey,
.descsize = sizeof(struct mac_desc_ctx),
}, {
.base.cra_name = "xcbc(aes)",
.base.cra_driver_name = "xcbc-aes-" MODE,
.base.cra_priority = PRIO,
.base.cra_flags = CRYPTO_ALG_TYPE_SHASH,
.base.cra_blocksize = AES_BLOCK_SIZE,
.base.cra_ctxsize = sizeof(struct mac_tfm_ctx) +
2 * AES_BLOCK_SIZE,
.base.cra_module = THIS_MODULE,
.digestsize = AES_BLOCK_SIZE,
.init = mac_init,
.update = mac_update,
.final = cmac_final,
.setkey = xcbc_setkey,
.descsize = sizeof(struct mac_desc_ctx),
}, {
.base.cra_name = "cbcmac(aes)",
.base.cra_driver_name = "cbcmac-aes-" MODE,
.base.cra_priority = PRIO,
.base.cra_flags = CRYPTO_ALG_TYPE_SHASH,
.base.cra_blocksize = 1,
.base.cra_ctxsize = sizeof(struct mac_tfm_ctx),
.base.cra_module = THIS_MODULE,
.digestsize = AES_BLOCK_SIZE,
.init = mac_init,
.update = mac_update,
.final = cbcmac_final,
.setkey = cbcmac_setkey,
.descsize = sizeof(struct mac_desc_ctx),
} };
static struct simd_skcipher_alg *aes_simd_algs[ARRAY_SIZE(aes_algs)];
static void aes_exit(void)
{
int i;
for (i = 0; i < ARRAY_SIZE(aes_simd_algs); i++)
if (aes_simd_algs[i])
simd_skcipher_free(aes_simd_algs[i]);
crypto_unregister_shashes(mac_algs, ARRAY_SIZE(mac_algs));
crypto_unregister_skciphers(aes_algs, ARRAY_SIZE(aes_algs));
}
static int __init aes_init(void)
{
struct simd_skcipher_alg *simd;
const char *basename;
const char *algname;
const char *drvname;
int err;
int i;
err = crypto_register_skciphers(aes_algs, ARRAY_SIZE(aes_algs));
if (err)
return err;
err = crypto_register_shashes(mac_algs, ARRAY_SIZE(mac_algs));
if (err)
goto unregister_ciphers;
for (i = 0; i < ARRAY_SIZE(aes_algs); i++) {
if (!(aes_algs[i].base.cra_flags & CRYPTO_ALG_INTERNAL))
continue;
algname = aes_algs[i].base.cra_name + 2;
drvname = aes_algs[i].base.cra_driver_name + 2;
basename = aes_algs[i].base.cra_driver_name;
simd = simd_skcipher_create_compat(algname, drvname, basename);
err = PTR_ERR(simd);
if (IS_ERR(simd))
goto unregister_simds;
aes_simd_algs[i] = simd;
}
return 0;
unregister_simds:
aes_exit();
unregister_ciphers:
crypto_unregister_skciphers(aes_algs, ARRAY_SIZE(aes_algs));
return err;
}
#ifdef USE_V8_CRYPTO_EXTENSIONS
module_cpu_feature_match(AES, aes_init);
#else
module_init(aes_init);
EXPORT_SYMBOL(neon_aes_ecb_encrypt);
EXPORT_SYMBOL(neon_aes_cbc_encrypt);
#endif
module_exit(aes_exit);
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