1212 lines
35 KiB
C
1212 lines
35 KiB
C
/*
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* Support for Intel AES-NI instructions. This file contains glue
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* code, the real AES implementation is in intel-aes_asm.S.
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*
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* Copyright (C) 2008, Intel Corp.
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* Author: Huang Ying <ying.huang@intel.com>
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*
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* Added RFC4106 AES-GCM support for 128-bit keys under the AEAD
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* interface for 64-bit kernels.
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* Authors: Adrian Hoban <adrian.hoban@intel.com>
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* Gabriele Paoloni <gabriele.paoloni@intel.com>
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* Tadeusz Struk (tadeusz.struk@intel.com)
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* Aidan O'Mahony (aidan.o.mahony@intel.com)
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* Copyright (c) 2010, Intel Corporation.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <linux/hardirq.h>
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#include <linux/types.h>
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#include <linux/module.h>
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#include <linux/err.h>
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#include <crypto/algapi.h>
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#include <crypto/aes.h>
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#include <crypto/cryptd.h>
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#include <crypto/ctr.h>
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#include <crypto/b128ops.h>
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#include <crypto/xts.h>
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#include <asm/cpu_device_id.h>
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#include <asm/fpu/api.h>
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#include <asm/crypto/aes.h>
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#include <crypto/scatterwalk.h>
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#include <crypto/internal/aead.h>
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#include <crypto/internal/simd.h>
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#include <crypto/internal/skcipher.h>
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#include <linux/workqueue.h>
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#include <linux/spinlock.h>
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#ifdef CONFIG_X86_64
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#include <asm/crypto/glue_helper.h>
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#endif
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#define AESNI_ALIGN 16
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#define AESNI_ALIGN_ATTR __attribute__ ((__aligned__(AESNI_ALIGN)))
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#define AES_BLOCK_MASK (~(AES_BLOCK_SIZE - 1))
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#define RFC4106_HASH_SUBKEY_SIZE 16
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#define AESNI_ALIGN_EXTRA ((AESNI_ALIGN - 1) & ~(CRYPTO_MINALIGN - 1))
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#define CRYPTO_AES_CTX_SIZE (sizeof(struct crypto_aes_ctx) + AESNI_ALIGN_EXTRA)
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#define XTS_AES_CTX_SIZE (sizeof(struct aesni_xts_ctx) + AESNI_ALIGN_EXTRA)
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/* This data is stored at the end of the crypto_tfm struct.
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* It's a type of per "session" data storage location.
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* This needs to be 16 byte aligned.
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*/
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struct aesni_rfc4106_gcm_ctx {
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u8 hash_subkey[16] AESNI_ALIGN_ATTR;
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struct crypto_aes_ctx aes_key_expanded AESNI_ALIGN_ATTR;
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u8 nonce[4];
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};
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struct aesni_xts_ctx {
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u8 raw_tweak_ctx[sizeof(struct crypto_aes_ctx)] AESNI_ALIGN_ATTR;
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u8 raw_crypt_ctx[sizeof(struct crypto_aes_ctx)] AESNI_ALIGN_ATTR;
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};
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asmlinkage int aesni_set_key(struct crypto_aes_ctx *ctx, const u8 *in_key,
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unsigned int key_len);
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asmlinkage void aesni_enc(struct crypto_aes_ctx *ctx, u8 *out,
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const u8 *in);
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asmlinkage void aesni_dec(struct crypto_aes_ctx *ctx, u8 *out,
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const u8 *in);
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asmlinkage void aesni_ecb_enc(struct crypto_aes_ctx *ctx, u8 *out,
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const u8 *in, unsigned int len);
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asmlinkage void aesni_ecb_dec(struct crypto_aes_ctx *ctx, u8 *out,
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const u8 *in, unsigned int len);
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asmlinkage void aesni_cbc_enc(struct crypto_aes_ctx *ctx, u8 *out,
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const u8 *in, unsigned int len, u8 *iv);
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asmlinkage void aesni_cbc_dec(struct crypto_aes_ctx *ctx, u8 *out,
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const u8 *in, unsigned int len, u8 *iv);
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int crypto_fpu_init(void);
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void crypto_fpu_exit(void);
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#define AVX_GEN2_OPTSIZE 640
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#define AVX_GEN4_OPTSIZE 4096
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#ifdef CONFIG_X86_64
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static void (*aesni_ctr_enc_tfm)(struct crypto_aes_ctx *ctx, u8 *out,
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const u8 *in, unsigned int len, u8 *iv);
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asmlinkage void aesni_ctr_enc(struct crypto_aes_ctx *ctx, u8 *out,
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const u8 *in, unsigned int len, u8 *iv);
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asmlinkage void aesni_xts_crypt8(struct crypto_aes_ctx *ctx, u8 *out,
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const u8 *in, bool enc, u8 *iv);
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/* asmlinkage void aesni_gcm_enc()
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* void *ctx, AES Key schedule. Starts on a 16 byte boundary.
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* u8 *out, Ciphertext output. Encrypt in-place is allowed.
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* const u8 *in, Plaintext input
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* unsigned long plaintext_len, Length of data in bytes for encryption.
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* u8 *iv, Pre-counter block j0: 4 byte salt (from Security Association)
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* concatenated with 8 byte Initialisation Vector (from IPSec ESP
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* Payload) concatenated with 0x00000001. 16-byte aligned pointer.
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* u8 *hash_subkey, the Hash sub key input. Data starts on a 16-byte boundary.
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* const u8 *aad, Additional Authentication Data (AAD)
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* unsigned long aad_len, Length of AAD in bytes. With RFC4106 this
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* is going to be 8 or 12 bytes
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* u8 *auth_tag, Authenticated Tag output.
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* unsigned long auth_tag_len), Authenticated Tag Length in bytes.
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* Valid values are 16 (most likely), 12 or 8.
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*/
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asmlinkage void aesni_gcm_enc(void *ctx, u8 *out,
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const u8 *in, unsigned long plaintext_len, u8 *iv,
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u8 *hash_subkey, const u8 *aad, unsigned long aad_len,
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u8 *auth_tag, unsigned long auth_tag_len);
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/* asmlinkage void aesni_gcm_dec()
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* void *ctx, AES Key schedule. Starts on a 16 byte boundary.
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* u8 *out, Plaintext output. Decrypt in-place is allowed.
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* const u8 *in, Ciphertext input
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* unsigned long ciphertext_len, Length of data in bytes for decryption.
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* u8 *iv, Pre-counter block j0: 4 byte salt (from Security Association)
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* concatenated with 8 byte Initialisation Vector (from IPSec ESP
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* Payload) concatenated with 0x00000001. 16-byte aligned pointer.
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* u8 *hash_subkey, the Hash sub key input. Data starts on a 16-byte boundary.
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* const u8 *aad, Additional Authentication Data (AAD)
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* unsigned long aad_len, Length of AAD in bytes. With RFC4106 this is going
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* to be 8 or 12 bytes
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* u8 *auth_tag, Authenticated Tag output.
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* unsigned long auth_tag_len) Authenticated Tag Length in bytes.
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* Valid values are 16 (most likely), 12 or 8.
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*/
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asmlinkage void aesni_gcm_dec(void *ctx, u8 *out,
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const u8 *in, unsigned long ciphertext_len, u8 *iv,
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u8 *hash_subkey, const u8 *aad, unsigned long aad_len,
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u8 *auth_tag, unsigned long auth_tag_len);
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#ifdef CONFIG_AS_AVX
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asmlinkage void aes_ctr_enc_128_avx_by8(const u8 *in, u8 *iv,
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void *keys, u8 *out, unsigned int num_bytes);
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asmlinkage void aes_ctr_enc_192_avx_by8(const u8 *in, u8 *iv,
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void *keys, u8 *out, unsigned int num_bytes);
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asmlinkage void aes_ctr_enc_256_avx_by8(const u8 *in, u8 *iv,
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void *keys, u8 *out, unsigned int num_bytes);
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/*
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* asmlinkage void aesni_gcm_precomp_avx_gen2()
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* gcm_data *my_ctx_data, context data
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* u8 *hash_subkey, the Hash sub key input. Data starts on a 16-byte boundary.
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*/
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asmlinkage void aesni_gcm_precomp_avx_gen2(void *my_ctx_data, u8 *hash_subkey);
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asmlinkage void aesni_gcm_enc_avx_gen2(void *ctx, u8 *out,
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const u8 *in, unsigned long plaintext_len, u8 *iv,
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const u8 *aad, unsigned long aad_len,
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u8 *auth_tag, unsigned long auth_tag_len);
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asmlinkage void aesni_gcm_dec_avx_gen2(void *ctx, u8 *out,
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const u8 *in, unsigned long ciphertext_len, u8 *iv,
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const u8 *aad, unsigned long aad_len,
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u8 *auth_tag, unsigned long auth_tag_len);
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static void aesni_gcm_enc_avx(void *ctx, u8 *out,
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const u8 *in, unsigned long plaintext_len, u8 *iv,
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u8 *hash_subkey, const u8 *aad, unsigned long aad_len,
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u8 *auth_tag, unsigned long auth_tag_len)
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{
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struct crypto_aes_ctx *aes_ctx = (struct crypto_aes_ctx*)ctx;
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if ((plaintext_len < AVX_GEN2_OPTSIZE) || (aes_ctx-> key_length != AES_KEYSIZE_128)){
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aesni_gcm_enc(ctx, out, in, plaintext_len, iv, hash_subkey, aad,
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aad_len, auth_tag, auth_tag_len);
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} else {
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aesni_gcm_precomp_avx_gen2(ctx, hash_subkey);
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aesni_gcm_enc_avx_gen2(ctx, out, in, plaintext_len, iv, aad,
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aad_len, auth_tag, auth_tag_len);
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}
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}
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static void aesni_gcm_dec_avx(void *ctx, u8 *out,
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const u8 *in, unsigned long ciphertext_len, u8 *iv,
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u8 *hash_subkey, const u8 *aad, unsigned long aad_len,
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u8 *auth_tag, unsigned long auth_tag_len)
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{
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struct crypto_aes_ctx *aes_ctx = (struct crypto_aes_ctx*)ctx;
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if ((ciphertext_len < AVX_GEN2_OPTSIZE) || (aes_ctx-> key_length != AES_KEYSIZE_128)) {
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aesni_gcm_dec(ctx, out, in, ciphertext_len, iv, hash_subkey, aad,
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aad_len, auth_tag, auth_tag_len);
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} else {
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aesni_gcm_precomp_avx_gen2(ctx, hash_subkey);
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aesni_gcm_dec_avx_gen2(ctx, out, in, ciphertext_len, iv, aad,
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aad_len, auth_tag, auth_tag_len);
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}
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}
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#endif
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#ifdef CONFIG_AS_AVX2
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/*
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* asmlinkage void aesni_gcm_precomp_avx_gen4()
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* gcm_data *my_ctx_data, context data
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* u8 *hash_subkey, the Hash sub key input. Data starts on a 16-byte boundary.
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*/
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asmlinkage void aesni_gcm_precomp_avx_gen4(void *my_ctx_data, u8 *hash_subkey);
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asmlinkage void aesni_gcm_enc_avx_gen4(void *ctx, u8 *out,
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const u8 *in, unsigned long plaintext_len, u8 *iv,
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const u8 *aad, unsigned long aad_len,
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u8 *auth_tag, unsigned long auth_tag_len);
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asmlinkage void aesni_gcm_dec_avx_gen4(void *ctx, u8 *out,
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const u8 *in, unsigned long ciphertext_len, u8 *iv,
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const u8 *aad, unsigned long aad_len,
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u8 *auth_tag, unsigned long auth_tag_len);
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static void aesni_gcm_enc_avx2(void *ctx, u8 *out,
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const u8 *in, unsigned long plaintext_len, u8 *iv,
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u8 *hash_subkey, const u8 *aad, unsigned long aad_len,
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u8 *auth_tag, unsigned long auth_tag_len)
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{
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struct crypto_aes_ctx *aes_ctx = (struct crypto_aes_ctx*)ctx;
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if ((plaintext_len < AVX_GEN2_OPTSIZE) || (aes_ctx-> key_length != AES_KEYSIZE_128)) {
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aesni_gcm_enc(ctx, out, in, plaintext_len, iv, hash_subkey, aad,
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aad_len, auth_tag, auth_tag_len);
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} else if (plaintext_len < AVX_GEN4_OPTSIZE) {
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aesni_gcm_precomp_avx_gen2(ctx, hash_subkey);
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aesni_gcm_enc_avx_gen2(ctx, out, in, plaintext_len, iv, aad,
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aad_len, auth_tag, auth_tag_len);
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} else {
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aesni_gcm_precomp_avx_gen4(ctx, hash_subkey);
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aesni_gcm_enc_avx_gen4(ctx, out, in, plaintext_len, iv, aad,
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aad_len, auth_tag, auth_tag_len);
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}
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}
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static void aesni_gcm_dec_avx2(void *ctx, u8 *out,
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const u8 *in, unsigned long ciphertext_len, u8 *iv,
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u8 *hash_subkey, const u8 *aad, unsigned long aad_len,
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u8 *auth_tag, unsigned long auth_tag_len)
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{
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struct crypto_aes_ctx *aes_ctx = (struct crypto_aes_ctx*)ctx;
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if ((ciphertext_len < AVX_GEN2_OPTSIZE) || (aes_ctx-> key_length != AES_KEYSIZE_128)) {
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aesni_gcm_dec(ctx, out, in, ciphertext_len, iv, hash_subkey,
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aad, aad_len, auth_tag, auth_tag_len);
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} else if (ciphertext_len < AVX_GEN4_OPTSIZE) {
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aesni_gcm_precomp_avx_gen2(ctx, hash_subkey);
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aesni_gcm_dec_avx_gen2(ctx, out, in, ciphertext_len, iv, aad,
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aad_len, auth_tag, auth_tag_len);
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} else {
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aesni_gcm_precomp_avx_gen4(ctx, hash_subkey);
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aesni_gcm_dec_avx_gen4(ctx, out, in, ciphertext_len, iv, aad,
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aad_len, auth_tag, auth_tag_len);
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}
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}
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#endif
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static void (*aesni_gcm_enc_tfm)(void *ctx, u8 *out,
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const u8 *in, unsigned long plaintext_len, u8 *iv,
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u8 *hash_subkey, const u8 *aad, unsigned long aad_len,
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u8 *auth_tag, unsigned long auth_tag_len);
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static void (*aesni_gcm_dec_tfm)(void *ctx, u8 *out,
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const u8 *in, unsigned long ciphertext_len, u8 *iv,
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u8 *hash_subkey, const u8 *aad, unsigned long aad_len,
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u8 *auth_tag, unsigned long auth_tag_len);
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static inline struct
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aesni_rfc4106_gcm_ctx *aesni_rfc4106_gcm_ctx_get(struct crypto_aead *tfm)
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{
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unsigned long align = AESNI_ALIGN;
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if (align <= crypto_tfm_ctx_alignment())
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align = 1;
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return PTR_ALIGN(crypto_aead_ctx(tfm), align);
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}
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#endif
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static inline struct crypto_aes_ctx *aes_ctx(void *raw_ctx)
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{
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unsigned long addr = (unsigned long)raw_ctx;
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unsigned long align = AESNI_ALIGN;
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if (align <= crypto_tfm_ctx_alignment())
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align = 1;
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return (struct crypto_aes_ctx *)ALIGN(addr, align);
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}
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static int aes_set_key_common(struct crypto_tfm *tfm, void *raw_ctx,
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const u8 *in_key, unsigned int key_len)
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{
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struct crypto_aes_ctx *ctx = aes_ctx(raw_ctx);
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u32 *flags = &tfm->crt_flags;
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int err;
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if (key_len != AES_KEYSIZE_128 && key_len != AES_KEYSIZE_192 &&
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key_len != AES_KEYSIZE_256) {
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*flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
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return -EINVAL;
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}
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if (!irq_fpu_usable())
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err = crypto_aes_expand_key(ctx, in_key, key_len);
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else {
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kernel_fpu_begin();
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err = aesni_set_key(ctx, in_key, key_len);
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kernel_fpu_end();
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}
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return err;
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}
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static int aes_set_key(struct crypto_tfm *tfm, const u8 *in_key,
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unsigned int key_len)
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{
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return aes_set_key_common(tfm, crypto_tfm_ctx(tfm), in_key, key_len);
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}
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static void aes_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
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{
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struct crypto_aes_ctx *ctx = aes_ctx(crypto_tfm_ctx(tfm));
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if (!irq_fpu_usable())
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crypto_aes_encrypt_x86(ctx, dst, src);
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else {
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kernel_fpu_begin();
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aesni_enc(ctx, dst, src);
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kernel_fpu_end();
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}
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}
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static void aes_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
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{
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struct crypto_aes_ctx *ctx = aes_ctx(crypto_tfm_ctx(tfm));
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if (!irq_fpu_usable())
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crypto_aes_decrypt_x86(ctx, dst, src);
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else {
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kernel_fpu_begin();
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aesni_dec(ctx, dst, src);
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kernel_fpu_end();
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}
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}
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static void __aes_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
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{
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struct crypto_aes_ctx *ctx = aes_ctx(crypto_tfm_ctx(tfm));
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aesni_enc(ctx, dst, src);
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}
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static void __aes_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
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{
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struct crypto_aes_ctx *ctx = aes_ctx(crypto_tfm_ctx(tfm));
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aesni_dec(ctx, dst, src);
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}
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static int aesni_skcipher_setkey(struct crypto_skcipher *tfm, const u8 *key,
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unsigned int len)
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{
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return aes_set_key_common(crypto_skcipher_tfm(tfm),
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crypto_skcipher_ctx(tfm), key, len);
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}
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static int ecb_encrypt(struct skcipher_request *req)
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{
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struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
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struct crypto_aes_ctx *ctx = aes_ctx(crypto_skcipher_ctx(tfm));
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struct skcipher_walk walk;
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unsigned int nbytes;
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int err;
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err = skcipher_walk_virt(&walk, req, true);
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kernel_fpu_begin();
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while ((nbytes = walk.nbytes)) {
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aesni_ecb_enc(ctx, walk.dst.virt.addr, walk.src.virt.addr,
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nbytes & AES_BLOCK_MASK);
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nbytes &= AES_BLOCK_SIZE - 1;
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err = skcipher_walk_done(&walk, nbytes);
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}
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kernel_fpu_end();
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return err;
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}
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static int ecb_decrypt(struct skcipher_request *req)
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{
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struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
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struct crypto_aes_ctx *ctx = aes_ctx(crypto_skcipher_ctx(tfm));
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struct skcipher_walk walk;
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unsigned int nbytes;
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int err;
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err = skcipher_walk_virt(&walk, req, true);
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kernel_fpu_begin();
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while ((nbytes = walk.nbytes)) {
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aesni_ecb_dec(ctx, walk.dst.virt.addr, walk.src.virt.addr,
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nbytes & AES_BLOCK_MASK);
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nbytes &= AES_BLOCK_SIZE - 1;
|
|
err = skcipher_walk_done(&walk, nbytes);
|
|
}
|
|
kernel_fpu_end();
|
|
|
|
return err;
|
|
}
|
|
|
|
static int cbc_encrypt(struct skcipher_request *req)
|
|
{
|
|
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
|
|
struct crypto_aes_ctx *ctx = aes_ctx(crypto_skcipher_ctx(tfm));
|
|
struct skcipher_walk walk;
|
|
unsigned int nbytes;
|
|
int err;
|
|
|
|
err = skcipher_walk_virt(&walk, req, true);
|
|
|
|
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 = skcipher_walk_done(&walk, nbytes);
|
|
}
|
|
kernel_fpu_end();
|
|
|
|
return err;
|
|
}
|
|
|
|
static int cbc_decrypt(struct skcipher_request *req)
|
|
{
|
|
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
|
|
struct crypto_aes_ctx *ctx = aes_ctx(crypto_skcipher_ctx(tfm));
|
|
struct skcipher_walk walk;
|
|
unsigned int nbytes;
|
|
int err;
|
|
|
|
err = skcipher_walk_virt(&walk, req, true);
|
|
|
|
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 = skcipher_walk_done(&walk, nbytes);
|
|
}
|
|
kernel_fpu_end();
|
|
|
|
return err;
|
|
}
|
|
|
|
#ifdef CONFIG_X86_64
|
|
static void ctr_crypt_final(struct crypto_aes_ctx *ctx,
|
|
struct skcipher_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);
|
|
}
|
|
|
|
#ifdef CONFIG_AS_AVX
|
|
static void aesni_ctr_enc_avx_tfm(struct crypto_aes_ctx *ctx, u8 *out,
|
|
const u8 *in, unsigned int len, u8 *iv)
|
|
{
|
|
/*
|
|
* based on key length, override with the by8 version
|
|
* of ctr mode encryption/decryption for improved performance
|
|
* aes_set_key_common() ensures that key length is one of
|
|
* {128,192,256}
|
|
*/
|
|
if (ctx->key_length == AES_KEYSIZE_128)
|
|
aes_ctr_enc_128_avx_by8(in, iv, (void *)ctx, out, len);
|
|
else if (ctx->key_length == AES_KEYSIZE_192)
|
|
aes_ctr_enc_192_avx_by8(in, iv, (void *)ctx, out, len);
|
|
else
|
|
aes_ctr_enc_256_avx_by8(in, iv, (void *)ctx, out, len);
|
|
}
|
|
#endif
|
|
|
|
static int ctr_crypt(struct skcipher_request *req)
|
|
{
|
|
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
|
|
struct crypto_aes_ctx *ctx = aes_ctx(crypto_skcipher_ctx(tfm));
|
|
struct skcipher_walk walk;
|
|
unsigned int nbytes;
|
|
int err;
|
|
|
|
err = skcipher_walk_virt(&walk, req, true);
|
|
|
|
kernel_fpu_begin();
|
|
while ((nbytes = walk.nbytes) >= AES_BLOCK_SIZE) {
|
|
aesni_ctr_enc_tfm(ctx, walk.dst.virt.addr, walk.src.virt.addr,
|
|
nbytes & AES_BLOCK_MASK, walk.iv);
|
|
nbytes &= AES_BLOCK_SIZE - 1;
|
|
err = skcipher_walk_done(&walk, nbytes);
|
|
}
|
|
if (walk.nbytes) {
|
|
ctr_crypt_final(ctx, &walk);
|
|
err = skcipher_walk_done(&walk, 0);
|
|
}
|
|
kernel_fpu_end();
|
|
|
|
return err;
|
|
}
|
|
|
|
static int xts_aesni_setkey(struct crypto_skcipher *tfm, const u8 *key,
|
|
unsigned int keylen)
|
|
{
|
|
struct aesni_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
|
|
int err;
|
|
|
|
err = xts_verify_key(tfm, key, keylen);
|
|
if (err)
|
|
return err;
|
|
|
|
keylen /= 2;
|
|
|
|
/* first half of xts-key is for crypt */
|
|
err = aes_set_key_common(crypto_skcipher_tfm(tfm), ctx->raw_crypt_ctx,
|
|
key, keylen);
|
|
if (err)
|
|
return err;
|
|
|
|
/* second half of xts-key is for tweak */
|
|
return aes_set_key_common(crypto_skcipher_tfm(tfm), ctx->raw_tweak_ctx,
|
|
key + keylen, keylen);
|
|
}
|
|
|
|
|
|
static void aesni_xts_tweak(void *ctx, u8 *out, const u8 *in)
|
|
{
|
|
aesni_enc(ctx, out, in);
|
|
}
|
|
|
|
static void aesni_xts_enc(void *ctx, u128 *dst, const u128 *src, le128 *iv)
|
|
{
|
|
glue_xts_crypt_128bit_one(ctx, dst, src, iv, GLUE_FUNC_CAST(aesni_enc));
|
|
}
|
|
|
|
static void aesni_xts_dec(void *ctx, u128 *dst, const u128 *src, le128 *iv)
|
|
{
|
|
glue_xts_crypt_128bit_one(ctx, dst, src, iv, GLUE_FUNC_CAST(aesni_dec));
|
|
}
|
|
|
|
static void aesni_xts_enc8(void *ctx, u128 *dst, const u128 *src, le128 *iv)
|
|
{
|
|
aesni_xts_crypt8(ctx, (u8 *)dst, (const u8 *)src, true, (u8 *)iv);
|
|
}
|
|
|
|
static void aesni_xts_dec8(void *ctx, u128 *dst, const u128 *src, le128 *iv)
|
|
{
|
|
aesni_xts_crypt8(ctx, (u8 *)dst, (const u8 *)src, false, (u8 *)iv);
|
|
}
|
|
|
|
static const struct common_glue_ctx aesni_enc_xts = {
|
|
.num_funcs = 2,
|
|
.fpu_blocks_limit = 1,
|
|
|
|
.funcs = { {
|
|
.num_blocks = 8,
|
|
.fn_u = { .xts = GLUE_XTS_FUNC_CAST(aesni_xts_enc8) }
|
|
}, {
|
|
.num_blocks = 1,
|
|
.fn_u = { .xts = GLUE_XTS_FUNC_CAST(aesni_xts_enc) }
|
|
} }
|
|
};
|
|
|
|
static const struct common_glue_ctx aesni_dec_xts = {
|
|
.num_funcs = 2,
|
|
.fpu_blocks_limit = 1,
|
|
|
|
.funcs = { {
|
|
.num_blocks = 8,
|
|
.fn_u = { .xts = GLUE_XTS_FUNC_CAST(aesni_xts_dec8) }
|
|
}, {
|
|
.num_blocks = 1,
|
|
.fn_u = { .xts = GLUE_XTS_FUNC_CAST(aesni_xts_dec) }
|
|
} }
|
|
};
|
|
|
|
static int xts_encrypt(struct skcipher_request *req)
|
|
{
|
|
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
|
|
struct aesni_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
|
|
|
|
return glue_xts_req_128bit(&aesni_enc_xts, req,
|
|
XTS_TWEAK_CAST(aesni_xts_tweak),
|
|
aes_ctx(ctx->raw_tweak_ctx),
|
|
aes_ctx(ctx->raw_crypt_ctx));
|
|
}
|
|
|
|
static int xts_decrypt(struct skcipher_request *req)
|
|
{
|
|
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
|
|
struct aesni_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
|
|
|
|
return glue_xts_req_128bit(&aesni_dec_xts, req,
|
|
XTS_TWEAK_CAST(aesni_xts_tweak),
|
|
aes_ctx(ctx->raw_tweak_ctx),
|
|
aes_ctx(ctx->raw_crypt_ctx));
|
|
}
|
|
|
|
static int rfc4106_init(struct crypto_aead *aead)
|
|
{
|
|
struct cryptd_aead *cryptd_tfm;
|
|
struct cryptd_aead **ctx = crypto_aead_ctx(aead);
|
|
|
|
cryptd_tfm = cryptd_alloc_aead("__driver-gcm-aes-aesni",
|
|
CRYPTO_ALG_INTERNAL,
|
|
CRYPTO_ALG_INTERNAL);
|
|
if (IS_ERR(cryptd_tfm))
|
|
return PTR_ERR(cryptd_tfm);
|
|
|
|
*ctx = cryptd_tfm;
|
|
crypto_aead_set_reqsize(aead, crypto_aead_reqsize(&cryptd_tfm->base));
|
|
return 0;
|
|
}
|
|
|
|
static void rfc4106_exit(struct crypto_aead *aead)
|
|
{
|
|
struct cryptd_aead **ctx = crypto_aead_ctx(aead);
|
|
|
|
cryptd_free_aead(*ctx);
|
|
}
|
|
|
|
static int
|
|
rfc4106_set_hash_subkey(u8 *hash_subkey, const u8 *key, unsigned int key_len)
|
|
{
|
|
struct crypto_cipher *tfm;
|
|
int ret;
|
|
|
|
tfm = crypto_alloc_cipher("aes", 0, 0);
|
|
if (IS_ERR(tfm))
|
|
return PTR_ERR(tfm);
|
|
|
|
ret = crypto_cipher_setkey(tfm, key, key_len);
|
|
if (ret)
|
|
goto out_free_cipher;
|
|
|
|
/* Clear the data in the hash sub key container to zero.*/
|
|
/* We want to cipher all zeros to create the hash sub key. */
|
|
memset(hash_subkey, 0, RFC4106_HASH_SUBKEY_SIZE);
|
|
|
|
crypto_cipher_encrypt_one(tfm, hash_subkey, hash_subkey);
|
|
|
|
out_free_cipher:
|
|
crypto_free_cipher(tfm);
|
|
return ret;
|
|
}
|
|
|
|
static int common_rfc4106_set_key(struct crypto_aead *aead, const u8 *key,
|
|
unsigned int key_len)
|
|
{
|
|
struct aesni_rfc4106_gcm_ctx *ctx = aesni_rfc4106_gcm_ctx_get(aead);
|
|
|
|
if (key_len < 4) {
|
|
crypto_aead_set_flags(aead, CRYPTO_TFM_RES_BAD_KEY_LEN);
|
|
return -EINVAL;
|
|
}
|
|
/*Account for 4 byte nonce at the end.*/
|
|
key_len -= 4;
|
|
|
|
memcpy(ctx->nonce, key + key_len, sizeof(ctx->nonce));
|
|
|
|
return aes_set_key_common(crypto_aead_tfm(aead),
|
|
&ctx->aes_key_expanded, key, key_len) ?:
|
|
rfc4106_set_hash_subkey(ctx->hash_subkey, key, key_len);
|
|
}
|
|
|
|
static int rfc4106_set_key(struct crypto_aead *parent, const u8 *key,
|
|
unsigned int key_len)
|
|
{
|
|
struct cryptd_aead **ctx = crypto_aead_ctx(parent);
|
|
struct cryptd_aead *cryptd_tfm = *ctx;
|
|
|
|
return crypto_aead_setkey(&cryptd_tfm->base, key, key_len);
|
|
}
|
|
|
|
static int common_rfc4106_set_authsize(struct crypto_aead *aead,
|
|
unsigned int authsize)
|
|
{
|
|
switch (authsize) {
|
|
case 8:
|
|
case 12:
|
|
case 16:
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* This is the Integrity Check Value (aka the authentication tag length and can
|
|
* be 8, 12 or 16 bytes long. */
|
|
static int rfc4106_set_authsize(struct crypto_aead *parent,
|
|
unsigned int authsize)
|
|
{
|
|
struct cryptd_aead **ctx = crypto_aead_ctx(parent);
|
|
struct cryptd_aead *cryptd_tfm = *ctx;
|
|
|
|
return crypto_aead_setauthsize(&cryptd_tfm->base, authsize);
|
|
}
|
|
|
|
static int helper_rfc4106_encrypt(struct aead_request *req)
|
|
{
|
|
u8 one_entry_in_sg = 0;
|
|
u8 *src, *dst, *assoc;
|
|
__be32 counter = cpu_to_be32(1);
|
|
struct crypto_aead *tfm = crypto_aead_reqtfm(req);
|
|
struct aesni_rfc4106_gcm_ctx *ctx = aesni_rfc4106_gcm_ctx_get(tfm);
|
|
void *aes_ctx = &(ctx->aes_key_expanded);
|
|
unsigned long auth_tag_len = crypto_aead_authsize(tfm);
|
|
u8 iv[16] __attribute__ ((__aligned__(AESNI_ALIGN)));
|
|
struct scatter_walk src_sg_walk;
|
|
struct scatter_walk dst_sg_walk = {};
|
|
unsigned int i;
|
|
|
|
/* Assuming we are supporting rfc4106 64-bit extended */
|
|
/* sequence numbers We need to have the AAD length equal */
|
|
/* to 16 or 20 bytes */
|
|
if (unlikely(req->assoclen != 16 && req->assoclen != 20))
|
|
return -EINVAL;
|
|
|
|
/* IV below built */
|
|
for (i = 0; i < 4; i++)
|
|
*(iv+i) = ctx->nonce[i];
|
|
for (i = 0; i < 8; i++)
|
|
*(iv+4+i) = req->iv[i];
|
|
*((__be32 *)(iv+12)) = counter;
|
|
|
|
if (sg_is_last(req->src) &&
|
|
(!PageHighMem(sg_page(req->src)) ||
|
|
req->src->offset + req->src->length <= PAGE_SIZE) &&
|
|
sg_is_last(req->dst) &&
|
|
(!PageHighMem(sg_page(req->dst)) ||
|
|
req->dst->offset + req->dst->length <= PAGE_SIZE)) {
|
|
one_entry_in_sg = 1;
|
|
scatterwalk_start(&src_sg_walk, req->src);
|
|
assoc = scatterwalk_map(&src_sg_walk);
|
|
src = assoc + req->assoclen;
|
|
dst = src;
|
|
if (unlikely(req->src != req->dst)) {
|
|
scatterwalk_start(&dst_sg_walk, req->dst);
|
|
dst = scatterwalk_map(&dst_sg_walk) + req->assoclen;
|
|
}
|
|
} else {
|
|
/* Allocate memory for src, dst, assoc */
|
|
assoc = kmalloc(req->cryptlen + auth_tag_len + req->assoclen,
|
|
GFP_ATOMIC);
|
|
if (unlikely(!assoc))
|
|
return -ENOMEM;
|
|
scatterwalk_map_and_copy(assoc, req->src, 0,
|
|
req->assoclen + req->cryptlen, 0);
|
|
src = assoc + req->assoclen;
|
|
dst = src;
|
|
}
|
|
|
|
kernel_fpu_begin();
|
|
aesni_gcm_enc_tfm(aes_ctx, dst, src, req->cryptlen, iv,
|
|
ctx->hash_subkey, assoc, req->assoclen - 8,
|
|
dst + req->cryptlen, auth_tag_len);
|
|
kernel_fpu_end();
|
|
|
|
/* The authTag (aka the Integrity Check Value) needs to be written
|
|
* back to the packet. */
|
|
if (one_entry_in_sg) {
|
|
if (unlikely(req->src != req->dst)) {
|
|
scatterwalk_unmap(dst - req->assoclen);
|
|
scatterwalk_advance(&dst_sg_walk, req->dst->length);
|
|
scatterwalk_done(&dst_sg_walk, 1, 0);
|
|
}
|
|
scatterwalk_unmap(assoc);
|
|
scatterwalk_advance(&src_sg_walk, req->src->length);
|
|
scatterwalk_done(&src_sg_walk, req->src == req->dst, 0);
|
|
} else {
|
|
scatterwalk_map_and_copy(dst, req->dst, req->assoclen,
|
|
req->cryptlen + auth_tag_len, 1);
|
|
kfree(assoc);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int helper_rfc4106_decrypt(struct aead_request *req)
|
|
{
|
|
u8 one_entry_in_sg = 0;
|
|
u8 *src, *dst, *assoc;
|
|
unsigned long tempCipherLen = 0;
|
|
__be32 counter = cpu_to_be32(1);
|
|
int retval = 0;
|
|
struct crypto_aead *tfm = crypto_aead_reqtfm(req);
|
|
struct aesni_rfc4106_gcm_ctx *ctx = aesni_rfc4106_gcm_ctx_get(tfm);
|
|
void *aes_ctx = &(ctx->aes_key_expanded);
|
|
unsigned long auth_tag_len = crypto_aead_authsize(tfm);
|
|
u8 iv[16] __attribute__ ((__aligned__(AESNI_ALIGN)));
|
|
u8 authTag[16];
|
|
struct scatter_walk src_sg_walk;
|
|
struct scatter_walk dst_sg_walk = {};
|
|
unsigned int i;
|
|
|
|
if (unlikely(req->assoclen != 16 && req->assoclen != 20))
|
|
return -EINVAL;
|
|
|
|
/* Assuming we are supporting rfc4106 64-bit extended */
|
|
/* sequence numbers We need to have the AAD length */
|
|
/* equal to 16 or 20 bytes */
|
|
|
|
tempCipherLen = (unsigned long)(req->cryptlen - auth_tag_len);
|
|
/* IV below built */
|
|
for (i = 0; i < 4; i++)
|
|
*(iv+i) = ctx->nonce[i];
|
|
for (i = 0; i < 8; i++)
|
|
*(iv+4+i) = req->iv[i];
|
|
*((__be32 *)(iv+12)) = counter;
|
|
|
|
if (sg_is_last(req->src) &&
|
|
(!PageHighMem(sg_page(req->src)) ||
|
|
req->src->offset + req->src->length <= PAGE_SIZE) &&
|
|
sg_is_last(req->dst) &&
|
|
(!PageHighMem(sg_page(req->dst)) ||
|
|
req->dst->offset + req->dst->length <= PAGE_SIZE)) {
|
|
one_entry_in_sg = 1;
|
|
scatterwalk_start(&src_sg_walk, req->src);
|
|
assoc = scatterwalk_map(&src_sg_walk);
|
|
src = assoc + req->assoclen;
|
|
dst = src;
|
|
if (unlikely(req->src != req->dst)) {
|
|
scatterwalk_start(&dst_sg_walk, req->dst);
|
|
dst = scatterwalk_map(&dst_sg_walk) + req->assoclen;
|
|
}
|
|
|
|
} else {
|
|
/* Allocate memory for src, dst, assoc */
|
|
assoc = kmalloc(req->cryptlen + req->assoclen, GFP_ATOMIC);
|
|
if (!assoc)
|
|
return -ENOMEM;
|
|
scatterwalk_map_and_copy(assoc, req->src, 0,
|
|
req->assoclen + req->cryptlen, 0);
|
|
src = assoc + req->assoclen;
|
|
dst = src;
|
|
}
|
|
|
|
kernel_fpu_begin();
|
|
aesni_gcm_dec_tfm(aes_ctx, dst, src, tempCipherLen, iv,
|
|
ctx->hash_subkey, assoc, req->assoclen - 8,
|
|
authTag, auth_tag_len);
|
|
kernel_fpu_end();
|
|
|
|
/* Compare generated tag with passed in tag. */
|
|
retval = crypto_memneq(src + tempCipherLen, authTag, auth_tag_len) ?
|
|
-EBADMSG : 0;
|
|
|
|
if (one_entry_in_sg) {
|
|
if (unlikely(req->src != req->dst)) {
|
|
scatterwalk_unmap(dst - req->assoclen);
|
|
scatterwalk_advance(&dst_sg_walk, req->dst->length);
|
|
scatterwalk_done(&dst_sg_walk, 1, 0);
|
|
}
|
|
scatterwalk_unmap(assoc);
|
|
scatterwalk_advance(&src_sg_walk, req->src->length);
|
|
scatterwalk_done(&src_sg_walk, req->src == req->dst, 0);
|
|
} else {
|
|
scatterwalk_map_and_copy(dst, req->dst, req->assoclen,
|
|
tempCipherLen, 1);
|
|
kfree(assoc);
|
|
}
|
|
return retval;
|
|
}
|
|
|
|
static int rfc4106_encrypt(struct aead_request *req)
|
|
{
|
|
struct crypto_aead *tfm = crypto_aead_reqtfm(req);
|
|
struct cryptd_aead **ctx = crypto_aead_ctx(tfm);
|
|
struct cryptd_aead *cryptd_tfm = *ctx;
|
|
|
|
tfm = &cryptd_tfm->base;
|
|
if (irq_fpu_usable() && (!in_atomic() ||
|
|
!cryptd_aead_queued(cryptd_tfm)))
|
|
tfm = cryptd_aead_child(cryptd_tfm);
|
|
|
|
aead_request_set_tfm(req, tfm);
|
|
|
|
return crypto_aead_encrypt(req);
|
|
}
|
|
|
|
static int rfc4106_decrypt(struct aead_request *req)
|
|
{
|
|
struct crypto_aead *tfm = crypto_aead_reqtfm(req);
|
|
struct cryptd_aead **ctx = crypto_aead_ctx(tfm);
|
|
struct cryptd_aead *cryptd_tfm = *ctx;
|
|
|
|
tfm = &cryptd_tfm->base;
|
|
if (irq_fpu_usable() && (!in_atomic() ||
|
|
!cryptd_aead_queued(cryptd_tfm)))
|
|
tfm = cryptd_aead_child(cryptd_tfm);
|
|
|
|
aead_request_set_tfm(req, tfm);
|
|
|
|
return crypto_aead_decrypt(req);
|
|
}
|
|
#endif
|
|
|
|
static struct crypto_alg aesni_algs[] = { {
|
|
.cra_name = "aes",
|
|
.cra_driver_name = "aes-aesni",
|
|
.cra_priority = 300,
|
|
.cra_flags = CRYPTO_ALG_TYPE_CIPHER,
|
|
.cra_blocksize = AES_BLOCK_SIZE,
|
|
.cra_ctxsize = CRYPTO_AES_CTX_SIZE,
|
|
.cra_module = THIS_MODULE,
|
|
.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
|
|
}
|
|
}
|
|
}, {
|
|
.cra_name = "__aes",
|
|
.cra_driver_name = "__aes-aesni",
|
|
.cra_priority = 300,
|
|
.cra_flags = CRYPTO_ALG_TYPE_CIPHER | CRYPTO_ALG_INTERNAL,
|
|
.cra_blocksize = AES_BLOCK_SIZE,
|
|
.cra_ctxsize = CRYPTO_AES_CTX_SIZE,
|
|
.cra_module = THIS_MODULE,
|
|
.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 struct skcipher_alg aesni_skciphers[] = {
|
|
{
|
|
.base = {
|
|
.cra_name = "__ecb(aes)",
|
|
.cra_driver_name = "__ecb-aes-aesni",
|
|
.cra_priority = 400,
|
|
.cra_flags = CRYPTO_ALG_INTERNAL,
|
|
.cra_blocksize = AES_BLOCK_SIZE,
|
|
.cra_ctxsize = CRYPTO_AES_CTX_SIZE,
|
|
.cra_module = THIS_MODULE,
|
|
},
|
|
.min_keysize = AES_MIN_KEY_SIZE,
|
|
.max_keysize = AES_MAX_KEY_SIZE,
|
|
.setkey = aesni_skcipher_setkey,
|
|
.encrypt = ecb_encrypt,
|
|
.decrypt = ecb_decrypt,
|
|
}, {
|
|
.base = {
|
|
.cra_name = "__cbc(aes)",
|
|
.cra_driver_name = "__cbc-aes-aesni",
|
|
.cra_priority = 400,
|
|
.cra_flags = CRYPTO_ALG_INTERNAL,
|
|
.cra_blocksize = AES_BLOCK_SIZE,
|
|
.cra_ctxsize = CRYPTO_AES_CTX_SIZE,
|
|
.cra_module = THIS_MODULE,
|
|
},
|
|
.min_keysize = AES_MIN_KEY_SIZE,
|
|
.max_keysize = AES_MAX_KEY_SIZE,
|
|
.ivsize = AES_BLOCK_SIZE,
|
|
.setkey = aesni_skcipher_setkey,
|
|
.encrypt = cbc_encrypt,
|
|
.decrypt = cbc_decrypt,
|
|
#ifdef CONFIG_X86_64
|
|
}, {
|
|
.base = {
|
|
.cra_name = "__ctr(aes)",
|
|
.cra_driver_name = "__ctr-aes-aesni",
|
|
.cra_priority = 400,
|
|
.cra_flags = CRYPTO_ALG_INTERNAL,
|
|
.cra_blocksize = 1,
|
|
.cra_ctxsize = CRYPTO_AES_CTX_SIZE,
|
|
.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 = aesni_skcipher_setkey,
|
|
.encrypt = ctr_crypt,
|
|
.decrypt = ctr_crypt,
|
|
}, {
|
|
.base = {
|
|
.cra_name = "__xts(aes)",
|
|
.cra_driver_name = "__xts-aes-aesni",
|
|
.cra_priority = 401,
|
|
.cra_flags = CRYPTO_ALG_INTERNAL,
|
|
.cra_blocksize = AES_BLOCK_SIZE,
|
|
.cra_ctxsize = XTS_AES_CTX_SIZE,
|
|
.cra_module = THIS_MODULE,
|
|
},
|
|
.min_keysize = 2 * AES_MIN_KEY_SIZE,
|
|
.max_keysize = 2 * AES_MAX_KEY_SIZE,
|
|
.ivsize = AES_BLOCK_SIZE,
|
|
.setkey = xts_aesni_setkey,
|
|
.encrypt = xts_encrypt,
|
|
.decrypt = xts_decrypt,
|
|
#endif
|
|
}
|
|
};
|
|
|
|
struct simd_skcipher_alg *aesni_simd_skciphers[ARRAY_SIZE(aesni_skciphers)];
|
|
|
|
struct {
|
|
const char *algname;
|
|
const char *drvname;
|
|
const char *basename;
|
|
struct simd_skcipher_alg *simd;
|
|
} aesni_simd_skciphers2[] = {
|
|
#if (defined(MODULE) && IS_ENABLED(CONFIG_CRYPTO_PCBC)) || \
|
|
IS_BUILTIN(CONFIG_CRYPTO_PCBC)
|
|
{
|
|
.algname = "pcbc(aes)",
|
|
.drvname = "pcbc-aes-aesni",
|
|
.basename = "fpu(pcbc(__aes-aesni))",
|
|
},
|
|
#endif
|
|
};
|
|
|
|
#ifdef CONFIG_X86_64
|
|
static struct aead_alg aesni_aead_algs[] = { {
|
|
.setkey = common_rfc4106_set_key,
|
|
.setauthsize = common_rfc4106_set_authsize,
|
|
.encrypt = helper_rfc4106_encrypt,
|
|
.decrypt = helper_rfc4106_decrypt,
|
|
.ivsize = 8,
|
|
.maxauthsize = 16,
|
|
.base = {
|
|
.cra_name = "__gcm-aes-aesni",
|
|
.cra_driver_name = "__driver-gcm-aes-aesni",
|
|
.cra_flags = CRYPTO_ALG_INTERNAL,
|
|
.cra_blocksize = 1,
|
|
.cra_ctxsize = sizeof(struct aesni_rfc4106_gcm_ctx),
|
|
.cra_alignmask = AESNI_ALIGN - 1,
|
|
.cra_module = THIS_MODULE,
|
|
},
|
|
}, {
|
|
.init = rfc4106_init,
|
|
.exit = rfc4106_exit,
|
|
.setkey = rfc4106_set_key,
|
|
.setauthsize = rfc4106_set_authsize,
|
|
.encrypt = rfc4106_encrypt,
|
|
.decrypt = rfc4106_decrypt,
|
|
.ivsize = 8,
|
|
.maxauthsize = 16,
|
|
.base = {
|
|
.cra_name = "rfc4106(gcm(aes))",
|
|
.cra_driver_name = "rfc4106-gcm-aesni",
|
|
.cra_priority = 400,
|
|
.cra_flags = CRYPTO_ALG_ASYNC,
|
|
.cra_blocksize = 1,
|
|
.cra_ctxsize = sizeof(struct cryptd_aead *),
|
|
.cra_module = THIS_MODULE,
|
|
},
|
|
} };
|
|
#else
|
|
static struct aead_alg aesni_aead_algs[0];
|
|
#endif
|
|
|
|
|
|
static const struct x86_cpu_id aesni_cpu_id[] = {
|
|
X86_FEATURE_MATCH(X86_FEATURE_AES),
|
|
{}
|
|
};
|
|
MODULE_DEVICE_TABLE(x86cpu, aesni_cpu_id);
|
|
|
|
static void aesni_free_simds(void)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(aesni_simd_skciphers) &&
|
|
aesni_simd_skciphers[i]; i++)
|
|
simd_skcipher_free(aesni_simd_skciphers[i]);
|
|
|
|
for (i = 0; i < ARRAY_SIZE(aesni_simd_skciphers2); i++)
|
|
if (aesni_simd_skciphers2[i].simd)
|
|
simd_skcipher_free(aesni_simd_skciphers2[i].simd);
|
|
}
|
|
|
|
static int __init aesni_init(void)
|
|
{
|
|
struct simd_skcipher_alg *simd;
|
|
const char *basename;
|
|
const char *algname;
|
|
const char *drvname;
|
|
int err;
|
|
int i;
|
|
|
|
if (!x86_match_cpu(aesni_cpu_id))
|
|
return -ENODEV;
|
|
#ifdef CONFIG_X86_64
|
|
#ifdef CONFIG_AS_AVX2
|
|
if (boot_cpu_has(X86_FEATURE_AVX2)) {
|
|
pr_info("AVX2 version of gcm_enc/dec engaged.\n");
|
|
aesni_gcm_enc_tfm = aesni_gcm_enc_avx2;
|
|
aesni_gcm_dec_tfm = aesni_gcm_dec_avx2;
|
|
} else
|
|
#endif
|
|
#ifdef CONFIG_AS_AVX
|
|
if (boot_cpu_has(X86_FEATURE_AVX)) {
|
|
pr_info("AVX version of gcm_enc/dec engaged.\n");
|
|
aesni_gcm_enc_tfm = aesni_gcm_enc_avx;
|
|
aesni_gcm_dec_tfm = aesni_gcm_dec_avx;
|
|
} else
|
|
#endif
|
|
{
|
|
pr_info("SSE version of gcm_enc/dec engaged.\n");
|
|
aesni_gcm_enc_tfm = aesni_gcm_enc;
|
|
aesni_gcm_dec_tfm = aesni_gcm_dec;
|
|
}
|
|
aesni_ctr_enc_tfm = aesni_ctr_enc;
|
|
#ifdef CONFIG_AS_AVX
|
|
if (boot_cpu_has(X86_FEATURE_AVX)) {
|
|
/* optimize performance of ctr mode encryption transform */
|
|
aesni_ctr_enc_tfm = aesni_ctr_enc_avx_tfm;
|
|
pr_info("AES CTR mode by8 optimization enabled\n");
|
|
}
|
|
#endif
|
|
#endif
|
|
|
|
err = crypto_fpu_init();
|
|
if (err)
|
|
return err;
|
|
|
|
err = crypto_register_algs(aesni_algs, ARRAY_SIZE(aesni_algs));
|
|
if (err)
|
|
goto fpu_exit;
|
|
|
|
err = crypto_register_skciphers(aesni_skciphers,
|
|
ARRAY_SIZE(aesni_skciphers));
|
|
if (err)
|
|
goto unregister_algs;
|
|
|
|
err = crypto_register_aeads(aesni_aead_algs,
|
|
ARRAY_SIZE(aesni_aead_algs));
|
|
if (err)
|
|
goto unregister_skciphers;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(aesni_skciphers); i++) {
|
|
algname = aesni_skciphers[i].base.cra_name + 2;
|
|
drvname = aesni_skciphers[i].base.cra_driver_name + 2;
|
|
basename = aesni_skciphers[i].base.cra_driver_name;
|
|
simd = simd_skcipher_create_compat(algname, drvname, basename);
|
|
err = PTR_ERR(simd);
|
|
if (IS_ERR(simd))
|
|
goto unregister_simds;
|
|
|
|
aesni_simd_skciphers[i] = simd;
|
|
}
|
|
|
|
for (i = 0; i < ARRAY_SIZE(aesni_simd_skciphers2); i++) {
|
|
algname = aesni_simd_skciphers2[i].algname;
|
|
drvname = aesni_simd_skciphers2[i].drvname;
|
|
basename = aesni_simd_skciphers2[i].basename;
|
|
simd = simd_skcipher_create_compat(algname, drvname, basename);
|
|
err = PTR_ERR(simd);
|
|
if (IS_ERR(simd))
|
|
continue;
|
|
|
|
aesni_simd_skciphers2[i].simd = simd;
|
|
}
|
|
|
|
return 0;
|
|
|
|
unregister_simds:
|
|
aesni_free_simds();
|
|
crypto_unregister_aeads(aesni_aead_algs, ARRAY_SIZE(aesni_aead_algs));
|
|
unregister_skciphers:
|
|
crypto_unregister_skciphers(aesni_skciphers,
|
|
ARRAY_SIZE(aesni_skciphers));
|
|
unregister_algs:
|
|
crypto_unregister_algs(aesni_algs, ARRAY_SIZE(aesni_algs));
|
|
fpu_exit:
|
|
crypto_fpu_exit();
|
|
return err;
|
|
}
|
|
|
|
static void __exit aesni_exit(void)
|
|
{
|
|
aesni_free_simds();
|
|
crypto_unregister_aeads(aesni_aead_algs, ARRAY_SIZE(aesni_aead_algs));
|
|
crypto_unregister_skciphers(aesni_skciphers,
|
|
ARRAY_SIZE(aesni_skciphers));
|
|
crypto_unregister_algs(aesni_algs, ARRAY_SIZE(aesni_algs));
|
|
|
|
crypto_fpu_exit();
|
|
}
|
|
|
|
late_initcall(aesni_init);
|
|
module_exit(aesni_exit);
|
|
|
|
MODULE_DESCRIPTION("Rijndael (AES) Cipher Algorithm, Intel AES-NI instructions optimized");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS_CRYPTO("aes");
|