1383 lines
39 KiB
C
1383 lines
39 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/crypto.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 <asm/i387.h>
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#include <asm/aes.h>
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#include <crypto/scatterwalk.h>
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#include <crypto/internal/aead.h>
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#include <linux/workqueue.h>
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#include <linux/spinlock.h>
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#if defined(CONFIG_CRYPTO_CTR) || defined(CONFIG_CRYPTO_CTR_MODULE)
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#define HAS_CTR
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#endif
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#if defined(CONFIG_CRYPTO_LRW) || defined(CONFIG_CRYPTO_LRW_MODULE)
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#define HAS_LRW
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#endif
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#if defined(CONFIG_CRYPTO_PCBC) || defined(CONFIG_CRYPTO_PCBC_MODULE)
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#define HAS_PCBC
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#endif
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#if defined(CONFIG_CRYPTO_XTS) || defined(CONFIG_CRYPTO_XTS_MODULE)
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#define HAS_XTS
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#endif
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struct async_aes_ctx {
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struct cryptd_ablkcipher *cryptd_tfm;
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};
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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];
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struct crypto_aes_ctx aes_key_expanded;
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u8 nonce[4];
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struct cryptd_aead *cryptd_tfm;
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};
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struct aesni_gcm_set_hash_subkey_result {
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int err;
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struct completion completion;
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};
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struct aesni_hash_subkey_req_data {
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u8 iv[16];
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struct aesni_gcm_set_hash_subkey_result result;
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struct scatterlist sg;
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};
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#define AESNI_ALIGN (16)
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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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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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#ifdef CONFIG_X86_64
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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_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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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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return
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(struct aesni_rfc4106_gcm_ctx *)
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PTR_ALIGN((u8 *)
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crypto_tfm_ctx(crypto_aead_tfm(tfm)), AESNI_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 struct crypto_alg aesni_alg = {
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.cra_name = "aes",
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.cra_driver_name = "aes-aesni",
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.cra_priority = 300,
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.cra_flags = CRYPTO_ALG_TYPE_CIPHER,
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.cra_blocksize = AES_BLOCK_SIZE,
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.cra_ctxsize = sizeof(struct crypto_aes_ctx)+AESNI_ALIGN-1,
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.cra_alignmask = 0,
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.cra_module = THIS_MODULE,
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.cra_list = LIST_HEAD_INIT(aesni_alg.cra_list),
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.cra_u = {
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.cipher = {
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.cia_min_keysize = AES_MIN_KEY_SIZE,
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.cia_max_keysize = AES_MAX_KEY_SIZE,
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.cia_setkey = aes_set_key,
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.cia_encrypt = aes_encrypt,
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.cia_decrypt = aes_decrypt
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}
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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 struct crypto_alg __aesni_alg = {
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.cra_name = "__aes-aesni",
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.cra_driver_name = "__driver-aes-aesni",
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.cra_priority = 0,
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.cra_flags = CRYPTO_ALG_TYPE_CIPHER,
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.cra_blocksize = AES_BLOCK_SIZE,
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.cra_ctxsize = sizeof(struct crypto_aes_ctx)+AESNI_ALIGN-1,
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.cra_alignmask = 0,
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.cra_module = THIS_MODULE,
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.cra_list = LIST_HEAD_INIT(__aesni_alg.cra_list),
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.cra_u = {
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.cipher = {
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.cia_min_keysize = AES_MIN_KEY_SIZE,
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.cia_max_keysize = AES_MAX_KEY_SIZE,
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.cia_setkey = aes_set_key,
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.cia_encrypt = __aes_encrypt,
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.cia_decrypt = __aes_decrypt
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}
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}
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};
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static int ecb_encrypt(struct blkcipher_desc *desc,
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struct scatterlist *dst, struct scatterlist *src,
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unsigned int nbytes)
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{
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struct crypto_aes_ctx *ctx = aes_ctx(crypto_blkcipher_ctx(desc->tfm));
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struct blkcipher_walk walk;
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int err;
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blkcipher_walk_init(&walk, dst, src, nbytes);
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err = blkcipher_walk_virt(desc, &walk);
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desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
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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 = blkcipher_walk_done(desc, &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 blkcipher_desc *desc,
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struct scatterlist *dst, struct scatterlist *src,
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unsigned int nbytes)
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{
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struct crypto_aes_ctx *ctx = aes_ctx(crypto_blkcipher_ctx(desc->tfm));
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struct blkcipher_walk walk;
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int err;
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blkcipher_walk_init(&walk, dst, src, nbytes);
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err = blkcipher_walk_virt(desc, &walk);
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desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
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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;
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err = blkcipher_walk_done(desc, &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 struct crypto_alg blk_ecb_alg = {
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.cra_name = "__ecb-aes-aesni",
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.cra_driver_name = "__driver-ecb-aes-aesni",
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.cra_priority = 0,
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.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
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.cra_blocksize = AES_BLOCK_SIZE,
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.cra_ctxsize = sizeof(struct crypto_aes_ctx)+AESNI_ALIGN-1,
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.cra_alignmask = 0,
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.cra_type = &crypto_blkcipher_type,
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.cra_module = THIS_MODULE,
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.cra_list = LIST_HEAD_INIT(blk_ecb_alg.cra_list),
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.cra_u = {
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.blkcipher = {
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.min_keysize = AES_MIN_KEY_SIZE,
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.max_keysize = AES_MAX_KEY_SIZE,
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.setkey = aes_set_key,
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.encrypt = ecb_encrypt,
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.decrypt = ecb_decrypt,
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},
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},
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};
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static int cbc_encrypt(struct blkcipher_desc *desc,
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struct scatterlist *dst, struct scatterlist *src,
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unsigned int nbytes)
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{
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struct crypto_aes_ctx *ctx = aes_ctx(crypto_blkcipher_ctx(desc->tfm));
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struct blkcipher_walk walk;
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int err;
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blkcipher_walk_init(&walk, dst, src, nbytes);
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err = blkcipher_walk_virt(desc, &walk);
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desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
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kernel_fpu_begin();
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while ((nbytes = walk.nbytes)) {
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aesni_cbc_enc(ctx, walk.dst.virt.addr, walk.src.virt.addr,
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nbytes & AES_BLOCK_MASK, walk.iv);
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nbytes &= AES_BLOCK_SIZE - 1;
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err = blkcipher_walk_done(desc, &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 cbc_decrypt(struct blkcipher_desc *desc,
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struct scatterlist *dst, struct scatterlist *src,
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unsigned int nbytes)
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{
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struct crypto_aes_ctx *ctx = aes_ctx(crypto_blkcipher_ctx(desc->tfm));
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struct blkcipher_walk walk;
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int err;
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blkcipher_walk_init(&walk, dst, src, nbytes);
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err = blkcipher_walk_virt(desc, &walk);
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desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
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kernel_fpu_begin();
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while ((nbytes = walk.nbytes)) {
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aesni_cbc_dec(ctx, walk.dst.virt.addr, walk.src.virt.addr,
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nbytes & AES_BLOCK_MASK, walk.iv);
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nbytes &= AES_BLOCK_SIZE - 1;
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err = blkcipher_walk_done(desc, &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 struct crypto_alg blk_cbc_alg = {
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.cra_name = "__cbc-aes-aesni",
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.cra_driver_name = "__driver-cbc-aes-aesni",
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.cra_priority = 0,
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.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
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.cra_blocksize = AES_BLOCK_SIZE,
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.cra_ctxsize = sizeof(struct crypto_aes_ctx)+AESNI_ALIGN-1,
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.cra_alignmask = 0,
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.cra_type = &crypto_blkcipher_type,
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.cra_module = THIS_MODULE,
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.cra_list = LIST_HEAD_INIT(blk_cbc_alg.cra_list),
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.cra_u = {
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.blkcipher = {
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.min_keysize = AES_MIN_KEY_SIZE,
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.max_keysize = AES_MAX_KEY_SIZE,
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.setkey = aes_set_key,
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.encrypt = cbc_encrypt,
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.decrypt = cbc_decrypt,
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},
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},
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};
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|
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#ifdef CONFIG_X86_64
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static void ctr_crypt_final(struct crypto_aes_ctx *ctx,
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struct blkcipher_walk *walk)
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{
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u8 *ctrblk = walk->iv;
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u8 keystream[AES_BLOCK_SIZE];
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u8 *src = walk->src.virt.addr;
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u8 *dst = walk->dst.virt.addr;
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unsigned int nbytes = walk->nbytes;
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aesni_enc(ctx, keystream, ctrblk);
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crypto_xor(keystream, src, nbytes);
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memcpy(dst, keystream, nbytes);
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crypto_inc(ctrblk, AES_BLOCK_SIZE);
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}
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static int ctr_crypt(struct blkcipher_desc *desc,
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struct scatterlist *dst, struct scatterlist *src,
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unsigned int nbytes)
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{
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struct crypto_aes_ctx *ctx = aes_ctx(crypto_blkcipher_ctx(desc->tfm));
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struct blkcipher_walk walk;
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int err;
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blkcipher_walk_init(&walk, dst, src, nbytes);
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err = blkcipher_walk_virt_block(desc, &walk, AES_BLOCK_SIZE);
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desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
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kernel_fpu_begin();
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while ((nbytes = walk.nbytes) >= AES_BLOCK_SIZE) {
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aesni_ctr_enc(ctx, walk.dst.virt.addr, walk.src.virt.addr,
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nbytes & AES_BLOCK_MASK, walk.iv);
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nbytes &= AES_BLOCK_SIZE - 1;
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err = blkcipher_walk_done(desc, &walk, nbytes);
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}
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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,
|
|
},
|
|
},
|
|
};
|
|
#endif
|
|
|
|
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,
|
|
},
|
|
},
|
|
};
|
|
|
|
#ifdef CONFIG_X86_64
|
|
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
|
|
#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
|
|
|
|
#ifdef CONFIG_X86_64
|
|
static int rfc4106_init(struct crypto_tfm *tfm)
|
|
{
|
|
struct cryptd_aead *cryptd_tfm;
|
|
struct aesni_rfc4106_gcm_ctx *ctx = (struct aesni_rfc4106_gcm_ctx *)
|
|
PTR_ALIGN((u8 *)crypto_tfm_ctx(tfm), AESNI_ALIGN);
|
|
struct crypto_aead *cryptd_child;
|
|
struct aesni_rfc4106_gcm_ctx *child_ctx;
|
|
cryptd_tfm = cryptd_alloc_aead("__driver-gcm-aes-aesni", 0, 0);
|
|
if (IS_ERR(cryptd_tfm))
|
|
return PTR_ERR(cryptd_tfm);
|
|
|
|
cryptd_child = cryptd_aead_child(cryptd_tfm);
|
|
child_ctx = aesni_rfc4106_gcm_ctx_get(cryptd_child);
|
|
memcpy(child_ctx, ctx, sizeof(*ctx));
|
|
ctx->cryptd_tfm = cryptd_tfm;
|
|
tfm->crt_aead.reqsize = sizeof(struct aead_request)
|
|
+ crypto_aead_reqsize(&cryptd_tfm->base);
|
|
return 0;
|
|
}
|
|
|
|
static void rfc4106_exit(struct crypto_tfm *tfm)
|
|
{
|
|
struct aesni_rfc4106_gcm_ctx *ctx =
|
|
(struct aesni_rfc4106_gcm_ctx *)
|
|
PTR_ALIGN((u8 *)crypto_tfm_ctx(tfm), AESNI_ALIGN);
|
|
if (!IS_ERR(ctx->cryptd_tfm))
|
|
cryptd_free_aead(ctx->cryptd_tfm);
|
|
return;
|
|
}
|
|
|
|
static void
|
|
rfc4106_set_hash_subkey_done(struct crypto_async_request *req, int err)
|
|
{
|
|
struct aesni_gcm_set_hash_subkey_result *result = req->data;
|
|
|
|
if (err == -EINPROGRESS)
|
|
return;
|
|
result->err = err;
|
|
complete(&result->completion);
|
|
}
|
|
|
|
static int
|
|
rfc4106_set_hash_subkey(u8 *hash_subkey, const u8 *key, unsigned int key_len)
|
|
{
|
|
struct crypto_ablkcipher *ctr_tfm;
|
|
struct ablkcipher_request *req;
|
|
int ret = -EINVAL;
|
|
struct aesni_hash_subkey_req_data *req_data;
|
|
|
|
ctr_tfm = crypto_alloc_ablkcipher("ctr(aes)", 0, 0);
|
|
if (IS_ERR(ctr_tfm))
|
|
return PTR_ERR(ctr_tfm);
|
|
|
|
crypto_ablkcipher_clear_flags(ctr_tfm, ~0);
|
|
|
|
ret = crypto_ablkcipher_setkey(ctr_tfm, key, key_len);
|
|
if (ret)
|
|
goto out_free_ablkcipher;
|
|
|
|
ret = -ENOMEM;
|
|
req = ablkcipher_request_alloc(ctr_tfm, GFP_KERNEL);
|
|
if (!req)
|
|
goto out_free_ablkcipher;
|
|
|
|
req_data = kmalloc(sizeof(*req_data), GFP_KERNEL);
|
|
if (!req_data)
|
|
goto out_free_request;
|
|
|
|
memset(req_data->iv, 0, sizeof(req_data->iv));
|
|
|
|
/* 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);
|
|
|
|
init_completion(&req_data->result.completion);
|
|
sg_init_one(&req_data->sg, hash_subkey, RFC4106_HASH_SUBKEY_SIZE);
|
|
ablkcipher_request_set_tfm(req, ctr_tfm);
|
|
ablkcipher_request_set_callback(req, CRYPTO_TFM_REQ_MAY_SLEEP |
|
|
CRYPTO_TFM_REQ_MAY_BACKLOG,
|
|
rfc4106_set_hash_subkey_done,
|
|
&req_data->result);
|
|
|
|
ablkcipher_request_set_crypt(req, &req_data->sg,
|
|
&req_data->sg, RFC4106_HASH_SUBKEY_SIZE, req_data->iv);
|
|
|
|
ret = crypto_ablkcipher_encrypt(req);
|
|
if (ret == -EINPROGRESS || ret == -EBUSY) {
|
|
ret = wait_for_completion_interruptible
|
|
(&req_data->result.completion);
|
|
if (!ret)
|
|
ret = req_data->result.err;
|
|
}
|
|
kfree(req_data);
|
|
out_free_request:
|
|
ablkcipher_request_free(req);
|
|
out_free_ablkcipher:
|
|
crypto_free_ablkcipher(ctr_tfm);
|
|
return ret;
|
|
}
|
|
|
|
static int rfc4106_set_key(struct crypto_aead *parent, const u8 *key,
|
|
unsigned int key_len)
|
|
{
|
|
int ret = 0;
|
|
struct crypto_tfm *tfm = crypto_aead_tfm(parent);
|
|
struct aesni_rfc4106_gcm_ctx *ctx = aesni_rfc4106_gcm_ctx_get(parent);
|
|
struct crypto_aead *cryptd_child = cryptd_aead_child(ctx->cryptd_tfm);
|
|
struct aesni_rfc4106_gcm_ctx *child_ctx =
|
|
aesni_rfc4106_gcm_ctx_get(cryptd_child);
|
|
u8 *new_key_mem = NULL;
|
|
|
|
if (key_len < 4) {
|
|
crypto_tfm_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
|
|
return -EINVAL;
|
|
}
|
|
/*Account for 4 byte nonce at the end.*/
|
|
key_len -= 4;
|
|
if (key_len != AES_KEYSIZE_128) {
|
|
crypto_tfm_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
|
|
return -EINVAL;
|
|
}
|
|
|
|
memcpy(ctx->nonce, key + key_len, sizeof(ctx->nonce));
|
|
/*This must be on a 16 byte boundary!*/
|
|
if ((unsigned long)(&(ctx->aes_key_expanded.key_enc[0])) % AESNI_ALIGN)
|
|
return -EINVAL;
|
|
|
|
if ((unsigned long)key % AESNI_ALIGN) {
|
|
/*key is not aligned: use an auxuliar aligned pointer*/
|
|
new_key_mem = kmalloc(key_len+AESNI_ALIGN, GFP_KERNEL);
|
|
if (!new_key_mem)
|
|
return -ENOMEM;
|
|
|
|
new_key_mem = PTR_ALIGN(new_key_mem, AESNI_ALIGN);
|
|
memcpy(new_key_mem, key, key_len);
|
|
key = new_key_mem;
|
|
}
|
|
|
|
if (!irq_fpu_usable())
|
|
ret = crypto_aes_expand_key(&(ctx->aes_key_expanded),
|
|
key, key_len);
|
|
else {
|
|
kernel_fpu_begin();
|
|
ret = aesni_set_key(&(ctx->aes_key_expanded), key, key_len);
|
|
kernel_fpu_end();
|
|
}
|
|
/*This must be on a 16 byte boundary!*/
|
|
if ((unsigned long)(&(ctx->hash_subkey[0])) % AESNI_ALIGN) {
|
|
ret = -EINVAL;
|
|
goto exit;
|
|
}
|
|
ret = rfc4106_set_hash_subkey(ctx->hash_subkey, key, key_len);
|
|
memcpy(child_ctx, ctx, sizeof(*ctx));
|
|
exit:
|
|
kfree(new_key_mem);
|
|
return ret;
|
|
}
|
|
|
|
/* 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 aesni_rfc4106_gcm_ctx *ctx = aesni_rfc4106_gcm_ctx_get(parent);
|
|
struct crypto_aead *cryptd_child = cryptd_aead_child(ctx->cryptd_tfm);
|
|
|
|
switch (authsize) {
|
|
case 8:
|
|
case 12:
|
|
case 16:
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
crypto_aead_crt(parent)->authsize = authsize;
|
|
crypto_aead_crt(cryptd_child)->authsize = authsize;
|
|
return 0;
|
|
}
|
|
|
|
static int rfc4106_encrypt(struct aead_request *req)
|
|
{
|
|
int ret;
|
|
struct crypto_aead *tfm = crypto_aead_reqtfm(req);
|
|
struct aesni_rfc4106_gcm_ctx *ctx = aesni_rfc4106_gcm_ctx_get(tfm);
|
|
|
|
if (!irq_fpu_usable()) {
|
|
struct aead_request *cryptd_req =
|
|
(struct aead_request *) aead_request_ctx(req);
|
|
memcpy(cryptd_req, req, sizeof(*req));
|
|
aead_request_set_tfm(cryptd_req, &ctx->cryptd_tfm->base);
|
|
return crypto_aead_encrypt(cryptd_req);
|
|
} else {
|
|
struct crypto_aead *cryptd_child = cryptd_aead_child(ctx->cryptd_tfm);
|
|
kernel_fpu_begin();
|
|
ret = cryptd_child->base.crt_aead.encrypt(req);
|
|
kernel_fpu_end();
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
static int rfc4106_decrypt(struct aead_request *req)
|
|
{
|
|
int ret;
|
|
struct crypto_aead *tfm = crypto_aead_reqtfm(req);
|
|
struct aesni_rfc4106_gcm_ctx *ctx = aesni_rfc4106_gcm_ctx_get(tfm);
|
|
|
|
if (!irq_fpu_usable()) {
|
|
struct aead_request *cryptd_req =
|
|
(struct aead_request *) aead_request_ctx(req);
|
|
memcpy(cryptd_req, req, sizeof(*req));
|
|
aead_request_set_tfm(cryptd_req, &ctx->cryptd_tfm->base);
|
|
return crypto_aead_decrypt(cryptd_req);
|
|
} else {
|
|
struct crypto_aead *cryptd_child = cryptd_aead_child(ctx->cryptd_tfm);
|
|
kernel_fpu_begin();
|
|
ret = cryptd_child->base.crt_aead.decrypt(req);
|
|
kernel_fpu_end();
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
static struct crypto_alg rfc4106_alg = {
|
|
.cra_name = "rfc4106(gcm(aes))",
|
|
.cra_driver_name = "rfc4106-gcm-aesni",
|
|
.cra_priority = 400,
|
|
.cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC,
|
|
.cra_blocksize = 1,
|
|
.cra_ctxsize = sizeof(struct aesni_rfc4106_gcm_ctx) + AESNI_ALIGN,
|
|
.cra_alignmask = 0,
|
|
.cra_type = &crypto_nivaead_type,
|
|
.cra_module = THIS_MODULE,
|
|
.cra_list = LIST_HEAD_INIT(rfc4106_alg.cra_list),
|
|
.cra_init = rfc4106_init,
|
|
.cra_exit = rfc4106_exit,
|
|
.cra_u = {
|
|
.aead = {
|
|
.setkey = rfc4106_set_key,
|
|
.setauthsize = rfc4106_set_authsize,
|
|
.encrypt = rfc4106_encrypt,
|
|
.decrypt = rfc4106_decrypt,
|
|
.geniv = "seqiv",
|
|
.ivsize = 8,
|
|
.maxauthsize = 16,
|
|
},
|
|
},
|
|
};
|
|
|
|
static int __driver_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_tab[16+AESNI_ALIGN];
|
|
u8* iv = (u8 *) PTR_ALIGN((u8 *)iv_tab, AESNI_ALIGN);
|
|
struct scatter_walk src_sg_walk;
|
|
struct scatter_walk assoc_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 8 or 12 bytes */
|
|
if (unlikely(req->assoclen != 8 && req->assoclen != 12))
|
|
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)) && (sg_is_last(req->assoc))) {
|
|
one_entry_in_sg = 1;
|
|
scatterwalk_start(&src_sg_walk, req->src);
|
|
scatterwalk_start(&assoc_sg_walk, req->assoc);
|
|
src = scatterwalk_map(&src_sg_walk, 0);
|
|
assoc = scatterwalk_map(&assoc_sg_walk, 0);
|
|
dst = src;
|
|
if (unlikely(req->src != req->dst)) {
|
|
scatterwalk_start(&dst_sg_walk, req->dst);
|
|
dst = scatterwalk_map(&dst_sg_walk, 0);
|
|
}
|
|
|
|
} else {
|
|
/* Allocate memory for src, dst, assoc */
|
|
src = kmalloc(req->cryptlen + auth_tag_len + req->assoclen,
|
|
GFP_ATOMIC);
|
|
if (unlikely(!src))
|
|
return -ENOMEM;
|
|
assoc = (src + req->cryptlen + auth_tag_len);
|
|
scatterwalk_map_and_copy(src, req->src, 0, req->cryptlen, 0);
|
|
scatterwalk_map_and_copy(assoc, req->assoc, 0,
|
|
req->assoclen, 0);
|
|
dst = src;
|
|
}
|
|
|
|
aesni_gcm_enc(aes_ctx, dst, src, (unsigned long)req->cryptlen, iv,
|
|
ctx->hash_subkey, assoc, (unsigned long)req->assoclen, dst
|
|
+ ((unsigned long)req->cryptlen), auth_tag_len);
|
|
|
|
/* 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, 0);
|
|
scatterwalk_done(&dst_sg_walk, 0, 0);
|
|
}
|
|
scatterwalk_unmap(src, 0);
|
|
scatterwalk_unmap(assoc, 0);
|
|
scatterwalk_done(&src_sg_walk, 0, 0);
|
|
scatterwalk_done(&assoc_sg_walk, 0, 0);
|
|
} else {
|
|
scatterwalk_map_and_copy(dst, req->dst, 0,
|
|
req->cryptlen + auth_tag_len, 1);
|
|
kfree(src);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int __driver_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_and_authTag[32+AESNI_ALIGN];
|
|
u8 *iv = (u8 *) PTR_ALIGN((u8 *)iv_and_authTag, AESNI_ALIGN);
|
|
u8 *authTag = iv + 16;
|
|
struct scatter_walk src_sg_walk;
|
|
struct scatter_walk assoc_sg_walk;
|
|
struct scatter_walk dst_sg_walk;
|
|
unsigned int i;
|
|
|
|
if (unlikely((req->cryptlen < auth_tag_len) ||
|
|
(req->assoclen != 8 && req->assoclen != 12)))
|
|
return -EINVAL;
|
|
/* Assuming we are supporting rfc4106 64-bit extended */
|
|
/* sequence numbers We need to have the AAD length */
|
|
/* equal to 8 or 12 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)) && (sg_is_last(req->assoc))) {
|
|
one_entry_in_sg = 1;
|
|
scatterwalk_start(&src_sg_walk, req->src);
|
|
scatterwalk_start(&assoc_sg_walk, req->assoc);
|
|
src = scatterwalk_map(&src_sg_walk, 0);
|
|
assoc = scatterwalk_map(&assoc_sg_walk, 0);
|
|
dst = src;
|
|
if (unlikely(req->src != req->dst)) {
|
|
scatterwalk_start(&dst_sg_walk, req->dst);
|
|
dst = scatterwalk_map(&dst_sg_walk, 0);
|
|
}
|
|
|
|
} else {
|
|
/* Allocate memory for src, dst, assoc */
|
|
src = kmalloc(req->cryptlen + req->assoclen, GFP_ATOMIC);
|
|
if (!src)
|
|
return -ENOMEM;
|
|
assoc = (src + req->cryptlen + auth_tag_len);
|
|
scatterwalk_map_and_copy(src, req->src, 0, req->cryptlen, 0);
|
|
scatterwalk_map_and_copy(assoc, req->assoc, 0,
|
|
req->assoclen, 0);
|
|
dst = src;
|
|
}
|
|
|
|
aesni_gcm_dec(aes_ctx, dst, src, tempCipherLen, iv,
|
|
ctx->hash_subkey, assoc, (unsigned long)req->assoclen,
|
|
authTag, auth_tag_len);
|
|
|
|
/* Compare generated tag with passed in tag. */
|
|
retval = memcmp(src + tempCipherLen, authTag, auth_tag_len) ?
|
|
-EBADMSG : 0;
|
|
|
|
if (one_entry_in_sg) {
|
|
if (unlikely(req->src != req->dst)) {
|
|
scatterwalk_unmap(dst, 0);
|
|
scatterwalk_done(&dst_sg_walk, 0, 0);
|
|
}
|
|
scatterwalk_unmap(src, 0);
|
|
scatterwalk_unmap(assoc, 0);
|
|
scatterwalk_done(&src_sg_walk, 0, 0);
|
|
scatterwalk_done(&assoc_sg_walk, 0, 0);
|
|
} else {
|
|
scatterwalk_map_and_copy(dst, req->dst, 0, req->cryptlen, 1);
|
|
kfree(src);
|
|
}
|
|
return retval;
|
|
}
|
|
|
|
static struct crypto_alg __rfc4106_alg = {
|
|
.cra_name = "__gcm-aes-aesni",
|
|
.cra_driver_name = "__driver-gcm-aes-aesni",
|
|
.cra_priority = 0,
|
|
.cra_flags = CRYPTO_ALG_TYPE_AEAD,
|
|
.cra_blocksize = 1,
|
|
.cra_ctxsize = sizeof(struct aesni_rfc4106_gcm_ctx) + AESNI_ALIGN,
|
|
.cra_alignmask = 0,
|
|
.cra_type = &crypto_aead_type,
|
|
.cra_module = THIS_MODULE,
|
|
.cra_list = LIST_HEAD_INIT(__rfc4106_alg.cra_list),
|
|
.cra_u = {
|
|
.aead = {
|
|
.encrypt = __driver_rfc4106_encrypt,
|
|
.decrypt = __driver_rfc4106_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_fpu_init()))
|
|
goto fpu_err;
|
|
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(&ablk_ecb_alg)))
|
|
goto ablk_ecb_err;
|
|
if ((err = crypto_register_alg(&ablk_cbc_alg)))
|
|
goto ablk_cbc_err;
|
|
#ifdef CONFIG_X86_64
|
|
if ((err = crypto_register_alg(&blk_ctr_alg)))
|
|
goto blk_ctr_err;
|
|
if ((err = crypto_register_alg(&ablk_ctr_alg)))
|
|
goto ablk_ctr_err;
|
|
if ((err = crypto_register_alg(&__rfc4106_alg)))
|
|
goto __aead_gcm_err;
|
|
if ((err = crypto_register_alg(&rfc4106_alg)))
|
|
goto aead_gcm_err;
|
|
#ifdef HAS_CTR
|
|
if ((err = crypto_register_alg(&ablk_rfc3686_ctr_alg)))
|
|
goto ablk_rfc3686_ctr_err;
|
|
#endif
|
|
#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 CONFIG_X86_64
|
|
#ifdef HAS_CTR
|
|
crypto_unregister_alg(&ablk_rfc3686_ctr_alg);
|
|
ablk_rfc3686_ctr_err:
|
|
#endif
|
|
crypto_unregister_alg(&rfc4106_alg);
|
|
aead_gcm_err:
|
|
crypto_unregister_alg(&__rfc4106_alg);
|
|
__aead_gcm_err:
|
|
crypto_unregister_alg(&ablk_ctr_alg);
|
|
ablk_ctr_err:
|
|
crypto_unregister_alg(&blk_ctr_alg);
|
|
blk_ctr_err:
|
|
#endif
|
|
crypto_unregister_alg(&ablk_cbc_alg);
|
|
ablk_cbc_err:
|
|
crypto_unregister_alg(&ablk_ecb_alg);
|
|
ablk_ecb_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:
|
|
fpu_err:
|
|
return err;
|
|
}
|
|
|
|
static void __exit aesni_exit(void)
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{
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#ifdef HAS_XTS
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crypto_unregister_alg(&ablk_xts_alg);
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#endif
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#ifdef HAS_PCBC
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crypto_unregister_alg(&ablk_pcbc_alg);
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#endif
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#ifdef HAS_LRW
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crypto_unregister_alg(&ablk_lrw_alg);
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#endif
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#ifdef CONFIG_X86_64
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#ifdef HAS_CTR
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crypto_unregister_alg(&ablk_rfc3686_ctr_alg);
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#endif
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crypto_unregister_alg(&rfc4106_alg);
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crypto_unregister_alg(&__rfc4106_alg);
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crypto_unregister_alg(&ablk_ctr_alg);
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crypto_unregister_alg(&blk_ctr_alg);
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#endif
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crypto_unregister_alg(&ablk_cbc_alg);
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crypto_unregister_alg(&ablk_ecb_alg);
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crypto_unregister_alg(&blk_cbc_alg);
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crypto_unregister_alg(&blk_ecb_alg);
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crypto_unregister_alg(&__aesni_alg);
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crypto_unregister_alg(&aesni_alg);
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crypto_fpu_exit();
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}
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module_init(aesni_init);
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module_exit(aesni_exit);
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MODULE_DESCRIPTION("Rijndael (AES) Cipher Algorithm, Intel AES-NI instructions optimized");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("aes");
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