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1202 lines
33 KiB
1202 lines
33 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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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 <[email protected]> |
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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 <[email protected]> |
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* Gabriele Paoloni <[email protected]> |
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* Tadeusz Struk ([email protected]) |
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* Aidan O'Mahony ([email protected]) |
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* Copyright (c) 2010, Intel Corporation. |
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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/ctr.h> |
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#include <crypto/b128ops.h> |
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#include <crypto/gcm.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/simd.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/jump_label.h> |
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#include <linux/workqueue.h> |
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#include <linux/spinlock.h> |
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#include <linux/static_call.h> |
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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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|
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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 generic_gcmaes_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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}; |
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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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#define GCM_BLOCK_LEN 16 |
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struct gcm_context_data { |
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/* init, update and finalize context data */ |
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u8 aad_hash[GCM_BLOCK_LEN]; |
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u64 aad_length; |
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u64 in_length; |
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u8 partial_block_enc_key[GCM_BLOCK_LEN]; |
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u8 orig_IV[GCM_BLOCK_LEN]; |
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u8 current_counter[GCM_BLOCK_LEN]; |
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u64 partial_block_len; |
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u64 unused; |
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u8 hash_keys[GCM_BLOCK_LEN * 16]; |
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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(const void *ctx, u8 *out, const u8 *in); |
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asmlinkage void aesni_dec(const void *ctx, u8 *out, 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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asmlinkage void aesni_cts_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_cts_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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#define AVX_GEN2_OPTSIZE 640 |
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#define AVX_GEN4_OPTSIZE 4096 |
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asmlinkage void aesni_xts_encrypt(const 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_decrypt(const struct crypto_aes_ctx *ctx, u8 *out, |
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const u8 *in, unsigned int len, u8 *iv); |
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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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DEFINE_STATIC_CALL(aesni_ctr_enc_tfm, aesni_ctr_enc); |
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|
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/* Scatter / Gather routines, with args similar to above */ |
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asmlinkage void aesni_gcm_init(void *ctx, |
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struct gcm_context_data *gdata, |
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u8 *iv, |
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u8 *hash_subkey, const u8 *aad, |
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unsigned long aad_len); |
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asmlinkage void aesni_gcm_enc_update(void *ctx, |
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struct gcm_context_data *gdata, u8 *out, |
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const u8 *in, unsigned long plaintext_len); |
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asmlinkage void aesni_gcm_dec_update(void *ctx, |
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struct gcm_context_data *gdata, u8 *out, |
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const u8 *in, |
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unsigned long ciphertext_len); |
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asmlinkage void aesni_gcm_finalize(void *ctx, |
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struct gcm_context_data *gdata, |
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u8 *auth_tag, unsigned long auth_tag_len); |
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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_init_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_init_avx_gen2(void *my_ctx_data, |
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struct gcm_context_data *gdata, |
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u8 *iv, |
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u8 *hash_subkey, |
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const u8 *aad, |
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unsigned long aad_len); |
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asmlinkage void aesni_gcm_enc_update_avx_gen2(void *ctx, |
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struct gcm_context_data *gdata, u8 *out, |
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const u8 *in, unsigned long plaintext_len); |
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asmlinkage void aesni_gcm_dec_update_avx_gen2(void *ctx, |
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struct gcm_context_data *gdata, u8 *out, |
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const u8 *in, |
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unsigned long ciphertext_len); |
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asmlinkage void aesni_gcm_finalize_avx_gen2(void *ctx, |
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struct gcm_context_data *gdata, |
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u8 *auth_tag, unsigned long auth_tag_len); |
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/* |
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* asmlinkage void aesni_gcm_init_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_init_avx_gen4(void *my_ctx_data, |
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struct gcm_context_data *gdata, |
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u8 *iv, |
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u8 *hash_subkey, |
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const u8 *aad, |
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unsigned long aad_len); |
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asmlinkage void aesni_gcm_enc_update_avx_gen4(void *ctx, |
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struct gcm_context_data *gdata, u8 *out, |
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const u8 *in, unsigned long plaintext_len); |
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asmlinkage void aesni_gcm_dec_update_avx_gen4(void *ctx, |
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struct gcm_context_data *gdata, u8 *out, |
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const u8 *in, |
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unsigned long ciphertext_len); |
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asmlinkage void aesni_gcm_finalize_avx_gen4(void *ctx, |
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struct gcm_context_data *gdata, |
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u8 *auth_tag, unsigned long auth_tag_len); |
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static __ro_after_init DEFINE_STATIC_KEY_FALSE(gcm_use_avx); |
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static __ro_after_init DEFINE_STATIC_KEY_FALSE(gcm_use_avx2); |
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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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static inline struct |
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generic_gcmaes_ctx *generic_gcmaes_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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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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return -EINVAL; |
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if (!crypto_simd_usable()) |
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err = aes_expandkey(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 aesni_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 (!crypto_simd_usable()) { |
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aes_encrypt(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 aesni_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 (!crypto_simd_usable()) { |
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aes_decrypt(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 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, false); |
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while ((nbytes = walk.nbytes)) { |
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kernel_fpu_begin(); |
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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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kernel_fpu_end(); |
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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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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, false); |
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while ((nbytes = walk.nbytes)) { |
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kernel_fpu_begin(); |
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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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kernel_fpu_end(); |
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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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return err; |
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} |
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static int cbc_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, false); |
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while ((nbytes = walk.nbytes)) { |
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kernel_fpu_begin(); |
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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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kernel_fpu_end(); |
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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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return err; |
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} |
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static int cbc_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, false); |
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while ((nbytes = walk.nbytes)) { |
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kernel_fpu_begin(); |
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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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kernel_fpu_end(); |
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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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return err; |
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} |
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static int cts_cbc_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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int cbc_blocks = DIV_ROUND_UP(req->cryptlen, AES_BLOCK_SIZE) - 2; |
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struct scatterlist *src = req->src, *dst = req->dst; |
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struct scatterlist sg_src[2], sg_dst[2]; |
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struct skcipher_request subreq; |
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struct skcipher_walk walk; |
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int err; |
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skcipher_request_set_tfm(&subreq, tfm); |
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skcipher_request_set_callback(&subreq, skcipher_request_flags(req), |
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NULL, NULL); |
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if (req->cryptlen <= AES_BLOCK_SIZE) { |
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if (req->cryptlen < AES_BLOCK_SIZE) |
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return -EINVAL; |
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cbc_blocks = 1; |
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} |
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if (cbc_blocks > 0) { |
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skcipher_request_set_crypt(&subreq, req->src, req->dst, |
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cbc_blocks * AES_BLOCK_SIZE, |
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req->iv); |
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err = cbc_encrypt(&subreq); |
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if (err) |
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return err; |
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if (req->cryptlen == AES_BLOCK_SIZE) |
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return 0; |
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dst = src = scatterwalk_ffwd(sg_src, req->src, subreq.cryptlen); |
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if (req->dst != req->src) |
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dst = scatterwalk_ffwd(sg_dst, req->dst, |
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subreq.cryptlen); |
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} |
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/* handle ciphertext stealing */ |
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skcipher_request_set_crypt(&subreq, src, dst, |
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req->cryptlen - cbc_blocks * AES_BLOCK_SIZE, |
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req->iv); |
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err = skcipher_walk_virt(&walk, &subreq, false); |
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if (err) |
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return err; |
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kernel_fpu_begin(); |
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aesni_cts_cbc_enc(ctx, walk.dst.virt.addr, walk.src.virt.addr, |
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walk.nbytes, walk.iv); |
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kernel_fpu_end(); |
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return skcipher_walk_done(&walk, 0); |
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} |
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static int cts_cbc_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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int cbc_blocks = DIV_ROUND_UP(req->cryptlen, AES_BLOCK_SIZE) - 2; |
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struct scatterlist *src = req->src, *dst = req->dst; |
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struct scatterlist sg_src[2], sg_dst[2]; |
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struct skcipher_request subreq; |
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struct skcipher_walk walk; |
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int err; |
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skcipher_request_set_tfm(&subreq, tfm); |
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skcipher_request_set_callback(&subreq, skcipher_request_flags(req), |
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NULL, NULL); |
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if (req->cryptlen <= AES_BLOCK_SIZE) { |
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if (req->cryptlen < AES_BLOCK_SIZE) |
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return -EINVAL; |
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cbc_blocks = 1; |
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} |
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|
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if (cbc_blocks > 0) { |
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skcipher_request_set_crypt(&subreq, req->src, req->dst, |
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cbc_blocks * AES_BLOCK_SIZE, |
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req->iv); |
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|
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err = cbc_decrypt(&subreq); |
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if (err) |
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return err; |
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|
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if (req->cryptlen == AES_BLOCK_SIZE) |
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return 0; |
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|
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dst = src = scatterwalk_ffwd(sg_src, req->src, subreq.cryptlen); |
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if (req->dst != req->src) |
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dst = scatterwalk_ffwd(sg_dst, req->dst, |
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subreq.cryptlen); |
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} |
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|
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/* handle ciphertext stealing */ |
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skcipher_request_set_crypt(&subreq, src, dst, |
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req->cryptlen - cbc_blocks * AES_BLOCK_SIZE, |
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req->iv); |
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|
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err = skcipher_walk_virt(&walk, &subreq, false); |
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if (err) |
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return err; |
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|
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kernel_fpu_begin(); |
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aesni_cts_cbc_dec(ctx, walk.dst.virt.addr, walk.src.virt.addr, |
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walk.nbytes, walk.iv); |
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kernel_fpu_end(); |
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|
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return skcipher_walk_done(&walk, 0); |
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} |
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#ifdef CONFIG_X86_64 |
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static void aesni_ctr_enc_avx_tfm(struct crypto_aes_ctx *ctx, u8 *out, |
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const u8 *in, unsigned int len, u8 *iv) |
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{ |
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/* |
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* based on key length, override with the by8 version |
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* of ctr mode encryption/decryption for improved performance |
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* aes_set_key_common() ensures that key length is one of |
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* {128,192,256} |
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*/ |
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if (ctx->key_length == AES_KEYSIZE_128) |
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aes_ctr_enc_128_avx_by8(in, iv, (void *)ctx, out, len); |
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else if (ctx->key_length == AES_KEYSIZE_192) |
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aes_ctr_enc_192_avx_by8(in, iv, (void *)ctx, out, len); |
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else |
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aes_ctr_enc_256_avx_by8(in, iv, (void *)ctx, out, len); |
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} |
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|
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static int ctr_crypt(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)); |
|
u8 keystream[AES_BLOCK_SIZE]; |
|
struct skcipher_walk walk; |
|
unsigned int nbytes; |
|
int err; |
|
|
|
err = skcipher_walk_virt(&walk, req, false); |
|
|
|
while ((nbytes = walk.nbytes) > 0) { |
|
kernel_fpu_begin(); |
|
if (nbytes & AES_BLOCK_MASK) |
|
static_call(aesni_ctr_enc_tfm)(ctx, walk.dst.virt.addr, |
|
walk.src.virt.addr, |
|
nbytes & AES_BLOCK_MASK, |
|
walk.iv); |
|
nbytes &= ~AES_BLOCK_MASK; |
|
|
|
if (walk.nbytes == walk.total && nbytes > 0) { |
|
aesni_enc(ctx, keystream, walk.iv); |
|
crypto_xor_cpy(walk.dst.virt.addr + walk.nbytes - nbytes, |
|
walk.src.virt.addr + walk.nbytes - nbytes, |
|
keystream, nbytes); |
|
crypto_inc(walk.iv, AES_BLOCK_SIZE); |
|
nbytes = 0; |
|
} |
|
kernel_fpu_end(); |
|
err = skcipher_walk_done(&walk, nbytes); |
|
} |
|
return err; |
|
} |
|
|
|
static int |
|
rfc4106_set_hash_subkey(u8 *hash_subkey, const u8 *key, unsigned int key_len) |
|
{ |
|
struct crypto_aes_ctx ctx; |
|
int ret; |
|
|
|
ret = aes_expandkey(&ctx, key, key_len); |
|
if (ret) |
|
return ret; |
|
|
|
/* 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); |
|
|
|
aes_encrypt(&ctx, hash_subkey, hash_subkey); |
|
|
|
memzero_explicit(&ctx, sizeof(ctx)); |
|
return 0; |
|
} |
|
|
|
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) |
|
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); |
|
} |
|
|
|
/* This is the Integrity Check Value (aka the authentication tag) length and can |
|
* be 8, 12 or 16 bytes long. */ |
|
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; |
|
} |
|
|
|
static int generic_gcmaes_set_authsize(struct crypto_aead *tfm, |
|
unsigned int authsize) |
|
{ |
|
switch (authsize) { |
|
case 4: |
|
case 8: |
|
case 12: |
|
case 13: |
|
case 14: |
|
case 15: |
|
case 16: |
|
break; |
|
default: |
|
return -EINVAL; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int gcmaes_crypt_by_sg(bool enc, struct aead_request *req, |
|
unsigned int assoclen, u8 *hash_subkey, |
|
u8 *iv, void *aes_ctx, u8 *auth_tag, |
|
unsigned long auth_tag_len) |
|
{ |
|
u8 databuf[sizeof(struct gcm_context_data) + (AESNI_ALIGN - 8)] __aligned(8); |
|
struct gcm_context_data *data = PTR_ALIGN((void *)databuf, AESNI_ALIGN); |
|
unsigned long left = req->cryptlen; |
|
struct scatter_walk assoc_sg_walk; |
|
struct skcipher_walk walk; |
|
bool do_avx, do_avx2; |
|
u8 *assocmem = NULL; |
|
u8 *assoc; |
|
int err; |
|
|
|
if (!enc) |
|
left -= auth_tag_len; |
|
|
|
do_avx = (left >= AVX_GEN2_OPTSIZE); |
|
do_avx2 = (left >= AVX_GEN4_OPTSIZE); |
|
|
|
/* Linearize assoc, if not already linear */ |
|
if (req->src->length >= assoclen && req->src->length) { |
|
scatterwalk_start(&assoc_sg_walk, req->src); |
|
assoc = scatterwalk_map(&assoc_sg_walk); |
|
} else { |
|
gfp_t flags = (req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP) ? |
|
GFP_KERNEL : GFP_ATOMIC; |
|
|
|
/* assoc can be any length, so must be on heap */ |
|
assocmem = kmalloc(assoclen, flags); |
|
if (unlikely(!assocmem)) |
|
return -ENOMEM; |
|
assoc = assocmem; |
|
|
|
scatterwalk_map_and_copy(assoc, req->src, 0, assoclen, 0); |
|
} |
|
|
|
kernel_fpu_begin(); |
|
if (static_branch_likely(&gcm_use_avx2) && do_avx2) |
|
aesni_gcm_init_avx_gen4(aes_ctx, data, iv, hash_subkey, assoc, |
|
assoclen); |
|
else if (static_branch_likely(&gcm_use_avx) && do_avx) |
|
aesni_gcm_init_avx_gen2(aes_ctx, data, iv, hash_subkey, assoc, |
|
assoclen); |
|
else |
|
aesni_gcm_init(aes_ctx, data, iv, hash_subkey, assoc, assoclen); |
|
kernel_fpu_end(); |
|
|
|
if (!assocmem) |
|
scatterwalk_unmap(assoc); |
|
else |
|
kfree(assocmem); |
|
|
|
err = enc ? skcipher_walk_aead_encrypt(&walk, req, false) |
|
: skcipher_walk_aead_decrypt(&walk, req, false); |
|
|
|
while (walk.nbytes > 0) { |
|
kernel_fpu_begin(); |
|
if (static_branch_likely(&gcm_use_avx2) && do_avx2) { |
|
if (enc) |
|
aesni_gcm_enc_update_avx_gen4(aes_ctx, data, |
|
walk.dst.virt.addr, |
|
walk.src.virt.addr, |
|
walk.nbytes); |
|
else |
|
aesni_gcm_dec_update_avx_gen4(aes_ctx, data, |
|
walk.dst.virt.addr, |
|
walk.src.virt.addr, |
|
walk.nbytes); |
|
} else if (static_branch_likely(&gcm_use_avx) && do_avx) { |
|
if (enc) |
|
aesni_gcm_enc_update_avx_gen2(aes_ctx, data, |
|
walk.dst.virt.addr, |
|
walk.src.virt.addr, |
|
walk.nbytes); |
|
else |
|
aesni_gcm_dec_update_avx_gen2(aes_ctx, data, |
|
walk.dst.virt.addr, |
|
walk.src.virt.addr, |
|
walk.nbytes); |
|
} else if (enc) { |
|
aesni_gcm_enc_update(aes_ctx, data, walk.dst.virt.addr, |
|
walk.src.virt.addr, walk.nbytes); |
|
} else { |
|
aesni_gcm_dec_update(aes_ctx, data, walk.dst.virt.addr, |
|
walk.src.virt.addr, walk.nbytes); |
|
} |
|
kernel_fpu_end(); |
|
|
|
err = skcipher_walk_done(&walk, 0); |
|
} |
|
|
|
if (err) |
|
return err; |
|
|
|
kernel_fpu_begin(); |
|
if (static_branch_likely(&gcm_use_avx2) && do_avx2) |
|
aesni_gcm_finalize_avx_gen4(aes_ctx, data, auth_tag, |
|
auth_tag_len); |
|
else if (static_branch_likely(&gcm_use_avx) && do_avx) |
|
aesni_gcm_finalize_avx_gen2(aes_ctx, data, auth_tag, |
|
auth_tag_len); |
|
else |
|
aesni_gcm_finalize(aes_ctx, data, auth_tag, auth_tag_len); |
|
kernel_fpu_end(); |
|
|
|
return 0; |
|
} |
|
|
|
static int gcmaes_encrypt(struct aead_request *req, unsigned int assoclen, |
|
u8 *hash_subkey, u8 *iv, void *aes_ctx) |
|
{ |
|
struct crypto_aead *tfm = crypto_aead_reqtfm(req); |
|
unsigned long auth_tag_len = crypto_aead_authsize(tfm); |
|
u8 auth_tag[16]; |
|
int err; |
|
|
|
err = gcmaes_crypt_by_sg(true, req, assoclen, hash_subkey, iv, aes_ctx, |
|
auth_tag, auth_tag_len); |
|
if (err) |
|
return err; |
|
|
|
scatterwalk_map_and_copy(auth_tag, req->dst, |
|
req->assoclen + req->cryptlen, |
|
auth_tag_len, 1); |
|
return 0; |
|
} |
|
|
|
static int gcmaes_decrypt(struct aead_request *req, unsigned int assoclen, |
|
u8 *hash_subkey, u8 *iv, void *aes_ctx) |
|
{ |
|
struct crypto_aead *tfm = crypto_aead_reqtfm(req); |
|
unsigned long auth_tag_len = crypto_aead_authsize(tfm); |
|
u8 auth_tag_msg[16]; |
|
u8 auth_tag[16]; |
|
int err; |
|
|
|
err = gcmaes_crypt_by_sg(false, req, assoclen, hash_subkey, iv, aes_ctx, |
|
auth_tag, auth_tag_len); |
|
if (err) |
|
return err; |
|
|
|
/* Copy out original auth_tag */ |
|
scatterwalk_map_and_copy(auth_tag_msg, req->src, |
|
req->assoclen + req->cryptlen - auth_tag_len, |
|
auth_tag_len, 0); |
|
|
|
/* Compare generated tag with passed in tag. */ |
|
if (crypto_memneq(auth_tag_msg, auth_tag, auth_tag_len)) { |
|
memzero_explicit(auth_tag, sizeof(auth_tag)); |
|
return -EBADMSG; |
|
} |
|
return 0; |
|
} |
|
|
|
static int helper_rfc4106_encrypt(struct aead_request *req) |
|
{ |
|
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); |
|
u8 ivbuf[16 + (AESNI_ALIGN - 8)] __aligned(8); |
|
u8 *iv = PTR_ALIGN(&ivbuf[0], AESNI_ALIGN); |
|
unsigned int i; |
|
__be32 counter = cpu_to_be32(1); |
|
|
|
/* 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; |
|
|
|
return gcmaes_encrypt(req, req->assoclen - 8, ctx->hash_subkey, iv, |
|
aes_ctx); |
|
} |
|
|
|
static int helper_rfc4106_decrypt(struct aead_request *req) |
|
{ |
|
__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); |
|
u8 ivbuf[16 + (AESNI_ALIGN - 8)] __aligned(8); |
|
u8 *iv = PTR_ALIGN(&ivbuf[0], AESNI_ALIGN); |
|
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 */ |
|
|
|
/* 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; |
|
|
|
return gcmaes_decrypt(req, req->assoclen - 8, ctx->hash_subkey, iv, |
|
aes_ctx); |
|
} |
|
#endif |
|
|
|
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 int xts_crypt(struct skcipher_request *req, bool encrypt) |
|
{ |
|
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); |
|
struct aesni_xts_ctx *ctx = crypto_skcipher_ctx(tfm); |
|
int tail = req->cryptlen % AES_BLOCK_SIZE; |
|
struct skcipher_request subreq; |
|
struct skcipher_walk walk; |
|
int err; |
|
|
|
if (req->cryptlen < AES_BLOCK_SIZE) |
|
return -EINVAL; |
|
|
|
err = skcipher_walk_virt(&walk, req, false); |
|
|
|
if (unlikely(tail > 0 && walk.nbytes < walk.total)) { |
|
int blocks = DIV_ROUND_UP(req->cryptlen, AES_BLOCK_SIZE) - 2; |
|
|
|
skcipher_walk_abort(&walk); |
|
|
|
skcipher_request_set_tfm(&subreq, tfm); |
|
skcipher_request_set_callback(&subreq, |
|
skcipher_request_flags(req), |
|
NULL, NULL); |
|
skcipher_request_set_crypt(&subreq, req->src, req->dst, |
|
blocks * AES_BLOCK_SIZE, req->iv); |
|
req = &subreq; |
|
err = skcipher_walk_virt(&walk, req, false); |
|
} else { |
|
tail = 0; |
|
} |
|
|
|
kernel_fpu_begin(); |
|
|
|
/* calculate first value of T */ |
|
aesni_enc(aes_ctx(ctx->raw_tweak_ctx), walk.iv, walk.iv); |
|
|
|
while (walk.nbytes > 0) { |
|
int nbytes = walk.nbytes; |
|
|
|
if (nbytes < walk.total) |
|
nbytes &= ~(AES_BLOCK_SIZE - 1); |
|
|
|
if (encrypt) |
|
aesni_xts_encrypt(aes_ctx(ctx->raw_crypt_ctx), |
|
walk.dst.virt.addr, walk.src.virt.addr, |
|
nbytes, walk.iv); |
|
else |
|
aesni_xts_decrypt(aes_ctx(ctx->raw_crypt_ctx), |
|
walk.dst.virt.addr, walk.src.virt.addr, |
|
nbytes, walk.iv); |
|
kernel_fpu_end(); |
|
|
|
err = skcipher_walk_done(&walk, walk.nbytes - nbytes); |
|
|
|
if (walk.nbytes > 0) |
|
kernel_fpu_begin(); |
|
} |
|
|
|
if (unlikely(tail > 0 && !err)) { |
|
struct scatterlist sg_src[2], sg_dst[2]; |
|
struct scatterlist *src, *dst; |
|
|
|
dst = src = scatterwalk_ffwd(sg_src, req->src, req->cryptlen); |
|
if (req->dst != req->src) |
|
dst = scatterwalk_ffwd(sg_dst, req->dst, req->cryptlen); |
|
|
|
skcipher_request_set_crypt(req, src, dst, AES_BLOCK_SIZE + tail, |
|
req->iv); |
|
|
|
err = skcipher_walk_virt(&walk, &subreq, false); |
|
if (err) |
|
return err; |
|
|
|
kernel_fpu_begin(); |
|
if (encrypt) |
|
aesni_xts_encrypt(aes_ctx(ctx->raw_crypt_ctx), |
|
walk.dst.virt.addr, walk.src.virt.addr, |
|
walk.nbytes, walk.iv); |
|
else |
|
aesni_xts_decrypt(aes_ctx(ctx->raw_crypt_ctx), |
|
walk.dst.virt.addr, walk.src.virt.addr, |
|
walk.nbytes, walk.iv); |
|
kernel_fpu_end(); |
|
|
|
err = skcipher_walk_done(&walk, 0); |
|
} |
|
return err; |
|
} |
|
|
|
static int xts_encrypt(struct skcipher_request *req) |
|
{ |
|
return xts_crypt(req, true); |
|
} |
|
|
|
static int xts_decrypt(struct skcipher_request *req) |
|
{ |
|
return xts_crypt(req, false); |
|
} |
|
|
|
static struct crypto_alg aesni_cipher_alg = { |
|
.cra_name = "aes", |
|
.cra_driver_name = "aes-aesni", |
|
.cra_priority = 300, |
|
.cra_flags = CRYPTO_ALG_TYPE_CIPHER, |
|
.cra_blocksize = AES_BLOCK_SIZE, |
|
.cra_ctxsize = 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 = aesni_encrypt, |
|
.cia_decrypt = aesni_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, |
|
}, { |
|
.base = { |
|
.cra_name = "__cts(cbc(aes))", |
|
.cra_driver_name = "__cts-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, |
|
.walksize = 2 * AES_BLOCK_SIZE, |
|
.setkey = aesni_skcipher_setkey, |
|
.encrypt = cts_cbc_encrypt, |
|
.decrypt = cts_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, |
|
#endif |
|
}, { |
|
.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, |
|
.walksize = 2 * AES_BLOCK_SIZE, |
|
.setkey = xts_aesni_setkey, |
|
.encrypt = xts_encrypt, |
|
.decrypt = xts_decrypt, |
|
} |
|
}; |
|
|
|
static |
|
struct simd_skcipher_alg *aesni_simd_skciphers[ARRAY_SIZE(aesni_skciphers)]; |
|
|
|
#ifdef CONFIG_X86_64 |
|
static int generic_gcmaes_set_key(struct crypto_aead *aead, const u8 *key, |
|
unsigned int key_len) |
|
{ |
|
struct generic_gcmaes_ctx *ctx = generic_gcmaes_ctx_get(aead); |
|
|
|
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 generic_gcmaes_encrypt(struct aead_request *req) |
|
{ |
|
struct crypto_aead *tfm = crypto_aead_reqtfm(req); |
|
struct generic_gcmaes_ctx *ctx = generic_gcmaes_ctx_get(tfm); |
|
void *aes_ctx = &(ctx->aes_key_expanded); |
|
u8 ivbuf[16 + (AESNI_ALIGN - 8)] __aligned(8); |
|
u8 *iv = PTR_ALIGN(&ivbuf[0], AESNI_ALIGN); |
|
__be32 counter = cpu_to_be32(1); |
|
|
|
memcpy(iv, req->iv, 12); |
|
*((__be32 *)(iv+12)) = counter; |
|
|
|
return gcmaes_encrypt(req, req->assoclen, ctx->hash_subkey, iv, |
|
aes_ctx); |
|
} |
|
|
|
static int generic_gcmaes_decrypt(struct aead_request *req) |
|
{ |
|
__be32 counter = cpu_to_be32(1); |
|
struct crypto_aead *tfm = crypto_aead_reqtfm(req); |
|
struct generic_gcmaes_ctx *ctx = generic_gcmaes_ctx_get(tfm); |
|
void *aes_ctx = &(ctx->aes_key_expanded); |
|
u8 ivbuf[16 + (AESNI_ALIGN - 8)] __aligned(8); |
|
u8 *iv = PTR_ALIGN(&ivbuf[0], AESNI_ALIGN); |
|
|
|
memcpy(iv, req->iv, 12); |
|
*((__be32 *)(iv+12)) = counter; |
|
|
|
return gcmaes_decrypt(req, req->assoclen, ctx->hash_subkey, iv, |
|
aes_ctx); |
|
} |
|
|
|
static struct aead_alg aesni_aeads[] = { { |
|
.setkey = common_rfc4106_set_key, |
|
.setauthsize = common_rfc4106_set_authsize, |
|
.encrypt = helper_rfc4106_encrypt, |
|
.decrypt = helper_rfc4106_decrypt, |
|
.ivsize = GCM_RFC4106_IV_SIZE, |
|
.maxauthsize = 16, |
|
.base = { |
|
.cra_name = "__rfc4106(gcm(aes))", |
|
.cra_driver_name = "__rfc4106-gcm-aesni", |
|
.cra_priority = 400, |
|
.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, |
|
}, |
|
}, { |
|
.setkey = generic_gcmaes_set_key, |
|
.setauthsize = generic_gcmaes_set_authsize, |
|
.encrypt = generic_gcmaes_encrypt, |
|
.decrypt = generic_gcmaes_decrypt, |
|
.ivsize = GCM_AES_IV_SIZE, |
|
.maxauthsize = 16, |
|
.base = { |
|
.cra_name = "__gcm(aes)", |
|
.cra_driver_name = "__generic-gcm-aesni", |
|
.cra_priority = 400, |
|
.cra_flags = CRYPTO_ALG_INTERNAL, |
|
.cra_blocksize = 1, |
|
.cra_ctxsize = sizeof(struct generic_gcmaes_ctx), |
|
.cra_alignmask = AESNI_ALIGN - 1, |
|
.cra_module = THIS_MODULE, |
|
}, |
|
} }; |
|
#else |
|
static struct aead_alg aesni_aeads[0]; |
|
#endif |
|
|
|
static struct simd_aead_alg *aesni_simd_aeads[ARRAY_SIZE(aesni_aeads)]; |
|
|
|
static const struct x86_cpu_id aesni_cpu_id[] = { |
|
X86_MATCH_FEATURE(X86_FEATURE_AES, NULL), |
|
{} |
|
}; |
|
MODULE_DEVICE_TABLE(x86cpu, aesni_cpu_id); |
|
|
|
static int __init aesni_init(void) |
|
{ |
|
int err; |
|
|
|
if (!x86_match_cpu(aesni_cpu_id)) |
|
return -ENODEV; |
|
#ifdef CONFIG_X86_64 |
|
if (boot_cpu_has(X86_FEATURE_AVX2)) { |
|
pr_info("AVX2 version of gcm_enc/dec engaged.\n"); |
|
static_branch_enable(&gcm_use_avx); |
|
static_branch_enable(&gcm_use_avx2); |
|
} else |
|
if (boot_cpu_has(X86_FEATURE_AVX)) { |
|
pr_info("AVX version of gcm_enc/dec engaged.\n"); |
|
static_branch_enable(&gcm_use_avx); |
|
} else { |
|
pr_info("SSE version of gcm_enc/dec engaged.\n"); |
|
} |
|
if (boot_cpu_has(X86_FEATURE_AVX)) { |
|
/* optimize performance of ctr mode encryption transform */ |
|
static_call_update(aesni_ctr_enc_tfm, aesni_ctr_enc_avx_tfm); |
|
pr_info("AES CTR mode by8 optimization enabled\n"); |
|
} |
|
#endif |
|
|
|
err = crypto_register_alg(&aesni_cipher_alg); |
|
if (err) |
|
return err; |
|
|
|
err = simd_register_skciphers_compat(aesni_skciphers, |
|
ARRAY_SIZE(aesni_skciphers), |
|
aesni_simd_skciphers); |
|
if (err) |
|
goto unregister_cipher; |
|
|
|
err = simd_register_aeads_compat(aesni_aeads, ARRAY_SIZE(aesni_aeads), |
|
aesni_simd_aeads); |
|
if (err) |
|
goto unregister_skciphers; |
|
|
|
return 0; |
|
|
|
unregister_skciphers: |
|
simd_unregister_skciphers(aesni_skciphers, ARRAY_SIZE(aesni_skciphers), |
|
aesni_simd_skciphers); |
|
unregister_cipher: |
|
crypto_unregister_alg(&aesni_cipher_alg); |
|
return err; |
|
} |
|
|
|
static void __exit aesni_exit(void) |
|
{ |
|
simd_unregister_aeads(aesni_aeads, ARRAY_SIZE(aesni_aeads), |
|
aesni_simd_aeads); |
|
simd_unregister_skciphers(aesni_skciphers, ARRAY_SIZE(aesni_skciphers), |
|
aesni_simd_skciphers); |
|
crypto_unregister_alg(&aesni_cipher_alg); |
|
} |
|
|
|
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");
|
|
|