563 lines
15 KiB
C
563 lines
15 KiB
C
/* $OpenBSD: eng_aesni.c,v 1.12 2022/12/26 07:18:51 jmc Exp $ */
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/*
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* Support for Intel AES-NI instruction set
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* Author: Huang Ying <ying.huang@intel.com>
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*
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* Intel AES-NI is a new set of Single Instruction Multiple Data
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* (SIMD) instructions that are going to be introduced in the next
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* generation of Intel processor, as of 2009. These instructions
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* enable fast and secure data encryption and decryption, using the
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* Advanced Encryption Standard (AES), defined by FIPS Publication
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* number 197. The architecture introduces six instructions that
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* offer full hardware support for AES. Four of them support high
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* performance data encryption and decryption, and the other two
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* instructions support the AES key expansion procedure.
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*
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* The white paper can be downloaded from:
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* http://softwarecommunity.intel.com/isn/downloads/intelavx/AES-Instructions-Set_WP.pdf
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*
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* This file is based on engines/e_padlock.c
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*/
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/* ====================================================================
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* Copyright (c) 1999-2001 The OpenSSL Project. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* licensing@OpenSSL.org.
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*
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* This product includes cryptographic software written by Eric Young
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* (eay@cryptsoft.com). This product includes software written by Tim
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* Hudson (tjh@cryptsoft.com).
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*
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*/
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#include <stdio.h>
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#include <openssl/opensslconf.h>
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#if !defined(OPENSSL_NO_HW) && !defined(OPENSSL_NO_HW_AES_NI) && !defined(OPENSSL_NO_AES)
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#include <openssl/aes.h>
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#include <openssl/dso.h>
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#include <openssl/engine.h>
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#include <openssl/err.h>
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#include <openssl/evp.h>
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/* AES-NI is available *ONLY* on some x86 CPUs. Not only that it
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doesn't exist elsewhere, but it even can't be compiled on other
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platforms! */
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#undef COMPILE_HW_AESNI
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#if (defined(__x86_64) || defined(__x86_64__) || \
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defined(_M_AMD64) || defined(_M_X64) || \
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defined(OPENSSL_IA32_SSE2)) && !defined(OPENSSL_NO_ASM) && !defined(__i386__)
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#define COMPILE_HW_AESNI
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#include "x86_arch.h"
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#endif
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static ENGINE *ENGINE_aesni(void);
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void ENGINE_load_aesni(void)
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{
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/* On non-x86 CPUs it just returns. */
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#ifdef COMPILE_HW_AESNI
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ENGINE *toadd = ENGINE_aesni();
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if (toadd == NULL)
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return;
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ENGINE_add(toadd);
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ENGINE_register_complete(toadd);
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ENGINE_free(toadd);
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ERR_clear_error();
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#endif
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}
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#ifdef COMPILE_HW_AESNI
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int aesni_set_encrypt_key(const unsigned char *userKey, int bits,
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AES_KEY *key);
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int aesni_set_decrypt_key(const unsigned char *userKey, int bits,
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AES_KEY *key);
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void aesni_encrypt(const unsigned char *in, unsigned char *out,
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const AES_KEY *key);
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void aesni_decrypt(const unsigned char *in, unsigned char *out,
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const AES_KEY *key);
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void aesni_ecb_encrypt(const unsigned char *in, unsigned char *out,
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size_t length, const AES_KEY *key, int enc);
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void aesni_cbc_encrypt(const unsigned char *in, unsigned char *out,
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size_t length, const AES_KEY *key, unsigned char *ivec, int enc);
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/* Function for ENGINE detection and control */
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static int aesni_init(ENGINE *e);
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/* Cipher Stuff */
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static int aesni_ciphers(ENGINE *e, const EVP_CIPHER **cipher,
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const int **nids, int nid);
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#define AESNI_MIN_ALIGN 16
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#define AESNI_ALIGN(x) \
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((void *)(((unsigned long)(x)+AESNI_MIN_ALIGN-1)&~(AESNI_MIN_ALIGN-1)))
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/* Engine names */
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static const char aesni_id[] = "aesni",
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aesni_name[] = "Intel AES-NI engine",
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no_aesni_name[] = "Intel AES-NI engine (no-aesni)";
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/* The input and output encrypted as though 128bit cfb mode is being
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* used. The extra state information to record how much of the
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* 128bit block we have used is contained in *num;
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*/
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static void
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aesni_cfb128_encrypt(const unsigned char *in, unsigned char *out,
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unsigned int len, const void *key, unsigned char ivec[16], int *num,
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int enc)
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{
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unsigned int n;
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size_t l = 0;
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n = *num;
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if (enc) {
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#if !defined(OPENSSL_SMALL_FOOTPRINT)
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if (16%sizeof(size_t) == 0) do { /* always true actually */
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while (n && len) {
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*(out++) = ivec[n] ^= *(in++);
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--len;
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n = (n + 1) % 16;
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}
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while (len >= 16) {
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aesni_encrypt(ivec, ivec, key);
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for (n = 0; n < 16; n += sizeof(size_t)) {
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*(size_t*)(out + n) =
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*(size_t*)(ivec + n) ^= *(size_t*)(in + n);
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}
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len -= 16;
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out += 16;
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in += 16;
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}
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n = 0;
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if (len) {
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aesni_encrypt(ivec, ivec, key);
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while (len--) {
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out[n] = ivec[n] ^= in[n];
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++n;
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}
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}
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*num = n;
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return;
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} while (0);
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/* the rest would be commonly eliminated by x86* compiler */
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#endif
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while (l < len) {
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if (n == 0) {
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aesni_encrypt(ivec, ivec, key);
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}
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out[l] = ivec[n] ^= in[l];
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++l;
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n = (n + 1) % 16;
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}
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*num = n;
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} else {
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#if !defined(OPENSSL_SMALL_FOOTPRINT)
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if (16%sizeof(size_t) == 0) do { /* always true actually */
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while (n && len) {
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unsigned char c;
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*(out++) = ivec[n] ^ (c = *(in++));
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ivec[n] = c;
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--len;
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n = (n + 1) % 16;
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}
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while (len >= 16) {
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aesni_encrypt(ivec, ivec, key);
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for (n = 0; n < 16; n += sizeof(size_t)) {
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size_t t = *(size_t*)(in + n);
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*(size_t*)(out + n) = *(size_t*)(ivec + n) ^ t;
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*(size_t*)(ivec + n) = t;
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}
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len -= 16;
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out += 16;
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in += 16;
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}
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n = 0;
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if (len) {
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aesni_encrypt(ivec, ivec, key);
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while (len--) {
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unsigned char c;
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out[n] = ivec[n] ^ (c = in[n]);
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ivec[n] = c;
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++n;
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}
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}
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*num = n;
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return;
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} while (0);
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/* the rest would be commonly eliminated by x86* compiler */
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#endif
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while (l < len) {
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unsigned char c;
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if (n == 0) {
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aesni_encrypt(ivec, ivec, key);
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}
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out[l] = ivec[n] ^ (c = in[l]);
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ivec[n] = c;
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++l;
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n = (n + 1) % 16;
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}
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*num = n;
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}
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}
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/* The input and output encrypted as though 128bit ofb mode is being
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* used. The extra state information to record how much of the
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* 128bit block we have used is contained in *num;
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*/
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static void
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aesni_ofb128_encrypt(const unsigned char *in, unsigned char *out,
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unsigned int len, const void *key, unsigned char ivec[16], int *num)
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{
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unsigned int n;
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size_t l = 0;
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n = *num;
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#if !defined(OPENSSL_SMALL_FOOTPRINT)
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if (16%sizeof(size_t) == 0) do { /* always true actually */
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while (n && len) {
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*(out++) = *(in++) ^ ivec[n];
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--len;
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n = (n + 1) % 16;
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}
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while (len >= 16) {
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aesni_encrypt(ivec, ivec, key);
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for (n = 0; n < 16; n += sizeof(size_t))
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*(size_t*)(out + n) =
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*(size_t*)(in + n) ^ *(size_t*)(ivec + n);
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len -= 16;
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out += 16;
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in += 16;
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}
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n = 0;
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if (len) {
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aesni_encrypt(ivec, ivec, key);
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while (len--) {
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out[n] = in[n] ^ ivec[n];
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++n;
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}
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}
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*num = n;
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return;
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} while (0);
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/* the rest would be commonly eliminated by x86* compiler */
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#endif
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while (l < len) {
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if (n == 0) {
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aesni_encrypt(ivec, ivec, key);
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}
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out[l] = in[l] ^ ivec[n];
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++l;
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n = (n + 1) % 16;
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}
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*num = n;
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}
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/* ===== Engine "management" functions ===== */
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/* Prepare the ENGINE structure for registration */
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static int
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aesni_bind_helper(ENGINE *e)
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{
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int engage;
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engage = (OPENSSL_cpu_caps() & CPUCAP_MASK_AESNI) != 0;
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/* Register everything or return with an error */
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if (!ENGINE_set_id(e, aesni_id) ||
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!ENGINE_set_name(e, engage ? aesni_name : no_aesni_name) ||
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!ENGINE_set_init_function(e, aesni_init) ||
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(engage && !ENGINE_set_ciphers (e, aesni_ciphers)))
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return 0;
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/* Everything looks good */
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return 1;
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}
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/* Constructor */
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static ENGINE *
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ENGINE_aesni(void)
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{
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ENGINE *eng = ENGINE_new();
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if (!eng) {
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return NULL;
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}
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if (!aesni_bind_helper(eng)) {
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ENGINE_free(eng);
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return NULL;
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}
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return eng;
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}
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/* Check availability of the engine */
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static int
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aesni_init(ENGINE *e)
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{
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return 1;
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}
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#if defined(NID_aes_128_cfb128) && ! defined (NID_aes_128_cfb)
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#define NID_aes_128_cfb NID_aes_128_cfb128
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#endif
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#if defined(NID_aes_128_ofb128) && ! defined (NID_aes_128_ofb)
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#define NID_aes_128_ofb NID_aes_128_ofb128
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#endif
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#if defined(NID_aes_192_cfb128) && ! defined (NID_aes_192_cfb)
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#define NID_aes_192_cfb NID_aes_192_cfb128
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#endif
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#if defined(NID_aes_192_ofb128) && ! defined (NID_aes_192_ofb)
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#define NID_aes_192_ofb NID_aes_192_ofb128
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#endif
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#if defined(NID_aes_256_cfb128) && ! defined (NID_aes_256_cfb)
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#define NID_aes_256_cfb NID_aes_256_cfb128
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#endif
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#if defined(NID_aes_256_ofb128) && ! defined (NID_aes_256_ofb)
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#define NID_aes_256_ofb NID_aes_256_ofb128
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#endif
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/* List of supported ciphers. */
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static int aesni_cipher_nids[] = {
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NID_aes_128_ecb,
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NID_aes_128_cbc,
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NID_aes_128_cfb,
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NID_aes_128_ofb,
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NID_aes_192_ecb,
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NID_aes_192_cbc,
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NID_aes_192_cfb,
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NID_aes_192_ofb,
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NID_aes_256_ecb,
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NID_aes_256_cbc,
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NID_aes_256_cfb,
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NID_aes_256_ofb,
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};
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static int aesni_cipher_nids_num =
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(sizeof(aesni_cipher_nids) / sizeof(aesni_cipher_nids[0]));
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typedef struct {
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AES_KEY ks;
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unsigned int _pad1[3];
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} AESNI_KEY;
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static int
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aesni_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *user_key,
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const unsigned char *iv, int enc)
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{
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int ret;
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AES_KEY *key = AESNI_ALIGN(ctx->cipher_data);
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if ((ctx->cipher->flags & EVP_CIPH_MODE) == EVP_CIPH_CFB_MODE ||
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(ctx->cipher->flags & EVP_CIPH_MODE) == EVP_CIPH_OFB_MODE ||
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enc)
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ret = aesni_set_encrypt_key(user_key, ctx->key_len * 8, key);
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else
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ret = aesni_set_decrypt_key(user_key, ctx->key_len * 8, key);
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if (ret < 0) {
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EVPerror(EVP_R_AES_KEY_SETUP_FAILED);
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return 0;
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}
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return 1;
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}
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static int
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aesni_cipher_ecb(EVP_CIPHER_CTX *ctx, unsigned char *out,
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const unsigned char *in, size_t inl)
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{
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AES_KEY *key = AESNI_ALIGN(ctx->cipher_data);
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aesni_ecb_encrypt(in, out, inl, key, ctx->encrypt);
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return 1;
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}
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static int
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aesni_cipher_cbc(EVP_CIPHER_CTX *ctx, unsigned char *out,
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const unsigned char *in, size_t inl)
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{
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AES_KEY *key = AESNI_ALIGN(ctx->cipher_data);
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aesni_cbc_encrypt(in, out, inl, key, ctx->iv, ctx->encrypt);
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return 1;
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}
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static int
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aesni_cipher_cfb(EVP_CIPHER_CTX *ctx, unsigned char *out,
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const unsigned char *in, size_t inl)
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{
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AES_KEY *key = AESNI_ALIGN(ctx->cipher_data);
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aesni_cfb128_encrypt(in, out, inl, key, ctx->iv, &ctx->num,
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ctx->encrypt);
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return 1;
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}
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static int
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aesni_cipher_ofb(EVP_CIPHER_CTX *ctx, unsigned char *out,
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const unsigned char *in, size_t inl)
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{
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AES_KEY *key = AESNI_ALIGN(ctx->cipher_data);
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aesni_ofb128_encrypt(in, out, inl, key, ctx->iv, &ctx->num);
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return 1;
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}
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#define AES_BLOCK_SIZE 16
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#define EVP_CIPHER_block_size_ECB AES_BLOCK_SIZE
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#define EVP_CIPHER_block_size_CBC AES_BLOCK_SIZE
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#define EVP_CIPHER_block_size_OFB 1
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#define EVP_CIPHER_block_size_CFB 1
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/* Declaring so many ciphers by hand would be a pain.
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Instead introduce a bit of preprocessor magic :-) */
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#define DECLARE_AES_EVP(ksize,lmode,umode) \
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static const EVP_CIPHER aesni_##ksize##_##lmode = { \
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NID_aes_##ksize##_##lmode, \
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EVP_CIPHER_block_size_##umode, \
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ksize / 8, \
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AES_BLOCK_SIZE, \
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0 | EVP_CIPH_##umode##_MODE, \
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aesni_init_key, \
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aesni_cipher_##lmode, \
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NULL, \
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sizeof(AESNI_KEY), \
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EVP_CIPHER_set_asn1_iv, \
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EVP_CIPHER_get_asn1_iv, \
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NULL, \
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NULL \
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}
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DECLARE_AES_EVP(128, ecb, ECB);
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DECLARE_AES_EVP(128, cbc, CBC);
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DECLARE_AES_EVP(128, cfb, CFB);
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DECLARE_AES_EVP(128, ofb, OFB);
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DECLARE_AES_EVP(192, ecb, ECB);
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DECLARE_AES_EVP(192, cbc, CBC);
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DECLARE_AES_EVP(192, cfb, CFB);
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DECLARE_AES_EVP(192, ofb, OFB);
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|
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DECLARE_AES_EVP(256, ecb, ECB);
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DECLARE_AES_EVP(256, cbc, CBC);
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DECLARE_AES_EVP(256, cfb, CFB);
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DECLARE_AES_EVP(256, ofb, OFB);
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|
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static int
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|
aesni_ciphers(ENGINE *e, const EVP_CIPHER **cipher, const int **nids, int nid)
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|
{
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|
/* No specific cipher => return a list of supported nids ... */
|
|
if (!cipher) {
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|
*nids = aesni_cipher_nids;
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|
return aesni_cipher_nids_num;
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|
}
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|
|
|
/* ... or the requested "cipher" otherwise */
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|
switch (nid) {
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|
case NID_aes_128_ecb:
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|
*cipher = &aesni_128_ecb;
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|
break;
|
|
case NID_aes_128_cbc:
|
|
*cipher = &aesni_128_cbc;
|
|
break;
|
|
case NID_aes_128_cfb:
|
|
*cipher = &aesni_128_cfb;
|
|
break;
|
|
case NID_aes_128_ofb:
|
|
*cipher = &aesni_128_ofb;
|
|
break;
|
|
|
|
case NID_aes_192_ecb:
|
|
*cipher = &aesni_192_ecb;
|
|
break;
|
|
case NID_aes_192_cbc:
|
|
*cipher = &aesni_192_cbc;
|
|
break;
|
|
case NID_aes_192_cfb:
|
|
*cipher = &aesni_192_cfb;
|
|
break;
|
|
case NID_aes_192_ofb:
|
|
*cipher = &aesni_192_ofb;
|
|
break;
|
|
|
|
case NID_aes_256_ecb:
|
|
*cipher = &aesni_256_ecb;
|
|
break;
|
|
case NID_aes_256_cbc:
|
|
*cipher = &aesni_256_cbc;
|
|
break;
|
|
case NID_aes_256_cfb:
|
|
*cipher = &aesni_256_cfb;
|
|
break;
|
|
case NID_aes_256_ofb:
|
|
*cipher = &aesni_256_ofb;
|
|
break;
|
|
|
|
default:
|
|
/* Sorry, we don't support this NID */
|
|
*cipher = NULL;
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
#endif /* COMPILE_HW_AESNI */
|
|
#endif /* !defined(OPENSSL_NO_HW) && !defined(OPENSSL_NO_HW_AESNI) && !defined(OPENSSL_NO_AES) */
|