mirror of
https://github.com/pineappleEA/pineapple-src.git
synced 2024-12-11 09:38:25 -05:00
195 lines
6.3 KiB
C
Executable File
195 lines
6.3 KiB
C
Executable File
/* $OpenBSD: aes_ige.c,v 1.7 2015/02/10 09:46:30 miod Exp $ */
|
|
/* ====================================================================
|
|
* Copyright (c) 2006 The OpenSSL Project. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
*
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in
|
|
* the documentation and/or other materials provided with the
|
|
* distribution.
|
|
*
|
|
* 3. All advertising materials mentioning features or use of this
|
|
* software must display the following acknowledgment:
|
|
* "This product includes software developed by the OpenSSL Project
|
|
* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
|
|
*
|
|
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
|
|
* endorse or promote products derived from this software without
|
|
* prior written permission. For written permission, please contact
|
|
* openssl-core@openssl.org.
|
|
*
|
|
* 5. Products derived from this software may not be called "OpenSSL"
|
|
* nor may "OpenSSL" appear in their names without prior written
|
|
* permission of the OpenSSL Project.
|
|
*
|
|
* 6. Redistributions of any form whatsoever must retain the following
|
|
* acknowledgment:
|
|
* "This product includes software developed by the OpenSSL Project
|
|
* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
|
|
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
|
|
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
|
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
|
|
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
|
|
* OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
* ====================================================================
|
|
*
|
|
*/
|
|
|
|
#include <openssl/aes.h>
|
|
#include <openssl/crypto.h>
|
|
|
|
#include "aes_locl.h"
|
|
|
|
#define N_WORDS (AES_BLOCK_SIZE / sizeof(unsigned long))
|
|
typedef struct {
|
|
unsigned long data[N_WORDS];
|
|
} aes_block_t;
|
|
|
|
/* XXX: probably some better way to do this */
|
|
#if defined(__i386__) || defined(__x86_64__)
|
|
#define UNALIGNED_MEMOPS_ARE_FAST 1
|
|
#else
|
|
#define UNALIGNED_MEMOPS_ARE_FAST 0
|
|
#endif
|
|
|
|
#if UNALIGNED_MEMOPS_ARE_FAST
|
|
#define load_block(d, s) (d) = *(const aes_block_t *)(s)
|
|
#define store_block(d, s) *(aes_block_t *)(d) = (s)
|
|
#else
|
|
#define load_block(d, s) memcpy((d).data, (s), AES_BLOCK_SIZE)
|
|
#define store_block(d, s) memcpy((d), (s).data, AES_BLOCK_SIZE)
|
|
#endif
|
|
|
|
/* N.B. The IV for this mode is _twice_ the block size */
|
|
|
|
void
|
|
AES_ige_encrypt(const unsigned char *in, unsigned char *out, size_t length,
|
|
const AES_KEY *key, unsigned char *ivec, const int enc)
|
|
{
|
|
size_t n;
|
|
size_t len;
|
|
|
|
OPENSSL_assert((length % AES_BLOCK_SIZE) == 0);
|
|
|
|
len = length / AES_BLOCK_SIZE;
|
|
|
|
if (AES_ENCRYPT == enc) {
|
|
if (in != out && (UNALIGNED_MEMOPS_ARE_FAST ||
|
|
((size_t)in|(size_t)out|(size_t)ivec) %
|
|
sizeof(long) == 0)) {
|
|
aes_block_t *ivp = (aes_block_t *)ivec;
|
|
aes_block_t *iv2p = (aes_block_t *)(ivec + AES_BLOCK_SIZE);
|
|
|
|
while (len) {
|
|
aes_block_t *inp = (aes_block_t *)in;
|
|
aes_block_t *outp = (aes_block_t *)out;
|
|
|
|
for (n = 0; n < N_WORDS; ++n)
|
|
outp->data[n] = inp->data[n] ^ ivp->data[n];
|
|
AES_encrypt((unsigned char *)outp->data, (unsigned char *)outp->data, key);
|
|
for (n = 0; n < N_WORDS; ++n)
|
|
outp->data[n] ^= iv2p->data[n];
|
|
ivp = outp;
|
|
iv2p = inp;
|
|
--len;
|
|
in += AES_BLOCK_SIZE;
|
|
out += AES_BLOCK_SIZE;
|
|
}
|
|
memcpy(ivec, ivp->data, AES_BLOCK_SIZE);
|
|
memcpy(ivec + AES_BLOCK_SIZE, iv2p->data, AES_BLOCK_SIZE);
|
|
} else {
|
|
aes_block_t tmp, tmp2;
|
|
aes_block_t iv;
|
|
aes_block_t iv2;
|
|
|
|
load_block(iv, ivec);
|
|
load_block(iv2, ivec + AES_BLOCK_SIZE);
|
|
|
|
while (len) {
|
|
load_block(tmp, in);
|
|
for (n = 0; n < N_WORDS; ++n)
|
|
tmp2.data[n] = tmp.data[n] ^ iv.data[n];
|
|
AES_encrypt((unsigned char *)tmp2.data,
|
|
(unsigned char *)tmp2.data, key);
|
|
for (n = 0; n < N_WORDS; ++n)
|
|
tmp2.data[n] ^= iv2.data[n];
|
|
store_block(out, tmp2);
|
|
iv = tmp2;
|
|
iv2 = tmp;
|
|
--len;
|
|
in += AES_BLOCK_SIZE;
|
|
out += AES_BLOCK_SIZE;
|
|
}
|
|
memcpy(ivec, iv.data, AES_BLOCK_SIZE);
|
|
memcpy(ivec + AES_BLOCK_SIZE, iv2.data, AES_BLOCK_SIZE);
|
|
}
|
|
} else {
|
|
if (in != out && (UNALIGNED_MEMOPS_ARE_FAST ||
|
|
((size_t)in|(size_t)out|(size_t)ivec) %
|
|
sizeof(long) == 0)) {
|
|
aes_block_t *ivp = (aes_block_t *)ivec;
|
|
aes_block_t *iv2p = (aes_block_t *)(ivec + AES_BLOCK_SIZE);
|
|
|
|
while (len) {
|
|
aes_block_t tmp;
|
|
aes_block_t *inp = (aes_block_t *)in;
|
|
aes_block_t *outp = (aes_block_t *)out;
|
|
|
|
for (n = 0; n < N_WORDS; ++n)
|
|
tmp.data[n] = inp->data[n] ^ iv2p->data[n];
|
|
AES_decrypt((unsigned char *)tmp.data,
|
|
(unsigned char *)outp->data, key);
|
|
for (n = 0; n < N_WORDS; ++n)
|
|
outp->data[n] ^= ivp->data[n];
|
|
ivp = inp;
|
|
iv2p = outp;
|
|
--len;
|
|
in += AES_BLOCK_SIZE;
|
|
out += AES_BLOCK_SIZE;
|
|
}
|
|
memcpy(ivec, ivp->data, AES_BLOCK_SIZE);
|
|
memcpy(ivec + AES_BLOCK_SIZE, iv2p->data, AES_BLOCK_SIZE);
|
|
} else {
|
|
aes_block_t tmp, tmp2;
|
|
aes_block_t iv;
|
|
aes_block_t iv2;
|
|
|
|
load_block(iv, ivec);
|
|
load_block(iv2, ivec + AES_BLOCK_SIZE);
|
|
|
|
while (len) {
|
|
load_block(tmp, in);
|
|
tmp2 = tmp;
|
|
for (n = 0; n < N_WORDS; ++n)
|
|
tmp.data[n] ^= iv2.data[n];
|
|
AES_decrypt((unsigned char *)tmp.data,
|
|
(unsigned char *)tmp.data, key);
|
|
for (n = 0; n < N_WORDS; ++n)
|
|
tmp.data[n] ^= iv.data[n];
|
|
store_block(out, tmp);
|
|
iv = tmp2;
|
|
iv2 = tmp;
|
|
--len;
|
|
in += AES_BLOCK_SIZE;
|
|
out += AES_BLOCK_SIZE;
|
|
}
|
|
memcpy(ivec, iv.data, AES_BLOCK_SIZE);
|
|
memcpy(ivec + AES_BLOCK_SIZE, iv2.data, AES_BLOCK_SIZE);
|
|
}
|
|
}
|
|
}
|