From 378d4ce7552df580e3ddd89c2faa9f8c5086d646 Mon Sep 17 00:00:00 2001 From: Uros Majstorovic Date: Wed, 2 Feb 2022 06:25:38 +0100 Subject: renamed crypto -> ext --- ext/libressl/crypto/aes/aes_ige.c | 194 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 194 insertions(+) create mode 100644 ext/libressl/crypto/aes/aes_ige.c (limited to 'ext/libressl/crypto/aes/aes_ige.c') diff --git a/ext/libressl/crypto/aes/aes_ige.c b/ext/libressl/crypto/aes/aes_ige.c new file mode 100644 index 0000000..85b7f69 --- /dev/null +++ b/ext/libressl/crypto/aes/aes_ige.c @@ -0,0 +1,194 @@ +/* $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 +#include + +#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); + } + } +} -- cgit v1.2.3