257 lines
10 KiB
C
257 lines
10 KiB
C
/* crypto/camellia/camellia_cbc.c -*- mode:C; c-file-style: "eay" -*- */
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/* ====================================================================
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* Copyright (c) 2006 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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* openssl-core@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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*/
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#ifndef CAMELLIA_DEBUG
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# ifndef NDEBUG
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# define NDEBUG
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# endif
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#endif
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#include <assert.h>
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#include <stdio.h>
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#include <string.h>
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#include <openssl/camellia.h>
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#include "cmll_locl.h"
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void Camellia_cbc_encrypt(const unsigned char *in, unsigned char *out,
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const unsigned long length, const CAMELLIA_KEY *key,
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unsigned char *ivec, const int enc)
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{
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unsigned long n;
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unsigned long len = length;
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const unsigned char *iv = ivec;
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union {
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u32 t32[CAMELLIA_BLOCK_SIZE / sizeof(u32)];
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u8 t8[CAMELLIA_BLOCK_SIZE];
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} tmp;
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const union {
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long one;
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char little;
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} camellia_endian = {
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1
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};
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assert(in && out && key && ivec);
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assert((CAMELLIA_ENCRYPT == enc) || (CAMELLIA_DECRYPT == enc));
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if (((size_t)in | (size_t)out | (size_t)ivec) % sizeof(u32) == 0) {
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if (CAMELLIA_ENCRYPT == enc) {
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while (len >= CAMELLIA_BLOCK_SIZE) {
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XOR4WORD2((u32 *)out, (u32 *)in, (u32 *)iv);
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if (camellia_endian.little)
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SWAP4WORD((u32 *)out);
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key->enc(key->rd_key, (u32 *)out);
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if (camellia_endian.little)
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SWAP4WORD((u32 *)out);
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iv = out;
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len -= CAMELLIA_BLOCK_SIZE;
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in += CAMELLIA_BLOCK_SIZE;
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out += CAMELLIA_BLOCK_SIZE;
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}
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if (len) {
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for (n = 0; n < len; ++n)
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out[n] = in[n] ^ iv[n];
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for (n = len; n < CAMELLIA_BLOCK_SIZE; ++n)
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out[n] = iv[n];
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if (camellia_endian.little)
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SWAP4WORD((u32 *)out);
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key->enc(key->rd_key, (u32 *)out);
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if (camellia_endian.little)
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SWAP4WORD((u32 *)out);
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iv = out;
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}
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memcpy(ivec, iv, CAMELLIA_BLOCK_SIZE);
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} else if (in != out) {
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while (len >= CAMELLIA_BLOCK_SIZE) {
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memcpy(out, in, CAMELLIA_BLOCK_SIZE);
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if (camellia_endian.little)
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SWAP4WORD((u32 *)out);
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key->dec(key->rd_key, (u32 *)out);
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if (camellia_endian.little)
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SWAP4WORD((u32 *)out);
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XOR4WORD((u32 *)out, (u32 *)iv);
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iv = in;
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len -= CAMELLIA_BLOCK_SIZE;
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in += CAMELLIA_BLOCK_SIZE;
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out += CAMELLIA_BLOCK_SIZE;
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}
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if (len) {
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memcpy(tmp.t8, in, CAMELLIA_BLOCK_SIZE);
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if (camellia_endian.little)
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SWAP4WORD(tmp.t32);
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key->dec(key->rd_key, tmp.t32);
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if (camellia_endian.little)
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SWAP4WORD(tmp.t32);
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for (n = 0; n < len; ++n)
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out[n] = tmp.t8[n] ^ iv[n];
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iv = in;
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}
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memcpy(ivec, iv, CAMELLIA_BLOCK_SIZE);
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} else { /* in == out */
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while (len >= CAMELLIA_BLOCK_SIZE) {
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memcpy(tmp.t8, in, CAMELLIA_BLOCK_SIZE);
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if (camellia_endian.little)
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SWAP4WORD((u32 *)out);
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key->dec(key->rd_key, (u32 *)out);
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if (camellia_endian.little)
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SWAP4WORD((u32 *)out);
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XOR4WORD((u32 *)out, (u32 *)ivec);
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memcpy(ivec, tmp.t8, CAMELLIA_BLOCK_SIZE);
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len -= CAMELLIA_BLOCK_SIZE;
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in += CAMELLIA_BLOCK_SIZE;
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out += CAMELLIA_BLOCK_SIZE;
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}
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if (len) {
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memcpy(tmp.t8, in, CAMELLIA_BLOCK_SIZE);
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if (camellia_endian.little)
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SWAP4WORD((u32 *)out);
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key->dec(key->rd_key, (u32 *)out);
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if (camellia_endian.little)
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SWAP4WORD((u32 *)out);
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for (n = 0; n < len; ++n)
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out[n] ^= ivec[n];
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for (n = len; n < CAMELLIA_BLOCK_SIZE; ++n)
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out[n] = tmp.t8[n];
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memcpy(ivec, tmp.t8, CAMELLIA_BLOCK_SIZE);
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}
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}
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} else { /* no aligned */
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if (CAMELLIA_ENCRYPT == enc) {
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while (len >= CAMELLIA_BLOCK_SIZE) {
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for (n = 0; n < CAMELLIA_BLOCK_SIZE; ++n)
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tmp.t8[n] = in[n] ^ iv[n];
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if (camellia_endian.little)
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SWAP4WORD(tmp.t32);
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key->enc(key->rd_key, tmp.t32);
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if (camellia_endian.little)
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SWAP4WORD(tmp.t32);
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memcpy(out, tmp.t8, CAMELLIA_BLOCK_SIZE);
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iv = out;
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len -= CAMELLIA_BLOCK_SIZE;
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in += CAMELLIA_BLOCK_SIZE;
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out += CAMELLIA_BLOCK_SIZE;
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}
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if (len) {
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for (n = 0; n < len; ++n)
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tmp.t8[n] = in[n] ^ iv[n];
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for (n = len; n < CAMELLIA_BLOCK_SIZE; ++n)
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tmp.t8[n] = iv[n];
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if (camellia_endian.little)
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SWAP4WORD(tmp.t32);
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key->enc(key->rd_key, tmp.t32);
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if (camellia_endian.little)
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SWAP4WORD(tmp.t32);
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memcpy(out, tmp.t8, CAMELLIA_BLOCK_SIZE);
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iv = out;
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}
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memcpy(ivec, iv, CAMELLIA_BLOCK_SIZE);
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} else if (in != out) {
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while (len >= CAMELLIA_BLOCK_SIZE) {
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memcpy(tmp.t8, in, CAMELLIA_BLOCK_SIZE);
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if (camellia_endian.little)
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SWAP4WORD(tmp.t32);
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key->dec(key->rd_key, tmp.t32);
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if (camellia_endian.little)
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SWAP4WORD(tmp.t32);
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for (n = 0; n < CAMELLIA_BLOCK_SIZE; ++n)
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out[n] = tmp.t8[n] ^ iv[n];
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iv = in;
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len -= CAMELLIA_BLOCK_SIZE;
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in += CAMELLIA_BLOCK_SIZE;
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out += CAMELLIA_BLOCK_SIZE;
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}
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if (len) {
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memcpy(tmp.t8, in, CAMELLIA_BLOCK_SIZE);
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if (camellia_endian.little)
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SWAP4WORD(tmp.t32);
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key->dec(key->rd_key, tmp.t32);
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if (camellia_endian.little)
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SWAP4WORD(tmp.t32);
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for (n = 0; n < len; ++n)
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out[n] = tmp.t8[n] ^ iv[n];
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iv = in;
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}
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memcpy(ivec, iv, CAMELLIA_BLOCK_SIZE);
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} else {
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while (len >= CAMELLIA_BLOCK_SIZE) {
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memcpy(tmp.t8, in, CAMELLIA_BLOCK_SIZE);
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if (camellia_endian.little)
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SWAP4WORD(tmp.t32);
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key->dec(key->rd_key, tmp.t32);
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if (camellia_endian.little)
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SWAP4WORD(tmp.t32);
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for (n = 0; n < CAMELLIA_BLOCK_SIZE; ++n)
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tmp.t8[n] ^= ivec[n];
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memcpy(ivec, in, CAMELLIA_BLOCK_SIZE);
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memcpy(out, tmp.t8, CAMELLIA_BLOCK_SIZE);
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len -= CAMELLIA_BLOCK_SIZE;
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in += CAMELLIA_BLOCK_SIZE;
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out += CAMELLIA_BLOCK_SIZE;
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}
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if (len) {
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memcpy(tmp.t8, in, CAMELLIA_BLOCK_SIZE);
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if (camellia_endian.little)
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SWAP4WORD(tmp.t32);
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key->dec(key->rd_key, tmp.t32);
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if (camellia_endian.little)
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SWAP4WORD(tmp.t32);
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for (n = 0; n < len; ++n)
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tmp.t8[n] ^= ivec[n];
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memcpy(ivec, in, CAMELLIA_BLOCK_SIZE);
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memcpy(out, tmp.t8, len);
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}
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}
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}
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}
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