/* * Copyright (c) 2007 Kungliga Tekniska Högskolan * (Royal Institute of Technology, Stockholm, Sweden). * 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. Neither the name of the Institute nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS 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 INSTITUTE OR 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 "config.h" #ifdef KRB5 #include <krb5-types.h> #endif #include <string.h> #include "camellia-ntt.h" #include "camellia.h" #include <roken.h> int CAMELLIA_set_key(const unsigned char *userkey, const int bits, CAMELLIA_KEY *key) { key->bits = bits; Camellia_Ekeygen(bits, userkey, key->key); return 1; } void CAMELLIA_encrypt(const unsigned char *in, unsigned char *out, const CAMELLIA_KEY *key) { Camellia_EncryptBlock(key->bits, in, key->key, out); } void CAMELLIA_decrypt(const unsigned char *in, unsigned char *out, const CAMELLIA_KEY *key) { Camellia_DecryptBlock(key->bits, in, key->key, out); } void CAMELLIA_cbc_encrypt(const unsigned char *in, unsigned char *out, unsigned long size, const CAMELLIA_KEY *key, unsigned char *iv, int mode_encrypt) { unsigned char tmp[CAMELLIA_BLOCK_SIZE]; int i; if (mode_encrypt) { while (size >= CAMELLIA_BLOCK_SIZE) { for (i = 0; i < CAMELLIA_BLOCK_SIZE; i++) tmp[i] = in[i] ^ iv[i]; CAMELLIA_encrypt(tmp, out, key); memcpy(iv, out, CAMELLIA_BLOCK_SIZE); size -= CAMELLIA_BLOCK_SIZE; in += CAMELLIA_BLOCK_SIZE; out += CAMELLIA_BLOCK_SIZE; } if (size) { for (i = 0; i < size; i++) tmp[i] = in[i] ^ iv[i]; for (i = size; i < CAMELLIA_BLOCK_SIZE; i++) tmp[i] = iv[i]; CAMELLIA_encrypt(tmp, out, key); memcpy(iv, out, CAMELLIA_BLOCK_SIZE); } } else { while (size >= CAMELLIA_BLOCK_SIZE) { memcpy(tmp, in, CAMELLIA_BLOCK_SIZE); CAMELLIA_decrypt(tmp, out, key); for (i = 0; i < CAMELLIA_BLOCK_SIZE; i++) out[i] ^= iv[i]; memcpy(iv, tmp, CAMELLIA_BLOCK_SIZE); size -= CAMELLIA_BLOCK_SIZE; in += CAMELLIA_BLOCK_SIZE; out += CAMELLIA_BLOCK_SIZE; } if (size) { memcpy(tmp, in, CAMELLIA_BLOCK_SIZE); CAMELLIA_decrypt(tmp, out, key); for (i = 0; i < size; i++) out[i] ^= iv[i]; memcpy(iv, tmp, CAMELLIA_BLOCK_SIZE); } } }