aes_cfb.c revision 238405
1109998Smarkm/* crypto/aes/aes_cfb.c -*- mode:C; c-file-style: "eay" -*- */ 2109998Smarkm/* ==================================================================== 3238405Sjkim * Copyright (c) 2002-2006 The OpenSSL Project. All rights reserved. 4109998Smarkm * 5109998Smarkm * Redistribution and use in source and binary forms, with or without 6109998Smarkm * modification, are permitted provided that the following conditions 7109998Smarkm * are met: 8109998Smarkm * 9109998Smarkm * 1. Redistributions of source code must retain the above copyright 10109998Smarkm * notice, this list of conditions and the following disclaimer. 11109998Smarkm * 12109998Smarkm * 2. Redistributions in binary form must reproduce the above copyright 13109998Smarkm * notice, this list of conditions and the following disclaimer in 14109998Smarkm * the documentation and/or other materials provided with the 15109998Smarkm * distribution. 16109998Smarkm * 17109998Smarkm * 3. All advertising materials mentioning features or use of this 18109998Smarkm * software must display the following acknowledgment: 19109998Smarkm * "This product includes software developed by the OpenSSL Project 20109998Smarkm * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" 21109998Smarkm * 22109998Smarkm * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 23109998Smarkm * endorse or promote products derived from this software without 24109998Smarkm * prior written permission. For written permission, please contact 25109998Smarkm * openssl-core@openssl.org. 26109998Smarkm * 27109998Smarkm * 5. Products derived from this software may not be called "OpenSSL" 28109998Smarkm * nor may "OpenSSL" appear in their names without prior written 29109998Smarkm * permission of the OpenSSL Project. 30109998Smarkm * 31109998Smarkm * 6. Redistributions of any form whatsoever must retain the following 32109998Smarkm * acknowledgment: 33109998Smarkm * "This product includes software developed by the OpenSSL Project 34109998Smarkm * for use in the OpenSSL Toolkit (http://www.openssl.org/)" 35109998Smarkm * 36109998Smarkm * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 37109998Smarkm * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 38109998Smarkm * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 39109998Smarkm * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 40109998Smarkm * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 41109998Smarkm * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 42109998Smarkm * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 43109998Smarkm * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 44109998Smarkm * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 45109998Smarkm * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 46109998Smarkm * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 47109998Smarkm * OF THE POSSIBILITY OF SUCH DAMAGE. 48109998Smarkm * ==================================================================== 49109998Smarkm * 50109998Smarkm */ 51109998Smarkm 52109998Smarkm#include <openssl/aes.h> 53238405Sjkim#include <openssl/modes.h> 54109998Smarkm 55109998Smarkm/* The input and output encrypted as though 128bit cfb mode is being 56109998Smarkm * used. The extra state information to record how much of the 57109998Smarkm * 128bit block we have used is contained in *num; 58109998Smarkm */ 59109998Smarkm 60109998Smarkmvoid AES_cfb128_encrypt(const unsigned char *in, unsigned char *out, 61238405Sjkim size_t length, const AES_KEY *key, 62109998Smarkm unsigned char *ivec, int *num, const int enc) { 63109998Smarkm 64238405Sjkim CRYPTO_cfb128_encrypt(in,out,length,key,ivec,num,enc,(block128_f)AES_encrypt); 65109998Smarkm} 66109998Smarkm 67142425Snectar/* N.B. This expects the input to be packed, MS bit first */ 68142425Snectarvoid AES_cfb1_encrypt(const unsigned char *in, unsigned char *out, 69238405Sjkim size_t length, const AES_KEY *key, 70142425Snectar unsigned char *ivec, int *num, const int enc) 71142425Snectar { 72238405Sjkim CRYPTO_cfb128_1_encrypt(in,out,length,key,ivec,num,enc,(block128_f)AES_encrypt); 73142425Snectar } 74142425Snectar 75142425Snectarvoid AES_cfb8_encrypt(const unsigned char *in, unsigned char *out, 76238405Sjkim size_t length, const AES_KEY *key, 77142425Snectar unsigned char *ivec, int *num, const int enc) 78142425Snectar { 79238405Sjkim CRYPTO_cfb128_8_encrypt(in,out,length,key,ivec,num,enc,(block128_f)AES_encrypt); 80142425Snectar } 81142425Snectar 82