-/* crypto/aes/aes_cfb.c -*- mode:C; c-file-style: "eay" -*- */
-/* ====================================================================
- * Copyright (c) 1998-2002 The OpenSSL Project. All rights reserved.
+/*
+ * Copyright 2002-2016 The OpenSSL Project Authors. 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.
- * ====================================================================
- *
- */
-/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
- *
- * This package is an SSL implementation written
- * by Eric Young (eay@cryptsoft.com).
- * The implementation was written so as to conform with Netscapes SSL.
- *
- * This library is free for commercial and non-commercial use as long as
- * the following conditions are aheared to. The following conditions
- * apply to all code found in this distribution, be it the RC4, RSA,
- * lhash, DES, etc., code; not just the SSL code. The SSL documentation
- * included with this distribution is covered by the same copyright terms
- * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- *
- * Copyright remains Eric Young's, and as such any Copyright notices in
- * the code are not to be removed.
- * If this package is used in a product, Eric Young should be given attribution
- * as the author of the parts of the library used.
- * This can be in the form of a textual message at program startup or
- * in documentation (online or textual) provided with the package.
- *
- * 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 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 acknowledgement:
- * "This product includes cryptographic software written by
- * Eric Young (eay@cryptsoft.com)"
- * The word 'cryptographic' can be left out if the rouines from the library
- * being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from
- * the apps directory (application code) you must include an acknowledgement:
- * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- *
- * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``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 AUTHOR 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.
- *
- * The licence and distribution terms for any publically available version or
- * derivative of this code cannot be changed. i.e. this code cannot simply be
- * copied and put under another distribution licence
- * [including the GNU Public Licence.]
+ * Licensed under the Apache License 2.0 (the "License"). You may not use
+ * this file except in compliance with the License. You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
*/
-#ifndef AES_DEBUG
-# ifndef NDEBUG
-# define NDEBUG
-# endif
-#endif
-#include <assert.h>
-
#include <openssl/aes.h>
-#include "aes_locl.h"
-#include "e_os.h"
+#include <openssl/modes.h>
-/* The input and output encrypted as though 128bit cfb mode is being
- * used. The extra state information to record how much of the
- * 128bit block we have used is contained in *num;
+/*
+ * The input and output encrypted as though 128bit cfb mode is being used.
+ * The extra state information to record how much of the 128bit block we have
+ * used is contained in *num;
*/
void AES_cfb128_encrypt(const unsigned char *in, unsigned char *out,
- const unsigned long length, const AES_KEY *key,
- unsigned char *ivec, int *num, const int enc) {
-
- unsigned int n;
- unsigned long l = length;
- unsigned char c;
-
- assert(in && out && key && ivec && num);
+ size_t length, const AES_KEY *key,
+ unsigned char *ivec, int *num, const int enc)
+{
- n = *num;
-
- if (enc) {
- while (l--) {
- if (n == 0) {
- AES_encrypt(ivec, ivec, key);
- }
- ivec[n] = *(out++) = *(in++) ^ ivec[n];
- n = (n+1) % AES_BLOCK_SIZE;
- }
- } else {
- while (l--) {
- if (n == 0) {
- AES_encrypt(ivec, ivec, key);
- }
- c = *(in);
- *(out++) = *(in++) ^ ivec[n];
- ivec[n] = c;
- n = (n+1) % AES_BLOCK_SIZE;
- }
- }
-
- *num=n;
+ CRYPTO_cfb128_encrypt(in, out, length, key, ivec, num, enc,
+ (block128_f) AES_encrypt);
}
-/* This expects a single block of size nbits for both in and out. Note that
- it corrupts any extra bits in the last byte of out */
-void AES_cfbr_encrypt_block(const unsigned char *in,unsigned char *out,
- const int nbits,const AES_KEY *key,
- unsigned char *ivec,const int enc)
- {
- int n,rem,num;
- unsigned char ovec[AES_BLOCK_SIZE*2];
-
- if (nbits<=0 || nbits>128) return;
-
- /* fill in the first half of the new IV with the current IV */
- memcpy(ovec,ivec,AES_BLOCK_SIZE);
- /* construct the new IV */
- AES_encrypt(ivec,ivec,key);
- num = (nbits+7)/8;
- if (enc) /* encrypt the input */
- for(n=0 ; n < num ; ++n)
- out[n] = (ovec[AES_BLOCK_SIZE+n] = in[n] ^ ivec[n]);
- else /* decrypt the input */
- for(n=0 ; n < num ; ++n)
- out[n] = (ovec[AES_BLOCK_SIZE+n] = in[n]) ^ ivec[n];
- /* shift ovec left... */
- rem = nbits%8;
- num = nbits/8;
- if(rem==0)
- memcpy(ivec,ovec+num,AES_BLOCK_SIZE);
- else
- for(n=0 ; n < AES_BLOCK_SIZE ; ++n)
- ivec[n] = ovec[n+num]<<rem | ovec[n+num+1]>>(8-rem);
-
- /* it is not necessary to cleanse ovec, since the IV is not secret */
- }
-
/* N.B. This expects the input to be packed, MS bit first */
void AES_cfb1_encrypt(const unsigned char *in, unsigned char *out,
- const unsigned long length, const AES_KEY *key,
- unsigned char *ivec, int *num, const int enc)
- {
- unsigned int n;
- unsigned char c[1],d[1];
-
- assert(in && out && key && ivec && num);
- assert(*num == 0);
-
- memset(out,0,(length+7)/8);
- for(n=0 ; n < length * 8; ++n)
- {
- c[0]=(in[n/8]&(1 << (7-n%8))) ? 0x80 : 0;
- AES_cfbr_encrypt_block(c,d,1,key,ivec,enc);
- out[n/8]=(out[n/8]&~(1 << (7-n%8)))|((d[0]&0x80) >> (n%8));
- }
- }
+ size_t length, const AES_KEY *key,
+ unsigned char *ivec, int *num, const int enc)
+{
+ CRYPTO_cfb128_1_encrypt(in, out, length, key, ivec, num, enc,
+ (block128_f) AES_encrypt);
+}
void AES_cfb8_encrypt(const unsigned char *in, unsigned char *out,
- const unsigned long length, const AES_KEY *key,
- unsigned char *ivec, int *num, const int enc)
- {
- unsigned int n;
-
- assert(in && out && key && ivec && num);
- assert(*num == 0);
-
- for(n=0 ; n < length ; ++n)
- AES_cfbr_encrypt_block(&in[n],&out[n],8,key,ivec,enc);
- }
-
+ size_t length, const AES_KEY *key,
+ unsigned char *ivec, int *num, const int enc)
+{
+ CRYPTO_cfb128_8_encrypt(in, out, length, key, ivec, num, enc,
+ (block128_f) AES_encrypt);
+}
projects / openssl.git / blobdiff