Delete bundled copy of OpenSSL and replace with README.

openssl/crypto/modes/ofb128.c

-/* ====================================================================
- * Copyright (c) 2008 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 <openssl/crypto.h>
-#include "modes_lcl.h"
-#include <string.h>
-
-#ifndef MODES_DEBUG
-# ifndef NDEBUG
-#  define NDEBUG
-# endif
-#endif
-#include <assert.h>
-
-/* The input and output encrypted as though 128bit ofb mode is being
- * used.  The extra state information to record how much of the
- * 128bit block we have used is contained in *num;
- */
-void CRYPTO_ofb128_encrypt(const unsigned char *in, unsigned char *out,
-                        size_t len, const void *key,
-                        unsigned char ivec[16], int *num,
-                        block128_f block)
-{
-        unsigned int n;
-        size_t l=0;
-
-        assert(in && out && key && ivec && num);
-
-        n = *num;
-
-#if !defined(OPENSSL_SMALL_FOOTPRINT)
-        if (16%sizeof(size_t) == 0) do { /* always true actually */
-                while (n && len) {
-                        *(out++) = *(in++) ^ ivec[n];
-                        --len;
-                        n = (n+1) % 16;
-                }
-#if defined(STRICT_ALIGNMENT)
-                if (((size_t)in|(size_t)out|(size_t)ivec)%sizeof(size_t) != 0)
-                        break;
-#endif
-                while (len>=16) {
-                        (*block)(ivec, ivec, key);
-                        for (; n<16; n+=sizeof(size_t))
-                                *(size_t*)(out+n) =
-                                *(size_t*)(in+n) ^ *(size_t*)(ivec+n);
-                        len -= 16;
-                        out += 16;
-                        in  += 16;
-                        n = 0;
-                }
-                if (len) {
-                        (*block)(ivec, ivec, key);
-                        while (len--) {
-                                out[n] = in[n] ^ ivec[n];
-                                ++n;
-                        }
-                }
-                *num = n;
-                return;
-        } while(0);
-        /* the rest would be commonly eliminated by x86* compiler */
-#endif
-        while (l<len) {
-                if (n==0) {
-                        (*block)(ivec, ivec, key);
-                }
-                out[l] = in[l] ^ ivec[n];
-                ++l;
-                n = (n+1) % 16;
-        }
-
-        *num=n;
-}