add: execute openssl fetcher to fetch openssl 1.0.1j

[cassiopeia.git] / lib / openssl / crypto / modes / ofb128.c

diff --git a/lib/openssl/crypto/modes/ofb128.c b/lib/openssl/crypto/modes/ofb128.c
new file mode 100644 (file)
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--- /dev/null
+++ b/lib/openssl/crypto/modes/ofb128.c
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+/* ====================================================================
+ * 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;
+}