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authorUros Majstorovic <majstor@majstor.org>2022-02-02 06:25:38 +0100
committerUros Majstorovic <majstor@majstor.org>2022-02-02 06:25:38 +0100
commit378d4ce7552df580e3ddd89c2faa9f8c5086d646 (patch)
tree36fe323de93de5d6b8fb27827fc57984c5b15f6d /ext/libressl/crypto/modes/ofb128.c
parent9d775a05562d6166a5142d9820ffa7c26de55d6c (diff)
renamed crypto -> ext
Diffstat (limited to 'ext/libressl/crypto/modes/ofb128.c')
-rw-r--r--ext/libressl/crypto/modes/ofb128.c119
1 files changed, 119 insertions, 0 deletions
diff --git a/ext/libressl/crypto/modes/ofb128.c b/ext/libressl/crypto/modes/ofb128.c
new file mode 100644
index 0000000..c6ca67a
--- /dev/null
+++ b/ext/libressl/crypto/modes/ofb128.c
@@ -0,0 +1,119 @@
+/* $OpenBSD: ofb128.c,v 1.4 2015/02/10 09:46:30 miod Exp $ */
+/* ====================================================================
+ * 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
+
+/* 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;
+
+ 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;
+ }
+#ifdef __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;
+}