From aa4d426b4d3527d7e166df1a05058c9a4a0f6683 Mon Sep 17 00:00:00 2001
From: Wojtek Kosior <wk@koszkonutek-tmp.pl.eu.org>
Date: Fri, 30 Apr 2021 00:33:56 +0200
Subject: initial/final commit

---
 openssl-1.1.0h/crypto/des/ofb_enc.c | 82 +++++++++++++++++++++++++++++++++++++
 1 file changed, 82 insertions(+)
 create mode 100644 openssl-1.1.0h/crypto/des/ofb_enc.c

(limited to 'openssl-1.1.0h/crypto/des/ofb_enc.c')

diff --git a/openssl-1.1.0h/crypto/des/ofb_enc.c b/openssl-1.1.0h/crypto/des/ofb_enc.c
new file mode 100644
index 0000000..65a9b86
--- /dev/null
+++ b/openssl-1.1.0h/crypto/des/ofb_enc.c
@@ -0,0 +1,82 @@
+/*
+ * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the OpenSSL license (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
+ */
+
+#include "des_locl.h"
+
+/*
+ * The input and output are loaded in multiples of 8 bits. What this means is
+ * that if you have numbits=12 and length=2 the first 12 bits will be
+ * retrieved from the first byte and half the second.  The second 12 bits
+ * will come from the 3rd and half the 4th byte.
+ */
+void DES_ofb_encrypt(const unsigned char *in, unsigned char *out, int numbits,
+                     long length, DES_key_schedule *schedule,
+                     DES_cblock *ivec)
+{
+    register DES_LONG d0, d1, vv0, vv1, v0, v1, n = (numbits + 7) / 8;
+    register DES_LONG mask0, mask1;
+    register long l = length;
+    register int num = numbits;
+    DES_LONG ti[2];
+    unsigned char *iv;
+
+    if (num > 64)
+        return;
+    if (num > 32) {
+        mask0 = 0xffffffffL;
+        if (num >= 64)
+            mask1 = mask0;
+        else
+            mask1 = (1L << (num - 32)) - 1;
+    } else {
+        if (num == 32)
+            mask0 = 0xffffffffL;
+        else
+            mask0 = (1L << num) - 1;
+        mask1 = 0x00000000L;
+    }
+
+    iv = &(*ivec)[0];
+    c2l(iv, v0);
+    c2l(iv, v1);
+    ti[0] = v0;
+    ti[1] = v1;
+    while (l-- > 0) {
+        ti[0] = v0;
+        ti[1] = v1;
+        DES_encrypt1((DES_LONG *)ti, schedule, DES_ENCRYPT);
+        vv0 = ti[0];
+        vv1 = ti[1];
+        c2ln(in, d0, d1, n);
+        in += n;
+        d0 = (d0 ^ vv0) & mask0;
+        d1 = (d1 ^ vv1) & mask1;
+        l2cn(d0, d1, out, n);
+        out += n;
+
+        if (num == 32) {
+            v0 = v1;
+            v1 = vv0;
+        } else if (num == 64) {
+            v0 = vv0;
+            v1 = vv1;
+        } else if (num > 32) {  /* && num != 64 */
+            v0 = ((v1 >> (num - 32)) | (vv0 << (64 - num))) & 0xffffffffL;
+            v1 = ((vv0 >> (num - 32)) | (vv1 << (64 - num))) & 0xffffffffL;
+        } else {                /* num < 32 */
+
+            v0 = ((v0 >> num) | (v1 << (32 - num))) & 0xffffffffL;
+            v1 = ((v1 >> num) | (vv0 << (32 - num))) & 0xffffffffL;
+        }
+    }
+    iv = &(*ivec)[0];
+    l2c(v0, iv);
+    l2c(v1, iv);
+    v0 = v1 = d0 = d1 = ti[0] = ti[1] = vv0 = vv1 = 0;
+}
-- 
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