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+/***************************************************************************
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+ * _ _ ____ _
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+ * Project ___| | | | _ \| |
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+ * / __| | | | |_) | |
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+ * | (__| |_| | _ <| |___
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+ * \___|\___/|_| \_\_____|
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+ *
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+ * Copyright (C) 2015, Steve Holme, <steve_holme@hotmail.com>.
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+ *
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+ * This software is licensed as described in the file COPYING, which
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+ * you should have received as part of this distribution. The terms
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+ * are also available at http://curl.haxx.se/docs/copyright.html.
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+ *
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+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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+ * copies of the Software, and permit persons to whom the Software is
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+ * furnished to do so, under the terms of the COPYING file.
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+ *
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+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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+ * KIND, either express or implied.
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+ *
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+ ***************************************************************************/
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+
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+#include "curl_setup.h"
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+
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+#if defined(USE_NTLM) && (!defined(USE_SSLEAY) || defined(HAVE_BORINGSSL))
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+
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+#include "curl_des.h"
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+
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+/*
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+ * Curl_des_set_odd_parity()
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+ *
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+ * This is used to apply odd parity to the given byte array. It is typically
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+ * used by when a cryptography engines doesn't have it's own version.
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+ *
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+ * The function is a port of the Java based oddParity() function over at:
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+ *
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+ * http://davenport.sourceforge.net/ntlm.html
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+ *
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+ * Parameters:
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+ *
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+ * bytes [in/out] - The data whose parity bits are to be adjusted for
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+ * odd parity.
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+ * len [out] - The length of the data.
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+ */
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+void Curl_des_set_odd_parity(unsigned char *bytes, size_t len)
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+{
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+ size_t i;
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+
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+ for(i = 0; i < len; i++) {
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+ unsigned char b = bytes[i];
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+
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+ bool needs_parity = (((b >> 7) ^ (b >> 6) ^ (b >> 5) ^
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+ (b >> 4) ^ (b >> 3) ^ (b >> 2) ^
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+ (b >> 1)) & 0x01) == 0;
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+
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+ if(needs_parity)
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+ bytes[i] |= 0x01;
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+ else
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+ bytes[i] &= 0xfe;
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+ }
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+}
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+
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+#endif /* USE_NTLM && (!USE_SSLEAY || HAVE_BORINGSSL) */
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Steve Holme