Add Chromium-only Blender WebEngine parity work

blender-5.2.0/intern/cycles/util/md5.h

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+/* SPDX-FileCopyrightText: 1999, 2002 Aladdin Enterprises. All rights reserved.
+ *
+ * SPDX-License-Identifier: Zlib
+ *
+ * By `L. Peter Deutsch <ghost@aladdin.com>`. */
+
+/* MD5
+ *
+ * Simply MD5 hash computation, used by disk cache. Adapted from external
+ * code, with minor code modifications done to remove some unused code and
+ * change code style. */
+
+#pragma once
+
+#include "util/string.h"
+
+CCL_NAMESPACE_BEGIN
+
+class MD5Hash {
+ public:
+  MD5Hash();
+  ~MD5Hash();
+
+  void append(const uint8_t *data, const int nbytes);
+  void append(const string &str);
+  bool append_file(const string &filepath);
+  string get_hex();
+
+ protected:
+  void process(const uint8_t *data);
+  void finish(uint8_t digest[16]);
+
+  uint32_t count[2]; /* message length in bits, LSW first. */
+  uint32_t abcd[4];  /* digest buffer */
+  uint8_t buf[64];   /* accumulate block */
+};
+
+string util_md5_string(const string &str);
+
+CCL_NAMESPACE_END