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+/*
+ BLAKE2 reference source code package - b2sum tool
+
+ Copyright 2012, Samuel Neves <sneves@dei.uc.pt>. You may use this under the
+ terms of the CC0, the OpenSSL Licence, or the Apache Public License 2.0, at
+ your option. The terms of these licenses can be found at:
+
+ - CC0 1.0 Universal : http://creativecommons.org/publicdomain/zero/1.0
+ - OpenSSL license : https://www.openssl.org/source/license.html
+ - Apache 2.0 : http://www.apache.org/licenses/LICENSE-2.0
+
+ More information about the BLAKE2 hash function can be found at
+ https://blake2.net.
+*/
+
+int blake2b_stream( FILE *stream, void *resstream, size_t outbytes );
+typedef int ( *blake2fn )( FILE *, void *, size_t );
+#define BLAKE2S_OUTBYTES 32
+#define BLAKE2B_OUTBYTES 64