Add SHA3 hashing

- added these variants: SHA3-256, SHA3-384, SHA3-512
- reordered also the hashing id's
- added some notes about them in DOC/Hashes.txt

Signed-off-by: Tino Reichardt <milky-7zip@mcmilk.de>

C/hashes/sha512.h

@@ -0,0 +1,74 @@
+
+/*
+ * Taken from lib/crypto/* of samba-4.5.8.tar.gz.
+ *
+ * Copyright (c) 1995 - 2001 Kungliga Tekniska Högskolan
+ * (Royal Institute of Technology, Stockholm, Sweden).
+ * 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. Neither the name of the Institute nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS 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 INSTITUTE OR 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.
+ */
+
+/* $Id$ */
+
+#ifndef HEIM_SHA_H
+#define HEIM_SHA_H 1
+
+#include "hash.h"
+
+/*
+ * SHA-2 512
+ */
+
+#define SHA512_DIGEST_LENGTH 64
+
+struct hc_sha512state {
+  uint64_t sz[2];
+  uint64_t counter[8];
+  unsigned char save[128];
+};
+
+typedef struct hc_sha512state SHA512_CTX;
+
+void SHA512_Init (SHA512_CTX *);
+void SHA512_Update (SHA512_CTX *, const void *, size_t);
+void SHA512_Final (void *, SHA512_CTX *);
+
+/*
+ * SHA-2 384
+ */
+
+#define SHA384_DIGEST_LENGTH 48
+
+typedef struct hc_sha512state SHA384_CTX;
+
+void SHA384_Init (SHA384_CTX *);
+void SHA384_Update (SHA384_CTX *, const void *, size_t);
+void SHA384_Final (void *, SHA384_CTX *);
+
+#endif /* HEIM_SHA_H */