Renamed class Hasher to GHash

GCryptLib/include/GCrypt/GHash.h

@@ -0,0 +1,37 @@
+#ifndef GCRYPT_GHASH_H
+#define GCRYPT_GHASH_H
+
+#include "GCrypt/Flexblock.h"
+#include "GCrypt/Block.h"
+#include "GCrypt/GCipher.h"
+
+namespace Leonetienne::GCrypt {
+  /** This class implements a hash function, based on the GCrypt cipher
+  */
+  class GHash {
+  public:
+    GHash();
+
+    //! Will add the hash value of the block `data` to the hashsum.
+    //! WARNING: If you compute hashes using this digestive method,
+    //! you REALLY REALLY should add a trailing block just containing the cleartext size!
+    //! You MOST LIKELY just want to use the wrapper function GHash::CalculateHashsum(Flexblock const&) instead!
+    void DigestBlock(const Block& data);
+
+    //! Will return the current hashsum
+    const Block& GetHashsum() const;
+
+    //! Will calculate a hashsum for `data`.
+    static Block CalculateHashsum(const Flexblock& data);
+
+  private:
+    //! The cipher to use
+    GCipher cipher;
+
+    //! The current state of the hashsum
+    Block block;
+  };
+}
+
+#endif
+