Added module for hashing

GCryptCLI/src/ModuleHashing.cpp

@@ -0,0 +1,53 @@
+#include "ModuleHashing.h"
+#include "DataIngestionLayer.h"
+#include "DataOutputLayer.h"
+#include "KeyManager.h"
+#include <GCrypt/GHash.h>
+
+using namespace Module;
+using namespace Leonetienne::GCrypt;
+
+void Hashing::Run() {
+
+  // Initialize the data ingestion layer
+  IO::DataIngestionLayer::Init();
+
+  // Initialize the data output layer
+  IO::DataOutputLayer::Init();
+
+  // Initialize a ghasher
+  GHash hasher;
+
+  // Read in new blocks, if not reached eof
+  while (!IO::DataIngestionLayer::IsFinished()) {
+    if (!IO::DataIngestionLayer::ReachedEOF()) {
+      IO::DataIngestionLayer::ReadBlock();
+    }
+
+    // Process a block, if one is ready
+    if (IO::DataIngestionLayer::IsBlockReady()) {
+      const Block cleartext = IO::DataIngestionLayer::GetNextBlock();
+      hasher.Digest(cleartext);
+    }
+  }
+
+  // Wait until we've finished digesting all blocks
+  // Enqueue that single block (the hash result) to the output layer
+  IO::DataOutputLayer::Enqueue(hasher.GetHashsum());
+
+  // Tell the data output layer that that was the last block
+  IO::DataOutputLayer::ReachedEOF();
+
+  // Dump it
+  while (!IO::DataOutputLayer::IsFinished()) {
+    IO::DataOutputLayer::WriteBlock();
+  }
+
+  // Destruct the data ingestion layer
+  IO::DataIngestionLayer::Destruct();
+
+  // Destruct the data output layer
+  IO::DataOutputLayer::Destruct();
+
+  return;
+}