From 9247ce1bb90c44d19a0069fadb12c0c480ac9b4f Mon Sep 17 00:00:00 2001
From: lealem47 <60322859+lealem47@users.noreply.github.com>
Date: Sun, 12 Nov 2023 16:51:31 -0700
Subject: wolfCrypt as crypto backend for VeraCrypt (#1227)

* wolfCrypt as crypto backend for VeraCrypt

* Refactor to use EncryptionModeWolfCryptXTS class
---
 src/Volume/EncryptionModeWolfCryptXTS.h | 54 +++++++++++++++++++++++++++++++++
 1 file changed, 54 insertions(+)
 create mode 100644 src/Volume/EncryptionModeWolfCryptXTS.h

(limited to 'src/Volume/EncryptionModeWolfCryptXTS.h')

diff --git a/src/Volume/EncryptionModeWolfCryptXTS.h b/src/Volume/EncryptionModeWolfCryptXTS.h
new file mode 100644
index 00000000..e432f768
--- /dev/null
+++ b/src/Volume/EncryptionModeWolfCryptXTS.h
@@ -0,0 +1,54 @@
+/*
+ Derived from source code of TrueCrypt 7.1a, which is
+ Copyright (c) 2008-2012 TrueCrypt Developers Association and which is governed
+ by the TrueCrypt License 3.0.
+
+ Modifications and additions to the original source code (contained in this file)
+ and all other portions of this file are Copyright (c) 2013-2017 IDRIX
+ and are governed by the Apache License 2.0 the full text of which is
+ contained in the file License.txt included in VeraCrypt binary and source
+ code distribution packages.
+*/
+
+#ifndef TC_HEADER_Volume_EncryptionModeWolfCryptXTS
+#define TC_HEADER_Volume_EncryptionModeWolfCryptXTS
+
+#include "Platform/Platform.h"
+#include "EncryptionMode.h"
+
+namespace VeraCrypt
+{
+	class EncryptionModeWolfCryptXTS : public EncryptionMode
+	{
+	public:
+		EncryptionModeWolfCryptXTS () { }
+		virtual ~EncryptionModeWolfCryptXTS () { }
+
+		virtual void Decrypt (byte *data, uint64 length) const;
+		virtual void DecryptSectorsCurrentThread (byte *data, uint64 sectorIndex, uint64 sectorCount, size_t sectorSize) const;
+		virtual void Encrypt (byte *data, uint64 length) const;
+		virtual void EncryptSectorsCurrentThread (byte *data, uint64 sectorIndex, uint64 sectorCount, size_t sectorSize) const;
+		virtual const SecureBuffer &GetKey () const { return SecondaryKey; }
+		virtual size_t GetKeySize () const;
+		virtual wstring GetName () const { return L"XTS"; };
+		virtual shared_ptr <EncryptionMode> GetNew () const { return shared_ptr <EncryptionMode> (new EncryptionModeWolfCryptXTS); }
+		virtual void SetCiphers (const CipherList &ciphers);
+	        virtual void SetKey (const ConstBufferPtr &key);
+
+	protected:
+		void DecryptBuffer (byte *data, uint64 length, uint64 startDataUnitNo) const;
+		void DecryptBufferXTS (Cipher &cipher, const Cipher &secondaryCipher, byte *buffer, uint64 length, uint64 startDataUnitNo, unsigned int startCipherBlockNo) const;
+		void EncryptBuffer (byte *data, uint64 length, uint64 startDataUnitNo) const;
+		void EncryptBufferXTS (Cipher &cipher, const Cipher &secondaryCipher, byte *buffer, uint64 length, uint64 startDataUnitNo, unsigned int startCipherBlockNo) const;
+		void SetSecondaryCipherKeys ();
+
+		SecureBuffer SecondaryKey;
+		CipherList SecondaryCiphers;
+
+	private:
+		EncryptionModeWolfCryptXTS (const EncryptionModeWolfCryptXTS &);
+		EncryptionModeWolfCryptXTS &operator= (const EncryptionModeWolfCryptXTS &);
+	};
+}
+
+#endif // TC_HEADER_Volume_EncryptionModeWolfCryptXTS
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