VeraCrypt
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authorlealem47 <60322859+lealem47@users.noreply.github.com>2023-11-12 16:51:31 -0700
committerGitHub <noreply@github.com>2023-11-13 00:51:31 +0100
commit9247ce1bb90c44d19a0069fadb12c0c480ac9b4f (patch)
tree66fb4728d502759271d03eba59d51c1a129b2ffb /src/Volume/EncryptionModeWolfCryptXTS.cpp
parent458be85f84a097aa829658c50ce41d82791fb6a8 (diff)
downloadVeraCrypt-9247ce1bb90c44d19a0069fadb12c0c480ac9b4f.tar.gz
VeraCrypt-9247ce1bb90c44d19a0069fadb12c0c480ac9b4f.zip
wolfCrypt as crypto backend for VeraCrypt (#1227)
* wolfCrypt as crypto backend for VeraCrypt * Refactor to use EncryptionModeWolfCryptXTS class
Diffstat (limited to 'src/Volume/EncryptionModeWolfCryptXTS.cpp')
-rw-r--r--src/Volume/EncryptionModeWolfCryptXTS.cpp119
1 files changed, 119 insertions, 0 deletions
diff --git a/src/Volume/EncryptionModeWolfCryptXTS.cpp b/src/Volume/EncryptionModeWolfCryptXTS.cpp
new file mode 100644
index 00000000..891f6007
--- /dev/null
+++ b/src/Volume/EncryptionModeWolfCryptXTS.cpp
@@ -0,0 +1,119 @@
+
+#include "Crypto/cpu.h"
+#include "Crypto/misc.h"
+#include "EncryptionModeWolfCryptXTS.h"
+#include "Common/Crypto.h"
+
+namespace VeraCrypt
+{
+ void EncryptionModeWolfCryptXTS::Encrypt (byte *data, uint64 length) const
+ {
+ EncryptBuffer (data, length, 0);
+ }
+
+ void EncryptionModeWolfCryptXTS::EncryptBuffer (byte *data, uint64 length, uint64 startDataUnitNo) const
+ {
+ if_debug (ValidateState());
+
+ CipherList::const_iterator iSecondaryCipher = SecondaryCiphers.begin();
+
+ for (CipherList::const_iterator iCipher = Ciphers.begin(); iCipher != Ciphers.end(); ++iCipher)
+ {
+ EncryptBufferXTS (**iCipher, **iSecondaryCipher, data, length, startDataUnitNo, 0);
+ ++iSecondaryCipher;
+ }
+
+ assert (iSecondaryCipher == SecondaryCiphers.end());
+ }
+
+ void EncryptionModeWolfCryptXTS::EncryptBufferXTS (Cipher &cipher, const Cipher &secondaryCipher, byte *buffer, uint64 length, uint64 startDataUnitNo, unsigned int startCipherBlockNo) const
+ {
+ cipher.EncryptBlockXTS(buffer, length, startDataUnitNo);
+ }
+
+ void EncryptionModeWolfCryptXTS::EncryptSectorsCurrentThread (byte *data, uint64 sectorIndex, uint64 sectorCount, size_t sectorSize) const
+ {
+ EncryptBuffer (data, sectorCount * sectorSize, sectorIndex * sectorSize / ENCRYPTION_DATA_UNIT_SIZE);
+ }
+
+ size_t EncryptionModeWolfCryptXTS::GetKeySize () const
+ {
+ if (Ciphers.empty())
+ throw NotInitialized (SRC_POS);
+
+ size_t keySize = 0;
+ foreach_ref (const Cipher &cipher, SecondaryCiphers)
+ {
+ keySize += cipher.GetKeySize();
+ }
+
+ return keySize;
+ }
+
+ void EncryptionModeWolfCryptXTS::Decrypt (byte *data, uint64 length) const
+ {
+ DecryptBuffer (data, length, 0);
+ }
+
+ void EncryptionModeWolfCryptXTS::DecryptBuffer (byte *data, uint64 length, uint64 startDataUnitNo) const
+ {
+ if_debug (ValidateState());
+
+ CipherList::const_iterator iSecondaryCipher = SecondaryCiphers.end();
+
+ for (CipherList::const_reverse_iterator iCipher = Ciphers.rbegin(); iCipher != Ciphers.rend(); ++iCipher)
+ {
+ --iSecondaryCipher;
+ DecryptBufferXTS (**iCipher, **iSecondaryCipher, data, length, startDataUnitNo, 0);
+ }
+
+ assert (iSecondaryCipher == SecondaryCiphers.begin());
+ }
+
+ void EncryptionModeWolfCryptXTS::DecryptBufferXTS (Cipher &cipher, const Cipher &secondaryCipher, byte *buffer, uint64 length, uint64 startDataUnitNo, unsigned int startCipherBlockNo) const
+ {
+ cipher.DecryptBlockXTS(buffer, length, startDataUnitNo);
+ }
+
+ void EncryptionModeWolfCryptXTS::DecryptSectorsCurrentThread (byte *data, uint64 sectorIndex, uint64 sectorCount, size_t sectorSize) const
+ {
+ DecryptBuffer (data, sectorCount * sectorSize, sectorIndex * sectorSize / ENCRYPTION_DATA_UNIT_SIZE);
+ }
+
+ void EncryptionModeWolfCryptXTS::SetCiphers (const CipherList &ciphers)
+ {
+ EncryptionMode::SetCiphers (ciphers);
+
+ SecondaryCiphers.clear();
+
+ foreach_ref (const Cipher &cipher, ciphers)
+ {
+ SecondaryCiphers.push_back (cipher.GetNew());
+ }
+
+ if (SecondaryKey.Size() > 0)
+ SetSecondaryCipherKeys();
+ }
+
+ void EncryptionModeWolfCryptXTS::SetKey (const ConstBufferPtr &key)
+ {
+ SecondaryKey.Allocate (key.Size());
+ SecondaryKey.CopyFrom (key);
+
+ if (!SecondaryCiphers.empty())
+ SetSecondaryCipherKeys();
+
+ }
+
+ void EncryptionModeWolfCryptXTS::SetSecondaryCipherKeys ()
+ {
+ size_t keyOffset = 0;
+ foreach_ref (Cipher &cipher, SecondaryCiphers)
+ {
+ cipher.SetKeyXTS (SecondaryKey.GetRange (keyOffset, cipher.GetKeySize()));
+ keyOffset += cipher.GetKeySize();
+ }
+
+ KeySet = true;
+ }
+}