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| author | lealem47 <60322859+lealem47@users.noreply.github.com> | 2023-11-12 16:51:31 -0700 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2023-11-13 00:51:31 +0100 |
| commit | 9247ce1bb90c44d19a0069fadb12c0c480ac9b4f (patch) | |
| tree | 66fb4728d502759271d03eba59d51c1a129b2ffb /src/Volume/EncryptionModeWolfCryptXTS.cpp | |
| parent | 458be85f84a097aa829658c50ce41d82791fb6a8 (diff) | |
| download | VeraCrypt-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.cpp | 119 |
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; + } +} |