VeraCrypt - Free Open source disk encryption with strong security for the Paranoid

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Diffstat (limited to 'src/Common/Common.h')

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/* 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. */ #include "Platform/Platform.h" #include "Cipher.h" #include "Crypto/Aes.h" #include "Crypto/SerpentFast.h" #include "Crypto/Twofish.h" #include "Crypto/Camellia.h" #include "Crypto/kuznyechik.h" #ifdef TC_AES_HW_CPU # include "Crypto/Aes_hw_cpu.h" #endif extern "C" int IsAesHwCpuSupported () { #ifdef TC_AES_HW_CPU static bool state = false; static bool stateValid = false; if (!stateValid) { state = HasAESNI() ? true : false; stateValid = true; } return state && VeraCrypt::Cipher::IsHwSupportEnabled(); #else return false; #endif } namespace VeraCrypt { Cipher::Cipher () : Initialized (false) { } Cipher::~Cipher () { } void Cipher::DecryptBlock (byte *data) const { if (!Initialized) throw NotInitialized (SRC_POS); Decrypt (data); } void Cipher::DecryptBlocks (byte *data, size_t blockCount) const { if (!Initialized) throw NotInitialized (SRC_POS); while (blockCount-- > 0) { Decrypt (data); data += GetBlockSize(); } } void Cipher::EncryptBlock (byte *data) const { if (!Initialized) throw NotInitialized (SRC_POS); Encrypt (data); } void Cipher::EncryptBlocks (byte *data, size_t blockCount) const { if (!Initialized) throw NotInitialized (SRC_POS); while (blockCount-- > 0) { Encrypt (data); data += GetBlockSize(); } } CipherList Cipher::GetAvailableCiphers () { CipherList l; l.push_back (shared_ptr <Cipher> (new CipherAES ())); l.push_back (shared_ptr <Cipher> (new CipherSerpent ())); l.push_back (shared_ptr <Cipher> (new CipherTwofish ())); l.push_back (shared_ptr <Cipher> (new CipherCamellia ())); l.push_back (shared_ptr <Cipher> (new CipherKuznyechik ())); return l; } void Cipher::SetKey (const ConstBufferPtr &key) { if (key.Size() != GetKeySize ()) throw ParameterIncorrect (SRC_POS); if (!Initialized) ScheduledKey.Allocate (GetScheduledKeySize ()); SetCipherKey (key); Key.CopyFrom (key); Initialized = true; } #define TC_EXCEPTION(TYPE) TC_SERIALIZER_FACTORY_ADD(TYPE) #undef TC_EXCEPTION_NODECL #define TC_EXCEPTION_NODECL(TYPE) TC_SERIALIZER_FACTORY_ADD(TYPE) TC_SERIALIZER_FACTORY_ADD_EXCEPTION_SET (CipherException); // AES void CipherAES::Decrypt (byte *data) const { #ifdef TC_AES_HW_CPU if (IsHwSupportAvailable()) aes_hw_cpu_decrypt (ScheduledKey.Ptr() + sizeof (aes_encrypt_ctx), data); else #endif aes_decrypt (data, data, (aes_decrypt_ctx *) (ScheduledKey.Ptr() + sizeof (aes_encrypt_ctx))); } void CipherAES::DecryptBlocks (byte *data, size_t blockCount) const { if (!Initialized) throw NotInitialized (SRC_POS); #ifdef TC_AES_HW_CPU if ((blockCount & (32 - 1)) == 0 && IsHwSupportAvailable()) { while (blockCount > 0) { aes_hw_cpu_decrypt_32_blocks (ScheduledKey.Ptr() + sizeof (aes_encrypt_ctx), data); data += 32 * GetBlockSize(); blockCount -= 32; } } else #endif Cipher::DecryptBlocks (data, blockCount); } void CipherAES::Encrypt (byte *data) const { #ifdef TC_AES_HW_CPU if (IsHwSupportAvailable()) aes_hw_cpu_encrypt (ScheduledKey.Ptr(), data); else #endif aes_encrypt (data, data, (aes_encrypt_ctx *) ScheduledKey.Ptr()); } void CipherAES::EncryptBlocks (byte *data, size_t blockCount) const { if (!Initialized) throw NotInitialized (SRC_POS); #ifdef TC_AES_HW_CPU if ((blockCount & (32 - 1)) == 0 && IsHwSupportAvailable()) { while (blockCount > 0) { aes_hw_cpu_encrypt_32_blocks (ScheduledKey.Ptr(), data); data += 32 * GetBlockSize(); blockCount -= 32; } } else #endif Cipher::EncryptBlocks (data, blockCount); } size_t CipherAES::GetScheduledKeySize () const { return sizeof(aes_encrypt_ctx) + sizeof(aes_decrypt_ctx); } bool CipherAES::IsHwSupportAvailable () const { #ifdef TC_AES_HW_CPU static bool state = false; static bool stateValid = false; if (!stateValid) { state = HasAESNI() ? true : false; stateValid = true; } return state && HwSupportEnabled; #else return false; #endif } void CipherAES::SetCipherKey (const byte *key) { if (aes_encrypt_key256 (key, (aes_encrypt_ctx *) ScheduledKey.Ptr()) != EXIT_SUCCESS) throw CipherInitError (SRC_POS); if (aes_decrypt_key256 (key, (aes_decrypt_ctx *) (ScheduledKey.Ptr() + sizeof (aes_encrypt_ctx))) != EXIT_SUCCESS) throw CipherInitError (SRC_POS); } // Serpent void CipherSerpent::Decrypt (byte *data) const { serpent_decrypt (data, data, ScheduledKey); } void CipherSerpent::Encrypt (byte *data) const { serpent_encrypt (data, data, ScheduledKey); } size_t CipherSerpent::GetScheduledKeySize () const { return 140*4; } void CipherSerpent::SetCipherKey (const byte *key) { serpent_set_key (key, ScheduledKey); } void CipherSerpent::EncryptBlocks (byte *data, size_t blockCount) const { if (!Initialized) throw NotInitialized (SRC_POS); #if CRYPTOPP_BOOL_SSE2_INTRINSICS_AVAILABLE && !defined(CRYPTOPP_DISABLE_ASM) if ((blockCount >= 4) && IsHwSupportAvailable()) { serpent_encrypt_blocks (data, data, blockCount, ScheduledKey.Ptr()); } else #endif Cipher::EncryptBlocks (data, blockCount); } void CipherSerpent::DecryptBlocks (byte *data, size_t blockCount) const { if (!Initialized) throw NotInitialized (SRC_POS); #if CRYPTOPP_BOOL_SSE2_INTRINSICS_AVAILABLE && !defined(CRYPTOPP_DISABLE_ASM) if ((blockCount >= 4) && IsHwSupportAvailable()) { serpent_decrypt_blocks (data, data, blockCount, ScheduledKey.Ptr()); } else #endif Cipher::DecryptBlocks (data, blockCount); } bool CipherSerpent::IsHwSupportAvailable () const { #if CRYPTOPP_BOOL_SSE2_INTRINSICS_AVAILABLE static bool state = false; static bool stateValid = false; if (!stateValid) { state = HasSSE2() ? true : false; stateValid = true; } return state; #else return false; #endif } // Twofish void CipherTwofish::Decrypt (byte *data) const { twofish_decrypt ((TwofishInstance *) ScheduledKey.Ptr(), (unsigned int *)data, (unsigned int *)data); } void CipherTwofish::Encrypt (byte *data) const { twofish_encrypt ((TwofishInstance *) ScheduledKey.Ptr(), (unsigned int *)data, (unsigned int *)data); } size_t CipherTwofish::GetScheduledKeySize () const { return TWOFISH_KS; } void CipherTwofish::SetCipherKey (const byte *key) { twofish_set_key ((TwofishInstance *) ScheduledKey.Ptr(), (unsigned int *) key); } void CipherTwofish::EncryptBlocks (byte *data, size_t blockCount) const { if (!Initialized) throw NotInitialized (SRC_POS); #if CRYPTOPP_BOOL_X64 && !defined(CRYPTOPP_DISABLE_ASM) twofish_encrypt_blocks ( (TwofishInstance *) ScheduledKey.Ptr(), data, data, blockCount); #else Cipher::EncryptBlocks (data, blockCount); #endif } void CipherTwofish::DecryptBlocks (byte *data, size_t blockCount) const { if (!Initialized) throw NotInitialized (SRC_POS); #if CRYPTOPP_BOOL_X64 && !defined(CRYPTOPP_DISABLE_ASM) twofish_decrypt_blocks ( (TwofishInstance *) ScheduledKey.Ptr(), data, data, blockCount); #else Cipher::DecryptBlocks (data, blockCount); #endif } bool CipherTwofish::IsHwSupportAvailable () const { #if CRYPTOPP_BOOL_X64 && !defined(CRYPTOPP_DISABLE_ASM) return true; #else return false; #endif } // Camellia void CipherCamellia::Decrypt (byte *data) const { camellia_decrypt (data, data, ScheduledKey.Ptr()); } void CipherCamellia::Encrypt (byte *data) const { camellia_encrypt (data, data, ScheduledKey.Ptr()); } size_t CipherCamellia::GetScheduledKeySize () const { return CAMELLIA_KS; } void CipherCamellia::SetCipherKey (const byte *key) { camellia_set_key (key, ScheduledKey.Ptr()); } void CipherCamellia::EncryptBlocks (byte *data, size_t blockCount) const { if (!Initialized) throw NotInitialized (SRC_POS); #if CRYPTOPP_BOOL_X64 && !defined(CRYPTOPP_DISABLE_ASM) camellia_encrypt_blocks ( ScheduledKey.Ptr(), data, data, blockCount); #else Cipher::EncryptBlocks (data, blockCount); #endif } void CipherCamellia::DecryptBlocks (byte *data, size_t blockCount) const { if (!Initialized) throw NotInitialized (SRC_POS); #if CRYPTOPP_BOOL_X64 && !defined(CRYPTOPP_DISABLE_ASM) camellia_decrypt_blocks ( ScheduledKey.Ptr(), data, data, blockCount); #else Cipher::DecryptBlocks (data, blockCount); #endif } bool CipherCamellia::IsHwSupportAvailable () const { #if CRYPTOPP_BOOL_X64 && !defined(CRYPTOPP_DISABLE_ASM) return true; #else return false; #endif } // Kuznyechik void CipherKuznyechik::Decrypt (byte *data) const { kuznyechik_decrypt_block (data, data, (kuznyechik_kds *) ScheduledKey.Ptr()); } void CipherKuznyechik::Encrypt (byte *data) const { kuznyechik_encrypt_block (data, data, (kuznyechik_kds *) ScheduledKey.Ptr()); } size_t CipherKuznyechik::GetScheduledKeySize () const { return KUZNYECHIK_KS; } void CipherKuznyechik::SetCipherKey (const byte *key) { kuznyechik_set_key (key, (kuznyechik_kds *) ScheduledKey.Ptr()); } void CipherKuznyechik::EncryptBlocks (byte *data, size_t blockCount) const { if (!Initialized) throw NotInitialized (SRC_POS); #if CRYPTOPP_BOOL_SSE2_INTRINSICS_AVAILABLE if ((blockCount >= 4) && IsHwSupportAvailable()) { kuznyechik_encrypt_blocks (data, data, blockCount, (kuznyechik_kds *) ScheduledKey.Ptr()); } else #endif Cipher::EncryptBlocks (data, blockCount); } void CipherKuznyechik::DecryptBlocks (byte *data, size_t blockCount) const { if (!Initialized) throw NotInitialized (SRC_POS); #if CRYPTOPP_BOOL_SSE2_INTRINSICS_AVAILABLE if ((blockCount >= 4) && IsHwSupportAvailable()) { kuznyechik_decrypt_blocks (data, data, blockCount, (kuznyechik_kds *) ScheduledKey.Ptr()); } else #endif Cipher::DecryptBlocks (data, blockCount); } bool CipherKuznyechik::IsHwSupportAvailable () const { #if CRYPTOPP_BOOL_SSE2_INTRINSICS_AVAILABLE static bool state = false; static bool stateValid = false; if (!stateValid) { state = HasSSE2() ? true : false; stateValid = true; } return state; #else return false; #endif } bool Cipher::HwSupportEnabled = true; }


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