/* Legal Notice: Some portions of the source code contained in this file were derived from the source code of Encryption for the Masses 2.02a, which is Copyright (c) 1998-2000 Paul Le Roux and which is governed by the 'License Agreement for Encryption for the Masses'. Modifications and additions to the original source code (contained in this file) and all other portions of this file are Copyright (c) 2003-2010 TrueCrypt Developers Association and are governed by the TrueCrypt License 3.0 the full text of which is contained in the file License.txt included in TrueCrypt binary and source code distribution packages. */ #include "Tcdefs.h" #include "Crypto.h" #include "Xts.h" #include "Crc.h" #include "Common/Endian.h" #include #ifndef TC_WINDOWS_BOOT #include "EncryptionThreadPool.h" #endif #include "Volumes.h" /* Update the following when adding a new cipher or EA: Crypto.h: ID #define MAX_EXPANDED_KEY #define Crypto.c: Ciphers[] EncryptionAlgorithms[] CipherInit() EncipherBlock() DecipherBlock() */ #ifndef TC_WINDOWS_BOOT_SINGLE_CIPHER_MODE // Cipher configuration static Cipher Ciphers[] = { // Block Size Key Size Key Schedule Size // ID Name (Bytes) (Bytes) (Bytes) { AES, "AES", 16, 32, AES_KS }, { SERPENT, "Serpent", 16, 32, 140*4 }, { TWOFISH, "Twofish", 16, 32, TWOFISH_KS }, { 0, 0, 0, 0, 0 } }; // Encryption algorithm configuration static EncryptionAlgorithm EncryptionAlgorithms[] = { // Cipher(s) Modes FormatEnabled #ifndef TC_WINDOWS_BOOT { { 0, 0 }, { 0, 0}, 0 }, // Must be all-zero { { AES, 0 }, { XTS, 0 }, 1 }, { { SERPENT, 0 }, { XTS, 0 }, 1 }, { { TWOFISH, 0 }, { XTS, 0 }, 1 }, { { TWOFISH, AES, 0 }, { XTS, 0 }, 1 }, { { SERPENT, TWOFISH, AES, 0 }, { XTS, 0 }, 1 }, { { AES, SERPENT, 0 }, { XTS, 0 }, 1 }, { { AES, TWOFISH, SERPENT, 0 }, { XTS, 0 }, 1 }, { { SERPENT, TWOFISH, 0 }, { XTS, 0 }, 1 }, { { 0, 0 }, { 0, 0}, 0 } // Must be all-zero #else // TC_WINDOWS_BOOT // Encryption algorithms available for boot drive encryption { { 0, 0 }, { 0, 0 }, 0 }, // Must be all-zero { { AES, 0 }, { XTS, 0 }, 1 }, { { SERPENT, 0 }, { XTS, 0 }, 1 }, { { TWOFISH, 0 }, { XTS, 0 }, 1 }, { { TWOFISH, AES, 0 }, { XTS, 0 }, 1 }, { { SERPENT, TWOFISH, AES, 0 }, { XTS, 0 }, 1 }, { { AES, SERPENT, 0 }, { XTS, 0 }, 1 }, { { AES, TWOFISH, SERPENT, 0 }, { XTS, 0 }, 1 }, { { SERPENT, TWOFISH, 0 }, { XTS, 0 }, 1 }, { { 0, 0 }, { 0, 0 }, 0 }, // Must be all-zero #endif }; // Hash algorithms static Hash Hashes[] = { // ID Name Deprecated System Encryption #ifndef TC_WINDOWS_BOOT { SHA512, "SHA-512", FALSE, FALSE }, { WHIRLPOOL, "Whirlpool", FALSE, FALSE }, #endif { SHA256, "SHA-256", FALSE, TRUE }, { RIPEMD160, "RIPEMD-160", TRUE, TRUE }, { 0, 0, 0 } }; /* Return values: 0 = success, ERR_CIPHER_INIT_FAILURE (fatal), ERR_CIPHER_INIT_WEAK_KEY (non-fatal) */ int CipherInit (int cipher, unsigned char *key, unsigned __int8 *ks) { int retVal = ERR_SUCCESS; switch (cipher) { case AES: #ifndef TC_WINDOWS_BOOT if (aes_encrypt_key256 (key, (aes_encrypt_ctx *) ks) != EXIT_SUCCESS) return ERR_CIPHER_INIT_FAILURE; if (aes_decrypt_key256 (key, (aes_decrypt_ctx *) (ks + sizeof(aes_encrypt_ctx))) != EXIT_SUCCESS) return ERR_CIPHER_INIT_FAILURE; #else if (aes_set_key (key, (length_type) CipherGetKeySize(AES), (aes_context *) ks) != 0) return ERR_CIPHER_INIT_FAILURE; #endif break; case SERPENT: serpent_set_key (key, ks); break; case TWOFISH: twofish_set_key ((TwofishInstance *)ks, (const u4byte *)key); break; default: // Unknown/wrong cipher ID return ERR_CIPHER_INIT_FAILURE; } return retVal; } void EncipherBlock(int cipher, void *data, void *ks) { switch (cipher) { case AES: // In 32-bit kernel mode, due to KeSaveFloatingPointState() overhead, AES instructions can be used only when processing the whole data unit. #if (defined (_WIN64) || !defined (TC_WINDOWS_DRIVER)) && !defined (TC_WINDOWS_BOOT) if (IsAesHwCpuSupported()) aes_hw_cpu_encrypt (ks, data); else #endif aes_encrypt (data, data, ks); break; case TWOFISH: twofish_encrypt (ks, data, data); break; case SERPENT: serpent_encrypt (data, data, ks); break; default: TC_THROW_FATAL_EXCEPTION; // Unknown/wrong ID } } #ifndef TC_WINDOWS_BOOT void EncipherBlocks (int cipher, void *dataPtr, void *ks, size_t blockCount) { byte *data = dataPtr; #if defined (TC_WINDOWS_DRIVER) && !defined (_WIN64) KFLOATING_SAVE floatingPointState; #endif if (cipher == AES && (blockCount & (32 - 1)) == 0 && IsAesHwCpuSupported() #if defined (TC_WINDOWS_DRIVER) && !defined (_WIN64) && NT_SUCCESS (KeSaveFloatingPointState (&floatingPointState)) #endif ) { while (blockCount > 0) { aes_hw_cpu_encrypt_32_blocks (ks, data); data += 32 * 16; blockCount -= 32; } #if defined (TC_WINDOWS_DRIVER) && !defined (_WIN64) KeRestoreFloatingPointState (&floatingPointState); #endif } else { size_t blockSize = CipherGetBlockSize (cipher); while (blockCount-- > 0) { EncipherBlock (cipher, data, ks); data += blockSize; } } } #endif // !TC_WINDOWS_BOOT void DecipherBlock(int cipher, void *data, void *ks) { switch (cipher) { case SERPENT: serpent_decrypt (data, data, ks); break; case TWOFISH: twofish_decrypt (ks, data, data); break; #ifndef TC_WINDOWS_BOOT case AES: #if defined (_WIN64) || !defined (TC_WINDOWS_DRIVER) if (IsAesHwCpuSupported()) aes_hw_cpu_decrypt ((byte *) ks + sizeof (aes_encrypt_ctx), data); else #endif aes_decrypt (data, data, (void *) ((char *) ks + sizeof(aes_encrypt_ctx))); break; #else case AES: aes_decrypt (data, data, ks); break; #endif default: TC_THROW_FATAL_EXCEPTION; // Unknown/wrong ID } } #ifndef TC_WINDOWS_BOOT void DecipherBlocks (int cipher, void *dataPtr, void *ks, size_t blockCount) { byte *data = dataPtr; #if defined (TC_WINDOWS_DRIVER) && !defined (_WIN64) KFLOATING_SAVE floatingPointState; #endif if (cipher == AES && (blockCount & (32 - 1)) == 0 && IsAesHwCpuSupported() #if defined (TC_WINDOWS_DRIVER) && !defined (_WIN64) && NT_SUCCESS (KeSaveFloatingPointState (&floatingPointState)) #endif ) { while (blockCount > 0) { aes_hw_cpu_decrypt_32_blocks ((byte *) ks + sizeof (aes_encrypt_ctx), data); data += 32 * 16; blockCount -= 32; } #if defined (TC_WINDOWS_DRIVER) && !defined (_WIN64) KeRestoreFloatingPointState (&floatingPointState); #endif } else { size_t blockSize = CipherGetBlockSize (cipher); while (blockCount-- > 0) { DecipherBlock (cipher, data, ks); data += blockSize; } } } #endif // !TC_WINDOWS_BOOT // Ciphers support Cipher *CipherGet (int id) { int i; for (i = 0; Ciphers[i].Id != 0; i++) if (Ciphers[i].Id == id) return &Ciphers[i]; return NULL; } #ifndef TC_WINDOWS_BOOT const #endif char *CipherGetName (int cipherId) { #ifdef TC_WINDOWS_BOOT return CipherGet (cipherId) -> Name; #else Cipher* pCipher = CipherGet (cipherId); return pCipher? pCipher -> Name : ""; #endif } int CipherGetBlockSize (int cipherId) { #ifdef TC_WINDOWS_BOOT return CipherGet (cipherId) -> BlockSize; #else Cipher* pCipher = CipherGet (cipherId); return pCipher? pCipher -> BlockSize : 0; #endif } int CipherGetKeySize (int cipherId) { #ifdef TC_WINDOWS_BOOT return CipherGet (cipherId) -> KeySize; #else Cipher* pCipher = CipherGet (cipherId); return pCipher? pCipher -> KeySize : 0; #endif } int CipherGetKeyScheduleSize (int cipherId) { #ifdef TC_WINDOWS_BOOT return CipherGet (cipherId) -> KeyScheduleSize; #else Cipher* pCipher = CipherGet (cipherId); return pCipher? pCipher -> KeyScheduleSize : 0; #endif } #ifndef TC_WINDOWS_BOOT BOOL CipherSupportsIntraDataUnitParallelization (int cipher) { return cipher == AES && IsAesHwCpuSupported(); } #endif // Encryption algorithms support int EAGetFirst () { return 1; } // Returns number of EAs int EAGetCount (void) { int ea, count = 0; for (ea = EAGetFirst (); ea != 0; ea = EAGetNext (ea)) { count++; } return count; } int EAGetNext (int previousEA) { int id = previousEA + 1; if (EncryptionAlgorithms[id].Ciphers[0] != 0) return id; return 0; } // Return values: 0 = success, ERR_CIPHER_INIT_FAILURE (fatal), ERR_CIPHER_INIT_WEAK_KEY (non-fatal) int EAInit (int ea, unsigned char *key, unsigned __int8 *ks) { int c, retVal = ERR_SUCCESS; if (ea == 0) return ERR_CIPHER_INIT_FAILURE; for (c = EAGetFirstCipher (ea); c != 0; c = EAGetNextCipher (ea, c)) { switch (CipherInit (c, key, ks)) { case ERR_CIPHER_INIT_FAILURE: return ERR_CIPHER_INIT_FAILURE; case ERR_CIPHER_INIT_WEAK_KEY: retVal = ERR_CIPHER_INIT_WEAK_KEY; // Non-fatal error break; } key += CipherGetKeySize (c); ks += CipherGetKeyScheduleSize (c); } return retVal; } #ifndef TC_WINDOWS_BOOT BOOL EAInitMode (PCRYPTO_INFO ci) { switch (ci->mode) { case XTS: // Secondary key schedule if (EAInit (ci->ea, ci->k2, ci->ks2) != ERR_SUCCESS) return FALSE; /* Note: XTS mode could potentially be initialized with a weak key causing all blocks in one data unit on the volume to be tweaked with zero tweaks (i.e. 512 bytes of the volume would be encrypted in ECB mode). However, to create a TrueCrypt volume with such a weak key, each human being on Earth would have to create approximately 11,378,125,361,078,862 (about eleven quadrillion) TrueCrypt volumes (provided that the size of each of the volumes is 1024 terabytes). */ break; default: // Unknown/wrong ID TC_THROW_FATAL_EXCEPTION; } return TRUE; } static void EAGetDisplayName(char *buf, int ea, int i) { strcpy (buf, CipherGetName (i)); if (i = EAGetPreviousCipher(ea, i)) { strcat (buf, "("); EAGetDisplayName (&buf[strlen(buf)], ea, i); strcat (buf, ")"); } } // Returns name of EA, cascaded cipher names are separated by hyphens char *EAGetName (char *buf, int ea, int guiDisplay) { if (guiDisplay) { EAGetDisplayName (buf, ea, EAGetLastCipher(ea)); } else { int i = EAGetLastCipher(ea); strcpy (buf, (i != 0) ? CipherGetName (i) : "?"); while (i = EAGetPreviousCipher(ea, i)) { strcat (buf, "-"); strcat (buf, CipherGetName (i)); } } return buf; } int EAGetByName (char *name) { int ea = EAGetFirst (); char n[128]; do { EAGetName (n, ea, 0); if (strcmp (n, name) == 0) return ea; } while (ea = EAGetNext (ea)); return 0; } #endif // TC_WINDOWS_BOOT // Returns sum of key sizes of all ciphers of the EA (in bytes) int EAGetKeySize (int ea) { int i = EAGetFirstCipher (ea); int size = CipherGetKeySize (i); while (i = EAGetNextCipher (ea, i)) { size += CipherGetKeySize (i); } return size; } // Returns the first mode of operation of EA int EAGetFirstMode (int ea) { return (EncryptionAlgorithms[ea].Modes[0]); } int EAGetNextMode (int ea, int previousModeId) { int c, i = 0; while (c = EncryptionAlgorithms[ea].Modes[i++]) { if (c == previousModeId) return EncryptionAlgorithms[ea].Modes[i]; } return 0; } #ifndef TC_WINDOWS_BOOT // Returns the name of the mode of operation of the whole EA char *EAGetModeName (int ea, int mode, BOOL capitalLetters) { switch (mode) { case XTS: return "XTS"; } return "[unknown]"; } #endif // TC_WINDOWS_BOOT // Returns sum of key schedule sizes of all ciphers of the EA int EAGetKeyScheduleSize (int ea) { int i = EAGetFirstCipher(ea); int size = CipherGetKeyScheduleSize (i); while (i = EAGetNextCipher(ea, i)) { size += CipherGetKeyScheduleSize (i); } return size; } // Returns the largest key size needed by an EA for the specified mode of operation int EAGetLargestKeyForMode (int mode) { int ea, key = 0; for (ea = EAGetFirst (); ea != 0; ea = EAGetNext (ea)) { if (!EAIsModeSupported (ea, mode)) continue; if (EAGetKeySize (ea) >= key) key = EAGetKeySize (ea); } return key; } // Returns the largest key needed by any EA for any mode int EAGetLargestKey () { int ea, key = 0; for (ea = EAGetFirst (); ea != 0; ea = EAGetNext (ea)) { if (EAGetKeySize (ea) >= key) key = EAGetKeySize (ea); } return key; } // Returns number of ciphers in EA int EAGetCipherCount (int ea) { int i = 0; while (EncryptionAlgorithms[ea].Ciphers[i++]); return i - 1; } int EAGetFirstCipher (int ea) { return EncryptionAlgorithms[ea].Ciphers[0]; } int EAGetLastCipher (int ea) { int c, i = 0; while (c = EncryptionAlgorithms[ea].Ciphers[i++]); return EncryptionAlgorithms[ea].Ciphers[i - 2]; } int EAGetNextCipher (int ea, int previousCipherId) { int c, i = 0; while (c = EncryptionAlgorithms[ea].Ciphers[i++]) { if (c == previousCipherId) return EncryptionAlgorithms[ea].Ciphers[i]; } return 0; } int EAGetPreviousCipher (int ea, int previousCipherId) { int c, i = 0; if (EncryptionAlgorithms[ea].Ciphers[i++] == previousCipherId) return 0; while (c = EncryptionAlgorithms[ea].Ciphers[i++]) { if (c == previousCipherId) return EncryptionAlgorithms[ea].Ciphers[i - 2]; } return 0; } int EAIsFormatEnabled (int ea) { return EncryptionAlgorithms[ea].FormatEnabled; } // Returns TRUE if the mode of operation is supported for the encryption algorithm BOOL EAIsModeSupported (int ea, int testedMode) { int mode; for (mode = EAGetFirstMode (ea); mode != 0; mode = EAGetNextMode (ea, mode)) { if (mode == testedMode) return TRUE; } return FALSE; } Hash *HashGet (int id) { int i; for (i = 0; Hashes[i].Id != 0; i++) if (Hashes[i].Id == id) return &Hashes[i]; return 0; } int HashGetIdByName (char *name) { int i; for (i = 0; Hashes[i].Id != 0; i++) if (strcmp (Hashes[i].Name, name) == 0) return Hashes[i].Id; return 0; } #ifndef TC_WINDOWS_BOOT const #endif char *HashGetName (int hashId) { #ifdef TC_WINDOWS_BOOT return HashGet(hashId) -> Name; #else Hash* pHash = HashGet(hashId); return pHash? pHash -> Name : ""; #endif } #ifndef TC_WINDOWS_BOOT void HashGetName2 (char *buf, int hashId) { Hash* pHash = HashGet(hashId); if (pHash) strcpy(buf, pHash -> Name); else buf[0] = '\0'; } BOOL HashIsDeprecated (int hashId) { Hash* pHash = HashGet(hashId); return pHash? pHash -> Deprecated : FALSE; } BOOL HashForSystemEncryption (int hashId) { Hash* pHash = HashGet(hashId); return pHash? pHash -> SystemEncryption : FALSE; } // Returns the maximum number of bytes necessary to be generated by the PBKDF2 (PKCS #5) int GetMaxPkcs5OutSize (void) { int size = 32; size = max (size, EAGetLargestKeyForMode (XTS) * 2); // Sizes of primary + secondary keys return size; } #endif #endif // TC_WINDOWS_BOOT_SINGLE_CIPHER_MODE #ifdef TC_WINDOWS_BOOT static byte CryptoInfoBufferInUse = 0; CRYPTO_INFO CryptoInfoBuffer; #endif PCRYPTO_INFO crypto_open () { #ifndef TC_WINDOWS_BOOT /* Do the crt allocation */ PCRYPTO_INFO cryptoInfo = (PCRYPTO_INFO) TCalloc (sizeof (CRYPTO_INFO)); if (cryptoInfo == NULL) return NULL; memset (cryptoInfo, 0, sizeof (CRYPTO_INFO)); #ifndef DEVICE_DRIVER VirtualLock (cryptoInfo, sizeof (CRYPTO_INFO)); #endif cryptoInfo->ea = -1; return cryptoInfo; #else // TC_WINDOWS_BOOT #if 0 if (CryptoInfoBufferInUse) TC_THROW_FATAL_EXCEPTION; #endif CryptoInfoBufferInUse = 1; return &CryptoInfoBuffer; #endif // TC_WINDOWS_BOOT } void crypto_loadkey (PKEY_INFO keyInfo, char *lpszUserKey, int nUserKeyLen) { keyInfo->keyLength = nUserKeyLen; burn (keyInfo->userKey, sizeof (keyInfo->userKey)); memcpy (keyInfo->userKey, lpszUserKey, nUserKeyLen); } void crypto_close (PCRYPTO_INFO cryptoInfo) { #ifndef TC_WINDOWS_BOOT if (cryptoInfo != NULL) { burn (cryptoInfo, sizeof (CRYPTO_INFO)); #ifndef DEVICE_DRIVER VirtualUnlock (cryptoInfo, sizeof (CRYPTO_INFO)); #endif TCfree (cryptoInfo); } #else // TC_WINDOWS_BOOT burn (&CryptoInfoBuffer, sizeof (CryptoInfoBuffer)); CryptoInfoBufferInUse = FALSE; #endif // TC_WINDOWS_BOOT } #ifndef TC_WINDOWS_BOOT_SINGLE_CIPHER_MODE // EncryptBuffer // // buf: data to be encrypted; the start of the buffer is assumed to be aligned with the start of a data unit. // len: number of bytes to encrypt; must be divisible by the block size (for cascaded ciphers, divisible // by the largest block size used within the cascade) void EncryptBuffer (unsigned __int8 *buf, TC_LARGEST_COMPILER_UINT len, PCRYPTO_INFO cryptoInfo) { switch (cryptoInfo->mode) { case XTS: { unsigned __int8 *ks = cryptoInfo->ks; unsigned __int8 *ks2 = cryptoInfo->ks2; UINT64_STRUCT dataUnitNo; int cipher; // When encrypting/decrypting a buffer (typically a volume header) the sequential number // of the first XTS data unit in the buffer is always 0 and the start of the buffer is // always assumed to be aligned with the start of a data unit. dataUnitNo.LowPart = 0; dataUnitNo.HighPart = 0; for (cipher = EAGetFirstCipher (cryptoInfo->ea); cipher != 0; cipher = EAGetNextCipher (cryptoInfo->ea, cipher)) { EncryptBufferXTS (buf, len, &dataUnitNo, 0, ks, ks2, cipher); ks += CipherGetKeyScheduleSize (cipher); ks2 += CipherGetKeyScheduleSize (cipher); } } break; default: // Unknown/wrong ID TC_THROW_FATAL_EXCEPTION; } } // buf: data to be encrypted // unitNo: sequential number of the data unit with which the buffer starts // nbrUnits: number of data units in the buffer void EncryptDataUnits (unsigned __int8 *buf, const UINT64_STRUCT *structUnitNo, uint32 nbrUnits, PCRYPTO_INFO ci) #ifndef TC_WINDOWS_BOOT { EncryptionThreadPoolDoWork (EncryptDataUnitsWork, buf, structUnitNo, nbrUnits, ci); } void EncryptDataUnitsCurrentThread (unsigned __int8 *buf, const UINT64_STRUCT *structUnitNo, TC_LARGEST_COMPILER_UINT nbrUnits, PCRYPTO_INFO ci) #endif // !TC_WINDOWS_BOOT { int ea = ci->ea; unsigned __int8 *ks = ci->ks; unsigned __int8 *ks2 = ci->ks2; int cipher; switch (ci->mode) { case XTS: for (cipher = EAGetFirstCipher (ea); cipher != 0; cipher = EAGetNextCipher (ea, cipher)) { EncryptBufferXTS (buf, nbrUnits * ENCRYPTION_DATA_UNIT_SIZE, structUnitNo, 0, ks, ks2, cipher); ks += CipherGetKeyScheduleSize (cipher); ks2 += CipherGetKeyScheduleSize (cipher); } break; default: // Unknown/wrong ID TC_THROW_FATAL_EXCEPTION; } } // DecryptBuffer // // buf: data to be decrypted; the start of the buffer is assumed to be aligned with the start of a data unit. // len: number of bytes to decrypt; must be divisible by the block size (for cascaded ciphers, divisible // by the largest block size used within the cascade) void DecryptBuffer (unsigned __int8 *buf, TC_LARGEST_COMPILER_UINT len, PCRYPTO_INFO cryptoInfo) { switch (cryptoInfo->mode) { case XTS: { unsigned __int8 *ks = cryptoInfo->ks + EAGetKeyScheduleSize (cryptoInfo->ea); unsigned __int8 *ks2 = cryptoInfo->ks2 + EAGetKeyScheduleSize (cryptoInfo->ea); UINT64_STRUCT dataUnitNo; int cipher; // When encrypting/decrypting a buffer (typically a volume header) the sequential number // of the first XTS data unit in the buffer is always 0 and the start of the buffer is // always assumed to be aligned with the start of the data unit 0. dataUnitNo.LowPart = 0; dataUnitNo.HighPart = 0; for (cipher = EAGetLastCipher (cryptoInfo->ea); cipher != 0; cipher = EAGetPreviousCipher (cryptoInfo->ea, cipher)) { ks -= CipherGetKeyScheduleSize (cipher); ks2 -= CipherGetKeyScheduleSize (cipher); DecryptBufferXTS (buf, len, &dataUnitNo, 0, ks, ks2, cipher); } } break; default: // Unknown/wrong ID TC_THROW_FATAL_EXCEPTION; } } // buf: data to be decrypted // unitNo: sequential number of the data unit with which the buffer starts // nbrUnits: number of data units in the buffer void DecryptDataUnits (unsigned __int8 *buf, const UINT64_STRUCT *structUnitNo, uint32 nbrUnits, PCRYPTO_INFO ci) #ifndef TC_WINDOWS_BOOT { EncryptionThreadPoolDoWork (DecryptDataUnitsWork, buf, structUnitNo, nbrUnits, ci); } void DecryptDataUnitsCurrentThread (unsigned __int8 *buf, const UINT64_STRUCT *structUnitNo, TC_LARGEST_COMPILER_UINT nbrUnits, PCRYPTO_INFO ci) #endif // !TC_WINDOWS_BOOT { int ea = ci->ea; unsigned __int8 *ks = ci->ks; unsigned __int8 *ks2 = ci->ks2; int cipher; switch (ci->mode) { case XTS: ks += EAGetKeyScheduleSize (ea); ks2 += EAGetKeyScheduleSize (ea); for (cipher = EAGetLastCipher (ea); cipher != 0; cipher = EAGetPreviousCipher (ea, cipher)) { ks -= CipherGetKeyScheduleSize (cipher); ks2 -= CipherGetKeyScheduleSize (cipher); DecryptBufferXTS (buf, nbrUnits * ENCRYPTION_DATA_UNIT_SIZE, structUnitNo, 0, ks, ks2, cipher); } break; default: // Unknown/wrong ID TC_THROW_FATAL_EXCEPTION; } } #else // TC_WINDOWS_BOOT_SINGLE_CIPHER_MODE #if !defined (TC_WINDOWS_BOOT_AES) && !defined (TC_WINDOWS_BOOT_SERPENT) && !defined (TC_WINDOWS_BOOT_TWOFISH) #error No cipher defined #endif void EncipherBlock(int cipher, void *data, void *ks) { #ifdef TC_WINDOWS_BOOT_AES if (IsAesHwCpuSupported()) aes_hw_cpu_encrypt ((byte *) ks, data); else aes_encrypt (data, data, ks); #elif defined (TC_WINDOWS_BOOT_SERPENT) serpent_encrypt (data, data, ks); #elif defined (TC_WINDOWS_BOOT_TWOFISH) twofish_encrypt (ks, data, data); #endif } void DecipherBlock(int cipher, void *data, void *ks) { #ifdef TC_WINDOWS_BOOT_AES if (IsAesHwCpuSupported()) aes_hw_cpu_decrypt ((byte *) ks + sizeof (aes_encrypt_ctx) + 14 * 16, data); else aes_decrypt (data, data, (aes_decrypt_ctx *) ((byte *) ks + sizeof(aes_encrypt_ctx))); #elif defined (TC_WINDOWS_BOOT_SERPENT) serpent_decrypt (data, data, ks); #elif defined (TC_WINDOWS_BOOT_TWOFISH) twofish_decrypt (ks, data, data); #endif } #ifdef TC_WINDOWS_BOOT_AES int EAInit (unsigned char *key, unsigned __int8 *ks) { aes_init(); if (aes_encrypt_key256 (key, (aes_encrypt_ctx *) ks) != EXIT_SUCCESS) return ERR_CIPHER_INIT_FAILURE; if (aes_decrypt_key256 (key, (aes_decrypt_ctx *) (ks + sizeof (aes_encrypt_ctx))) != EXIT_SUCCESS) return ERR_CIPHER_INIT_FAILURE; return ERR_SUCCESS; } #endif void EncryptBuffer (unsigned __int8 *buf, TC_LARGEST_COMPILER_UINT len, PCRYPTO_INFO cryptoInfo) { UINT64_STRUCT dataUnitNo; dataUnitNo.LowPart = 0; dataUnitNo.HighPart = 0; EncryptBufferXTS (buf, len, &dataUnitNo, 0, cryptoInfo->ks, cryptoInfo->ks2, 1); } void EncryptDataUnits (unsigned __int8 *buf, const UINT64_STRUCT *structUnitNo, TC_LARGEST_COMPILER_UINT nbrUnits, PCRYPTO_INFO ci) { EncryptBufferXTS (buf, nbrUnits * ENCRYPTION_DATA_UNIT_SIZE, structUnitNo, 0, ci->ks, ci->ks2, 1); } void DecryptBuffer (unsigned __int8 *buf, TC_LARGEST_COMPILER_UINT len, PCRYPTO_INFO cryptoInfo) { UINT64_STRUCT dataUnitNo; dataUnitNo.LowPart = 0; dataUnitNo.HighPart = 0; DecryptBufferXTS (buf, len, &dataUnitNo, 0, cryptoInfo->ks, cryptoInfo->ks2, 1); } void DecryptDataUnits (unsigned __int8 *buf, const UINT64_STRUCT *structUnitNo, TC_LARGEST_COMPILER_UINT nbrUnits, PCRYPTO_INFO ci) { DecryptBufferXTS (buf, nbrUnits * ENCRYPTION_DATA_UNIT_SIZE, structUnitNo, 0, ci->ks, ci->ks2, 1); } #endif // TC_WINDOWS_BOOT_SINGLE_CIPHER_MODE #if !defined (TC_WINDOWS_BOOT) || defined (TC_WINDOWS_BOOT_AES) static BOOL HwEncryptionDisabled = FALSE; BOOL IsAesHwCpuSupported () { static BOOL state = FALSE; static BOOL stateValid = FALSE; if (!stateValid) { state = is_aes_hw_cpu_supported() ? TRUE : FALSE; stateValid = TRUE; } return state && !HwEncryptionDisabled; } void EnableHwEncryption (BOOL enable) { #if defined (TC_WINDOWS_BOOT) if (enable) aes_hw_cpu_enable_sse(); #endif HwEncryptionDisabled = !enable; } BOOL IsHwEncryptionEnabled () { return !HwEncryptionDisabled; } #endif // !TC_WINDOWS_BOOT href='#n645'>645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456