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Diffstat (limited to 'Common/Crypto.c')
| -rw-r--r-- | Common/Crypto.c | 1871 |
1 files changed, 1871 insertions, 0 deletions
diff --git a/Common/Crypto.c b/Common/Crypto.c new file mode 100644 index 0000000..a3d3cca --- /dev/null +++ b/Common/Crypto.c @@ -0,0 +1,1871 @@ +/* + 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 <string.h> +#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 }, +#ifndef TC_WINDOWS_BOOT + { BLOWFISH, "Blowfish", 8, 56, sizeof (BF_KEY) }, // Deprecated/legacy + { CAST, "CAST5", 8, 16, sizeof (CAST_KEY) }, // Deprecated/legacy + { TRIPLEDES,"Triple DES", 8, 8*3, sizeof (TDES_KEY) }, // Deprecated/legacy +#endif + { 0, 0, 0, 0, 0 } +}; + + +// Encryption algorithm configuration +// The following modes have been deprecated (legacy): LRW, CBC, INNER_CBC, OUTER_CBC +static EncryptionAlgorithm EncryptionAlgorithms[] = +{ + // Cipher(s) Modes FormatEnabled + +#ifndef TC_WINDOWS_BOOT + + { { 0, 0 }, { 0, 0, 0, 0 }, 0 }, // Must be all-zero + { { AES, 0 }, { XTS, LRW, CBC, 0 }, 1 }, + { { SERPENT, 0 }, { XTS, LRW, CBC, 0 }, 1 }, + { { TWOFISH, 0 }, { XTS, LRW, CBC, 0 }, 1 }, + { { TWOFISH, AES, 0 }, { XTS, LRW, OUTER_CBC, 0 }, 1 }, + { { SERPENT, TWOFISH, AES, 0 }, { XTS, LRW, OUTER_CBC, 0 }, 1 }, + { { AES, SERPENT, 0 }, { XTS, LRW, OUTER_CBC, 0 }, 1 }, + { { AES, TWOFISH, SERPENT, 0 }, { XTS, LRW, OUTER_CBC, 0 }, 1 }, + { { SERPENT, TWOFISH, 0 }, { XTS, LRW, OUTER_CBC, 0 }, 1 }, + { { BLOWFISH, 0 }, { LRW, CBC, 0, 0 }, 0 }, // Deprecated/legacy + { { CAST, 0 }, { LRW, CBC, 0, 0 }, 0 }, // Deprecated/legacy + { { TRIPLEDES, 0 }, { LRW, CBC, 0, 0 }, 0 }, // Deprecated/legacy + { { BLOWFISH, AES, 0 }, { INNER_CBC, 0, 0, 0 }, 0 }, // Deprecated/legacy + { { SERPENT, BLOWFISH, AES, 0 }, { INNER_CBC, 0, 0, 0 }, 0 }, // Deprecated/legacy + { { 0, 0 }, { 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 + { RIPEMD160, "RIPEMD-160", FALSE, TRUE }, +#ifndef TC_WINDOWS_BOOT + { SHA512, "SHA-512", FALSE, FALSE }, + { WHIRLPOOL, "Whirlpool", FALSE, FALSE }, + { SHA1, "SHA-1", TRUE, FALSE }, // Deprecated/legacy +#endif + { 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, CipherGetKeySize(SERPENT) * 8, ks); + break; + + case TWOFISH: + twofish_set_key ((TwofishInstance *)ks, (const u4byte *)key, CipherGetKeySize(TWOFISH) * 8); + break; + +#ifndef TC_WINDOWS_BOOT + + case BLOWFISH: + /* Deprecated/legacy */ + BlowfishSetKey ((BF_KEY *)ks, CipherGetKeySize(BLOWFISH), key); + break; + + case CAST: + /* Deprecated/legacy */ + Cast5SetKey ((CAST_KEY *) ks, CipherGetKeySize(CAST), key); + break; + + case TRIPLEDES: + /* Deprecated/legacy */ + TripleDesSetKey (key, CipherGetKeySize (TRIPLEDES), (TDES_KEY *) ks); + + // Verify whether all three DES keys are mutually different + if (((*((__int64 *) key) ^ *((__int64 *) key+1)) & 0xFEFEFEFEFEFEFEFEULL) == 0 + || ((*((__int64 *) key+1) ^ *((__int64 *) key+2)) & 0xFEFEFEFEFEFEFEFEULL) == 0 + || ((*((__int64 *) key) ^ *((__int64 *) key+2)) & 0xFEFEFEFEFEFEFEFEULL) == 0) + retVal = ERR_CIPHER_INIT_WEAK_KEY; // Non-fatal error + + break; + +#endif // TC_WINDOWS_BOOT + + 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; +#ifndef TC_WINDOWS_BOOT + case BLOWFISH: BlowfishEncryptLE (data, data, ks, 1); break; // Deprecated/legacy + case CAST: Cast5Encrypt (data, data, ks); break; // Deprecated/legacy + case TRIPLEDES: TripleDesEncrypt (data, data, ks, 1); break; // Deprecated/legacy +#endif + 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; + + case BLOWFISH: BlowfishEncryptLE (data, data, ks, 0); break; // Deprecated/legacy + case CAST: Cast5Decrypt (data, data, ks); break; // Deprecated/legacy + case TRIPLEDES: TripleDesEncrypt (data, data, ks, 0); break; // Deprecated/legacy +#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; +} + +char *CipherGetName (int cipherId) +{ + return CipherGet (cipherId) -> Name; +} + +int CipherGetBlockSize (int cipherId) +{ + return CipherGet (cipherId) -> BlockSize; +} + +int CipherGetKeySize (int cipherId) +{ + return CipherGet (cipherId) -> KeySize; +} + +int CipherGetKeyScheduleSize (int cipherId) +{ + return CipherGet (cipherId) -> KeyScheduleSize; +} + +#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; + + case LRW: + switch (CipherGetBlockSize (EAGetFirstCipher (ci->ea))) + { + case 8: + /* Deprecated/legacy */ + return Gf64TabInit (ci->k2, &ci->gf_ctx); + + case 16: + return Gf128Tab64Init (ci->k2, &ci->gf_ctx); + + default: + TC_THROW_FATAL_EXCEPTION; + } + + break; + + case CBC: + case INNER_CBC: + case OUTER_CBC: + // The mode does not need to be initialized or is initialized elsewhere + return TRUE; + + default: + // Unknown/wrong ID + TC_THROW_FATAL_EXCEPTION; + } + return TRUE; +} + + +// Returns name of EA, cascaded cipher names are separated by hyphens +char *EAGetName (char *buf, int ea) +{ + 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); + 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"; + + case LRW: + + /* Deprecated/legacy */ + + return "LRW"; + + case CBC: + { + /* Deprecated/legacy */ + + char eaName[100]; + EAGetName (eaName, ea); + + if (strcmp (eaName, "Triple DES") == 0) + return capitalLetters ? "Outer-CBC" : "outer-CBC"; + + return "CBC"; + } + + case OUTER_CBC: + + /* Deprecated/legacy */ + + return capitalLetters ? "Outer-CBC" : "outer-CBC"; + + case INNER_CBC: + + /* Deprecated/legacy */ + + return capitalLetters ? "Inner-CBC" : "inner-CBC"; + + } + 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; +} + + +char *HashGetName (int hashId) +{ + return HashGet (hashId) -> Name; +} + + +BOOL HashIsDeprecated (int hashId) +{ + return HashGet (hashId) -> Deprecated; +} + + +#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 + + +#ifndef TC_NO_COMPILER_INT64 +void Xor128 (unsigned __int64 *a, unsigned __int64 *b) +{ + *a++ ^= *b++; + *a ^= *b; +} + + +void Xor64 (unsigned __int64 *a, unsigned __int64 *b) +{ + *a ^= *b; +} + + +void EncryptBufferLRW128 (byte *buffer, uint64 length, uint64 blockIndex, PCRYPTO_INFO cryptoInfo) +{ + /* Deprecated/legacy */ + + int cipher = EAGetFirstCipher (cryptoInfo->ea); + int cipherCount = EAGetCipherCount (cryptoInfo->ea); + unsigned __int8 *p = buffer; + unsigned __int8 *ks = cryptoInfo->ks; + unsigned __int8 i[8]; + unsigned __int8 t[16]; + unsigned __int64 b; + + *(unsigned __int64 *)i = BE64(blockIndex); + + if (length % 16) + TC_THROW_FATAL_EXCEPTION; + + // Note that the maximum supported volume size is 8589934592 GB (i.e., 2^63 bytes). + + for (b = 0; b < length >> 4; b++) + { + Gf128MulBy64Tab (i, t, &cryptoInfo->gf_ctx); + Xor128 ((unsigned __int64 *)p, (unsigned __int64 *)t); + + if (cipherCount > 1) + { + // Cipher cascade + for (cipher = EAGetFirstCipher (cryptoInfo->ea); + cipher != 0; + cipher = EAGetNextCipher (cryptoInfo->ea, cipher)) + { + EncipherBlock (cipher, p, ks); + ks += CipherGetKeyScheduleSize (cipher); + } + ks = cryptoInfo->ks; + } + else + { + EncipherBlock (cipher, p, ks); + } + + Xor128 ((unsigned __int64 *)p, (unsigned __int64 *)t); + + p += 16; + + if (i[7] != 0xff) + i[7]++; + else + *(unsigned __int64 *)i = BE64 ( BE64(*(unsigned __int64 *)i) + 1 ); + } + + FAST_ERASE64 (t, sizeof(t)); +} + + +void EncryptBufferLRW64 (byte *buffer, uint64 length, uint64 blockIndex, PCRYPTO_INFO cryptoInfo) +{ + /* Deprecated/legacy */ + + int cipher = EAGetFirstCipher (cryptoInfo->ea); + unsigned __int8 *p = buffer; + unsigned __int8 *ks = cryptoInfo->ks; + unsigned __int8 i[8]; + unsigned __int8 t[8]; + unsigned __int64 b; + + *(unsigned __int64 *)i = BE64(blockIndex); + + if (length % 8) + TC_THROW_FATAL_EXCEPTION; + + for (b = 0; b < length >> 3; b++) + { + Gf64MulTab (i, t, &cryptoInfo->gf_ctx); + Xor64 ((unsigned __int64 *)p, (unsigned __int64 *)t); + + EncipherBlock (cipher, p, ks); + + Xor64 ((unsigned __int64 *)p, (unsigned __int64 *)t); + + p += 8; + + if (i[7] != 0xff) + i[7]++; + else + *(unsigned __int64 *)i = BE64 ( BE64(*(unsigned __int64 *)i) + 1 ); + } + + FAST_ERASE64 (t, sizeof(t)); +} + + +void DecryptBufferLRW128 (byte *buffer, uint64 length, uint64 blockIndex, PCRYPTO_INFO cryptoInfo) +{ + /* Deprecated/legacy */ + + int cipher = EAGetFirstCipher (cryptoInfo->ea); + int cipherCount = EAGetCipherCount (cryptoInfo->ea); + unsigned __int8 *p = buffer; + unsigned __int8 *ks = cryptoInfo->ks; + unsigned __int8 i[8]; + unsigned __int8 t[16]; + unsigned __int64 b; + + *(unsigned __int64 *)i = BE64(blockIndex); + + if (length % 16) + TC_THROW_FATAL_EXCEPTION; + + // Note that the maximum supported volume size is 8589934592 GB (i.e., 2^63 bytes). + + for (b = 0; b < length >> 4; b++) + { + Gf128MulBy64Tab (i, t, &cryptoInfo->gf_ctx); + Xor128 ((unsigned __int64 *)p, (unsigned __int64 *)t); + + if (cipherCount > 1) + { + // Cipher cascade + ks = cryptoInfo->ks + EAGetKeyScheduleSize (cryptoInfo->ea); + + for (cipher = EAGetLastCipher (cryptoInfo->ea); + cipher != 0; + cipher = EAGetPreviousCipher (cryptoInfo->ea, cipher)) + { + ks -= CipherGetKeyScheduleSize (cipher); + DecipherBlock (cipher, p, ks); + } + } + else + { + DecipherBlock (cipher, p, ks); + } + + Xor128 ((unsigned __int64 *)p, (unsigned __int64 *)t); + + p += 16; + + if (i[7] != 0xff) + i[7]++; + else + *(unsigned __int64 *)i = BE64 ( BE64(*(unsigned __int64 *)i) + 1 ); + } + + FAST_ERASE64 (t, sizeof(t)); +} + + + +void DecryptBufferLRW64 (byte *buffer, uint64 length, uint64 blockIndex, PCRYPTO_INFO cryptoInfo) +{ + /* Deprecated/legacy */ + + int cipher = EAGetFirstCipher (cryptoInfo->ea); + unsigned __int8 *p = buffer; + unsigned __int8 *ks = cryptoInfo->ks; + unsigned __int8 i[8]; + unsigned __int8 t[8]; + unsigned __int64 b; + + *(unsigned __int64 *)i = BE64(blockIndex); + + if (length % 8) + TC_THROW_FATAL_EXCEPTION; + + for (b = 0; b < length >> 3; b++) + { + Gf64MulTab (i, t, &cryptoInfo->gf_ctx); + Xor64 ((unsigned __int64 *)p, (unsigned __int64 *)t); + + DecipherBlock (cipher, p, ks); + + Xor64 ((unsigned __int64 *)p, (unsigned __int64 *)t); + + p += 8; + + if (i[7] != 0xff) + i[7]++; + else + *(unsigned __int64 *)i = BE64 ( BE64(*(unsigned __int64 *)i) + 1 ); + } + + FAST_ERASE64 (t, sizeof(t)); +} + + +// Initializes IV and whitening values for sector encryption/decryption in CBC mode. +// IMPORTANT: This function has been deprecated (legacy). +static void +InitSectorIVAndWhitening (unsigned __int64 unitNo, + int blockSize, + unsigned __int32 *iv, + unsigned __int64 *ivSeed, + unsigned __int32 *whitening) +{ + + /* IMPORTANT: This function has been deprecated (legacy) */ + + unsigned __int64 iv64[4]; + unsigned __int32 *iv32 = (unsigned __int32 *) iv64; + + iv64[0] = ivSeed[0] ^ LE64(unitNo); + iv64[1] = ivSeed[1] ^ LE64(unitNo); + iv64[2] = ivSeed[2] ^ LE64(unitNo); + if (blockSize == 16) + { + iv64[3] = ivSeed[3] ^ LE64(unitNo); + } + + iv[0] = iv32[0]; + iv[1] = iv32[1]; + + switch (blockSize) + { + case 16: + + // 128-bit block + + iv[2] = iv32[2]; + iv[3] = iv32[3]; + + whitening[0] = LE32( crc32int ( &iv32[4] ) ^ crc32int ( &iv32[7] ) ); + whitening[1] = LE32( crc32int ( &iv32[5] ) ^ crc32int ( &iv32[6] ) ); + break; + + case 8: + + // 64-bit block + + whitening[0] = LE32( crc32int ( &iv32[2] ) ^ crc32int ( &iv32[5] ) ); + whitening[1] = LE32( crc32int ( &iv32[3] ) ^ crc32int ( &iv32[4] ) ); + break; + + default: + TC_THROW_FATAL_EXCEPTION; + } +} + + +// EncryptBufferCBC (deprecated/legacy) +// +// data: data to be encrypted +// len: number of bytes to encrypt (must be divisible by the largest cipher block size) +// ks: scheduled key +// iv: IV +// whitening: whitening constants +// ea: outer-CBC cascade ID (0 = CBC/inner-CBC) +// cipher: CBC/inner-CBC cipher ID (0 = outer-CBC) + +static void +EncryptBufferCBC (unsigned __int32 *data, + unsigned int len, + unsigned __int8 *ks, + unsigned __int32 *iv, + unsigned __int32 *whitening, + int ea, + int cipher) +{ + /* IMPORTANT: This function has been deprecated (legacy) */ + + unsigned __int32 bufIV[4]; + unsigned __int64 i; + int blockSize = CipherGetBlockSize (ea != 0 ? EAGetFirstCipher (ea) : cipher); + + if (len % blockSize) + TC_THROW_FATAL_EXCEPTION; + + // IV + bufIV[0] = iv[0]; + bufIV[1] = iv[1]; + if (blockSize == 16) + { + bufIV[2] = iv[2]; + bufIV[3] = iv[3]; + } + + // Encrypt each block + for (i = 0; i < len/blockSize; i++) + { + // CBC + data[0] ^= bufIV[0]; + data[1] ^= bufIV[1]; + if (blockSize == 16) + { + data[2] ^= bufIV[2]; + data[3] ^= bufIV[3]; + } + + if (ea != 0) + { + // Outer-CBC + for (cipher = EAGetFirstCipher (ea); cipher != 0; cipher = EAGetNextCipher (ea, cipher)) + { + EncipherBlock (cipher, data, ks); + ks += CipherGetKeyScheduleSize (cipher); + } + ks -= EAGetKeyScheduleSize (ea); + } + else + { + // CBC/inner-CBC + EncipherBlock (cipher, data, ks); + } + + // CBC + bufIV[0] = data[0]; + bufIV[1] = data[1]; + if (blockSize == 16) + { + bufIV[2] = data[2]; + bufIV[3] = data[3]; + } + + // Whitening + data[0] ^= whitening[0]; + data[1] ^= whitening[1]; + if (blockSize == 16) + { + data[2] ^= whitening[0]; + data[3] ^= whitening[1]; + } + + data += blockSize / sizeof(*data); + } +} + + +// DecryptBufferCBC (deprecated/legacy) +// +// data: data to be decrypted +// len: number of bytes to decrypt (must be divisible by the largest cipher block size) +// ks: scheduled key +// iv: IV +// whitening: whitening constants +// ea: outer-CBC cascade ID (0 = CBC/inner-CBC) +// cipher: CBC/inner-CBC cipher ID (0 = outer-CBC) + +static void +DecryptBufferCBC (unsigned __int32 *data, + unsigned int len, + unsigned __int8 *ks, + unsigned __int32 *iv, + unsigned __int32 *whitening, + int ea, + int cipher) +{ + + /* IMPORTANT: This function has been deprecated (legacy) */ + + unsigned __int32 bufIV[4]; + unsigned __int64 i; + unsigned __int32 ct[4]; + int blockSize = CipherGetBlockSize (ea != 0 ? EAGetFirstCipher (ea) : cipher); + + if (len % blockSize) + TC_THROW_FATAL_EXCEPTION; + + // IV + bufIV[0] = iv[0]; + bufIV[1] = iv[1]; + if (blockSize == 16) + { + bufIV[2] = iv[2]; + bufIV[3] = iv[3]; + } + + // Decrypt each block + for (i = 0; i < len/blockSize; i++) + { + // Dewhitening + data[0] ^= whitening[0]; + data[1] ^= whitening[1]; + if (blockSize == 16) + { + data[2] ^= whitening[0]; + data[3] ^= whitening[1]; + } + + // CBC + ct[0] = data[0]; + ct[1] = data[1]; + if (blockSize == 16) + { + ct[2] = data[2]; + ct[3] = data[3]; + } + + if (ea != 0) + { + // Outer-CBC + ks += EAGetKeyScheduleSize (ea); + for (cipher = EAGetLastCipher (ea); cipher != 0; cipher = EAGetPreviousCipher (ea, cipher)) + { + ks -= CipherGetKeyScheduleSize (cipher); + DecipherBlock (cipher, data, ks); + } + } + else + { + // CBC/inner-CBC + DecipherBlock (cipher, data, ks); + } + + // CBC + data[0] ^= bufIV[0]; + data[1] ^= bufIV[1]; + bufIV[0] = ct[0]; + bufIV[1] = ct[1]; + if (blockSize == 16) + { + data[2] ^= bufIV[2]; + data[3] ^= bufIV[3]; + bufIV[2] = ct[2]; + bufIV[3] = ct[3]; + } + + data += blockSize / sizeof(*data); + } +} +#endif // #ifndef TC_NO_COMPILER_INT64 + + +// 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; + +#ifndef TC_NO_COMPILER_INT64 + case LRW: + + /* Deprecated/legacy */ + + switch (CipherGetBlockSize (EAGetFirstCipher (cryptoInfo->ea))) + { + case 8: + EncryptBufferLRW64 ((unsigned __int8 *)buf, (unsigned __int64) len, 1, cryptoInfo); + break; + + case 16: + EncryptBufferLRW128 ((unsigned __int8 *)buf, (unsigned __int64) len, 1, cryptoInfo); + break; + + default: + TC_THROW_FATAL_EXCEPTION; + } + break; + + case CBC: + case INNER_CBC: + { + /* Deprecated/legacy */ + + unsigned __int8 *ks = cryptoInfo->ks; + int cipher; + + for (cipher = EAGetFirstCipher (cryptoInfo->ea); + cipher != 0; + cipher = EAGetNextCipher (cryptoInfo->ea, cipher)) + { + EncryptBufferCBC ((unsigned __int32 *) buf, + (unsigned int) len, + ks, + (unsigned __int32 *) cryptoInfo->k2, + (unsigned __int32 *) &cryptoInfo->k2[8], + 0, + cipher); + + ks += CipherGetKeyScheduleSize (cipher); + } + } + break; + + case OUTER_CBC: + + /* Deprecated/legacy */ + + EncryptBufferCBC ((unsigned __int32 *) buf, + (unsigned int) len, + cryptoInfo->ks, + (unsigned __int32 *) cryptoInfo->k2, + (unsigned __int32 *) &cryptoInfo->k2[8], + cryptoInfo->ea, + 0); + + break; +#endif // #ifndef TC_NO_COMPILER_INT64 + + default: + // Unknown/wrong ID + TC_THROW_FATAL_EXCEPTION; + } +} + +#ifndef TC_NO_COMPILER_INT64 +// Converts a data unit number to the index of the first LRW block in the data unit. +// Note that the maximum supported volume size is 8589934592 GB (i.e., 2^63 bytes). +uint64 DataUnit2LRWIndex (uint64 dataUnit, int blockSize, PCRYPTO_INFO ci) +{ + /* Deprecated/legacy */ + + if (ci->hiddenVolume) + dataUnit -= ci->hiddenVolumeOffset / ENCRYPTION_DATA_UNIT_SIZE; + else + dataUnit -= TC_VOLUME_HEADER_SIZE_LEGACY / ENCRYPTION_DATA_UNIT_SIZE; // Compensate for the volume header size + + switch (blockSize) + { + case 8: + return (dataUnit << 6) | 1; + + case 16: + return (dataUnit << 5) | 1; + + default: + TC_THROW_FATAL_EXCEPTION; + } + + return 0; +} +#endif // #ifndef TC_NO_COMPILER_INT64 + + +// 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; + +#ifndef TC_NO_COMPILER_INT64 + void *iv = ci->k2; // Deprecated/legacy + unsigned __int64 unitNo = structUnitNo->Value; + unsigned __int64 *iv64 = (unsigned __int64 *) iv; // Deprecated/legacy + unsigned __int32 sectorIV[4]; // Deprecated/legacy + unsigned __int32 secWhitening[2]; // Deprecated/legacy +#endif + + 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; + +#ifndef TC_NO_COMPILER_INT64 + case LRW: + + /* Deprecated/legacy */ + + switch (CipherGetBlockSize (EAGetFirstCipher (ea))) + { + case 8: + EncryptBufferLRW64 (buf, + (unsigned __int64) nbrUnits * ENCRYPTION_DATA_UNIT_SIZE, + DataUnit2LRWIndex (unitNo, 8, ci), + ci); + break; + + case 16: + EncryptBufferLRW128 (buf, + (unsigned __int64) nbrUnits * ENCRYPTION_DATA_UNIT_SIZE, + DataUnit2LRWIndex (unitNo, 16, ci), + ci); + break; + + default: + TC_THROW_FATAL_EXCEPTION; + } + break; + + case CBC: + case INNER_CBC: + + /* Deprecated/legacy */ + + while (nbrUnits--) + { + for (cipher = EAGetFirstCipher (ea); cipher != 0; cipher = EAGetNextCipher (ea, cipher)) + { + InitSectorIVAndWhitening (unitNo, CipherGetBlockSize (cipher), sectorIV, iv64, secWhitening); + + EncryptBufferCBC ((unsigned __int32 *) buf, + ENCRYPTION_DATA_UNIT_SIZE, + ks, + sectorIV, + secWhitening, + 0, + cipher); + + ks += CipherGetKeyScheduleSize (cipher); + } + ks -= EAGetKeyScheduleSize (ea); + buf += ENCRYPTION_DATA_UNIT_SIZE; + unitNo++; + } + break; + + case OUTER_CBC: + + /* Deprecated/legacy */ + + while (nbrUnits--) + { + InitSectorIVAndWhitening (unitNo, CipherGetBlockSize (EAGetFirstCipher (ea)), sectorIV, iv64, secWhitening); + + EncryptBufferCBC ((unsigned __int32 *) buf, + ENCRYPTION_DATA_UNIT_SIZE, + ks, + sectorIV, + secWhitening, + ea, + 0); + + buf += ENCRYPTION_DATA_UNIT_SIZE; + unitNo++; + } + break; +#endif // #ifndef TC_NO_COMPILER_INT64 + + 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; + +#ifndef TC_NO_COMPILER_INT64 + case LRW: + + /* Deprecated/legacy */ + + switch (CipherGetBlockSize (EAGetFirstCipher (cryptoInfo->ea))) + { + case 8: + DecryptBufferLRW64 (buf, (unsigned __int64) len, 1, cryptoInfo); + break; + + case 16: + DecryptBufferLRW128 (buf, (unsigned __int64) len, 1, cryptoInfo); + break; + + default: + TC_THROW_FATAL_EXCEPTION; + } + break; + + case CBC: + case INNER_CBC: + { + /* Deprecated/legacy */ + + unsigned __int8 *ks = cryptoInfo->ks + EAGetKeyScheduleSize (cryptoInfo->ea); + int cipher; + for (cipher = EAGetLastCipher (cryptoInfo->ea); + cipher != 0; + cipher = EAGetPreviousCipher (cryptoInfo->ea, cipher)) + { + ks -= CipherGetKeyScheduleSize (cipher); + + DecryptBufferCBC ((unsigned __int32 *) buf, + (unsigned int) len, + ks, + (unsigned __int32 *) cryptoInfo->k2, + (unsigned __int32 *) &cryptoInfo->k2[8], + 0, + cipher); + } + } + break; + + case OUTER_CBC: + + /* Deprecated/legacy */ + + DecryptBufferCBC ((unsigned __int32 *) buf, + (unsigned int) len, + cryptoInfo->ks, + (unsigned __int32 *) cryptoInfo->k2, + (unsigned __int32 *) &cryptoInfo->k2[8], + cryptoInfo->ea, + 0); + + break; +#endif // #ifndef TC_NO_COMPILER_INT64 + + 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; + +#ifndef TC_NO_COMPILER_INT64 + void *iv = ci->k2; // Deprecated/legacy + unsigned __int64 unitNo = structUnitNo->Value; + unsigned __int64 *iv64 = (unsigned __int64 *) iv; // Deprecated/legacy + unsigned __int32 sectorIV[4]; // Deprecated/legacy + unsigned __int32 secWhitening[2]; // Deprecated/legacy +#endif // #ifndef TC_NO_COMPILER_INT64 + + + 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; + +#ifndef TC_NO_COMPILER_INT64 + case LRW: + + /* Deprecated/legacy */ + + switch (CipherGetBlockSize (EAGetFirstCipher (ea))) + { + case 8: + DecryptBufferLRW64 (buf, + (unsigned __int64) nbrUnits * ENCRYPTION_DATA_UNIT_SIZE, + DataUnit2LRWIndex (unitNo, 8, ci), + ci); + break; + + case 16: + DecryptBufferLRW128 (buf, + (unsigned __int64) nbrUnits * ENCRYPTION_DATA_UNIT_SIZE, + DataUnit2LRWIndex (unitNo, 16, ci), + ci); + break; + + default: + TC_THROW_FATAL_EXCEPTION; + } + break; + + case CBC: + case INNER_CBC: + + /* Deprecated/legacy */ + + while (nbrUnits--) + { + ks += EAGetKeyScheduleSize (ea); + for (cipher = EAGetLastCipher (ea); cipher != 0; cipher = EAGetPreviousCipher (ea, cipher)) + { + InitSectorIVAndWhitening (unitNo, CipherGetBlockSize (cipher), sectorIV, iv64, secWhitening); + + ks -= CipherGetKeyScheduleSize (cipher); + + DecryptBufferCBC ((unsigned __int32 *) buf, + ENCRYPTION_DATA_UNIT_SIZE, + ks, + sectorIV, + secWhitening, + 0, + cipher); + } + buf += ENCRYPTION_DATA_UNIT_SIZE; + unitNo++; + } + break; + + case OUTER_CBC: + + /* Deprecated/legacy */ + + while (nbrUnits--) + { + InitSectorIVAndWhitening (unitNo, CipherGetBlockSize (EAGetFirstCipher (ea)), sectorIV, iv64, secWhitening); + + DecryptBufferCBC ((unsigned __int32 *) buf, + ENCRYPTION_DATA_UNIT_SIZE, + ks, + sectorIV, + secWhitening, + ea, + 0); + + buf += ENCRYPTION_DATA_UNIT_SIZE; + unitNo++; + } + break; +#endif // #ifndef TC_NO_COMPILER_INT64 + + default: + // Unknown/wrong ID + TC_THROW_FATAL_EXCEPTION; + } +} + + +// 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 + +#ifndef TC_WINDOWS_BOOT + size = max (size, LEGACY_VOL_IV_SIZE + EAGetLargestKeyForMode (LRW)); // Deprecated/legacy + size = max (size, LEGACY_VOL_IV_SIZE + EAGetLargestKeyForMode (CBC)); // Deprecated/legacy + size = max (size, LEGACY_VOL_IV_SIZE + EAGetLargestKeyForMode (OUTER_CBC)); // Deprecated/legacy + size = max (size, LEGACY_VOL_IV_SIZE + EAGetLargestKeyForMode (INNER_CBC)); // Deprecated/legacy +#endif + + return size; +} + + +#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 +} + +int EAGetFirst () +{ + return 1; +} + +int EAGetNext (int previousEA) +{ + return 0; +} + +int EAInit (int ea, unsigned char *key, unsigned __int8 *ks) +{ +#ifdef TC_WINDOWS_BOOT_AES + + 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; + +#elif defined (TC_WINDOWS_BOOT_SERPENT) + serpent_set_key (key, 32 * 8, ks); +#elif defined (TC_WINDOWS_BOOT_TWOFISH) + twofish_set_key ((TwofishInstance *)ks, (const u4byte *)key, 32 * 8); +#endif + return ERR_SUCCESS; +} + +int EAGetKeySize (int ea) +{ + return 32; +} + +int EAGetFirstCipher (int ea) +{ + return 1; +} + +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 |