diff options
Diffstat (limited to 'src/libs/7zip/win/CPP/7zip/Crypto/Rar20Crypto.cpp')
-rw-r--r-- | src/libs/7zip/win/CPP/7zip/Crypto/Rar20Crypto.cpp | 133 |
1 files changed, 0 insertions, 133 deletions
diff --git a/src/libs/7zip/win/CPP/7zip/Crypto/Rar20Crypto.cpp b/src/libs/7zip/win/CPP/7zip/Crypto/Rar20Crypto.cpp deleted file mode 100644 index c2df0e527..000000000 --- a/src/libs/7zip/win/CPP/7zip/Crypto/Rar20Crypto.cpp +++ /dev/null @@ -1,133 +0,0 @@ -// Crypto/Rar20Crypto.cpp - -#include "StdAfx.h" - -#include "../../../C/7zCrc.h" -#include "../../../C/CpuArch.h" -#include "../../../C/RotateDefs.h" - -#include "Rar20Crypto.h" - -namespace NCrypto { -namespace NRar20 { - -static const int kNumRounds = 32; - -static const Byte InitSubstTable[256] = { - 215, 19,149, 35, 73,197,192,205,249, 28, 16,119, 48,221, 2, 42, - 232, 1,177,233, 14, 88,219, 25,223,195,244, 90, 87,239,153,137, - 255,199,147, 70, 92, 66,246, 13,216, 40, 62, 29,217,230, 86, 6, - 71, 24,171,196,101,113,218,123, 93, 91,163,178,202, 67, 44,235, - 107,250, 75,234, 49,167,125,211, 83,114,157,144, 32,193,143, 36, - 158,124,247,187, 89,214,141, 47,121,228, 61,130,213,194,174,251, - 97,110, 54,229,115, 57,152, 94,105,243,212, 55,209,245, 63, 11, - 164,200, 31,156, 81,176,227, 21, 76, 99,139,188,127, 17,248, 51, - 207,120,189,210, 8,226, 41, 72,183,203,135,165,166, 60, 98, 7, - 122, 38,155,170, 69,172,252,238, 39,134, 59,128,236, 27,240, 80, - 131, 3, 85,206,145, 79,154,142,159,220,201,133, 74, 64, 20,129, - 224,185,138,103,173,182, 43, 34,254, 82,198,151,231,180, 58, 10, - 118, 26,102, 12, 50,132, 22,191,136,111,162,179, 45, 4,148,108, - 161, 56, 78,126,242,222, 15,175,146, 23, 33,241,181,190, 77,225, - 0, 46,169,186, 68, 95,237, 65, 53,208,253,168, 9, 18,100, 52, - 116,184,160, 96,109, 37, 30,106,140,104,150, 5,204,117,112, 84 -}; - -void CData::UpdateKeys(const Byte *data) -{ - for (int i = 0; i < 16; i += 4) - for (int j = 0; j < 4; j++) - Keys[j] ^= g_CrcTable[data[i + j]]; -} - -static void Swap(Byte *b1, Byte *b2) -{ - Byte b = *b1; - *b1 = *b2; - *b2 = b; -} - -void CData::SetPassword(const Byte *password, UInt32 passwordLen) -{ - Keys[0] = 0xD3A3B879L; - Keys[1] = 0x3F6D12F7L; - Keys[2] = 0x7515A235L; - Keys[3] = 0xA4E7F123L; - - Byte psw[256]; - memset(psw, 0, sizeof(psw)); - memcpy(psw, password, passwordLen); - memcpy(SubstTable, InitSubstTable, sizeof(SubstTable)); - - for (UInt32 j = 0; j < 256; j++) - for (UInt32 i = 0; i < passwordLen; i += 2) - { - UInt32 n2 = (Byte)g_CrcTable[(psw[i + 1] + j) & 0xFF]; - UInt32 n1 = (Byte)g_CrcTable[(psw[i] - j) & 0xFF]; - for (UInt32 k = 1; (n1 & 0xFF) != n2; n1++, k++) - Swap(&SubstTable[n1 & 0xFF], &SubstTable[(n1 + i + k) & 0xFF]); - } - for (UInt32 i = 0; i < passwordLen; i+= 16) - EncryptBlock(&psw[i]); -} - -void CData::CryptBlock(Byte *buf, bool encrypt) -{ - Byte inBuf[16]; - UInt32 A, B, C, D, T, TA, TB; - - A = GetUi32(buf + 0) ^ Keys[0]; - B = GetUi32(buf + 4) ^ Keys[1]; - C = GetUi32(buf + 8) ^ Keys[2]; - D = GetUi32(buf + 12) ^ Keys[3]; - - if (!encrypt) - memcpy(inBuf, buf, sizeof(inBuf)); - - for (int i = 0; i < kNumRounds; i++) - { - UInt32 key = Keys[(encrypt ? i : (kNumRounds - 1 - i)) & 3]; - T = ((C + rotlFixed(D, 11)) ^ key); - TA = A ^ SubstLong(T); - T = ((D ^ rotlFixed(C, 17)) + key); - TB = B ^ SubstLong(T); - A = C; - B = D; - C = TA; - D = TB; - } - - SetUi32(buf + 0, C ^ Keys[0]); - SetUi32(buf + 4, D ^ Keys[1]); - SetUi32(buf + 8, A ^ Keys[2]); - SetUi32(buf + 12, B ^ Keys[3]); - - UpdateKeys(encrypt ? buf : inBuf); -} - -STDMETHODIMP CDecoder::CryptoSetPassword(const Byte *data, UInt32 size) -{ - _cipher.SetPassword(data, size); - return S_OK; -} - -STDMETHODIMP CDecoder::Init() -{ - return S_OK; -} - -static const UInt32 kBlockSize = 16; - -STDMETHODIMP_(UInt32) CDecoder::Filter(Byte *data, UInt32 size) -{ - if (size == 0) - return 0; - if (size < kBlockSize) - return kBlockSize; - UInt32 i; - size -= kBlockSize; - for (i = 0; i <= size; i += kBlockSize) - _cipher.DecryptBlock(data + i); - return i; -} - -}} |