diff options
Diffstat (limited to 'src/libs/7zip/unix/CPP/7zip/Crypto/Sha1.cpp')
| -rw-r--r-- | src/libs/7zip/unix/CPP/7zip/Crypto/Sha1.cpp | 229 |
1 files changed, 229 insertions, 0 deletions
diff --git a/src/libs/7zip/unix/CPP/7zip/Crypto/Sha1.cpp b/src/libs/7zip/unix/CPP/7zip/Crypto/Sha1.cpp new file mode 100644 index 000000000..82ca986c7 --- /dev/null +++ b/src/libs/7zip/unix/CPP/7zip/Crypto/Sha1.cpp @@ -0,0 +1,229 @@ +// Crypto/Sha1.cpp +// This file is based on public domain +// Steve Reid and Wei Dai's code from Crypto++ + +#include "StdAfx.h" + +#include "../../../C/RotateDefs.h" + +#include "Sha1.h" + +namespace NCrypto { +namespace NSha1 { + +// define it for speed optimization +// #define _SHA1_UNROLL + +static const unsigned kNumW = + #ifdef _SHA1_UNROLL + 16; + #else + 80; + #endif + + +#define w0(i) (W[(i)] = data[(i)]) + +#ifdef _SHA1_UNROLL +#define w1(i) (W[(i)&15] = rotlFixed(W[((i)-3)&15] ^ W[((i)-8)&15] ^ W[((i)-14)&15] ^ W[((i)-16)&15], 1)) +#else +#define w1(i) (W[(i)] = rotlFixed(W[(i)-3] ^ W[(i)-8] ^ W[(i)-14] ^ W[(i)-16], 1)) +#endif + +#define f1(x,y,z) (z^(x&(y^z))) +#define f2(x,y,z) (x^y^z) +#define f3(x,y,z) ((x&y)|(z&(x|y))) +#define f4(x,y,z) (x^y^z) + +#define RK1(a,b,c,d,e,i, f, w, k) e += f(b,c,d) + w(i) + k + rotlFixed(a,5); b = rotlFixed(b,30); + +#define R0(a,b,c,d,e,i) RK1(a,b,c,d,e,i, f1, w0, 0x5A827999) +#define R1(a,b,c,d,e,i) RK1(a,b,c,d,e,i, f1, w1, 0x5A827999) +#define R2(a,b,c,d,e,i) RK1(a,b,c,d,e,i, f2, w1, 0x6ED9EBA1) +#define R3(a,b,c,d,e,i) RK1(a,b,c,d,e,i, f3, w1, 0x8F1BBCDC) +#define R4(a,b,c,d,e,i) RK1(a,b,c,d,e,i, f4, w1, 0xCA62C1D6) + +#define RX_1_4(rx1, rx4, i) rx1(a,b,c,d,e,i); rx4(e,a,b,c,d,i+1); rx4(d,e,a,b,c,i+2); rx4(c,d,e,a,b,i+3); rx4(b,c,d,e,a,i+4); +#define RX_5(rx, i) RX_1_4(rx, rx, i); + +void CContextBase::Init() +{ + _state[0] = 0x67452301; + _state[1] = 0xEFCDAB89; + _state[2] = 0x98BADCFE; + _state[3] = 0x10325476; + _state[4] = 0xC3D2E1F0; + _count = 0; +} + +void CContextBase::GetBlockDigest(UInt32 *data, UInt32 *destDigest, bool returnRes) +{ + UInt32 a, b, c, d, e; + UInt32 W[kNumW]; + + a = _state[0]; + b = _state[1]; + c = _state[2]; + d = _state[3]; + e = _state[4]; + #ifdef _SHA1_UNROLL + RX_5(R0, 0); RX_5(R0, 5); RX_5(R0, 10); + #else + int i; + for (i = 0; i < 15; i += 5) { RX_5(R0, i); } + #endif + + RX_1_4(R0, R1, 15); + + + #ifdef _SHA1_UNROLL + RX_5(R2, 20); RX_5(R2, 25); RX_5(R2, 30); RX_5(R2, 35); + RX_5(R3, 40); RX_5(R3, 45); RX_5(R3, 50); RX_5(R3, 55); + RX_5(R4, 60); RX_5(R4, 65); RX_5(R4, 70); RX_5(R4, 75); + #else + i = 20; + for (; i < 40; i += 5) { RX_5(R2, i); } + for (; i < 60; i += 5) { RX_5(R3, i); } + for (; i < 80; i += 5) { RX_5(R4, i); } + #endif + + destDigest[0] = _state[0] + a; + destDigest[1] = _state[1] + b; + destDigest[2] = _state[2] + c; + destDigest[3] = _state[3] + d; + destDigest[4] = _state[4] + e; + + if (returnRes) + for (int i = 0 ; i < 16; i++) + data[i] = W[kNumW - 16 + i]; + + // Wipe variables + // a = b = c = d = e = 0; +} + +void CContextBase::PrepareBlock(UInt32 *block, unsigned size) const +{ + unsigned curBufferPos = size & 0xF; + block[curBufferPos++] = 0x80000000; + while (curBufferPos != (16 - 2)) + block[curBufferPos++] = 0; + const UInt64 lenInBits = (_count << 9) + ((UInt64)size << 5); + block[curBufferPos++] = (UInt32)(lenInBits >> 32); + block[curBufferPos++] = (UInt32)(lenInBits); +} + +void CContext::Update(const Byte *data, size_t size) +{ + unsigned curBufferPos = _count2; + while (size--) + { + int pos = (int)(curBufferPos & 3); + if (pos == 0) + _buffer[curBufferPos >> 2] = 0; + _buffer[curBufferPos >> 2] |= ((UInt32)*data++) << (8 * (3 - pos)); + if (++curBufferPos == kBlockSize) + { + curBufferPos = 0; + CContextBase::UpdateBlock(_buffer, false); + } + } + _count2 = curBufferPos; +} + +void CContext::UpdateRar(Byte *data, size_t size, bool rar350Mode) +{ + bool returnRes = false; + unsigned curBufferPos = _count2; + while (size--) + { + int pos = (int)(curBufferPos & 3); + if (pos == 0) + _buffer[curBufferPos >> 2] = 0; + _buffer[curBufferPos >> 2] |= ((UInt32)*data++) << (8 * (3 - pos)); + if (++curBufferPos == kBlockSize) + { + curBufferPos = 0; + CContextBase::UpdateBlock(_buffer, returnRes); + if (returnRes) + for (int i = 0; i < kBlockSizeInWords; i++) + { + UInt32 d = _buffer[i]; + data[i * 4 + 0 - kBlockSize] = (Byte)(d); + data[i * 4 + 1 - kBlockSize] = (Byte)(d >> 8); + data[i * 4 + 2 - kBlockSize] = (Byte)(d >> 16); + data[i * 4 + 3 - kBlockSize] = (Byte)(d >> 24); + } + returnRes = rar350Mode; + } + } + _count2 = curBufferPos; +} + +void CContext::Final(Byte *digest) +{ + const UInt64 lenInBits = (_count << 9) + ((UInt64)_count2 << 3); + unsigned curBufferPos = _count2; + int pos = (int)(curBufferPos & 3); + curBufferPos >>= 2; + if (pos == 0) + _buffer[curBufferPos] = 0; + _buffer[curBufferPos++] |= ((UInt32)0x80) << (8 * (3 - pos)); + + while (curBufferPos != (16 - 2)) + { + curBufferPos &= 0xF; + if (curBufferPos == 0) + UpdateBlock(); + _buffer[curBufferPos++] = 0; + } + _buffer[curBufferPos++] = (UInt32)(lenInBits >> 32); + _buffer[curBufferPos++] = (UInt32)(lenInBits); + UpdateBlock(); + + int i; + for (i = 0; i < kDigestSizeInWords; i++) + { + UInt32 state = _state[i] & 0xFFFFFFFF; + *digest++ = (Byte)(state >> 24); + *digest++ = (Byte)(state >> 16); + *digest++ = (Byte)(state >> 8); + *digest++ = (Byte)(state); + } + Init(); +} + +/////////////////////////// +// Words version + +void CContext32::Update(const UInt32 *data, size_t size) +{ + while (size--) + { + _buffer[_count2++] = *data++; + if (_count2 == kBlockSizeInWords) + { + _count2 = 0; + UpdateBlock(); + } + } +} + +void CContext32::Final(UInt32 *digest) +{ + const UInt64 lenInBits = (_count << 9) + ((UInt64)_count2 << 5); + unsigned curBufferPos = _count2; + _buffer[curBufferPos++] = 0x80000000; + while (curBufferPos != (16 - 2)) + { + curBufferPos &= 0xF; + if (curBufferPos == 0) + UpdateBlock(); + _buffer[curBufferPos++] = 0; + } + _buffer[curBufferPos++] = (UInt32)(lenInBits >> 32); + _buffer[curBufferPos++] = (UInt32)(lenInBits); + GetBlockDigest(_buffer, digest); + Init(); +} + +}} |