diff options
| -rw-r--r-- | src/stream/turing/turing.cpp | 27 |
1 files changed, 20 insertions, 7 deletions
diff --git a/src/stream/turing/turing.cpp b/src/stream/turing/turing.cpp index 82e3aa2bb..619ef6682 100644 --- a/src/stream/turing/turing.cpp +++ b/src/stream/turing/turing.cpp @@ -210,13 +210,26 @@ void Turing::generate() */ u32bit Turing::fixedS(u32bit W) { - for(size_t i = 0; i != 4; ++i) - { - byte B = SBOX[get_byte(i, W)]; - W ^= rotate_left(Q_BOX[B], i*8); - W &= rotate_right(0x00FFFFFF, i*8); - W |= B << (24-i*8); - } + byte B = SBOX[get_byte(0, W)]; + W ^= Q_BOX[B]; + W &= 0x00FFFFFF; + W |= B << 24; + + B = SBOX[get_byte(1, W)]; + W ^= rotate_left(Q_BOX[B], 8); + W &= 0xFF00FFFF; + W |= B << 16; + + B = SBOX[get_byte(2, W)]; + W ^= rotate_left(Q_BOX[B], 16); + W &= 0xFFFF00FF; + W |= B << 8; + + B = SBOX[get_byte(3, W)]; + W ^= rotate_left(Q_BOX[B], 24); + W &= 0xFFFFFF00; + W |= B; + return W; } |