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feyris-tan 2025-12-24 14:19:46 +01:00
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18
skyscraper8.sln.DotSettings.user
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skyscraper8/Skyscraper/Security/Cryptography/DvbCsa2.cs Normal file
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace skyscraper8.Skyscraper.Security.Cryptography
{
/// <summary>
/// Inspired by https://github.com/tsduck/tsduck/blob/master/src/libtsduck/crypto/tsDVBCSA2.cpp
/// </summary>
internal class DvbCsa2
{
public const int KEY_BITS = 64; //!< DVB CSA-2 control words size in bits.
public const int KEY_SIZE = KEY_BITS / 8; //!< DVB CSA-2 control words size in bytes.
public const int BLOCK_SIZE = 8;
public enum EntropyMode
{
FULL_CW, //!< Keep the full 64-bit control word.
REDUCE_ENTROPY //!< Reduce the entropy of the control word to 48 bits.
};
public DvbCsa2(EntropyMode mode = EntropyMode.REDUCE_ENTROPY)
{
SetEntropyMode(mode);
canProcessInPlace(true);
}
static readonly int[] sbox1 = {
2,0,1,1,2,3,3,0,
3,2,2,0,1,1,0,3,
0,3,3,0,2,2,1,1,
2,2,0,3,1,1,3,0
};
static readonly int[] sbox2 = {
3,1,0,2,2,3,3,0,
1,3,2,1,0,0,1,2,
3,1,0,3,3,2,0,2,
0,0,1,2,2,1,3,1
};
static readonly int[] sbox3 = {
2,0,1,2,2,3,3,1,
1,1,0,3,3,0,2,0,
1,3,0,1,3,0,2,2,
2,0,1,2,0,3,3,1
};
static readonly int[] sbox4 = {
3,1,2,3,0,2,1,2,
1,2,0,1,3,0,0,3,
1,0,3,1,2,3,0,3,
0,3,2,0,1,2,2,1
};
static readonly int[] sbox5 = {
2,0,0,1,3,2,3,2,
0,1,3,3,1,0,2,1,
2,3,2,0,0,3,1,1,
1,0,3,2,3,1,0,2
};
static readonly int[] sbox6 = {
0,1,2,3,1,2,2,0,
0,1,3,0,2,3,1,3,
2,3,0,2,3,0,1,1,
2,1,1,2,0,3,3,0
};
static readonly int[] sbox7 = {
0,3,2,2,3,0,0,1,
3,0,1,3,1,2,2,1,
1,0,3,3,0,1,1,2,
2,3,1,0,2,3,0,2
};
private void canProcessInPlace(bool b)
{
throw new NotImplementedException();
}
public void SetEntropyMode(EntropyMode mode)
{
_mode = mode;
}
public EntropyMode GetEntropyMode()
{
return _mode;
}
public static void ReduceCW(Span<byte> cw)
{
cw[3] = (byte)(cw[0] + cw[1] + cw[2]);
cw[7] = (byte)(cw[4] + cw[5] + cw[6]);
}
public static bool IsReducedCW(Span<byte> cw)
{
return cw[3] == (byte)(cw[0] + cw[1] + cw[2]) && cw[7] == (byte)(cw[4] + cw[5] + cw[6]);
}
protected static object Properties()
{
return new Tuple<string, int, int>("DVB-CSA2", BLOCK_SIZE, KEY_SIZE);
}
protected bool SetKeyImpl(byte[] newKey)
{
// Only one possible key size.
if (newKey.Length != KEY_SIZE)
{
return false;
}
// Preprocess control word
_key = new byte[newKey.Length];
Array.Copy(newKey, 0, _key, 0, newKey.Length);
if (_mode == EntropyMode.REDUCE_ENTROPY)
{
ReduceCW(_key);
}
// Block cipher key schedule
if (_block == null)
_block = new DvbBlockCipher();
_block.Init(_key);
// Stream cipher initialization
if (_stream == null)
_stream = new DvbStreamCipher();
_stream.Init(_key);
// Mark as initialized
_init = true;
return true;
}
protected static bool EncryptImpl(Span<byte> plain, int plain_length, Span<byte> cipher, int cipher_maxsize, ref int cipher_length)
{
throw new NotImplementedException();
}
protected bool DecryptImpl(Span<byte> cipher, int cipher_length, Span<byte> plain, int plain_maxsize, ref int plain_length)
{
throw new NotImplementedException();
}
private class DvbBlockCipher
{
private readonly byte[] key_perm = {
0x12, 0x24, 0x09, 0x07, 0x2A, 0x31, 0x1D, 0x15,
0x1C, 0x36, 0x3E, 0x32, 0x13, 0x21, 0x3B, 0x40,
0x18, 0x14, 0x25, 0x27, 0x02, 0x35, 0x1B, 0x01,
0x22, 0x04, 0x0D, 0x0E, 0x39, 0x28, 0x1A, 0x29,
0x33, 0x23, 0x34, 0x0C, 0x16, 0x30, 0x1E, 0x3A,
0x2D, 0x1F, 0x08, 0x19, 0x17, 0x2F, 0x3D, 0x11,
0x3C, 0x05, 0x38, 0x2B, 0x0B, 0x06, 0x0A, 0x2C,
0x20, 0x3F, 0x2E, 0x0F, 0x03, 0x26, 0x10, 0x37
};
// S-Box
private readonly byte[] block_sbox = {
0x3A, 0xEA, 0x68, 0xFE, 0x33, 0xE9, 0x88, 0x1A,
0x83, 0xCF, 0xE1, 0x7F, 0xBA, 0xE2, 0x38, 0x12,
0xE8, 0x27, 0x61, 0x95, 0x0C, 0x36, 0xE5, 0x70,
0xA2, 0x06, 0x82, 0x7C, 0x17, 0xA3, 0x26, 0x49,
0xBE, 0x7A, 0x6D, 0x47, 0xC1, 0x51, 0x8F, 0xF3,
0xCC, 0x5B, 0x67, 0xBD, 0xCD, 0x18, 0x08, 0xC9,
0xFF, 0x69, 0xEF, 0x03, 0x4E, 0x48, 0x4A, 0x84,
0x3F, 0xB4, 0x10, 0x04, 0xDC, 0xF5, 0x5C, 0xC6,
0x16, 0xAB, 0xAC, 0x4C, 0xF1, 0x6A, 0x2F, 0x3C,
0x3B, 0xD4, 0xD5, 0x94, 0xD0, 0xC4, 0x63, 0x62,
0x71, 0xA1, 0xF9, 0x4F, 0x2E, 0xAA, 0xC5, 0x56,
0xE3, 0x39, 0x93, 0xCE, 0x65, 0x64, 0xE4, 0x58,
0x6C, 0x19, 0x42, 0x79, 0xDD, 0xEE, 0x96, 0xF6,
0x8A, 0xEC, 0x1E, 0x85, 0x53, 0x45, 0xDE, 0xBB,
0x7E, 0x0A, 0x9A, 0x13, 0x2A, 0x9D, 0xC2, 0x5E,
0x5A, 0x1F, 0x32, 0x35, 0x9C, 0xA8, 0x73, 0x30,
0x29, 0x3D, 0xE7, 0x92, 0x87, 0x1B, 0x2B, 0x4B,
0xA5, 0x57, 0x97, 0x40, 0x15, 0xE6, 0xBC, 0x0E,
0xEB, 0xC3, 0x34, 0x2D, 0xB8, 0x44, 0x25, 0xA4,
0x1C, 0xC7, 0x23, 0xED, 0x90, 0x6E, 0x50, 0x00,
0x99, 0x9E, 0x4D, 0xD9, 0xDA, 0x8D, 0x6F, 0x5F,
0x3E, 0xD7, 0x21, 0x74, 0x86, 0xDF, 0x6B, 0x05,
0x8E, 0x5D, 0x37, 0x11, 0xD2, 0x28, 0x75, 0xD6,
0xA7, 0x77, 0x24, 0xBF, 0xF0, 0xB0, 0x02, 0xB7,
0xF8, 0xFC, 0x81, 0x09, 0xB1, 0x01, 0x76, 0x91,
0x7D, 0x0F, 0xC8, 0xA0, 0xF2, 0xCB, 0x78, 0x60,
0xD1, 0xF7, 0xE0, 0xB5, 0x98, 0x22, 0xB3, 0x20,
0x1D, 0xA6, 0xDB, 0x7B, 0x59, 0x9F, 0xAE, 0x31,
0xFB, 0xD3, 0xB6, 0xCA, 0x43, 0x72, 0x07, 0xF4,
0xD8, 0x41, 0x14, 0x55, 0x0D, 0x54, 0x8B, 0xB9,
0xAD, 0x46, 0x0B, 0xAF, 0x80, 0x52, 0x2C, 0xFA,
0x8C, 0x89, 0x66, 0xFD, 0xB2, 0xA9, 0x9B, 0xC0
};
// Permutations
private readonly byte[] block_perm = {
0x00, 0x02, 0x80, 0x82, 0x20, 0x22, 0xA0, 0xA2,
0x10, 0x12, 0x90, 0x92, 0x30, 0x32, 0xB0, 0xB2,
0x04, 0x06, 0x84, 0x86, 0x24, 0x26, 0xA4, 0xA6,
0x14, 0x16, 0x94, 0x96, 0x34, 0x36, 0xB4, 0xB6,
0x40, 0x42, 0xC0, 0xC2, 0x60, 0x62, 0xE0, 0xE2,
0x50, 0x52, 0xD0, 0xD2, 0x70, 0x72, 0xF0, 0xF2,
0x44, 0x46, 0xC4, 0xC6, 0x64, 0x66, 0xE4, 0xE6,
0x54, 0x56, 0xD4, 0xD6, 0x74, 0x76, 0xF4, 0xF6,
0x01, 0x03, 0x81, 0x83, 0x21, 0x23, 0xA1, 0xA3,
0x11, 0x13, 0x91, 0x93, 0x31, 0x33, 0xB1, 0xB3,
0x05, 0x07, 0x85, 0x87, 0x25, 0x27, 0xA5, 0xA7,
0x15, 0x17, 0x95, 0x97, 0x35, 0x37, 0xB5, 0xB7,
0x41, 0x43, 0xC1, 0xC3, 0x61, 0x63, 0xE1, 0xE3,
0x51, 0x53, 0xD1, 0xD3, 0x71, 0x73, 0xF1, 0xF3,
0x45, 0x47, 0xC5, 0xC7, 0x65, 0x67, 0xE5, 0xE7,
0x55, 0x57, 0xD5, 0xD7, 0x75, 0x77, 0xF5, 0xF7,
0x08, 0x0A, 0x88, 0x8A, 0x28, 0x2A, 0xA8, 0xAA,
0x18, 0x1A, 0x98, 0x9A, 0x38, 0x3A, 0xB8, 0xBA,
0x0C, 0x0E, 0x8C, 0x8E, 0x2C, 0x2E, 0xAC, 0xAE,
0x1C, 0x1E, 0x9C, 0x9E, 0x3C, 0x3E, 0xBC, 0xBE,
0x48, 0x4A, 0xC8, 0xCA, 0x68, 0x6A, 0xE8, 0xEA,
0x58, 0x5A, 0xD8, 0xDA, 0x78, 0x7A, 0xF8, 0xFA,
0x4C, 0x4E, 0xCC, 0xCE, 0x6C, 0x6E, 0xEC, 0xEE,
0x5C, 0x5E, 0xDC, 0xDE, 0x7C, 0x7E, 0xFC, 0xFE,
0x09, 0x0B, 0x89, 0x8B, 0x29, 0x2B, 0xA9, 0xAB,
0x19, 0x1B, 0x99, 0x9B, 0x39, 0x3B, 0xB9, 0xBB,
0x0D, 0x0F, 0x8D, 0x8F, 0x2D, 0x2F, 0xAD, 0xAF,
0x1D, 0x1F, 0x9D, 0x9F, 0x3D, 0x3F, 0xBD, 0xBF,
0x49, 0x4B, 0xC9, 0xCB, 0x69, 0x6B, 0xE9, 0xEB,
0x59, 0x5B, 0xD9, 0xDB, 0x79, 0x7B, 0xF9, 0xFB,
0x4D, 0x4F, 0xCD, 0xCF, 0x6D, 0x6F, 0xED, 0xEF,
0x5D, 0x5F, 0xDD, 0xDF, 0x7D, 0x7F, 0xFD, 0xFF
};
private int[] _kk; //57 items
public void Init(Span<byte> key)
{
int i, j, k;
int[] bit = new int[64];
int[] newbit = new int[64];
int[][] kb = new int[8][]; // original code was: int kb[9][8];
for (int init = 0; init < kb.Length; init++)
{
kb[init] = new int[9];
}
// 56 steps
// 56 key bytes kk(56)..kk(1) by key schedule from key
// kb(7,1) .. kb(7,8) = key(1) .. key(8)
kb[7][1] = key[0];
kb[7][2] = key[1];
kb[7][3] = key[2];
kb[7][4] = key[3];
kb[7][5] = key[4];
kb[7][6] = key[5];
kb[7][7] = key[6];
kb[7][8] = key[7];
// calculate kb[6] .. kb[1]
for (i = 0; i < 7; i++)
{
// 64 bit perm on kb
for (j = 0; j < 8; j++)
{
for (k = 0; k < 8; k++)
{
bit[j * 8 + k] = (kb[7 - i][1 + j] >> (7 - k)) & 1;
newbit[key_perm[j * 8 + k] - 1] = bit[j * 8 + k];
}
}
for (j = 0; j < 8; j++)
{
kb[6 - i][1 + j] = 0;
for (k = 0; k < 8; k++)
{
kb[6 - i][1 + j] |= newbit[j * 8 + k] << (7 - k);
}
}
}
// xor to give kk
for (i = 0; i < 7; i++)
{
for (j = 0; j < 8; j++)
{
_kk[1 + i * 8 + j] = kb[1 + i][1 + j] ^ i;
}
}
}
public void Encipher(Span<byte> bd, Span<byte> ib)
{
int i;
int sbox_in;
int sbox_out;
int perm_out;
int[] R = new int[9];
int next_R1;
R[1] = bd[0];
R[2] = bd[1];
R[3] = bd[2];
R[4] = bd[3];
R[5] = bd[4];
R[6] = bd[5];
R[7] = bd[6];
R[8] = bd[7];
// loop over kk[1]..kk[56]
for (i = 1; i <= 56; i++)
{
sbox_in = _kk[i] ^ R[8];
sbox_out = block_sbox[sbox_in];
perm_out = block_perm[sbox_out];
next_R1 = R[2];
R[2] = R[3] ^ R[1];
R[3] = R[4] ^ R[1];
R[4] = R[5] ^ R[1];
R[5] = R[6];
R[6] = R[7] ^ perm_out;
R[7] = R[8];
R[8] = R[1] ^ sbox_out;
R[1] = next_R1;
}
ib[0] = (byte)(R[1]);
ib[1] = (byte)(R[2]);
ib[2] = (byte)(R[3]);
ib[3] = (byte)(R[4]);
ib[4] = (byte)(R[5]);
ib[5] = (byte)(R[6]);
ib[6] = (byte)(R[7]);
ib[7] = (byte)(R[8]);
}
public void Decipher(Span<byte> ib, Span<byte> bd)
{
int i;
int sbox_in;
int sbox_out;
int perm_out;
int[] R = new int[9];
int next_R8;
R[1] = ib[0];
R[2] = ib[1];
R[3] = ib[2];
R[4] = ib[3];
R[5] = ib[4];
R[6] = ib[5];
R[7] = ib[6];
R[8] = ib[7];
// loop over kk[56]..kk[1]
for (i = 56; i > 0; i--)
{
sbox_in = _kk[i] ^ R[7];
sbox_out = block_sbox[sbox_in];
perm_out = block_perm[sbox_out];
next_R8 = R[7];
R[7] = R[6] ^ perm_out;
R[6] = R[5];
R[5] = R[4] ^ R[8] ^ sbox_out;
R[4] = R[3] ^ R[8] ^ sbox_out;
R[3] = R[2] ^ R[8] ^ sbox_out;
R[2] = R[1];
R[1] = R[8] ^ sbox_out;
R[8] = next_R8;
}
bd[0] = (byte)(R[1]);
bd[1] = (byte)(R[2]);
bd[2] = (byte)(R[3]);
bd[3] = (byte)(R[4]);
bd[4] = (byte)(R[5]);
bd[5] = (byte)(R[6]);
bd[6] = (byte)(R[7]);
bd[7] = (byte)(R[8]);
}
}
private class DvbStreamCipher
{
private int[] A; //11 bytes
private int[] B; //11 bytes
private int X;
private int Y;
private int Z;
private int D;
private int E;
private int F;
private int p;
private int q;
private int r;
public void Init(Span<byte> key)
{
A[1] = (key[0] >> 4) & 0x0F;
A[2] = (key[0] >> 0) & 0x0F;
A[3] = (key[1] >> 4) & 0x0F;
A[4] = (key[1] >> 0) & 0x0F;
A[5] = (key[2] >> 4) & 0x0F;
A[6] = (key[2] >> 0) & 0x0F;
A[7] = (key[3] >> 4) & 0x0F;
A[8] = (key[3] >> 0) & 0x0F;
A[9] = 0;
A[10] = 0;
B[1] = (key[4] >> 4) & 0x0F;
B[2] = (key[4] >> 0) & 0x0F;
B[3] = (key[5] >> 4) & 0x0F;
B[4] = (key[5] >> 0) & 0x0F;
B[5] = (key[6] >> 4) & 0x0F;
B[6] = (key[6] >> 0) & 0x0F;
B[7] = (key[7] >> 4) & 0x0F;
B[8] = (key[7] >> 0) & 0x0F;
B[9] = 0;
B[10] = 0;
X = 0;
Y = 0;
Z = 0;
D = 0;
E = 0;
F = 0;
p = 0;
q = 0;
r = 0;
}
public void Cipher(Span<byte> sb, Span<byte> cb)
{
bool init = sb != null;
int i, j;
int in1 = 0; // most significant nibble of input byte
int in2 = 0; // least significant nibble of input byte
int op;
int extra_B;
int s1, s2, s3, s4, s5, s6, s7;
int next_A1;
int next_B1;
int next_E;
// 8 bytes per operation
for (i = 0; i < 8; i++)
{
if (init)
{
in1 = (sb[i] >> 4) & 0x0F;
in2 = sb[i] & 0x0F;
}
op = 0;
// 2 bits per iteration
for (j = 0; j < 4; j++)
{
// from A[1]..A[10], 35 bits are selected as inputs to 7 s-boxes
// 5 bits input per s-box, 2 bits output per s-box
s1 = sbox1[(((A[4] >> 0) & 1) << 4) |
(((A[1] >> 2) & 1) << 3) |
(((A[6] >> 1) & 1) << 2) |
(((A[7] >> 3) & 1) << 1) |
(((A[9] >> 0) & 1) << 0)];
s2 = sbox2[(((A[2] >> 1) & 1) << 4) |
(((A[3] >> 2) & 1) << 3) |
(((A[6] >> 3) & 1) << 2) |
(((A[7] >> 0) & 1) << 1) |
(((A[9] >> 1) & 1) << 0)];
s3 = sbox3[(((A[1] >> 3) & 1) << 4) |
(((A[2] >> 0) & 1) << 3) |
(((A[5] >> 1) & 1) << 2) |
(((A[5] >> 3) & 1) << 1) |
(((A[6] >> 2) & 1) << 0)];
s4 = sbox4[(((A[3] >> 3) & 1) << 4) |
(((A[1] >> 1) & 1) << 3) |
(((A[2] >> 3) & 1) << 2) |
(((A[4] >> 2) & 1) << 1) |
(((A[8] >> 0) & 1) << 0)];
s5 = sbox5[(((A[5] >> 2) & 1) << 4) |
(((A[4] >> 3) & 1) << 3) |
(((A[6] >> 0) & 1) << 2) |
(((A[8] >> 1) & 1) << 1) |
(((A[9] >> 2) & 1) << 0)];
s6 = sbox6[(((A[3] >> 1) & 1) << 4) |
(((A[4] >> 1) & 1) << 3) |
(((A[5] >> 0) & 1) << 2) |
(((A[7] >> 2) & 1) << 1) |
(((A[9] >> 3) & 1) << 0)];
s7 = sbox7[(((A[2] >> 2) & 1) << 4) |
(((A[3] >> 0) & 1) << 3) |
(((A[7] >> 1) & 1) << 2) |
(((A[8] >> 2) & 1) << 1) |
(((A[8] >> 3) & 1) << 0)];
// use 4x4 xor to produce extra nibble for T3
extra_B =
(((B[3] & 1) << 3) ^
((B[6] & 2) << 2) ^
((B[7] & 4) << 1) ^
((B[9] & 8) >> 0)) |
(((B[6] & 1) << 2) ^
((B[8] & 2) << 1) ^
((B[3] & 8) >> 1) ^
((B[4] & 4) >> 0)) |
(((B[5] & 8) >> 2) ^
((B[8] & 4) >> 1) ^
((B[4] & 1) << 1) ^
((B[5] & 2) >> 0)) |
(((B[9] & 4) >> 2) ^
((B[6] & 8) >> 3) ^
((B[3] & 2) >> 1) ^
((B[8] & 1) >> 0));
// T1 = xor all inputs
// in1, in2, D are only used in T1 during initialisation,
// not generation
next_A1 = A[10] ^ X;
if (init)
{
next_A1 = next_A1 ^ D ^ ((j % 2) != 0 ? in2 : in1);
}
// T2 = xor all inputs
// in1,in2 are only used in T1 during initialisation, not generation
// if p=0, use this, if p=1, rotate the result left
next_B1 = B[7] ^ B[10] ^ Y;
if (init)
{
next_B1 = next_B1 ^ ((j % 2) != 0 ? in1 : in2);
}
// if p=1, rotate left
if (p != 0)
{
next_B1 = ((next_B1 << 1) | ((next_B1 >> 3) & 1)) & 0x0F;
}
// T3 = xor all inputs
D = E ^ Z ^ extra_B;
// T4 = sum, carry of Z + E + r
next_E = F;
if (q != 0)
{
F = Z + E + r;
// r is the carry
r = (F >> 4) & 1;
F = F & 0x0F;
}
else
{
F = E;
}
E = next_E;
A[10] = A[9];
A[9] = A[8];
A[8] = A[7];
A[7] = A[6];
A[6] = A[5];
A[5] = A[4];
A[4] = A[3];
A[3] = A[2];
A[2] = A[1];
A[1] = next_A1;
B[10] = B[9];
B[9] = B[8];
B[8] = B[7];
B[7] = B[6];
B[6] = B[5];
B[5] = B[4];
B[4] = B[3];
B[3] = B[2];
B[2] = B[1];
B[1] = next_B1;
X = ((s4 & 1) << 3) | ((s3 & 1) << 2) | (s2 & 2) | ((s1 & 2) >> 1);
Y = ((s6 & 1) << 3) | ((s5 & 1) << 2) | (s4 & 2) | ((s3 & 2) >> 1);
Z = ((s2 & 1) << 3) | ((s1 & 1) << 2) | (s6 & 2) | ((s5 & 2) >> 1);
p = (s7 & 2) >> 1;
q = (s7 & 1);
// require 4 loops per output byte
// 2 output bits are a function of the 4 bits of D
// xor 2 by 2
op = (op << 2) ^ ((((D ^ (D >> 1)) >> 1) & 2) | ((D ^ (D >> 1)) & 1));
}
// return input data during init
cb[i] = init ? sb[i] : (byte)(op);
}
}
}
private bool _init = false;
private EntropyMode _mode = EntropyMode.REDUCE_ENTROPY;
private byte[] _key; //KEY_SIZE elements;
private DvbBlockCipher _block;
private DvbStreamCipher _stream;
}
}

3
skyscraper8/VersionInfo.cs
View File

@ -4,7 +4,7 @@ namespace skyscraper8;
public class VersionInfo public class VersionInfo
{ {
private const int PUBLIC_RELEASE = 15; private const int PUBLIC_RELEASE = 16;
public static int GetPublicReleaseNumber() public static int GetPublicReleaseNumber()
{ {
@ -15,6 +15,7 @@ public class VersionInfo
{ {
try try
{ {
Assembly executingAssembly = typeof(VersionInfo).GetTypeInfo().Assembly; Assembly executingAssembly = typeof(VersionInfo).GetTypeInfo().Assembly;
AssemblyName assemblyName = executingAssembly.GetName(); AssemblyName assemblyName = executingAssembly.GetName();
Version version = assemblyName.Version; Version version = assemblyName.Version;