private byte[] pkcs1unpad(byte[] Src, int N, Pkcs1PadType Type)
{
int I = 0;
while (I < Src.Length && Src[I] == 0)
{
++I;
}
if (Src.Length - I != N - 1 || Src[I] > 2)
{
Console.WriteLine("PKCS#1 unpad: i={0}, expected src[i]==[0,1,2], got src[i]={1}", I, Src[I].ToString("X"));
return(null);
}
++I;
while (Src[I] != 0)
{
if (++I >= Src.Length)
{
Console.WriteLine("PKCS#1 unpad: i={0}, src[i-1]!=0 (={1})", I, Src[I - 1].ToString("X"));
}
}
byte[] Bytes = new byte[Src.Length - I - 1];
for (int P = 0; ++I < Src.Length; P++)
{
Bytes[P] = Src[I];
}
return(Bytes);
}
private byte[] DoDecrypt(DoCalculateionDelegate method, byte[] src, Pkcs1PadType type)
{
try
{
BigInteger c = new BigInteger(src);
BigInteger m = method(c);
if (m == 0)
{
return(null);
}
int bl = GetBlockSize();
byte[] data = m.ToByteArray();
Array.Reverse(data);
byte[] bytes = Pkcs1Unpad(data, bl, type);
return(bytes);
}
catch
{
return(null);
}
}
private byte[] pkcs1pad(byte[] src, int n, Pkcs1PadType type)
{
byte[] bytes = new byte[n];
int i = src.Length - 1;
while (i >= 0 && n > 11)
{
bytes[--n] = src[i--];
}
bytes[--n] = 0;
while (n > 2)
{
byte x = 0;
switch (type)
{
case Pkcs1PadType.FullByte: x = 0xFF; break;
case Pkcs1PadType.RandomByte: x = Randomizer.NextByte(1, 255); break;
}
bytes[--n] = x;
}
bytes[--n] = (byte)type;
bytes[--n] = 0;
return(bytes);
}
private byte[] DoEncrypt(DoCalculateionDelegate Method, byte[] Src, Pkcs1PadType type)
{
try
{
int Bl = GetBlockSize();
byte[] PaddedBytes = pkcs1pad(Src, Bl, type);
BigInteger M = new BigInteger(PaddedBytes);
if (M == 0)
{
return(null);
}
BigInteger C = Method(M);
if (C == 0)
{
return(null);
}
return(C.getBytes());
}
catch
{
return(null);
}
}
private byte[] pkcs1pad(byte[] Src, int N, Pkcs1PadType Type)
{
byte[] Bytes = new byte[N];
int I = Src.Length - 1;
while (I >= 0 && N > 11)
{
Bytes[--N] = Src[I--];
}
Bytes[--N] = 0;
while (N > 2)
{
byte x = 0;
switch (Type)
{
case Pkcs1PadType.FullByte: x = 0xFF; break;
case Pkcs1PadType.RandomByte: x = Randomizer.NextByte(1, 255); break;
}
Bytes[--N] = x;
}
Bytes[--N] = (byte)Type;
Bytes[--N] = 0;
return(Bytes);
}
private byte[] Pkcs1pad(byte[] src, int n, Pkcs1PadType type)
{
var bytes = new byte[n];
var i = src.Length - 1;
while (i >= 0 && n > 11)
{
bytes[--n] = src[i--];
}
bytes[--n] = 0;
while (n > 2)
{
byte x = 0;
switch (type)
{
case Pkcs1PadType.FullByte: x = 0xFF; break;
case Pkcs1PadType.RandomByte: x = EncryptionUtilities.NextByte(1, 255); break;
}
bytes[--n] = x;
}
bytes[--n] = (byte)type;
bytes[--n] = 0;
return(bytes);
}
private byte[] DoEncrypt(DoCalculateionDelegate method, byte[] src, Pkcs1PadType type)
{
try
{
int bl = this.GetBlockSize();
byte[] paddedBytes = this.pkcs1pad(src, bl, type);
BigInteger m = new BigInteger(paddedBytes);
if (m == 0)
{
return(null);
}
BigInteger c = method(m);
if (c == 0)
{
return(null);
}
return(c.getBytes());
}
catch
{
return(null);
}
}
private byte[] DoEncrypt(DoCalculateionDelegate method, byte[] src, Pkcs1PadType type)
{
try
{
int bl = GetBlockSize();
byte[] paddedBytes = Pkcs1Pad(src, bl, type);
Array.Reverse(paddedBytes);
BigInteger m = new BigInteger(paddedBytes);
if (m == 0)
{
return(null);
}
BigInteger c = method(m);
byte[] data = c.ToByteArray();
if (data[data.Length - 1] == 0)
{
Array.Resize(ref data, data.Length - 1);
}
Array.Reverse(data);
return(c == 0 ? null : data);
}
catch
{
return(null);
}
}
private byte[] pkcs1unpad(byte[] src, int n, Pkcs1PadType type)
{
int i = 0;
while (i < src.Length && src[i] == 0)
{
++i;
}
if (src.Length - i != n - 1 || src[i] > 2)
{
Console.WriteLine("PKCS#1 unpad: i={0}, expected src[i]==[0,1,2], got src[i]={1}", i, src[i].ToString("X"));
return(null);
}
++i;
while (src[i] != 0)
{
if (++i >= src.Length)
{
Console.WriteLine("PKCS#1 unpad: i={0}, src[i-1]!=0 (={1})", i, src[i - 1].ToString("X"));
}
}
byte[] bytes = new byte[src.Length - i - 1];
for (int p = 0; ++i < src.Length; p++)
{
bytes[p] = src[i];
}
return(bytes);
}
private byte[] DoDecrypt(DoCalculateionDelegate method, byte[] src, Pkcs1PadType type)
{
try
{
var c = new BigInteger(src);
var m = method(c);
if (m == 0)
{
return(null);
}
var bl = GetBlockSize();
var bytes = pkcs1unpad(m.getBytes(), bl);
return(bytes);
}
catch
{
return(null);
}
}
private byte[] DoDecrypt(DoCalculateionDelegate Method, byte[] Src, Pkcs1PadType Type)
{
try
{
BigInteger C = new BigInteger(Src);
BigInteger M = Method(C);
if (M == 0)
{
return(null);
}
int Bl = GetBlockSize();
byte[] Bytes = pkcs1unpad(M.getBytes(), Bl, Type);
return(Bytes);
}
catch
{
return(null);
}
}
private byte[] DoDecrypt(DoCalculateionDelegate method, byte[] src, Pkcs1PadType type)
{
try
{
BigInteger c = new BigInteger(src);
BigInteger m = method(c);
if (m == 0)
{
return(null);
}
int bl = this.GetBlockSize();
byte[] bytes = this.pkcs1unpad(m.getBytes(), bl, type);
return(bytes);
}
catch
{
return(null);
}
}
private byte[] DoEncrypt(DoCalculateionDelegate method, byte[] src, Pkcs1PadType type)
{
try
{
int bl = GetBlockSize();
byte[] paddedBytes = Pkcs1Pad(src, bl, type);
Array.Reverse(paddedBytes);
BigInteger m = new BigInteger(paddedBytes);
if (m == 0)
return null;
BigInteger c = method(m);
byte[] data = c.ToByteArray();
if (data[data.Length - 1] == 0)
Array.Resize(ref data, data.Length - 1);
Array.Reverse(data);
return c == 0 ? null : data;
}
catch
{
return null;
}
}
private byte[] pkcs1pad(byte[] src, int n, Pkcs1PadType type)
{
byte[] bytes = new byte[n];
int i = src.Length - 1;
while (i >= 0 && n > 11)
{
bytes[--n] = src[i--];
}
bytes[--n] = 0;
while (n > 2)
{
byte x = 0;
switch (type)
{
case Pkcs1PadType.FullByte: x = 0xFF; break;
case Pkcs1PadType.RandomByte: x = Randomizer.NextByte(1, 255); break;
}
bytes[--n] = x;
}
bytes[--n] = (byte)type;
bytes[--n] = 0;
return bytes;
}
private static byte[] Pkcs1Pad(IList<byte> src, int n, Pkcs1PadType type)
{
byte[] bytes = new byte[n];
int i = src.Count - 1;
while (i >= 0 && n > 11)
bytes[--n] = src[i--];
bytes[--n] = 0;
while (n > 2)
{
byte x = 0;
switch (type)
{
case Pkcs1PadType.FullByte:
x = 0xFF;
break;
case Pkcs1PadType.RandomByte:
x = Randomizer.NextByte(1, 255);
break;
}
bytes[--n] = x;
}
bytes[--n] = (byte) type;
bytes[--n] = 0;
return bytes;
}
private byte[] DoEncrypt(DoCalculateionDelegate method, byte[] src, Pkcs1PadType type)
{
try
{
int bl = this.GetBlockSize();
byte[] paddedBytes = this.pkcs1pad(src, bl, type);
BigInteger m = new BigInteger(paddedBytes);
if (m == 0)
{
return null;
}
BigInteger c = method(m);
if (c == 0)
{
return null;
}
return c.getBytes();
}
catch
{
return null;
}
}
private static byte[] Pkcs1Unpad(byte[] src, int n, Pkcs1PadType type)
{
int i = 0;
while (i < src.Length && src[i] == 0)
++i;
if (src.Length - i != n - 1 || src[i] > 2)
{
Console.WriteLine("PKCS#1 unpad: i={0}, expected src[i]==[0,1,2], got src[i]={1}", i,
src[i].ToString("X"));
return null;
}
++i;
while (src[i] != 0)
if (++i >= src.Length)
Console.WriteLine("PKCS#1 unpad: i={0}, src[i-1]!=0 (={1})", i, src[i - 1].ToString("X"));
byte[] bytes = new byte[src.Length - i - 1];
for (int p = 0; ++i < src.Length; p++)
bytes[p] = src[i];
return bytes;
}
private byte[] DoDecrypt(DoCalculateionDelegate method, byte[] src, Pkcs1PadType type)
{
try
{
BigInteger c = new BigInteger(src);
BigInteger m = method(c);
if (m == 0)
return null;
int bl = GetBlockSize();
byte[] data = m.ToByteArray();
Array.Reverse(data);
byte[] bytes = Pkcs1Unpad(data, bl, type);
return bytes;
}
catch
{
return null;
}
}
private byte[] DoDecrypt(DoCalculateionDelegate method, byte[] src, Pkcs1PadType type)
{
try
{
BigInteger c = new BigInteger(src);
BigInteger m = method(c);
if (m == 0)
{
return null;
}
int bl = this.GetBlockSize();
byte[] bytes = this.pkcs1unpad(m.getBytes(), bl, type);
return bytes;
}
catch
{
return null;
}
}
