/// <summary>
///
/// </summary>
/// <param name="privateKeyBytes"></param>
/// <returns></returns>
private static RSACryptoServiceProvider DecodeRsaPrivateKey(byte[] privateKeyBytes)
{
RSACryptoServiceProvider provider2;
MemoryStream input = new MemoryStream(privateKeyBytes);
BinaryReader rd = new BinaryReader(input);
try
{
switch (rd.ReadUInt16())
{
case 0x8130:
rd.ReadByte();
break;
case 0x8230:
rd.ReadInt16();
break;
default:
return(null);
}
if (rd.ReadUInt16() != 0x102)
{
return(null);
}
if (rd.ReadByte() > 0)
{
return(null);
}
CspParameters parameters = new CspParameters();
parameters.Flags = CspProviderFlags.NoFlags;
parameters.KeyContainerName = Guid.NewGuid().ToString().ToUpperInvariant();
parameters.ProviderType = ((Environment.OSVersion.Version.Major > 5) || ((Environment.OSVersion.Version.Major == 5) && (Environment.OSVersion.Version.Minor >= 1))) ? 0x18 : 1;
RSAParameters parameters2 = new RSAParameters();
parameters2.Modulus = rd.ReadBytes(Helpers.DecodeIntegerSize(rd));
RSAParameterTraits traits = new RSAParameterTraits(parameters2.Modulus.Length * 8);
parameters2.Modulus = Helpers.AlignBytes(parameters2.Modulus, traits.size_Mod);
parameters2.Exponent = Helpers.AlignBytes(rd.ReadBytes(Helpers.DecodeIntegerSize(rd)), traits.size_Exp);
parameters2.D = Helpers.AlignBytes(rd.ReadBytes(Helpers.DecodeIntegerSize(rd)), traits.size_D);
parameters2.P = Helpers.AlignBytes(rd.ReadBytes(Helpers.DecodeIntegerSize(rd)), traits.size_P);
parameters2.Q = Helpers.AlignBytes(rd.ReadBytes(Helpers.DecodeIntegerSize(rd)), traits.size_Q);
parameters2.DP = Helpers.AlignBytes(rd.ReadBytes(Helpers.DecodeIntegerSize(rd)), traits.size_DP);
parameters2.DQ = Helpers.AlignBytes(rd.ReadBytes(Helpers.DecodeIntegerSize(rd)), traits.size_DQ);
parameters2.InverseQ = Helpers.AlignBytes(rd.ReadBytes(Helpers.DecodeIntegerSize(rd)), traits.size_InvQ);
RSACryptoServiceProvider provider = new RSACryptoServiceProvider(parameters);
provider.ImportParameters(parameters2);
provider2 = provider;
}
catch (Exception ex)
{
provider2 = null;
}
finally
{
rd.Close();
}
return(provider2);
}
/// <summary>
///
/// </summary>
/// <param name="publicKeyBytes"></param>
/// <returns></returns>
private static RSACryptoServiceProvider DecodePublicKey(byte[] publicKeyBytes)
{
RSACryptoServiceProvider provider2;
MemoryStream input = new MemoryStream(publicKeyBytes);
BinaryReader rd = new BinaryReader(input);
byte[] b = new byte[] { 0x30, 13, 6, 9, 0x2a, 0x86, 0x48, 0x86, 0xf7, 13, 1, 1, 1, 5, 0 };
byte[] buffer2 = new byte[15];
try
{
switch (rd.ReadUInt16())
{
case 0x8130:
rd.ReadByte();
break;
case 0x8230:
rd.ReadInt16();
break;
default:
Debug.Assert(false);
return(null);
}
if (Helpers.CompareBytearrays(rd.ReadBytes(15), b))
{
switch (rd.ReadUInt16())
{
case 0x8103:
rd.ReadByte();
goto Label_00CF;
case 0x8203:
rd.ReadInt16();
goto Label_00CF;
}
}
return(null);
Label_00CF:
if (rd.ReadByte() > 0)
{
Debug.Assert(false);
return(null);
}
ushort num2 = rd.ReadUInt16();
if (num2 == 0x8130)
{
rd.ReadByte();
}
else if (num2 == 0x8230)
{
rd.ReadInt16();
}
else
{
return(null);
}
CspParameters parameters = new CspParameters();
parameters.Flags = CspProviderFlags.NoFlags;
parameters.KeyContainerName = Guid.NewGuid().ToString().ToUpperInvariant();
parameters.ProviderType = ((Environment.OSVersion.Version.Major > 5) || ((Environment.OSVersion.Version.Major == 5) && (Environment.OSVersion.Version.Minor >= 1))) ? 0x18 : 1;
RSACryptoServiceProvider provider = new RSACryptoServiceProvider(parameters);
RSAParameters parameters2 = new RSAParameters();
parameters2.Modulus = rd.ReadBytes(Helpers.DecodeIntegerSize(rd));
RSAParameterTraits traits = new RSAParameterTraits(parameters2.Modulus.Length * 8);
parameters2.Modulus = Helpers.AlignBytes(parameters2.Modulus, traits.size_Mod);
parameters2.Exponent = Helpers.AlignBytes(rd.ReadBytes(Helpers.DecodeIntegerSize(rd)), traits.size_Exp);
provider.ImportParameters(parameters2);
provider2 = provider;
}
catch (Exception)
{
Debug.Assert(false);
provider2 = null;
}
finally
{
rd.Close();
}
return(provider2);
}
