public static RSAParametersEx?Parse(byte[] value)
{
//https://stackoverflow.com/questions/1162504/decrypting-with-private-key-from-pem-file-in-c-sharp-with-net-crypto-library/1162519#1162519
using (var memoryStream = new MemoryStream(value))
using (var reader = new BinaryReader(memoryStream))
{
var result = new RSAParametersEx();
var twoBytes = reader.ReadUInt16();
if (twoBytes == 0x8130) //data read as little endian order (actual data order for Sequence is 30 81)
{
reader.ReadByte(); //advance 1 byte
}
else if (twoBytes == 0x8230)
{
reader.ReadInt16(); //advance 2 bytes
}
else
{
throw new ArgumentException();
}
twoBytes = reader.ReadUInt16();
if (twoBytes != 0x0102) //version number
{
return(null);
}
if (reader.ReadByte() != 0x00)
{
return(null);
}
var size = GetIntegerSize(reader);
result.Modulus = reader.ReadBytes(size);
size = GetIntegerSize(reader);
result.Exponent = reader.ReadBytes(size);
size = GetIntegerSize(reader);
result.D = reader.ReadBytes(size);
size = GetIntegerSize(reader);
result.P = reader.ReadBytes(size);
size = GetIntegerSize(reader);
result.Q = reader.ReadBytes(size);
size = GetIntegerSize(reader);
result.DP = reader.ReadBytes(size);
size = GetIntegerSize(reader);
result.DQ = reader.ReadBytes(size);
size = GetIntegerSize(reader);
result.InverseQ = reader.ReadBytes(size);
return(result);
}
}
private static string ToJson(RSAParametersEx parameters)
{
return(JsonConvert.SerializeObject(parameters, _jsonSettings));
}