public static RSAParameters ImportRSAPublicKey(string buf)
{
RSAParameters rsaParameters = new RSACryptoServiceProvider().ExportParameters(false);
byte[] buffer = Convert.FromBase64String(string.Join(string.Empty, ((IEnumerable <string>)buf.Split(Environment.NewLine.ToArray <char>())).Where <string>(line => !line.Trim().StartsWith("-")).ToArray <string>()));
MemoryStream memoryStream = new MemoryStream();
memoryStream.Write(buffer, 0, buffer.Length);
memoryStream.Seek(0L, SeekOrigin.Begin);
using (BinaryReader stream = new BinaryReader(memoryStream))
{
if (stream.ReadByte() != 48)
{
return(rsaParameters);
}
UASecurity.DecodeLength(stream);
byte[] numArray = UASecurity.DecodeIntBigEndian(stream);
if (numArray.Length != 1 || numArray[0] > 0)
{
return(rsaParameters);
}
rsaParameters.Modulus = UASecurity.DecodeIntBigEndian(stream);
rsaParameters.Exponent = UASecurity.DecodeIntBigEndian(stream);
UASecurity.DecodeIntBigEndian(stream);
UASecurity.DecodeIntBigEndian(stream);
UASecurity.DecodeIntBigEndian(stream);
UASecurity.DecodeIntBigEndian(stream);
UASecurity.DecodeIntBigEndian(stream);
UASecurity.DecodeIntBigEndian(stream);
}
return(rsaParameters);
}
private static byte[] DecodeIntBigEndian(BinaryReader stream)
{
if (stream.ReadByte() != 2)
{
return(null);
}
int length = UASecurity.DecodeLength(stream);
if (length < 0)
{
return(null);
}
byte[] numArray = new byte[length];
for (int index = 0; index < length; ++index)
{
numArray[index] = stream.ReadByte();
}
return(numArray);
}
