/// <summary>Encodes the specified object identifier (OID).</summary>
/// <returns>A byte array containing the encoded OID.</returns>
/// <param name="str">The OID to encode. </param>
/// <exception cref="T:System.ArgumentNullException">The <paramref name="str" /> parameter is null. </exception>
/// <exception cref="T:System.Security.Cryptography.CryptographicUnexpectedOperationException">An error occurred while encoding the OID. </exception>
public static byte[] EncodeOID(string str)
{
if (str == null)
{
throw new ArgumentNullException("str");
}
char[] separator = new char[]
{
'.'
};
string[] array = str.Split(separator);
if (array.Length < 2)
{
throw new CryptographicUnexpectedOperationException(Locale.GetText("OID must have at least two parts"));
}
byte[] array2 = new byte[str.Length];
try
{
byte b = Convert.ToByte(array[0]);
byte b2 = Convert.ToByte(array[1]);
array2[2] = Convert.ToByte((int)(b * 40 + b2));
}
catch
{
throw new CryptographicUnexpectedOperationException(Locale.GetText("Invalid OID"));
}
int num = 3;
for (int i = 2; i < array.Length; i++)
{
long num2 = Convert.ToInt64(array[i]);
if (num2 > 127L)
{
byte[] array3 = CryptoConfig.EncodeLongNumber(num2);
Buffer.BlockCopy(array3, 0, array2, num, array3.Length);
num += array3.Length;
}
else
{
array2[num++] = Convert.ToByte(num2);
}
}
int num3 = 2;
byte[] array4 = new byte[num];
array4[0] = 6;
if (num > 127)
{
throw new CryptographicUnexpectedOperationException(Locale.GetText("OID > 127 bytes"));
}
array4[1] = Convert.ToByte(num - 2);
Buffer.BlockCopy(array2, num3, array4, num3, num - num3);
return(array4);
}