/// <summary>对指定的对象标识符 (OID) 进行编码。</summary>
/// <returns>包含编码 OID 的字节数组。</returns>
/// <param name="str">要进行编码的 OID。</param>
/// <exception cref="T:System.ArgumentNullException">
/// <paramref name="str" /> 参数为 null。</exception>
/// <exception cref="T:System.Security.Cryptography.CryptographicUnexpectedOperationException">对 OID 进行编码时出现错误。</exception>
public static byte[] EncodeOID(string str)
{
if (str == null)
throw new ArgumentNullException("str");
char[] chArray = new char[1]{ '.' };
string[] strArray = str.Split(chArray);
uint[] numArray1 = new uint[strArray.Length];
for (int index = 0; index < strArray.Length; ++index)
numArray1[index] = (uint) int.Parse(strArray[index], (IFormatProvider) CultureInfo.InvariantCulture);
byte[] numArray2 = new byte[numArray1.Length * 5];
int destinationIndex = 0;
if (numArray1.Length < 2)
throw new CryptographicUnexpectedOperationException(Environment.GetResourceString("Cryptography_InvalidOID"));
byte[] numArray3 = CryptoConfig.EncodeSingleOIDNum(numArray1[0] * 40U + numArray1[1]);
Array.Copy((Array) numArray3, 0, (Array) numArray2, destinationIndex, numArray3.Length);
int num = destinationIndex + numArray3.Length;
for (int index = 2; index < numArray1.Length; ++index)
{
byte[] numArray4 = CryptoConfig.EncodeSingleOIDNum(numArray1[index]);
Buffer.InternalBlockCopy((Array) numArray4, 0, (Array) numArray2, num, numArray4.Length);
num += numArray4.Length;
}
if (num > (int) sbyte.MaxValue)
throw new CryptographicUnexpectedOperationException(Environment.GetResourceString("Cryptography_Config_EncodedOIDError"));
byte[] numArray5 = new byte[num + 2];
numArray5[0] = (byte) 6;
numArray5[1] = (byte) num;
Buffer.InternalBlockCopy((Array) numArray2, 0, (Array) numArray5, 2, num);
return numArray5;
}