private static string DeencapsulateString(string encapsulated)
{
StringBuilder stringBuilder = new StringBuilder(encapsulated.Length);
int i = 0;
while (i < encapsulated.Length)
{
char c = encapsulated[i];
if (c != '+')
{
if (c != '_')
{
goto IL_48;
}
stringBuilder.Append('/');
}
else
{
char value;
if (!SmtpProxyAddress.ConvertTwoHexCharToChar(encapsulated, i + 1, out value))
{
goto IL_48;
}
stringBuilder.Append(value);
i += 2;
}
IL_56:
i++;
continue;
IL_48:
stringBuilder.Append(encapsulated[i]);
goto IL_56;
}
return(stringBuilder.ToString());
}
private static string DeencapsulateUTF8String(string encapsulated)
{
byte[] array = new byte[encapsulated.Length];
int num = 0;
int i = 0;
while (i < encapsulated.Length)
{
char c = encapsulated[i];
if (c != '+')
{
if (c != '_')
{
goto IL_4E;
}
array[num] = 47;
num++;
}
else
{
char c2;
if (!SmtpProxyAddress.ConvertTwoHexCharToChar(encapsulated, i + 1, out c2))
{
goto IL_4E;
}
array[num] = (byte)c2;
i += 2;
num++;
}
IL_6D:
i++;
continue;
IL_4E:
if (encapsulated[i] > 'ÿ')
{
return(null);
}
array[num] = (byte)encapsulated[i];
num++;
goto IL_6D;
}
string result;
try
{
Encoding encoding = new UTF8Encoding(false, true);
result = encoding.GetString(array, 0, num);
}
catch (DecoderFallbackException)
{
result = null;
}
return(result);
}