public static long DecodeIntValue(Asn1DecodeBuffer buffer, int length, bool signExtend)
{
var num = 0L;
if (length > 8)
{
throw new Exception("Asn1IntegerValueIsTooLarge");
}
for (var i = 0; i < length; i++)
{
var num2 = buffer.ReadByte();
if (num2 < 0)
{
throw new Exception("Asn1EndOfBufferException");
}
if ((i == 0) && signExtend)
{
num = (num2 > 0x7f) ? -1 : 0;
}
num = (num * 0x100L) + num2;
}
return(num);
}
public BigInteger DecodeValue(Asn1DecodeBuffer buffer, int length)
{
var ivalue = new byte[length];
if (length > MaxBigIntLen)
{
throw new Exception("Asn1 too big integer value");
}
for (var i = 0; i < length; ++i)
{
ivalue[i] = (byte)buffer.ReadByte();
}
var integer = new BigInteger();
if (length > 0)
{
integer.SetData(ivalue);
}
return(integer);
}