public static long DecodeIntValue(Asn1DecodeBuffer buffer, int length, bool signExtend)
{
var num = 0L;
if (length > 8)
{
throw ExceptionUtility.CryptographicException(Resources.Asn1IntegerValueIsTooLarge);
}
for (var i = 0; i < length; i++)
{
var num2 = buffer.ReadByte();
if (num2 < 0)
{
throw ExceptionUtility.CryptographicException(Resources.Asn1EndOfBufferException, buffer.ByteCount);
}
if ((i == 0) && signExtend)
{
num = (num2 > 0x7f) ? -1 : 0;
}
num = (num * 0x100L) + num2;
}
return(num);
}
public static long DecodeIntValue(Asn1DecodeBuffer buffer, int length, bool signExtend)
{
var num = 0L;
if (length > 8)
{
throw ExceptionUtility.CryptographicException(Resources.Asn1IntegerValueIsTooLarge);
}
for (var i = 0; i < length; i++)
{
var num2 = buffer.ReadByte();
if (num2 < 0)
{
throw ExceptionUtility.CryptographicException(Resources.Asn1EndOfBufferException, buffer.ByteCount);
}
if ((i == 0) && signExtend)
{
num = (num2 > 0x7f) ? -1 : 0;
}
num = (num * 0x100L) + num2;
}
return num;
}
private static void ReadSegment(Asn1DecodeBuffer buffer, StringBuilder sb, int len)
{
if ((len % 2) != 0)
{
throw ExceptionUtility.CryptographicException(Resources.Asn1InvalidLengthException);
}
while (len > 0)
{
var num = buffer.Read();
if (num == -1)
{
throw ExceptionUtility.CryptographicException(Resources.Asn1EndOfBufferException, buffer.ByteCount);
}
var num2 = num * 0x100;
len--;
num = buffer.Read();
if (num == -1)
{
throw ExceptionUtility.CryptographicException(Resources.Asn1EndOfBufferException, buffer.ByteCount);
}
num2 += num;
len--;
sb.Append((char)num2);
}
}
public BigInteger DecodeValue(Asn1DecodeBuffer buffer, int length)
{
var ivalue = new byte[length];
if (length > MaxBigIntLen)
{
throw ExceptionUtility.CryptographicException(Resources.Asn1TooBigIntegerValue, length);
}
for (var i = 0; i < length; ++i)
{
ivalue[i] = (byte)buffer.ReadByte();
}
var integer = new BigInteger();
if (length > 0)
{
integer.SetData(ivalue);
}
return(integer);
}
public BigInteger DecodeValue(Asn1DecodeBuffer buffer, int length)
{
var ivalue = new byte[length];
if (length > MaxBigIntLen)
{
throw ExceptionUtility.CryptographicException(Resources.Asn1TooBigIntegerValue, length);
}
for (var i = 0; i < length; ++i)
{
ivalue[i] = (byte)buffer.ReadByte();
}
var integer = new BigInteger();
if (length > 0)
{
integer.SetData(ivalue);
}
return integer;
}
private static void ReadSegment(Asn1DecodeBuffer buffer, StringBuilder sb, int len)
{
if ((len % 2) != 0)
{
throw ExceptionUtility.CryptographicException(Resources.Asn1InvalidLengthException);
}
while (len > 0)
{
var num = buffer.Read();
if (num == -1)
{
throw ExceptionUtility.CryptographicException(Resources.Asn1EndOfBufferException, buffer.ByteCount);
}
var num2 = num * 0x100;
len--;
num = buffer.Read();
if (num == -1)
{
throw ExceptionUtility.CryptographicException(Resources.Asn1EndOfBufferException, buffer.ByteCount);
}
num2 += num;
len--;
sb.Append((char)num2);
}
}
