public void ParseBuffer()
{
AssertNextValueIs(SequenceTag);
byte prefixLength = TakeBuffer();
BigInteger bodyLength = EncodingUtility.CalculateValue(TakeBuffer(2));
int bufferLen = byteBuffer.Count();
if (!bodyLength.Equals(bufferLen))
{
ThrowFormatException(bodyLength, bufferLen);
}
AssertNextValueIs(IntTag);
AssertNextValueIs(0x01);
AssertNextValueIs(Version0);
Modulus = GetNextVariableValue();
Exponent = GetNextVariableValue();
D = GetNextVariableValue();
P = GetNextVariableValue();
Q = GetNextVariableValue();
DP = GetNextVariableValue();
DQ = GetNextVariableValue();
InverseQ = GetNextVariableValue();
}
private static string[] ExtractPQ(RSAParameters key)
{
return(new string[]
{
EncodingUtility.CalculateValue(key.P).ToString(),
EncodingUtility.CalculateValue(key.Q).ToString()
});
}
public static void WriteXMLDocument(StringBuilder stringBuilder, RSAParameters key)
{
stringBuilder.AppendLine($"<RSAKeyValue>");
stringBuilder.AppendLine($" <Modulus>{EncodingUtility.CalculateValue(key.Modulus)}</Modulus>");
stringBuilder.AppendLine($" <Exponent>{EncodingUtility.CalculateValue(key.Exponent)}</Exponent>");
stringBuilder.AppendLine($" <P>{EncodingUtility.CalculateValue(key.P)}</P>");
stringBuilder.AppendLine($" <Q>{EncodingUtility.CalculateValue(key.Q)}</Q>");
stringBuilder.AppendLine($" <DP>{EncodingUtility.CalculateValue(key.DP)}</DP>");
stringBuilder.AppendLine($" <DQ>{EncodingUtility.CalculateValue(key.DQ)}</DQ>");
stringBuilder.AppendLine($" <InverseQ>{EncodingUtility.CalculateValue(key.InverseQ)}</InverseQ>");
stringBuilder.AppendLine($" <D>{EncodingUtility.CalculateValue(key.D)}</D>");
stringBuilder.AppendLine($"</RSAKeyValue>");
stringBuilder.Append(Environment.NewLine);
}
private BigInteger GetNextVariableValue()
{
AssertNextValueIs(IntTag);
int readSize = 0;
byte variableSize = TakeBuffer();
if (variableSize > 127)
{
if (variableSize.Equals(0x81))
{
readSize = TakeBuffer();
}
else if (variableSize.Equals(0x82))
{
readSize = (int)EncodingUtility.CalculateValue(TakeBuffer(2));
}
else if (variableSize.Equals(0x83))
{
readSize = (int)EncodingUtility.CalculateValue(TakeBuffer(3));
}
else if (variableSize.Equals(0x84))
{
readSize = (int)EncodingUtility.CalculateValue(TakeBuffer(4));
}
else
{
throw new OverflowException("This class does not support parsing integers with a byte size greater than int.MaxValue");
}
}
else
{
readSize = variableSize;
}
byte peek = PeekBuffer();
if (peek.Equals(0x00))
{
TakeBuffer();
readSize--;
}
byte[] variableBytes = TakeBuffer(readSize);
BigInteger variableValue = EncodingUtility.CalculateValue(variableBytes);
variableBytes = null;
return(variableValue);
}
