/// <summary>
/// Generates a prime number
/// </summary>
/// <param name="bits">Number of bits the resulting prime should have</param>
/// <returns>Generated prime</returns>
public static BigNumber GeneratePrime(int bits)
{
IntPtr res = OpenSSL.BN_new();
OpenSSL.BN_generate_prime(res, bits, Convert.ToInt32(true), IntPtr.Zero, IntPtr.Zero, null, IntPtr.Zero);
return(new BigNumber(res));
}
public BigNumber(string data, string format)
{
fBigNum = OpenSSL.BN_new();
if (format.ToLower() == "d")
{
OpenSSL.BN_dec2bn(ref fBigNum, Encoding.ASCII.GetBytes(data));
}
else if (format.ToLower() == "x")
{
OpenSSL.BN_hex2bn(ref fBigNum, Encoding.ASCII.GetBytes(data));
}
else
{
throw new FormatException();
}
}
public static BigNumber operator -(BigNumber left, BigNumber right)
{
//Ensure that the BigNums have not been disposed
if (left.fDisposed)
{
throw new ObjectDisposedException("left");
}
if (right.fDisposed)
{
throw new ObjectDisposedException("right");
}
//Actually do the operation
IntPtr r = OpenSSL.BN_new();
OpenSSL.BN_sub(r, left.fBigNum, right.fBigNum);
return(new BigNumber(r));
}
public static BigNumber operator /(BigNumber left, BigNumber right)
{
//Ensure that the BigNums have not been disposed
if (left.fDisposed)
{
throw new ObjectDisposedException("left");
}
if (right.fDisposed)
{
throw new ObjectDisposedException("right");
}
//Actually do the operation
IntPtr res = OpenSSL.BN_new();
IntPtr ctx = OpenSSL.BN_CTX_new();
OpenSSL.BN_div(res, IntPtr.Zero, left.fBigNum, right.fBigNum, ctx);
OpenSSL.BN_CTX_free(ctx);
return(new BigNumber(res));
}
/// <summary>
/// Raises this BigNum to a power and takes the modulus
/// </summary>
/// <param name="exp">The exponent</param>
/// <param name="mod">Value to use when taking the modulus</param>
/// <returns>this**exp % mod</returns>
public BigNumber PowMod(BigNumber exp, BigNumber mod)
{
if (fDisposed)
{
throw new ObjectDisposedException("this");
}
if (exp.fDisposed)
{
throw new ObjectDisposedException("exp");
}
if (mod.fDisposed)
{
throw new ObjectDisposedException("mod");
}
IntPtr r = OpenSSL.BN_new();
IntPtr ctx = OpenSSL.BN_CTX_new();
OpenSSL.BN_mod_exp(r, fBigNum, exp.fBigNum, mod.fBigNum, ctx);
OpenSSL.BN_CTX_free(ctx);
return(new BigNumber(r));
}
/// <summary>
/// Creates a new BigNum instance from a decimal string
/// </summary>
/// <param name="data">Number in decimal</param>
public BigNumber(string data)
{
fBigNum = OpenSSL.BN_new();
OpenSSL.BN_dec2bn(ref fBigNum, Encoding.ASCII.GetBytes(data));
}
public BigNumber(int data)
{
fBigNum = OpenSSL.BN_new();
OpenSSL.BN_dec2bn(ref fBigNum, Encoding.ASCII.GetBytes(Convert.ToString(data)));
}
public BigNumber()
{
fBigNum = OpenSSL.BN_new();
}
