/// <summary>
/// Creates a <see cref="SecureBigNumber" /> instance from a valid <see cref="BigNumberHandle" />
/// to a secure OpenSSL <c>BIGNUM</c> structure. A copy of the pointed to <c>BIGNUM</c> structure
/// is made for the created instance.
/// </summary>
/// <param name="bigNumberHandle">
/// A handle to a raw OpenSSL <c>BIGNUM</c> structure with which to initialize the new <see cref="SecureBigNumber" />.
/// </param>
/// <returns>
/// A new <see cref="SecureBigNumber" /> instance with the same value as
/// referred to by <paramref name="bigNumberHandle"/>.
/// </returns>
internal static SecureBigNumber FromRawHandle(BigNumberHandle bigNumberHandle)
{
if (bigNumberHandle.IsInvalid)
{
throw new ArgumentException("The provided handle is invalid.", nameof(bigNumberHandle));
}
var bn = new SecureBigNumber();
BigNumberHandle.Copy(bn.Handle, bigNumberHandle);
return(bn);
}
/// <summary>
/// Creates a <see cref="BigNumber" /> instance from a valid <see cref="BigNumberHandle" />
/// to an OpenSSL <c>BIGNUM</c> structure. A copy of the pointed to <c>BIGNUM</c> structure
/// is made for the created instance.
/// </summary>
/// <param name="bigNumberHandle">
/// A handle to a raw OpenSSL <c>BIGNUM</c> structure with which to initialize the new <see cref="BigNumber" />.
/// </param>
/// <returns>
/// A new <see cref="BigNumber" /> instance with the same value as
/// referred to by <paramref name="bigNumberHandle"/>.
/// </returns>
internal static BigNumber FromRawHandle(BigNumberHandle bigNumberHandle)
{
if (bigNumberHandle.IsInvalid)
{
throw new ArgumentException("The provided handle is invalid.", nameof(bigNumberHandle));
}
if (BigNumberHandle.GetFlags(bigNumberHandle).HasFlag(BigNumberFlags.Secure))
{
throw new ArgumentException(
"The provided handle is that of a secure big number. Converting secure into regular big numbers is not supported.",
nameof(bigNumberHandle)
);
}
var bn = new BigNumber();
BigNumberHandle.Copy(bn.Handle, bigNumberHandle);
return(bn);
}
