public static bool IsAtInfinity(ECGroupHandle group, ECPointHandle p)
{
Debug.Assert(!group.IsInvalid, $"Accessed an invalid ECGroupHandle! <{nameof(group)}>");
Debug.Assert(!p.IsInvalid, $"Accessed an invalid ECPointHandle! <{nameof(p)}>");
var result = EC_POINT_is_at_infinity(group, p);
return(result == 1);
}
public static void SetToInfinity(ECGroupHandle group, ECPointHandle p)
{
Debug.Assert(!group.IsInvalid, $"Accessed an invalid ECGroupHandle! <{nameof(group)}>");
Debug.Assert(!p.IsInvalid, $"Accessed an invalid ECPointHandle! <{nameof(p)}>");
if (EC_POINT_set_to_infinity(group, p) == 0)
{
throw new OpenSslNativeException();
}
}
public static void Copy(ECPointHandle to, ECPointHandle from)
{
Debug.Assert(!to.IsInvalid, $"Accessed an invalid ECPointHandle! <{nameof(to)}>");
Debug.Assert(!from.IsInvalid, $"Accessed an invalid ECPointHandle! <{nameof(from)}>");
if (EC_POINT_copy(to, from) == 0)
{
throw new OpenSslNativeException();
}
}
/// <summary>
/// Allocates a new OpenSSL <c>EC_POINT</c> structure and
/// returns a handle to it.
///
/// The returned handle is guaranteed to point to be valid,
/// i.e., point to a valid <c>EC_POINT</c> structure.
/// </summary>
/// <param name="group">Valid handle to a OpenSSL <c>EC_GROUP</c> structure.</param>
/// <returns>
/// A valid <see cref="ECPointHandle" /> pointing to a freshly allocated
/// <c>EC_POINT</c> structure associated with the <c>EC_GROUP</c> given by <paramref name="group"/>.
/// </returns>
public static ECPointHandle Create(ECGroupHandle group)
{
var point = new ECPointHandle(EC_POINT_new(group), ownsHandle: true);
if (point.IsInvalid)
{
throw new OpenSslNativeException();
}
return(point);
}
public static void InvertInPlace(ECGroupHandle group, ECPointHandle p, BigNumberContextHandle ctx)
{
Debug.Assert(!group.IsInvalid, $"Accessed an invalid ECGroupHandle! <{nameof(group)}>");
Debug.Assert(!p.IsInvalid, $"Accessed an invalid ECPointHandle! <{nameof(p)}>");
Debug.Assert(!ctx.IsInvalid, $"Accessed an invalid BigNumberContextHandle! <{nameof(ctx)}>");
if (EC_POINT_invert(group, p, ctx) == 0)
{
throw new OpenSslNativeException();
}
}
public static void Multiply(ECGroupHandle group, ECPointHandle result, BigNumberHandle n, ECPointHandle q, BigNumberHandle m, BigNumberContextHandle ctx)
{
Debug.Assert(!group.IsInvalid, $"Accessed an invalid ECGroupHandle! <{nameof(group)}>");
Debug.Assert(!result.IsInvalid, $"Accessed an invalid ECPointHandle! <{nameof(result)}>");
Debug.Assert(!ctx.IsInvalid, $"Accessed an invalid BigNumberContextHandle! <{nameof(ctx)}>");
if (EC_POINT_mul(group, result, n, q, m, ctx) == 0)
{
throw new OpenSslNativeException();
}
}
public static void FromByteBuffer(ECGroupHandle group, ECPointHandle p, byte[] buffer, BigNumberContextHandle ctx)
{
Debug.Assert(!group.IsInvalid, $"Accessed an invalid ECGroupHandle! <{nameof(group)}>");
Debug.Assert(!ctx.IsInvalid, $"Accessed an invalid BigNumberContextHandle! <{nameof(ctx)}>");
var result = EC_POINT_oct2point(group, p, buffer, buffer.Length, ctx);
if (result == 0)
{
throw new OpenSslNativeException();
}
}
public static void Add(ECGroupHandle group, ECPointHandle result, ECPointHandle a, ECPointHandle b, BigNumberContextHandle ctx)
{
Debug.Assert(!group.IsInvalid, $"Accessed an invalid ECGroupHandle! <{nameof(group)}>");
Debug.Assert(!result.IsInvalid, $"Accessed an invalid ECPointHandle! <{nameof(result)}>");
Debug.Assert(!a.IsInvalid, $"Accessed an invalid ECPointHandle! <{nameof(a)}>");
Debug.Assert(!b.IsInvalid, $"Accessed an invalid ECPointHandle! <{nameof(b)}>");
Debug.Assert(!ctx.IsInvalid, $"Accessed an invalid BigNumberContextHandle! <{nameof(ctx)}>");
if (EC_POINT_add(group, result, a, b, ctx) == 0)
{
throw new OpenSslNativeException();
}
}
public static void GetAffineCoordinates(ECGroupHandle group, ECPointHandle p, BigNumberHandle x, BigNumberHandle y, BigNumberContextHandle ctx)
{
Debug.Assert(!group.IsInvalid, $"Accessed an invalid ECGroupHandle! <{nameof(group)}>");
Debug.Assert(!p.IsInvalid, $"Accessed an invalid ECPointHandle! <{nameof(p)}>");
Debug.Assert(!x.IsInvalid, $"Accessed an invalid BigNumberHandle! <{nameof(x)}>");
Debug.Assert(!y.IsInvalid, $"Accessed an invalid BigNumberHandle! <{nameof(y)}>");
Debug.Assert(!ctx.IsInvalid, $"Accessed an invalid BigNumberContextHandle! <{nameof(ctx)}>");
if (EC_POINT_get_affine_coordinates(group, p, x, y, ctx) == 0)
{
throw new OpenSslNativeException();
}
}
public static bool IsOnCurve(ECGroupHandle group, ECPointHandle p, BigNumberContextHandle ctx)
{
Debug.Assert(!group.IsInvalid, $"Accessed an invalid ECGroupHandle! <{nameof(group)}>");
Debug.Assert(!p.IsInvalid, $"Accessed an invalid ECPointHandle! <{nameof(p)}>");
Debug.Assert(!ctx.IsInvalid, $"Accessed an invalid BigNumberContextHandle! <{nameof(ctx)}>");
var result = EC_POINT_is_on_curve(group, p, ctx);
if (result < 0)
{
throw new OpenSslNativeException();
}
return(result == 1);
}
public static bool Compare(ECGroupHandle group, ECPointHandle a, ECPointHandle b, BigNumberContextHandle ctx)
{
Debug.Assert(!group.IsInvalid, $"Accessed an invalid ECGroupHandle! <{nameof(group)}>");
Debug.Assert(!a.IsInvalid, $"Accessed an invalid ECPointHandle! <{nameof(a)}>");
Debug.Assert(!b.IsInvalid, $"Accessed an invalid ECPointHandle! <{nameof(b)}>");
Debug.Assert(!ctx.IsInvalid, $"Accessed an invalid BigNumberContextHandle! <{nameof(ctx)}>");
var result = EC_POINT_cmp(group, a, b, ctx);
if (result < 0)
{
throw new OpenSslNativeException();
}
return(result == 0);
}
public static int ToByteBuffer(ECGroupHandle group, ECPointHandle p, PointEncoding form, byte[]?buffer, BigNumberContextHandle ctx)
{
Debug.Assert(!group.IsInvalid, $"Accessed an invalid ECGroupHandle! <{nameof(group)}>");
Debug.Assert(!p.IsInvalid, $"Accessed an invalid ECPointHandle! <{nameof(p)}>");
Debug.Assert(!ctx.IsInvalid, $"Accessed an invalid BigNumberContextHandle! <{nameof(ctx)}>");
int bufferLen = 0;
if (buffer != null)
{
bufferLen = buffer.Length;
}
bufferLen = EC_POINT_point2oct(group, p, form, buffer, bufferLen, ctx);
if (bufferLen == 0)
{
throw new OpenSslNativeException();
}
return(bufferLen);
}
private extern static int EC_POINT_add(ECGroupHandle group, ECPointHandle r, ECPointHandle a, ECPointHandle b, BigNumberContextHandle ctx);
private extern static int EC_POINT_is_at_infinity(ECGroupHandle group, ECPointHandle p);
private extern static int EC_POINT_oct2point(ECGroupHandle group, ECPointHandle p, byte[] buffer, int bufferLen, BigNumberContextHandle ctx);
private extern static int EC_POINT_point2oct(ECGroupHandle group, ECPointHandle p, PointEncoding form, byte[]?buffer, int bufferLen, BigNumberContextHandle contextHandle);
private extern static int EC_POINT_invert(ECGroupHandle group, ECPointHandle a, BigNumberContextHandle ctx);
private extern static int EC_POINT_is_on_curve(ECGroupHandle group, ECPointHandle point, BigNumberContextHandle ctx);
private extern static int EC_POINT_set_to_infinity(ECGroupHandle group, ECPointHandle point);
private extern static int EC_POINT_mul(ECGroupHandle group, ECPointHandle r, BigNumberHandle n, ECPointHandle q, BigNumberHandle m, BigNumberContextHandle ctx);
private extern static int EC_POINT_get_affine_coordinates(ECGroupHandle group, ECPointHandle p, BigNumberHandle x, BigNumberHandle y, BigNumberContextHandle ctx);
private extern static int EC_POINT_copy(ECPointHandle dst, ECPointHandle src);