public static unsafe bool Ecdh(byte[] agreement, byte[] publicKey, byte[] privateKey)
{
int outputLength = agreement.Length;
secp256k1_ecdh_hash_function hashFunctionPtr = (void *output, void *x, void *y, IntPtr d) =>
{
var outputSpan = new Span <byte>(output, outputLength);
var xSpan = new Span <byte>(x, 32);
if (xSpan.Length < 32)
{
return(0);
}
xSpan.CopyTo(outputSpan);
return(1);
};
GCHandle gch = GCHandle.Alloc(hashFunctionPtr);
try
{
IntPtr fp = Marshal.GetFunctionPointerForDelegate(hashFunctionPtr);
{
return(Platform == OsPlatform.Windows
? Win64Lib.secp256k1_ecdh(Context, agreement, publicKey, privateKey, fp, IntPtr.Zero)
: Platform == OsPlatform.Linux
? PosixLib.secp256k1_ecdh(Context, agreement, publicKey, privateKey, fp, IntPtr.Zero)
: MacLib.secp256k1_ecdh(Context, agreement, publicKey, privateKey, fp, IntPtr.Zero));
}
}
finally
{
gch.Free();
}
}
