public static RandContext init_det(RandGen rand_gen, byte[] seed)
{
RandContext rand_ctx = RandContext.Default();
IntPtr rand_ctx_ptr = Marshal.AllocHGlobal(Marshal.SizeOf(rand_ctx.rand_ctx));
Marshal.StructureToPtr(rand_ctx.rand_ctx, rand_ctx_ptr, false);
IntPtr rand_gen_ptr = Marshal.AllocHGlobal(Marshal.SizeOf(rand_gen));
Marshal.StructureToPtr(rand_gen, rand_gen_ptr, false);
IntPtr seed_ptr = Marshal.AllocHGlobal(seed.Length);
Marshal.Copy(seed, 0, seed_ptr, seed.Length);
IntPtr seed_len_ptr = new IntPtr(seed.Length);
var result = ffi.ntru_rand_init_det(rand_ctx_ptr, rand_gen_ptr, seed_ptr, seed_len_ptr);
if (result.ToInt32() != 0)
{
Console.WriteLine("Error: Failed to Initialize Deterministic RandomContext");
}
rand_ctx.rand_ctx = (ffi.CNtruRandContext)Marshal.PtrToStructure(rand_ctx_ptr, typeof(ffi.CNtruRandContext));
//Marshal.FreeHGlobal(rand_ctx_ptr);
//Marshal.FreeHGlobal(rand_gen_ptr);
Marshal.FreeHGlobal(seed_ptr);
return(rand_ctx);
}
public RandGen get_rng()
{
RandGen get_rng = rand.RNG_DEFAULT;
Marshal.PtrToStructure(rand_ctx.rand_gen, get_rng);
return(get_rng);
}
public static RandContext init(RandGen rand_gen)
{
RandContext rand_ctx = RandContext.Default();
IntPtr rand_ctx_ptr = Marshal.AllocHGlobal(Marshal.SizeOf(rand_ctx.rand_ctx));
Marshal.StructureToPtr(rand_ctx.rand_ctx, rand_ctx_ptr, false);
IntPtr rand_gen_ptr = Marshal.AllocHGlobal(Marshal.SizeOf(rand_gen));
Marshal.StructureToPtr(rand_gen, rand_gen_ptr, false);
var result = ffi.ntru_rand_init(rand_ctx_ptr, rand_gen_ptr);
if (result.ToInt32() != 0)
{
Console.WriteLine("Error: Failed to Initialize RandomContext");
}
rand_ctx.rand_ctx = (ffi.CNtruRandContext)Marshal.PtrToStructure(rand_ctx_ptr, typeof(ffi.CNtruRandContext));
return(rand_ctx);
}