public static byte[] encrypt(byte[] msg, PublicKey pub, EncParams param, RandContext rand_ctx)
{
byte[] enc = new byte[param.enc_len()];
IntPtr enc_ptr = Marshal.AllocHGlobal(param.enc_len());
IntPtr msg_ptr = Marshal.AllocHGlobal(msg.Length);
Marshal.Copy(msg, 0, msg_ptr, msg.Length);
IntPtr pub_ptr = Marshal.AllocHGlobal(Marshal.SizeOf(pub));
Marshal.StructureToPtr(pub, pub_ptr, false);
IntPtr param_ptr = Marshal.AllocHGlobal(Marshal.SizeOf(param));
Marshal.StructureToPtr(param, param_ptr, false);
IntPtr rand_ctx_ptr = Marshal.AllocHGlobal(Marshal.SizeOf(rand_ctx.rand_ctx));
Marshal.StructureToPtr(rand_ctx.rand_ctx, rand_ctx_ptr, false);
IntPtr msg_len_ptr = new IntPtr(msg.Length);
var result = ffi.ntru_encrypt(msg_ptr, msg_len_ptr, pub_ptr, param_ptr, rand_ctx_ptr, enc_ptr);
if (result != 0)
{
Console.WriteLine("Error: Failed to Encrypt Message");
}
Console.WriteLine("Went through FFI Encrypt Function");
Marshal.Copy(enc_ptr, enc, 0, enc.Length);
Marshal.FreeHGlobal(msg_ptr);
Marshal.FreeHGlobal(pub_ptr);
Marshal.FreeHGlobal(param_ptr);
Marshal.FreeHGlobal(rand_ctx_ptr);
Marshal.FreeHGlobal(enc_ptr);
return(enc);
}
public byte[] to_arr_sse_2048(EncParams param)
{
IntPtr this_ptr = Marshal.AllocHGlobal(Marshal.SizeOf(this));
Marshal.StructureToPtr(this, this_ptr, false);
byte[] a = new byte[param.enc_len()];
IntPtr a_byte = Marshal.AllocHGlobal(param.enc_len());
ffi.ntru_to_arr_sse_2048(this_ptr, a_byte);
Marshal.Copy(a_byte, a, 0, param.enc_len());
Marshal.FreeHGlobal(this_ptr);
Marshal.FreeHGlobal(a_byte);
return(a);
}