Codec
namespace Org.BouncyCastle.Math.EC.Rfc8032
{
internal static class Codec
{
internal static uint Decode16(byte[] bs, int off)
{
return (uint)(bs[off] | (bs[++off] << 8));
}
internal static uint Decode24(byte[] bs, int off)
{
return (uint)(bs[off] | (bs[++off] << 8) | (bs[++off] << 16));
}
internal static uint Decode32(byte[] bs, int off)
{
return (uint)(bs[off] | (bs[++off] << 8) | (bs[++off] << 16) | (bs[++off] << 24));
}
internal static void Decode32(byte[] bs, int bsOff, uint[] n, int nOff, int nLen)
{
for (int i = 0; i < nLen; i++) {
n[nOff + i] = Decode32(bs, bsOff + i * 4);
}
}
internal static void Encode24(uint n, byte[] bs, int off)
{
bs[off] = (byte)n;
bs[++off] = (byte)(n >> 8);
bs[++off] = (byte)(n >> 16);
}
internal static void Encode32(uint n, byte[] bs, int off)
{
bs[off] = (byte)n;
bs[++off] = (byte)(n >> 8);
bs[++off] = (byte)(n >> 16);
bs[++off] = (byte)(n >> 24);
}
internal static void Encode32(uint[] n, int nOff, int nLen, byte[] bs, int bsOff)
{
for (int i = 0; i < nLen; i++) {
Encode32(n[nOff + i], bs, bsOff + i * 4);
}
}
internal static void Encode56(ulong n, byte[] bs, int off)
{
Encode32((uint)n, bs, off);
Encode24((uint)(n >> 32), bs, off + 4);
}
}
}