public static ulong[] GetH(ICryptoTransform key)
{
var bytes = new byte[16];
key.TransformBlock(bytes, 0, 16, bytes, 0);
int offset = 0;
var h1 = Utils.ReadUInt64(bytes, ref offset);
var h2 = Utils.ReadUInt64(bytes, ref offset);
Utils.ClearArray(bytes);
return(Construct(h1, h2));
}
public static bool GCMAD(ICryptoTransform key, byte[] iv, byte[] data, int offset, int len, ulong seqNum, byte contentType, ulong[] h, byte[] temp512)
{
int tOffset = offset + len;
ulong s1 = Utils.ReadUInt64(data, ref tOffset);
ulong s2 = Utils.ReadUInt64(data, ref tOffset);
CalcHash(key, iv, data, offset, len, seqNum, GetHeader(contentType, len), h, temp512);
tOffset = offset + len;
ulong s1p = Utils.ReadUInt64(data, ref tOffset);
ulong s2p = Utils.ReadUInt64(data, ref tOffset);
if (s1 != s1p || s2 != s2p)
{
return(false);
}
Encrypt(data, offset, len, key, iv, 2, temp512);
return(true);
}