bs = new ByteArrayInputStream(b);
i = new MemoryCacheImageInputStream(bs);
byte[] fullB = new byte[26];
i.seek(0);
i.readFully(fullB);
h.check(Arrays.equals(fullB,
new byte[]
{
(byte) 0x92, (byte) 0x80, (byte) 0x05, (byte) 0x77,
(byte) 0xac, (byte) 0xf2, (byte) 0x8b, (byte) 0xa7,