validated Bytes From
Given an array of bytes, check that the last four bytes, when treated as a Big Endian unsigned int, agree with the CRC32 checksum of the bytes excluding the last four. Fail if they disagree. Answer a ByteArrayInputStream on the bytes excluding the last four.
Return
A ByteArrayInputStream on the non-CRC portion of the bytes.
Parameters
bytes
An array of bytes.
Throws
If the CRC check fails.