RFR: 8297972: Poly1305 Endianness on ByteBuffer not enforced

[Kevin Driver]

On Thu, 1 Dec 2022 18:28:21 GMT, Volodymyr Paprotski <duke at openjdk.org> wrote:

> Per rfc7539 Section 2.5, "Read the block as a little-endian number."
> 
> sun.security.util.math.intpoly.IntegerPolynomial1305 enforces this on input when input is provided as `[]byte` but not when input is in `ByteBuffer`
> 
> Tested with `Poly1305IntrinsicFuzzTest.java` from https://github.com/openjdk/jdk/pull/11338 which compares Poly1305 MAC between `ByteBuffer` and `[]byte`

✅

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PR: https://git.openjdk.org/jdk/pull/11463