dedis / kyber / 1444

81%

master: 79%

Pull #353

travis-ci

Properly marshal/unmarshal zero G2 points

After commit 09d88ea559cff, a round-trip encode/decode
of a zero point was failing. TestG2Marshal would have
discovered this 1 time in 2^256 runs, but in order to speed
up testing, add a new TestG2MarshalZero which always fails.

The solution is to follow the previous code patch from where a zero point
was detected, i.e. run p.g.SetInfinity(). This is still compatible
with golang.org/x/crypto/bn256, which also marshals infinity
as all zeros. (Checked this via printf-debugging on it.)

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