BouncyCastle had an implementation for X25519 and X448 for some time.
But the JCA interface has been added only recently in version 1.61.
There is an overflow bug in this version that will be fixed
upstream in verion 1.63.
The tests ignore some minor bugs (Runtime exceptions instead of
checked exceptions) so that the test against BouncyCastle can be
added as a presubmit test.
Changing the ASN encoding of XDH keys.
Previously they used the jdk encoding.
This encoding was wrong.
NOKEYCHECK=True
PiperOrigin-RevId: 264348566
GitOrigin-RevId: 6564f188a3ed50f73c48cb8c41833d8c3798ab78
bleichen
06b80c9dcd