Is X25519 available as curve for KEX in Android?

Question

I know from SSLHandshakeException: Handshake failed on Android N/7.0 and my own experience that this curve is not available in the system crypto lib for Android up to 7.1.2 (though it is available in Android web browsers such as Chrom{e,ium} or Firefox and its derivative, as you can read in Android - SSL/TLS and ECC (Elliptic curve cryptography) for instance).

My question is whether it was added on Android 8.x or not, and in this latter case do you have any idea why it is not supported?

Answer 1

虽然我没有关于Android 8.0 Oreo的确切答案，但我可以肯定地说X25519经过测试后可用于Android 8.1中的KEX。