On https://tools.ietf.org/html/rfc8032#page-24 you can find test vectors that are also used by rfc8037 (JOSE).
However, there seems to be no information on how to create an EdDSA public key from such a vector. Apparently you must be an expert on the inner workings of EdDSA in order to use this API. I have though managed(...) but 1) it looks strange 2) it may be incorrect. Steps 1. Convert the hex-code to a byte[] array. 2. Reverse (!) all the bytes in the byte[] array. 3. publicKey = kf.generatePublic( new EdECPublicKeySpec(new NamedParameterSpec(alg), new EdECPoint(false, new BigInteger(1, theByteArray)))); Ideally, EdECPoint should have an constructor that does whatever it takes based on a byte[] array. It is equally fuzzy in the other direction. A "getByteArray()" on EdECPoint had been great. Thanx, Anders
