Moving EC Keys Into BouncyCastle about jsrsasign

[Ruffio]

@BlueMeanie has this 'issue' been resolved? It looks like it was a question about implementation and not a bug/issue. Please consider to close it. Thanks.

[Ruffio]

@kjur this question should be closed due to lack of response from originator

[kjur]

To share key between Java and jsrsasign, I would recommend to share them in PKCS#8 DER private and public key format.

For example "prv.p8p.der" is a PKCS#8 DER formatted binary plain EC private key file and
"pub.p8.der" is a PKCS#8 DER formatted binary EC public key file.

Then to load private key in Java:

byte[] prvKeyBytes = loadBytes("../prv.p8p.der");
KeyFactory kf = KeyFactory.getInstance("EC");
KeySpec keySpec = new PKCS8EncodedKeySpec(prvKeyBytes);
PrivateKey prvKey = kf.generatePrivate(keySpec);

To load public key in Java:

byte[] pubKeyBytes = loadBytes("../pub.p8.der");
KeyFactory kf = KeyFactory.getInstance("EC");
KeySpec keySpec = new X509EncodedKeySpec(certBytes);
PublicKey pubKey = kf.generatePublic(keySpec);

To load private key in JavaScript with jsrsasign:

rs = require("jsrsasign");
rsu = require("jsrsasign-util");
hPrv = rsu.readFileHexBin("prv.p8p.der");
prvkey = rs.KEYUTIL.getKey(hPrv, "pkcs8rv");

To load public key in JavaScript with jsrsasign:

rs = require("jsrsasign");
rsu = require("jsrsasign-util");
hPub = rsu.readFileHexBin("pub.p8.der");
pubkey = rs.KEYUTIL.getKey(hPub, "pkcs8pub");