private void testKeyFactory() throws Exception {
KeyPairGenerator g = KeyPairGenerator.getInstance("ECDSA", "SC");
ECCurve curve =
new ECCurve.Fp(
new BigInteger(
"883423532389192164791648750360308885314476597252960362792450860609699839"), // q
new BigInteger("7fffffffffffffffffffffff7fffffffffff8000000000007ffffffffffc", 16), // a
new BigInteger(
"6b016c3bdcf18941d0d654921475ca71a9db2fb27d1d37796185c2942c0a", 16)); // b
ECParameterSpec ecSpec =
new ECParameterSpec(
curve,
curve.decodePoint(
Hex.decode("020ffa963cdca8816ccc33b8642bedf905c3d358573d3f27fbbd3b3cb9aaaf")), // G
new BigInteger(
"883423532389192164791648750360308884807550341691627752275345424702807307")); // n
ConfigurableProvider config = (ConfigurableProvider) Security.getProvider("SC");
config.setParameter(ConfigurableProvider.EC_IMPLICITLY_CA, ecSpec);
g.initialize(null, new SecureRandom());
KeyPair p = g.generateKeyPair();
ECPrivateKey sKey = (ECPrivateKey) p.getPrivate();
ECPublicKey vKey = (ECPublicKey) p.getPublic();
KeyFactory fact = KeyFactory.getInstance("ECDSA", "SC");
vKey = (ECPublicKey) fact.generatePublic(new ECPublicKeySpec(vKey.getQ(), null));
sKey = (ECPrivateKey) fact.generatePrivate(new ECPrivateKeySpec(sKey.getD(), null));
testECDSA(sKey, vKey);
testBCParamsAndQ(sKey, vKey);
testEC5Params(sKey, vKey);
testEncoding(sKey, vKey);
ECPublicKey vKey2 = (ECPublicKey) fact.generatePublic(new ECPublicKeySpec(vKey.getQ(), ecSpec));
ECPrivateKey sKey2 =
(ECPrivateKey) fact.generatePrivate(new ECPrivateKeySpec(sKey.getD(), ecSpec));
if (!vKey.equals(vKey2) || vKey.hashCode() != vKey2.hashCode()) {
fail("private equals/hashCode failed");
}
if (!sKey.equals(sKey2) || sKey.hashCode() != sKey2.hashCode()) {
fail("private equals/hashCode failed");
}
// check we can get specs.
fact.getKeySpec(vKey, java.security.spec.ECPublicKeySpec.class);
fact.getKeySpec(sKey, java.security.spec.ECPrivateKeySpec.class);
}
protected int engineGetKeySize(Key key) {
if (!(key instanceof IESKey)) {
throw new IllegalArgumentException("must be passed IE key");
}
IESKey ieKey = (IESKey) key;
if (ieKey.getPrivate() instanceof DHPrivateKey) {
DHPrivateKey k = (DHPrivateKey) ieKey.getPrivate();
return k.getX().bitLength();
} else if (ieKey.getPrivate() instanceof ECPrivateKey) {
ECPrivateKey k = (ECPrivateKey) ieKey.getPrivate();
return k.getD().bitLength();
}
throw new IllegalArgumentException("not an IE key!");
}
private void testEncoding(ECPrivateKey privKey, ECPublicKey pubKey) throws Exception {
KeyFactory kFact = KeyFactory.getInstance("ECDSA", "SC");
byte[] bytes = privKey.getEncoded();
PrivateKeyInfo sInfo = PrivateKeyInfo.getInstance(new ASN1InputStream(bytes).readObject());
if (!sInfo.getPrivateKeyAlgorithm().getParameters().equals(DERNull.INSTANCE)) {
fail("private key parameters wrong");
}
ECPrivateKey sKey = (ECPrivateKey) kFact.generatePrivate(new PKCS8EncodedKeySpec(bytes));
if (!sKey.equals(privKey)) {
fail("private equals failed");
}
if (sKey.hashCode() != privKey.hashCode()) {
fail("private hashCode failed");
}
bytes = pubKey.getEncoded();
SubjectPublicKeyInfo vInfo =
SubjectPublicKeyInfo.getInstance(new ASN1InputStream(bytes).readObject());
if (!vInfo.getAlgorithm().getParameters().equals(DERNull.INSTANCE)) {
fail("public key parameters wrong");
}
ECPublicKey vKey = (ECPublicKey) kFact.generatePublic(new X509EncodedKeySpec(bytes));
if (!vKey.equals(pubKey) || vKey.hashCode() != pubKey.hashCode()) {
fail("public equals/hashCode failed");
}
testBCParamsAndQ(sKey, vKey);
testEC5Params(sKey, vKey);
testECDSA(sKey, vKey);
}
private void testBCParamsAndQ(ECPrivateKey sKey, ECPublicKey vKey) {
if (sKey.getParameters() != null) {
fail("parameters exposed in private key");
}
if (vKey.getParameters() != null) {
fail("parameters exposed in public key");
}
if (vKey.getQ().getCurve() != null) {
fail("curve exposed in public point");
}
}