public void testCompat() throws Exception {
if (Security.getProvider("SUN") == null) {
return;
}
Signature s = Signature.getInstance("DSA", "SUN");
KeyPairGenerator g = KeyPairGenerator.getInstance("DSA", "SUN");
byte[] data = {1, 2, 3, 4, 5, 6, 7, 8, 9, 0};
g.initialize(512, new SecureRandom());
KeyPair p = g.generateKeyPair();
PrivateKey sKey = p.getPrivate();
PublicKey vKey = p.getPublic();
//
// sign SUN - verify with BC
//
s.initSign(sKey);
s.update(data);
byte[] sigBytes = s.sign();
s = Signature.getInstance("DSA", "BC");
s.initVerify(vKey);
s.update(data);
if (!s.verify(sigBytes)) {
fail("SUN -> BC verification failed");
}
//
// sign BC - verify with SUN
//
s.initSign(sKey);
s.update(data);
sigBytes = s.sign();
s = Signature.getInstance("DSA", "SUN");
s.initVerify(vKey);
s.update(data);
if (!s.verify(sigBytes)) {
fail("BC -> SUN verification failed");
}
//
// key encoding test - BC decoding Sun keys
//
KeyFactory f = KeyFactory.getInstance("DSA", "BC");
X509EncodedKeySpec x509s = new X509EncodedKeySpec(vKey.getEncoded());
DSAPublicKey k1 = (DSAPublicKey) f.generatePublic(x509s);
checkPublic(k1, vKey);
PKCS8EncodedKeySpec pkcs8 = new PKCS8EncodedKeySpec(sKey.getEncoded());
DSAPrivateKey k2 = (DSAPrivateKey) f.generatePrivate(pkcs8);
checkPrivateKey(k2, sKey);
//
// key decoding test - SUN decoding BC keys
//
f = KeyFactory.getInstance("DSA", "SUN");
x509s = new X509EncodedKeySpec(k1.getEncoded());
vKey = (DSAPublicKey) f.generatePublic(x509s);
checkPublic(k1, vKey);
pkcs8 = new PKCS8EncodedKeySpec(k2.getEncoded());
sKey = f.generatePrivate(pkcs8);
checkPrivateKey(k2, sKey);
}
