RFR 8213400: Support choosing curve name in keytool keypair generation

[Weijun Wang]

Please also review the code change at

   https://cr.openjdk.java.net/~weijun/8213400/webrev.00/

Notes:

- CertAndKeyGen.java:

generate(String name):

+            try {
+                keyGen.initialize(new NamedParameterSpec(name), prng);
+            } catch (InvalidAlgorithmParameterException e) {
+                if (keyType.equalsIgnoreCase("EC")) {
+                    // EC has another NamedParameterSpec
+                    keyGen.initialize(new ECGenParameterSpec(name), prng);
+                } else {
+                    throw e;
+                }
+            }

This is for future algorithms that accept -groupname. In fact, our own ECKeyPairGenerator should have accepted NamedParameterSpec too.

generate (int keyBits) allows keyBits == -1. This is for future algorithms that do not have a default -keysize.

- keytool/Main.java:

+    private String ecGroupNameForSize(int size) throws Exception {
+        AlgorithmParameters ap = AlgorithmParameters.getInstance("EC");
+        ap.init(new ECKeySizeParameterSpec(size));
+        // The following line assumes the toString value is "name (oid)"
+        return ap.toString().split(" ")[0];
+    }

Hopefully the ap.toString().split(" ")[0] return value is not too ugly, but the toString() might contain alternative names.

- CurveDB.java:

-        add("sect163r2 [NIST B-163]", "1.3.132.0.15", BD,
+        add("sect163r2 [NIST B-163]", "1.3.132.0.15", B,

All other NIST B-*** curves do not have BD. This should have been a typo.

- NamedCurve.java:

A new field commonNames added, which is used by the new GroupName.java test.

Thanks
Max