8146293: Add support for RSASSA-PSS Signature algorithm

Add RSASSA-PSS key and signature support to SunRsaSign provider

Reviewed-by: wetmore

src/java.base/share/classes/sun/security/rsa/RSAPrivateKeyImpl.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2003, 2018, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -29,15 +29,18 @@ import java.io.IOException;
 import java.math.BigInteger;
 
 import java.security.*;
+import java.security.spec.AlgorithmParameterSpec;
 import java.security.interfaces.*;
 
 import sun.security.util.*;
+import sun.security.x509.AlgorithmId;
 import sun.security.pkcs.PKCS8Key;
 
 /**
- * Key implementation for RSA private keys, non-CRT form (modulus, private
- * exponent only). For CRT private keys, see RSAPrivateCrtKeyImpl. We need
- * separate classes to ensure correct behavior in instanceof checks, etc.
+ * RSA private key implementation for "RSA", "RSASSA-PSS" algorithms in non-CRT
+ * form (modulus, private exponent only). For CRT private keys, see
+ * RSAPrivateCrtKeyImpl. We need separate classes to ensure correct behavior
+ * in instanceof checks, etc.
  *
  * Note: RSA keys must be at least 512 bits long
  *
@@ -54,16 +57,25 @@ public final class RSAPrivateKeyImpl extends PKCS8Key implements RSAPrivateKey {
     private final BigInteger n;         // modulus
     private final BigInteger d;         // private exponent
 
+    // optional parameters associated with this RSA key
+    // specified in the encoding of its AlgorithmId.
+    // must be null for "RSA" keys.
+    private final AlgorithmParameterSpec keyParams;
+
     /**
      * Construct a key from its components. Used by the
      * RSAKeyFactory and the RSAKeyPairGenerator.
      */
-    RSAPrivateKeyImpl(BigInteger n, BigInteger d) throws InvalidKeyException {
+    RSAPrivateKeyImpl(AlgorithmId rsaId, BigInteger n, BigInteger d)
+            throws InvalidKeyException {
+        RSAKeyFactory.checkRSAProviderKeyLengths(n.bitLength(), null);
+
         this.n = n;
         this.d = d;
-        RSAKeyFactory.checkRSAProviderKeyLengths(n.bitLength(), null);
+        this.keyParams = RSAUtil.getParamSpec(rsaId);
+
         // generate the encoding
-        algid = RSAPrivateCrtKeyImpl.rsaId;
+        algid = rsaId;
         try {
             DerOutputStream out = new DerOutputStream();
             out.putInteger(0); // version must be 0
@@ -85,17 +97,34 @@ public final class RSAPrivateKeyImpl extends PKCS8Key implements RSAPrivateKey {
     }
 
     // see JCA doc
+    @Override
     public String getAlgorithm() {
-        return "RSA";
+        return algid.getName();
     }
 
     // see JCA doc
+    @Override
     public BigInteger getModulus() {
         return n;
     }
 
     // see JCA doc
+    @Override
     public BigInteger getPrivateExponent() {
         return d;
     }
+
+    // see JCA doc
+    @Override
+    public AlgorithmParameterSpec getParams() {
+        return keyParams;
+    }
+
+    // return a string representation of this key for debugging
+    @Override
+    public String toString() {
+        return "Sun " + getAlgorithm() + " private key, " + n.bitLength()
+               + " bits" + "\n  params: " + keyParams + "\n  modulus: " + n
+               + "\n  private exponent: " + d;
+    }
 }