PR64881: KeyPairGenerator.genKeyPair() ends up calling the default generateKeyPair method which returns a DSA generator

2015-01-30  Andrew John Hughes  <gnu_andrew@member.fsf.org>

	PR classpath/64881
	* NEWS: Updated.
	* java/security/KeyPairGenerator.java:
	(genKeyPair()): Document properly. Call original
	method, generateKeyPair().
	(generateKeyPair()): Document properly. Use provider
	and algorithm values if set rather than just defaulting
	to GNU and DSA.

Signed-off-by: Andrew John Hughes <gnu_andrew@member.fsf.org>

1 files changed, 47 insertions, 18 deletions

diff --git a/java/security/KeyPairGenerator.java b/java/security/KeyPairGenerator.java
index 19724da6f..457c5a531 100644
--- a/java/security/KeyPairGenerator.java
+++ b/java/security/KeyPairGenerator.java
@@ -1,5 +1,5 @@
 /* KeyPairGenerator.java --- Key Pair Generator Class
-   Copyright (C) 1999, 2002, 2003, 2004, 2005, 2014  Free Software Foundation, Inc.
+   Copyright (C) 1999, 2002, 2003, 2004, 2005, 2014, 2015  Free Software Foundation, Inc.
 
 This file is part of GNU Classpath.
 
@@ -278,9 +278,17 @@ public abstract class KeyPairGenerator extends KeyPairGeneratorSpi
   }
 
   /**
-   * Generates a new "DSA" {@link KeyPair} from the "GNU" security provider.
-   *
-   * <p>This method generates a unique key-pair each time it is called.</p>
+   * <p>
+   * Generates a new key pair. If a provider hasn't been selected,
+   * it defaults to generating a "DSA" {@link KeyPair} using the "GNU"
+   * security provider. If the provider hasn't been initialised, then
+   * the provider-specified default key size and other parameters are
+   * used.
+   * </p>
+   * <p>
+   * A new key pair is generated on each call to this method. It
+   * is functionally equivalent to {@link #genKeyPair()}.
+   * </p>
    *
    * @return a new unique {@link KeyPair}.
    * @see #generateKeyPair()
@@ -288,28 +296,49 @@ public abstract class KeyPairGenerator extends KeyPairGeneratorSpi
    */
   public final KeyPair genKeyPair()
   {
-    try
-      {
-        return getInstance("DSA", "GNU").generateKeyPair();
-      }
-    catch (Exception e)
-      {
-        System.err.println("genKeyPair failed: " + e);
-        e.printStackTrace();
-        return null;
-      }
+    return generateKeyPair();
   }
 
   /**
-   * Generates a new "DSA" {@link KeyPair} from the "GNU" security provider.
-   *
-   * <p>This method generates a unique key pair each time it is called.</p>
+   * <p>
+   * Generates a new key pair. If a provider hasn't been selected,
+   * it defaults to generating a "DSA" {@link KeyPair} using the "GNU"
+   * security provider. If the provider hasn't been initialised, then
+   * the provider-specified default key size and other parameters are
+   * used.
+   * </p>
+   * <p>
+   * A new key pair is generated on each call to this method. It
+   * is functionally equivalent to {@link #generateKeyPair()}.
+   * </p>
    *
    * @return a new unique {@link KeyPair}.
    * @see #genKeyPair()
    */
   public KeyPair generateKeyPair()
   {
-    return genKeyPair();
+    try
+      {
+	Provider providerToUse = null;
+	String algToUse = null;
+
+	if (provider == null)
+	  providerToUse = Security.getProvider("GNU");
+	else
+	  providerToUse = provider;
+
+	if (algorithm == null)
+	  algToUse = "DSA";
+	else
+	  algToUse = algorithm;
+
+        return getInstance(algToUse, providerToUse).generateKeyPair();
+      }
+    catch (Exception e)
+      {
+        System.err.println("genKeyPair failed: " + e);
+        e.printStackTrace();
+        return null;
+      }
   }
 }