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author | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
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committer | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
commit | 554fd8c5195424bdbcabf5de30fdc183aba391bd (patch) | |
tree | 976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/gnu/java/security/key/KeyPairGeneratorFactory.java | |
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Diffstat (limited to 'libjava/classpath/gnu/java/security/key/KeyPairGeneratorFactory.java')
-rw-r--r-- | libjava/classpath/gnu/java/security/key/KeyPairGeneratorFactory.java | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/libjava/classpath/gnu/java/security/key/KeyPairGeneratorFactory.java b/libjava/classpath/gnu/java/security/key/KeyPairGeneratorFactory.java new file mode 100644 index 000000000..151cace39 --- /dev/null +++ b/libjava/classpath/gnu/java/security/key/KeyPairGeneratorFactory.java @@ -0,0 +1,120 @@ +/* KeyPairGeneratorFactory.java -- + Copyright 2001, 2002, 2003, 2006 Free Software Foundation, Inc. + +This file is a part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2 of the License, or (at +your option) any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; if not, write to the Free Software +Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 +USA + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package gnu.java.security.key; + +import gnu.java.security.Registry; +import gnu.java.security.key.dss.DSSKeyPairGenerator; +import gnu.java.security.key.rsa.RSAKeyPairGenerator; + +import java.lang.reflect.Constructor; +import java.util.Collections; +import java.util.HashSet; +import java.util.Set; + +/** + * A Factory to instantiate asymmetric keypair generators. + */ +public class KeyPairGeneratorFactory +{ + /** Trivial constructor to enforce Singleton pattern. */ + private KeyPairGeneratorFactory() + { + super(); + } + + /** + * Returns an instance of a keypair generator given its name. + * + * @param name the case-insensitive key generator name. + * @return an instance of the keypair generator, or <code>null</code> if + * none found. + */ + public static IKeyPairGenerator getInstance(String name) + { + if (name == null) + return null; + + name = name.trim(); + IKeyPairGenerator result = null; + if (name.equalsIgnoreCase(Registry.DSA_KPG) + || name.equalsIgnoreCase(Registry.DSS_KPG)) + result = new DSSKeyPairGenerator(); + else if (name.equalsIgnoreCase(Registry.RSA_KPG)) + result = new RSAKeyPairGenerator(); + else if (name.equalsIgnoreCase(Registry.DH_KPG)) + result = makeInstance("gnu.javax.crypto.key.dh.GnuDHKeyPairGenerator"); + else if (name.equalsIgnoreCase(Registry.SRP_KPG)) + result = makeInstance("gnu.javax.crypto.key.srp6.SRPKeyPairGenerator"); + + return result; + } + + /** + * Returns a {@link Set} of keypair generator names supported by this + * <i>Factory</i>. Those keypair generators may be used in conjunction with + * the digital signature schemes with appendix supported by this library. + * + * @return a {@link Set} of keypair generator names (Strings). + */ + public static final Set getNames() + { + HashSet hs = new HashSet(); + hs.add(Registry.DSS_KPG); + hs.add(Registry.DSA_KPG); + hs.add(Registry.RSA_KPG); + hs.add(Registry.DH_KPG); + hs.add(Registry.SRP_KPG); + return Collections.unmodifiableSet(hs); + } + + private static IKeyPairGenerator makeInstance(String clazz) + { + try + { + Class c = Class.forName(clazz); + Constructor ctor = c.getConstructor(new Class[0]); + return (IKeyPairGenerator) ctor.newInstance(new Object[0]); + } + catch (Exception x) + { + throw new IllegalArgumentException( + "strong crypto key pair generator not available: " + clazz, x); + } + } +} |