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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/javax/crypto/sasl/srp/IALG.java | |
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Diffstat (limited to 'libjava/classpath/gnu/javax/crypto/sasl/srp/IALG.java')
-rw-r--r-- | libjava/classpath/gnu/javax/crypto/sasl/srp/IALG.java | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/libjava/classpath/gnu/javax/crypto/sasl/srp/IALG.java b/libjava/classpath/gnu/javax/crypto/sasl/srp/IALG.java new file mode 100644 index 000000000..d0c92ea68 --- /dev/null +++ b/libjava/classpath/gnu/javax/crypto/sasl/srp/IALG.java @@ -0,0 +1,128 @@ +/* IALG.java -- + Copyright (C) 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.javax.crypto.sasl.srp; + +import gnu.javax.crypto.mac.IMac; +import gnu.javax.crypto.mac.MacFactory; + +import java.security.InvalidKeyException; +import java.security.NoSuchAlgorithmException; +import java.util.HashMap; + +import javax.security.sasl.SaslException; + +/** + * A Factory class that returns IALG (Integrity Algorithm) instances that + * operate as described in the draft-burdis-cat-sasl-srp-04 and later. + */ +public final class IALG + implements Cloneable +{ + private IMac hmac; + + /** Private constructor to enforce instantiation through Factory method. */ + private IALG(final IMac hmac) + { + super(); + + this.hmac = hmac; + } + + /** + * Returns an instance of a SASL-SRP IALG implementation. + * + * @param algorithm the name of the HMAC algorithm. + * @return an instance of this object. + */ + static synchronized IALG getInstance(final String algorithm) + throws SaslException + { + final IMac hmac; + hmac = MacFactory.getInstance(algorithm); + if (hmac == null) + throw new SaslException("getInstance()", + new NoSuchAlgorithmException(algorithm)); + return new IALG(hmac); + } + + public Object clone() throws CloneNotSupportedException + { + return new IALG((IMac) hmac.clone()); + } + + public void init(final KDF kdf) throws SaslException + { + try + { + final byte[] sk = kdf.derive(hmac.macSize()); + final HashMap map = new HashMap(); + map.put(IMac.MAC_KEY_MATERIAL, sk); + hmac.init(map); + } + catch (InvalidKeyException x) + { + throw new SaslException("getInstance()", x); + } + } + + public void update(final byte[] data) + { + hmac.update(data, 0, data.length); + } + + public void update(final byte[] data, final int offset, final int length) + { + hmac.update(data, offset, length); + } + + public byte[] doFinal() + { + return hmac.digest(); + } + + /** + * Returns the length (in bytes) of this SASL SRP Integrity Algorithm. + * + * @return the length, in bytes, of this integrity protection algorithm. + */ + public int length() + { + return hmac.macSize(); + } +} |