diff options
Diffstat (limited to 'bkucommon/src/main/java/at/gv/egiz/bku/binding/IdImpl.java')
-rw-r--r-- | bkucommon/src/main/java/at/gv/egiz/bku/binding/IdImpl.java | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/bkucommon/src/main/java/at/gv/egiz/bku/binding/IdImpl.java b/bkucommon/src/main/java/at/gv/egiz/bku/binding/IdImpl.java new file mode 100644 index 00000000..c8a76823 --- /dev/null +++ b/bkucommon/src/main/java/at/gv/egiz/bku/binding/IdImpl.java @@ -0,0 +1,83 @@ +/* +* Copyright 2008 Federal Chancellery Austria and +* Graz University of Technology +* +* Licensed under the Apache License, Version 2.0 (the "License"); +* you may not use this file except in compliance with the License. +* You may obtain a copy of the License at +* +* http://www.apache.org/licenses/LICENSE-2.0 +* +* Unless required by applicable law or agreed to in writing, software +* distributed under the License is distributed on an "AS IS" BASIS, +* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +* See the License for the specific language governing permissions and +* limitations under the License. +*/ +package at.gv.egiz.bku.binding; + +import iaik.utils.Base64OutputStream; + +import java.io.ByteArrayOutputStream; +import java.io.IOException; +import java.security.SecureRandom; + +import org.apache.commons.logging.Log; +import org.apache.commons.logging.LogFactory; + +/** + * Implementation that uses a Base64 representation for self generated Ids. + * @author wbauer + * + */ +public class IdImpl implements at.gv.egiz.bku.binding.Id { + private static Log log = LogFactory.getLog(IdImpl.class); + + private String idString; + + public IdImpl(int bitNumber, SecureRandom random) { + int byteSize = bitNumber/8; + if (bitNumber % 8 != 0) { + byteSize++; + } + byte[] randomBytes = new byte[byteSize]; + random.nextBytes(randomBytes); + ByteArrayOutputStream baos = new ByteArrayOutputStream(); + Base64OutputStream b64 = new Base64OutputStream(baos); + try { + b64.write(randomBytes); + b64.flush(); + b64.close(); + idString = new String(baos.toByteArray()); + } catch (IOException e) { + log.error("Cannot create secure id: "+e); + } + } + + public IdImpl(String idString) { + if (idString == null) { + throw new NullPointerException("Provided idstring must not be null"); + } + this.idString = idString; + } + + @Override + public String toString() { + return idString; + } + + @Override + public int hashCode() { + return idString.hashCode(); + } + + @Override + public boolean equals(Object other) { + if (other instanceof Id) { + Id otherId = (Id)other; + return otherId.toString().equals(idString); + } else { + return false; + } + } +}
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