1 files changed, 80 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..5523992a
--- /dev/null
+++ b/bkucommon/src/main/java/at/gv/egiz/bku/binding/IdImpl.java
@@ -0,0 +1,80 @@
+/*
+* 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;
+  }
+
+  public String toString() {
+    return idString;
+  }
+  
+  public int hashCode() {
+    return idString.hashCode();
+  }
+  
+  public boolean equals(Object other) {
+    if (other instanceof Id) {
+      Id otherId = (Id)other;
+      return otherId.toString().equals(idString);
+    } else {
+      return false;
+    }
+  }
+}
+\ No newline at end of file