1 files changed, 49 insertions, 0 deletions
diff --git a/id/server/idserverlib/src/main/java/at/gv/egovernment/moa/id/auth/builder/BPKBuilder.java b/id/server/idserverlib/src/main/java/at/gv/egovernment/moa/id/auth/builder/BPKBuilder.java
new file mode 100644
index 000000000..6cc8c1be8
--- /dev/null
+++ b/id/server/idserverlib/src/main/java/at/gv/egovernment/moa/id/auth/builder/BPKBuilder.java
@@ -0,0 +1,49 @@
+package at.gv.egovernment.moa.id.auth.builder;
+
+import java.security.MessageDigest;
+
+import at.gv.egovernment.moa.id.BuildException;
+import at.gv.egovernment.moa.util.Base64Utils;
+import at.gv.egovernment.moa.util.Constants;
+
+/**
+ * Builder for the bPK, as defined in
+ * <code>&quot;Ableitung f&uml;r die bereichsspezifische Personenkennzeichnung&quot;</code>
+ * version <code>1.0.1</code> from <code>&quot;reference.e-government.gv.at&quot;</code>.
+ *  
+ * @author Paul Schamberger
+ * @version $Id$
+ */
+public class BPKBuilder {
+
+  /**
+   * Builds the bPK from the given parameters. 
+   * @param identificationValue Base64 encoded "Stammzahl" 
+   * @param target "Bereich lt. Verordnung des BKA"
+   * @return bPK in a BASE64 encoding
+   * @throws BuildException if an error occurs on building the bPK
+   */
+  public String buildBPK(String identificationValue, String target) 
+    throws BuildException {
+    
+    if ((identificationValue == null || 
+         identificationValue.length() == 0 ||
+    		 target == null || 
+         target.length() == 0)) 
+    {
+      throw new BuildException("builder.00", 
+      		                     new Object[] {"BPK", "Unvollständige Parameterangaben: identificationValue=" + 
+                                             identificationValue + ",target=" + target});
+    }
+    String basisbegriff = identificationValue + "+" + Constants.URN_PREFIX_CDID + "+" + target;
+    try {
+      MessageDigest md = MessageDigest.getInstance("SHA-1");
+      byte[] hash = md.digest(basisbegriff.getBytes("ISO-8859-1"));
+      String hashBase64 = Base64Utils.encode(hash);
+      return hashBase64;
+    } catch (Exception ex) {
+      throw new BuildException("builder.00", new Object[] {"BPK", ex.toString()}, ex);
+    }
+  }
+
+}