1 files changed, 52 insertions, 0 deletions
diff --git a/id.server/src/at/gv/egovernment/moa/id/auth/builder/VPKBuilder.java b/id.server/src/at/gv/egovernment/moa/id/auth/builder/VPKBuilder.java
new file mode 100644
index 000000000..c18156a01
--- /dev/null
+++ b/id.server/src/at/gv/egovernment/moa/id/auth/builder/VPKBuilder.java
@@ -0,0 +1,52 @@
+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;
+
+/**
+ * Builder for the VPK, as defined in
+ * <code>&quot;Ableitung f&uml;r die verfahrensspezifische Personenkennzeichnung&quot;</code>
+ * version <code>1.0.1</code> from <code>&quot;reference.e-government.gv.at&quot;</code>.
+ *  
+ * @author Paul Ivancsics
+ * @version $Id$
+ */
+public class VPKBuilder {
+
+  /**
+   * Builds the VPK from given parameters. 
+   * @param identificationValue "ZMR-Zahl"
+   * @param dateOfBirth "Geburtsdatum"
+   * @param target "Verfahrensname"; will be transformed to lower case
+   * @return VPK in a BASE64 encoding
+   * @throws BuildException while building the VPK
+   */
+  public String buildVPK(String identificationValue, String dateOfBirth, String target) 
+    throws BuildException {
+    
+    if (identificationValue == null || identificationValue.length() == 0 
+      || dateOfBirth == null || dateOfBirth.length() == 0
+      || target == null || target.length() == 0)
+      throw new BuildException(
+        "builder.00", 
+        new Object[] {"VPK", 
+          "Unvollständige Parameterangaben: identificationValue=" + identificationValue + 
+          ",dateOfBirth=" + dateOfBirth + ",target=" + target});
+    String basisbegriff = identificationValue + "+" + dateOfBirth + "+" + target.toLowerCase();
+    try {
+      MessageDigest md = MessageDigest.getInstance("SHA-1");
+      byte[] hash = md.digest(basisbegriff.getBytes());
+      String hashBase64 = Base64Utils.encode(hash);
+      return hashBase64;
+    }
+    catch (Exception ex) {
+      throw new BuildException(
+        "builder.00", 
+        new Object[] {"VPK", ex.toString()}, 
+        ex);
+    }
+  }
+
+}