1 files changed, 85 insertions, 0 deletions
diff --git a/smccSTAL/src/main/java/at/gv/egiz/bku/smccstal/DomainIdConverter.java b/smccSTAL/src/main/java/at/gv/egiz/bku/smccstal/DomainIdConverter.java
new file mode 100644
index 00000000..3a564b91
--- /dev/null
+++ b/smccSTAL/src/main/java/at/gv/egiz/bku/smccstal/DomainIdConverter.java
@@ -0,0 +1,85 @@
+/*
+* 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.smccstal;
+
+import iaik.me.asn1.ASN1;
+import iaik.me.utils.Base64;
+
+import java.io.IOException;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+import java.util.Vector;
+
+public class DomainIdConverter {
+
+  private static String getBaseId(ASN1 identityLink) throws IOException {
+
+    if (identityLink.getType() == ASN1.TYPE_SEQUENCE) {
+      ASN1 personData = identityLink.getElementAt(4);
+      if (personData.getType() == ASN1.TAG_CONTEXT_SPECIFIC) {
+        ASN1 physicalPersonData = personData.gvASN1();
+        ASN1 baseId = physicalPersonData.getElementAt(0);
+        return baseId.gvString();
+      }
+      throw new IOException("Invalid structure.");
+
+    }
+    throw new IOException("Invalid structure.");
+
+  }
+
+  private static ASN1 replaceBaseId(ASN1 identityLink, String newBaseId)
+      throws IOException {
+
+    ASN1 newIdentityLink = new ASN1(ASN1.TYPE_SEQUENCE, new Vector<ASN1>());
+    for (int i = 0; i < identityLink.getSize(); i++) {
+      ASN1 asn1 = identityLink.getElementAt(i);
+      if (i == 4 && asn1.getType() == ASN1.TAG_CONTEXT_SPECIFIC) {
+        ASN1 physicalPersonData = asn1.gvASN1();
+        ASN1 newPhysicalPersonData = new ASN1(ASN1.TYPE_SEQUENCE,
+            new Vector<ASN1>());
+        newPhysicalPersonData.addElement(new ASN1(ASN1.TYPE_UTF8_STRING,
+            newBaseId));
+        for (int j = 1; j < physicalPersonData.getSize(); j++) {
+          newPhysicalPersonData.addElement(physicalPersonData.getElementAt(j));
+        }
+        asn1 = new ASN1(ASN1.TAG_CONTEXT_SPECIFIC, newPhysicalPersonData);
+      }
+      newIdentityLink.addElement(asn1);
+    }
+    return newIdentityLink;
+
+  }
+
+  public static byte[] convertDomainId(byte[] data, String domainId)
+      throws IOException, NoSuchAlgorithmException {
+    if (domainId == null) {
+      return data;
+    }
+    ASN1 identityLink = new ASN1(data);
+    MessageDigest sha = null;
+    sha = MessageDigest.getInstance("SHA");
+    String base = getBaseId(identityLink);
+    sha.update((base + "+" + domainId).getBytes());
+    String bpkStr = new String(Base64.encode(sha.digest()));
+    bpkStr = bpkStr.trim();
+    identityLink = replaceBaseId(identityLink, bpkStr);
+    System.out.println(getBaseId(identityLink));
+    return identityLink.getEncoded();
+  }
+
+}