1 files changed, 60 insertions, 0 deletions
diff --git a/id/server/idserverlib/src/main/java/at/gv/egovernment/moa/id/auth/builder/SAMLArtifactBuilder.java b/id/server/idserverlib/src/main/java/at/gv/egovernment/moa/id/auth/builder/SAMLArtifactBuilder.java
new file mode 100644
index 000000000..27e19e830
--- /dev/null
+++ b/id/server/idserverlib/src/main/java/at/gv/egovernment/moa/id/auth/builder/SAMLArtifactBuilder.java
@@ -0,0 +1,60 @@
+package at.gv.egovernment.moa.id.auth.builder;
+
+import java.io.ByteArrayOutputStream;
+import java.security.MessageDigest;
+
+import at.gv.egovernment.moa.id.BuildException;
+import at.gv.egovernment.moa.util.Base64Utils;
+
+/**
+ * Builder for the SAML artifact, as defined in the 
+ * Browser/Artifact profile of SAML.
+ * 
+ * @author Paul Ivancsics
+ * @version $Id$
+ */
+public class SAMLArtifactBuilder {
+
+  /**
+   * Constructor for SAMLArtifactBuilder.
+   */
+  public SAMLArtifactBuilder() {
+    super();
+  }
+  
+  /**
+   * Builds the SAML artifact, encoded BASE64.
+   * <ul>
+   * <li><code>TypeCode</code>: <code>0x0001</code>.</li>
+   * <li><code>SourceID</code>: SHA-1 hash of the authURL</li>
+   * <li><code>AssertionHandle</code>: SHA-1 hash of the <code>MOASessionID</code></li>
+   * </ul>
+   * @param authURL URL auf the MOA-ID Auth component to be used for construction 
+   *                 of <code>SourceID</code>
+   * @param sessionID <code>MOASessionID</code> to be used for construction 
+   *                   of <code>AssertionHandle</code>
+   * @return the 42-byte SAML artifact, encoded BASE64
+   */
+  public String build(String authURL, String sessionID) throws BuildException {
+		try {
+			MessageDigest md = MessageDigest.getInstance("SHA-1");
+	  	byte[] sourceID = md.digest(authURL.getBytes());
+	  	byte[] assertionHandle = md.digest(sessionID.getBytes());
+			ByteArrayOutputStream out = new ByteArrayOutputStream(42);
+			out.write(0);
+			out.write(1);
+			out.write(sourceID, 0, 20);
+			out.write(assertionHandle, 0, 20);
+			byte[] samlArtifact = out.toByteArray();
+  		String samlArtifactBase64 = Base64Utils.encode(samlArtifact);
+			return samlArtifactBase64;
+  	}
+		catch (Throwable ex) {
+			throw new BuildException(
+				"builder.00", 
+				new Object[] {"SAML Artifact, MOASessionID=" + sessionID, ex.toString()}, 
+				ex);
+		}
+  }
+
+}