From 8ab6c1a1d82f46d27e5019198c2a1b7926ac6e72 Mon Sep 17 00:00:00 2001
From: Christian Kollmann <christian.kollmann@a-sit.at>
Date: Mon, 22 Feb 2021 13:31:30 +0100
Subject: Add method to parse citizen country code from eIDAS personal
 identifier

---
 .../auth/eidas/v2/utils/EidasResponseUtils.java    | 25 +++++++++++++++++++---
 1 file changed, 22 insertions(+), 3 deletions(-)

(limited to 'eidas_modules/authmodule-eIDAS-v2/src/main/java/at/asitplus')

diff --git a/eidas_modules/authmodule-eIDAS-v2/src/main/java/at/asitplus/eidas/specific/modules/auth/eidas/v2/utils/EidasResponseUtils.java b/eidas_modules/authmodule-eIDAS-v2/src/main/java/at/asitplus/eidas/specific/modules/auth/eidas/v2/utils/EidasResponseUtils.java
index 1d47df20..010681a9 100644
--- a/eidas_modules/authmodule-eIDAS-v2/src/main/java/at/asitplus/eidas/specific/modules/auth/eidas/v2/utils/EidasResponseUtils.java
+++ b/eidas_modules/authmodule-eIDAS-v2/src/main/java/at/asitplus/eidas/specific/modules/auth/eidas/v2/utils/EidasResponseUtils.java
@@ -47,6 +47,8 @@ import java.util.List;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
+import static at.asitplus.eidas.specific.modules.auth.eidas.v2.Constants.eIDAS_ATTR_PERSONALIDENTIFIER;
+
 public class EidasResponseUtils {
   private static final Logger log = LoggerFactory.getLogger(EidasResponseUtils.class);
   public static final String PERSONALIDENIFIER_VALIDATION_PATTERN = "^[A-Z,a-z]{2}/[A-Z,a-z]{2}/.*";
@@ -72,13 +74,12 @@ public class EidasResponseUtils {
    * Unique Identifier
    *
    * @param uniqueID eIDAS attribute value of a unique identifier
-   * @return {@link Trible} that contains: <br>
+   * @return {@link Triple} that contains: <br>
    *         First : citizen country <br>
    *         Second: destination country <br>
    *         Third : unique identifier <br>
    *         or null if the attribute value has a wrong format
    */
-
   public static Triple<String, String, String> parseEidasPersonalIdentifier(String uniqueID) {
     if (!validateEidasPersonalIdentifier(uniqueID)) {
       log.error("eIDAS attribute value for {} looks wrong formated. Value: {}",
@@ -87,7 +88,6 @@ public class EidasResponseUtils {
 
     }
     return Triple.newInstance(uniqueID.substring(0, 2), uniqueID.substring(3, 5), uniqueID.substring(6));
-
   }
 
   /**
@@ -335,6 +335,25 @@ public class EidasResponseUtils {
     return eIdentifier.getThird();
   }
 
+  /**
+   * Post-Process the eIDAS pseudonym to citizen country code.
+   *
+   * @param personalIdObj eIDAS PersonalIdentifierAttribute
+   * @return Citizen Country Code
+   * @throws EidasAttributeException if NO attribute is available
+   */
+  public static String processCountryCode(Object personalIdObj) throws EidasAttributeException {
+    if (!(personalIdObj instanceof String)) {
+      throw new EidasAttributeException(Constants.eIDAS_ATTR_PERSONALIDENTIFIER);
+    }
+    final Triple<String, String, String> eIdentifier =
+        EidasResponseUtils.parseEidasPersonalIdentifier((String) personalIdObj);
+    if (eIdentifier == null || eIdentifier.getFirst() == null) {
+      throw new EidasAttributeException("Error processing eIdentifier");
+    }
+    return eIdentifier.getFirst();
+  }
+
   /**
    * Post-Process the eIDAS TaxReference attribute.
    *
-- 
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