usnat backwards compatibility for compressed padding (#82)

Co-authored-by: Chad Huff <chad@totalium.com>

Author: chuff

iabgpp-encoder/src/main/java/com/iab/gpp/encoder/segment/UsNatCoreSegment.java

@@ -99,7 +99,11 @@ protected void decodeSegment(String encodedString, EncodableBitStringFields fiel
       // Necessary to maintain backwards compatibility when sensitive data processing changed from a
       // length of 12 to 16 and known child sensitive data consents changed from a length of 2 to 3 in the
       // DE, IA, NE, NH, NJ, TN release
-      if (bitString.length() == 66) {
+      if (bitString.length() == 60) {
+        bitString =
+            bitString.substring(0, 48) + "00000000" + bitString.substring(48, 52) + "00" + bitString.substring(52, 60) + "00";
+      }
+      else if (bitString.length() == 66) {
         bitString =
             bitString.substring(0, 48) + "00000000" + bitString.substring(48, 52) + "00" + bitString.substring(52, 62);
       }

iabgpp-encoder/src/test/java/com/iab/gpp/encoder/section/UsNatTest.java

@@ -228,6 +228,28 @@ public void testDecodeWithGpcSegmentExcluded() throws DecodingException {
     Assertions.assertEquals(2, usNat.getMspaServiceProviderMode());
     Assertions.assertEquals(false, usNat.getGpcSegmentIncluded());
   }
+
+  @Test
+  public void testDecodeBackwardsCompatibility() throws DecodingException {
+    UsNat usNat = new UsNat("BVQqAAAACg");
+
+    Assertions.assertEquals(1, usNat.getSharingNotice());
+    Assertions.assertEquals(1, usNat.getSaleOptOutNotice());
+    Assertions.assertEquals(1, usNat.getSharingOptOutNotice());
+    Assertions.assertEquals(1, usNat.getTargetedAdvertisingOptOutNotice());
+    Assertions.assertEquals(0, usNat.getSensitiveDataProcessingOptOutNotice());
+    Assertions.assertEquals(0, usNat.getSensitiveDataLimitUseNotice());
+    Assertions.assertEquals(2, usNat.getSaleOptOut());
+    Assertions.assertEquals(2, usNat.getSharingOptOut());
+    Assertions.assertEquals(2, usNat.getTargetedAdvertisingOptOut());
+    Assertions.assertEquals(Arrays.asList(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0), usNat.getSensitiveDataProcessing());
+    Assertions.assertEquals(Arrays.asList(0, 0, 0), usNat.getKnownChildSensitiveDataConsents());
+    Assertions.assertEquals(2, usNat.getPersonalDataConsents());
+    Assertions.assertEquals(2, usNat.getMspaCoveredTransaction());
+    Assertions.assertEquals(0, usNat.getMspaOptOutOptionMode());
+    Assertions.assertEquals(0, usNat.getMspaServiceProviderMode());
+    Assertions.assertEquals(false, usNat.getGpc());
+  }
 
   @Test()
   public void testDecodeGarbage() {