1 files changed, 113 insertions, 0 deletions
diff --git a/core/src/test/java/org/spongycastle/asn1/test/TagTest.java b/core/src/test/java/org/spongycastle/asn1/test/TagTest.java
new file mode 100644
index 00000000..cd497de3
--- /dev/null
+++ b/core/src/test/java/org/spongycastle/asn1/test/TagTest.java
@@ -0,0 +1,113 @@
+package org.spongycastle.asn1.test;
+
+import java.io.IOException;
+import java.security.SecureRandom;
+
+import org.spongycastle.asn1.ASN1InputStream;
+import org.spongycastle.asn1.ASN1Primitive;
+import org.spongycastle.asn1.ASN1TaggedObject;
+import org.spongycastle.asn1.DERApplicationSpecific;
+import org.spongycastle.util.encoders.Base64;
+import org.spongycastle.util.encoders.Hex;
+import org.spongycastle.util.test.SimpleTest;
+
+
+/**
+ * X.690 test example
+ */
+public class TagTest
+    extends SimpleTest
+{
+    byte[] longTagged = Base64.decode(
+                  "ZSRzIp8gEEZFRENCQTk4NzY1NDMyMTCfIQwyMDA2MDQwMTEyMzSUCCAFERVz"
+                + "A4kCAHEXGBkalAggBRcYGRqUCCAFZS6QAkRFkQlURUNITklLRVKSBQECAwQF"
+                + "kxAREhMUFRYXGBkalAggBREVcwOJAgBxFxgZGpQIIAUXGBkalAggBWUukAJE"
+                + "RZEJVEVDSE5JS0VSkgUBAgMEBZMQERITFBUWFxgZGpQIIAURFXMDiQIAcRcY"
+                + "GRqUCCAFFxgZGpQIIAVlLpACREWRCVRFQ0hOSUtFUpIFAQIDBAWTEBESExQV"
+                + "FhcYGRqUCCAFERVzA4kCAHEXGBkalAggBRcYGRqUCCAFFxgZGpQIIAUXGBka"
+                + "lAg=");
+
+    byte[] longAppSpecificTag = Hex.decode("5F610101");
+
+    public String getName()
+    {
+        return "Tag";
+    }
+    
+    public void performTest()
+        throws IOException
+    {
+        ASN1InputStream aIn = new ASN1InputStream(longTagged);
+
+        DERApplicationSpecific app = (DERApplicationSpecific)aIn.readObject();
+        
+        aIn = new ASN1InputStream(app.getContents());
+
+        app = (DERApplicationSpecific)aIn.readObject();
+
+        aIn = new ASN1InputStream(app.getContents());
+
+        ASN1TaggedObject tagged = (ASN1TaggedObject)aIn.readObject();
+
+        if (tagged.getTagNo() != 32)
+        {
+            fail("unexpected tag value found - not 32");
+        }
+
+        tagged = (ASN1TaggedObject)ASN1Primitive.fromByteArray(tagged.getEncoded());
+
+        if (tagged.getTagNo() != 32)
+        {
+            fail("unexpected tag value found on recode - not 32");
+        }
+
+        tagged = (ASN1TaggedObject)aIn.readObject();
+
+        if (tagged.getTagNo() != 33)
+        {
+            fail("unexpected tag value found - not 33");
+        }
+
+        tagged = (ASN1TaggedObject)ASN1Primitive.fromByteArray(tagged.getEncoded());
+
+        if (tagged.getTagNo() != 33)
+        {
+            fail("unexpected tag value found on recode - not 33");
+        }
+
+        aIn = new ASN1InputStream(longAppSpecificTag);
+
+        app = (DERApplicationSpecific)aIn.readObject();
+
+        if (app.getApplicationTag() != 97)
+        {
+            fail("incorrect tag number read");
+        }
+
+        app = (DERApplicationSpecific)ASN1Primitive.fromByteArray(app.getEncoded());
+
+        if (app.getApplicationTag() != 97)
+        {
+            fail("incorrect tag number read on recode");
+        }
+
+        SecureRandom sr = new SecureRandom();
+        for (int i = 0; i < 100; ++i)
+        {
+            int testTag = sr.nextInt() >>> (1 + (sr.nextInt() >>> 1) % 26);
+            app = new DERApplicationSpecific(testTag, new byte[]{ 1 });
+            app = (DERApplicationSpecific)ASN1Primitive.fromByteArray(app.getEncoded());
+
+            if (app.getApplicationTag() != testTag)
+            {
+                fail("incorrect tag number read on recode (random test value: " + testTag + ")");
+            }
+        }
+    }
+
+    public static void main(
+        String[]    args)
+    {
+        runTest(new TagTest());
+    }
+}