add test for CRCRLF armored files

This is an incorrect format that has been generated by GPG4USB (any
possibly GPG4WIN) for a long time. We better be compatible :(

OpenKeychain/src/test/java/org/sufficientlysecure/keychain/ArmoredInputStreamTest.java

@@ -0,0 +1,43 @@
+package org.sufficientlysecure.keychain;
+
+
+import java.io.InputStream;
+
+import org.bouncycastle.bcpg.ArmoredInputStream;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.sufficientlysecure.keychain.pgp.UncachedKeyringTest;
+import org.sufficientlysecure.keychain.support.TestDataUtil;
+
+import static org.junit.Assert.assertArrayEquals;
+import static org.junit.Assert.assertEquals;
+
+
+@RunWith(KeychainTestRunner.class)
+public class ArmoredInputStreamTest {
+
+    @Test
+    public void armoredInputStream__withDifferentLineEndings() throws Exception {
+        // these are generated by GPG4USB, see https://github.com/gpg4usb/gpg4usb/issues/25
+        ArmoredInputStream stream1 = new ArmoredInputStream(UncachedKeyringTest.class.getResourceAsStream("/armored_crcrlf.asc"));
+        ArmoredInputStream stream2 = new ArmoredInputStream(UncachedKeyringTest.class.getResourceAsStream("/armored_crlf.asc"));
+        ArmoredInputStream stream3 = new ArmoredInputStream(UncachedKeyringTest.class.getResourceAsStream("/armored_lf.asc"));
+
+        assertEquals(1, stream1.getArmorHeaders().length);
+        assertEquals("Comment: comment content", stream1.getArmorHeaders()[0]);
+
+        assertEquals(1, stream2.getArmorHeaders().length);
+        assertEquals("Comment: comment content", stream2.getArmorHeaders()[0]);
+
+        assertEquals(1, stream3.getArmorHeaders().length);
+        assertEquals("Comment: comment content", stream3.getArmorHeaders()[0]);
+
+        byte[] data1 = TestDataUtil.readFully(stream1);
+        byte[] data2 = TestDataUtil.readFully(stream2);
+        byte[] data3 = TestDataUtil.readFully(stream3);
+
+        assertArrayEquals(data1, data2);
+        assertArrayEquals(data1, data3);
+    }
+
+}