FilePassRecord type of 4 is now documented as the same as 2 & 3, see bug #35897

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1636776 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/poi/hssf/record/FilePassRecord.java

@@ -45,6 +45,7 @@ public final class FilePassRecord extends StandardRecord {
 	    private static final int ENCRYPTION_OTHER_RC4 = 1;
 	    private static final int ENCRYPTION_OTHER_CAPI_2 = 2;
 	    private static final int ENCRYPTION_OTHER_CAPI_3 = 3;
+        private static final int ENCRYPTION_OTHER_CAPI_4 = 4;
 	    
 	    private byte[] _salt;
 	    private byte[] _encryptedVerifier;
@@ -60,6 +61,7 @@ public final class FilePassRecord extends StandardRecord {
 	                break;
 	            case ENCRYPTION_OTHER_CAPI_2:
 	            case ENCRYPTION_OTHER_CAPI_3:
+                case ENCRYPTION_OTHER_CAPI_4:
 	                throw new EncryptedDocumentException(
 	                        "HSSF does not currently support CryptoAPI encryption");
 	            default:

src/testcases/org/apache/poi/hssf/dev/TestBiffViewer.java

@@ -36,6 +36,7 @@ public class TestBiffViewer extends BaseXLSIteratingTest {
 		SILENT_EXCLUDED.add("43493.xls");	// HSSFWorkbook cannot open it as well
 		SILENT_EXCLUDED.add("password.xls"); 
 		SILENT_EXCLUDED.add("46904.xls");
+        SILENT_EXCLUDED.add("35897-type4.xls"); // unsupported crypto api header 
 		SILENT_EXCLUDED.add("xor-encryption-abc.xls"); // unsupported XOR-encryption
 	}
 

src/testcases/org/apache/poi/hssf/usermodel/TestBugs.java

@@ -2460,6 +2460,13 @@ public final class TestBugs extends BaseTestBugzillaIssues {
         } finally {
             Biff8EncryptionKey.setCurrentUserPassword(null);
         }
+        
+        // One using the only-recently-documented encryption header type 4,
+        //  and the RC4 CryptoAPI encryption header structure
+        try {
+            openSample("35897-type4.xls");
+            fail("POI doesn't currently support the RC4 CryptoAPI encryption header structure");
+        } catch (EncryptedDocumentException e) {}
     }
 
     @Test