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/*
* Copyright (c) 2023, 2024, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/**
* @test
* @bug 8320597
* @summary Verify RSA signature with omitted digest params (should be encoded as NULL)
* for backward compatibility
*/
import java.security.KeyFactory;
import java.security.Signature;
import java.security.spec.X509EncodedKeySpec;
import java.util.Base64;
public class WithoutNULL {
public static void main(String[] args) throws Exception {
// A 1024-bit RSA public key
byte[] key = Base64.getMimeDecoder().decode("""
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCrfTrEm4KvdFSpGAM7InrFEzALTKdphT9fK6Gu
eVjHtKsuCSEaULCdjhJvPpFK40ONr1JEC1Ywp1UYrfBBdKunnbDZqNZL1cFv+IzF4Yj6JO6pOeHi
1Zpur1GaQRRlYTvzmyWY/AATQDh8JfKObNnDVwXeezFODUG8h5+XL1ZXZQIDAQAB""");
// A SHA1withRSA signature on an empty input where the digestAlgorithm
// inside DigestInfo does not have a parameters field.
byte[] sig = Base64.getMimeDecoder().decode("""
D1FpiT44WEXlDfYK880bdorLO+e9qJVXZWiBgqs9dfK7lYQwyEt9dL23mbUAKm5TVEj2ZxtHkEvk
b8oaWkxk069jDTM1RhllPJZkAjeQRbw4gkg4N6wKZz9B/jdSRMNJg/b9QdRYZOHOBxsEHMbUREPV
DoCOLaxB8eIXX0EWkiE=""");
Signature s = Signature.getInstance("SHA1withRSA",
System.getProperty("test.provider.name", "SunRsaSign"));
s.initVerify(KeyFactory.getInstance("RSA").generatePublic(new X509EncodedKeySpec(key)));
if (!s.verify(sig)) {
throw new RuntimeException("Does not verify");
}
}
}
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