/* * Copyright (c) 2020, 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 8255494 * @summary Make sure the signature algorithm to verify a PKCS7 block is * DIGwithENC instead of HASHwithENC. * @modules java.base/sun.security.pkcs * java.base/sun.security.tools.keytool * java.base/sun.security.x509
*/
byte[] content = "Hello You fool I love you".getBytes();
CertAndKeyGen cak = new CertAndKeyGen("EC", "SHA512withECDSA");
cak.generate("secp256r1"); byte[] signature = PKCS7.generateNewSignedData( "SHA256withECDSA", null,
cak.getPrivateKey(), new X509Certificate[] {cak.getSelfCertificate(new X500Name("CN=Me"), 1000)},
content, false, true, // direct sign, so that RFC 6211 check is not possible null);
// The original signature should verify. if (new PKCS7(signature).verify(content) == null) { thrownew RuntimeException("Should be verified");
}
// Modify the SHA256withECDSA signature algorithm (OID encoded as // "06 08 2A 86 48 CE 3D 04 03 02") to SHA384withECDSA (OID encoded as // "06 08 2A 86 48 CE 3D 04 03 03"). ISO_8859_1 charset is chosen // because it's a strictly one byte per char encoding.
String s = new String(signature, StandardCharsets.ISO_8859_1);
String s1 = s.replace( "\u0006\u0008\u002A\u0086\u0048\u00CE\u003D\u0004\u0003\u0002", "\u0006\u0008\u002A\u0086\u0048\u00CE\u003D\u0004\u0003\u0003"); byte[] modified = s1.getBytes(StandardCharsets.ISO_8859_1);
// The modified signature should still verify because the HASH // part of signature algorithm is ignored. if (new PKCS7(modified).verify(content) == null) { thrownew RuntimeException("Should be verified");
}
}
}
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