/* * Copyright (c) 2003, 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 4894151 7055362 * @summary known answer test for OAEP encryption * @author Andreas Sterbenz */ import java.io.*; import java.math.BigInteger; import java.util.*; import java.util.regex.*; import java.security.*; import java.security.spec.*; import javax.crypto.*; /** * Known answer test for OAEP encryption. The "oaep-vect.txt" file was taken * from the RSA Security web site. It contains a number of test cases using * keys of various lengths. * * Note that we only test decryption. We cannot do a KAT encryption test * because our APIs do now allow us to explicitly specify the seed. * Encryption is tested in a different test case. */ public class TestOAEP_KAT { private final static String BASE = System.getProperty("test.src", "."); private static BigInteger n, e, d, p, q, pe, qe, coeff; private static byte[] plainText, seed, cipherText, cipherText2; public static void main(String[] args) throws Exception { long start = System.currentTimeMillis(); Provider provider = Security.getProvider( System.getProperty("test.provider.name", "SunJCE")); Provider kfProvider = Security.getProvider( System.getProperty("test.provider.name", "SunRsaSign")); System.out.println("Testing provider " + provider.getName() + "..."); Cipher c = Cipher.getInstance("RSA/ECB/OAEPwithSHA1andMGF1Padding", provider); KeyFactory kf = KeyFactory.getInstance("RSA", kfProvider); try (InputStream in = new FileInputStream(new File(BASE, "oaep-vect.txt")); BufferedReader reader = new BufferedReader(new InputStreamReader(in, "UTF8"))) { while (true) { String line = reader.readLine(); if (line == null) { break; } line = line.trim(); if (line.length() == 0) { continue; } if (line.equals("# RSA modulus n:")) { n = parseNumber(reader); } else if (line.equals("# RSA public exponent e:")) { e = parseNumber(reader); } else if (line.equals("# RSA private exponent d:")) { d = parseNumber(reader); } else if (line.equals("# Prime p:")) { p = parseNumber(reader); } else if (line.equals("# Prime q:")) { q = parseNumber(reader); } else if (line.equals("# p's CRT exponent dP:")) { pe = parseNumber(reader); } else if (line.equals("# q's CRT exponent dQ:")) { qe = parseNumber(reader); } else if (line.equals("# CRT coefficient qInv:")) { coeff = parseNumber(reader); } else if (line.equals("# Message to be encrypted:")) { plainText = parseBytes(reader); } else if (line.equals("# Seed:")) { seed = parseBytes(reader); } else if (line.equals("# Encryption:")) { cipherText = parseBytes(reader); // do encryption test first KeySpec pubSpec = new RSAPublicKeySpec(n, e); PublicKey pubKey = kf.generatePublic(pubSpec); c.init(Cipher.ENCRYPT_MODE, pubKey, new MyRandom(seed)); cipherText2 = c.doFinal(plainText); if (Arrays.equals(cipherText2, cipherText) == false) { throw new Exception("Encryption mismatch"); } // followed by decryption test KeySpec privSpec = new RSAPrivateCrtKeySpec(n, e, d, p, q, pe, qe, coeff); PrivateKey privKey = kf.generatePrivate(privSpec); c.init(Cipher.DECRYPT_MODE, privKey); byte[] dec = c.doFinal(cipherText); if (Arrays.equals(plainText, dec) == false) { throw new Exception("Decryption mismatch"); } } else if (line.startsWith("# ------------------------------")) { // ignore, do not print } else { // unknown line (comment), print System.out.println(": " + line); } } } long stop = System.currentTimeMillis(); System.out.println("Done (" + (stop - start) + " ms)."); } private static BigInteger parseNumber(BufferedReader reader) throws IOException { return new BigInteger(1, parseBytes(reader)); } private static byte[] parseBytes(BufferedReader reader) throws IOException { ByteArrayOutputStream buffer = new ByteArrayOutputStream(); while (true) { String line = reader.readLine(); if (line == null) { throw new EOFException("Unexpected EOF"); } line = line.trim(); if (line.length() == 0) { break; } buffer.write(parse(line)); } return buffer.toByteArray(); } public static byte[] parse(String s) { try { int n = s.length(); ByteArrayOutputStream out = new ByteArrayOutputStream(n / 3); StringReader r = new StringReader(s); while (true) { int b1 = nextNibble(r); if (b1 < 0) { break; } int b2 = nextNibble(r); if (b2 < 0) { throw new RuntimeException("Invalid string " + s); } int b = (b1 << 4) | b2; out.write(b); } return out.toByteArray(); } catch (IOException e) { throw new RuntimeException(e); } } public static byte[] b(String s) { return parse(s); } private static int nextNibble(StringReader r) throws IOException { while (true) { int ch = r.read(); if (ch == -1) { return -1; } else if ((ch >= '0') && (ch <= '9')) { return ch - '0'; } else if ((ch >= 'a') && (ch <= 'f')) { return ch - 'a' + 10; } else if ((ch >= 'A') && (ch <= 'F')) { return ch - 'A' + 10; } } } } class MyRandom extends SecureRandom { private byte[] source; private int count; MyRandom(byte[] source) { this.source = (byte[]) source.clone(); count = 0; } public void nextBytes(byte[] bytes) { if (bytes.length > source.length - count) { throw new RuntimeException("Insufficient random data"); } System.arraycopy(source, count, bytes, 0, bytes.length); count += bytes.length; } }