1/*
2 * Copyright (c) 2003, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24/**
25 * @test
26 * @bug 4815057 4839277
27 * @summary basic test of SHA1withDSA and RawDSA signing/verifying
28 * @author Andreas Sterbenz
29 * @key randomness
30 */
31
32import java.io.*;
33import java.util.*;
34import java.math.BigInteger;
35
36import java.security.*;
37import java.security.spec.*;
38
39public class TestDSA {
40
41    // values of the keys we use for the tests
42
43    private final static String ps =
44        "fd7f53811d75122952df4a9c2eece4e7f611b7523cef4400c31e3f80b6512669" +
45        "455d402251fb593d8d58fabfc5f5ba30f6cb9b556cd7813b801d346ff26660b7" +
46        "6b9950a5a49f9fe8047b1022c24fbba9d7feb7c61bf83b57e7c6a8a6150f04fb" +
47        "83f6d3c51ec3023554135a169132f675f3ae2b61d72aeff22203199dd14801c7";
48
49    private final static String qs =
50        "9760508f15230bccb292b982a2eb840bf0581cf5";
51
52    private final static String gs =
53        "f7e1a085d69b3ddecbbcab5c36b857b97994afbbfa3aea82f9574c0b3d078267" +
54        "5159578ebad4594fe67107108180b449167123e84c281613b7cf09328cc8a6e1" +
55        "3c167a8b547c8d28e0a3ae1e2bb3a675916ea37f0bfa213562f1fb627a01243b" +
56        "cca4f1bea8519089a883dfe15ae59f06928b665e807b552564014c3bfecf492a";
57
58    private final static String xs =
59        "2952afd9aef9527f9b40d23c8916f7d046028f9d";
60
61    private final static String ys =
62        "b16ddb0f9394c328c983ecf23b20014ace368a1af5728dffbf1162de9ed8ebf6" +
63        "384f323930e091503035caa797e3674221fc16136240b5474799ede2b7b11313" +
64        "7574a9c26bcf900940027b4bcd511ef1d1daf2e69c416aebaf3bdf39f02473b9" +
65        "d963f99414c09d97bb0830d9fbdcf7bb9dad8a2179fcdf296838c4cfab8f4d8f";
66
67    private final static BigInteger p = new BigInteger(ps, 16);
68    private final static BigInteger q = new BigInteger(qs, 16);
69    private final static BigInteger g = new BigInteger(gs, 16);
70    private final static BigInteger x = new BigInteger(xs, 16);
71    private final static BigInteger y = new BigInteger(ys, 16);
72
73    // data for test 1, original and SHA-1 hashed
74    private final static byte[] data1Raw = b("0102030405060708090a0b0c0d0e0f10111213");
75    private final static byte[] data1SHA = b("00:e2:5f:c9:1c:8f:d6:8c:6a:dc:c6:bd:f0:46:60:5e:a2:cd:8d:ad");
76
77    // valid signatures of data1. sig1b uses incorrect ASN.1 encoding,
78    // which we want to accept anyway for compatibility
79    private final static byte[] sig1a = b("30:2d:02:14:53:06:3f:7d:ec:48:3c:99:17:9a:2c:a9:4d:e8:00:da:70:fb:35:d7:02:15:00:92:6a:39:6b:15:63:2f:e7:32:90:35:bf:af:47:55:e7:ff:33:a5:13");
80    private final static byte[] sig1b = b("30:2c:02:14:53:06:3f:7d:ec:48:3c:99:17:9a:2c:a9:4d:e8:00:da:70:fb:35:d7:02:14:92:6a:39:6b:15:63:2f:e7:32:90:35:bf:af:47:55:e7:ff:33:a5:13");
81
82    // data for test 2 (invalid signatures)
83    private final static byte[] data2Raw = {};
84    private final static byte[] data2SHA = b("da:39:a3:ee:5e:6b:4b:0d:32:55:bf:ef:95:60:18:90:af:d8:07:09");
85
86    private static void verify(Provider provider, String alg, PublicKey key, byte[] data, byte[] sig, boolean result) throws Exception {
87        Signature s = Signature.getInstance(alg, provider);
88        s.initVerify(key);
89        boolean r;
90        s.update(data);
91        r = s.verify(sig);
92        if (r != result) {
93            throw new Exception("Result mismatch, actual: " + r);
94        }
95        s.update(data);
96        r = s.verify(sig);
97        if (r != result) {
98            throw new Exception("Result mismatch, actual: " + r);
99        }
100        System.out.println("Passed");
101    }
102
103    public static void main(String[] args) throws Exception {
104        long start = System.currentTimeMillis();
105
106        Provider provider = Security.getProvider("SUN");
107        System.out.println("Testing provider " + provider + "...");
108
109        KeyFactory kf = KeyFactory.getInstance("DSA", provider);
110        DSAPrivateKeySpec privSpec = new DSAPrivateKeySpec(x, p, q, g);
111        DSAPublicKeySpec pubSpec = new DSAPublicKeySpec(y, p, q, g);
112        PrivateKey privateKey = kf.generatePrivate(privSpec);
113        PublicKey publicKey = kf.generatePublic(pubSpec);
114
115        // verify known-good and known-bad signatures using SHA1withDSA and RawDSA
116        verify(provider, "SHA1withDSA", publicKey, data1Raw, sig1a, true);
117        verify(provider, "SHA1withDSA", publicKey, data1Raw, sig1b, true);
118        verify(provider, "SHA1withDSA", publicKey, data2Raw, sig1a, false);
119        verify(provider, "SHA1withDSA", publicKey, data2Raw, sig1b, false);
120
121        verify(provider, "RawDSA", publicKey, data1SHA, sig1a, true);
122        verify(provider, "RawDSA", publicKey, data1SHA, sig1b, true);
123        verify(provider, "RawDSA", publicKey, data2SHA, sig1a, false);
124        verify(provider, "RawDSA", publicKey, data2SHA, sig1b, false);
125
126        byte[] data = new byte[2048];
127        new Random().nextBytes(data);
128
129        // sign random data using SHA1withDSA and verify using
130        // SHA1withDSA and RawDSA
131        Signature s = Signature.getInstance("SHA1withDSA", provider);
132        s.initSign(privateKey);
133        s.update(data);
134        byte[] s1 = s.sign();
135
136        s.initVerify(publicKey);
137        s.update(data);
138        if (!s.verify(s1)) {
139            throw new Exception("Sign/verify 1 failed");
140        }
141
142        s = Signature.getInstance("RawDSA", provider);
143        MessageDigest md = MessageDigest.getInstance("SHA-1");
144        byte[] digest = md.digest(data);
145        s.initVerify(publicKey);
146        s.update(digest);
147        if (!s.verify(s1)) {
148            throw new Exception("Sign/verify 2 failed");
149        }
150
151        // sign random data using RawDSA and verify using
152        // SHA1withDSA and RawDSA
153        s.initSign(privateKey);
154        s.update(digest);
155        byte[] s2 = s.sign();
156
157        s.initVerify(publicKey);
158        s.update(digest);
159        if (!s.verify(s2)) {
160            throw new Exception("Sign/verify 3 failed");
161        }
162
163        s = Signature.getInstance("SHA1withDSA", provider);
164        s.initVerify(publicKey);
165        s.update(data);
166        if (!s.verify(s2)) {
167            throw new Exception("Sign/verify 4 failed");
168        }
169
170        // test behavior if data of incorrect length is passed
171        s = Signature.getInstance("RawDSA", provider);
172        s.initSign(privateKey);
173        s.update(new byte[8]);
174        s.update(new byte[64]);
175        try {
176            s.sign();
177            throw new Exception("No error RawDSA signing long data");
178        } catch (SignatureException e) {
179            // expected
180        }
181
182        long stop = System.currentTimeMillis();
183        System.out.println("All tests passed (" + (stop - start) + " ms).");
184    }
185
186    private final static char[] hexDigits = "0123456789abcdef".toCharArray();
187
188    public static String toString(byte[] b) {
189        StringBuffer sb = new StringBuffer(b.length * 3);
190        for (int i = 0; i < b.length; i++) {
191            int k = b[i] & 0xff;
192            if (i != 0) {
193                sb.append(':');
194            }
195            sb.append(hexDigits[k >>> 4]);
196            sb.append(hexDigits[k & 0xf]);
197        }
198        return sb.toString();
199    }
200
201    public static byte[] parse(String s) {
202        try {
203            int n = s.length();
204            ByteArrayOutputStream out = new ByteArrayOutputStream(n / 3);
205            StringReader r = new StringReader(s);
206            while (true) {
207                int b1 = nextNibble(r);
208                if (b1 < 0) {
209                    break;
210                }
211                int b2 = nextNibble(r);
212                if (b2 < 0) {
213                    throw new RuntimeException("Invalid string " + s);
214                }
215                int b = (b1 << 4) | b2;
216                out.write(b);
217            }
218            return out.toByteArray();
219        } catch (IOException e) {
220            throw new RuntimeException(e);
221        }
222    }
223
224    public static byte[] b(String s) {
225        return parse(s);
226    }
227
228    private static int nextNibble(StringReader r) throws IOException {
229        while (true) {
230            int ch = r.read();
231            if (ch == -1) {
232                return -1;
233            } else if ((ch >= '0') && (ch <= '9')) {
234                return ch - '0';
235            } else if ((ch >= 'a') && (ch <= 'f')) {
236                return ch - 'a' + 10;
237            } else if ((ch >= 'A') && (ch <= 'F')) {
238                return ch - 'A' + 10;
239            }
240        }
241    }
242
243}
244