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23 
24 /* @test
25  * @bug 8051408 8158534
26  * @summary Make sure DrbgParameters coded as specified
27  * @library /test/lib
28  * @build jdk.test.lib.Asserts
29  * @run main DrbgParametersSpec
30  */
31 
32 import jdk.test.lib.Asserts;
33 
34 import java.security.DrbgParameters;
35 import java.util.Arrays;
36 
37 import static java.security.DrbgParameters.Capability.*;
main(String[] args)38 
39 public class DrbgParametersSpec {
40 
41     public static void main(String args[]) throws Exception {
42 
43         byte[] p, np1, np2;
44 
45         // Capability
46         Asserts.assertTrue(PR_AND_RESEED.supportsPredictionResistance());
47         Asserts.assertTrue(PR_AND_RESEED.supportsReseeding());
48         Asserts.assertFalse(RESEED_ONLY.supportsPredictionResistance());
49         Asserts.assertTrue(RESEED_ONLY.supportsReseeding());
50         Asserts.assertFalse(NONE.supportsPredictionResistance());
51         Asserts.assertFalse(NONE.supportsReseeding());
52 
53         // Instantiation
54         p = "Instantiation".getBytes();
55         DrbgParameters.Instantiation ins = DrbgParameters
56                 .instantiation(192, RESEED_ONLY, p);
57         Asserts.assertTrue(ins.getStrength() == 192);
58         Asserts.assertTrue(ins.getCapability() == RESEED_ONLY);
59         np1 = ins.getPersonalizationString();
60         np2 = ins.getPersonalizationString();
61         // Getter outputs have same content but not the same object
62         Asserts.assertTrue(Arrays.equals(np1, p));
63         Asserts.assertTrue(Arrays.equals(np2, p));
64         Asserts.assertNE(np1, np2);
65         // Changes to original input has no affect on object
66         p[0] = 'X';
67         np2 = ins.getPersonalizationString();
68         Asserts.assertTrue(Arrays.equals(np1, np2));
69 
70         ins = DrbgParameters.instantiation(-1, NONE, null);
71         Asserts.assertNull(ins.getPersonalizationString());
72 
73         iae(() -> DrbgParameters.instantiation(-2, NONE, null));
74         npe(() -> DrbgParameters.instantiation(-1, null, null));
75 
76         // NextBytes
77         p = "NextBytes".getBytes();
78         DrbgParameters.NextBytes nb = DrbgParameters
79                 .nextBytes(192, true, p);
80         Asserts.assertTrue(nb.getStrength() == 192);
81         Asserts.assertTrue(nb.getPredictionResistance());
82         np1 = nb.getAdditionalInput();
83         np2 = nb.getAdditionalInput();
84         // Getter outputs have same content but not the same object
85         Asserts.assertTrue(Arrays.equals(np1, p));
86         Asserts.assertTrue(Arrays.equals(np2, p));
87         Asserts.assertNE(np1, np2);
88         // Changes to original input has no affect on object
89         p[0] = 'X';
90         np2 = nb.getAdditionalInput();
91         Asserts.assertTrue(Arrays.equals(np1, np2));
92 
93         iae(() -> DrbgParameters.nextBytes(-2, false, null));
94 
95         // Reseed
96         p = "Reseed".getBytes();
97         DrbgParameters.Reseed rs = DrbgParameters
98                 .reseed(true, p);
99         Asserts.assertTrue(rs.getPredictionResistance());
100         np1 = rs.getAdditionalInput();
101         np2 = rs.getAdditionalInput();
102         // Getter outputs have same content but not the same object
103         Asserts.assertTrue(Arrays.equals(np1, p));
104         Asserts.assertTrue(Arrays.equals(np2, p));
105         Asserts.assertNE(np1, np2);
106         // Changes to original input has no affect on object
107         p[0] = 'X';
108         np2 = rs.getAdditionalInput();
109         Asserts.assertTrue(Arrays.equals(np1, np2));
110     }
111 
112     static void iae(RunnableWithException r) throws Exception {
113         checkException(r, IllegalArgumentException.class);
114     }
115 
116     static void npe(RunnableWithException r) throws Exception {
117         checkException(r, NullPointerException.class);
118     }
119 
120     interface RunnableWithException {
121         void run() throws Exception;
122     }
123 
124     static void checkException(RunnableWithException r, Class ex)
125             throws Exception {
126         try {
127             r.run();
128         } catch (Exception e) {
129             if (ex.isAssignableFrom(e.getClass())) {
130                 return;
131             }
132             throw e;
133         }
134         throw new Exception("No exception thrown");
135     }
136 }
137