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org.testifyproject.bouncycastle.crypto.test.GCMTest Maven / Gradle / Ivy
package org.testifyproject.bouncycastle.crypto.test;
import java.security.SecureRandom;
import org.testifyproject.bouncycastle.crypto.BlockCipher;
import org.testifyproject.bouncycastle.crypto.InvalidCipherTextException;
import org.testifyproject.bouncycastle.crypto.engines.AESFastEngine;
import org.testifyproject.bouncycastle.crypto.engines.DESEngine;
import org.testifyproject.bouncycastle.crypto.modes.GCMBlockCipher;
import org.testifyproject.bouncycastle.crypto.modes.gcm.BasicGCMMultiplier;
import org.testifyproject.bouncycastle.crypto.modes.gcm.GCMMultiplier;
import org.testifyproject.bouncycastle.crypto.modes.gcm.Tables64kGCMMultiplier;
import org.testifyproject.bouncycastle.crypto.modes.gcm.Tables8kGCMMultiplier;
import org.testifyproject.bouncycastle.crypto.params.AEADParameters;
import org.testifyproject.bouncycastle.crypto.params.KeyParameter;
import org.testifyproject.bouncycastle.util.Times;
import org.testifyproject.bouncycastle.util.encoders.Hex;
import org.testifyproject.bouncycastle.util.test.SimpleTest;
/**
* Test vectors from "The Galois/Counter Mode of Operation (GCM)", McGrew/Viega, Appendix B
*/
public class GCMTest
extends SimpleTest
{
private static final String[][] TEST_VECTORS = new String[][] {
{
"Test Case 1",
"00000000000000000000000000000000",
"",
"",
"000000000000000000000000",
"",
"58e2fccefa7e3061367f1d57a4e7455a",
},
{
"Test Case 2",
"00000000000000000000000000000000",
"00000000000000000000000000000000",
"",
"000000000000000000000000",
"0388dace60b6a392f328c2b971b2fe78",
"ab6e47d42cec13bdf53a67b21257bddf",
},
{
"Test Case 3",
"feffe9928665731c6d6a8f9467308308",
"d9313225f88406e5a55909c5aff5269a"
+ "86a7a9531534f7da2e4c303d8a318a72"
+ "1c3c0c95956809532fcf0e2449a6b525"
+ "b16aedf5aa0de657ba637b391aafd255",
"",
"cafebabefacedbaddecaf888",
"42831ec2217774244b7221b784d0d49c"
+ "e3aa212f2c02a4e035c17e2329aca12e"
+ "21d514b25466931c7d8f6a5aac84aa05"
+ "1ba30b396a0aac973d58e091473f5985",
"4d5c2af327cd64a62cf35abd2ba6fab4",
},
{
"Test Case 4",
"feffe9928665731c6d6a8f9467308308",
"d9313225f88406e5a55909c5aff5269a"
+ "86a7a9531534f7da2e4c303d8a318a72"
+ "1c3c0c95956809532fcf0e2449a6b525"
+ "b16aedf5aa0de657ba637b39",
"feedfacedeadbeeffeedfacedeadbeef"
+ "abaddad2",
"cafebabefacedbaddecaf888",
"42831ec2217774244b7221b784d0d49c"
+ "e3aa212f2c02a4e035c17e2329aca12e"
+ "21d514b25466931c7d8f6a5aac84aa05"
+ "1ba30b396a0aac973d58e091",
"5bc94fbc3221a5db94fae95ae7121a47",
},
{
"Test Case 5",
"feffe9928665731c6d6a8f9467308308",
"d9313225f88406e5a55909c5aff5269a"
+ "86a7a9531534f7da2e4c303d8a318a72"
+ "1c3c0c95956809532fcf0e2449a6b525"
+ "b16aedf5aa0de657ba637b39",
"feedfacedeadbeeffeedfacedeadbeef"
+ "abaddad2",
"cafebabefacedbad",
"61353b4c2806934a777ff51fa22a4755"
+ "699b2a714fcdc6f83766e5f97b6c7423"
+ "73806900e49f24b22b097544d4896b42"
+ "4989b5e1ebac0f07c23f4598",
"3612d2e79e3b0785561be14aaca2fccb",
},
{
"Test Case 6",
"feffe9928665731c6d6a8f9467308308",
"d9313225f88406e5a55909c5aff5269a"
+ "86a7a9531534f7da2e4c303d8a318a72"
+ "1c3c0c95956809532fcf0e2449a6b525"
+ "b16aedf5aa0de657ba637b39",
"feedfacedeadbeeffeedfacedeadbeef"
+ "abaddad2",
"9313225df88406e555909c5aff5269aa"
+ "6a7a9538534f7da1e4c303d2a318a728"
+ "c3c0c95156809539fcf0e2429a6b5254"
+ "16aedbf5a0de6a57a637b39b",
"8ce24998625615b603a033aca13fb894"
+ "be9112a5c3a211a8ba262a3cca7e2ca7"
+ "01e4a9a4fba43c90ccdcb281d48c7c6f"
+ "d62875d2aca417034c34aee5",
"619cc5aefffe0bfa462af43c1699d050",
},
{
"Test Case 7",
"00000000000000000000000000000000"
+ "0000000000000000",
"",
"",
"000000000000000000000000",
"",
"cd33b28ac773f74ba00ed1f312572435",
},
{
"Test Case 8",
"00000000000000000000000000000000"
+ "0000000000000000",
"00000000000000000000000000000000",
"",
"000000000000000000000000",
"98e7247c07f0fe411c267e4384b0f600",
"2ff58d80033927ab8ef4d4587514f0fb",
},
{
"Test Case 9",
"feffe9928665731c6d6a8f9467308308"
+ "feffe9928665731c",
"d9313225f88406e5a55909c5aff5269a"
+ "86a7a9531534f7da2e4c303d8a318a72"
+ "1c3c0c95956809532fcf0e2449a6b525"
+ "b16aedf5aa0de657ba637b391aafd255",
"",
"cafebabefacedbaddecaf888",
"3980ca0b3c00e841eb06fac4872a2757"
+ "859e1ceaa6efd984628593b40ca1e19c"
+ "7d773d00c144c525ac619d18c84a3f47"
+ "18e2448b2fe324d9ccda2710acade256",
"9924a7c8587336bfb118024db8674a14",
},
{
"Test Case 10",
"feffe9928665731c6d6a8f9467308308"
+ "feffe9928665731c",
"d9313225f88406e5a55909c5aff5269a"
+ "86a7a9531534f7da2e4c303d8a318a72"
+ "1c3c0c95956809532fcf0e2449a6b525"
+ "b16aedf5aa0de657ba637b39",
"feedfacedeadbeeffeedfacedeadbeef"
+ "abaddad2",
"cafebabefacedbaddecaf888",
"3980ca0b3c00e841eb06fac4872a2757"
+ "859e1ceaa6efd984628593b40ca1e19c"
+ "7d773d00c144c525ac619d18c84a3f47"
+ "18e2448b2fe324d9ccda2710",
"2519498e80f1478f37ba55bd6d27618c",
},
{
"Test Case 11",
"feffe9928665731c6d6a8f9467308308"
+ "feffe9928665731c",
"d9313225f88406e5a55909c5aff5269a"
+ "86a7a9531534f7da2e4c303d8a318a72"
+ "1c3c0c95956809532fcf0e2449a6b525"
+ "b16aedf5aa0de657ba637b39",
"feedfacedeadbeeffeedfacedeadbeef"
+ "abaddad2",
"cafebabefacedbad",
"0f10f599ae14a154ed24b36e25324db8"
+ "c566632ef2bbb34f8347280fc4507057"
+ "fddc29df9a471f75c66541d4d4dad1c9"
+ "e93a19a58e8b473fa0f062f7",
"65dcc57fcf623a24094fcca40d3533f8",
},
{
"Test Case 12",
"feffe9928665731c6d6a8f9467308308"
+ "feffe9928665731c",
"d9313225f88406e5a55909c5aff5269a"
+ "86a7a9531534f7da2e4c303d8a318a72"
+ "1c3c0c95956809532fcf0e2449a6b525"
+ "b16aedf5aa0de657ba637b39",
"feedfacedeadbeeffeedfacedeadbeef"
+ "abaddad2",
"9313225df88406e555909c5aff5269aa"
+ "6a7a9538534f7da1e4c303d2a318a728"
+ "c3c0c95156809539fcf0e2429a6b5254"
+ "16aedbf5a0de6a57a637b39b",
"d27e88681ce3243c4830165a8fdcf9ff"
+ "1de9a1d8e6b447ef6ef7b79828666e45"
+ "81e79012af34ddd9e2f037589b292db3"
+ "e67c036745fa22e7e9b7373b",
"dcf566ff291c25bbb8568fc3d376a6d9",
},
{
"Test Case 13",
"00000000000000000000000000000000"
+ "00000000000000000000000000000000",
"",
"",
"000000000000000000000000",
"",
"530f8afbc74536b9a963b4f1c4cb738b",
},
{
"Test Case 14",
"00000000000000000000000000000000"
+ "00000000000000000000000000000000",
"00000000000000000000000000000000",
"",
"000000000000000000000000",
"cea7403d4d606b6e074ec5d3baf39d18",
"d0d1c8a799996bf0265b98b5d48ab919",
},
{
"Test Case 15",
"feffe9928665731c6d6a8f9467308308"
+ "feffe9928665731c6d6a8f9467308308",
"d9313225f88406e5a55909c5aff5269a"
+ "86a7a9531534f7da2e4c303d8a318a72"
+ "1c3c0c95956809532fcf0e2449a6b525"
+ "b16aedf5aa0de657ba637b391aafd255",
"",
"cafebabefacedbaddecaf888",
"522dc1f099567d07f47f37a32a84427d"
+ "643a8cdcbfe5c0c97598a2bd2555d1aa"
+ "8cb08e48590dbb3da7b08b1056828838"
+ "c5f61e6393ba7a0abcc9f662898015ad",
"b094dac5d93471bdec1a502270e3cc6c",
},
{
"Test Case 16",
"feffe9928665731c6d6a8f9467308308"
+ "feffe9928665731c6d6a8f9467308308",
"d9313225f88406e5a55909c5aff5269a"
+ "86a7a9531534f7da2e4c303d8a318a72"
+ "1c3c0c95956809532fcf0e2449a6b525"
+ "b16aedf5aa0de657ba637b39",
"feedfacedeadbeeffeedfacedeadbeef"
+ "abaddad2",
"cafebabefacedbaddecaf888",
"522dc1f099567d07f47f37a32a84427d"
+ "643a8cdcbfe5c0c97598a2bd2555d1aa"
+ "8cb08e48590dbb3da7b08b1056828838"
+ "c5f61e6393ba7a0abcc9f662",
"76fc6ece0f4e1768cddf8853bb2d551b",
},
{
"Test Case 17",
"feffe9928665731c6d6a8f9467308308"
+ "feffe9928665731c6d6a8f9467308308",
"d9313225f88406e5a55909c5aff5269a"
+ "86a7a9531534f7da2e4c303d8a318a72"
+ "1c3c0c95956809532fcf0e2449a6b525"
+ "b16aedf5aa0de657ba637b39",
"feedfacedeadbeeffeedfacedeadbeef"
+ "abaddad2",
"cafebabefacedbad",
"c3762df1ca787d32ae47c13bf19844cb"
+ "af1ae14d0b976afac52ff7d79bba9de0"
+ "feb582d33934a4f0954cc2363bc73f78"
+ "62ac430e64abe499f47c9b1f",
"3a337dbf46a792c45e454913fe2ea8f2",
},
{
"Test Case 18",
"feffe9928665731c6d6a8f9467308308"
+ "feffe9928665731c6d6a8f9467308308",
"d9313225f88406e5a55909c5aff5269a"
+ "86a7a9531534f7da2e4c303d8a318a72"
+ "1c3c0c95956809532fcf0e2449a6b525"
+ "b16aedf5aa0de657ba637b39",
"feedfacedeadbeeffeedfacedeadbeef"
+ "abaddad2",
"9313225df88406e555909c5aff5269aa"
+ "6a7a9538534f7da1e4c303d2a318a728"
+ "c3c0c95156809539fcf0e2429a6b5254"
+ "16aedbf5a0de6a57a637b39b",
"5a8def2f0c9e53f1f75d7853659e2a20"
+ "eeb2b22aafde6419a058ab4f6f746bf4"
+ "0fc0c3b780f244452da3ebf1c5d82cde"
+ "a2418997200ef82e44ae7e3f",
"a44a8266ee1c8eb0c8b5d4cf5ae9f19a",
},
};
public String getName()
{
return "GCM";
}
public void performTest() throws Exception
{
for (int i = 0; i < TEST_VECTORS.length; ++i)
{
runTestCase(TEST_VECTORS[i]);
}
randomTests();
outputSizeTests();
testExceptions();
}
protected BlockCipher createAESEngine()
{
return new AESFastEngine();
}
private void testExceptions() throws InvalidCipherTextException
{
GCMBlockCipher gcm = new GCMBlockCipher(createAESEngine());
try
{
gcm = new GCMBlockCipher(new DESEngine());
fail("incorrect block size not picked up");
}
catch (IllegalArgumentException e)
{
// expected
}
try
{
gcm.init(false, new KeyParameter(new byte[16]));
fail("illegal argument not picked up");
}
catch (IllegalArgumentException e)
{
// expected
}
AEADTestUtil.testReset(this, new GCMBlockCipher(createAESEngine()), new GCMBlockCipher(createAESEngine()), new AEADParameters(new KeyParameter(new byte[16]), 128, new byte[16]));
AEADTestUtil.testTampering(this, gcm, new AEADParameters(new KeyParameter(new byte[16]), 128, new byte[16]));
AEADTestUtil.testOutputSizes(this, new GCMBlockCipher(createAESEngine()), new AEADParameters(new KeyParameter(
new byte[16]), 128, new byte[16]));
AEADTestUtil.testBufferSizeChecks(this, new GCMBlockCipher(createAESEngine()), new AEADParameters(
new KeyParameter(new byte[16]), 128, new byte[16]));
}
private void runTestCase(String[] testVector)
throws InvalidCipherTextException
{
for (int macLength = 12; macLength <= 16; ++macLength)
{
runTestCase(testVector, macLength);
}
}
private void runTestCase(String[] testVector, int macLength)
throws InvalidCipherTextException
{
int pos = 0;
String testName = testVector[pos++];
byte[] K = Hex.org.testifyproject.testifyprojectcode(testVector[pos++]);
byte[] P = Hex.org.testifyproject.testifyprojectcode(testVector[pos++]);
byte[] A = Hex.org.testifyproject.testifyprojectcode(testVector[pos++]);
byte[] IV = Hex.org.testifyproject.testifyprojectcode(testVector[pos++]);
byte[] C = Hex.org.testifyproject.testifyprojectcode(testVector[pos++]);
// For short MAC, take leading bytes
byte[] t = Hex.org.testifyproject.testifyprojectcode(testVector[pos++]);
byte[] T = new byte[macLength];
System.arraycopy(t, 0, T, 0, T.length);
// Default multiplier
runTestCase(null, null, testName, K, IV, A, P, C, T);
runTestCase(new BasicGCMMultiplier(), new BasicGCMMultiplier(), testName, K, IV, A, P, C, T);
runTestCase(new Tables8kGCMMultiplier(), new Tables8kGCMMultiplier(), testName, K, IV, A, P, C, T);
runTestCase(new Tables64kGCMMultiplier(), new Tables64kGCMMultiplier(), testName, K, IV, A, P, C, T);
}
private void runTestCase(
GCMMultiplier encM,
GCMMultiplier org.testifyproject.testifyprojectcM,
String testName,
byte[] K,
byte[] IV,
byte[] A,
byte[] P,
byte[] C,
byte[] T)
throws InvalidCipherTextException
{
byte[] fa = new byte[A.length / 2];
byte[] la = new byte[A.length - (A.length / 2)];
System.arraycopy(A, 0, fa, 0, fa.length);
System.arraycopy(A, fa.length, la, 0, la.length);
runTestCase(encM, org.testifyproject.testifyprojectcM, testName + " all initial associated data", K, IV, A, null, P, C, T);
runTestCase(encM, org.testifyproject.testifyprojectcM, testName + " all subsequent associated data", K, IV, null, A, P, C, T);
runTestCase(encM, org.testifyproject.testifyprojectcM, testName + " split associated data", K, IV, fa, la, P, C, T);
}
private void runTestCase(
GCMMultiplier encM,
GCMMultiplier org.testifyproject.testifyprojectcM,
String testName,
byte[] K,
byte[] IV,
byte[] A,
byte[] SA,
byte[] P,
byte[] C,
byte[] T)
throws InvalidCipherTextException
{
AEADParameters parameters = new AEADParameters(new KeyParameter(K), T.length * 8, IV, A);
GCMBlockCipher encCipher = initCipher(encM, true, parameters);
GCMBlockCipher org.testifyproject.testifyprojectcCipher = initCipher(org.testifyproject.testifyprojectcM, false, parameters);
checkTestCase(encCipher, org.testifyproject.testifyprojectcCipher, testName, SA, P, C, T);
checkTestCase(encCipher, org.testifyproject.testifyprojectcCipher, testName + " (reused)", SA, P, C, T);
// Key reuse
AEADParameters keyReuseParams = AEADTestUtil.reuseKey(parameters);
encCipher.init(true, keyReuseParams);
org.testifyproject.testifyprojectcCipher.init(false, keyReuseParams);
checkTestCase(encCipher, org.testifyproject.testifyprojectcCipher, testName + " (key reuse)", SA, P, C, T);
}
private GCMBlockCipher initCipher(GCMMultiplier m, boolean forEncryption, AEADParameters parameters)
{
GCMBlockCipher c = new GCMBlockCipher(createAESEngine(), m);
c.init(forEncryption, parameters);
return c;
}
private void checkTestCase(
GCMBlockCipher encCipher,
GCMBlockCipher org.testifyproject.testifyprojectcCipher,
String testName,
byte[] SA,
byte[] P,
byte[] C,
byte[] T)
throws InvalidCipherTextException
{
byte[] enc = new byte[encCipher.getOutputSize(P.length)];
if (SA != null)
{
encCipher.processAADBytes(SA, 0, SA.length);
}
int len = encCipher.processBytes(P, 0, P.length, enc, 0);
len += encCipher.doFinal(enc, len);
if (enc.length != len)
{
// System.out.println("" + enc.length + "/" + len);
fail("encryption reported incorrect length: " + testName);
}
byte[] mac = encCipher.getMac();
byte[] data = new byte[P.length];
System.arraycopy(enc, 0, data, 0, data.length);
byte[] tail = new byte[enc.length - P.length];
System.arraycopy(enc, P.length, tail, 0, tail.length);
if (!areEqual(C, data))
{
fail("incorrect encrypt in: " + testName);
}
if (!areEqual(T, mac))
{
fail("getMac() returned wrong mac in: " + testName);
}
if (!areEqual(T, tail))
{
fail("stream contained wrong mac in: " + testName);
}
byte[] org.testifyproject.testifyprojectc = new byte[org.testifyproject.testifyprojectcCipher.getOutputSize(enc.length)];
if (SA != null)
{
org.testifyproject.testifyprojectcCipher.processAADBytes(SA, 0, SA.length);
}
len = org.testifyproject.testifyprojectcCipher.processBytes(enc, 0, enc.length, org.testifyproject.testifyprojectc, 0);
len += org.testifyproject.testifyprojectcCipher.doFinal(org.testifyproject.testifyprojectc, len);
mac = org.testifyproject.testifyprojectcCipher.getMac();
data = new byte[C.length];
System.arraycopy(org.testifyproject.testifyprojectc, 0, data, 0, data.length);
if (!areEqual(P, data))
{
fail("incorrect org.testifyproject.testifyprojectcrypt in: " + testName);
}
}
private void randomTests()
throws InvalidCipherTextException
{
SecureRandom srng = new SecureRandom();
srng.setSeed(Times.nanoTime());
randomTests(srng, null);
randomTests(srng, new BasicGCMMultiplier());
randomTests(srng, new Tables8kGCMMultiplier());
randomTests(srng, new Tables64kGCMMultiplier());
}
private void randomTests(SecureRandom srng, GCMMultiplier m)
throws InvalidCipherTextException
{
for (int i = 0; i < 10; ++i)
{
randomTest(srng, m);
}
}
private void randomTest(SecureRandom srng, GCMMultiplier m)
throws InvalidCipherTextException
{
int kLength = 16 + 8 * (Math.abs(srng.nextInt()) % 3);
byte[] K = new byte[kLength];
srng.nextBytes(K);
int pLength = srng.nextInt() >>> 16;
byte[] P = new byte[pLength];
srng.nextBytes(P);
int aLength = srng.nextInt() >>> 24;
byte[] A = new byte[aLength];
srng.nextBytes(A);
int saLength = srng.nextInt() >>> 24;
byte[] SA = new byte[saLength];
srng.nextBytes(SA);
int ivLength = 1 + (srng.nextInt() >>> 24);
byte[] IV = new byte[ivLength];
srng.nextBytes(IV);
AEADParameters parameters = new AEADParameters(new KeyParameter(K), 16 * 8, IV, A);
GCMBlockCipher cipher = initCipher(m, true, parameters);
byte[] C = new byte[cipher.getOutputSize(P.length)];
int predicted = cipher.getUpdateOutputSize(P.length);
int split = nextInt(srng, SA.length + 1);
cipher.processAADBytes(SA, 0, split);
int len = cipher.processBytes(P, 0, P.length, C, 0);
cipher.processAADBytes(SA, split, SA.length - split);
if (predicted != len)
{
fail("encryption reported incorrect update length in randomised test");
}
len += cipher.doFinal(C, len);
if (C.length != len)
{
fail("encryption reported incorrect length in randomised test");
}
byte[] encT = cipher.getMac();
byte[] tail = new byte[C.length - P.length];
System.arraycopy(C, P.length, tail, 0, tail.length);
if (!areEqual(encT, tail))
{
fail("stream contained wrong mac in randomised test");
}
cipher.init(false, parameters);
byte[] org.testifyproject.testifyprojectcP = new byte[cipher.getOutputSize(C.length)];
predicted = cipher.getUpdateOutputSize(C.length);
split = nextInt(srng, SA.length + 1);
cipher.processAADBytes(SA, 0, split);
len = cipher.processBytes(C, 0, C.length, org.testifyproject.testifyprojectcP, 0);
cipher.processAADBytes(SA, split, SA.length - split);
if (predicted != len)
{
fail("org.testifyproject.testifyprojectcryption reported incorrect update length in randomised test");
}
len += cipher.doFinal(org.testifyproject.testifyprojectcP, len);
if (!areEqual(P, org.testifyproject.testifyprojectcP))
{
fail("incorrect org.testifyproject.testifyprojectcrypt in randomised test");
}
byte[] org.testifyproject.testifyprojectcT = cipher.getMac();
if (!areEqual(encT, org.testifyproject.testifyprojectcT))
{
fail("org.testifyproject.testifyprojectcryption produced different mac from encryption");
}
//
// key reuse test
//
cipher.init(false, AEADTestUtil.reuseKey(parameters));
org.testifyproject.testifyprojectcP = new byte[cipher.getOutputSize(C.length)];
split = nextInt(srng, SA.length + 1);
cipher.processAADBytes(SA, 0, split);
len = cipher.processBytes(C, 0, C.length, org.testifyproject.testifyprojectcP, 0);
cipher.processAADBytes(SA, split, SA.length - split);
len += cipher.doFinal(org.testifyproject.testifyprojectcP, len);
if (!areEqual(P, org.testifyproject.testifyprojectcP))
{
fail("incorrect org.testifyproject.testifyprojectcrypt in randomised test");
}
org.testifyproject.testifyprojectcT = cipher.getMac();
if (!areEqual(encT, org.testifyproject.testifyprojectcT))
{
fail("org.testifyproject.testifyprojectcryption produced different mac from encryption");
}
}
private void outputSizeTests()
{
byte[] K = new byte[16];
byte[] A = null;
byte[] IV = new byte[16];
AEADParameters parameters = new AEADParameters(new KeyParameter(K), 16 * 8, IV, A);
GCMBlockCipher cipher = initCipher(null, true, parameters);
if (cipher.getUpdateOutputSize(0) != 0)
{
fail("incorrect getUpdateOutputSize for initial 0 bytes encryption");
}
if (cipher.getOutputSize(0) != 16)
{
fail("incorrect getOutputSize for initial 0 bytes encryption");
}
cipher.init(false, parameters);
if (cipher.getUpdateOutputSize(0) != 0)
{
fail("incorrect getUpdateOutputSize for initial 0 bytes org.testifyproject.testifyprojectcryption");
}
// NOTE: 0 bytes would be truncated data, but we want it to fail in the doFinal, not here
if (cipher.getOutputSize(0) != 0)
{
fail("fragile getOutputSize for initial 0 bytes org.testifyproject.testifyprojectcryption");
}
if (cipher.getOutputSize(16) != 0)
{
fail("incorrect getOutputSize for initial MAC-size bytes org.testifyproject.testifyprojectcryption");
}
}
private static int nextInt(SecureRandom rand, int n)
{
if ((n & -n) == n) // i.e., n is a power of 2
{
return (int)((n * (long)(rand.nextInt() >>> 1)) >> 31);
}
int bits, value;
do
{
bits = rand.nextInt() >>> 1;
value = bits % n;
}
while (bits - value + (n - 1) < 0);
return value;
}
public static void main(String[] args)
{
runTest(new GCMTest());
}
}
