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*
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* 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
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*
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* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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/*
* @test
* @bug 8026943 8027575
* @summary Verify that same buffer can be used as input and output when
* using Cipher objects.
* @author Valerie Peng
*/
import java.security.*;
import java.security.spec.*;
import java.util.Arrays;
import javax.crypto.*;
import javax.crypto.spec.*;
public class TestCopySafe {
private static boolean DEBUG = false;
private static int INPUT_LENGTH = 160; // must be multiple of block size
private static byte[] PT = new byte[INPUT_LENGTH];
private static SecretKey KEY = new SecretKeySpec(new byte[16], "AES");
private static byte[] IV = new byte[16];
private static int[] OFFSETS = { 1, 8, 9, 16, 17, 32, 33 };
private static final String[] MODES = {
"ECB", "CBC", "PCBC", "CTR", "CTS",
"CFB", "CFB8", "CFB16", "CFB24", "CFB32", "CFB40",
"CFB48", "CFB56", "CFB64",
"OFB", "OFB8", "OFB16", "OFB24", "OFB32", "OFB40",
"OFB48", "OFB56", "OFB64",
"GCM"
};
public static void main(String[] argv) throws Exception {
Provider p = Security.getProvider("SunJCE");
AlgorithmParameterSpec params = null;
boolean result = true;
for (String mode : MODES) {
String transformation = "AES/" + mode + "/NoPadding";
boolean isGCM = (mode == "GCM");
if (isGCM) {
params = new GCMParameterSpec(128, IV);
} else if (mode != "ECB") {
params = new IvParameterSpec(IV);
}
Cipher c = Cipher.getInstance(transformation, p);
System.out.println("Testing " + transformation + ":");
for (int offset : OFFSETS) {
System.out.print("=> offset " + offset + ": ");
try {
test(c, params, offset, isGCM);
System.out.println("Passed");
} catch(Exception ex) {
ex.printStackTrace();
result = false;
continue;
}
}
}
if (!result) {
throw new Exception("One or more test failed");
}
}
private static void test(Cipher c, AlgorithmParameterSpec params,
int offset, boolean isGCM) throws Exception {
// Test encryption first
if (isGCM) {
// re-init with only key value first to bypass the
// Key+IV-uniqueness check for GCM encryption
c.init(Cipher.ENCRYPT_MODE, KEY);
}
c.init(Cipher.ENCRYPT_MODE, KEY, params);
byte[] answer = c.doFinal(PT);
byte[] pt2 = Arrays.copyOf(PT, answer.length + offset);
// #1: outOfs = inOfs = 0
if (isGCM) {
c.init(Cipher.ENCRYPT_MODE, KEY);
c.init(Cipher.ENCRYPT_MODE, KEY, params);
}
c.doFinal(pt2, 0, PT.length, pt2, 0);
if (!isTwoArraysEqual(pt2, 0, answer, 0, answer.length)) {
throw new Exception("Enc#1 diff check failed!");
} else if (DEBUG) {
System.out.println("Enc#1 diff check passed");
}
// #2: inOfs = 0, outOfs = offset
System.arraycopy(PT, 0, pt2, 0, PT.length);
if (isGCM) {
c.init(Cipher.ENCRYPT_MODE, KEY);
c.init(Cipher.ENCRYPT_MODE, KEY, params);
}
c.doFinal(pt2, 0, PT.length, pt2, offset);
if (!isTwoArraysEqual(pt2, offset, answer, 0, answer.length)) {
throw new Exception("Enc#2 diff check failed");
} else if (DEBUG) {
System.out.println("Enc#2 diff check passed");
}
// #3: inOfs = offset, outOfs = 0
System.arraycopy(PT, 0, pt2, offset, PT.length);
if (isGCM) {
c.init(Cipher.ENCRYPT_MODE, KEY);
c.init(Cipher.ENCRYPT_MODE, KEY, params);
}
c.doFinal(pt2, offset, PT.length, pt2, 0);
if (!isTwoArraysEqual(pt2, 0, answer, 0, answer.length)) {
throw new Exception("Enc#3 diff check failed");
} else if (DEBUG) {
System.out.println("Enc#3 diff check passed");
}
// Test decryption now, we should get back PT as a result
c.init(Cipher.DECRYPT_MODE, KEY, params);
pt2 = Arrays.copyOf(answer, answer.length + offset);
// #1: outOfs = inOfs = 0
c.doFinal(pt2, 0, answer.length, pt2, 0);
if (!isTwoArraysEqual(pt2, 0, PT, 0, PT.length)) {
throw new Exception("Dec#1 diff check failed!");
} else if (DEBUG) {
System.out.println("Dec#1 diff check passed");
}
// #2: inOfs = 0, outOfs = offset
System.arraycopy(answer, 0, pt2, 0, answer.length);
c.doFinal(pt2, 0, answer.length, pt2, offset);
if (!isTwoArraysEqual(pt2, offset, PT, 0, PT.length)) {
throw new Exception("Dec#2 diff check failed");
} else if (DEBUG) {
System.out.println("Dec#2 diff check passed");
}
// #3: inOfs = offset, outOfs = 0
System.arraycopy(answer, 0, pt2, offset, answer.length);
c.doFinal(pt2, offset, answer.length, pt2, 0);
if (!isTwoArraysEqual(pt2, 0, PT, 0, PT.length)) {
throw new Exception("Dec#3 diff check failed");
} else if (DEBUG) {
System.out.println("Dec#3 diff check passed");
}
}
private static boolean isTwoArraysEqual(byte[] a, int aOff, byte[] b, int bOff,
int len) {
for (int i = 0; i < len; i++) {
if (a[aOff + i] != b[bOff + i]) {
return false;
}
}
return true;
}
}