From 34e74b80d74fc6ddae8f8542063b1184a1e0932e Mon Sep 17 00:00:00 2001
From: Thomas Mueller <thomasmueller@users.noreply.github.com>
Date: Wed, 26 Oct 2011 17:55:12 +0000
Subject: [PATCH] Tests.
---
.../test/org/h2/test/unit/TestSecurity.java | 37 +++++++++++++++----
1 file changed, 30 insertions(+), 7 deletions(-)
diff --git a/h2/src/test/org/h2/test/unit/TestSecurity.java b/h2/src/test/org/h2/test/unit/TestSecurity.java
index 50b69070f..929a9c22b 100644
--- a/h2/src/test/org/h2/test/unit/TestSecurity.java
+++ b/h2/src/test/org/h2/test/unit/TestSecurity.java
@@ -34,7 +34,7 @@ public class TestSecurity extends TestBase {
testConnectWithHash();
testSHA();
testAES();
- testXTEA();
+ testBlockCiphers();
}
private static void testConnectWithHash() throws SQLException {
@@ -90,12 +90,20 @@ public class TestSecurity extends TestBase {
assertEquals(expected, hash);
}
- private static void testXTEA() {
- byte[] test = new byte[4096];
- BlockCipher xtea = CipherFactory.getBlockCipher("XTEA");
- xtea.setKey("abcdefghijklmnop".getBytes());
- for (int i = 0; i < 10; i++) {
- xtea.decrypt(test, 0, test.length);
+ private void testBlockCiphers() {
+ for (String algorithm : new String[] { "AES", "XTEA", "FOG" }) {
+ byte[] test = new byte[4096];
+ BlockCipher cipher = CipherFactory.getBlockCipher(algorithm);
+ cipher.setKey("abcdefghijklmnop".getBytes());
+ for (int i = 0; i < 10; i++) {
+ cipher.encrypt(test, 0, test.length);
+ }
+ assertFalse(isCompressible(test));
+ for (int i = 0; i < 10; i++) {
+ cipher.decrypt(test, 0, test.length);
+ }
+ assertEquals(new byte[test.length], test);
+ assertTrue(isCompressible(test));
}
}
@@ -144,4 +152,19 @@ public class TestSecurity extends TestBase {
}
}
+ private static boolean isCompressible(byte[] data) {
+ int len = data.length;
+ int[] sum = new int[16];
+ for (int i = 0; i < len; i++) {
+ int x = (data[i] & 255) >> 4;
+ sum[x]++;
+ }
+ int r = 0;
+ for (int x : sum) {
+ long v = ((long) x << 32) / len;
+ r += 63 - Long.numberOfLeadingZeros(v + 1);
+ }
+ return len * r < len * 120;
+ }
+
}
--
2.18.1