1 files changed, 68 insertions, 0 deletions
diff --git a/core/src/test/java/org/spongycastle/crypto/prng/test/FixedSecureRandomTest.java b/core/src/test/java/org/spongycastle/crypto/prng/test/FixedSecureRandomTest.java
new file mode 100644
index 00000000..b10ad367
--- /dev/null
+++ b/core/src/test/java/org/spongycastle/crypto/prng/test/FixedSecureRandomTest.java
@@ -0,0 +1,68 @@
+package org.spongycastle.crypto.prng.test;
+
+import org.spongycastle.crypto.prng.FixedSecureRandom;
+import org.spongycastle.util.Arrays;
+import org.spongycastle.util.encoders.Hex;
+import org.spongycastle.util.test.SimpleTest;
+
+public class FixedSecureRandomTest
+    extends SimpleTest
+{
+    byte[]  base = Hex.decode("deadbeefdeadbeef");
+    byte[]  r1 = Hex.decode("cafebabecafebabe");
+    byte[]  r2 = Hex.decode("ffffffffcafebabedeadbeef");
+
+    public String getName()
+    {
+        return "FixedSecureRandom";
+    }
+
+    public void performTest()
+        throws Exception
+    {
+        FixedSecureRandom fixed = new FixedSecureRandom(base);
+        byte[]       buf = new byte[8];
+
+        fixed.nextBytes(buf);
+
+        if (!Arrays.areEqual(buf, base))
+        {
+            fail("wrong data returned");
+        }
+
+        fixed = new FixedSecureRandom(base);
+
+        byte[] seed = fixed.generateSeed(8);
+
+        if (!Arrays.areEqual(seed, base))
+        {
+            fail("wrong seed data returned");
+        }
+
+        if (!fixed.isExhausted())
+        {
+            fail("not exhausted");
+        }
+
+        fixed = new FixedSecureRandom(new byte[][] { r1, r2 });
+
+        seed = fixed.generateSeed(12);
+
+        if (!Arrays.areEqual(seed, Hex.decode("cafebabecafebabeffffffff")))
+        {
+            fail("wrong seed data returned - composite");
+        }
+
+        fixed.nextBytes(buf);
+
+        if (!Arrays.areEqual(buf, Hex.decode("cafebabedeadbeef")))
+        {
+            fail("wrong data returned");
+        }
+    }
+
+    public static void main(String[] args)
+    {
+        runTest(new FixedSecureRandomTest());
+    }
+}