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package org.spongycastle.crypto.test;
import org.spongycastle.crypto.Digest;
import org.spongycastle.util.Memoable;
import org.spongycastle.util.encoders.Hex;
import org.spongycastle.util.test.SimpleTest;
public abstract class DigestTest
extends SimpleTest
{
private Digest digest;
private String[] input;
private String[] results;
DigestTest(
Digest digest,
String[] input,
String[] results)
{
this.digest = digest;
this.input = input;
this.results = results;
}
public String getName()
{
return digest.getAlgorithmName();
}
public void performTest()
{
byte[] resBuf = new byte[digest.getDigestSize()];
for (int i = 0; i < input.length - 1; i++)
{
byte[] m = toByteArray(input[i]);
vectorTest(digest, i, resBuf, m, Hex.decode(results[i]));
}
byte[] lastV = toByteArray(input[input.length - 1]);
byte[] lastDigest = Hex.decode(results[input.length - 1]);
vectorTest(digest, input.length - 1, resBuf, lastV, Hex.decode(results[input.length - 1]));
//
// clone test
//
digest.update(lastV, 0, lastV.length/2);
// clone the Digest
Digest d = cloneDigest(digest);
digest.update(lastV, lastV.length/2, lastV.length - lastV.length/2);
digest.doFinal(resBuf, 0);
if (!areEqual(lastDigest, resBuf))
{
fail("failing clone vector test", results[results.length - 1], new String(Hex.encode(resBuf)));
}
d.update(lastV, lastV.length/2, lastV.length - lastV.length/2);
d.doFinal(resBuf, 0);
if (!areEqual(lastDigest, resBuf))
{
fail("failing second clone vector test", results[results.length - 1], new String(Hex.encode(resBuf)));
}
//
// memo test
//
Memoable m = (Memoable)digest;
digest.update(lastV, 0, lastV.length/2);
// copy the Digest
Memoable copy1 = m.copy();
Memoable copy2 = copy1.copy();
digest.update(lastV, lastV.length/2, lastV.length - lastV.length/2);
digest.doFinal(resBuf, 0);
if (!areEqual(lastDigest, resBuf))
{
fail("failing memo vector test", results[results.length - 1], new String(Hex.encode(resBuf)));
}
m.reset(copy1);
digest.update(lastV, lastV.length/2, lastV.length - lastV.length/2);
digest.doFinal(resBuf, 0);
if (!areEqual(lastDigest, resBuf))
{
fail("failing memo reset vector test", results[results.length - 1], new String(Hex.encode(resBuf)));
}
Digest md = (Digest)copy2;
md.update(lastV, lastV.length/2, lastV.length - lastV.length/2);
md.doFinal(resBuf, 0);
if (!areEqual(lastDigest, resBuf))
{
fail("failing memo copy vector test", results[results.length - 1], new String(Hex.encode(resBuf)));
}
}
private byte[] toByteArray(String input)
{
byte[] bytes = new byte[input.length()];
for (int i = 0; i != bytes.length; i++)
{
bytes[i] = (byte)input.charAt(i);
}
return bytes;
}
private void vectorTest(
Digest digest,
int count,
byte[] resBuf,
byte[] input,
byte[] expected)
{
digest.update(input, 0, input.length);
digest.doFinal(resBuf, 0);
if (!areEqual(resBuf, expected))
{
fail("Vector " + count + " failed got " + new String(Hex.encode(resBuf)));
}
}
protected abstract Digest cloneDigest(Digest digest);
//
// optional tests
//
protected void millionATest(
String expected)
{
byte[] resBuf = new byte[digest.getDigestSize()];
for (int i = 0; i < 1000000; i++)
{
digest.update((byte)'a');
}
digest.doFinal(resBuf, 0);
if (!areEqual(resBuf, Hex.decode(expected)))
{
fail("Million a's failed", expected, new String(Hex.encode(resBuf)));
}
}
protected void sixtyFourKTest(
String expected)
{
byte[] resBuf = new byte[digest.getDigestSize()];
for (int i = 0; i < 65536; i++)
{
digest.update((byte)(i & 0xff));
}
digest.doFinal(resBuf, 0);
if (!areEqual(resBuf, Hex.decode(expected)))
{
fail("64k test failed", expected, new String(Hex.encode(resBuf)));
}
}
}
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