* Provides methods for encoding, decoding, and manipulating sets of AV pairs.
 *
 * @author mbechler
 */
public final class AvPairs {

    private AvPairs() {
    }

    /**
     * Decode a list of AvPairs
     *
     * @param data the encoded AV pairs data
     * @return individual pairs
     * @throws CIFSException if decoding fails
     */

        AvPairs.replace(pairs, newFlags);

        assertEquals(2, pairs.size(), "Should have 2 pairs after replace");
        assertTrue(AvPairs.contains(pairs, AvPair.MsvAvFlags), "Should contain MsvAvFlags");
        assertTrue(AvPairs.contains(pairs, AvPair.MsvAvTimestamp), "Should still contain MsvAvTimestamp");

        AvPair result = AvPairs.get(pairs, AvPair.MsvAvFlags);

            final List<AvPair> avPairs = ntlmClientChallengeInfo != null ? AvPairs.decode(ntlmClientChallengeInfo) : null;

            // if targetInfo has an MsvAvTimestamp
            // client should not send LmChallengeResponse
            final boolean haveTimestamp = AvPairs.contains(avPairs, AvPair.MsvAvTimestamp);
            if (!haveTimestamp) {

     * @param avPairs the AV pairs from the Type 2 message
     * @return the calculated response
     */
    public static byte[] getNTLMv2Response(final byte[] responseKeyNT, final byte[] serverChallenge, final byte[] clientChallenge,
            final long nanos1601, final byte[] avPairs) {
        final int avPairsLength = avPairs != null ? avPairs.length : 0;

        byte[] clientChallenge = hex("0102030405060708");
        long nanos1601 = 0x1122334455667788L;
        byte[] avPairs = hex("A1A2A3A4");

        // Manually build the expected NTLMv2 blob (same as production code)
        int avPairsLength = avPairs.length;
        byte[] blob = new byte[28 + avPairsLength + 4];
        Encdec.enc_uint32le(0x00000101, blob, 0); // Header

import jcifs.CIFSContext;
import jcifs.Configuration;
import jcifs.NameServiceClient;
import jcifs.NetbiosAddress;
import jcifs.ntlmssp.av.AvFlags;
import jcifs.ntlmssp.av.AvPair;
import jcifs.ntlmssp.av.AvPairs;
import jcifs.ntlmssp.av.AvSingleHost;
import jcifs.ntlmssp.av.AvTargetName;
import jcifs.ntlmssp.av.AvTimestamp;

/**
 * Test class for NTLMSSP Type 3 Message functionality
 */
@ExtendWith(MockitoExtension.class)