1package eu.siacs.conversations.crypto.sasl;
 2
 3import com.google.common.hash.HashFunction;
 4import com.google.common.hash.Hashing;
 5
 6import org.bouncycastle.crypto.Digest;
 7import org.bouncycastle.crypto.digests.SHA256Digest;
 8import org.bouncycastle.crypto.macs.HMac;
 9
10import eu.siacs.conversations.entities.Account;
11
12public class ScramSha256 extends ScramMechanism {
13
14    public static final String MECHANISM = "SCRAM-SHA-256";
15
16    public ScramSha256(final Account account) {
17        super(account, ChannelBinding.NONE);
18    }
19
20    @Override
21    protected HashFunction getHMac(final byte[] key) {
22        return (key == null || key.length == 0)
23                ? Hashing.hmacSha256(EMPTY_KEY)
24                : Hashing.hmacSha256(key);
25    }
26
27    @Override
28    protected HashFunction getDigest() {
29        return Hashing.sha256();
30    }
31    @Override
32    public int getPriority() {
33        return 25;
34    }
35
36    @Override
37    public String getMechanism() {
38        return MECHANISM;
39    }
40}