Class TSIG

src/main/java/core/org/xbill/DNS/TSIG.java:20–661

Transaction signature handling. This class generates and verifies TSIG records on messages, which provide transaction security. @see TSIGRecord @author Brian Wellington

 */

public class TSIG {

/** The domain name representing the HMAC-MD5 algorithm. */
public static final Name HMAC_MD5 =
	Name.fromConstantString("HMAC-MD5.SIG-ALG.REG.INT.");

/** The domain name representing the HMAC-MD5 algorithm (deprecated). */
public static final Name HMAC = HMAC_MD5;

/** The domain name representing the HMAC-SHA1 algorithm. */
public static final Name HMAC_SHA1 = Name.fromConstantString("hmac-sha1.");

/**
 * The domain name representing the HMAC-SHA224 algorithm.
 * Note that SHA224 is not supported by Java out-of-the-box, this requires use
 * of a third party provider like BouncyCastle.org.
 */
public static final Name HMAC_SHA224 = Name.fromConstantString("hmac-sha224.");

/** The domain name representing the HMAC-SHA256 algorithm. */
public static final Name HMAC_SHA256 = Name.fromConstantString("hmac-sha256.");

/** The domain name representing the HMAC-SHA384 algorithm. */
public static final Name HMAC_SHA384 = Name.fromConstantString("hmac-sha384.");

/** The domain name representing the HMAC-SHA512 algorithm. */
public static final Name HMAC_SHA512 = Name.fromConstantString("hmac-sha512.");

private static Map algMap;

static {
	Map out = new HashMap();
	out.put(HMAC_MD5, "HmacMD5");
	out.put(HMAC_SHA1, "HmacSHA1");
	out.put(HMAC_SHA224, "HmacSHA224");
	out.put(HMAC_SHA256, "HmacSHA256");
	out.put(HMAC_SHA384, "HmacSHA384");
	out.put(HMAC_SHA512, "HmacSHA512");
	algMap = Collections.unmodifiableMap(out);
}

public static Name
algorithmToName(String alg)
{
	Iterator it = algMap.entrySet().iterator();
	while (it.hasNext()) {
		Map.Entry entry = (Map.Entry) it.next();
		if (alg.equalsIgnoreCase((String)entry.getValue()))
			return (Name) entry.getKey();
	}
	throw new IllegalArgumentException("Unknown algorithm");
}
public static String
nameToAlgorithm(Name name)
{
	String alg = (String) algMap.get(name);
	if (alg != null)
		return alg;