/** Converts the RRSIG/SIG Record to a String */
public String rdataToString() {
StringBuffer sb = new StringBuffer();
if (signature != null) {
sb.append(Type.string(covered));
sb.append(" ");
sb.append(alg);
sb.append(" ");
sb.append(labels);
sb.append(" ");
sb.append(origttl);
sb.append(" ");
if (Options.check("multiline")) sb.append("(\n\t");
sb.append(FormattedTime.format(expire));
sb.append(" ");
sb.append(FormattedTime.format(timeSigned));
sb.append(" ");
sb.append(footprint);
sb.append(" ");
sb.append(signer);
if (Options.check("multiline")) {
sb.append("\n");
sb.append(base64.formatString(signature, 64, "\t", true));
} else {
sb.append(" ");
sb.append(base64.toString(signature));
}
}
return sb.toString();
}
/** Converts a Record into a String representation */
public String toString() {
StringBuffer sb = new StringBuffer();
sb.append(name);
if (sb.length() < 8) sb.append("\t");
if (sb.length() < 16) sb.append("\t");
sb.append("\t");
if (Options.check("BINDTTL")) sb.append(TTL.format(ttl));
else sb.append(ttl);
sb.append("\t");
if (dclass != DClass.IN || !Options.check("noPrintIN")) {
sb.append(DClass.string(dclass));
sb.append("\t");
}
sb.append(Type.string(type));
String rdata = rrToString();
if (!rdata.equals("")) {
sb.append("\t");
sb.append(rdata);
}
return sb.toString();
}
/** Converts rdata to a String */
String rrToString() {
StringBuffer sb = new StringBuffer();
sb.append(certType);
sb.append(" ");
sb.append(keyTag);
sb.append(" ");
sb.append(alg);
if (cert != null) {
if (Options.check("multiline")) {
sb.append(" (\n");
sb.append(Base64.formatString(cert, 64, "\t", true));
} else {
sb.append(" ");
sb.append(Base64.toString(cert));
}
}
return sb.toString();
}
/** Converts a KEY/DNSKEY record into a PublicKey */
static PublicKey parseRecord(int alg, byte[] data) {
DataByteInputStream dbs = new DataByteInputStream(data);
try {
switch (alg) {
case DNSSEC.RSAMD5:
case DNSSEC.RSASHA1:
return parseRSA(dbs);
case DNSSEC.DH:
return parseDH(dbs);
case DNSSEC.DSA:
return parseDSA(dbs);
default:
return null;
}
} catch (IOException e) {
if (Options.check("verboseexceptions")) System.err.println(e);
return null;
}
}
private static final Record getTypedObject(int type) {
if (type < 0 || type > knownRecords.length) return unknownRecord.getObject();
if (knownRecords[type] != null) return knownRecords[type];
/* Construct the class name by putting the type before "Record". */
String s =
Record.class.getPackage().getName() + "." + Type.string(type).replace('-', '_') + "Record";
try {
Class c = Class.forName(s);
Constructor m = c.getDeclaredConstructor(emptyClassArray);
knownRecords[type] = (Record) m.newInstance(emptyObjectArray);
} catch (ClassNotFoundException e) {
/* This is normal; do nothing */
} catch (Exception e) {
if (Options.check("verbose")) System.err.println(e);
}
if (knownRecords[type] == null) knownRecords[type] = unknownRecord.getObject();
return knownRecords[type];
}
/** Converts to a String */
public String toString() {
StringBuffer sb = toStringNoData();
if (key != null || (flags & (FLAG_NOKEY)) == (FLAG_NOKEY)) {
if (!Options.check("nohex")) {
sb.append("0x");
sb.append(Integer.toHexString(flags & 0xFFFF));
} else sb.append(flags & 0xFFFF);
sb.append(" ");
sb.append(proto);
sb.append(" ");
sb.append(alg);
if (key != null) {
sb.append(" (\n");
sb.append(base64.formatString(key, 64, "\t", true));
sb.append(" ; key_tag= ");
sb.append(getFootprint());
}
}
return sb.toString();
}
/**
* Looks up Records in the Cache. This follows CNAMEs and handles negatively cached data.
*
* @param name The name to look up
* @param type The type to look up
* @param minCred The minimum acceptable credibility
* @return A SetResponse object
* @see SetResponse
* @see Credibility
*/
public SetResponse lookupRecords(Name name, short type, byte minCred) {
SetResponse cr = null;
boolean verbose = Options.check("verbosecache");
Object o = lookup(name, type);
if (verbose) logLookup(name, type, "Starting");
if (o == null || o == NXRRSET) {
/*
* The name exists, but the type was not found. Or, the
* name does not exist and no parent does either. Punt.
*/
if (verbose) logLookup(name, type, "no information found");
return SetResponse.ofType(SetResponse.UNKNOWN);
}
Object[] objects;
if (o instanceof Element) objects = new Object[] {o};
else objects = (Object[]) o;
int nelements = 0;
for (int i = 0; i < objects.length; i++) {
Element element = (Element) objects[i];
if (element.expired()) {
if (verbose) {
logLookup(name, type, element.toString());
logLookup(name, type, "expired: ignoring");
}
removeSet(name, type, element);
objects[i] = null;
} else if (element.credibility < minCred) {
if (verbose) {
logLookup(name, type, element.toString());
logLookup(name, type, "not credible: ignoring");
}
objects[i] = null;
} else {
nelements++;
}
}
if (nelements == 0) {
/* We have data, but can't use it. Punt. */
if (verbose) logLookup(name, type, "no useful data found");
return SetResponse.ofType(SetResponse.UNKNOWN);
}
/*
* We have something at the name. It could be the answer,
* a CNAME, DNAME, or NS, or a negative cache entry.
*
* Ignore wildcards, since it's pretty unlikely that any will be
* cached. The occasional extra query is easily balanced by the
* reduced number of lookups.
*/
for (int i = 0; i < objects.length; i++) {
if (objects[i] == null) continue;
Element element = (Element) objects[i];
if (verbose) logLookup(name, type, element.toString());
RRset rrset = null;
if (element instanceof PositiveElement) rrset = ((PositiveElement) element).rrset;
/* Is this a negatively cached entry? */
if (rrset == null) {
/*
* If this is an NXDOMAIN entry, return NXDOMAIN.
*/
if (element.getType() == 0) {
if (verbose) logLookup(name, type, "NXDOMAIN");
return SetResponse.ofType(SetResponse.NXDOMAIN);
}
/*
* If we're not looking for type ANY, return NXRRSET.
* Otherwise ignore this.
*/
if (type != Type.ANY) {
if (verbose) logLookup(name, type, "NXRRSET");
return SetResponse.ofType(SetResponse.NXRRSET);
} else {
if (verbose) logLookup(name, type, "ANY query; " + "ignoring NXRRSET");
continue;
}
}
short rtype = rrset.getType();
Name rname = rrset.getName();
if (name.equals(rname)) {
if (type != Type.CNAME && type != Type.ANY && rtype == Type.CNAME) {
if (verbose) logLookup(name, type, "cname");
return new SetResponse(SetResponse.CNAME, rrset);
} else if (type != Type.NS && type != Type.ANY && rtype == Type.NS) {
if (verbose) logLookup(name, type, "exact delegation");
return new SetResponse(SetResponse.DELEGATION, rrset);
} else {
if (verbose) logLookup(name, type, "exact match");
if (cr == null) cr = new SetResponse(SetResponse.SUCCESSFUL);
cr.addRRset(rrset);
}
} else if (name.subdomain(rname)) {
if (rtype == Type.DNAME) {
if (verbose) logLookup(name, type, "dname");
return new SetResponse(SetResponse.DNAME, rrset);
} else if (rtype == Type.NS) {
if (verbose) logLookup(name, type, "parent delegation");
return new SetResponse(SetResponse.DELEGATION, rrset);
} else {
if (verbose)
logLookup(name, type, "ignoring rrset (" + rname + " " + Type.string(rtype) + ")");
}
} else {
if (verbose)
logLookup(name, type, "ignoring rrset (" + rname + " " + Type.string(rtype) + ")");
}
}
/*
* As far as I can tell, the only legitimate time cr will be null is
* if we queried for ANY and only saw negative responses, but not an
* NXDOMAIN. Return UNKNOWN.
*/
if (cr == null && type == Type.ANY) return SetResponse.ofType(SetResponse.UNKNOWN);
else if (cr == null)
throw new IllegalStateException(
"looking up (" + name + " " + Type.string(type) + "): " + "cr == null.");
return cr;
}
