Message(DNSInput in) throws IOException {
this(new Header(in));
boolean isUpdate = (header.getOpcode() == Opcode.UPDATE);
boolean truncated = header.getFlag(Flags.TC);
try {
for (int i = 0; i < 4; i++) {
int count = header.getCount(i);
if (count > 0) sections[i] = new ArrayList(count);
for (int j = 0; j < count; j++) {
int pos = in.current();
Record rec = Record.fromWire(in, i, isUpdate);
sections[i].add(rec);
if (i == Section.ADDITIONAL) {
if (rec.getType() == Type.TSIG) tsigstart = pos;
if (rec.getType() == Type.SIG) {
SIGRecord sig = (SIGRecord) rec;
if (sig.getTypeCovered() == 0) sig0start = pos;
}
}
}
}
} catch (WireParseException e) {
if (!truncated) throw e;
}
size = in.current();
}
Record rdataFromString(Name name, short dclass, int ttl, MyStringTokenizer st, Name origin)
throws TextParseException {
SIGRecord rec = new SIGRecord(name, dclass, ttl);
rec.covered = Type.value(st.nextToken());
rec.alg = Byte.parseByte(st.nextToken());
rec.labels = Byte.parseByte(st.nextToken());
rec.origttl = TTL.parseTTL(st.nextToken());
rec.expire = parseDate(st.nextToken());
rec.timeSigned = parseDate(st.nextToken());
rec.footprint = (short) Integer.parseInt(st.nextToken());
rec.signer = Name.fromString(st.nextToken(), origin);
if (st.hasMoreTokens()) rec.signature = base64.fromString(st.remainingTokens());
return rec;
}
private static void digestSIG(DataByteOutputStream out, SIGRecord sig) {
out.writeShort(sig.getTypeCovered());
out.writeByte(sig.getAlgorithm());
out.writeByte(sig.getLabels());
out.writeUnsignedInt(sig.getOrigTTL());
out.writeInt((int) (sig.getExpire().getTime() / 1000));
out.writeInt((int) (sig.getTimeSigned().getTime() / 1000));
out.writeShort(sig.getFootprint());
sig.getSigner().toWireCanonical(out);
}
Record rrFromWire(
Name name, short type, short dclass, int ttl, int length, DataByteInputStream in)
throws IOException {
SIGRecord rec = new SIGRecord(name, dclass, ttl);
if (in == null) return rec;
int start = in.getPos();
rec.covered = in.readShort();
rec.alg = in.readByte();
rec.labels = in.readByte();
rec.origttl = in.readInt();
rec.expire = new Date(1000 * (long) in.readInt());
rec.timeSigned = new Date(1000 * (long) in.readInt());
rec.footprint = in.readShort();
rec.signer = new Name(in);
rec.signature = new byte[length - (in.getPos() - start)];
in.read(rec.signature);
return rec;
}
/**
* Creates an array containing fields of the SIG record and the RRsets to be signed/verified.
*
* @param sig The SIG record used to sign/verify the rrset.
* @param rrset The data to be signed/verified.
* @return The data to be cryptographically signed or verified.
*/
public static byte[] digestRRset(SIGRecord sig, RRset rrset) {
DataByteOutputStream out = new DataByteOutputStream();
digestSIG(out, sig);
int size = rrset.size();
byte[][] records = new byte[size][];
Iterator it = rrset.rrs();
Name name = rrset.getName();
Name wild = null;
if (name.labels() > sig.getLabels()) wild = name.wild(name.labels() - sig.getLabels());
while (it.hasNext()) {
Record rec = (Record) it.next();
if (wild != null) rec = rec.withName(wild);
records[--size] = rec.toWireCanonical();
}
Arrays.sort(records);
for (int i = 0; i < records.length; i++) out.writeArray(records[i]);
return out.toByteArray();
}