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Change-Id: I49ce97136c17173c4ae3965c694af6e7bc49897d

1 files changed, 161 insertions, 0 deletions

diff --git a/src/org/xbill/DNS/KEYBase.java b/src/org/xbill/DNS/KEYBase.java
new file mode 100644
index 0000000..59a2c6c
--- /dev/null
+++ b/src/org/xbill/DNS/KEYBase.java
@@ -0,0 +1,161 @@
+// Copyright (c) 1999-2004 Brian Wellington (bwelling@xbill.org)
+
+package org.xbill.DNS;
+
+import java.io.*;
+import java.security.PublicKey;
+
+import org.xbill.DNS.utils.*;
+
+/**
+ * The base class for KEY/DNSKEY records, which have identical formats 
+ *
+ * @author Brian Wellington
+ */
+
+abstract class KEYBase extends Record {
+
+private static final long serialVersionUID = 3469321722693285454L;
+
+protected int flags, proto, alg;
+protected byte [] key;
+protected int footprint = -1;
+protected PublicKey publicKey = null;
+
+protected
+KEYBase() {}
+
+public
+KEYBase(Name name, int type, int dclass, long ttl, int flags, int proto,
+	int alg, byte [] key)
+{
+	super(name, type, dclass, ttl);
+	this.flags = checkU16("flags", flags);
+	this.proto = checkU8("proto", proto);
+	this.alg = checkU8("alg", alg);
+	this.key = key;
+}
+
+void
+rrFromWire(DNSInput in) throws IOException {
+	flags = in.readU16();
+	proto = in.readU8();
+	alg = in.readU8();
+	if (in.remaining() > 0)
+		key = in.readByteArray();
+}
+
+/** Converts the DNSKEY/KEY Record to a String */
+String
+rrToString() {
+	StringBuffer sb = new StringBuffer();
+	sb.append(flags);
+	sb.append(" ");
+	sb.append(proto);
+	sb.append(" ");
+	sb.append(alg);
+	if (key != null) {
+		if (Options.check("multiline")) {
+			sb.append(" (\n");
+			sb.append(base64.formatString(key, 64, "\t", true));
+			sb.append(" ; key_tag = ");
+			sb.append(getFootprint());
+		} else {
+			sb.append(" ");
+			sb.append(base64.toString(key));
+		}
+	}
+	return sb.toString();
+}
+
+/**
+ * Returns the flags describing the key's properties
+ */
+public int
+getFlags() {
+	return flags;
+}
+
+/**
+ * Returns the protocol that the key was created for
+ */
+public int
+getProtocol() {
+	return proto;
+}
+
+/**
+ * Returns the key's algorithm
+ */
+public int
+getAlgorithm() {
+	return alg;
+}
+
+/**
+ * Returns the binary data representing the key
+ */
+public byte []
+getKey() {
+	return key;
+}
+
+/**
+ * Returns the key's footprint (after computing it)
+ */
+public int
+getFootprint() {
+	if (footprint >= 0)
+		return footprint;
+
+	int foot = 0;
+
+	DNSOutput out = new DNSOutput();
+	rrToWire(out, null, false);
+	byte [] rdata = out.toByteArray();
+
+	if (alg == DNSSEC.Algorithm.RSAMD5) {
+		int d1 = rdata[rdata.length - 3] & 0xFF;
+		int d2 = rdata[rdata.length - 2] & 0xFF;
+		foot = (d1 << 8) + d2;
+	}
+	else {
+		int i; 
+		for (i = 0; i < rdata.length - 1; i += 2) {
+			int d1 = rdata[i] & 0xFF;
+			int d2 = rdata[i + 1] & 0xFF;
+			foot += ((d1 << 8) + d2);
+		}
+		if (i < rdata.length) {
+			int d1 = rdata[i] & 0xFF;
+			foot += (d1 << 8);
+		}
+		foot += ((foot >> 16) & 0xFFFF);
+	}
+	footprint = (foot & 0xFFFF);
+	return footprint;
+}
+
+/**
+ * Returns a PublicKey corresponding to the data in this key.
+ * @throws DNSSEC.DNSSECException The key could not be converted.
+ */
+public PublicKey
+getPublicKey() throws DNSSEC.DNSSECException {
+	if (publicKey != null)
+		return publicKey;
+
+	publicKey = DNSSEC.toPublicKey(this);
+	return publicKey;
+}
+
+void
+rrToWire(DNSOutput out, Compression c, boolean canonical) {
+	out.writeU16(flags);
+	out.writeU8(proto);
+	out.writeU8(alg);
+	if (key != null)
+		out.writeByteArray(key);
+}
+
+}