1 files changed, 157 insertions, 0 deletions
diff --git a/src/org/xbill/DNS/DSRecord.java b/src/org/xbill/DNS/DSRecord.java
new file mode 100644
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--- /dev/null
+++ b/src/org/xbill/DNS/DSRecord.java
@@ -0,0 +1,157 @@
+// Copyright (c) 2002-2004 Brian Wellington (bwelling@xbill.org)
+
+package org.xbill.DNS;
+
+import java.io.*;
+import org.xbill.DNS.utils.*;
+
+/**
+ * DS - contains a Delegation Signer record, which acts as a
+ * placeholder for KEY records in the parent zone.
+ * @see DNSSEC
+ *
+ * @author David Blacka
+ * @author Brian Wellington
+ */
+
+public class DSRecord extends Record {
+
+public static class Digest {
+	private Digest() {}
+
+	/** SHA-1 */
+	public static final int SHA1 = 1;
+
+	/** SHA-256 */
+	public static final int SHA256 = 2;
+
+	/** SHA-384 */
+	public static final int SHA384 = 4;
+}
+
+public static final int SHA1_DIGEST_ID = Digest.SHA1;
+public static final int SHA256_DIGEST_ID = Digest.SHA256;
+public static final int SHA384_DIGEST_ID = Digest.SHA384;
+
+private static final long serialVersionUID = -9001819329700081493L;
+
+private int footprint;
+private int alg;
+private int digestid;
+private byte [] digest;
+
+DSRecord() {}
+
+Record
+getObject() {
+	return new DSRecord();
+}
+
+/**
+ * Creates a DS Record from the given data
+ * @param footprint The original KEY record's footprint (keyid).
+ * @param alg The original key algorithm.
+ * @param digestid The digest id code.
+ * @param digest A hash of the original key.
+ */
+public
+DSRecord(Name name, int dclass, long ttl, int footprint, int alg,
+	 int digestid, byte [] digest)
+{
+	super(name, Type.DS, dclass, ttl);
+	this.footprint = checkU16("footprint", footprint);
+	this.alg = checkU8("alg", alg);
+	this.digestid = checkU8("digestid", digestid);
+	this.digest = digest;
+}
+
+/**
+ * Creates a DS Record from the given data
+ * @param digestid The digest id code.
+ * @param key The key to digest
+ */
+public
+DSRecord(Name name, int dclass, long ttl, int digestid, DNSKEYRecord key)
+{
+	this(name, dclass, ttl, key.getFootprint(), key.getAlgorithm(),
+	     digestid, DNSSEC.generateDSDigest(key, digestid));
+}
+
+void
+rrFromWire(DNSInput in) throws IOException {
+	footprint = in.readU16();
+	alg = in.readU8();
+	digestid = in.readU8();
+	digest = in.readByteArray();
+}
+
+void
+rdataFromString(Tokenizer st, Name origin) throws IOException {
+	footprint = st.getUInt16();
+	alg = st.getUInt8();
+	digestid = st.getUInt8();
+	digest = st.getHex();
+}
+
+/**
+ * Converts rdata to a String
+ */
+String
+rrToString() {
+	StringBuffer sb = new StringBuffer();
+	sb.append(footprint);
+	sb.append(" ");
+	sb.append(alg);
+	sb.append(" ");
+	sb.append(digestid);
+	if (digest != null) {
+		sb.append(" ");
+		sb.append(base16.toString(digest));
+	}
+
+	return sb.toString();
+}
+
+/**
+ * Returns the key's algorithm.
+ */
+public int
+getAlgorithm() {
+	return alg;
+}
+
+/**
+ *  Returns the key's Digest ID.
+ */
+public int
+getDigestID()
+{
+	return digestid;
+}
+  
+/**
+ * Returns the binary hash of the key.
+ */
+public byte []
+getDigest() {
+	return digest;
+}
+
+/**
+ * Returns the key's footprint.
+ */
+public int
+getFootprint() {
+	return footprint;
+}
+
+void
+rrToWire(DNSOutput out, Compression c, boolean canonical) {
+	out.writeU16(footprint);
+	out.writeU8(alg);
+	out.writeU8(digestid);
+	if (digest != null)
+		out.writeByteArray(digest);
+}
+
+}