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      1 // Copyright (c) 2004 Brian Wellington (bwelling (at) xbill.org)
      2 
      3 package org.xbill.DNS;
      4 
      5 import java.io.*;
      6 import org.xbill.DNS.utils.*;
      7 
      8 /**
      9  * SSH Fingerprint - stores the fingerprint of an SSH host key.
     10  *
     11  * @author Brian Wellington
     12  */
     13 
     14 public class SSHFPRecord extends Record {
     15 
     16 private static final long serialVersionUID = -8104701402654687025L;
     17 
     18 public static class Algorithm {
     19 	private Algorithm() {}
     20 
     21 	public static final int RSA = 1;
     22 	public static final int DSS = 2;
     23 }
     24 
     25 public static class Digest {
     26 	private Digest() {}
     27 
     28 	public static final int SHA1 = 1;
     29 }
     30 
     31 private int alg;
     32 private int digestType;
     33 private byte [] fingerprint;
     34 
     35 SSHFPRecord() {}
     36 
     37 Record
     38 getObject() {
     39 	return new SSHFPRecord();
     40 }
     41 
     42 /**
     43  * Creates an SSHFP Record from the given data.
     44  * @param alg The public key's algorithm.
     45  * @param digestType The public key's digest type.
     46  * @param fingerprint The public key's fingerprint.
     47  */
     48 public
     49 SSHFPRecord(Name name, int dclass, long ttl, int alg, int digestType,
     50 	    byte [] fingerprint)
     51 {
     52 	super(name, Type.SSHFP, dclass, ttl);
     53 	this.alg = checkU8("alg", alg);
     54 	this.digestType = checkU8("digestType", digestType);
     55 	this.fingerprint = fingerprint;
     56 }
     57 
     58 void
     59 rrFromWire(DNSInput in) throws IOException {
     60 	alg = in.readU8();
     61 	digestType = in.readU8();
     62 	fingerprint = in.readByteArray();
     63 }
     64 
     65 void
     66 rdataFromString(Tokenizer st, Name origin) throws IOException {
     67 	alg = st.getUInt8();
     68 	digestType = st.getUInt8();
     69 	fingerprint = st.getHex(true);
     70 }
     71 
     72 String
     73 rrToString() {
     74 	StringBuffer sb = new StringBuffer();
     75 	sb.append(alg);
     76 	sb.append(" ");
     77 	sb.append(digestType);
     78 	sb.append(" ");
     79 	sb.append(base16.toString(fingerprint));
     80 	return sb.toString();
     81 }
     82 
     83 /** Returns the public key's algorithm. */
     84 public int
     85 getAlgorithm() {
     86 	return alg;
     87 }
     88 
     89 /** Returns the public key's digest type. */
     90 public int
     91 getDigestType() {
     92 	return digestType;
     93 }
     94 
     95 /** Returns the fingerprint */
     96 public byte []
     97 getFingerPrint() {
     98 	return fingerprint;
     99 }
    100 
    101 void
    102 rrToWire(DNSOutput out, Compression c, boolean canonical) {
    103 	out.writeU8(alg);
    104 	out.writeU8(digestType);
    105 	out.writeByteArray(fingerprint);
    106 }
    107 
    108 }
    109