Shuyi Chen | d7955ce | 2013-05-22 14:51:55 -0700 | [diff] [blame] | 1 | // Copyright (c) 1999-2004 Brian Wellington (bwelling@xbill.org) |
| 2 | |
| 3 | package org.xbill.DNS; |
| 4 | |
| 5 | import java.io.*; |
| 6 | import java.util.*; |
| 7 | import org.xbill.DNS.utils.*; |
| 8 | |
| 9 | /** |
| 10 | * The base class for SIG/RRSIG records, which have identical formats |
| 11 | * |
| 12 | * @author Brian Wellington |
| 13 | */ |
| 14 | |
| 15 | abstract class SIGBase extends Record { |
| 16 | |
| 17 | private static final long serialVersionUID = -3738444391533812369L; |
| 18 | |
| 19 | protected int covered; |
| 20 | protected int alg, labels; |
| 21 | protected long origttl; |
| 22 | protected Date expire, timeSigned; |
| 23 | protected int footprint; |
| 24 | protected Name signer; |
| 25 | protected byte [] signature; |
| 26 | |
| 27 | protected |
| 28 | SIGBase() {} |
| 29 | |
| 30 | public |
| 31 | SIGBase(Name name, int type, int dclass, long ttl, int covered, int alg, |
| 32 | long origttl, Date expire, Date timeSigned, int footprint, Name signer, |
| 33 | byte [] signature) |
| 34 | { |
| 35 | super(name, type, dclass, ttl); |
| 36 | Type.check(covered); |
| 37 | TTL.check(origttl); |
| 38 | this.covered = covered; |
| 39 | this.alg = checkU8("alg", alg); |
| 40 | this.labels = name.labels() - 1; |
| 41 | if (name.isWild()) |
| 42 | this.labels--; |
| 43 | this.origttl = origttl; |
| 44 | this.expire = expire; |
| 45 | this.timeSigned = timeSigned; |
| 46 | this.footprint = checkU16("footprint", footprint); |
| 47 | this.signer = checkName("signer", signer); |
| 48 | this.signature = signature; |
| 49 | } |
| 50 | |
| 51 | void |
| 52 | rrFromWire(DNSInput in) throws IOException { |
| 53 | covered = in.readU16(); |
| 54 | alg = in.readU8(); |
| 55 | labels = in.readU8(); |
| 56 | origttl = in.readU32(); |
| 57 | expire = new Date(1000 * in.readU32()); |
| 58 | timeSigned = new Date(1000 * in.readU32()); |
| 59 | footprint = in.readU16(); |
| 60 | signer = new Name(in); |
| 61 | signature = in.readByteArray(); |
| 62 | } |
| 63 | |
| 64 | void |
| 65 | rdataFromString(Tokenizer st, Name origin) throws IOException { |
| 66 | String typeString = st.getString(); |
| 67 | covered = Type.value(typeString); |
| 68 | if (covered < 0) |
| 69 | throw st.exception("Invalid type: " + typeString); |
| 70 | String algString = st.getString(); |
| 71 | alg = DNSSEC.Algorithm.value(algString); |
| 72 | if (alg < 0) |
| 73 | throw st.exception("Invalid algorithm: " + algString); |
| 74 | labels = st.getUInt8(); |
| 75 | origttl = st.getTTL(); |
| 76 | expire = FormattedTime.parse(st.getString()); |
| 77 | timeSigned = FormattedTime.parse(st.getString()); |
| 78 | footprint = st.getUInt16(); |
| 79 | signer = st.getName(origin); |
| 80 | signature = st.getBase64(); |
| 81 | } |
| 82 | |
| 83 | /** Converts the RRSIG/SIG Record to a String */ |
| 84 | String |
| 85 | rrToString() { |
| 86 | StringBuffer sb = new StringBuffer(); |
| 87 | sb.append (Type.string(covered)); |
| 88 | sb.append (" "); |
| 89 | sb.append (alg); |
| 90 | sb.append (" "); |
| 91 | sb.append (labels); |
| 92 | sb.append (" "); |
| 93 | sb.append (origttl); |
| 94 | sb.append (" "); |
| 95 | if (Options.check("multiline")) |
| 96 | sb.append ("(\n\t"); |
| 97 | sb.append (FormattedTime.format(expire)); |
| 98 | sb.append (" "); |
| 99 | sb.append (FormattedTime.format(timeSigned)); |
| 100 | sb.append (" "); |
| 101 | sb.append (footprint); |
| 102 | sb.append (" "); |
| 103 | sb.append (signer); |
| 104 | if (Options.check("multiline")) { |
| 105 | sb.append("\n"); |
| 106 | sb.append(base64.formatString(signature, 64, "\t", |
| 107 | true)); |
| 108 | } else { |
| 109 | sb.append (" "); |
| 110 | sb.append(base64.toString(signature)); |
| 111 | } |
| 112 | return sb.toString(); |
| 113 | } |
| 114 | |
| 115 | /** Returns the RRset type covered by this signature */ |
| 116 | public int |
| 117 | getTypeCovered() { |
| 118 | return covered; |
| 119 | } |
| 120 | |
| 121 | /** |
| 122 | * Returns the cryptographic algorithm of the key that generated the signature |
| 123 | */ |
| 124 | public int |
| 125 | getAlgorithm() { |
| 126 | return alg; |
| 127 | } |
| 128 | |
| 129 | /** |
| 130 | * Returns the number of labels in the signed domain name. This may be |
| 131 | * different than the record's domain name if the record is a wildcard |
| 132 | * record. |
| 133 | */ |
| 134 | public int |
| 135 | getLabels() { |
| 136 | return labels; |
| 137 | } |
| 138 | |
| 139 | /** Returns the original TTL of the RRset */ |
| 140 | public long |
| 141 | getOrigTTL() { |
| 142 | return origttl; |
| 143 | } |
| 144 | |
| 145 | /** Returns the time at which the signature expires */ |
| 146 | public Date |
| 147 | getExpire() { |
| 148 | return expire; |
| 149 | } |
| 150 | |
| 151 | /** Returns the time at which this signature was generated */ |
| 152 | public Date |
| 153 | getTimeSigned() { |
| 154 | return timeSigned; |
| 155 | } |
| 156 | |
| 157 | /** Returns The footprint/key id of the signing key. */ |
| 158 | public int |
| 159 | getFootprint() { |
| 160 | return footprint; |
| 161 | } |
| 162 | |
| 163 | /** Returns the owner of the signing key */ |
| 164 | public Name |
| 165 | getSigner() { |
| 166 | return signer; |
| 167 | } |
| 168 | |
| 169 | /** Returns the binary data representing the signature */ |
| 170 | public byte [] |
| 171 | getSignature() { |
| 172 | return signature; |
| 173 | } |
| 174 | |
| 175 | void |
| 176 | setSignature(byte [] signature) { |
| 177 | this.signature = signature; |
| 178 | } |
| 179 | |
| 180 | void |
| 181 | rrToWire(DNSOutput out, Compression c, boolean canonical) { |
| 182 | out.writeU16(covered); |
| 183 | out.writeU8(alg); |
| 184 | out.writeU8(labels); |
| 185 | out.writeU32(origttl); |
| 186 | out.writeU32(expire.getTime() / 1000); |
| 187 | out.writeU32(timeSigned.getTime() / 1000); |
| 188 | out.writeU16(footprint); |
| 189 | signer.toWire(out, null, canonical); |
| 190 | out.writeByteArray(signature); |
| 191 | } |
| 192 | |
| 193 | } |