1435 lines
46 KiB
JavaScript
1435 lines
46 KiB
JavaScript
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"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.decode = exports.cname = exports.caa = exports.answer = exports.aaaa = exports.a = exports.TRUNCATED_RESPONSE = exports.RECURSION_DESIRED = exports.RECURSION_AVAILABLE = exports.DNSSEC_OK = exports.CHECKING_DISABLED = exports.AUTHORITATIVE_ANSWER = exports.AUTHENTIC_DATA = void 0;
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exports.decodeList = decodeList;
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exports.ds = exports.dnskey = exports.dname = void 0;
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exports.enc = renc;
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exports.encode = void 0;
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exports.encodeList = encodeList;
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exports.encodingLength = void 0;
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exports.encodingLengthList = encodingLengthList;
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exports.sshfp = exports.srv = exports.soa = exports.rrsig = exports.rp = exports.response = exports.question = exports.query = exports.ptr = exports.packet = exports.option = exports.opt = exports.null = exports.nsec3 = exports.nsec = exports.ns = exports.name = exports.mx = exports.hinfo = void 0;
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exports.streamDecode = streamDecode;
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exports.streamEncode = streamEncode;
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exports.unknown = exports.txt = void 0;
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var ip = _interopRequireWildcard(require("@leichtgewicht/ip-codec"), true);
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var types = _interopRequireWildcard(require("./types.js"), true);
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var rcodes = _interopRequireWildcard(require("./rcodes.js"), true);
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var opcodes = _interopRequireWildcard(require("./opcodes.js"), true);
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var classes = _interopRequireWildcard(require("./classes.js"), true);
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var optioncodes = _interopRequireWildcard(require("./optioncodes.js"), true);
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var b = _interopRequireWildcard(require("./buffer_utils.js"), true);
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var _utf8Codec = require("utf8-codec");
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function _getRequireWildcardCache(nodeInterop) { if (typeof WeakMap !== "function") return null; var cacheBabelInterop = new WeakMap(); var cacheNodeInterop = new WeakMap(); return (_getRequireWildcardCache = function (nodeInterop) { return nodeInterop ? cacheNodeInterop : cacheBabelInterop; })(nodeInterop); }
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function _interopRequireWildcard(obj, nodeInterop) { if (!nodeInterop && obj && obj.__esModule) { return obj; } if (obj === null || typeof obj !== "object" && typeof obj !== "function") { return { default: obj }; } var cache = _getRequireWildcardCache(nodeInterop); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (key !== "default" && Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj.default = obj; if (cache) { cache.set(obj, newObj); } return newObj; }
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const QUERY_FLAG = 0;
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const RESPONSE_FLAG = 1 << 15;
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const FLUSH_MASK = 1 << 15;
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const NOT_FLUSH_MASK = ~FLUSH_MASK;
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const QU_MASK = 1 << 15;
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const NOT_QU_MASK = ~QU_MASK;
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function codec({
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bytes = 0,
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encode,
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decode,
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encodingLength
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}) {
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encode.bytes = bytes;
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decode.bytes = bytes;
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return {
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encode,
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decode,
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encodingLength: encodingLength || (() => bytes)
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};
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}
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const name = codec({
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encode(str, buf, offset) {
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if (!buf) buf = new Uint8Array(name.encodingLength(str));
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if (!offset) offset = 0;
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const oldOffset = offset;
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// strip leading and trailing .
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const n = str.replace(/^\.|\.$/gm, '');
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if (n.length) {
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const list = n.split('.');
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for (let i = 0; i < list.length; i++) {
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const len = b.write(buf, list[i], offset + 1);
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buf[offset] = len;
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offset += len + 1;
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}
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}
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buf[offset++] = 0;
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name.encode.bytes = offset - oldOffset;
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return buf;
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},
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decode(buf, offset) {
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if (!offset) offset = 0;
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const list = [];
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let oldOffset = offset;
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let totalLength = 0;
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let consumedBytes = 0;
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let jumped = false;
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while (true) {
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if (offset >= buf.length) {
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throw new Error('Cannot decode name (buffer overflow)');
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}
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const len = buf[offset++];
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consumedBytes += jumped ? 0 : 1;
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if (len === 0) {
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break;
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} else if ((len & 0xc0) === 0) {
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if (offset + len > buf.length) {
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throw new Error('Cannot decode name (buffer overflow)');
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}
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totalLength += len + 1;
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if (totalLength > 254) {
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throw new Error('Cannot decode name (name too long)');
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}
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list.push((0, _utf8Codec.decode)(buf, offset, offset + len));
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offset += len;
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consumedBytes += jumped ? 0 : len;
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} else if ((len & 0xc0) === 0xc0) {
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if (offset + 1 > buf.length) {
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throw new Error('Cannot decode name (buffer overflow)');
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}
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const jumpOffset = b.readUInt16BE(buf, offset - 1) - 0xc000;
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if (jumpOffset >= oldOffset) {
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// Allow only pointers to prior data. RFC 1035, section 4.1.4 states:
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// "[...] an entire domain name or a list of labels at the end of a domain name
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// is replaced with a pointer to a prior occurance (sic) of the same name."
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throw new Error('Cannot decode name (bad pointer)');
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}
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offset = jumpOffset;
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oldOffset = jumpOffset;
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consumedBytes += jumped ? 0 : 1;
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jumped = true;
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} else {
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throw new Error('Cannot decode name (bad label)');
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}
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}
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name.decode.bytes = consumedBytes;
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return list.length === 0 ? '.' : list.join('.');
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},
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encodingLength(n) {
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if (n === '.' || n === '..') return 1;
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return b.bytelength(n.replace(/^\.|\.$/gm, '')) + 2;
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}
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});
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exports.name = name;
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const string = codec({
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encode(s, buf, offset) {
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if (!buf) buf = new Uint8Array(string.encodingLength(s));
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if (!offset) offset = 0;
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const len = b.write(buf, s, offset + 1);
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buf[offset] = len;
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string.encode.bytes = len + 1;
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return buf;
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},
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decode(buf, offset) {
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if (!offset) offset = 0;
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const len = buf[offset];
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const s = (0, _utf8Codec.decode)(buf, offset + 1, offset + 1 + len);
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string.decode.bytes = len + 1;
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return s;
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},
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encodingLength(s) {
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return b.bytelength(s) + 1;
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}
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});
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const header = codec({
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bytes: 12,
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encode(h, buf, offset) {
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if (!buf) buf = new Uint8Array(header.encodingLength(h));
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if (!offset) offset = 0;
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const flags = (h.flags || 0) & 32767;
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const type = h.type === 'response' ? RESPONSE_FLAG : QUERY_FLAG;
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b.writeUInt16BE(buf, h.id || 0, offset);
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b.writeUInt16BE(buf, flags | type, offset + 2);
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b.writeUInt16BE(buf, h.questions.length, offset + 4);
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b.writeUInt16BE(buf, h.answers.length, offset + 6);
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b.writeUInt16BE(buf, h.authorities.length, offset + 8);
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b.writeUInt16BE(buf, h.additionals.length, offset + 10);
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return buf;
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},
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decode(buf, offset) {
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if (!offset) offset = 0;
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if (buf.length < 12) throw new Error('Header must be 12 bytes');
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const flags = b.readUInt16BE(buf, offset + 2);
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return {
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id: b.readUInt16BE(buf, offset),
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type: flags & RESPONSE_FLAG ? 'response' : 'query',
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flags: flags & 32767,
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flag_qr: (flags >> 15 & 0x1) === 1,
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opcode: opcodes.toString(flags >> 11 & 0xf),
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flag_aa: (flags >> 10 & 0x1) === 1,
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flag_tc: (flags >> 9 & 0x1) === 1,
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flag_rd: (flags >> 8 & 0x1) === 1,
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flag_ra: (flags >> 7 & 0x1) === 1,
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flag_z: (flags >> 6 & 0x1) === 1,
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flag_ad: (flags >> 5 & 0x1) === 1,
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flag_cd: (flags >> 4 & 0x1) === 1,
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rcode: rcodes.toString(flags & 0xf),
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questions: new Array(b.readUInt16BE(buf, offset + 4)),
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answers: new Array(b.readUInt16BE(buf, offset + 6)),
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authorities: new Array(b.readUInt16BE(buf, offset + 8)),
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additionals: new Array(b.readUInt16BE(buf, offset + 10))
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};
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},
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encodingLength() {
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return 12;
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}
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});
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const runknown = codec({
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encode(data, buf, offset) {
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if (!buf) buf = new Uint8Array(runknown.encodingLength(data));
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if (!offset) offset = 0;
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const dLen = data.length;
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b.writeUInt16BE(buf, dLen, offset);
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b.copy(data, buf, offset + 2, 0, dLen);
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runknown.encode.bytes = dLen + 2;
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return buf;
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},
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decode(buf, offset) {
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if (!offset) offset = 0;
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const len = b.readUInt16BE(buf, offset);
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const data = buf.slice(offset + 2, offset + 2 + len);
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runknown.decode.bytes = len + 2;
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return data;
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},
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encodingLength(data) {
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return data.length + 2;
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}
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});
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exports.unknown = runknown;
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const rns = codec({
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encode(data, buf, offset) {
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if (!buf) buf = new Uint8Array(rns.encodingLength(data));
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if (!offset) offset = 0;
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name.encode(data, buf, offset + 2);
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b.writeUInt16BE(buf, name.encode.bytes, offset);
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rns.encode.bytes = name.encode.bytes + 2;
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return buf;
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},
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decode(buf, offset) {
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if (!offset) offset = 0;
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const len = b.readUInt16BE(buf, offset);
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const dd = name.decode(buf, offset + 2);
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rns.decode.bytes = len + 2;
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return dd;
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},
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encodingLength(data) {
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return name.encodingLength(data) + 2;
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}
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});
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exports.ns = rns;
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const rsoa = codec({
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encode(data, buf, offset) {
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if (!buf) buf = new Uint8Array(rsoa.encodingLength(data));
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if (!offset) offset = 0;
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const oldOffset = offset;
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offset += 2;
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name.encode(data.mname, buf, offset);
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offset += name.encode.bytes;
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name.encode(data.rname, buf, offset);
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offset += name.encode.bytes;
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b.writeUInt32BE(buf, data.serial || 0, offset);
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offset += 4;
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b.writeUInt32BE(buf, data.refresh || 0, offset);
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offset += 4;
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b.writeUInt32BE(buf, data.retry || 0, offset);
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offset += 4;
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b.writeUInt32BE(buf, data.expire || 0, offset);
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offset += 4;
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b.writeUInt32BE(buf, data.minimum || 0, offset);
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offset += 4;
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b.writeUInt16BE(buf, offset - oldOffset - 2, oldOffset);
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rsoa.encode.bytes = offset - oldOffset;
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return buf;
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},
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decode(buf, offset) {
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if (!offset) offset = 0;
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const oldOffset = offset;
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const data = {};
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offset += 2;
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data.mname = name.decode(buf, offset);
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offset += name.decode.bytes;
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data.rname = name.decode(buf, offset);
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offset += name.decode.bytes;
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data.serial = b.readUInt32BE(buf, offset);
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offset += 4;
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data.refresh = b.readUInt32BE(buf, offset);
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offset += 4;
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data.retry = b.readUInt32BE(buf, offset);
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offset += 4;
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data.expire = b.readUInt32BE(buf, offset);
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offset += 4;
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data.minimum = b.readUInt32BE(buf, offset);
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offset += 4;
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rsoa.decode.bytes = offset - oldOffset;
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return data;
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},
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encodingLength(data) {
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return 22 + name.encodingLength(data.mname) + name.encodingLength(data.rname);
|
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}
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});
|
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exports.soa = rsoa;
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const rtxt = codec({
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encode(data, buf, offset) {
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if (!Array.isArray(data)) data = [data];
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for (let i = 0; i < data.length; i++) {
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if (typeof data[i] === 'string') {
|
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data[i] = b.from(data[i]);
|
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}
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if (!b.isU8Arr(data[i])) {
|
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throw new Error('Must be a Buffer');
|
||
|
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}
|
||
|
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}
|
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if (!buf) buf = new Uint8Array(rtxt.encodingLength(data));
|
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if (!offset) offset = 0;
|
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const oldOffset = offset;
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offset += 2;
|
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data.forEach(function (d) {
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buf[offset++] = d.length;
|
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b.copy(d, buf, offset, 0, d.length);
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offset += d.length;
|
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});
|
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b.writeUInt16BE(buf, offset - oldOffset - 2, oldOffset);
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rtxt.encode.bytes = offset - oldOffset;
|
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return buf;
|
||
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},
|
||
|
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decode(buf, offset) {
|
||
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if (!offset) offset = 0;
|
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const oldOffset = offset;
|
||
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let remaining = b.readUInt16BE(buf, offset);
|
||
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offset += 2;
|
||
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const data = [];
|
||
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while (remaining > 0) {
|
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const len = buf[offset++];
|
||
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--remaining;
|
||
|
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if (remaining < len) {
|
||
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throw new Error('Buffer overflow');
|
||
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}
|
||
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data.push(buf.slice(offset, offset + len));
|
||
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offset += len;
|
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remaining -= len;
|
||
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}
|
||
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rtxt.decode.bytes = offset - oldOffset;
|
||
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return data;
|
||
|
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},
|
||
|
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encodingLength(data) {
|
||
|
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if (!Array.isArray(data)) data = [data];
|
||
|
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let length = 2;
|
||
|
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data.forEach(function (buf) {
|
||
|
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if (typeof buf === 'string') {
|
||
|
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length += b.bytelength(buf) + 1;
|
||
|
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} else {
|
||
|
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length += buf.length + 1;
|
||
|
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}
|
||
|
|
});
|
||
|
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return length;
|
||
|
|
}
|
||
|
|
});
|
||
|
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exports.txt = rtxt;
|
||
|
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const rnull = codec({
|
||
|
|
encode(data, buf, offset) {
|
||
|
|
if (!buf) buf = new Uint8Array(rnull.encodingLength(data));
|
||
|
|
if (!offset) offset = 0;
|
||
|
|
if (typeof data === 'string') data = b.from(data);
|
||
|
|
if (!data) data = new Uint8Array(0);
|
||
|
|
const oldOffset = offset;
|
||
|
|
offset += 2;
|
||
|
|
const len = data.length;
|
||
|
|
b.copy(data, buf, offset, 0, len);
|
||
|
|
offset += len;
|
||
|
|
b.writeUInt16BE(buf, offset - oldOffset - 2, oldOffset);
|
||
|
|
rnull.encode.bytes = offset - oldOffset;
|
||
|
|
return buf;
|
||
|
|
},
|
||
|
|
decode(buf, offset) {
|
||
|
|
if (!offset) offset = 0;
|
||
|
|
const oldOffset = offset;
|
||
|
|
const len = b.readUInt16BE(buf, offset);
|
||
|
|
offset += 2;
|
||
|
|
const data = buf.slice(offset, offset + len);
|
||
|
|
offset += len;
|
||
|
|
rnull.decode.bytes = offset - oldOffset;
|
||
|
|
return data;
|
||
|
|
},
|
||
|
|
encodingLength(data) {
|
||
|
|
if (!data) return 2;
|
||
|
|
return (b.isU8Arr(data) ? data.length : b.bytelength(data)) + 2;
|
||
|
|
}
|
||
|
|
});
|
||
|
|
exports.null = rnull;
|
||
|
|
const rhinfo = codec({
|
||
|
|
encode(data, buf, offset) {
|
||
|
|
if (!buf) buf = new Uint8Array(rhinfo.encodingLength(data));
|
||
|
|
if (!offset) offset = 0;
|
||
|
|
const oldOffset = offset;
|
||
|
|
offset += 2;
|
||
|
|
string.encode(data.cpu, buf, offset);
|
||
|
|
offset += string.encode.bytes;
|
||
|
|
string.encode(data.os, buf, offset);
|
||
|
|
offset += string.encode.bytes;
|
||
|
|
b.writeUInt16BE(buf, offset - oldOffset - 2, oldOffset);
|
||
|
|
rhinfo.encode.bytes = offset - oldOffset;
|
||
|
|
return buf;
|
||
|
|
},
|
||
|
|
decode(buf, offset) {
|
||
|
|
if (!offset) offset = 0;
|
||
|
|
const oldOffset = offset;
|
||
|
|
const data = {};
|
||
|
|
offset += 2;
|
||
|
|
data.cpu = string.decode(buf, offset);
|
||
|
|
offset += string.decode.bytes;
|
||
|
|
data.os = string.decode(buf, offset);
|
||
|
|
offset += string.decode.bytes;
|
||
|
|
rhinfo.decode.bytes = offset - oldOffset;
|
||
|
|
return data;
|
||
|
|
},
|
||
|
|
encodingLength(data) {
|
||
|
|
return string.encodingLength(data.cpu) + string.encodingLength(data.os) + 2;
|
||
|
|
}
|
||
|
|
});
|
||
|
|
exports.hinfo = rhinfo;
|
||
|
|
const rptr = codec({
|
||
|
|
encode(data, buf, offset) {
|
||
|
|
if (!buf) buf = new Uint8Array(rptr.encodingLength(data));
|
||
|
|
if (!offset) offset = 0;
|
||
|
|
name.encode(data, buf, offset + 2);
|
||
|
|
b.writeUInt16BE(buf, name.encode.bytes, offset);
|
||
|
|
rptr.encode.bytes = name.encode.bytes + 2;
|
||
|
|
return buf;
|
||
|
|
},
|
||
|
|
decode(buf, offset) {
|
||
|
|
if (!offset) offset = 0;
|
||
|
|
const data = name.decode(buf, offset + 2);
|
||
|
|
rptr.decode.bytes = name.decode.bytes + 2;
|
||
|
|
return data;
|
||
|
|
},
|
||
|
|
encodingLength(data) {
|
||
|
|
return name.encodingLength(data) + 2;
|
||
|
|
}
|
||
|
|
});
|
||
|
|
exports.dname = exports.cname = exports.ptr = rptr;
|
||
|
|
const rsrv = codec({
|
||
|
|
encode(data, buf, offset) {
|
||
|
|
if (!buf) buf = new Uint8Array(rsrv.encodingLength(data));
|
||
|
|
if (!offset) offset = 0;
|
||
|
|
b.writeUInt16BE(buf, data.priority || 0, offset + 2);
|
||
|
|
b.writeUInt16BE(buf, data.weight || 0, offset + 4);
|
||
|
|
b.writeUInt16BE(buf, data.port || 0, offset + 6);
|
||
|
|
name.encode(data.target, buf, offset + 8);
|
||
|
|
const len = name.encode.bytes + 6;
|
||
|
|
b.writeUInt16BE(buf, len, offset);
|
||
|
|
rsrv.encode.bytes = len + 2;
|
||
|
|
return buf;
|
||
|
|
},
|
||
|
|
decode(buf, offset) {
|
||
|
|
if (!offset) offset = 0;
|
||
|
|
const len = b.readUInt16BE(buf, offset);
|
||
|
|
const data = {};
|
||
|
|
data.priority = b.readUInt16BE(buf, offset + 2);
|
||
|
|
data.weight = b.readUInt16BE(buf, offset + 4);
|
||
|
|
data.port = b.readUInt16BE(buf, offset + 6);
|
||
|
|
data.target = name.decode(buf, offset + 8);
|
||
|
|
rsrv.decode.bytes = len + 2;
|
||
|
|
return data;
|
||
|
|
},
|
||
|
|
encodingLength(data) {
|
||
|
|
return 8 + name.encodingLength(data.target);
|
||
|
|
}
|
||
|
|
});
|
||
|
|
exports.srv = rsrv;
|
||
|
|
const rcaa = codec({
|
||
|
|
encode(data, buf, offset) {
|
||
|
|
const len = rcaa.encodingLength(data);
|
||
|
|
if (!buf) buf = new Uint8Array(rcaa.encodingLength(data));
|
||
|
|
if (!offset) offset = 0;
|
||
|
|
if (data.issuerCritical) {
|
||
|
|
data.flags = rcaa.ISSUER_CRITICAL;
|
||
|
|
}
|
||
|
|
b.writeUInt16BE(buf, len - 2, offset);
|
||
|
|
offset += 2;
|
||
|
|
buf[offset] = data.flags || 0;
|
||
|
|
offset += 1;
|
||
|
|
string.encode(data.tag, buf, offset);
|
||
|
|
offset += string.encode.bytes;
|
||
|
|
b.write(buf, data.value, offset);
|
||
|
|
offset += b.bytelength(data.value);
|
||
|
|
rcaa.encode.bytes = len;
|
||
|
|
return buf;
|
||
|
|
},
|
||
|
|
decode(buf, offset) {
|
||
|
|
if (!offset) offset = 0;
|
||
|
|
const len = b.readUInt16BE(buf, offset);
|
||
|
|
offset += 2;
|
||
|
|
const oldOffset = offset;
|
||
|
|
const data = {};
|
||
|
|
data.flags = buf[offset];
|
||
|
|
offset += 1;
|
||
|
|
data.tag = string.decode(buf, offset);
|
||
|
|
offset += string.decode.bytes;
|
||
|
|
data.value = (0, _utf8Codec.decode)(buf, offset, oldOffset + len);
|
||
|
|
data.issuerCritical = !!(data.flags & rcaa.ISSUER_CRITICAL);
|
||
|
|
rcaa.decode.bytes = len + 2;
|
||
|
|
return data;
|
||
|
|
},
|
||
|
|
encodingLength(data) {
|
||
|
|
return string.encodingLength(data.tag) + string.encodingLength(data.value) + 2;
|
||
|
|
}
|
||
|
|
});
|
||
|
|
exports.caa = rcaa;
|
||
|
|
rcaa.ISSUER_CRITICAL = 1 << 7;
|
||
|
|
const rmx = codec({
|
||
|
|
encode(data, buf, offset) {
|
||
|
|
if (!buf) buf = new Uint8Array(rmx.encodingLength(data));
|
||
|
|
if (!offset) offset = 0;
|
||
|
|
const oldOffset = offset;
|
||
|
|
offset += 2;
|
||
|
|
b.writeUInt16BE(buf, data.preference || 0, offset);
|
||
|
|
offset += 2;
|
||
|
|
name.encode(data.exchange, buf, offset);
|
||
|
|
offset += name.encode.bytes;
|
||
|
|
b.writeUInt16BE(buf, offset - oldOffset - 2, oldOffset);
|
||
|
|
rmx.encode.bytes = offset - oldOffset;
|
||
|
|
return buf;
|
||
|
|
},
|
||
|
|
decode(buf, offset) {
|
||
|
|
if (!offset) offset = 0;
|
||
|
|
const oldOffset = offset;
|
||
|
|
const data = {};
|
||
|
|
offset += 2;
|
||
|
|
data.preference = b.readUInt16BE(buf, offset);
|
||
|
|
offset += 2;
|
||
|
|
data.exchange = name.decode(buf, offset);
|
||
|
|
offset += name.decode.bytes;
|
||
|
|
rmx.decode.bytes = offset - oldOffset;
|
||
|
|
return data;
|
||
|
|
},
|
||
|
|
encodingLength(data) {
|
||
|
|
return 4 + name.encodingLength(data.exchange);
|
||
|
|
}
|
||
|
|
});
|
||
|
|
exports.mx = rmx;
|
||
|
|
const ra = codec({
|
||
|
|
encode(host, buf, offset) {
|
||
|
|
if (!buf) buf = new Uint8Array(ra.encodingLength(host));
|
||
|
|
if (!offset) offset = 0;
|
||
|
|
b.writeUInt16BE(buf, 4, offset);
|
||
|
|
offset += 2;
|
||
|
|
ip.v4.encode(host, buf, offset);
|
||
|
|
return buf;
|
||
|
|
},
|
||
|
|
decode(buf, offset) {
|
||
|
|
if (!offset) offset = 0;
|
||
|
|
offset += 2;
|
||
|
|
const host = ip.v4.decode(buf, offset);
|
||
|
|
return host;
|
||
|
|
},
|
||
|
|
bytes: 6
|
||
|
|
});
|
||
|
|
exports.a = ra;
|
||
|
|
const raaaa = codec({
|
||
|
|
encode(host, buf, offset) {
|
||
|
|
if (!buf) buf = new Uint8Array(raaaa.encodingLength(host));
|
||
|
|
if (!offset) offset = 0;
|
||
|
|
b.writeUInt16BE(buf, 16, offset);
|
||
|
|
offset += 2;
|
||
|
|
ip.v6.encode(host, buf, offset);
|
||
|
|
raaaa.encode.bytes = 18;
|
||
|
|
return buf;
|
||
|
|
},
|
||
|
|
decode(buf, offset) {
|
||
|
|
if (!offset) offset = 0;
|
||
|
|
offset += 2;
|
||
|
|
const host = ip.v6.decode(buf, offset);
|
||
|
|
raaaa.decode.bytes = 18;
|
||
|
|
return host;
|
||
|
|
},
|
||
|
|
bytes: 18
|
||
|
|
});
|
||
|
|
exports.aaaa = raaaa;
|
||
|
|
const alloc = size => new Uint8Array(size);
|
||
|
|
const roption = codec({
|
||
|
|
encode(option, buf, offset) {
|
||
|
|
if (!buf) buf = new Uint8Array(roption.encodingLength(option));
|
||
|
|
if (!offset) offset = 0;
|
||
|
|
const oldOffset = offset;
|
||
|
|
const code = optioncodes.toCode(option.code);
|
||
|
|
b.writeUInt16BE(buf, code, offset);
|
||
|
|
offset += 2;
|
||
|
|
if (option.data) {
|
||
|
|
b.writeUInt16BE(buf, option.data.length, offset);
|
||
|
|
offset += 2;
|
||
|
|
b.copy(option.data, buf, offset);
|
||
|
|
offset += option.data.length;
|
||
|
|
} else {
|
||
|
|
switch (code) {
|
||
|
|
// case 3: NSID. No encode makes sense.
|
||
|
|
// case 5,6,7: Not implementable
|
||
|
|
case 8:
|
||
|
|
// ECS
|
||
|
|
{
|
||
|
|
// note: do IP math before calling
|
||
|
|
const spl = option.sourcePrefixLength || 0;
|
||
|
|
const fam = option.family || ip.familyOf(option.ip, alloc);
|
||
|
|
const ipBuf = ip.encode(option.ip, alloc);
|
||
|
|
const ipLen = Math.ceil(spl / 8);
|
||
|
|
b.writeUInt16BE(buf, ipLen + 4, offset);
|
||
|
|
offset += 2;
|
||
|
|
b.writeUInt16BE(buf, fam, offset);
|
||
|
|
offset += 2;
|
||
|
|
buf[offset++] = spl;
|
||
|
|
buf[offset++] = option.scopePrefixLength || 0;
|
||
|
|
b.copy(ipBuf, buf, offset, 0, ipLen);
|
||
|
|
offset += ipLen;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
// case 9: EXPIRE (experimental)
|
||
|
|
// case 10: COOKIE. No encode makes sense.
|
||
|
|
case 11:
|
||
|
|
// KEEP-ALIVE
|
||
|
|
if (option.timeout) {
|
||
|
|
b.writeUInt16BE(buf, 2, offset);
|
||
|
|
offset += 2;
|
||
|
|
b.writeUInt16BE(buf, option.timeout, offset);
|
||
|
|
offset += 2;
|
||
|
|
} else {
|
||
|
|
b.writeUInt16BE(buf, 0, offset);
|
||
|
|
offset += 2;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
case 12:
|
||
|
|
// PADDING
|
||
|
|
{
|
||
|
|
const len = option.length || 0;
|
||
|
|
b.writeUInt16BE(buf, len, offset);
|
||
|
|
offset += 2;
|
||
|
|
buf.fill(0, offset, offset + len);
|
||
|
|
offset += len;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
// case 13: CHAIN. Experimental.
|
||
|
|
case 14:
|
||
|
|
// KEY-TAG
|
||
|
|
{
|
||
|
|
const tagsLen = option.tags.length * 2;
|
||
|
|
b.writeUInt16BE(buf, tagsLen, offset);
|
||
|
|
offset += 2;
|
||
|
|
for (const tag of option.tags) {
|
||
|
|
b.writeUInt16BE(buf, tag, offset);
|
||
|
|
offset += 2;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
throw new Error(`Unknown roption code: ${option.code}`);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
roption.encode.bytes = offset - oldOffset;
|
||
|
|
return buf;
|
||
|
|
},
|
||
|
|
decode(buf, offset) {
|
||
|
|
if (!offset) offset = 0;
|
||
|
|
const option = {};
|
||
|
|
option.code = b.readUInt16BE(buf, offset);
|
||
|
|
option.type = optioncodes.toString(option.code);
|
||
|
|
offset += 2;
|
||
|
|
const len = b.readUInt16BE(buf, offset);
|
||
|
|
offset += 2;
|
||
|
|
option.data = buf.slice(offset, offset + len);
|
||
|
|
switch (option.code) {
|
||
|
|
// case 3: NSID. No decode makes sense.
|
||
|
|
case 8:
|
||
|
|
// ECS
|
||
|
|
option.family = b.readUInt16BE(buf, offset);
|
||
|
|
offset += 2;
|
||
|
|
option.sourcePrefixLength = buf[offset++];
|
||
|
|
option.scopePrefixLength = buf[offset++];
|
||
|
|
{
|
||
|
|
const padded = new Uint8Array(option.family === 1 ? 4 : 16);
|
||
|
|
b.copy(buf, padded, 0, offset, offset + len - 4);
|
||
|
|
option.ip = ip.decode(padded);
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
// case 12: Padding. No decode makes sense.
|
||
|
|
case 11:
|
||
|
|
// KEEP-ALIVE
|
||
|
|
if (len > 0) {
|
||
|
|
option.timeout = b.readUInt16BE(buf, offset);
|
||
|
|
offset += 2;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
case 14:
|
||
|
|
option.tags = [];
|
||
|
|
for (let i = 0; i < len; i += 2) {
|
||
|
|
option.tags.push(b.readUInt16BE(buf, offset));
|
||
|
|
offset += 2;
|
||
|
|
}
|
||
|
|
// don't worry about default. caller will use data if desired
|
||
|
|
}
|
||
|
|
|
||
|
|
roption.decode.bytes = len + 4;
|
||
|
|
return option;
|
||
|
|
},
|
||
|
|
encodingLength(option) {
|
||
|
|
if (option.data) {
|
||
|
|
return option.data.length + 4;
|
||
|
|
}
|
||
|
|
const code = optioncodes.toCode(option.code);
|
||
|
|
switch (code) {
|
||
|
|
case 8:
|
||
|
|
// ECS
|
||
|
|
{
|
||
|
|
const spl = option.sourcePrefixLength || 0;
|
||
|
|
return Math.ceil(spl / 8) + 8;
|
||
|
|
}
|
||
|
|
case 11:
|
||
|
|
// KEEP-ALIVE
|
||
|
|
return typeof option.timeout === 'number' ? 6 : 4;
|
||
|
|
case 12:
|
||
|
|
// PADDING
|
||
|
|
return option.length + 4;
|
||
|
|
case 14:
|
||
|
|
// KEY-TAG
|
||
|
|
return 4 + option.tags.length * 2;
|
||
|
|
}
|
||
|
|
throw new Error(`Unknown roption code: ${option.code}`);
|
||
|
|
}
|
||
|
|
});
|
||
|
|
exports.option = roption;
|
||
|
|
const ropt = codec({
|
||
|
|
encode(options, buf, offset) {
|
||
|
|
if (!buf) buf = new Uint8Array(ropt.encodingLength(options));
|
||
|
|
if (!offset) offset = 0;
|
||
|
|
const oldOffset = offset;
|
||
|
|
const rdlen = encodingLengthList(options, roption);
|
||
|
|
b.writeUInt16BE(buf, rdlen, offset);
|
||
|
|
offset = encodeList(options, roption, buf, offset + 2);
|
||
|
|
ropt.encode.bytes = offset - oldOffset;
|
||
|
|
return buf;
|
||
|
|
},
|
||
|
|
decode(buf, offset) {
|
||
|
|
if (!offset) offset = 0;
|
||
|
|
const oldOffset = offset;
|
||
|
|
const options = [];
|
||
|
|
let rdlen = b.readUInt16BE(buf, offset);
|
||
|
|
offset += 2;
|
||
|
|
let o = 0;
|
||
|
|
while (rdlen > 0) {
|
||
|
|
options[o++] = roption.decode(buf, offset);
|
||
|
|
offset += roption.decode.bytes;
|
||
|
|
rdlen -= roption.decode.bytes;
|
||
|
|
}
|
||
|
|
ropt.decode.bytes = offset - oldOffset;
|
||
|
|
return options;
|
||
|
|
},
|
||
|
|
encodingLength(options) {
|
||
|
|
return 2 + encodingLengthList(options || [], roption);
|
||
|
|
}
|
||
|
|
});
|
||
|
|
exports.opt = ropt;
|
||
|
|
const rdnskey = codec({
|
||
|
|
encode(key, buf, offset) {
|
||
|
|
if (!buf) buf = new Uint8Array(rdnskey.encodingLength(key));
|
||
|
|
if (!offset) offset = 0;
|
||
|
|
const oldOffset = offset;
|
||
|
|
const keydata = key.key;
|
||
|
|
if (!b.isU8Arr(keydata)) {
|
||
|
|
throw new Error('Key must be a Buffer');
|
||
|
|
}
|
||
|
|
offset += 2; // Leave space for length
|
||
|
|
b.writeUInt16BE(buf, key.flags, offset);
|
||
|
|
offset += 2;
|
||
|
|
buf[offset] = rdnskey.PROTOCOL_DNSSEC;
|
||
|
|
offset += 1;
|
||
|
|
buf[offset] = key.algorithm;
|
||
|
|
offset += 1;
|
||
|
|
b.copy(keydata, buf, offset, 0, keydata.length);
|
||
|
|
offset += keydata.length;
|
||
|
|
rdnskey.encode.bytes = offset - oldOffset;
|
||
|
|
b.writeUInt16BE(buf, rdnskey.encode.bytes - 2, oldOffset);
|
||
|
|
return buf;
|
||
|
|
},
|
||
|
|
decode(buf, offset) {
|
||
|
|
if (!offset) offset = 0;
|
||
|
|
const oldOffset = offset;
|
||
|
|
const key = {};
|
||
|
|
const length = b.readUInt16BE(buf, offset);
|
||
|
|
offset += 2;
|
||
|
|
key.flags = b.readUInt16BE(buf, offset);
|
||
|
|
offset += 2;
|
||
|
|
if (buf[offset] !== rdnskey.PROTOCOL_DNSSEC) {
|
||
|
|
throw new Error('Protocol must be 3');
|
||
|
|
}
|
||
|
|
offset += 1;
|
||
|
|
key.algorithm = buf[offset];
|
||
|
|
offset += 1;
|
||
|
|
key.key = buf.slice(offset, oldOffset + length + 2);
|
||
|
|
offset += key.key.length;
|
||
|
|
rdnskey.decode.bytes = offset - oldOffset;
|
||
|
|
return key;
|
||
|
|
},
|
||
|
|
encodingLength(key) {
|
||
|
|
return 6 + b.bytelength(key.key);
|
||
|
|
}
|
||
|
|
});
|
||
|
|
exports.dnskey = rdnskey;
|
||
|
|
rdnskey.PROTOCOL_DNSSEC = 3;
|
||
|
|
rdnskey.ZONE_KEY = 0x80;
|
||
|
|
rdnskey.SECURE_ENTRYPOINT = 0x8000;
|
||
|
|
const rrrsig = codec({
|
||
|
|
encode(sig, buf, offset) {
|
||
|
|
if (!buf) buf = new Uint8Array(rrrsig.encodingLength(sig));
|
||
|
|
if (!offset) offset = 0;
|
||
|
|
const oldOffset = offset;
|
||
|
|
const signature = sig.signature;
|
||
|
|
if (!b.isU8Arr(signature)) {
|
||
|
|
throw new Error('Signature must be a Buffer');
|
||
|
|
}
|
||
|
|
offset += 2; // Leave space for length
|
||
|
|
b.writeUInt16BE(buf, types.toType(sig.typeCovered), offset);
|
||
|
|
offset += 2;
|
||
|
|
buf[offset] = sig.algorithm;
|
||
|
|
offset += 1;
|
||
|
|
buf[offset] = sig.labels;
|
||
|
|
offset += 1;
|
||
|
|
b.writeUInt32BE(buf, sig.originalTTL, offset);
|
||
|
|
offset += 4;
|
||
|
|
b.writeUInt32BE(buf, sig.expiration, offset);
|
||
|
|
offset += 4;
|
||
|
|
b.writeUInt32BE(buf, sig.inception, offset);
|
||
|
|
offset += 4;
|
||
|
|
b.writeUInt16BE(buf, sig.keyTag, offset);
|
||
|
|
offset += 2;
|
||
|
|
name.encode(sig.signersName, buf, offset);
|
||
|
|
offset += name.encode.bytes;
|
||
|
|
b.copy(signature, buf, offset, 0, signature.length);
|
||
|
|
offset += signature.length;
|
||
|
|
rrrsig.encode.bytes = offset - oldOffset;
|
||
|
|
b.writeUInt16BE(buf, rrrsig.encode.bytes - 2, oldOffset);
|
||
|
|
return buf;
|
||
|
|
},
|
||
|
|
decode(buf, offset) {
|
||
|
|
if (!offset) offset = 0;
|
||
|
|
const oldOffset = offset;
|
||
|
|
const sig = {};
|
||
|
|
const length = b.readUInt16BE(buf, offset);
|
||
|
|
offset += 2;
|
||
|
|
sig.typeCovered = types.toString(b.readUInt16BE(buf, offset));
|
||
|
|
offset += 2;
|
||
|
|
sig.algorithm = buf[offset];
|
||
|
|
offset += 1;
|
||
|
|
sig.labels = buf[offset];
|
||
|
|
offset += 1;
|
||
|
|
sig.originalTTL = b.readUInt32BE(buf, offset);
|
||
|
|
offset += 4;
|
||
|
|
sig.expiration = b.readUInt32BE(buf, offset);
|
||
|
|
offset += 4;
|
||
|
|
sig.inception = b.readUInt32BE(buf, offset);
|
||
|
|
offset += 4;
|
||
|
|
sig.keyTag = b.readUInt16BE(buf, offset);
|
||
|
|
offset += 2;
|
||
|
|
sig.signersName = name.decode(buf, offset);
|
||
|
|
offset += name.decode.bytes;
|
||
|
|
sig.signature = buf.slice(offset, oldOffset + length + 2);
|
||
|
|
offset += sig.signature.length;
|
||
|
|
rrrsig.decode.bytes = offset - oldOffset;
|
||
|
|
return sig;
|
||
|
|
},
|
||
|
|
encodingLength(sig) {
|
||
|
|
return 20 + name.encodingLength(sig.signersName) + b.bytelength(sig.signature);
|
||
|
|
}
|
||
|
|
});
|
||
|
|
exports.rrsig = rrrsig;
|
||
|
|
const rrp = codec({
|
||
|
|
encode(data, buf, offset) {
|
||
|
|
if (!buf) buf = new Uint8Array(rrp.encodingLength(data));
|
||
|
|
if (!offset) offset = 0;
|
||
|
|
const oldOffset = offset;
|
||
|
|
offset += 2; // Leave space for length
|
||
|
|
name.encode(data.mbox || '.', buf, offset);
|
||
|
|
offset += name.encode.bytes;
|
||
|
|
name.encode(data.txt || '.', buf, offset);
|
||
|
|
offset += name.encode.bytes;
|
||
|
|
rrp.encode.bytes = offset - oldOffset;
|
||
|
|
b.writeUInt16BE(buf, rrp.encode.bytes - 2, oldOffset);
|
||
|
|
return buf;
|
||
|
|
},
|
||
|
|
decode(buf, offset) {
|
||
|
|
if (!offset) offset = 0;
|
||
|
|
const oldOffset = offset;
|
||
|
|
const data = {};
|
||
|
|
offset += 2;
|
||
|
|
data.mbox = name.decode(buf, offset) || '.';
|
||
|
|
offset += name.decode.bytes;
|
||
|
|
data.txt = name.decode(buf, offset) || '.';
|
||
|
|
offset += name.decode.bytes;
|
||
|
|
rrp.decode.bytes = offset - oldOffset;
|
||
|
|
return data;
|
||
|
|
},
|
||
|
|
encodingLength(data) {
|
||
|
|
return 2 + name.encodingLength(data.mbox || '.') + name.encodingLength(data.txt || '.');
|
||
|
|
}
|
||
|
|
});
|
||
|
|
exports.rp = rrp;
|
||
|
|
const typebitmap = codec({
|
||
|
|
encode(typelist, buf, offset) {
|
||
|
|
if (!buf) buf = new Uint8Array(typebitmap.encodingLength(typelist));
|
||
|
|
if (!offset) offset = 0;
|
||
|
|
const oldOffset = offset;
|
||
|
|
const typesByWindow = [];
|
||
|
|
for (let i = 0; i < typelist.length; i++) {
|
||
|
|
const typeid = types.toType(typelist[i]);
|
||
|
|
if (typesByWindow[typeid >> 8] === undefined) {
|
||
|
|
typesByWindow[typeid >> 8] = [];
|
||
|
|
}
|
||
|
|
typesByWindow[typeid >> 8][typeid >> 3 & 0x1F] |= 1 << 7 - (typeid & 0x7);
|
||
|
|
}
|
||
|
|
for (let i = 0; i < typesByWindow.length; i++) {
|
||
|
|
if (typesByWindow[i] !== undefined) {
|
||
|
|
const windowBuf = b.from(typesByWindow[i]);
|
||
|
|
buf[offset] = i;
|
||
|
|
offset += 1;
|
||
|
|
buf[offset] = windowBuf.length;
|
||
|
|
offset += 1;
|
||
|
|
b.copy(windowBuf, buf, offset, 0, windowBuf.length);
|
||
|
|
offset += windowBuf.length;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
typebitmap.encode.bytes = offset - oldOffset;
|
||
|
|
return buf;
|
||
|
|
},
|
||
|
|
decode(buf, offset, length) {
|
||
|
|
if (!offset) offset = 0;
|
||
|
|
const oldOffset = offset;
|
||
|
|
const typelist = [];
|
||
|
|
while (offset - oldOffset < length) {
|
||
|
|
const window = buf[offset];
|
||
|
|
offset += 1;
|
||
|
|
const windowLength = buf[offset];
|
||
|
|
offset += 1;
|
||
|
|
for (let i = 0; i < windowLength; i++) {
|
||
|
|
const b = buf[offset + i];
|
||
|
|
for (let j = 0; j < 8; j++) {
|
||
|
|
if (b & 1 << 7 - j) {
|
||
|
|
const typeid = types.toString(window << 8 | i << 3 | j);
|
||
|
|
typelist.push(typeid);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
offset += windowLength;
|
||
|
|
}
|
||
|
|
typebitmap.decode.bytes = offset - oldOffset;
|
||
|
|
return typelist;
|
||
|
|
},
|
||
|
|
encodingLength(typelist) {
|
||
|
|
const extents = [];
|
||
|
|
for (let i = 0; i < typelist.length; i++) {
|
||
|
|
const typeid = types.toType(typelist[i]);
|
||
|
|
extents[typeid >> 8] = Math.max(extents[typeid >> 8] || 0, typeid & 0xFF);
|
||
|
|
}
|
||
|
|
let len = 0;
|
||
|
|
for (let i = 0; i < extents.length; i++) {
|
||
|
|
if (extents[i] !== undefined) {
|
||
|
|
len += 2 + Math.ceil((extents[i] + 1) / 8);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return len;
|
||
|
|
}
|
||
|
|
});
|
||
|
|
const rnsec = codec({
|
||
|
|
encode(record, buf, offset) {
|
||
|
|
if (!buf) buf = new Uint8Array(rnsec.encodingLength(record));
|
||
|
|
if (!offset) offset = 0;
|
||
|
|
const oldOffset = offset;
|
||
|
|
offset += 2; // Leave space for length
|
||
|
|
name.encode(record.nextDomain, buf, offset);
|
||
|
|
offset += name.encode.bytes;
|
||
|
|
typebitmap.encode(record.rrtypes, buf, offset);
|
||
|
|
offset += typebitmap.encode.bytes;
|
||
|
|
rnsec.encode.bytes = offset - oldOffset;
|
||
|
|
b.writeUInt16BE(buf, rnsec.encode.bytes - 2, oldOffset);
|
||
|
|
return buf;
|
||
|
|
},
|
||
|
|
decode(buf, offset) {
|
||
|
|
if (!offset) offset = 0;
|
||
|
|
const oldOffset = offset;
|
||
|
|
const record = {};
|
||
|
|
const length = b.readUInt16BE(buf, offset);
|
||
|
|
offset += 2;
|
||
|
|
record.nextDomain = name.decode(buf, offset);
|
||
|
|
offset += name.decode.bytes;
|
||
|
|
record.rrtypes = typebitmap.decode(buf, offset, length - (offset - oldOffset));
|
||
|
|
offset += typebitmap.decode.bytes;
|
||
|
|
rnsec.decode.bytes = offset - oldOffset;
|
||
|
|
return record;
|
||
|
|
},
|
||
|
|
encodingLength(record) {
|
||
|
|
return 2 + name.encodingLength(record.nextDomain) + typebitmap.encodingLength(record.rrtypes);
|
||
|
|
}
|
||
|
|
});
|
||
|
|
exports.nsec = rnsec;
|
||
|
|
const rnsec3 = codec({
|
||
|
|
encode(record, buf, offset) {
|
||
|
|
if (!buf) buf = new Uint8Array(rnsec3.encodingLength(record));
|
||
|
|
if (!offset) offset = 0;
|
||
|
|
const oldOffset = offset;
|
||
|
|
const salt = record.salt;
|
||
|
|
if (!b.isU8Arr(salt)) {
|
||
|
|
throw new Error('salt must be a Buffer');
|
||
|
|
}
|
||
|
|
const nextDomain = record.nextDomain;
|
||
|
|
if (!b.isU8Arr(nextDomain)) {
|
||
|
|
throw new Error('nextDomain must be a Buffer');
|
||
|
|
}
|
||
|
|
offset += 2; // Leave space for length
|
||
|
|
buf[offset] = record.algorithm;
|
||
|
|
offset += 1;
|
||
|
|
buf[offset] = record.flags;
|
||
|
|
offset += 1;
|
||
|
|
b.writeUInt16BE(buf, record.iterations, offset);
|
||
|
|
offset += 2;
|
||
|
|
buf[offset] = salt.length;
|
||
|
|
offset += 1;
|
||
|
|
b.copy(salt, buf, offset, 0, salt.length);
|
||
|
|
offset += salt.length;
|
||
|
|
buf[offset] = nextDomain.length;
|
||
|
|
offset += 1;
|
||
|
|
b.copy(nextDomain, buf, offset, 0, nextDomain.length);
|
||
|
|
offset += nextDomain.length;
|
||
|
|
typebitmap.encode(record.rrtypes, buf, offset);
|
||
|
|
offset += typebitmap.encode.bytes;
|
||
|
|
rnsec3.encode.bytes = offset - oldOffset;
|
||
|
|
b.writeUInt16BE(buf, rnsec3.encode.bytes - 2, oldOffset);
|
||
|
|
return buf;
|
||
|
|
},
|
||
|
|
decode(buf, offset) {
|
||
|
|
if (!offset) offset = 0;
|
||
|
|
const oldOffset = offset;
|
||
|
|
const record = {};
|
||
|
|
const length = b.readUInt16BE(buf, offset);
|
||
|
|
offset += 2;
|
||
|
|
record.algorithm = buf[offset];
|
||
|
|
offset += 1;
|
||
|
|
record.flags = buf[offset];
|
||
|
|
offset += 1;
|
||
|
|
record.iterations = b.readUInt16BE(buf, offset);
|
||
|
|
offset += 2;
|
||
|
|
const saltLength = buf[offset];
|
||
|
|
offset += 1;
|
||
|
|
record.salt = buf.slice(offset, offset + saltLength);
|
||
|
|
offset += saltLength;
|
||
|
|
const hashLength = buf[offset];
|
||
|
|
offset += 1;
|
||
|
|
record.nextDomain = buf.slice(offset, offset + hashLength);
|
||
|
|
offset += hashLength;
|
||
|
|
record.rrtypes = typebitmap.decode(buf, offset, length - (offset - oldOffset));
|
||
|
|
offset += typebitmap.decode.bytes;
|
||
|
|
rnsec3.decode.bytes = offset - oldOffset;
|
||
|
|
return record;
|
||
|
|
},
|
||
|
|
encodingLength(record) {
|
||
|
|
return 8 + record.salt.length + record.nextDomain.length + typebitmap.encodingLength(record.rrtypes);
|
||
|
|
}
|
||
|
|
});
|
||
|
|
exports.nsec3 = rnsec3;
|
||
|
|
const rds = codec({
|
||
|
|
encode(digest, buf, offset) {
|
||
|
|
if (!buf) buf = new Uint8Array(rds.encodingLength(digest));
|
||
|
|
if (!offset) offset = 0;
|
||
|
|
const oldOffset = offset;
|
||
|
|
const digestdata = digest.digest;
|
||
|
|
if (!b.isU8Arr(digestdata)) {
|
||
|
|
throw new Error('Digest must be a Buffer');
|
||
|
|
}
|
||
|
|
offset += 2; // Leave space for length
|
||
|
|
b.writeUInt16BE(buf, digest.keyTag, offset);
|
||
|
|
offset += 2;
|
||
|
|
buf[offset] = digest.algorithm;
|
||
|
|
offset += 1;
|
||
|
|
buf[offset] = digest.digestType;
|
||
|
|
offset += 1;
|
||
|
|
b.copy(digestdata, buf, offset, 0, digestdata.length);
|
||
|
|
offset += digestdata.length;
|
||
|
|
rds.encode.bytes = offset - oldOffset;
|
||
|
|
b.writeUInt16BE(buf, rds.encode.bytes - 2, oldOffset);
|
||
|
|
return buf;
|
||
|
|
},
|
||
|
|
decode(buf, offset) {
|
||
|
|
if (!offset) offset = 0;
|
||
|
|
const oldOffset = offset;
|
||
|
|
const digest = {};
|
||
|
|
const length = b.readUInt16BE(buf, offset);
|
||
|
|
offset += 2;
|
||
|
|
digest.keyTag = b.readUInt16BE(buf, offset);
|
||
|
|
offset += 2;
|
||
|
|
digest.algorithm = buf[offset];
|
||
|
|
offset += 1;
|
||
|
|
digest.digestType = buf[offset];
|
||
|
|
offset += 1;
|
||
|
|
digest.digest = buf.slice(offset, oldOffset + length + 2);
|
||
|
|
offset += digest.digest.length;
|
||
|
|
rds.decode.bytes = offset - oldOffset;
|
||
|
|
return digest;
|
||
|
|
},
|
||
|
|
encodingLength(digest) {
|
||
|
|
return 6 + b.bytelength(digest.digest);
|
||
|
|
}
|
||
|
|
});
|
||
|
|
exports.ds = rds;
|
||
|
|
const rsshfp = codec({
|
||
|
|
encode(record, buf, offset) {
|
||
|
|
if (!buf) buf = new Uint8Array(rsshfp.encodingLength(record));
|
||
|
|
if (!offset) offset = 0;
|
||
|
|
const oldOffset = offset;
|
||
|
|
offset += 2; // The function call starts with the offset pointer at the RDLENGTH field, not the RDATA one
|
||
|
|
buf[offset] = record.algorithm;
|
||
|
|
offset += 1;
|
||
|
|
buf[offset] = record.hash;
|
||
|
|
offset += 1;
|
||
|
|
const fingerprintLength = b.hexLength(record.fingerprint);
|
||
|
|
const expectedLength = getFingerprintLengthForHashType(record.hash);
|
||
|
|
if (fingerprintLength !== expectedLength) {
|
||
|
|
throw new Error(`Invalid length of fingerprint "${record.fingerprint}" for hashType=${record.hash}: ${fingerprintLength} != ${expectedLength}`);
|
||
|
|
}
|
||
|
|
b.writeHex(buf, record.fingerprint, offset, offset += fingerprintLength);
|
||
|
|
rsshfp.encode.bytes = offset - oldOffset;
|
||
|
|
b.writeUInt16BE(buf, rsshfp.encode.bytes - 2, oldOffset);
|
||
|
|
return buf;
|
||
|
|
},
|
||
|
|
decode(buf, offset) {
|
||
|
|
if (!offset) offset = 0;
|
||
|
|
const oldOffset = offset;
|
||
|
|
const record = {};
|
||
|
|
offset += 2; // Account for the RDLENGTH field
|
||
|
|
record.algorithm = buf[offset];
|
||
|
|
offset += 1;
|
||
|
|
record.hash = buf[offset];
|
||
|
|
offset += 1;
|
||
|
|
const fingerprintLength = getFingerprintLengthForHashType(record.hash);
|
||
|
|
record.fingerprint = b.toHex(buf, offset, offset + fingerprintLength);
|
||
|
|
offset += fingerprintLength;
|
||
|
|
rsshfp.decode.bytes = offset - oldOffset;
|
||
|
|
return record;
|
||
|
|
},
|
||
|
|
encodingLength(record) {
|
||
|
|
return 4 + b.hexLength(record.fingerprint);
|
||
|
|
}
|
||
|
|
});
|
||
|
|
exports.sshfp = rsshfp;
|
||
|
|
function getFingerprintLengthForHashType(hashType) {
|
||
|
|
if (hashType === 1) return 20;
|
||
|
|
if (hashType === 2) return 32;
|
||
|
|
throw new Error(`Invalid hashType=${hashType}, supported=1,2`);
|
||
|
|
}
|
||
|
|
rsshfp.getFingerprintLengthForHashType = getFingerprintLengthForHashType;
|
||
|
|
function renc(type) {
|
||
|
|
switch (type.toUpperCase()) {
|
||
|
|
case 'A':
|
||
|
|
return ra;
|
||
|
|
case 'PTR':
|
||
|
|
return rptr;
|
||
|
|
case 'CNAME':
|
||
|
|
return rptr;
|
||
|
|
case 'DNAME':
|
||
|
|
return rptr;
|
||
|
|
case 'TXT':
|
||
|
|
return rtxt;
|
||
|
|
case 'NULL':
|
||
|
|
return rnull;
|
||
|
|
case 'AAAA':
|
||
|
|
return raaaa;
|
||
|
|
case 'SRV':
|
||
|
|
return rsrv;
|
||
|
|
case 'HINFO':
|
||
|
|
return rhinfo;
|
||
|
|
case 'CAA':
|
||
|
|
return rcaa;
|
||
|
|
case 'NS':
|
||
|
|
return rns;
|
||
|
|
case 'SOA':
|
||
|
|
return rsoa;
|
||
|
|
case 'MX':
|
||
|
|
return rmx;
|
||
|
|
case 'OPT':
|
||
|
|
return ropt;
|
||
|
|
case 'DNSKEY':
|
||
|
|
return rdnskey;
|
||
|
|
case 'RRSIG':
|
||
|
|
return rrrsig;
|
||
|
|
case 'RP':
|
||
|
|
return rrp;
|
||
|
|
case 'NSEC':
|
||
|
|
return rnsec;
|
||
|
|
case 'NSEC3':
|
||
|
|
return rnsec3;
|
||
|
|
case 'SSHFP':
|
||
|
|
return rsshfp;
|
||
|
|
case 'DS':
|
||
|
|
return rds;
|
||
|
|
}
|
||
|
|
return runknown;
|
||
|
|
}
|
||
|
|
const answer = codec({
|
||
|
|
encode(a, buf, offset) {
|
||
|
|
if (!buf) buf = new Uint8Array(answer.encodingLength(a));
|
||
|
|
if (!offset) offset = 0;
|
||
|
|
const oldOffset = offset;
|
||
|
|
name.encode(a.name, buf, offset);
|
||
|
|
offset += name.encode.bytes;
|
||
|
|
b.writeUInt16BE(buf, types.toType(a.type), offset);
|
||
|
|
if (a.type.toUpperCase() === 'OPT') {
|
||
|
|
if (a.name !== '.') {
|
||
|
|
throw new Error('OPT name must be root.');
|
||
|
|
}
|
||
|
|
b.writeUInt16BE(buf, a.udpPayloadSize || 4096, offset + 2);
|
||
|
|
buf[offset + 4] = a.extendedRcode || 0;
|
||
|
|
buf[offset + 5] = a.ednsVersion || 0;
|
||
|
|
b.writeUInt16BE(buf, a.flags || 0, offset + 6);
|
||
|
|
offset += 8;
|
||
|
|
ropt.encode(a.options || [], buf, offset);
|
||
|
|
offset += ropt.encode.bytes;
|
||
|
|
} else {
|
||
|
|
let klass = classes.toClass(a.class === undefined ? 'IN' : a.class);
|
||
|
|
if (a.flush) klass |= FLUSH_MASK; // the 1st bit of the class is the flush bit
|
||
|
|
b.writeUInt16BE(buf, klass, offset + 2);
|
||
|
|
b.writeUInt32BE(buf, a.ttl || 0, offset + 4);
|
||
|
|
offset += 8;
|
||
|
|
const enc = renc(a.type);
|
||
|
|
enc.encode(a.data, buf, offset);
|
||
|
|
offset += enc.encode.bytes;
|
||
|
|
}
|
||
|
|
answer.encode.bytes = offset - oldOffset;
|
||
|
|
return buf;
|
||
|
|
},
|
||
|
|
decode(buf, offset) {
|
||
|
|
if (!offset) offset = 0;
|
||
|
|
const a = {};
|
||
|
|
const oldOffset = offset;
|
||
|
|
a.name = name.decode(buf, offset);
|
||
|
|
offset += name.decode.bytes;
|
||
|
|
a.type = types.toString(b.readUInt16BE(buf, offset));
|
||
|
|
if (a.type === 'OPT') {
|
||
|
|
a.udpPayloadSize = b.readUInt16BE(buf, offset + 2);
|
||
|
|
a.extendedRcode = buf[offset + 4];
|
||
|
|
a.ednsVersion = buf[offset + 5];
|
||
|
|
a.flags = b.readUInt16BE(buf, offset + 6);
|
||
|
|
a.flag_do = (a.flags >> 15 & 0x1) === 1;
|
||
|
|
a.options = ropt.decode(buf, offset + 8);
|
||
|
|
offset += 8 + ropt.decode.bytes;
|
||
|
|
} else {
|
||
|
|
const klass = b.readUInt16BE(buf, offset + 2);
|
||
|
|
a.ttl = b.readUInt32BE(buf, offset + 4);
|
||
|
|
a.class = classes.toString(klass & NOT_FLUSH_MASK);
|
||
|
|
a.flush = !!(klass & FLUSH_MASK);
|
||
|
|
const enc = renc(a.type);
|
||
|
|
a.data = enc.decode(buf, offset + 8);
|
||
|
|
offset += 8 + enc.decode.bytes;
|
||
|
|
}
|
||
|
|
answer.decode.bytes = offset - oldOffset;
|
||
|
|
return a;
|
||
|
|
},
|
||
|
|
encodingLength(a) {
|
||
|
|
const data = a.data !== null && a.data !== undefined ? a.data : a.options;
|
||
|
|
return name.encodingLength(a.name) + 8 + renc(a.type).encodingLength(data);
|
||
|
|
}
|
||
|
|
});
|
||
|
|
exports.answer = answer;
|
||
|
|
const question = codec({
|
||
|
|
encode(q, buf, offset) {
|
||
|
|
if (!buf) buf = new Uint8Array(question.encodingLength(q));
|
||
|
|
if (!offset) offset = 0;
|
||
|
|
const oldOffset = offset;
|
||
|
|
name.encode(q.name, buf, offset);
|
||
|
|
offset += name.encode.bytes;
|
||
|
|
b.writeUInt16BE(buf, types.toType(q.type), offset);
|
||
|
|
offset += 2;
|
||
|
|
b.writeUInt16BE(buf, classes.toClass(q.class === undefined ? 'IN' : q.class), offset);
|
||
|
|
offset += 2;
|
||
|
|
question.encode.bytes = offset - oldOffset;
|
||
|
|
return q;
|
||
|
|
},
|
||
|
|
decode(buf, offset) {
|
||
|
|
if (!offset) offset = 0;
|
||
|
|
const oldOffset = offset;
|
||
|
|
const q = {};
|
||
|
|
q.name = name.decode(buf, offset);
|
||
|
|
offset += name.decode.bytes;
|
||
|
|
q.type = types.toString(b.readUInt16BE(buf, offset));
|
||
|
|
offset += 2;
|
||
|
|
q.class = classes.toString(b.readUInt16BE(buf, offset));
|
||
|
|
offset += 2;
|
||
|
|
const qu = !!(q.class & QU_MASK);
|
||
|
|
if (qu) q.class &= NOT_QU_MASK;
|
||
|
|
question.decode.bytes = offset - oldOffset;
|
||
|
|
return q;
|
||
|
|
},
|
||
|
|
encodingLength(q) {
|
||
|
|
return name.encodingLength(q.name) + 4;
|
||
|
|
}
|
||
|
|
});
|
||
|
|
exports.question = question;
|
||
|
|
const AUTHORITATIVE_ANSWER = 1 << 10;
|
||
|
|
exports.AUTHORITATIVE_ANSWER = AUTHORITATIVE_ANSWER;
|
||
|
|
const TRUNCATED_RESPONSE = 1 << 9;
|
||
|
|
exports.TRUNCATED_RESPONSE = TRUNCATED_RESPONSE;
|
||
|
|
const RECURSION_DESIRED = 1 << 8;
|
||
|
|
exports.RECURSION_DESIRED = RECURSION_DESIRED;
|
||
|
|
const RECURSION_AVAILABLE = 1 << 7;
|
||
|
|
exports.RECURSION_AVAILABLE = RECURSION_AVAILABLE;
|
||
|
|
const AUTHENTIC_DATA = 1 << 5;
|
||
|
|
exports.AUTHENTIC_DATA = AUTHENTIC_DATA;
|
||
|
|
const CHECKING_DISABLED = 1 << 4;
|
||
|
|
exports.CHECKING_DISABLED = CHECKING_DISABLED;
|
||
|
|
const DNSSEC_OK = 1 << 15;
|
||
|
|
exports.DNSSEC_OK = DNSSEC_OK;
|
||
|
|
const packet = {
|
||
|
|
encode: function (result, buf, offset) {
|
||
|
|
const allocing = !buf;
|
||
|
|
if (allocing) buf = new Uint8Array(encodingLength(result));
|
||
|
|
if (!offset) offset = 0;
|
||
|
|
const oldOffset = offset;
|
||
|
|
if (!result.questions) result.questions = [];
|
||
|
|
if (!result.answers) result.answers = [];
|
||
|
|
if (!result.authorities) result.authorities = [];
|
||
|
|
if (!result.additionals) result.additionals = [];
|
||
|
|
header.encode(result, buf, offset);
|
||
|
|
offset += header.encode.bytes;
|
||
|
|
offset = encodeList(result.questions, question, buf, offset);
|
||
|
|
offset = encodeList(result.answers, answer, buf, offset);
|
||
|
|
offset = encodeList(result.authorities, answer, buf, offset);
|
||
|
|
offset = encodeList(result.additionals, answer, buf, offset);
|
||
|
|
packet.encode.bytes = offset - oldOffset;
|
||
|
|
|
||
|
|
// just a quick sanity check
|
||
|
|
if (allocing && encode.bytes !== buf.length) {
|
||
|
|
return buf.slice(0, encode.bytes);
|
||
|
|
}
|
||
|
|
return buf;
|
||
|
|
},
|
||
|
|
decode: function (buf, offset) {
|
||
|
|
if (!offset) offset = 0;
|
||
|
|
const oldOffset = offset;
|
||
|
|
const result = header.decode(buf, offset);
|
||
|
|
offset += header.decode.bytes;
|
||
|
|
offset = decodeList(result.questions, question, buf, offset);
|
||
|
|
offset = decodeList(result.answers, answer, buf, offset);
|
||
|
|
offset = decodeList(result.authorities, answer, buf, offset);
|
||
|
|
offset = decodeList(result.additionals, answer, buf, offset);
|
||
|
|
packet.decode.bytes = offset - oldOffset;
|
||
|
|
return result;
|
||
|
|
},
|
||
|
|
encodingLength: function (result) {
|
||
|
|
return header.encodingLength(result) + encodingLengthList(result.questions || [], question) + encodingLengthList(result.answers || [], answer) + encodingLengthList(result.authorities || [], answer) + encodingLengthList(result.additionals || [], answer);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
exports.packet = packet;
|
||
|
|
packet.encode.bytes = 0;
|
||
|
|
packet.decode.bytes = 0;
|
||
|
|
function sanitizeSingle(input, type) {
|
||
|
|
if (input.questions) {
|
||
|
|
throw new Error('Only one .question object expected instead of a .questions array!');
|
||
|
|
}
|
||
|
|
const sanitized = Object.assign({
|
||
|
|
type
|
||
|
|
}, input);
|
||
|
|
if (sanitized.question) {
|
||
|
|
sanitized.questions = [sanitized.question];
|
||
|
|
delete sanitized.question;
|
||
|
|
}
|
||
|
|
return sanitized;
|
||
|
|
}
|
||
|
|
const query = {
|
||
|
|
encode: function (result, buf, offset) {
|
||
|
|
buf = packet.encode(sanitizeSingle(result, 'query'), buf, offset);
|
||
|
|
query.encode.bytes = packet.encode.bytes;
|
||
|
|
return buf;
|
||
|
|
},
|
||
|
|
decode: function (buf, offset) {
|
||
|
|
const res = packet.decode(buf, offset);
|
||
|
|
query.decode.bytes = packet.decode.bytes;
|
||
|
|
if (res.questions) {
|
||
|
|
res.question = res.questions[0];
|
||
|
|
delete res.questions;
|
||
|
|
}
|
||
|
|
return res;
|
||
|
|
},
|
||
|
|
encodingLength: function (result) {
|
||
|
|
return packet.encodingLength(sanitizeSingle(result, 'query'));
|
||
|
|
}
|
||
|
|
};
|
||
|
|
exports.query = query;
|
||
|
|
query.encode.bytes = 0;
|
||
|
|
query.decode.bytes = 0;
|
||
|
|
const response = {
|
||
|
|
encode: function (result, buf, offset) {
|
||
|
|
buf = packet.encode(sanitizeSingle(result, 'response'), buf, offset);
|
||
|
|
response.encode.bytes = packet.encode.bytes;
|
||
|
|
return buf;
|
||
|
|
},
|
||
|
|
decode: function (buf, offset) {
|
||
|
|
const res = packet.decode(buf, offset);
|
||
|
|
response.decode.bytes = packet.decode.bytes;
|
||
|
|
if (res.questions) {
|
||
|
|
res.question = res.questions[0];
|
||
|
|
delete res.questions;
|
||
|
|
}
|
||
|
|
return res;
|
||
|
|
},
|
||
|
|
encodingLength: function (result) {
|
||
|
|
return packet.encodingLength(sanitizeSingle(result, 'response'));
|
||
|
|
}
|
||
|
|
};
|
||
|
|
exports.response = response;
|
||
|
|
response.encode.bytes = 0;
|
||
|
|
response.decode.bytes = 0;
|
||
|
|
const encode = packet.encode;
|
||
|
|
exports.encode = encode;
|
||
|
|
const decode = packet.decode;
|
||
|
|
exports.decode = decode;
|
||
|
|
const encodingLength = packet.encodingLength;
|
||
|
|
exports.encodingLength = encodingLength;
|
||
|
|
function streamEncode(result) {
|
||
|
|
const buf = encode(result);
|
||
|
|
const combine = new Uint8Array(2 + buf.byteLength);
|
||
|
|
b.writeUInt16BE(combine, buf.byteLength);
|
||
|
|
b.copy(buf, combine, 2, 0, buf.length);
|
||
|
|
streamEncode.bytes = combine.byteLength;
|
||
|
|
return combine;
|
||
|
|
}
|
||
|
|
streamEncode.bytes = 0;
|
||
|
|
function streamDecode(sbuf) {
|
||
|
|
const len = b.readUInt16BE(sbuf, 0);
|
||
|
|
if (sbuf.byteLength < len + 2) {
|
||
|
|
// not enough data
|
||
|
|
return null;
|
||
|
|
}
|
||
|
|
const result = decode(sbuf.slice(2));
|
||
|
|
streamDecode.bytes = decode.bytes;
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
streamDecode.bytes = 0;
|
||
|
|
function encodingLengthList(list, enc) {
|
||
|
|
let len = 0;
|
||
|
|
for (let i = 0; i < list.length; i++) len += enc.encodingLength(list[i]);
|
||
|
|
return len;
|
||
|
|
}
|
||
|
|
function encodeList(list, enc, buf, offset) {
|
||
|
|
for (let i = 0; i < list.length; i++) {
|
||
|
|
enc.encode(list[i], buf, offset);
|
||
|
|
offset += enc.encode.bytes;
|
||
|
|
}
|
||
|
|
return offset;
|
||
|
|
}
|
||
|
|
function decodeList(list, enc, buf, offset) {
|
||
|
|
for (let i = 0; i < list.length; i++) {
|
||
|
|
list[i] = enc.decode(buf, offset);
|
||
|
|
offset += enc.decode.bytes;
|
||
|
|
}
|
||
|
|
return offset;
|
||
|
|
}
|