dns-packet-typescript/dist/rnsec3.js

An abstract-encoding compliant module for encoding / decoding DNS packets

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.encodingLength = exports.decode = exports.encode = void 0;
var typebitmap = require("./typebitmap");
function encode(record, buf, offset) {
    if (offset === void 0) { offset = 0; }
    if (!buf) {
        buf = Buffer.allocUnsafe(encodingLength(record));
    }
    if (!offset) {
        offset = 0;
    }
    var oldOffset = offset;
    var salt = record.salt;
    if (!Buffer.isBuffer(salt)) {
        throw new Error('salt must be a Buffer');
    }
    var nextDomain = record.nextDomain;
    if (!Buffer.isBuffer(nextDomain)) {
        throw new Error('nextDomain must be a Buffer');
    }
    offset += 2; // Leave space for length
    buf.writeUInt8(record.algorithm, offset);
    offset += 1;
    buf.writeUInt8(record.flags, offset);
    offset += 1;
    buf.writeUInt16BE(record.iterations, offset);
    offset += 2;
    buf.writeUInt8(salt.length, offset);
    offset += 1;
    salt.copy(buf, offset, 0, salt.length);
    offset += salt.length;
    buf.writeUInt8(nextDomain.length, offset);
    offset += 1;
    nextDomain.copy(buf, offset, 0, nextDomain.length);
    offset += nextDomain.length;
    typebitmap.encode(record.rrtypes, buf, offset);
    offset += typebitmap.encode.bytes;
    encode.bytes = offset - oldOffset;
    buf.writeUInt16BE(encode.bytes - 2, oldOffset);
    return buf;
}
exports.encode = encode;
encode.bytes = 0;
function decode(buf, offset) {
    if (offset === void 0) { offset = 0; }
    if (!offset) {
        offset = 0;
    }
    var oldOffset = offset;
    var record = {};
    var length = buf.readUInt16BE(offset);
    offset += 2;
    record.algorithm = buf.readUInt8(offset);
    offset += 1;
    record.flags = buf.readUInt8(offset);
    offset += 1;
    record.iterations = buf.readUInt16BE(offset);
    offset += 2;
    var saltLength = buf.readUInt8(offset);
    offset += 1;
    record.salt = buf.slice(offset, offset + saltLength);
    offset += saltLength;
    var hashLength = buf.readUInt8(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;
    decode.bytes = offset - oldOffset;
    return record;
}
exports.decode = decode;
decode.bytes = 0;
function encodingLength(record) {
    return 8 +
        record.salt.length +
        record.nextDomain.length +
        typebitmap.encodingLength(record.rrtypes);
}
exports.encodingLength = encodingLength;
//# sourceMappingURL=rnsec3.js.map