whitespace fix
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parent
ad81b6c339
commit
c974cb7039
104
server.js
104
server.js
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@ -16,10 +16,10 @@ app.use('/api', express.json());
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app.get('/api/dns/:domain', function (req, res, next) {
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var domain = req.params.domain;
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var casedDomain = domain.toLowerCase().split('').map(function (ch) {
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// dns0x20 takes advantage of the fact that the binary operation for toUpperCase is
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// ch = ch | 0x20;
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return Math.round(Math.random()) % 2 ? ch : ch.toUpperCase();
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}).join('');
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// dns0x20 takes advantage of the fact that the binary operation for toUpperCase is
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// ch = ch | 0x20;
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return Math.round(Math.random()) % 2 ? ch : ch.toUpperCase();
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}).join('');
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var typ = req.query.type;
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var query = {
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header: {
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@ -40,60 +40,60 @@ app.get('/api/dns/:domain', function (req, res, next) {
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}
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]
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};
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var opts = {
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var opts = {
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onError: function (err) {
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next(err);
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}
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next(err);
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}
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, onMessage: function (packet) {
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var fail0x20;
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var fail0x20;
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if (packet.id !== query.id) {
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console.error('[SECURITY] ignoring packet for \'' + packet.question[0].name + '\' due to mismatched id');
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console.error(packet);
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return;
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}
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if (packet.id !== query.id) {
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console.error('[SECURITY] ignoring packet for \'' + packet.question[0].name + '\' due to mismatched id');
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console.error(packet);
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return;
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}
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packet.question.forEach(function (q) {
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// if (-1 === q.name.lastIndexOf(cli.casedQuery))
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if (q.name !== casedDomain) {
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fail0x20 = q.name;
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}
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});
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packet.question.forEach(function (q) {
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// if (-1 === q.name.lastIndexOf(cli.casedQuery))
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if (q.name !== casedDomain) {
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fail0x20 = q.name;
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}
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});
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[ 'question', 'answer', 'authority', 'additional' ].forEach(function (group) {
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(packet[group]||[]).forEach(function (a) {
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var an = a.name;
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var i = domain.toLowerCase().lastIndexOf(a.name.toLowerCase()); // answer is something like ExAMPle.cOM and query was wWw.ExAMPle.cOM
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var j = a.name.toLowerCase().lastIndexOf(domain.toLowerCase()); // answer is something like www.ExAMPle.cOM and query was ExAMPle.cOM
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[ 'question', 'answer', 'authority', 'additional' ].forEach(function (group) {
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(packet[group]||[]).forEach(function (a) {
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var an = a.name;
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var i = domain.toLowerCase().lastIndexOf(a.name.toLowerCase()); // answer is something like ExAMPle.cOM and query was wWw.ExAMPle.cOM
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var j = a.name.toLowerCase().lastIndexOf(domain.toLowerCase()); // answer is something like www.ExAMPle.cOM and query was ExAMPle.cOM
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// it's important to note that these should only relpace changes in casing that we expected
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// any abnormalities should be left intact to go "huh?" about
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// TODO detect abnormalities?
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if (-1 !== i) {
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// "EXamPLE.cOm".replace("wWw.EXamPLE.cOm".substr(4), "www.example.com".substr(4))
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a.name = a.name.replace(casedDomain.substr(i), domain.substr(i));
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} else if (-1 !== j) {
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// "www.example.com".replace("EXamPLE.cOm", "example.com")
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a.name = a.name.substr(0, j) + a.name.substr(j).replace(casedDomain, domain);
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}
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// it's important to note that these should only relpace changes in casing that we expected
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// any abnormalities should be left intact to go "huh?" about
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// TODO detect abnormalities?
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if (-1 !== i) {
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// "EXamPLE.cOm".replace("wWw.EXamPLE.cOm".substr(4), "www.example.com".substr(4))
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a.name = a.name.replace(casedDomain.substr(i), domain.substr(i));
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} else if (-1 !== j) {
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// "www.example.com".replace("EXamPLE.cOm", "example.com")
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a.name = a.name.substr(0, j) + a.name.substr(j).replace(casedDomain, domain);
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}
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// NOTE: right now this assumes that anything matching the query matches all the way to the end
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// it does not handle the case of a record for example.com.uk being returned in response to a query for www.example.com correctly
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// (but I don't think it should need to)
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if (a.name.length !== an.length) {
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console.error("[ERROR] question / answer mismatch: '" + an + "' != '" + a.length + "'");
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console.error(a);
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}
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});
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});
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// NOTE: right now this assumes that anything matching the query matches all the way to the end
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// it does not handle the case of a record for example.com.uk being returned in response to a query for www.example.com correctly
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// (but I don't think it should need to)
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if (a.name.length !== an.length) {
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console.error("[ERROR] question / answer mismatch: '" + an + "' != '" + a.length + "'");
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console.error(a);
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}
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});
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});
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if (fail0x20) {
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console.warn(";; Warning: DNS 0x20 security not implemented (or packet spoofed). Queried '"
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+ casedDomain + "' but got response for '" + fail0x20 + "'.");
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return;
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}
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if (fail0x20) {
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console.warn(";; Warning: DNS 0x20 security not implemented (or packet spoofed). Queried '"
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+ casedDomain + "' but got response for '" + fail0x20 + "'.");
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return;
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}
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res.send({
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res.send({
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header: packet.header
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, question: packet.question
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, answer: packet.answer
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@ -101,12 +101,12 @@ app.get('/api/dns/:domain', function (req, res, next) {
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, additional: packet.additional
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, edns_options: packet.edns_options
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});
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}
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}
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, onListening: function () {}
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, onSent: function (/*res*/) { }
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, onTimeout: function (res) {
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console.error('dns timeout:', res);
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next(new Error("DNS timeout - no response"));
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console.error('dns timeout:', res);
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next(new Error("DNS timeout - no response"));
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}
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, onClose: function () { }
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//, mdns: cli.mdns
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