113 lines
2.4 KiB
JavaScript
113 lines
2.4 KiB
JavaScript
var createHash = require('crypto').createHash;
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function get_header(header, credentials, opts) {
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var type = header.split(' ')[0],
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user = credentials[0],
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pass = credentials[1];
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if (type == 'Digest') {
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return digest.generate(header, user, pass, opts.method, opts.path);
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} else if (type == 'Basic') {
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return basic(user, pass);
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}
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}
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////////////////////
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// basic
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function md5(string) {
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return createHash('md5').update(string).digest('hex');
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}
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function basic(user, pass) {
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var str = typeof pass == 'undefined' ? user : [user, pass].join(':');
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return 'Basic ' + Buffer.from(str).toString('base64');
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}
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////////////////////
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// digest
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// logic inspired from https://github.com/simme/node-http-digest-client
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var digest = {};
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digest.parse_header = function(header) {
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var challenge = {},
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matches = header.match(/([a-z0-9_-]+)="?([a-z0-9_=\/\.@\s-\+)()]+)"?/gi);
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for (var i = 0, l = matches.length; i < l; i++) {
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var parts = matches[i].split('='),
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key = parts.shift(),
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val = parts.join('=').replace(/^"/, '').replace(/"$/, '');
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challenge[key] = val;
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}
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return challenge;
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}
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digest.update_nc = function(nc) {
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var max = 99999999;
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nc++;
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if (nc > max)
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nc = 1;
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var padding = new Array(8).join('0') + '';
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nc = nc + '';
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return padding.substr(0, 8 - nc.length) + nc;
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}
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digest.generate = function(header, user, pass, method, path) {
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var nc = 1,
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cnonce = null,
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challenge = digest.parse_header(header);
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var ha1 = md5(user + ':' + challenge.realm + ':' + pass),
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ha2 = md5(method.toUpperCase() + ':' + path),
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resp = [ha1, challenge.nonce];
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if (typeof challenge.qop === 'string') {
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cnonce = md5(Math.random().toString(36)).substr(0, 8);
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nc = digest.update_nc(nc);
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resp = resp.concat(nc, cnonce);
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resp = resp.concat(challenge.qop, ha2);
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} else {
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resp = resp.concat(ha2);
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}
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var params = {
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uri : path,
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realm : challenge.realm,
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nonce : challenge.nonce,
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username : user,
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response : md5(resp.join(':'))
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}
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if (challenge.qop) {
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params.qop = challenge.qop;
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}
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if (challenge.opaque) {
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params.opaque = challenge.opaque;
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}
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if (cnonce) {
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params.nc = nc;
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params.cnonce = cnonce;
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}
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header = []
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for (var k in params)
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header.push(k + '="' + params[k] + '"')
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return 'Digest ' + header.join(', ');
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}
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module.exports = {
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header : get_header,
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basic : basic,
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digest : digest.generate
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}
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