7820380e
 “wangming”
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var createHash = require('crypto').createHash;
function get_header(header, credentials, opts) {
var type = header.split(' ')[0],
user = credentials[0],
pass = credentials[1];
if (type == 'Digest') {
return digest.generate(header, user, pass, opts.method, opts.path);
} else if (type == 'Basic') {
return basic(user, pass);
}
}
////////////////////
// basic
function md5(string) {
return createHash('md5').update(string).digest('hex');
}
function basic(user, pass) {
var str = typeof pass == 'undefined' ? user : [user, pass].join(':');
return 'Basic ' + Buffer.from(str).toString('base64');
}
////////////////////
// digest
// logic inspired from https://github.com/simme/node-http-digest-client
var digest = {};
digest.parse_header = function(header) {
var challenge = {},
matches = header.match(/([a-z0-9_-]+)="?([a-z0-9_=\/\.@\s-\+:)()]+)"?/gi);
for (var i = 0, l = matches.length; i < l; i++) {
var parts = matches[i].split('='),
key = parts.shift(),
val = parts.join('=').replace(/^"/, '').replace(/"$/, '');
challenge[key] = val;
}
return challenge;
}
digest.update_nc = function(nc) {
var max = 99999999;
nc++;
if (nc > max)
nc = 1;
var padding = new Array(8).join('0') + '';
nc = nc + '';
return padding.substr(0, 8 - nc.length) + nc;
}
digest.generate = function(header, user, pass, method, path) {
var nc = 1,
cnonce = null,
challenge = digest.parse_header(header);
var ha1 = md5(user + ':' + challenge.realm + ':' + pass),
ha2 = md5(method.toUpperCase() + ':' + path),
resp = [ha1, challenge.nonce];
if (typeof challenge.qop === 'string') {
cnonce = md5(Math.random().toString(36)).substr(0, 8);
nc = digest.update_nc(nc);
resp = resp.concat(nc, cnonce);
resp = resp.concat(challenge.qop, ha2);
} else {
resp = resp.concat(ha2);
}
var params = {
uri : path,
realm : challenge.realm,
nonce : challenge.nonce,
username : user,
response : md5(resp.join(':'))
}
if (challenge.qop) {
params.qop = challenge.qop;
}
if (challenge.opaque) {
params.opaque = challenge.opaque;
}
if (cnonce) {
params.nc = nc;
params.cnonce = cnonce;
}
header = []
for (var k in params)
header.push(k + '="' + params[k] + '"')
return 'Digest ' + header.join(', ');
}
module.exports = {
header : get_header,
basic : basic,
digest : digest.generate
}
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