Current File : //usr/lib/node_modules/npm/node_modules/oauth-sign/index.js
var crypto = require('crypto')
function sha (key, body, algorithm) {
return crypto.createHmac(algorithm, key).update(body).digest('base64')
}
function rsa (key, body) {
return crypto.createSign('RSA-SHA1').update(body).sign(key, 'base64')
}
function rfc3986 (str) {
return encodeURIComponent(str)
.replace(/!/g,'%21')
.replace(/\*/g,'%2A')
.replace(/\(/g,'%28')
.replace(/\)/g,'%29')
.replace(/'/g,'%27')
}
// Maps object to bi-dimensional array
// Converts { foo: 'A', bar: [ 'b', 'B' ]} to
// [ ['foo', 'A'], ['bar', 'b'], ['bar', 'B'] ]
function map (obj) {
var key, val, arr = []
for (key in obj) {
val = obj[key]
if (Array.isArray(val))
for (var i = 0; i < val.length; i++)
arr.push([key, val[i]])
else if (typeof val === 'object')
for (var prop in val)
arr.push([key + '[' + prop + ']', val[prop]])
else
arr.push([key, val])
}
return arr
}
// Compare function for sort
function compare (a, b) {
return a > b ? 1 : a < b ? -1 : 0
}
function generateBase (httpMethod, base_uri, params) {
// adapted from https://dev.twitter.com/docs/auth/oauth and
// https://dev.twitter.com/docs/auth/creating-signature
// Parameter normalization
// http://tools.ietf.org/html/rfc5849#section-3.4.1.3.2
var normalized = map(params)
// 1. First, the name and value of each parameter are encoded
.map(function (p) {
return [ rfc3986(p[0]), rfc3986(p[1] || '') ]
})
// 2. The parameters are sorted by name, using ascending byte value
// ordering. If two or more parameters share the same name, they
// are sorted by their value.
.sort(function (a, b) {
return compare(a[0], b[0]) || compare(a[1], b[1])
})
// 3. The name of each parameter is concatenated to its corresponding
// value using an "=" character (ASCII code 61) as a separator, even
// if the value is empty.
.map(function (p) { return p.join('=') })
// 4. The sorted name/value pairs are concatenated together into a
// single string by using an "&" character (ASCII code 38) as
// separator.
.join('&')
var base = [
rfc3986(httpMethod ? httpMethod.toUpperCase() : 'GET'),
rfc3986(base_uri),
rfc3986(normalized)
].join('&')
return base
}
function hmacsign (httpMethod, base_uri, params, consumer_secret, token_secret) {
var base = generateBase(httpMethod, base_uri, params)
var key = [
consumer_secret || '',
token_secret || ''
].map(rfc3986).join('&')
return sha(key, base, 'sha1')
}
function hmacsign256 (httpMethod, base_uri, params, consumer_secret, token_secret) {
var base = generateBase(httpMethod, base_uri, params)
var key = [
consumer_secret || '',
token_secret || ''
].map(rfc3986).join('&')
return sha(key, base, 'sha256')
}
function rsasign (httpMethod, base_uri, params, private_key, token_secret) {
var base = generateBase(httpMethod, base_uri, params)
var key = private_key || ''
return rsa(key, base)
}
function plaintext (consumer_secret, token_secret) {
var key = [
consumer_secret || '',
token_secret || ''
].map(rfc3986).join('&')
return key
}
function sign (signMethod, httpMethod, base_uri, params, consumer_secret, token_secret) {
var method
var skipArgs = 1
switch (signMethod) {
case 'RSA-SHA1':
method = rsasign
break
case 'HMAC-SHA1':
method = hmacsign
break
case 'HMAC-SHA256':
method = hmacsign256
break
case 'PLAINTEXT':
method = plaintext
skipArgs = 4
break
default:
throw new Error('Signature method not supported: ' + signMethod)
}
return method.apply(null, [].slice.call(arguments, skipArgs))
}
exports.hmacsign = hmacsign
exports.hmacsign256 = hmacsign256
exports.rsasign = rsasign
exports.plaintext = plaintext
exports.sign = sign
exports.rfc3986 = rfc3986
exports.generateBase = generateBase
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