/*
* vim: ts=4:sw=4:expandtab
*/
var TextSecureServer = (function() {
'use strict';
function validateResponse(response, schema) {
try {
for (var i in schema) {
switch (schema[i]) {
case 'object':
case 'string':
case 'number':
if (typeof response[i] !== schema[i]) {
return false;
}
break;
}
}
} catch(ex) {
return false;
}
return true;
}
// Promise-based async xhr routine
function promise_ajax(url, options) {
return new Promise(function (resolve, reject) {
console.log(options.type, url);
var xhr = new XMLHttpRequest();
xhr.open(options.type, url, true /*async*/);
if ( options.responseType ) {
xhr[ 'responseType' ] = options.responseType;
}
if (options.user && options.password) {
xhr.setRequestHeader("Authorization", "Basic " + btoa(getString(options.user) + ":" + getString(options.password)));
}
if (options.contentType) {
xhr.setRequestHeader( "Content-Type", options.contentType );
}
xhr.onload = function() {
var result = xhr.response;
if ( (!xhr.responseType || xhr.responseType === "text") &&
typeof xhr.responseText === "string" ) {
result = xhr.responseText;
}
if (options.dataType === 'json') {
try { result = JSON.parse(xhr.responseText + ''); } catch(e) {}
if (options.validateResponse) {
if (!validateResponse(result, options.validateResponse)) {
console.log(options.type, url, xhr.status, 'Error');
reject(HTTPError(xhr.status, result, options.stack));
}
}
}
if ( 0 <= xhr.status && xhr.status < 400) {
console.log(options.type, url, xhr.status, 'Success');
resolve(result, xhr.status);
} else {
console.log(options.type, url, xhr.status, 'Error');
reject(HTTPError(xhr.status, result, options.stack));
}
};
xhr.onerror = function() {
console.log(options.type, url, xhr.status, 'Error');
reject(HTTPError(xhr.status, null, options.stack));
};
xhr.send( options.data || null );
});
}
function ajax(url, options) {
options.stack = new Error().stack; // just in case, save stack here.
var count = 3;
function retry(e) {
if (e.name === 'HTTPError' && e.code === -1 && count > 0) {
count = count - 1;
return new Promise(function(resolve) {
setTimeout(function() {
resolve(promise_ajax(url, options).catch(retry));
}, 1000 );
});
} else {
throw e;
}
}
return promise_ajax(url, options).catch(retry);
}
function HTTPError(code, response, stack) {
if (code > 999 || code < 100) {
code = -1;
}
var e = new Error();
e.name = 'HTTPError';
e.code = code;
e.stack = stack;
if (response) {
e.response = response;
}
return e;
}
var URL_CALLS = {
accounts : "/v1/accounts",
devices : "/v1/devices",
keys : "/v2/keys",
messages : "/v1/messages",
attachment : "/v1/attachments"
};
function TextSecureServer(url, username, password, attachment_server_url) {
if (typeof url !== 'string') {
throw new Error('Invalid server url');
}
this.url = url;
this.username = username;
this.password = password;
this.attachment_id_regex = RegExp("^https:\/\/.*\/(\\d+)\?");
if (attachment_server_url) {
// strip trailing /
attachment_server_url = attachment_server_url.replace(/\/$/,'');
// and escape
attachment_server_url = attachment_server_url.replace(/[-\/\\^$*+?.()|[\]{}]/g, '\\$&');
this.attachment_id_regex = RegExp( "^" + attachment_server_url + "\/(\\d+)\?");
}
}
TextSecureServer.prototype = {
constructor: TextSecureServer,
ajax: function(param) {
if (!param.urlParameters) {
param.urlParameters = '';
}
return ajax(this.url + URL_CALLS[param.call] + param.urlParameters, {
type : param.httpType,
data : param.jsonData && textsecure.utils.jsonThing(param.jsonData),
contentType : 'application/json; charset=utf-8',
dataType : 'json',
user : this.username,
password : this.password,
validateResponse: param.validateResponse
}).catch(function(e) {
var code = e.code;
if (code === 200) {
// happens sometimes when we get no response
// (TODO: Fix server to return 204? instead)
return null;
}
var message;
switch (code) {
case -1:
message = "Failed to connect to the server, please check your network connection.";
break;
case 413:
message = "Rate limit exceeded, please try again later.";
break;
case 403:
message = "Invalid code, please try again.";
break;
case 417:
// TODO: This shouldn't be a thing?, but its in the API doc?
message = "Number already registered.";
break;
case 401:
message = "Invalid authentication, most likely someone re-registered and invalidated our registration.";
break;
case 404:
message = "Number is not registered.";
break;
default:
message = "The server rejected our query, please file a bug report.";
}
e.message = message
throw e;
});
},
requestVerificationSMS: function(number) {
return this.ajax({
call : 'accounts',
httpType : 'GET',
urlParameters : '/sms/code/' + number,
});
},
requestVerificationVoice: function(number) {
return this.ajax({
call : 'accounts',
httpType : 'GET',
urlParameters : '/voice/code/' + number,
});
},
confirmCode: function(number, code, password, signaling_key, registrationId, deviceName) {
var jsonData = {
signalingKey : btoa(getString(signaling_key)),
supportsSms : false,
fetchesMessages : true,
registrationId : registrationId,
};
var call, urlPrefix, schema;
if (deviceName) {
jsonData.name = deviceName;
call = 'devices';
urlPrefix = '/';
schema = { deviceId: 'number' };
} else {
call = 'accounts';
urlPrefix = '/code/';
}
this.username = number;
this.password = password;
return this.ajax({
call : call,
httpType : 'PUT',
urlParameters : urlPrefix + code,
jsonData : jsonData,
validateResponse : schema
});
},
getDevices: function(number) {
return this.ajax({
call : 'devices',
httpType : 'GET',
});
},
registerKeys: function(genKeys) {
var keys = {};
keys.identityKey = btoa(getString(genKeys.identityKey));
keys.signedPreKey = {
keyId: genKeys.signedPreKey.keyId,
publicKey: btoa(getString(genKeys.signedPreKey.publicKey)),
signature: btoa(getString(genKeys.signedPreKey.signature))
};
keys.preKeys = [];
var j = 0;
for (var i in genKeys.preKeys) {
keys.preKeys[j++] = {
keyId: genKeys.preKeys[i].keyId,
publicKey: btoa(getString(genKeys.preKeys[i].publicKey))
};
}
// This is just to make the server happy
// (v2 clients should choke on publicKey)
keys.lastResortKey = {keyId: 0x7fffFFFF, publicKey: btoa("42")};
return this.ajax({
call : 'keys',
httpType : 'PUT',
jsonData : keys,
});
},
getMyKeys: function(number, deviceId) {
return this.ajax({
call : 'keys',
httpType : 'GET',
validateResponse : {count: 'number'}
}).then(function(res) {
return res.count;
});
},
getKeysForNumber: function(number, deviceId) {
if (deviceId === undefined)
deviceId = "*";
return this.ajax({
call : 'keys',
httpType : 'GET',
urlParameters : "/" + number + "/" + deviceId,
validateResponse : {identityKey: 'string', devices: 'object'}
}).then(function(res) {
if (res.devices.constructor !== Array) {
throw new Error("Invalid response");
}
res.identityKey = StringView.base64ToBytes(res.identityKey);
for (var i = 0; i < res.devices.length; i++) {
if ( !validateResponse(res.devices[i], {signedPreKey: 'object', preKey: 'object'}) ||
!validateResponse(res.devices[i].signedPreKey, {publicKey: 'string', signature: 'string'}) ||
!validateResponse(res.devices[i].preKey, {publicKey: 'string'})) {
throw new Error("Invalid response");
}
res.devices[i].signedPreKey.publicKey = StringView.base64ToBytes(res.devices[i].signedPreKey.publicKey);
res.devices[i].signedPreKey.signature = StringView.base64ToBytes(res.devices[i].signedPreKey.signature);
res.devices[i].preKey.publicKey = StringView.base64ToBytes(res.devices[i].preKey.publicKey);
}
return res;
});
},
sendMessages: function(destination, messageArray, timestamp) {
var jsonData = { messages: messageArray, timestamp: timestamp};
return this.ajax({
call : 'messages',
httpType : 'PUT',
urlParameters : '/' + destination,
jsonData : jsonData,
});
},
getAttachment: function(id) {
return this.ajax({
call : 'attachment',
httpType : 'GET',
urlParameters : '/' + id,
validateResponse : {location: 'string'}
}).then(function(response) {
var match = response.location.match(this.attachment_id_regex);
if (!match) {
throw new Error('Received invalid attachment url: ' + response.location);
}
return ajax(response.location, {
type : "GET",
responseType: "arraybuffer",
contentType : "application/octet-stream"
});
}.bind(this));
},
putAttachment: function(encryptedBin) {
return this.ajax({
call : 'attachment',
httpType : 'GET',
}).then(function(response) {
// Extract the id as a string from the location url
// (workaround for ids too large for Javascript numbers)
var match = response.location.match(this.attachment_id_regex);
if (!match) {
throw new Error('Received invalid attachment url: ' + response.location);
}
return ajax(response.location, {
type : "PUT",
contentType : "application/octet-stream",
data : encryptedBin,
processData : false,
}).then(function() {
return match[1];
}.bind(this));
}.bind(this));
},
getMessageSocket: function() {
return new WebSocket(
this.url.replace('https://', 'wss://')
.replace('http://', 'ws://')
+ '/v1/websocket/?login=' + encodeURIComponent(this.username)
+ '&password=' + encodeURIComponent(this.password)
);
},
getProvisioningSocket: function () {
return new WebSocket(
this.url.replace('https://', 'wss://')
.replace('http://', 'ws://')
+ '/v1/websocket/provisioning/'
);
}
};
return TextSecureServer;
})();