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Cable-Desktop/libtextsecure/sendmessage.js
lilia 816a206892 Refactor sendMessageToDevices 
Split into separate encrypt and transmit functions. Let the encryption
function also handle all wire formatting (ie, jsonification and base64
encoding), which simplifes TextSecureServer.sendMessages, removes a
TODO, and lets us save fewer params to make network errors replayable.

// FREEBIE
2015-10-10 16:36:30 -07:00

455 lines
20 KiB
JavaScript
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/*
* vim: ts=4:sw=4:expandtab
*/
function MessageSender(url, username, password) {
this.server = new TextSecureServer(url, username, password);
}
MessageSender.prototype = {
constructor: MessageSender,
// message == DataMessage or ContentMessage proto
encryptToDevices: function(timestamp, number, deviceObjectList, message) {
var legacy = (message instanceof textsecure.protobuf.DataMessage);
var relay = deviceObjectList[0].relay;
for (var i=1; i < deviceObjectList.length; ++i) {
if (deviceObjectList[i].relay !== relay) {
throw new Error("Mismatched relays for number " + number);
}
}
return Promise.all(deviceObjectList.map(function(device) {
return textsecure.protocol_wrapper.encryptMessageFor(device, message).then(function(encryptedMsg) {
return textsecure.protocol_wrapper.getRegistrationId(device.encodedNumber).then(function(registrationId) {
return textsecure.storage.devices.removeTempKeysFromDevice(device.encodedNumber).then(function() {
var json = {
type: encryptedMsg.type,
destinationDeviceId: textsecure.utils.unencodeNumber(device.encodedNumber)[1],
destinationRegistrationId: registrationId,
timestamp: timestamp
};
if (device.relay !== undefined) {
json.relay = device.relay;
}
var content = btoa(encryptedMsg.body);
if (legacy) {
json.body = content;
} else {
json.content = content;
}
return json;
});
});
});
}));
},
transmitMessage: function(number, jsonData) {
return this.server.sendMessages(number, jsonData).catch(function(e) {
if (e.name === 'HTTPError' && (e.code !== 409 && e.code !== 410)) {
// 409 and 410 should bubble and be handled by doSendMessage
// all other network errors can be retried later.
throw new textsecure.SendMessageNetworkError(number, jsonData, e);
}
throw e;
});
},
makeAttachmentPointer: function(attachment) {
if (typeof attachment !== 'object' || attachment == null) {
return Promise.resolve(undefined);
}
var proto = new textsecure.protobuf.AttachmentPointer();
proto.key = textsecure.crypto.getRandomBytes(64);
var iv = textsecure.crypto.getRandomBytes(16);
return textsecure.crypto.encryptAttachment(attachment.data, proto.key, iv).then(function(encryptedBin) {
return this.server.putAttachment(encryptedBin).then(function(id) {
proto.id = id;
proto.contentType = attachment.contentType;
return proto;
});
}.bind(this));
},
tryMessageAgain: function(number, encodedMessage, timestamp) {
var proto = textsecure.protobuf.DataMessage.decode(encodedMessage);
return this.sendIndividualProto(number, proto, timestamp);
},
sendMessageProto: function(timestamp, numbers, message, callback) {
var numbersCompleted = 0;
var errors = [];
var successfulNumbers = [];
var numberCompleted = function() {
numbersCompleted++;
if (numbersCompleted >= numbers.length)
callback({success: successfulNumbers, failure: errors});
};
var registerError = function(number, reason, error) {
if (!error || error.name === 'HTTPError') {
error = new textsecure.OutgoingMessageError(number, message.toArrayBuffer(), timestamp, error);
}
error.number = number;
error.reason = reason;
errors[errors.length] = error;
numberCompleted();
};
var reloadDevicesAndSend = function(number, recurse) {
return function() {
return textsecure.storage.devices.getDeviceObjectsForNumber(number).then(function(devicesForNumber) {
if (devicesForNumber.length == 0)
return registerError(number, "Got empty device list when loading device keys", null);
doSendMessage(number, devicesForNumber, recurse);
});
}
};
var getKeysForNumber = function(number, updateDevices) {
var handleResult = function(response) {
return Promise.all(response.devices.map(function(device) {
if (updateDevices === undefined || updateDevices.indexOf(device.deviceId) > -1)
return textsecure.storage.devices.saveKeysToDeviceObject({
encodedNumber: number + "." + device.deviceId,
identityKey: response.identityKey,
preKey: device.preKey.publicKey,
preKeyId: device.preKey.keyId,
signedKey: device.signedPreKey.publicKey,
signedKeyId: device.signedPreKey.keyId,
signedKeySignature: device.signedPreKey.signature,
registrationId: device.registrationId
}).catch(function(error) {
if (error.message === "Identity key changed") {
error = new textsecure.OutgoingIdentityKeyError(number, message.toArrayBuffer(), timestamp, error.identityKey);
registerError(number, "Identity key changed", error);
}
throw error;
});
}));
};
if (updateDevices === undefined) {
return this.server.getKeysForNumber(number).then(handleResult);
} else {
var promises = updateDevices.map(function(device) {
return this.server.getKeysForNumber(number, device).then(handleResult);
}.bind(this));
return Promise.all(promises);
}
}.bind(this);
var doSendMessage = function(number, devicesForNumber, recurse) {
return this.encryptToDevices(timestamp, number, devicesForNumber, message).then(function(jsonData) {
return this.transmitMessage(number, jsonData).then(function() {
successfulNumbers[successfulNumbers.length] = number;
numberCompleted();
}.bind(this));
}.bind(this)).catch(function(error) {
if (error instanceof Error && error.name == "HTTPError" && (error.code == 410 || error.code == 409)) {
if (!recurse)
return registerError(number, "Hit retry limit attempting to reload device list", error);
var p;
if (error.code == 409) {
p = textsecure.storage.devices.removeDeviceIdsForNumber(number, error.response.extraDevices);
} else {
p = Promise.all(error.response.staleDevices.map(function(deviceId) {
return textsecure.protocol_wrapper.closeOpenSessionForDevice(number + '.' + deviceId);
}));
}
p.then(function() {
var resetDevices = ((error.code == 410) ? error.response.staleDevices : error.response.missingDevices);
getKeysForNumber(number, resetDevices)
.then(reloadDevicesAndSend(number, (error.code == 409)))
.catch(function(error) {
registerError(number, "Failed to reload device keys", error);
});
});
} else {
registerError(number, "Failed to create or send message", error);
}
});
}.bind(this);
numbers.forEach(function(number) {
textsecure.storage.devices.getDeviceObjectsForNumber(number).then(function(devicesForNumber) {
return Promise.all(devicesForNumber.map(function(device) {
return textsecure.protocol_wrapper.hasOpenSession(device.encodedNumber).then(function(result) {
if (!result)
return getKeysForNumber(number, [parseInt(textsecure.utils.unencodeNumber(device.encodedNumber)[1])]);
});
})).then(function() {
return textsecure.storage.devices.getDeviceObjectsForNumber(number).then(function(devicesForNumber) {
if (devicesForNumber.length == 0) {
getKeysForNumber(number, [1])
.then(reloadDevicesAndSend(number, true))
.catch(function(error) {
registerError(number, "Failed to retreive new device keys for number " + number, error);
});
} else
doSendMessage(number, devicesForNumber, true);
});
});
});
});
},
sendIndividualProto: function(number, proto, timestamp) {
return new Promise(function(resolve, reject) {
this.sendMessageProto(timestamp, [number], proto, function(res) {
if (res.failure.length > 0)
reject(res.failure);
else
resolve();
});
}.bind(this));
},
sendSyncMessage: function(message, timestamp, destination) {
var myNumber = textsecure.storage.user.getNumber();
var myDevice = textsecure.storage.user.getDeviceId();
if (myDevice != 1) {
var sentMessage = new textsecure.protobuf.SyncMessage.Sent();
sentMessage.timestamp = timestamp;
sentMessage.message = message;
if (destination) {
sentMessage.destination = destination;
}
var syncMessage = new textsecure.protobuf.SyncMessage();
syncMessage.sent = sentMessage;
var contentMessage = new textsecure.protobuf.Content();
contentMessage.syncMessage = syncMessage;
return this.sendIndividualProto(myNumber, contentMessage, Date.now());
}
},
sendRequestGroupSyncMessage: function() {
var myNumber = textsecure.storage.user.getNumber();
var myDevice = textsecure.storage.user.getDeviceId();
if (myDevice != 1) {
var request = new textsecure.protobuf.SyncMessage.Request();
request.type = textsecure.protobuf.SyncMessage.Request.Type.GROUPS;
var syncMessage = new textsecure.protobuf.SyncMessage();
syncMessage.request = request;
var contentMessage = new textsecure.protobuf.Content();
contentMessage.syncMessage = syncMessage;
return this.sendIndividualProto(myNumber, contentMessage, Date.now());
}
},
sendRequestContactSyncMessage: function() {
var myNumber = textsecure.storage.user.getNumber();
var myDevice = textsecure.storage.user.getDeviceId();
if (myDevice != 1) {
var request = new textsecure.protobuf.SyncMessage.Request();
request.type = textsecure.protobuf.SyncMessage.Request.Type.CONTACTS;
var syncMessage = new textsecure.protobuf.SyncMessage();
syncMessage.request = request;
var contentMessage = new textsecure.protobuf.Content();
contentMessage.syncMessage = syncMessage;
return this.sendIndividualProto(myNumber, contentMessage, Date.now());
}
},
sendGroupProto: function(numbers, proto, timestamp) {
timestamp = timestamp || Date.now();
var me = textsecure.storage.user.getNumber();
numbers = numbers.filter(function(number) { return number != me; });
return new Promise(function(resolve, reject) {
this.sendMessageProto(timestamp, numbers, proto, function(res) {
if (res.failure.length > 0)
reject(res.failure);
else
resolve();
});
}.bind(this)).then(this.sendSyncMessage.bind(this, proto, timestamp));
},
sendMessageToNumber: function(number, messageText, attachments, timestamp) {
var proto = new textsecure.protobuf.DataMessage();
proto.body = messageText;
return Promise.all(attachments.map(this.makeAttachmentPointer.bind(this))).then(function(attachmentsArray) {
proto.attachments = attachmentsArray;
return this.sendIndividualProto(number, proto, timestamp).then(function() {
return this.sendSyncMessage(proto, timestamp, number);
}.bind(this));
}.bind(this));
},
closeSession: function(number) {
var proto = new textsecure.protobuf.DataMessage();
proto.body = "TERMINATE";
proto.flags = textsecure.protobuf.DataMessage.Flags.END_SESSION;
return this.sendIndividualProto(number, proto, Date.now()).then(function(res) {
return textsecure.storage.devices.getDeviceObjectsForNumber(number).then(function(devices) {
return Promise.all(devices.map(function(device) {
return textsecure.protocol_wrapper.closeOpenSessionForDevice(device.encodedNumber);
})).then(function() {
return res;
});
});
});
},
sendMessageToGroup: function(groupId, messageText, attachments, timestamp) {
var proto = new textsecure.protobuf.DataMessage();
proto.body = messageText;
proto.group = new textsecure.protobuf.GroupContext();
proto.group.id = toArrayBuffer(groupId);
proto.group.type = textsecure.protobuf.GroupContext.Type.DELIVER;
return textsecure.storage.groups.getNumbers(groupId).then(function(numbers) {
if (numbers === undefined)
return Promise.reject(new Error("Unknown Group"));
return Promise.all(attachments.map(this.makeAttachmentPointer.bind(this))).then(function(attachmentsArray) {
proto.attachments = attachmentsArray;
return this.sendGroupProto(numbers, proto, timestamp);
}.bind(this));
}.bind(this));
},
createGroup: function(numbers, name, avatar) {
var proto = new textsecure.protobuf.DataMessage();
proto.group = new textsecure.protobuf.GroupContext();
return textsecure.storage.groups.createNewGroup(numbers).then(function(group) {
proto.group.id = toArrayBuffer(group.id);
var numbers = group.numbers;
proto.group.type = textsecure.protobuf.GroupContext.Type.UPDATE;
proto.group.members = numbers;
proto.group.name = name;
return this.makeAttachmentPointer(avatar).then(function(attachment) {
proto.group.avatar = attachment;
return this.sendGroupProto(numbers, proto).then(function() {
return proto.group.id;
});
}.bind(this));
}.bind(this));
},
updateGroup: function(groupId, name, avatar, numbers) {
var proto = new textsecure.protobuf.DataMessage();
proto.group = new textsecure.protobuf.GroupContext();
proto.group.id = toArrayBuffer(groupId);
proto.group.type = textsecure.protobuf.GroupContext.Type.UPDATE;
proto.group.name = name;
return textsecure.storage.groups.addNumbers(groupId, numbers).then(function(numbers) {
if (numbers === undefined) {
return Promise.reject(new Error("Unknown Group"));
}
proto.group.members = numbers;
return this.makeAttachmentPointer(avatar).then(function(attachment) {
proto.group.avatar = attachment;
return this.sendGroupProto(numbers, proto).then(function() {
return proto.group.id;
});
}.bind(this));
}.bind(this));
},
addNumberToGroup: function(groupId, number) {
var proto = new textsecure.protobuf.DataMessage();
proto.group = new textsecure.protobuf.GroupContext();
proto.group.id = toArrayBuffer(groupId);
proto.group.type = textsecure.protobuf.GroupContext.Type.UPDATE;
return textsecure.storage.groups.addNumbers(groupId, [number]).then(function(numbers) {
if (numbers === undefined)
return Promise.reject(new Error("Unknown Group"));
proto.group.members = numbers;
return this.sendGroupProto(numbers, proto);
}.bind(this));
},
setGroupName: function(groupId, name) {
var proto = new textsecure.protobuf.DataMessage();
proto.group = new textsecure.protobuf.GroupContext();
proto.group.id = toArrayBuffer(groupId);
proto.group.type = textsecure.protobuf.GroupContext.Type.UPDATE;
proto.group.name = name;
return textsecure.storage.groups.getNumbers(groupId).then(function(numbers) {
if (numbers === undefined)
return Promise.reject(new Error("Unknown Group"));
proto.group.members = numbers;
return this.sendGroupProto(numbers, proto);
}.bind(this));
},
setGroupAvatar: function(groupId, avatar) {
var proto = new textsecure.protobuf.DataMessage();
proto.group = new textsecure.protobuf.GroupContext();
proto.group.id = toArrayBuffer(groupId);
proto.group.type = textsecure.protobuf.GroupContext.Type.UPDATE;
return textsecure.storage.groups.getNumbers(groupId).then(function(numbers) {
if (numbers === undefined)
return Promise.reject(new Error("Unknown Group"));
proto.group.members = numbers;
return this.makeAttachmentPointer(avatar).then(function(attachment) {
proto.group.avatar = attachment;
return this.sendGroupProto(numbers, proto);
}.bind(this));
}.bind(this));
},
leaveGroup: function(groupId) {
var proto = new textsecure.protobuf.DataMessage();
proto.group = new textsecure.protobuf.GroupContext();
proto.group.id = toArrayBuffer(groupId);
proto.group.type = textsecure.protobuf.GroupContext.Type.QUIT;
return textsecure.storage.groups.getNumbers(groupId).then(function(numbers) {
if (numbers === undefined)
return Promise.reject(new Error("Unknown Group"));
return textsecure.storage.groups.deleteGroup(groupId).then(function() {
return this.sendGroupProto(numbers, proto);
}.bind(this));
});
}
};
window.textsecure = window.textsecure || {};
textsecure.MessageSender = function(url, username, password) {
var sender = new MessageSender(url, username, password);
textsecure.replay.registerFunction(sender.tryMessageAgain.bind(sender), textsecure.replay.Type.ENCRYPT_MESSAGE);
textsecure.replay.registerFunction(sender.transmitMessage.bind(sender), textsecure.replay.Type.TRANSMIT_MESSAGE);
this.sendRequestGroupSyncMessage = sender.sendRequestGroupSyncMessage .bind(sender);
this.sendRequestContactSyncMessage = sender.sendRequestContactSyncMessage.bind(sender);
this.sendMessageToNumber = sender.sendMessageToNumber .bind(sender);
this.closeSession = sender.closeSession .bind(sender);
this.sendMessageToGroup = sender.sendMessageToGroup .bind(sender);
this.createGroup = sender.createGroup .bind(sender);
this.updateGroup = sender.updateGroup .bind(sender);
this.addNumberToGroup = sender.addNumberToGroup .bind(sender);
this.setGroupName = sender.setGroupName .bind(sender);
this.setGroupAvatar = sender.setGroupAvatar .bind(sender);
this.leaveGroup = sender.leaveGroup .bind(sender);
};
textsecure.MessageSender.prototype = {
constructor: textsecure.MessageSender
};
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