mirror of
https://github.com/nodemailer/wildduck.git
synced 2024-11-14 21:35:57 +08:00
330 lines
13 KiB
JavaScript
330 lines
13 KiB
JavaScript
'use strict';
|
|
|
|
const imapHandler = require('./handler/imap-handler');
|
|
const errors = require('../../lib/errors.js');
|
|
const MAX_MESSAGE_SIZE = 1 * 1024 * 1024;
|
|
|
|
const commands = new Map([
|
|
/*eslint-disable global-require*/
|
|
// require must normally be on top of the module
|
|
['NOOP', require('./commands/noop')],
|
|
['CAPABILITY', require('./commands/capability')],
|
|
['LOGOUT', require('./commands/logout')],
|
|
['ID', require('./commands/id')],
|
|
['STARTTLS', require('./commands/starttls')],
|
|
['LOGIN', require('./commands/login')],
|
|
['AUTHENTICATE PLAIN', require('./commands/authenticate-plain')],
|
|
['AUTHENTICATE PLAIN-CLIENTTOKEN', require('./commands/authenticate-plain')],
|
|
['NAMESPACE', require('./commands/namespace')],
|
|
['LIST', require('./commands/list')],
|
|
['LSUB', require('./commands/lsub')],
|
|
['SUBSCRIBE', require('./commands/subscribe')],
|
|
['UNSUBSCRIBE', require('./commands/unsubscribe')],
|
|
['CREATE', require('./commands/create')],
|
|
['DELETE', require('./commands/delete')],
|
|
['RENAME', require('./commands/rename')],
|
|
['SELECT', require('./commands/select')],
|
|
['EXAMINE', require('./commands/select')],
|
|
['IDLE', require('./commands/idle')],
|
|
['CHECK', require('./commands/check')],
|
|
['STATUS', require('./commands/status')],
|
|
['APPEND', require('./commands/append')],
|
|
['STORE', require('./commands/store')],
|
|
['UID STORE', require('./commands/uid-store')],
|
|
['EXPUNGE', require('./commands/expunge')],
|
|
['UID EXPUNGE', require('./commands/uid-expunge')],
|
|
['CLOSE', require('./commands/close')],
|
|
['UNSELECT', require('./commands/unselect')],
|
|
['COPY', require('./commands/copy')],
|
|
['UID COPY', require('./commands/copy')],
|
|
['MOVE', require('./commands/move')],
|
|
['UID MOVE', require('./commands/move')],
|
|
['FETCH', require('./commands/fetch')],
|
|
['UID FETCH', require('./commands/fetch')],
|
|
['SEARCH', require('./commands/search')],
|
|
['UID SEARCH', require('./commands/search')],
|
|
['ENABLE', require('./commands/enable')],
|
|
['GETQUOTAROOT', require('./commands/getquotaroot')],
|
|
['SETQUOTA', require('./commands/setquota')],
|
|
['GETQUOTA', require('./commands/getquota')],
|
|
['COMPRESS', require('./commands/compress')]
|
|
/*eslint-enable global-require*/
|
|
]);
|
|
|
|
class IMAPCommand {
|
|
constructor(connection) {
|
|
this.connection = connection;
|
|
this.payload = '';
|
|
this.first = true;
|
|
}
|
|
|
|
append(command, callback) {
|
|
let chunks = [];
|
|
let chunklen = 0;
|
|
|
|
this.payload += command.value;
|
|
|
|
if (this.first) {
|
|
// fetch tag and command name
|
|
this.first = false;
|
|
|
|
// only check payload if it is a regular command, not input for something else
|
|
if (typeof this.connection._nextHandler !== 'function') {
|
|
let match = /^([^\s]+)(?:\s+((?:AUTHENTICATE |UID )?[^\s]+)|$)/i.exec(command.value) || [];
|
|
this.tag = match[1];
|
|
this.command = (match[2] || '').trim().toUpperCase();
|
|
|
|
if (!this.command || !this.tag) {
|
|
let err = new Error('Invalid tag');
|
|
errors.notifyConnection(this.connection, err, {
|
|
payload: this.payload ? (this.payload.length < 256 ? this.payload : this.payload.toString().substr(0, 150) + '...') : false
|
|
});
|
|
this.connection.send('* BAD Invalid tag');
|
|
return callback(err);
|
|
}
|
|
|
|
if (!commands.has(this.command)) {
|
|
let err = new Error('Unknown command');
|
|
errors.notifyConnection(this.connection, err, {
|
|
payload: this.payload ? (this.payload.length < 256 ? this.payload : this.payload.toString().substr(0, 150) + '...') : false
|
|
});
|
|
this.connection.send(this.tag + ' BAD Unknown command: ' + this.command);
|
|
return callback(err);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (command.literal) {
|
|
// check if the literal size is in acceptable bounds
|
|
if (isNaN(command.expecting) || isNaN(command.expecting) < 0 || command.expecting > Number.MAX_SAFE_INTEGER) {
|
|
errors.notifyConnection(this.connection, new Error('Invalid literal size'), {
|
|
command: {
|
|
expecting: command.expecting
|
|
}
|
|
});
|
|
this.connection.send(this.tag + ' BAD Invalid literal size');
|
|
this.payload = '';
|
|
this.first = true;
|
|
return callback(new Error('Literal too big'));
|
|
}
|
|
|
|
let maxAllowed = Math.max(Number(this.connection._server.options.maxMessage) || 0, MAX_MESSAGE_SIZE);
|
|
if (
|
|
// Allow large literals for selected commands only
|
|
(!['APPEND'].includes(this.command) && command.expecting > 1024) ||
|
|
// Deny all literals bigger than maxMessage
|
|
command.expecting > maxAllowed
|
|
) {
|
|
this.connection._server.logger.debug(
|
|
{
|
|
tnx: 'client',
|
|
cid: this.connection.id
|
|
},
|
|
'[%s] C:',
|
|
this.connection.id,
|
|
this.payload
|
|
);
|
|
|
|
this.payload = ''; // reset payload
|
|
|
|
if (command.expecting > maxAllowed) {
|
|
// APPENDLIMIT response for too large messages
|
|
this.connection.send(this.tag + ' BAD [TOOBIG] Literal too large');
|
|
} else {
|
|
this.connection.send(this.tag + ' NO Literal too large');
|
|
}
|
|
|
|
return callback(new Error('Literal too big'));
|
|
}
|
|
|
|
// Accept literal input
|
|
this.connection.send('+ Go ahead');
|
|
|
|
// currently the stream is buffered into a large string and thats it.
|
|
// in the future we might consider some kind of actual stream usage
|
|
command.literal.on('data', chunk => {
|
|
chunks.push(chunk);
|
|
chunklen += chunk.length;
|
|
});
|
|
|
|
command.literal.on('end', () => {
|
|
this.payload += '\r\n' + Buffer.concat(chunks, chunklen).toString('binary');
|
|
command.readyCallback(); // call this once stream is fully processed and ready to accept next data
|
|
});
|
|
}
|
|
|
|
callback();
|
|
}
|
|
|
|
end(command, callback) {
|
|
let callbackSent = false;
|
|
let next = err => {
|
|
if (!callbackSent) {
|
|
callbackSent = true;
|
|
return callback(err);
|
|
}
|
|
};
|
|
|
|
this.append(command, err => {
|
|
if (err) {
|
|
return next(err);
|
|
}
|
|
|
|
// check if the payload needs to be directed to a preset handler
|
|
if (typeof this.connection._nextHandler === 'function') {
|
|
this.connection._server.logger.debug(
|
|
{
|
|
tnx: 'client',
|
|
cid: this.connection.id
|
|
},
|
|
'[%s] C: <%s bytes of data>',
|
|
this.connection.id,
|
|
(this.payload && this.payload.length) || 0
|
|
);
|
|
return this.connection._nextHandler(this.payload, next);
|
|
}
|
|
|
|
try {
|
|
this.parsed = imapHandler.parser(this.payload);
|
|
} catch (E) {
|
|
errors.notifyConnection(this.connection, E, {
|
|
payload: this.payload ? (this.payload.length < 256 ? this.payload : this.payload.toString().substr(0, 150) + '...') : false
|
|
});
|
|
this.connection._server.logger.debug(
|
|
{
|
|
err: E,
|
|
tnx: 'client',
|
|
cid: this.connection.id
|
|
},
|
|
'[%s] C:',
|
|
this.connection.id,
|
|
this.payload
|
|
);
|
|
this.connection.send(this.tag + ' BAD ' + E.message);
|
|
return next();
|
|
}
|
|
|
|
let handler = commands.get(this.command);
|
|
|
|
if (/^(AUTHENTICATE|LOGIN)/.test(this.command) && Array.isArray(this.parsed.attributes)) {
|
|
this.parsed.attributes.forEach(attr => {
|
|
if (attr && typeof attr === 'object' && attr.value) {
|
|
attr.sensitive = true;
|
|
}
|
|
});
|
|
}
|
|
|
|
this.connection._server.logger.debug(
|
|
{
|
|
tnx: 'client',
|
|
cid: this.connection.id
|
|
},
|
|
'[%s] C:',
|
|
this.connection.id,
|
|
imapHandler.compiler(this.parsed, false, true)
|
|
);
|
|
|
|
this.validateCommand(this.parsed, handler, err => {
|
|
if (err) {
|
|
let payload = imapHandler.compiler(this.parsed, false, true);
|
|
errors.notifyConnection(this.connection, err, {
|
|
payload: payload ? (payload.length < 256 ? payload : payload.toString().substr(0, 150) + '...') : false
|
|
});
|
|
this.connection.send(this.tag + ' ' + (err.response || 'BAD') + ' ' + err.message);
|
|
return next(err);
|
|
}
|
|
|
|
if (typeof handler.handler === 'function') {
|
|
handler.handler.call(
|
|
this.connection,
|
|
this.parsed,
|
|
(err, response) => {
|
|
if (err) {
|
|
let payload = imapHandler.compiler(this.parsed, false, true);
|
|
errors.notifyConnection(this.connection, err, {
|
|
payload: payload ? (payload.length < 256 ? payload : payload.toString().substr(0, 150) + '...') : false
|
|
});
|
|
this.connection.send(this.tag + ' ' + (err.response || 'BAD') + ' ' + err.message);
|
|
return next(err);
|
|
}
|
|
|
|
// send EXPUNGE, EXISTS etc queued notices
|
|
this.sendNotifications(handler, () => {
|
|
// send command ready response
|
|
this.connection.writeStream.write({
|
|
tag: this.tag,
|
|
command: response.response,
|
|
attributes: []
|
|
.concat(
|
|
response.code
|
|
? {
|
|
type: 'SECTION',
|
|
section: [
|
|
{
|
|
type: 'TEXT',
|
|
value: response.code
|
|
}
|
|
]
|
|
}
|
|
: []
|
|
)
|
|
.concat({
|
|
type: 'TEXT',
|
|
value: response.message || this.command + ' completed'
|
|
})
|
|
});
|
|
|
|
next();
|
|
});
|
|
},
|
|
next
|
|
);
|
|
} else {
|
|
this.connection.send(this.tag + ' NO Not implemented: ' + this.command);
|
|
return next();
|
|
}
|
|
});
|
|
});
|
|
}
|
|
|
|
sendNotifications(handler, callback) {
|
|
if (this.connection.state !== 'Selected' || !!handler.disableNotifications) {
|
|
// nothing to advertise if not in Selected state
|
|
return callback();
|
|
}
|
|
|
|
this.connection.emitNotifications();
|
|
|
|
return callback();
|
|
}
|
|
|
|
validateCommand(parsed, handler, callback) {
|
|
let schema = handler.schema || [];
|
|
let maxArgs = schema.length;
|
|
let minArgs = schema.filter(item => !item.optional).length;
|
|
|
|
// Check if the command can be run in current state
|
|
if (handler.state && [].concat(handler.state || []).indexOf(this.connection.state) < 0) {
|
|
return callback(new Error(parsed.command.toUpperCase() + ' not allowed now'));
|
|
}
|
|
|
|
if (handler.schema === false) {
|
|
//schema check is disabled
|
|
return callback();
|
|
}
|
|
|
|
// Deny commands with too many arguments
|
|
if (parsed.attributes && parsed.attributes.length > maxArgs) {
|
|
return callback(new Error('Too many arguments provided'));
|
|
}
|
|
|
|
// Deny commands with too little arguments
|
|
if (((parsed.attributes && parsed.attributes.length) || 0) < minArgs) {
|
|
return callback(new Error('Not enough arguments provided'));
|
|
}
|
|
|
|
callback();
|
|
}
|
|
}
|
|
|
|
module.exports.IMAPCommand = IMAPCommand;
|