98 lines
3.2 KiB
JavaScript
98 lines
3.2 KiB
JavaScript
'use strict';
|
|
|
|
const CommandCode = require('../constants/commands.js');
|
|
const ClientConstants = require('../constants/client.js');
|
|
const Packet = require('../packets/packet.js');
|
|
const auth41 = require('../auth_41.js');
|
|
const CharsetToEncoding = require('../constants/charset_encodings.js');
|
|
|
|
// https://dev.mysql.com/doc/internals/en/com-change-user.html#packet-COM_CHANGE_USER
|
|
class ChangeUser {
|
|
constructor(opts) {
|
|
this.flags = opts.flags;
|
|
this.user = opts.user || '';
|
|
this.database = opts.database || '';
|
|
this.password = opts.password || '';
|
|
this.passwordSha1 = opts.passwordSha1;
|
|
this.authPluginData1 = opts.authPluginData1;
|
|
this.authPluginData2 = opts.authPluginData2;
|
|
this.connectAttributes = opts.connectAttrinutes || {};
|
|
let authToken;
|
|
if (this.passwordSha1) {
|
|
authToken = auth41.calculateTokenFromPasswordSha(
|
|
this.passwordSha1,
|
|
this.authPluginData1,
|
|
this.authPluginData2
|
|
);
|
|
} else {
|
|
authToken = auth41.calculateToken(
|
|
this.password,
|
|
this.authPluginData1,
|
|
this.authPluginData2
|
|
);
|
|
}
|
|
this.authToken = authToken;
|
|
this.charsetNumber = opts.charsetNumber;
|
|
}
|
|
|
|
// TODO
|
|
// ChangeUser.fromPacket = function(packet)
|
|
// };
|
|
serializeToBuffer(buffer) {
|
|
const isSet = (flag) => this.flags & ClientConstants[flag];
|
|
const packet = new Packet(0, buffer, 0, buffer.length);
|
|
packet.offset = 4;
|
|
const encoding = CharsetToEncoding[this.charsetNumber];
|
|
packet.writeInt8(CommandCode.CHANGE_USER);
|
|
packet.writeNullTerminatedString(this.user, encoding);
|
|
if (isSet('SECURE_CONNECTION')) {
|
|
packet.writeInt8(this.authToken.length);
|
|
packet.writeBuffer(this.authToken);
|
|
} else {
|
|
packet.writeBuffer(this.authToken);
|
|
packet.writeInt8(0);
|
|
}
|
|
packet.writeNullTerminatedString(this.database, encoding);
|
|
packet.writeInt16(this.charsetNumber);
|
|
if (isSet('PLUGIN_AUTH')) {
|
|
// TODO: read this from parameters
|
|
packet.writeNullTerminatedString('mysql_native_password', 'latin1');
|
|
}
|
|
if (isSet('CONNECT_ATTRS')) {
|
|
const connectAttributes = this.connectAttributes;
|
|
const attrNames = Object.keys(connectAttributes);
|
|
let keysLength = 0;
|
|
for (let k = 0; k < attrNames.length; ++k) {
|
|
keysLength += Packet.lengthCodedStringLength(attrNames[k], encoding);
|
|
keysLength += Packet.lengthCodedStringLength(
|
|
connectAttributes[attrNames[k]],
|
|
encoding
|
|
);
|
|
}
|
|
packet.writeLengthCodedNumber(keysLength);
|
|
for (let k = 0; k < attrNames.length; ++k) {
|
|
packet.writeLengthCodedString(attrNames[k], encoding);
|
|
packet.writeLengthCodedString(
|
|
connectAttributes[attrNames[k]],
|
|
encoding
|
|
);
|
|
}
|
|
}
|
|
return packet;
|
|
}
|
|
|
|
toPacket() {
|
|
if (typeof this.user !== 'string') {
|
|
throw new Error('"user" connection config property must be a string');
|
|
}
|
|
if (typeof this.database !== 'string') {
|
|
throw new Error('"database" connection config property must be a string');
|
|
}
|
|
// dry run: calculate resulting packet length
|
|
const p = this.serializeToBuffer(Packet.MockBuffer());
|
|
return this.serializeToBuffer(Buffer.allocUnsafe(p.offset));
|
|
}
|
|
}
|
|
|
|
module.exports = ChangeUser;
|