added api server and changed docker files

login-auth_backend/node_modules/mysql2/lib/packets/auth_next_factor.js

@@ -0,0 +1,35 @@
+// Copyright (c) 2021, Oracle and/or its affiliates.
+
+'use strict';
+
+const Packet = require('../packets/packet');
+
+class AuthNextFactor {
+  constructor(opts) {
+    this.pluginName = opts.pluginName;
+    this.pluginData = opts.pluginData;
+  }
+
+  toPacket(encoding) {
+    const length = 6 + this.pluginName.length + this.pluginData.length;
+    const buffer = Buffer.allocUnsafe(length);
+    const packet = new Packet(0, buffer, 0, length);
+    packet.offset = 4;
+    packet.writeInt8(0x02);
+    packet.writeNullTerminatedString(this.pluginName, encoding);
+    packet.writeBuffer(this.pluginData);
+    return packet;
+  }
+
+  static fromPacket(packet, encoding) {
+    packet.readInt8(); // marker
+    const name = packet.readNullTerminatedString(encoding);
+    const data = packet.readBuffer();
+    return new AuthNextFactor({
+      pluginName: name,
+      pluginData: data,
+    });
+  }
+}
+
+module.exports = AuthNextFactor;

login-auth_backend/node_modules/mysql2/lib/packets/auth_switch_request.js

@@ -0,0 +1,38 @@
+'use strict';
+
+// http://dev.mysql.com/doc/internals/en/connection-phase-packets.html#packet-Protocol::AuthSwitchRequest
+
+const Packet = require('../packets/packet');
+
+class AuthSwitchRequest {
+  constructor(opts) {
+    this.pluginName = opts.pluginName;
+    this.pluginData = opts.pluginData;
+  }
+
+  toPacket() {
+    const length = 6 + this.pluginName.length + this.pluginData.length;
+    const buffer = Buffer.allocUnsafe(length);
+    const packet = new Packet(0, buffer, 0, length);
+    packet.offset = 4;
+    packet.writeInt8(0xfe);
+    // TODO: use server encoding
+    packet.writeNullTerminatedString(this.pluginName, 'cesu8');
+    packet.writeBuffer(this.pluginData);
+    return packet;
+  }
+
+  static fromPacket(packet) {
+    packet.readInt8(); // marker
+    // assert marker == 0xfe?
+    // TODO: use server encoding
+    const name = packet.readNullTerminatedString('cesu8');
+    const data = packet.readBuffer();
+    return new AuthSwitchRequest({
+      pluginName: name,
+      pluginData: data,
+    });
+  }
+}
+
+module.exports = AuthSwitchRequest;

login-auth_backend/node_modules/mysql2/lib/packets/auth_switch_request_more_data.js

@@ -0,0 +1,33 @@
+'use strict';
+
+// http://dev.mysql.com/doc/internals/en/connection-phase-packets.html#packet-Protocol::AuthSwitchRequest
+
+const Packet = require('../packets/packet');
+
+class AuthSwitchRequestMoreData {
+  constructor(data) {
+    this.data = data;
+  }
+
+  toPacket() {
+    const length = 5 + this.data.length;
+    const buffer = Buffer.allocUnsafe(length);
+    const packet = new Packet(0, buffer, 0, length);
+    packet.offset = 4;
+    packet.writeInt8(0x01);
+    packet.writeBuffer(this.data);
+    return packet;
+  }
+
+  static fromPacket(packet) {
+    packet.readInt8(); // marker
+    const data = packet.readBuffer();
+    return new AuthSwitchRequestMoreData(data);
+  }
+
+  static verifyMarker(packet) {
+    return packet.peekByte() === 0x01;
+  }
+}
+
+module.exports = AuthSwitchRequestMoreData;

login-auth_backend/node_modules/mysql2/lib/packets/auth_switch_response.js

@@ -0,0 +1,30 @@
+'use strict';
+
+// http://dev.mysql.com/doc/internals/en/connection-phase-packets.html#packet-Protocol::AuthSwitchRequest
+
+const Packet = require('../packets/packet');
+
+class AuthSwitchResponse {
+  constructor(data) {
+    if (!Buffer.isBuffer(data)) {
+      data = Buffer.from(data);
+    }
+    this.data = data;
+  }
+
+  toPacket() {
+    const length = 4 + this.data.length;
+    const buffer = Buffer.allocUnsafe(length);
+    const packet = new Packet(0, buffer, 0, length);
+    packet.offset = 4;
+    packet.writeBuffer(this.data);
+    return packet;
+  }
+
+  static fromPacket(packet) {
+    const data = packet.readBuffer();
+    return new AuthSwitchResponse(data);
+  }
+}
+
+module.exports = AuthSwitchResponse;

login-auth_backend/node_modules/mysql2/lib/packets/binary_row.js

@@ -0,0 +1,95 @@
+'use strict';
+
+const Types = require('../constants/types');
+const Packet = require('../packets/packet');
+
+const binaryReader = new Array(256);
+
+class BinaryRow {
+  constructor(columns) {
+    this.columns = columns || [];
+  }
+
+  static toPacket(columns, encoding) {
+    // throw new Error('Not implemented');
+    const sequenceId = 0; // TODO remove, this is calculated now in connecton
+    let length = 0;
+    columns.forEach((val) => {
+      if (val === null || typeof val === 'undefined') {
+        ++length;
+        return;
+      }
+      length += Packet.lengthCodedStringLength(val.toString(10), encoding);
+    });
+
+    length = length + 2;
+
+    const buffer = Buffer.allocUnsafe(length + 4);
+    const packet = new Packet(sequenceId, buffer, 0, length + 4);
+    packet.offset = 4;
+
+    packet.writeInt8(0);
+
+    let bitmap = 0;
+    let bitValue = 1;
+    columns.forEach((parameter) => {
+      if (parameter.type === Types.NULL) {
+        bitmap += bitValue;
+      }
+      bitValue *= 2;
+      if (bitValue === 256) {
+        packet.writeInt8(bitmap);
+        bitmap = 0;
+        bitValue = 1;
+      }
+    });
+    if (bitValue !== 1) {
+      packet.writeInt8(bitmap);
+    }
+
+    columns.forEach((val) => {
+      if (val === null) {
+        packet.writeNull();
+        return;
+      }
+      if (typeof val === 'undefined') {
+        packet.writeInt8(0);
+        return;
+      }
+      packet.writeLengthCodedString(val.toString(10), encoding);
+    });
+    return packet;
+  }
+
+  // TODO: complete list of types...
+  static fromPacket(fields, packet) {
+    const columns = new Array(fields.length);
+    packet.readInt8(); // TODO check it's 0
+    const nullBitmapLength = Math.floor((fields.length + 7 + 2) / 8);
+    // TODO: read and interpret null bitmap
+    packet.skip(nullBitmapLength);
+    for (let i = 0; i < columns.length; ++i) {
+      columns[i] = binaryReader[fields[i].columnType].apply(packet);
+    }
+    return new BinaryRow(columns);
+  }
+}
+
+// TODO: replace with constants.MYSQL_TYPE_*
+binaryReader[Types.DECIMAL] = Packet.prototype.readLengthCodedString;
+binaryReader[1] = Packet.prototype.readInt8; // tiny
+binaryReader[2] = Packet.prototype.readInt16; // short
+binaryReader[3] = Packet.prototype.readInt32; // long
+binaryReader[4] = Packet.prototype.readFloat; // float
+binaryReader[5] = Packet.prototype.readDouble; // double
+binaryReader[6] = Packet.prototype.assertInvalid; // null, should be skipped vie null bitmap
+binaryReader[7] = Packet.prototype.readTimestamp; // timestamp, http://dev.mysql.com/doc/internals/en/prepared-statements.html#packet-ProtocolBinary::MYSQL_TYPE_TIMESTAMP
+binaryReader[8] = Packet.prototype.readInt64; // long long
+binaryReader[9] = Packet.prototype.readInt32; // int24
+binaryReader[10] = Packet.prototype.readTimestamp; // date
+binaryReader[11] = Packet.prototype.readTime; // time, http://dev.mysql.com/doc/internals/en/prepared-statements.html#packet-ProtocolBinary::MYSQL_TYPE_TIME
+binaryReader[12] = Packet.prototype.readDateTime; // datetime, http://dev.mysql.com/doc/internals/en/prepared-statements.html#packet-ProtocolBinary::MYSQL_TYPE_DATETIME
+binaryReader[13] = Packet.prototype.readInt16; // year
+binaryReader[Types.VAR_STRING] = Packet.prototype.readLengthCodedString; // var string
+
+module.exports = BinaryRow;

login-auth_backend/node_modules/mysql2/lib/packets/binlog_dump.js

@@ -0,0 +1,33 @@
+'use strict';
+
+// http://dev.mysql.com/doc/internals/en/com-binlog-dump.html#packet-COM_BINLOG_DUMP
+
+const Packet = require('../packets/packet');
+const CommandCodes = require('../constants/commands');
+
+// TODO: add flag to constants
+// 0x01 - BINLOG_DUMP_NON_BLOCK
+// send EOF instead of blocking
+class BinlogDump {
+  constructor(opts) {
+    this.binlogPos = opts.binlogPos || 0;
+    this.serverId = opts.serverId || 0;
+    this.flags = opts.flags || 0;
+    this.filename = opts.filename || '';
+  }
+
+  toPacket() {
+    const length = 15 + Buffer.byteLength(this.filename, 'utf8'); // TODO: should be ascii?
+    const buffer = Buffer.allocUnsafe(length);
+    const packet = new Packet(0, buffer, 0, length);
+    packet.offset = 4;
+    packet.writeInt8(CommandCodes.BINLOG_DUMP);
+    packet.writeInt32(this.binlogPos);
+    packet.writeInt16(this.flags);
+    packet.writeInt32(this.serverId);
+    packet.writeString(this.filename);
+    return packet;
+  }
+}
+
+module.exports = BinlogDump;

login-auth_backend/node_modules/mysql2/lib/packets/binlog_query_statusvars.js

@@ -0,0 +1,115 @@
+'use strict';
+
+// http://dev.mysql.com/doc/internals/en/query-event.html
+
+const keys = {
+  FLAGS2: 0,
+  SQL_MODE: 1,
+  CATALOG: 2,
+  AUTO_INCREMENT: 3,
+  CHARSET: 4,
+  TIME_ZONE: 5,
+  CATALOG_NZ: 6,
+  LC_TIME_NAMES: 7,
+  CHARSET_DATABASE: 8,
+  TABLE_MAP_FOR_UPDATE: 9,
+  MASTER_DATA_WRITTEN: 10,
+  INVOKERS: 11,
+  UPDATED_DB_NAMES: 12,
+  MICROSECONDS: 3,
+};
+
+module.exports = function parseStatusVars(buffer) {
+  const result = {};
+  let offset = 0;
+  let key, length, prevOffset;
+  while (offset < buffer.length) {
+    key = buffer[offset++];
+    switch (key) {
+      case keys.FLAGS2:
+        result.flags = buffer.readUInt32LE(offset);
+        offset += 4;
+        break;
+      case keys.SQL_MODE:
+        // value is 8 bytes, but all dcumented flags are in first 4 bytes
+        result.sqlMode = buffer.readUInt32LE(offset);
+        offset += 8;
+        break;
+      case keys.CATALOG:
+        length = buffer[offset++];
+        result.catalog = buffer.toString('utf8', offset, offset + length);
+        offset += length + 1; // null byte after string
+        break;
+      case keys.CHARSET:
+        result.clientCharset = buffer.readUInt16LE(offset);
+        result.connectionCollation = buffer.readUInt16LE(offset + 2);
+        result.serverCharset = buffer.readUInt16LE(offset + 4);
+        offset += 6;
+        break;
+      case keys.TIME_ZONE:
+        length = buffer[offset++];
+        result.timeZone = buffer.toString('utf8', offset, offset + length);
+        offset += length; // no null byte
+        break;
+      case keys.CATALOG_NZ:
+        length = buffer[offset++];
+        result.catalogNz = buffer.toString('utf8', offset, offset + length);
+        offset += length; // no null byte
+        break;
+      case keys.LC_TIME_NAMES:
+        result.lcTimeNames = buffer.readUInt16LE(offset);
+        offset += 2;
+        break;
+      case keys.CHARSET_DATABASE:
+        result.schemaCharset = buffer.readUInt16LE(offset);
+        offset += 2;
+        break;
+      case keys.TABLE_MAP_FOR_UPDATE:
+        result.mapForUpdate1 = buffer.readUInt32LE(offset);
+        result.mapForUpdate2 = buffer.readUInt32LE(offset + 4);
+        offset += 8;
+        break;
+      case keys.MASTER_DATA_WRITTEN:
+        result.masterDataWritten = buffer.readUInt32LE(offset);
+        offset += 4;
+        break;
+      case keys.INVOKERS:
+        length = buffer[offset++];
+        result.invokerUsername = buffer.toString(
+          'utf8',
+          offset,
+          offset + length
+        );
+        offset += length;
+        length = buffer[offset++];
+        result.invokerHostname = buffer.toString(
+          'utf8',
+          offset,
+          offset + length
+        );
+        offset += length;
+        break;
+      case keys.UPDATED_DB_NAMES:
+        length = buffer[offset++];
+        // length - number of null-terminated strings
+        result.updatedDBs = []; // we'll store them as array here
+        for (; length; --length) {
+          prevOffset = offset;
+          // fast forward to null terminating byte
+          while (buffer[offset++] && offset < buffer.length) {
+            // empty body, everything inside while condition
+          }
+          result.updatedDBs.push(
+            buffer.toString('utf8', prevOffset, offset - 1)
+          );
+        }
+        break;
+      case keys.MICROSECONDS:
+        result.microseconds =
+          // REVIEW: INVALID UNKNOWN VARIABLE!
+          buffer.readInt16LE(offset) + (buffer[offset + 2] << 16);
+        offset += 3;
+    }
+  }
+  return result;
+};

login-auth_backend/node_modules/mysql2/lib/packets/change_user.js

@@ -0,0 +1,97 @@
+'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;

login-auth_backend/node_modules/mysql2/lib/packets/close_statement.js

@@ -0,0 +1,21 @@
+'use strict';
+
+const Packet = require('../packets/packet');
+const CommandCodes = require('../constants/commands');
+
+class CloseStatement {
+  constructor(id) {
+    this.id = id;
+  }
+
+  // note: no response sent back
+  toPacket() {
+    const packet = new Packet(0, Buffer.allocUnsafe(9), 0, 9);
+    packet.offset = 4;
+    packet.writeInt8(CommandCodes.STMT_CLOSE);
+    packet.writeInt32(this.id);
+    return packet;
+  }
+}
+
+module.exports = CloseStatement;

login-auth_backend/node_modules/mysql2/lib/packets/column_definition.js

@@ -0,0 +1,291 @@
+'use strict';
+
+const Packet = require('../packets/packet');
+const StringParser = require('../parsers/string');
+const CharsetToEncoding = require('../constants/charset_encodings.js');
+
+const fields = ['catalog', 'schema', 'table', 'orgTable', 'name', 'orgName'];
+
+// creating JS string is relatively expensive (compared to
+// reading few bytes from buffer) because all string properties
+// except for name are unlikely to be used we postpone
+// string conversion until property access
+//
+// TODO: watch for integration benchmarks (one with real network buffer)
+// there could be bad side effect as keeping reference to a buffer makes it
+// sit in the memory longer (usually until final .query() callback)
+// Latest v8 perform much better in regard to bufferer -> string conversion,
+// at some point of time this optimisation might become unnecessary
+// see https://github.com/sidorares/node-mysql2/pull/137
+//
+class ColumnDefinition {
+  constructor(packet, clientEncoding) {
+    this._buf = packet.buffer;
+    this._clientEncoding = clientEncoding;
+    this._catalogLength = packet.readLengthCodedNumber();
+    this._catalogStart = packet.offset;
+    packet.offset += this._catalogLength;
+    this._schemaLength = packet.readLengthCodedNumber();
+    this._schemaStart = packet.offset;
+    packet.offset += this._schemaLength;
+    this._tableLength = packet.readLengthCodedNumber();
+    this._tableStart = packet.offset;
+    packet.offset += this._tableLength;
+    this._orgTableLength = packet.readLengthCodedNumber();
+    this._orgTableStart = packet.offset;
+    packet.offset += this._orgTableLength;
+    // name is always used, don't make it lazy
+    const _nameLength = packet.readLengthCodedNumber();
+    const _nameStart = packet.offset;
+    packet.offset += _nameLength;
+    this._orgNameLength = packet.readLengthCodedNumber();
+    this._orgNameStart = packet.offset;
+    packet.offset += this._orgNameLength;
+    packet.skip(1); //  length of the following fields (always 0x0c)
+    this.characterSet = packet.readInt16();
+    this.encoding = CharsetToEncoding[this.characterSet];
+    this.name = StringParser.decode(
+      this._buf,
+      this.encoding === 'binary' ? this._clientEncoding : this.encoding,
+      _nameStart,
+      _nameStart + _nameLength
+    );
+    this.columnLength = packet.readInt32();
+    this.columnType = packet.readInt8();
+    this.type = this.columnType;
+    this.flags = packet.readInt16();
+    this.decimals = packet.readInt8();
+  }
+
+  inspect() {
+    return {
+      catalog: this.catalog,
+      schema: this.schema,
+      name: this.name,
+      orgName: this.orgName,
+      table: this.table,
+      orgTable: this.orgTable,
+      characterSet: this.characterSet,
+      encoding: this.encoding,
+      columnLength: this.columnLength,
+      type: this.columnType,
+      flags: this.flags,
+      decimals: this.decimals,
+    };
+  }
+
+  [Symbol.for('nodejs.util.inspect.custom')](depth, inspectOptions, inspect) {
+    const Types = require('../constants/types.js');
+    const typeNames = [];
+    for (const t in Types) {
+      typeNames[Types[t]] = t;
+    }
+    const fiedFlags = require('../constants/field_flags.js');
+    const flagNames = [];
+    // TODO: respect inspectOptions.showHidden
+    //const inspectFlags = inspectOptions.showHidden ? this.flags : this.flags & ~fiedFlags.PRI_KEY;
+    const inspectFlags = this.flags;
+    for (const f in fiedFlags) {
+      if (inspectFlags & fiedFlags[f]) {
+        if (f === 'PRI_KEY') {
+          flagNames.push('PRIMARY KEY');
+        } else if (f === 'NOT_NULL') {
+          flagNames.push('NOT NULL');
+        } else if (f === 'BINARY') {
+          // ignore flag for now
+        } else if (f === 'MULTIPLE_KEY') {
+          // not sure if that should be part of inspection.
+          // in the schema usually this is part of index definition
+          // example: UNIQUE KEY `my_uniq_id` (`id_box_elements`,`id_router`)
+          // note that only first column has MULTIPLE_KEY flag set in this case
+          // so there is no good way of knowing that this is part of index just
+          // by looking at indifidual field flags
+        } else if (f === 'NO_DEFAULT_VALUE') {
+          // almost the same as NOT_NULL?
+        } else if (f === 'BLOB') {
+          // included in the type
+        } else if (f === 'UNSIGNED') {
+          // this should be first after type
+        } else if (f === 'TIMESTAMP') {
+          // timestamp flag is redundant for inspection - already included in type
+        } else if (f === 'ON_UPDATE_NOW') {
+          flagNames.push('ON UPDATE CURRENT_TIMESTAMP');
+        } else {
+          flagNames.push(f);
+        }
+      }
+    }
+
+    if (depth > 1) {
+      return inspect({
+        ...this.inspect(),
+        typeName: typeNames[this.columnType],
+        flags: flagNames,
+      });
+    }
+
+    const isUnsigned = this.flags & fiedFlags.UNSIGNED;
+
+    let typeName = typeNames[this.columnType];
+    if (typeName === 'BLOB') {
+      // TODO: check for non-utf8mb4 encoding
+      if (this.columnLength === 4294967295) {
+        typeName = 'LONGTEXT';
+      } else if (this.columnLength === 67108860) {
+        typeName = 'MEDIUMTEXT';
+      } else if (this.columnLength === 262140) {
+        typeName = 'TEXT';
+      } else if (this.columnLength === 1020) {
+        // 255*4
+        typeName = 'TINYTEXT';
+      } else {
+        typeName = `BLOB(${this.columnLength})`;
+      }
+    } else if (typeName === 'VAR_STRING') {
+      // TODO: check for non-utf8mb4 encoding
+      typeName = `VARCHAR(${Math.ceil(this.columnLength / 4)})`;
+    } else if (typeName === 'TINY') {
+      if (
+        (this.columnLength === 3 && isUnsigned) ||
+        (this.columnLength === 4 && !isUnsigned)
+      ) {
+        typeName = 'TINYINT';
+      } else {
+        typeName = `TINYINT(${this.columnLength})`;
+      }
+    } else if (typeName === 'LONGLONG') {
+      if (this.columnLength === 20) {
+        typeName = 'BIGINT';
+      } else {
+        typeName = `BIGINT(${this.columnLength})`;
+      }
+    } else if (typeName === 'SHORT') {
+      if (isUnsigned && this.columnLength === 5) {
+        typeName = 'SMALLINT';
+      } else if (!isUnsigned && this.columnLength === 6) {
+        typeName = 'SMALLINT';
+      } else {
+        typeName = `SMALLINT(${this.columnLength})`;
+      }
+    } else if (typeName === 'LONG') {
+      if (isUnsigned && this.columnLength === 10) {
+        typeName = 'INT';
+      } else if (!isUnsigned && this.columnLength === 11) {
+        typeName = 'INT';
+      } else {
+        typeName = `INT(${this.columnLength})`;
+      }
+    } else if (typeName === 'INT24') {
+      if (isUnsigned && this.columnLength === 8) {
+        typeName = 'MEDIUMINT';
+      } else if (!isUnsigned && this.columnLength === 9) {
+        typeName = 'MEDIUMINT';
+      } else {
+        typeName = `MEDIUMINT(${this.columnLength})`;
+      }
+    } else if (typeName === 'DOUBLE') {
+      // DOUBLE without modifiers is reported as DOUBLE(22, 31)
+      if (this.columnLength === 22 && this.decimals === 31) {
+        typeName = 'DOUBLE';
+      } else {
+        typeName = `DOUBLE(${this.columnLength},${this.decimals})`;
+      }
+    } else if (typeName === 'FLOAT') {
+      // FLOAT without modifiers is reported as FLOAT(12, 31)
+      if (this.columnLength === 12 && this.decimals === 31) {
+        typeName = 'FLOAT';
+      } else {
+        typeName = `FLOAT(${this.columnLength},${this.decimals})`;
+      }
+    } else if (typeName === 'NEWDECIMAL') {
+      if (this.columnLength === 11 && this.decimals === 0) {
+        typeName = 'DECIMAL';
+      } else if (this.decimals === 0) {
+        // not sure why, but DECIMAL(13) is reported as DECIMAL(14, 0)
+        // and DECIMAL(13, 9) is reported as NEWDECIMAL(15, 9)
+        if (isUnsigned) {
+          typeName = `DECIMAL(${this.columnLength})`;
+        } else {
+          typeName = `DECIMAL(${this.columnLength - 1})`;
+        }
+      } else {
+        typeName = `DECIMAL(${this.columnLength - 2},${this.decimals})`;
+      }
+    } else {
+      typeName = `${typeNames[this.columnType]}(${this.columnLength})`;
+    }
+
+    if (isUnsigned) {
+      typeName += ' UNSIGNED';
+    }
+
+    // TODO respect colors option
+    return `\`${this.name}\` ${[typeName, ...flagNames].join(' ')}`;
+  }
+
+  static toPacket(column, sequenceId) {
+    let length = 17; // = 4 padding + 1 + 12 for the rest
+    fields.forEach((field) => {
+      length += Packet.lengthCodedStringLength(
+        column[field],
+        CharsetToEncoding[column.characterSet]
+      );
+    });
+    const buffer = Buffer.allocUnsafe(length);
+
+    const packet = new Packet(sequenceId, buffer, 0, length);
+    function writeField(name) {
+      packet.writeLengthCodedString(
+        column[name],
+        CharsetToEncoding[column.characterSet]
+      );
+    }
+    packet.offset = 4;
+    fields.forEach(writeField);
+    packet.writeInt8(0x0c);
+    packet.writeInt16(column.characterSet);
+    packet.writeInt32(column.columnLength);
+    packet.writeInt8(column.columnType);
+    packet.writeInt16(column.flags);
+    packet.writeInt8(column.decimals);
+    packet.writeInt16(0); // filler
+    return packet;
+  }
+
+  // node-mysql compatibility: alias "db" to "schema"
+  get db() {
+    return this.schema;
+  }
+}
+
+const addString = function (name) {
+  Object.defineProperty(ColumnDefinition.prototype, name, {
+    get: function () {
+      const start = this[`_${name}Start`];
+      const end = start + this[`_${name}Length`];
+      const val = StringParser.decode(
+        this._buf,
+        this.encoding === 'binary' ? this._clientEncoding : this.encoding,
+        start,
+        end
+      );
+
+      Object.defineProperty(this, name, {
+        value: val,
+        writable: false,
+        configurable: false,
+        enumerable: false,
+      });
+
+      return val;
+    },
+  });
+};
+
+addString('catalog');
+addString('schema');
+addString('table');
+addString('orgTable');
+addString('orgName');
+
+module.exports = ColumnDefinition;

login-auth_backend/node_modules/mysql2/lib/packets/execute.js

@@ -0,0 +1,214 @@
+'use strict';
+
+const CursorType = require('../constants/cursor');
+const CommandCodes = require('../constants/commands');
+const Types = require('../constants/types');
+const Packet = require('../packets/packet');
+const CharsetToEncoding = require('../constants/charset_encodings.js');
+
+function isJSON(value) {
+  return (
+    Array.isArray(value) ||
+    value.constructor === Object ||
+    (typeof value.toJSON === 'function' && !Buffer.isBuffer(value))
+  );
+}
+
+/**
+ * Converts a value to an object describing type, String/Buffer representation and length
+ * @param {*} value
+ */
+function toParameter(value, encoding, timezone) {
+  let type = Types.VAR_STRING;
+  let length;
+  let writer = function (value) {
+    // eslint-disable-next-line no-invalid-this
+    return Packet.prototype.writeLengthCodedString.call(this, value, encoding);
+  };
+  if (value !== null) {
+    switch (typeof value) {
+      case 'undefined':
+        throw new TypeError('Bind parameters must not contain undefined');
+
+      case 'number':
+        type = Types.DOUBLE;
+        length = 8;
+        writer = Packet.prototype.writeDouble;
+        break;
+
+      case 'boolean':
+        value = value | 0;
+        type = Types.TINY;
+        length = 1;
+        writer = Packet.prototype.writeInt8;
+        break;
+
+      case 'object':
+        if (Object.prototype.toString.call(value) === '[object Date]') {
+          type = Types.DATETIME;
+          length = 12;
+          writer = function (value) {
+            // eslint-disable-next-line no-invalid-this
+            return Packet.prototype.writeDate.call(this, value, timezone);
+          };
+        } else if (isJSON(value)) {
+          value = JSON.stringify(value);
+          type = Types.JSON;
+        } else if (Buffer.isBuffer(value)) {
+          length = Packet.lengthCodedNumberLength(value.length) + value.length;
+          writer = Packet.prototype.writeLengthCodedBuffer;
+        }
+        break;
+
+      default:
+        value = value.toString();
+    }
+  } else {
+    value = '';
+    type = Types.NULL;
+  }
+  if (!length) {
+    length = Packet.lengthCodedStringLength(value, encoding);
+  }
+  return { value, type, length, writer };
+}
+
+class Execute {
+  constructor(id, parameters, charsetNumber, timezone) {
+    this.id = id;
+    this.parameters = parameters;
+    this.encoding = CharsetToEncoding[charsetNumber];
+    this.timezone = timezone;
+  }
+
+  static fromPacket(packet, encoding) {
+    const stmtId = packet.readInt32();
+    const flags = packet.readInt8();
+    const iterationCount = packet.readInt32();
+
+    let i = packet.offset;
+    while (i < packet.end - 1) {
+      if (
+        (packet.buffer[i + 1] === Types.VAR_STRING ||
+          packet.buffer[i + 1] === Types.NULL ||
+          packet.buffer[i + 1] === Types.DOUBLE ||
+          packet.buffer[i + 1] === Types.TINY ||
+          packet.buffer[i + 1] === Types.DATETIME ||
+          packet.buffer[i + 1] === Types.JSON) &&
+        packet.buffer[i] === 1 &&
+        packet.buffer[i + 2] === 0
+      ) {
+        break;
+      } else {
+        packet.readInt8();
+      }
+      i++;
+    }
+
+    const types = [];
+
+    for (let i = packet.offset + 1; i < packet.end - 1; i++) {
+      if (
+        (packet.buffer[i] === Types.VAR_STRING ||
+          packet.buffer[i] === Types.NULL ||
+          packet.buffer[i] === Types.DOUBLE ||
+          packet.buffer[i] === Types.TINY ||
+          packet.buffer[i] === Types.DATETIME ||
+          packet.buffer[i] === Types.JSON) &&
+        packet.buffer[i + 1] === 0
+      ) {
+        types.push(packet.buffer[i]);
+        packet.skip(2);
+      }
+    }
+
+    packet.skip(1);
+
+    const values = [];
+    for (let i = 0; i < types.length; i++) {
+      if (types[i] === Types.VAR_STRING) {
+        values.push(packet.readLengthCodedString(encoding));
+      } else if (types[i] === Types.DOUBLE) {
+        values.push(packet.readDouble());
+      } else if (types[i] === Types.TINY) {
+        values.push(packet.readInt8());
+      } else if (types[i] === Types.DATETIME) {
+        values.push(packet.readDateTime());
+      } else if (types[i] === Types.JSON) {
+        values.push(JSON.parse(packet.readLengthCodedString(encoding)));
+      }
+      if (types[i] === Types.NULL) {
+        values.push(null);
+      }
+    }
+
+    return { stmtId, flags, iterationCount, values };
+  }
+
+  toPacket() {
+    // TODO: don't try to calculate packet length in advance, allocate some big buffer in advance (header + 256 bytes?)
+    // and copy + reallocate if not enough
+    // 0 + 4 - length, seqId
+    // 4 + 1 - COM_EXECUTE
+    // 5 + 4 - stmtId
+    // 9 + 1 - flags
+    // 10 + 4 - iteration-count (always 1)
+    let length = 14;
+    let parameters;
+    if (this.parameters && this.parameters.length > 0) {
+      length += Math.floor((this.parameters.length + 7) / 8);
+      length += 1; // new-params-bound-flag
+      length += 2 * this.parameters.length; // type byte for each parameter if new-params-bound-flag is set
+      parameters = this.parameters.map((value) =>
+        toParameter(value, this.encoding, this.timezone)
+      );
+      length += parameters.reduce(
+        (accumulator, parameter) => accumulator + parameter.length,
+        0
+      );
+    }
+    const buffer = Buffer.allocUnsafe(length);
+    const packet = new Packet(0, buffer, 0, length);
+    packet.offset = 4;
+    packet.writeInt8(CommandCodes.STMT_EXECUTE);
+    packet.writeInt32(this.id);
+    packet.writeInt8(CursorType.NO_CURSOR); // flags
+    packet.writeInt32(1); // iteration-count, always 1
+    if (parameters) {
+      let bitmap = 0;
+      let bitValue = 1;
+      parameters.forEach((parameter) => {
+        if (parameter.type === Types.NULL) {
+          bitmap += bitValue;
+        }
+        bitValue *= 2;
+        if (bitValue === 256) {
+          packet.writeInt8(bitmap);
+          bitmap = 0;
+          bitValue = 1;
+        }
+      });
+      if (bitValue !== 1) {
+        packet.writeInt8(bitmap);
+      }
+      // TODO: explain meaning of the flag
+      // afaik, if set n*2 bytes with type of parameter are sent before parameters
+      // if not, previous execution types are used (TODO prooflink)
+      packet.writeInt8(1); // new-params-bound-flag
+      // Write parameter types
+      parameters.forEach((parameter) => {
+        packet.writeInt8(parameter.type); // field type
+        packet.writeInt8(0); // parameter flag
+      });
+      // Write parameter values
+      parameters.forEach((parameter) => {
+        if (parameter.type !== Types.NULL) {
+          parameter.writer.call(packet, parameter.value);
+        }
+      });
+    }
+    return packet;
+  }
+}
+
+module.exports = Execute;

login-auth_backend/node_modules/mysql2/lib/packets/handshake.js

@@ -0,0 +1,112 @@
+'use strict';
+
+const Packet = require('../packets/packet');
+const ClientConstants = require('../constants/client.js');
+
+// https://dev.mysql.com/doc/internals/en/connection-phase-packets.html#packet-Protocol::Handshake
+
+class Handshake {
+  constructor(args) {
+    this.protocolVersion = args.protocolVersion;
+    this.serverVersion = args.serverVersion;
+    this.capabilityFlags = args.capabilityFlags;
+    this.connectionId = args.connectionId;
+    this.authPluginData1 = args.authPluginData1;
+    this.authPluginData2 = args.authPluginData2;
+    this.characterSet = args.characterSet;
+    this.statusFlags = args.statusFlags;
+    this.authPluginName = args.authPluginName;
+  }
+
+  setScrambleData(cb) {
+    require('crypto').randomBytes(20, (err, data) => {
+      if (err) {
+        cb(err);
+        return;
+      }
+      this.authPluginData1 = data.slice(0, 8);
+      this.authPluginData2 = data.slice(8, 20);
+      cb();
+    });
+  }
+
+  toPacket(sequenceId) {
+    const length = 68 + Buffer.byteLength(this.serverVersion, 'utf8');
+    const buffer = Buffer.alloc(length + 4, 0); // zero fill, 10 bytes filler later needs to contain zeros
+    const packet = new Packet(sequenceId, buffer, 0, length + 4);
+    packet.offset = 4;
+    packet.writeInt8(this.protocolVersion);
+    packet.writeString(this.serverVersion, 'cesu8');
+    packet.writeInt8(0);
+    packet.writeInt32(this.connectionId);
+    packet.writeBuffer(this.authPluginData1);
+    packet.writeInt8(0);
+    const capabilityFlagsBuffer = Buffer.allocUnsafe(4);
+    capabilityFlagsBuffer.writeUInt32LE(this.capabilityFlags, 0);
+    packet.writeBuffer(capabilityFlagsBuffer.slice(0, 2));
+    packet.writeInt8(this.characterSet);
+    packet.writeInt16(this.statusFlags);
+    packet.writeBuffer(capabilityFlagsBuffer.slice(2, 4));
+    packet.writeInt8(21); // authPluginDataLength
+    packet.skip(10);
+    packet.writeBuffer(this.authPluginData2);
+    packet.writeInt8(0);
+    packet.writeString('mysql_native_password', 'latin1');
+    packet.writeInt8(0);
+    return packet;
+  }
+
+  static fromPacket(packet) {
+    const args = {};
+    args.protocolVersion = packet.readInt8();
+    args.serverVersion = packet.readNullTerminatedString('cesu8');
+    args.connectionId = packet.readInt32();
+    args.authPluginData1 = packet.readBuffer(8);
+    packet.skip(1);
+    const capabilityFlagsBuffer = Buffer.allocUnsafe(4);
+    capabilityFlagsBuffer[0] = packet.readInt8();
+    capabilityFlagsBuffer[1] = packet.readInt8();
+    if (packet.haveMoreData()) {
+      args.characterSet = packet.readInt8();
+      args.statusFlags = packet.readInt16();
+      // upper 2 bytes
+      capabilityFlagsBuffer[2] = packet.readInt8();
+      capabilityFlagsBuffer[3] = packet.readInt8();
+      args.capabilityFlags = capabilityFlagsBuffer.readUInt32LE(0);
+      if (args.capabilityFlags & ClientConstants.PLUGIN_AUTH) {
+        args.authPluginDataLength = packet.readInt8();
+      } else {
+        args.authPluginDataLength = 0;
+        packet.skip(1);
+      }
+      packet.skip(10);
+    } else {
+      args.capabilityFlags = capabilityFlagsBuffer.readUInt16LE(0);
+    }
+
+    const isSecureConnection =
+      args.capabilityFlags & ClientConstants.SECURE_CONNECTION;
+    if (isSecureConnection) {
+      const authPluginDataLength = args.authPluginDataLength;
+      if (authPluginDataLength === 0) {
+        // for Secure Password Authentication
+        args.authPluginDataLength = 20;
+        args.authPluginData2 = packet.readBuffer(12);
+        packet.skip(1);
+      } else {
+        // length > 0
+        // for Custom Auth Plugin (PLUGIN_AUTH)
+        const len = Math.max(13, authPluginDataLength - 8);
+        args.authPluginData2 = packet.readBuffer(len);
+      }
+    }
+
+    if (args.capabilityFlags & ClientConstants.PLUGIN_AUTH) {
+      args.authPluginName = packet.readNullTerminatedString('ascii');
+    }
+
+    return new Handshake(args);
+  }
+}
+
+module.exports = Handshake;

login-auth_backend/node_modules/mysql2/lib/packets/handshake_response.js

@@ -0,0 +1,144 @@
+'use strict';
+
+const ClientConstants = require('../constants/client.js');
+const CharsetToEncoding = require('../constants/charset_encodings.js');
+const Packet = require('../packets/packet.js');
+
+const auth41 = require('../auth_41.js');
+
+class HandshakeResponse {
+  constructor(handshake) {
+    this.user = handshake.user || '';
+    this.database = handshake.database || '';
+    this.password = handshake.password || '';
+    this.passwordSha1 = handshake.passwordSha1;
+    this.authPluginData1 = handshake.authPluginData1;
+    this.authPluginData2 = handshake.authPluginData2;
+    this.compress = handshake.compress;
+    this.clientFlags = handshake.flags;
+    // TODO: pre-4.1 auth support
+    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 = handshake.charsetNumber;
+    this.encoding = CharsetToEncoding[handshake.charsetNumber];
+    this.connectAttributes = handshake.connectAttributes;
+  }
+
+  serializeResponse(buffer) {
+    const isSet = (flag) => this.clientFlags & ClientConstants[flag];
+    const packet = new Packet(0, buffer, 0, buffer.length);
+    packet.offset = 4;
+    packet.writeInt32(this.clientFlags);
+    packet.writeInt32(0); // max packet size. todo: move to config
+    packet.writeInt8(this.charsetNumber);
+    packet.skip(23);
+    const encoding = this.encoding;
+    packet.writeNullTerminatedString(this.user, encoding);
+    let k;
+    if (isSet('PLUGIN_AUTH_LENENC_CLIENT_DATA')) {
+      packet.writeLengthCodedNumber(this.authToken.length);
+      packet.writeBuffer(this.authToken);
+    } else if (isSet('SECURE_CONNECTION')) {
+      packet.writeInt8(this.authToken.length);
+      packet.writeBuffer(this.authToken);
+    } else {
+      packet.writeBuffer(this.authToken);
+      packet.writeInt8(0);
+    }
+    if (isSet('CONNECT_WITH_DB')) {
+      packet.writeNullTerminatedString(this.database, encoding);
+    }
+    if (isSet('PLUGIN_AUTH')) {
+      // TODO: pass from config
+      packet.writeNullTerminatedString('mysql_native_password', 'latin1');
+    }
+    if (isSet('CONNECT_ATTRS')) {
+      const connectAttributes = this.connectAttributes || {};
+      const attrNames = Object.keys(connectAttributes);
+      let keysLength = 0;
+      for (k = 0; k < attrNames.length; ++k) {
+        keysLength += Packet.lengthCodedStringLength(attrNames[k], encoding);
+        keysLength += Packet.lengthCodedStringLength(
+          connectAttributes[attrNames[k]],
+          encoding
+        );
+      }
+      packet.writeLengthCodedNumber(keysLength);
+      for (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.serializeResponse(Packet.MockBuffer());
+    return this.serializeResponse(Buffer.alloc(p.offset));
+  }
+  static fromPacket(packet) {
+    const args = {};
+    args.clientFlags = packet.readInt32();
+    function isSet(flag) {
+      return args.clientFlags & ClientConstants[flag];
+    }
+    args.maxPacketSize = packet.readInt32();
+    args.charsetNumber = packet.readInt8();
+    const encoding = CharsetToEncoding[args.charsetNumber];
+    args.encoding = encoding;
+    packet.skip(23);
+    args.user = packet.readNullTerminatedString(encoding);
+    let authTokenLength;
+    if (isSet('PLUGIN_AUTH_LENENC_CLIENT_DATA')) {
+      authTokenLength = packet.readLengthCodedNumber(encoding);
+      args.authToken = packet.readBuffer(authTokenLength);
+    } else if (isSet('SECURE_CONNECTION')) {
+      authTokenLength = packet.readInt8();
+      args.authToken = packet.readBuffer(authTokenLength);
+    } else {
+      args.authToken = packet.readNullTerminatedString(encoding);
+    }
+    if (isSet('CONNECT_WITH_DB')) {
+      args.database = packet.readNullTerminatedString(encoding);
+    }
+    if (isSet('PLUGIN_AUTH')) {
+      args.authPluginName = packet.readNullTerminatedString(encoding);
+    }
+    if (isSet('CONNECT_ATTRS')) {
+      const keysLength = packet.readLengthCodedNumber(encoding);
+      const keysEnd = packet.offset + keysLength;
+      const attrs = {};
+      while (packet.offset < keysEnd) {
+        attrs[packet.readLengthCodedString(encoding)] =
+          packet.readLengthCodedString(encoding);
+      }
+      args.connectAttributes = attrs;
+    }
+    return args;
+  }
+}
+
+module.exports = HandshakeResponse;

login-auth_backend/node_modules/mysql2/lib/packets/index.js

@@ -0,0 +1,152 @@
+// This file was modified by Oracle on June 1, 2021.
+// A utility method was introduced to generate an Error instance from a
+// binary server packet.
+// Modifications copyright (c) 2021, Oracle and/or its affiliates.
+
+// This file was modified by Oracle on September 21, 2021.
+// The new AuthNextFactor packet is now available.
+// Modifications copyright (c) 2021, Oracle and/or its affiliates.
+
+'use strict';
+
+const process = require('process');
+
+const AuthNextFactor = require('./auth_next_factor');
+const AuthSwitchRequest = require('./auth_switch_request');
+const AuthSwitchRequestMoreData = require('./auth_switch_request_more_data');
+const AuthSwitchResponse = require('./auth_switch_response');
+const BinaryRow = require('./binary_row');
+const BinlogDump = require('./binlog_dump');
+const ChangeUser = require('./change_user');
+const CloseStatement = require('./close_statement');
+const ColumnDefinition = require('./column_definition');
+const Execute = require('./execute');
+const Handshake = require('./handshake');
+const HandshakeResponse = require('./handshake_response');
+const PrepareStatement = require('./prepare_statement');
+const PreparedStatementHeader = require('./prepared_statement_header');
+const Query = require('./query');
+const RegisterSlave = require('./register_slave');
+const ResultSetHeader = require('./resultset_header');
+const SSLRequest = require('./ssl_request');
+const TextRow = require('./text_row');
+
+const ctorMap = {
+  AuthNextFactor,
+  AuthSwitchRequest,
+  AuthSwitchRequestMoreData,
+  AuthSwitchResponse,
+  BinaryRow,
+  BinlogDump,
+  ChangeUser,
+  CloseStatement,
+  ColumnDefinition,
+  Execute,
+  Handshake,
+  HandshakeResponse,
+  PrepareStatement,
+  PreparedStatementHeader,
+  Query,
+  RegisterSlave,
+  ResultSetHeader,
+  SSLRequest,
+  TextRow,
+};
+Object.entries(ctorMap).forEach(([name, ctor]) => {
+  module.exports[name] = ctor;
+  // monkey-patch it to include name if debug is on
+  if (process.env.NODE_DEBUG) {
+    if (ctor.prototype.toPacket) {
+      const old = ctor.prototype.toPacket;
+      ctor.prototype.toPacket = function () {
+        const p = old.call(this);
+        p._name = name;
+        return p;
+      };
+    }
+  }
+});
+
+// simple packets:
+const Packet = require('./packet');
+exports.Packet = Packet;
+
+class OK {
+  static toPacket(args, encoding) {
+    args = args || {};
+    const affectedRows = args.affectedRows || 0;
+    const insertId = args.insertId || 0;
+    const serverStatus = args.serverStatus || 0;
+    const warningCount = args.warningCount || 0;
+    const message = args.message || '';
+
+    let length = 9 + Packet.lengthCodedNumberLength(affectedRows);
+    length += Packet.lengthCodedNumberLength(insertId);
+
+    const buffer = Buffer.allocUnsafe(length);
+    const packet = new Packet(0, buffer, 0, length);
+    packet.offset = 4;
+    packet.writeInt8(0);
+    packet.writeLengthCodedNumber(affectedRows);
+    packet.writeLengthCodedNumber(insertId);
+    packet.writeInt16(serverStatus);
+    packet.writeInt16(warningCount);
+    packet.writeString(message, encoding);
+    packet._name = 'OK';
+    return packet;
+  }
+}
+
+exports.OK = OK;
+
+// warnings, statusFlags
+class EOF {
+  static toPacket(warnings, statusFlags) {
+    if (typeof warnings === 'undefined') {
+      warnings = 0;
+    }
+    if (typeof statusFlags === 'undefined') {
+      statusFlags = 0;
+    }
+    const packet = new Packet(0, Buffer.allocUnsafe(9), 0, 9);
+    packet.offset = 4;
+    packet.writeInt8(0xfe);
+    packet.writeInt16(warnings);
+    packet.writeInt16(statusFlags);
+    packet._name = 'EOF';
+    return packet;
+  }
+}
+
+exports.EOF = EOF;
+
+class Error {
+  static toPacket(args, encoding) {
+    const length = 13 + Buffer.byteLength(args.message, 'utf8');
+    const packet = new Packet(0, Buffer.allocUnsafe(length), 0, length);
+    packet.offset = 4;
+    packet.writeInt8(0xff);
+    packet.writeInt16(args.code);
+    // TODO: sql state parameter
+    packet.writeString('#_____', encoding);
+    packet.writeString(args.message, encoding);
+    packet._name = 'Error';
+    return packet;
+  }
+
+  static fromPacket(packet) {
+    packet.readInt8(); // marker
+    const code = packet.readInt16();
+    packet.readString(1, 'ascii'); // sql state marker
+    // The SQL state of the ERR_Packet which is always 5 bytes long.
+    // https://dev.mysql.com/doc/dev/mysql-server/8.0.11/page_protocol_basic_dt_strings.html#sect_protocol_basic_dt_string_fix
+    packet.readString(5, 'ascii'); // sql state (ignore for now)
+    const message = packet.readNullTerminatedString('utf8');
+    const error = new Error();
+    error.message = message;
+    error.code = code;
+    return error;
+  }
+}
+
+exports.Error = Error;

login-auth_backend/node_modules/mysql2/lib/packets/packet.js

@@ -0,0 +1,931 @@
+// This file was modified by Oracle on June 1, 2021.
+// A comment describing some changes in the strict default SQL mode regarding
+// non-standard dates was introduced.
+// Modifications copyright (c) 2021, Oracle and/or its affiliates.
+
+'use strict';
+
+const ErrorCodeToName = require('../constants/errors.js');
+const NativeBuffer = require('buffer').Buffer;
+const Long = require('long');
+const StringParser = require('../parsers/string.js');
+const Types = require('../constants/types.js');
+const INVALID_DATE = new Date(NaN);
+
+// this is nearly duplicate of previous function so generated code is not slower
+// due to "if (dateStrings)" branching
+const pad = '000000000000';
+function leftPad(num, value) {
+  const s = value.toString();
+  // if we don't need to pad
+  if (s.length >= num) {
+    return s;
+  }
+  return (pad + s).slice(-num);
+}
+
+// The whole reason parse* function below exist
+// is because String creation is relatively expensive (at least with V8), and if we have
+// a buffer with "12345" content ideally we would like to bypass intermediate
+// "12345" string creation and directly build 12345 number out of
+// <Buffer 31 32 33 34 35> data.
+// In my benchmarks the difference is ~25M 8-digit numbers per second vs
+// 4.5 M using Number(packet.readLengthCodedString())
+// not used when size is close to max precision as series of *10 accumulate error
+// and approximate result mihgt be diffreent from (approximate as well) Number(bigNumStringValue))
+// In the futire node version if speed difference is smaller parse* functions might be removed
+// don't consider them as Packet public API
+
+const minus = '-'.charCodeAt(0);
+const plus = '+'.charCodeAt(0);
+
+// TODO: handle E notation
+const dot = '.'.charCodeAt(0);
+const exponent = 'e'.charCodeAt(0);
+const exponentCapital = 'E'.charCodeAt(0);
+
+class Packet {
+  constructor(id, buffer, start, end) {
+    // hot path, enable checks when testing only
+    // if (!Buffer.isBuffer(buffer) || typeof start == 'undefined' || typeof end == 'undefined')
+    //  throw new Error('invalid packet');
+    this.sequenceId = id;
+    this.numPackets = 1;
+    this.buffer = buffer;
+    this.start = start;
+    this.offset = start + 4;
+    this.end = end;
+  }
+
+  // ==============================
+  // readers
+  // ==============================
+  reset() {
+    this.offset = this.start + 4;
+  }
+
+  length() {
+    return this.end - this.start;
+  }
+
+  slice() {
+    return this.buffer.slice(this.start, this.end);
+  }
+
+  dump() {
+    // eslint-disable-next-line no-console
+    console.log(
+      [this.buffer.asciiSlice(this.start, this.end)],
+      this.buffer.slice(this.start, this.end),
+      this.length(),
+      this.sequenceId
+    );
+  }
+
+  haveMoreData() {
+    return this.end > this.offset;
+  }
+
+  skip(num) {
+    this.offset += num;
+  }
+
+  readInt8() {
+    return this.buffer[this.offset++];
+  }
+
+  readInt16() {
+    this.offset += 2;
+    return this.buffer.readUInt16LE(this.offset - 2);
+  }
+
+  readInt24() {
+    return this.readInt16() + (this.readInt8() << 16);
+  }
+
+  readInt32() {
+    this.offset += 4;
+    return this.buffer.readUInt32LE(this.offset - 4);
+  }
+
+  readSInt8() {
+    return this.buffer.readInt8(this.offset++);
+  }
+
+  readSInt16() {
+    this.offset += 2;
+    return this.buffer.readInt16LE(this.offset - 2);
+  }
+
+  readSInt32() {
+    this.offset += 4;
+    return this.buffer.readInt32LE(this.offset - 4);
+  }
+
+  readInt64JSNumber() {
+    const word0 = this.readInt32();
+    const word1 = this.readInt32();
+    const l = new Long(word0, word1, true);
+    return l.toNumber();
+  }
+
+  readSInt64JSNumber() {
+    const word0 = this.readInt32();
+    const word1 = this.readInt32();
+    if (!(word1 & 0x80000000)) {
+      return word0 + 0x100000000 * word1;
+    }
+    const l = new Long(word0, word1, false);
+    return l.toNumber();
+  }
+
+  readInt64String() {
+    const word0 = this.readInt32();
+    const word1 = this.readInt32();
+    const res = new Long(word0, word1, true);
+    return res.toString();
+  }
+
+  readSInt64String() {
+    const word0 = this.readInt32();
+    const word1 = this.readInt32();
+    const res = new Long(word0, word1, false);
+    return res.toString();
+  }
+
+  readInt64() {
+    const word0 = this.readInt32();
+    const word1 = this.readInt32();
+    let res = new Long(word0, word1, true);
+    const resNumber = res.toNumber();
+    const resString = res.toString();
+    res = resNumber.toString() === resString ? resNumber : resString;
+    return res;
+  }
+
+  readSInt64() {
+    const word0 = this.readInt32();
+    const word1 = this.readInt32();
+    let res = new Long(word0, word1, false);
+    const resNumber = res.toNumber();
+    const resString = res.toString();
+    res = resNumber.toString() === resString ? resNumber : resString;
+    return res;
+  }
+
+  isEOF() {
+    return this.buffer[this.offset] === 0xfe && this.length() < 13;
+  }
+
+  eofStatusFlags() {
+    return this.buffer.readInt16LE(this.offset + 3);
+  }
+
+  eofWarningCount() {
+    return this.buffer.readInt16LE(this.offset + 1);
+  }
+
+  readLengthCodedNumber(bigNumberStrings, signed) {
+    const byte1 = this.buffer[this.offset++];
+    if (byte1 < 251) {
+      return byte1;
+    }
+    return this.readLengthCodedNumberExt(byte1, bigNumberStrings, signed);
+  }
+
+  readLengthCodedNumberSigned(bigNumberStrings) {
+    return this.readLengthCodedNumber(bigNumberStrings, true);
+  }
+
+  readLengthCodedNumberExt(tag, bigNumberStrings, signed) {
+    let word0, word1;
+    let res;
+    if (tag === 0xfb) {
+      return null;
+    }
+    if (tag === 0xfc) {
+      return this.readInt8() + (this.readInt8() << 8);
+    }
+    if (tag === 0xfd) {
+      return this.readInt8() + (this.readInt8() << 8) + (this.readInt8() << 16);
+    }
+    if (tag === 0xfe) {
+      // TODO: check version
+      // Up to MySQL 3.22, 0xfe was followed by a 4-byte integer.
+      word0 = this.readInt32();
+      word1 = this.readInt32();
+      if (word1 === 0) {
+        return word0; // don't convert to float if possible
+      }
+      if (word1 < 2097152) {
+        // max exact float point int, 2^52 / 2^32
+        return word1 * 0x100000000 + word0;
+      }
+      res = new Long(word0, word1, !signed); // Long need unsigned
+      const resNumber = res.toNumber();
+      const resString = res.toString();
+      res = resNumber.toString() === resString ? resNumber : resString;
+      return bigNumberStrings ? resString : res;
+    }
+    // eslint-disable-next-line no-console
+    console.trace();
+    throw new Error(`Should not reach here: ${tag}`);
+  }
+
+  readFloat() {
+    const res = this.buffer.readFloatLE(this.offset);
+    this.offset += 4;
+    return res;
+  }
+
+  readDouble() {
+    const res = this.buffer.readDoubleLE(this.offset);
+    this.offset += 8;
+    return res;
+  }
+
+  readBuffer(len) {
+    if (typeof len === 'undefined') {
+      len = this.end - this.offset;
+    }
+    this.offset += len;
+    return this.buffer.slice(this.offset - len, this.offset);
+  }
+
+  // DATE, DATETIME and TIMESTAMP
+  readDateTime(timezone) {
+    if (!timezone || timezone === 'Z' || timezone === 'local') {
+      const length = this.readInt8();
+      if (length === 0xfb) {
+        return null;
+      }
+      let y = 0;
+      let m = 0;
+      let d = 0;
+      let H = 0;
+      let M = 0;
+      let S = 0;
+      let ms = 0;
+      if (length > 3) {
+        y = this.readInt16();
+        m = this.readInt8();
+        d = this.readInt8();
+      }
+      if (length > 6) {
+        H = this.readInt8();
+        M = this.readInt8();
+        S = this.readInt8();
+      }
+      if (length > 10) {
+        ms = this.readInt32() / 1000;
+      }
+      // NO_ZERO_DATE mode and NO_ZERO_IN_DATE mode are part of the strict
+      // default SQL mode used by MySQL 8.0. This means that non-standard
+      // dates like '0000-00-00' become NULL. For older versions and other
+      // possible MySQL flavours we still need to account for the
+      // non-standard behaviour.
+      if (y + m + d + H + M + S + ms === 0) {
+        return INVALID_DATE;
+      }
+      if (timezone === 'Z') {
+        return new Date(Date.UTC(y, m - 1, d, H, M, S, ms));
+      }
+      return new Date(y, m - 1, d, H, M, S, ms);
+    }
+    let str = this.readDateTimeString(6, 'T', null);
+    if (str.length === 10) {
+      str += 'T00:00:00';
+    }
+    return new Date(str + timezone);
+  }
+
+  readDateTimeString(decimals, timeSep, columnType) {
+    const length = this.readInt8();
+    let y = 0;
+    let m = 0;
+    let d = 0;
+    let H = 0;
+    let M = 0;
+    let S = 0;
+    let ms = 0;
+    let str;
+    if (length > 3) {
+      y = this.readInt16();
+      m = this.readInt8();
+      d = this.readInt8();
+      str = [leftPad(4, y), leftPad(2, m), leftPad(2, d)].join('-');
+    }
+    if (length > 6) {
+      H = this.readInt8();
+      M = this.readInt8();
+      S = this.readInt8();
+      str += `${timeSep || ' '}${[
+        leftPad(2, H),
+        leftPad(2, M),
+        leftPad(2, S),
+      ].join(':')}`;
+    } else if (columnType === Types.DATETIME) {
+      str += ' 00:00:00';
+    }
+    if (length > 10) {
+      ms = this.readInt32();
+      str += '.';
+      if (decimals) {
+        ms = leftPad(6, ms);
+        if (ms.length > decimals) {
+          ms = ms.substring(0, decimals); // rounding is done at the MySQL side, only 0 are here
+        }
+      }
+      str += ms;
+    }
+    return str;
+  }
+
+  // TIME - value as a string, Can be negative
+  readTimeString(convertTtoMs) {
+    const length = this.readInt8();
+    if (length === 0) {
+      return '00:00:00';
+    }
+    const sign = this.readInt8() ? -1 : 1; // 'isNegative' flag byte
+    let d = 0;
+    let H = 0;
+    let M = 0;
+    let S = 0;
+    let ms = 0;
+    if (length > 6) {
+      d = this.readInt32();
+      H = this.readInt8();
+      M = this.readInt8();
+      S = this.readInt8();
+    }
+    if (length > 10) {
+      ms = this.readInt32();
+    }
+    if (convertTtoMs) {
+      H += d * 24;
+      M += H * 60;
+      S += M * 60;
+      ms += S * 1000;
+      ms *= sign;
+      return ms;
+    }
+    // Format follows mySQL TIME format ([-][h]hh:mm:ss[.u[u[u[u[u[u]]]]]])
+    // For positive times below 24 hours, this makes it equal to ISO 8601 times
+    return (
+      (sign === -1 ? '-' : '') +
+      [leftPad(2, d * 24 + H), leftPad(2, M), leftPad(2, S)].join(':') +
+      (ms ? `.${ms}`.replace(/0+$/, '') : '')
+    );
+  }
+
+  readLengthCodedString(encoding) {
+    const len = this.readLengthCodedNumber();
+    // TODO: check manually first byte here to avoid polymorphic return type?
+    if (len === null) {
+      return null;
+    }
+    this.offset += len;
+    // TODO: Use characterSetCode to get proper encoding
+    // https://github.com/sidorares/node-mysql2/pull/374
+    return StringParser.decode(
+      this.buffer,
+      encoding,
+      this.offset - len,
+      this.offset
+    );
+  }
+
+  readLengthCodedBuffer() {
+    const len = this.readLengthCodedNumber();
+    if (len === null) {
+      return null;
+    }
+    return this.readBuffer(len);
+  }
+
+  readNullTerminatedString(encoding) {
+    const start = this.offset;
+    let end = this.offset;
+    while (this.buffer[end]) {
+      end = end + 1; // TODO: handle OOB check
+    }
+    this.offset = end + 1;
+    return StringParser.decode(this.buffer, encoding, start, end);
+  }
+
+  // TODO reuse?
+  readString(len, encoding) {
+    if (typeof len === 'string' && typeof encoding === 'undefined') {
+      encoding = len;
+      len = undefined;
+    }
+    if (typeof len === 'undefined') {
+      len = this.end - this.offset;
+    }
+    this.offset += len;
+    return StringParser.decode(
+      this.buffer,
+      encoding,
+      this.offset - len,
+      this.offset
+    );
+  }
+
+  parseInt(len, supportBigNumbers) {
+    if (len === null) {
+      return null;
+    }
+    if (len >= 14 && !supportBigNumbers) {
+      const s = this.buffer.toString('ascii', this.offset, this.offset + len);
+      this.offset += len;
+      return Number(s);
+    }
+    let result = 0;
+    const start = this.offset;
+    const end = this.offset + len;
+    let sign = 1;
+    if (len === 0) {
+      return 0; // TODO: assert? exception?
+    }
+    if (this.buffer[this.offset] === minus) {
+      this.offset++;
+      sign = -1;
+    }
+    // max precise int is 9007199254740992
+    let str;
+    const numDigits = end - this.offset;
+    if (supportBigNumbers) {
+      if (numDigits >= 15) {
+        str = this.readString(end - this.offset, 'binary');
+        result = parseInt(str, 10);
+        if (result.toString() === str) {
+          return sign * result;
+        }
+        return sign === -1 ? `-${str}` : str;
+      }
+      if (numDigits > 16) {
+        str = this.readString(end - this.offset);
+        return sign === -1 ? `-${str}` : str;
+      }
+    }
+    if (this.buffer[this.offset] === plus) {
+      this.offset++; // just ignore
+    }
+    while (this.offset < end) {
+      result *= 10;
+      result += this.buffer[this.offset] - 48;
+      this.offset++;
+    }
+    const num = result * sign;
+    if (!supportBigNumbers) {
+      return num;
+    }
+    str = this.buffer.toString('ascii', start, end);
+    if (num.toString() === str) {
+      return num;
+    }
+    return str;
+  }
+
+  // note that if value of inputNumberAsString is bigger than MAX_SAFE_INTEGER
+  // ( or smaller than MIN_SAFE_INTEGER ) the parseIntNoBigCheck result might be
+  // different from what you would get from Number(inputNumberAsString)
+  // String(parseIntNoBigCheck) <> String(Number(inputNumberAsString)) <> inputNumberAsString
+  parseIntNoBigCheck(len) {
+    if (len === null) {
+      return null;
+    }
+    let result = 0;
+    const end = this.offset + len;
+    let sign = 1;
+    if (len === 0) {
+      return 0; // TODO: assert? exception?
+    }
+    if (this.buffer[this.offset] === minus) {
+      this.offset++;
+      sign = -1;
+    }
+    if (this.buffer[this.offset] === plus) {
+      this.offset++; // just ignore
+    }
+    while (this.offset < end) {
+      result *= 10;
+      result += this.buffer[this.offset] - 48;
+      this.offset++;
+    }
+    return result * sign;
+  }
+
+  // copy-paste from https://github.com/mysqljs/mysql/blob/master/lib/protocol/Parser.js
+  parseGeometryValue() {
+    const buffer = this.readLengthCodedBuffer();
+    let offset = 4;
+    if (buffer === null || !buffer.length) {
+      return null;
+    }
+    function parseGeometry() {
+      let x, y, i, j, numPoints, line;
+      let result = null;
+      const byteOrder = buffer.readUInt8(offset);
+      offset += 1;
+      const wkbType = byteOrder
+        ? buffer.readUInt32LE(offset)
+        : buffer.readUInt32BE(offset);
+      offset += 4;
+      switch (wkbType) {
+        case 1: // WKBPoint
+          x = byteOrder
+            ? buffer.readDoubleLE(offset)
+            : buffer.readDoubleBE(offset);
+          offset += 8;
+          y = byteOrder
+            ? buffer.readDoubleLE(offset)
+            : buffer.readDoubleBE(offset);
+          offset += 8;
+          result = { x: x, y: y };
+          break;
+        case 2: // WKBLineString
+          numPoints = byteOrder
+            ? buffer.readUInt32LE(offset)
+            : buffer.readUInt32BE(offset);
+          offset += 4;
+          result = [];
+          for (i = numPoints; i > 0; i--) {
+            x = byteOrder
+              ? buffer.readDoubleLE(offset)
+              : buffer.readDoubleBE(offset);
+            offset += 8;
+            y = byteOrder
+              ? buffer.readDoubleLE(offset)
+              : buffer.readDoubleBE(offset);
+            offset += 8;
+            result.push({ x: x, y: y });
+          }
+          break;
+        case 3: // WKBPolygon
+          // eslint-disable-next-line no-case-declarations
+          const numRings = byteOrder
+            ? buffer.readUInt32LE(offset)
+            : buffer.readUInt32BE(offset);
+          offset += 4;
+          result = [];
+          for (i = numRings; i > 0; i--) {
+            numPoints = byteOrder
+              ? buffer.readUInt32LE(offset)
+              : buffer.readUInt32BE(offset);
+            offset += 4;
+            line = [];
+            for (j = numPoints; j > 0; j--) {
+              x = byteOrder
+                ? buffer.readDoubleLE(offset)
+                : buffer.readDoubleBE(offset);
+              offset += 8;
+              y = byteOrder
+                ? buffer.readDoubleLE(offset)
+                : buffer.readDoubleBE(offset);
+              offset += 8;
+              line.push({ x: x, y: y });
+            }
+            result.push(line);
+          }
+          break;
+        case 4: // WKBMultiPoint
+        case 5: // WKBMultiLineString
+        case 6: // WKBMultiPolygon
+        case 7: // WKBGeometryCollection
+          // eslint-disable-next-line no-case-declarations
+          const num = byteOrder
+            ? buffer.readUInt32LE(offset)
+            : buffer.readUInt32BE(offset);
+          offset += 4;
+          result = [];
+          for (i = num; i > 0; i--) {
+            result.push(parseGeometry());
+          }
+          break;
+      }
+      return result;
+    }
+    return parseGeometry();
+  }
+
+  parseVector() {
+    const bufLen = this.readLengthCodedNumber();
+    const vectorEnd = this.offset + bufLen;
+    const result = [];
+    while (this.offset < vectorEnd && this.offset < this.end) {
+      result.push(this.readFloat());
+    }
+    return result;
+  }
+
+  parseDate(timezone) {
+    const strLen = this.readLengthCodedNumber();
+    if (strLen === null) {
+      return null;
+    }
+    if (strLen !== 10) {
+      // we expect only YYYY-MM-DD here.
+      // if for some reason it's not the case return invalid date
+      return new Date(NaN);
+    }
+    const y = this.parseInt(4);
+    this.offset++; // -
+    const m = this.parseInt(2);
+    this.offset++; // -
+    const d = this.parseInt(2);
+    if (!timezone || timezone === 'local') {
+      return new Date(y, m - 1, d);
+    }
+    if (timezone === 'Z') {
+      return new Date(Date.UTC(y, m - 1, d));
+    }
+    return new Date(
+      `${leftPad(4, y)}-${leftPad(2, m)}-${leftPad(2, d)}T00:00:00${timezone}`
+    );
+  }
+
+  parseDateTime(timezone) {
+    const str = this.readLengthCodedString('binary');
+    if (str === null) {
+      return null;
+    }
+    if (!timezone || timezone === 'local') {
+      return new Date(str);
+    }
+    return new Date(`${str}${timezone}`);
+  }
+
+  parseFloat(len) {
+    if (len === null) {
+      return null;
+    }
+    let result = 0;
+    const end = this.offset + len;
+    let factor = 1;
+    let pastDot = false;
+    let charCode = 0;
+    if (len === 0) {
+      return 0; // TODO: assert? exception?
+    }
+    if (this.buffer[this.offset] === minus) {
+      this.offset++;
+      factor = -1;
+    }
+    if (this.buffer[this.offset] === plus) {
+      this.offset++; // just ignore
+    }
+    while (this.offset < end) {
+      charCode = this.buffer[this.offset];
+      if (charCode === dot) {
+        pastDot = true;
+        this.offset++;
+      } else if (charCode === exponent || charCode === exponentCapital) {
+        this.offset++;
+        const exponentValue = this.parseInt(end - this.offset);
+        return (result / factor) * Math.pow(10, exponentValue);
+      } else {
+        result *= 10;
+        result += this.buffer[this.offset] - 48;
+        this.offset++;
+        if (pastDot) {
+          factor = factor * 10;
+        }
+      }
+    }
+    return result / factor;
+  }
+
+  parseLengthCodedIntNoBigCheck() {
+    return this.parseIntNoBigCheck(this.readLengthCodedNumber());
+  }
+
+  parseLengthCodedInt(supportBigNumbers) {
+    return this.parseInt(this.readLengthCodedNumber(), supportBigNumbers);
+  }
+
+  parseLengthCodedIntString() {
+    return this.readLengthCodedString('binary');
+  }
+
+  parseLengthCodedFloat() {
+    return this.parseFloat(this.readLengthCodedNumber());
+  }
+
+  peekByte() {
+    return this.buffer[this.offset];
+  }
+
+  // OxFE is often used as "Alt" flag - not ok, not error.
+  // For example, it's first byte of AuthSwitchRequest
+  isAlt() {
+    return this.peekByte() === 0xfe;
+  }
+
+  isError() {
+    return this.peekByte() === 0xff;
+  }
+
+  asError(encoding) {
+    this.reset();
+    this.readInt8(); // fieldCount
+    const errorCode = this.readInt16();
+    let sqlState = '';
+    if (this.buffer[this.offset] === 0x23) {
+      this.skip(1);
+      sqlState = this.readBuffer(5).toString();
+    }
+    const message = this.readString(undefined, encoding);
+    const err = new Error(message);
+    err.code = ErrorCodeToName[errorCode];
+    err.errno = errorCode;
+    err.sqlState = sqlState;
+    err.sqlMessage = message;
+    return err;
+  }
+
+  writeInt32(n) {
+    this.buffer.writeUInt32LE(n, this.offset);
+    this.offset += 4;
+  }
+
+  writeInt24(n) {
+    this.writeInt8(n & 0xff);
+    this.writeInt16(n >> 8);
+  }
+
+  writeInt16(n) {
+    this.buffer.writeUInt16LE(n, this.offset);
+    this.offset += 2;
+  }
+
+  writeInt8(n) {
+    this.buffer.writeUInt8(n, this.offset);
+    this.offset++;
+  }
+
+  writeDouble(n) {
+    this.buffer.writeDoubleLE(n, this.offset);
+    this.offset += 8;
+  }
+
+  writeBuffer(b) {
+    b.copy(this.buffer, this.offset);
+    this.offset += b.length;
+  }
+
+  writeNull() {
+    this.buffer[this.offset] = 0xfb;
+    this.offset++;
+  }
+
+  // TODO: refactor following three?
+  writeNullTerminatedString(s, encoding) {
+    const buf = StringParser.encode(s, encoding);
+    this.buffer.length && buf.copy(this.buffer, this.offset);
+    this.offset += buf.length;
+    this.writeInt8(0);
+  }
+
+  writeString(s, encoding) {
+    if (s === null) {
+      this.writeInt8(0xfb);
+      return;
+    }
+    if (s.length === 0) {
+      return;
+    }
+    // const bytes = Buffer.byteLength(s, 'utf8');
+    // this.buffer.write(s, this.offset, bytes, 'utf8');
+    // this.offset += bytes;
+    const buf = StringParser.encode(s, encoding);
+    this.buffer.length && buf.copy(this.buffer, this.offset);
+    this.offset += buf.length;
+  }
+
+  writeLengthCodedString(s, encoding) {
+    const buf = StringParser.encode(s, encoding);
+    this.writeLengthCodedNumber(buf.length);
+    this.buffer.length && buf.copy(this.buffer, this.offset);
+    this.offset += buf.length;
+  }
+
+  writeLengthCodedBuffer(b) {
+    this.writeLengthCodedNumber(b.length);
+    b.copy(this.buffer, this.offset);
+    this.offset += b.length;
+  }
+
+  writeLengthCodedNumber(n) {
+    if (n < 0xfb) {
+      return this.writeInt8(n);
+    }
+    if (n < 0xffff) {
+      this.writeInt8(0xfc);
+      return this.writeInt16(n);
+    }
+    if (n < 0xffffff) {
+      this.writeInt8(0xfd);
+      return this.writeInt24(n);
+    }
+    if (n === null) {
+      return this.writeInt8(0xfb);
+    }
+    // TODO: check that n is out of int precision
+    this.writeInt8(0xfe);
+    this.buffer.writeUInt32LE(n, this.offset);
+    this.offset += 4;
+    this.buffer.writeUInt32LE(n >> 32, this.offset);
+    this.offset += 4;
+    return this.offset;
+  }
+
+  writeDate(d, timezone) {
+    this.buffer.writeUInt8(11, this.offset);
+    if (!timezone || timezone === 'local') {
+      this.buffer.writeUInt16LE(d.getFullYear(), this.offset + 1);
+      this.buffer.writeUInt8(d.getMonth() + 1, this.offset + 3);
+      this.buffer.writeUInt8(d.getDate(), this.offset + 4);
+      this.buffer.writeUInt8(d.getHours(), this.offset + 5);
+      this.buffer.writeUInt8(d.getMinutes(), this.offset + 6);
+      this.buffer.writeUInt8(d.getSeconds(), this.offset + 7);
+      this.buffer.writeUInt32LE(d.getMilliseconds() * 1000, this.offset + 8);
+    } else {
+      if (timezone !== 'Z') {
+        const offset =
+          (timezone[0] === '-' ? -1 : 1) *
+          (parseInt(timezone.substring(1, 3), 10) * 60 +
+            parseInt(timezone.substring(4), 10));
+        if (offset !== 0) {
+          d = new Date(d.getTime() + 60000 * offset);
+        }
+      }
+      this.buffer.writeUInt16LE(d.getUTCFullYear(), this.offset + 1);
+      this.buffer.writeUInt8(d.getUTCMonth() + 1, this.offset + 3);
+      this.buffer.writeUInt8(d.getUTCDate(), this.offset + 4);
+      this.buffer.writeUInt8(d.getUTCHours(), this.offset + 5);
+      this.buffer.writeUInt8(d.getUTCMinutes(), this.offset + 6);
+      this.buffer.writeUInt8(d.getUTCSeconds(), this.offset + 7);
+      this.buffer.writeUInt32LE(d.getUTCMilliseconds() * 1000, this.offset + 8);
+    }
+    this.offset += 12;
+  }
+
+  writeHeader(sequenceId) {
+    const offset = this.offset;
+    this.offset = 0;
+    this.writeInt24(this.buffer.length - 4);
+    this.writeInt8(sequenceId);
+    this.offset = offset;
+  }
+
+  clone() {
+    return new Packet(this.sequenceId, this.buffer, this.start, this.end);
+  }
+
+  type() {
+    if (this.isEOF()) {
+      return 'EOF';
+    }
+    if (this.isError()) {
+      return 'Error';
+    }
+    if (this.buffer[this.offset] === 0) {
+      return 'maybeOK'; // could be other packet types as well
+    }
+    return '';
+  }
+
+  static lengthCodedNumberLength(n) {
+    if (n < 0xfb) {
+      return 1;
+    }
+    if (n < 0xffff) {
+      return 3;
+    }
+    if (n < 0xffffff) {
+      return 5;
+    }
+    return 9;
+  }
+
+  static lengthCodedStringLength(str, encoding) {
+    const buf = StringParser.encode(str, encoding);
+    const slen = buf.length;
+    return Packet.lengthCodedNumberLength(slen) + slen;
+  }
+
+  static MockBuffer() {
+    const noop = function () {};
+    const res = Buffer.alloc(0);
+    for (const op in NativeBuffer.prototype) {
+      if (typeof res[op] === 'function') {
+        res[op] = noop;
+      }
+    }
+    return res;
+  }
+}
+
+module.exports = Packet;

login-auth_backend/node_modules/mysql2/lib/packets/prepare_statement.js

@@ -0,0 +1,27 @@
+'use strict';
+
+const Packet = require('../packets/packet');
+const CommandCodes = require('../constants/commands');
+const StringParser = require('../parsers/string.js');
+const CharsetToEncoding = require('../constants/charset_encodings.js');
+
+class PrepareStatement {
+  constructor(sql, charsetNumber) {
+    this.query = sql;
+    this.charsetNumber = charsetNumber;
+    this.encoding = CharsetToEncoding[charsetNumber];
+  }
+
+  toPacket() {
+    const buf = StringParser.encode(this.query, this.encoding);
+    const length = 5 + buf.length;
+    const buffer = Buffer.allocUnsafe(length);
+    const packet = new Packet(0, buffer, 0, length);
+    packet.offset = 4;
+    packet.writeInt8(CommandCodes.STMT_PREPARE);
+    packet.writeBuffer(buf);
+    return packet;
+  }
+}
+
+module.exports = PrepareStatement;

login-auth_backend/node_modules/mysql2/lib/packets/prepared_statement_header.js

@@ -0,0 +1,16 @@
+'use strict';
+
+class PreparedStatementHeader {
+  constructor(packet) {
+    packet.skip(1); // should be 0
+    this.id = packet.readInt32();
+    this.fieldCount = packet.readInt16();
+    this.parameterCount = packet.readInt16();
+    packet.skip(1); // should be 0
+    this.warningCount = packet.readInt16();
+  }
+}
+
+// TODO: toPacket
+
+module.exports = PreparedStatementHeader;

login-auth_backend/node_modules/mysql2/lib/packets/query.js

@@ -0,0 +1,27 @@
+'use strict';
+
+const Packet = require('../packets/packet.js');
+const CommandCode = require('../constants/commands.js');
+const StringParser = require('../parsers/string.js');
+const CharsetToEncoding = require('../constants/charset_encodings.js');
+
+class Query {
+  constructor(sql, charsetNumber) {
+    this.query = sql;
+    this.charsetNumber = charsetNumber;
+    this.encoding = CharsetToEncoding[charsetNumber];
+  }
+
+  toPacket() {
+    const buf = StringParser.encode(this.query, this.encoding);
+    const length = 5 + buf.length;
+    const buffer = Buffer.allocUnsafe(length);
+    const packet = new Packet(0, buffer, 0, length);
+    packet.offset = 4;
+    packet.writeInt8(CommandCode.QUERY);
+    packet.writeBuffer(buf);
+    return packet;
+  }
+}
+
+module.exports = Query;

login-auth_backend/node_modules/mysql2/lib/packets/register_slave.js

@@ -0,0 +1,46 @@
+'use strict';
+
+// http://dev.mysql.com/doc/internals/en/com-register-slave.html
+// note that documentation is incorrect, for example command code is actually 0x15 but documented as 0x14
+
+const Packet = require('../packets/packet');
+const CommandCodes = require('../constants/commands');
+
+class RegisterSlave {
+  constructor(opts) {
+    this.serverId = opts.serverId || 0;
+    this.slaveHostname = opts.slaveHostname || '';
+    this.slaveUser = opts.slaveUser || '';
+    this.slavePassword = opts.slavePassword || '';
+    this.slavePort = opts.slavePort || 0;
+    this.replicationRank = opts.replicationRank || 0;
+    this.masterId = opts.masterId || 0;
+  }
+
+  toPacket() {
+    const length =
+      15 + // TODO: should be ascii?
+      Buffer.byteLength(this.slaveHostname, 'utf8') +
+      Buffer.byteLength(this.slaveUser, 'utf8') +
+      Buffer.byteLength(this.slavePassword, 'utf8') +
+      3 +
+      4;
+    const buffer = Buffer.allocUnsafe(length);
+    const packet = new Packet(0, buffer, 0, length);
+    packet.offset = 4;
+    packet.writeInt8(CommandCodes.REGISTER_SLAVE);
+    packet.writeInt32(this.serverId);
+    packet.writeInt8(Buffer.byteLength(this.slaveHostname, 'utf8'));
+    packet.writeString(this.slaveHostname);
+    packet.writeInt8(Buffer.byteLength(this.slaveUser, 'utf8'));
+    packet.writeString(this.slaveUser);
+    packet.writeInt8(Buffer.byteLength(this.slavePassword, 'utf8'));
+    packet.writeString(this.slavePassword);
+    packet.writeInt16(this.slavePort);
+    packet.writeInt32(this.replicationRank);
+    packet.writeInt32(this.masterId);
+    return packet;
+  }
+}
+
+module.exports = RegisterSlave;

login-auth_backend/node_modules/mysql2/lib/packets/resultset_header.js

@@ -0,0 +1,124 @@
+'use strict';
+
+// TODO: rename to OK packet
+// https://dev.mysql.com/doc/internals/en/packet-OK_Packet.html
+
+const Packet = require('./packet.js');
+const ClientConstants = require('../constants/client.js');
+const ServerSatusFlags = require('../constants/server_status.js');
+
+const EncodingToCharset = require('../constants/encoding_charset.js');
+const sessionInfoTypes = require('../constants/session_track.js');
+
+class ResultSetHeader {
+  constructor(packet, connection) {
+    const bigNumberStrings = connection.config.bigNumberStrings;
+    const encoding = connection.serverEncoding;
+    const flags = connection._handshakePacket.capabilityFlags;
+    const isSet = function (flag) {
+      return flags & ClientConstants[flag];
+    };
+    if (packet.buffer[packet.offset] !== 0) {
+      this.fieldCount = packet.readLengthCodedNumber();
+      if (this.fieldCount === null) {
+        this.infileName = packet.readString(undefined, encoding);
+      }
+      return;
+    }
+    this.fieldCount = packet.readInt8(); // skip OK byte
+    this.affectedRows = packet.readLengthCodedNumber(bigNumberStrings);
+    this.insertId = packet.readLengthCodedNumberSigned(bigNumberStrings);
+    this.info = '';
+    if (isSet('PROTOCOL_41')) {
+      this.serverStatus = packet.readInt16();
+      this.warningStatus = packet.readInt16();
+    } else if (isSet('TRANSACTIONS')) {
+      this.serverStatus = packet.readInt16();
+    }
+    let stateChanges = null;
+    if (isSet('SESSION_TRACK') && packet.offset < packet.end) {
+      this.info = packet.readLengthCodedString(encoding);
+
+      if (this.serverStatus && ServerSatusFlags.SERVER_SESSION_STATE_CHANGED) {
+        // session change info record - see
+        // https://dev.mysql.com/doc/internals/en/packet-OK_Packet.html#cs-sect-packet-ok-sessioninfo
+        let len =
+          packet.offset < packet.end ? packet.readLengthCodedNumber() : 0;
+        const end = packet.offset + len;
+        let type, key, stateEnd;
+        if (len > 0) {
+          stateChanges = {
+            systemVariables: {},
+            schema: null,
+            gtids: [],
+            trackStateChange: null,
+          };
+        }
+        while (packet.offset < end) {
+          type = packet.readInt8();
+          len = packet.readLengthCodedNumber();
+          stateEnd = packet.offset + len;
+          if (type === sessionInfoTypes.SYSTEM_VARIABLES) {
+            key = packet.readLengthCodedString(encoding);
+            const val = packet.readLengthCodedString(encoding);
+            stateChanges.systemVariables[key] = val;
+            if (key === 'character_set_client') {
+              const charsetNumber = EncodingToCharset[val];
+              // TODO - better api for driver users to handle unknown encodings?
+              // maybe custom coverter in the config?
+              // For now just ignore character_set_client command if there is
+              // no known mapping from reported encoding to a charset code
+              if (typeof charsetNumber !== 'undefined') {
+                connection.config.charsetNumber = charsetNumber;
+              }
+            }
+          } else if (type === sessionInfoTypes.SCHEMA) {
+            key = packet.readLengthCodedString(encoding);
+            stateChanges.schema = key;
+          } else if (type === sessionInfoTypes.STATE_CHANGE) {
+            stateChanges.trackStateChange =
+              packet.readLengthCodedString(encoding);
+          } else if (type === sessionInfoTypes.STATE_GTIDS) {
+            // TODO: find if the first length coded string means anything. Usually comes as empty
+            // eslint-disable-next-line no-unused-vars
+            const _unknownString = packet.readLengthCodedString(encoding);
+            const gtid = packet.readLengthCodedString(encoding);
+            stateChanges.gtids = gtid.split(',');
+          } else {
+            // unsupported session track type. For now just ignore
+          }
+          packet.offset = stateEnd;
+        }
+      }
+    } else {
+      this.info = packet.readString(undefined, encoding);
+    }
+    if (stateChanges) {
+      this.stateChanges = stateChanges;
+    }
+    const m = this.info.match(/\schanged:\s*(\d+)/i);
+    if (m !== null) {
+      this.changedRows = parseInt(m[1], 10);
+    } else {
+      this.changedRows = 0;
+    }
+  }
+
+  // TODO: should be consistent instance member, but it's just easier here to have just function
+  static toPacket(fieldCount, insertId) {
+    let length = 4 + Packet.lengthCodedNumberLength(fieldCount);
+    if (typeof insertId !== 'undefined') {
+      length += Packet.lengthCodedNumberLength(insertId);
+    }
+    const buffer = Buffer.allocUnsafe(length);
+    const packet = new Packet(0, buffer, 0, length);
+    packet.offset = 4;
+    packet.writeLengthCodedNumber(fieldCount);
+    if (typeof insertId !== 'undefined') {
+      packet.writeLengthCodedNumber(insertId);
+    }
+    return packet;
+  }
+}
+
+module.exports = ResultSetHeader;

login-auth_backend/node_modules/mysql2/lib/packets/ssl_request.js

@@ -0,0 +1,25 @@
+'use strict';
+
+const ClientConstants = require('../constants/client');
+const Packet = require('../packets/packet');
+
+class SSLRequest {
+  constructor(flags, charset) {
+    this.clientFlags = flags | ClientConstants.SSL;
+    this.charset = charset;
+  }
+
+  toPacket() {
+    const length = 36;
+    const buffer = Buffer.allocUnsafe(length);
+    const packet = new Packet(0, buffer, 0, length);
+    buffer.fill(0);
+    packet.offset = 4;
+    packet.writeInt32(this.clientFlags);
+    packet.writeInt32(0); // max packet size. todo: move to config
+    packet.writeInt8(this.charset);
+    return packet;
+  }
+}
+
+module.exports = SSLRequest;

login-auth_backend/node_modules/mysql2/lib/packets/text_row.js

@@ -0,0 +1,47 @@
+'use strict';
+
+const Packet = require('../packets/packet');
+
+class TextRow {
+  constructor(columns) {
+    this.columns = columns || [];
+  }
+
+  static fromPacket(packet) {
+    // packet.reset(); // set offset to starting point?
+    const columns = [];
+    while (packet.haveMoreData()) {
+      columns.push(packet.readLengthCodedString());
+    }
+    return new TextRow(columns);
+  }
+
+  static toPacket(columns, encoding) {
+    const sequenceId = 0; // TODO remove, this is calculated now in connecton
+    let length = 0;
+    columns.forEach((val) => {
+      if (val === null || typeof val === 'undefined') {
+        ++length;
+        return;
+      }
+      length += Packet.lengthCodedStringLength(val.toString(10), encoding);
+    });
+    const buffer = Buffer.allocUnsafe(length + 4);
+    const packet = new Packet(sequenceId, buffer, 0, length + 4);
+    packet.offset = 4;
+    columns.forEach((val) => {
+      if (val === null) {
+        packet.writeNull();
+        return;
+      }
+      if (typeof val === 'undefined') {
+        packet.writeInt8(0);
+        return;
+      }
+      packet.writeLengthCodedString(val.toString(10), encoding);
+    });
+    return packet;
+  }
+}
+
+module.exports = TextRow;