tedious
Version:
A TDS driver, for connecting to MS SQLServer databases.
245 lines (244 loc) • 31 kB
JavaScript
"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = void 0;
var _errors = require("./errors");
var _formatHex = require("./format-hex");
var _writableTrackingBuffer = _interopRequireDefault(require("./tracking-buffer/writable-tracking-buffer"));
var _crypto = require("crypto");
function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
const traceIdSize = 36;
const TOKEN = {
VERSION: 0x00,
ENCRYPTION: 0x01,
INSTOPT: 0x02,
THREADID: 0x03,
MARS: 0x04,
TRACEID: 0x05,
FEDAUTHREQUIRED: 0x06,
TERMINATOR: 0xFF
};
const ENCRYPT = {
OFF: 0x00,
ON: 0x01,
NOT_SUP: 0x02,
REQ: 0x03
};
const encryptByValue = {};
for (const name in ENCRYPT) {
const value = ENCRYPT[name];
encryptByValue[value] = name;
}
const MARS = {
OFF: 0x00,
ON: 0x01
};
const marsByValue = {};
for (const name in MARS) {
const value = MARS[name];
marsByValue[value] = name;
}
/*
s2.2.6.5
*/
class PreloginPayload {
constructor(bufferOrOptions = {
encrypt: false,
version: {
major: 0,
minor: 0,
build: 0,
subbuild: 0
}
}) {
if (bufferOrOptions instanceof Buffer) {
this.data = bufferOrOptions;
this.options = {
encrypt: false,
version: {
major: 0,
minor: 0,
build: 0,
subbuild: 0
}
};
} else {
this.options = bufferOrOptions;
this.createOptions();
}
this.extractOptions();
}
createOptions() {
const options = [this.createVersionOption(), this.createEncryptionOption(), this.createInstanceOption(), this.createThreadIdOption(), this.createMarsOption(), this.createTraceIdOption(), this.createFedAuthOption()];
let length = 0;
for (let i = 0, len = options.length; i < len; i++) {
const option = options[i];
length += 5 + option.data.length;
}
length++; // terminator
this.data = Buffer.alloc(length, 0);
let optionOffset = 0;
let optionDataOffset = 5 * options.length + 1;
for (let j = 0, len = options.length; j < len; j++) {
const option = options[j];
this.data.writeUInt8(option.token, optionOffset + 0);
this.data.writeUInt16BE(optionDataOffset, optionOffset + 1);
this.data.writeUInt16BE(option.data.length, optionOffset + 3);
optionOffset += 5;
option.data.copy(this.data, optionDataOffset);
optionDataOffset += option.data.length;
}
this.data.writeUInt8(TOKEN.TERMINATOR, optionOffset);
}
createVersionOption() {
const buffer = new _writableTrackingBuffer.default();
buffer.writeUInt8(this.options.version.major);
buffer.writeUInt8(this.options.version.minor);
buffer.writeUInt16BE(this.options.version.build);
buffer.writeUInt16BE(this.options.version.subbuild);
return {
token: TOKEN.VERSION,
data: buffer.data
};
}
createEncryptionOption() {
const buffer = new _writableTrackingBuffer.default();
if (this.options.encrypt) {
buffer.writeUInt8(ENCRYPT.ON);
} else {
buffer.writeUInt8(ENCRYPT.NOT_SUP);
}
return {
token: TOKEN.ENCRYPTION,
data: buffer.data
};
}
createInstanceOption() {
const buffer = new _writableTrackingBuffer.default();
buffer.writeUInt8(0x00);
return {
token: TOKEN.INSTOPT,
data: buffer.data
};
}
createThreadIdOption() {
const buffer = new _writableTrackingBuffer.default();
buffer.writeUInt32BE(0x00);
return {
token: TOKEN.THREADID,
data: buffer.data
};
}
createMarsOption() {
const buffer = new _writableTrackingBuffer.default();
buffer.writeUInt8(MARS.OFF);
return {
token: TOKEN.MARS,
data: buffer.data
};
}
createTraceIdOption() {
const buffer = new _writableTrackingBuffer.default();
// Generate a random series of bytes to use as the TraceID.
// Used for debugging purposes.
buffer.writeBuffer((0, _crypto.randomBytes)(traceIdSize));
return {
token: TOKEN.TRACEID,
data: buffer.data
};
}
createFedAuthOption() {
const buffer = new _writableTrackingBuffer.default();
buffer.writeUInt8(0x01);
return {
token: TOKEN.FEDAUTHREQUIRED,
data: buffer.data
};
}
extractOptions() {
let offset = 0;
let encryptionOffset;
while (this.data[offset] !== TOKEN.TERMINATOR) {
let dataOffset = this.data.readUInt16BE(offset + 1);
const dataLength = this.data.readUInt16BE(offset + 3);
switch (this.data[offset]) {
case TOKEN.VERSION:
this.extractVersion(dataOffset);
break;
case TOKEN.ENCRYPTION:
if (encryptionOffset !== undefined) {
throw new _errors.ConnectionError('Duplicate ENCRYPTION option in PRELOGIN response', 'EENCRYPT');
}
if (dataLength !== 1 || dataOffset >= this.data.length) {
throw new _errors.ConnectionError('Malformed ENCRYPTION option in PRELOGIN response', 'EENCRYPT');
}
encryptionOffset = dataOffset;
this.extractEncryption(dataOffset);
break;
case TOKEN.INSTOPT:
this.extractInstance(dataOffset);
break;
case TOKEN.THREADID:
if (dataLength > 0) {
this.extractThreadId(dataOffset);
}
break;
case TOKEN.MARS:
this.extractMars(dataOffset);
break;
case TOKEN.TRACEID:
this.extractTraceId(dataOffset);
break;
case TOKEN.FEDAUTHREQUIRED:
this.extractFedAuth(dataOffset);
break;
}
offset += 5;
dataOffset += dataLength;
}
if (encryptionOffset !== undefined && encryptionOffset <= offset) {
throw new _errors.ConnectionError('Malformed ENCRYPTION option in PRELOGIN response', 'EENCRYPT');
}
}
extractVersion(offset) {
this.version = {
major: this.data.readUInt8(offset + 0),
minor: this.data.readUInt8(offset + 1),
build: this.data.readUInt16BE(offset + 2),
subbuild: this.data.readUInt16BE(offset + 4)
};
}
extractEncryption(offset) {
this.encryption = this.data.readUInt8(offset);
this.encryptionString = encryptByValue[this.encryption];
}
extractInstance(offset) {
this.instance = this.data.readUInt8(offset);
}
extractThreadId(offset) {
this.threadId = this.data.readUInt32BE(offset);
}
extractMars(offset) {
this.mars = this.data.readUInt8(offset);
this.marsString = marsByValue[this.mars];
}
extractTraceId(offset) {
this.traceId = this.data.subarray(offset, offset + traceIdSize);
}
extractFedAuth(offset) {
this.fedAuthRequired = this.data.readUInt8(offset);
}
toString(indent = '') {
const {
major,
minor,
build,
subbuild
} = this.version;
return indent + 'PreLogin - ' + `version:${major}.${minor}.${build}.${subbuild}, ` + `encryption:0x${(0, _formatHex.formatHex)(this.encryption ? this.encryption : 0, 2)}(${this.encryptionString ? this.encryptionString : ''}), ` + `instopt:0x${(0, _formatHex.formatHex)(this.instance ? this.instance : 0, 2)}, ` + `threadId:0x${(0, _formatHex.formatHex)(this.threadId ? this.threadId : 0, 8)}, ` + `mars:0x${(0, _formatHex.formatHex)(this.mars ? this.mars : 0, 2)}(${this.marsString ? this.marsString : ''}), ` + `traceId:${this.traceId ? this.traceId.toString('hex') : ''}`;
}
}
var _default = exports.default = PreloginPayload;
module.exports = PreloginPayload;
//# sourceMappingURL=data:application/json;charset=utf-8;base64,{"version":3,"names":["_errors","require","_formatHex","_writableTrackingBuffer","_interopRequireDefault","_crypto","e","__esModule","default","traceIdSize","TOKEN","VERSION","ENCRYPTION","INSTOPT","THREADID","MARS","TRACEID","FEDAUTHREQUIRED","TERMINATOR","ENCRYPT","OFF","ON","NOT_SUP","REQ","encryptByValue","name","value","marsByValue","PreloginPayload","constructor","bufferOrOptions","encrypt","version","major","minor","build","subbuild","Buffer","data","options","createOptions","extractOptions","createVersionOption","createEncryptionOption","createInstanceOption","createThreadIdOption","createMarsOption","createTraceIdOption","createFedAuthOption","length","i","len","option","alloc","optionOffset","optionDataOffset","j","writeUInt8","token","writeUInt16BE","copy","buffer","WritableTrackingBuffer","writeUInt32BE","writeBuffer","randomBytes","offset","encryptionOffset","dataOffset","readUInt16BE","dataLength","extractVersion","undefined","ConnectionError","extractEncryption","extractInstance","extractThreadId","extractMars","extractTraceId","extractFedAuth","readUInt8","encryption","encryptionString","instance","threadId","readUInt32BE","mars","marsString","traceId","subarray","fedAuthRequired","toString","indent","formatHex","_default","exports","module"],"sources":["../src/prelogin-payload.ts"],"sourcesContent":["import { ConnectionError } from './errors';\nimport { formatHex } from './format-hex';\n\nimport WritableTrackingBuffer from './tracking-buffer/writable-tracking-buffer';\nimport { randomBytes } from 'crypto';\n\nconst traceIdSize = 36;\n\nconst TOKEN = {\n  VERSION: 0x00,\n  ENCRYPTION: 0x01,\n  INSTOPT: 0x02,\n  THREADID: 0x03,\n  MARS: 0x04,\n  TRACEID: 0x05,\n  FEDAUTHREQUIRED: 0x06,\n  TERMINATOR: 0xFF\n};\n\nconst ENCRYPT: { [key: string]: number } = {\n  OFF: 0x00,\n  ON: 0x01,\n  NOT_SUP: 0x02,\n  REQ: 0x03\n};\n\nconst encryptByValue: { [key: number]: string } = {};\n\nfor (const name in ENCRYPT) {\n  const value = ENCRYPT[name];\n  encryptByValue[value] = name;\n}\n\nconst MARS: { [key: string]: number } = {\n  OFF: 0x00,\n  ON: 0x01\n};\n\nconst marsByValue: { [key: number]: string } = {};\n\nfor (const name in MARS) {\n  const value = MARS[name];\n  marsByValue[value] = name;\n}\n\ninterface Options {\n  encrypt: boolean;\n  version: {\n    major: number;\n    minor: number;\n    build: number;\n    subbuild: number;\n  };\n}\n\n/*\n  s2.2.6.5\n */\nclass PreloginPayload {\n  declare data: Buffer;\n  declare options: Options;\n\n  declare version: {\n    major: number;\n    minor: number;\n    build: number;\n    subbuild: number;\n  };\n\n  declare encryption: number | undefined;\n  declare encryptionString: string | undefined;\n\n  declare instance: number;\n\n  declare threadId: number;\n\n  declare mars: number;\n  declare marsString: string;\n  declare traceId: Buffer;\n  declare fedAuthRequired: number;\n\n  constructor(bufferOrOptions: Buffer | Options = { encrypt: false, version: { major: 0, minor: 0, build: 0, subbuild: 0 } }) {\n    if (bufferOrOptions instanceof Buffer) {\n      this.data = bufferOrOptions;\n      this.options = { encrypt: false, version: { major: 0, minor: 0, build: 0, subbuild: 0 } };\n    } else {\n      this.options = bufferOrOptions as Options;\n      this.createOptions();\n    }\n    this.extractOptions();\n  }\n\n  createOptions() {\n    const options = [\n      this.createVersionOption(),\n      this.createEncryptionOption(),\n      this.createInstanceOption(),\n      this.createThreadIdOption(),\n      this.createMarsOption(),\n      this.createTraceIdOption(),\n      this.createFedAuthOption()\n    ];\n\n    let length = 0;\n    for (let i = 0, len = options.length; i < len; i++) {\n      const option = options[i];\n      length += 5 + option.data.length;\n    }\n    length++; // terminator\n    this.data = Buffer.alloc(length, 0);\n    let optionOffset = 0;\n    let optionDataOffset = 5 * options.length + 1;\n\n    for (let j = 0, len = options.length; j < len; j++) {\n      const option = options[j];\n      this.data.writeUInt8(option.token, optionOffset + 0);\n      this.data.writeUInt16BE(optionDataOffset, optionOffset + 1);\n      this.data.writeUInt16BE(option.data.length, optionOffset + 3);\n      optionOffset += 5;\n      option.data.copy(this.data, optionDataOffset);\n      optionDataOffset += option.data.length;\n    }\n\n    this.data.writeUInt8(TOKEN.TERMINATOR, optionOffset);\n  }\n\n  createVersionOption() {\n    const buffer = new WritableTrackingBuffer();\n    buffer.writeUInt8(this.options.version.major);\n    buffer.writeUInt8(this.options.version.minor);\n    buffer.writeUInt16BE(this.options.version.build);\n    buffer.writeUInt16BE(this.options.version.subbuild);\n    return {\n      token: TOKEN.VERSION,\n      data: buffer.data\n    };\n  }\n\n  createEncryptionOption() {\n    const buffer = new WritableTrackingBuffer();\n    if (this.options.encrypt) {\n      buffer.writeUInt8(ENCRYPT.ON);\n    } else {\n      buffer.writeUInt8(ENCRYPT.NOT_SUP);\n    }\n    return {\n      token: TOKEN.ENCRYPTION,\n      data: buffer.data\n    };\n  }\n\n  createInstanceOption() {\n    const buffer = new WritableTrackingBuffer();\n    buffer.writeUInt8(0x00);\n    return {\n      token: TOKEN.INSTOPT,\n      data: buffer.data\n    };\n  }\n\n  createThreadIdOption() {\n    const buffer = new WritableTrackingBuffer();\n    buffer.writeUInt32BE(0x00);\n    return {\n      token: TOKEN.THREADID,\n      data: buffer.data\n    };\n  }\n\n  createMarsOption() {\n    const buffer = new WritableTrackingBuffer();\n    buffer.writeUInt8(MARS.OFF);\n    return {\n      token: TOKEN.MARS,\n      data: buffer.data\n    };\n  }\n\n  createTraceIdOption() {\n    const buffer = new WritableTrackingBuffer();\n    // Generate a random series of bytes to use as the TraceID.\n    // Used for debugging purposes.\n    buffer.writeBuffer(randomBytes(traceIdSize));\n    return {\n      token: TOKEN.TRACEID,\n      data: buffer.data\n    };\n  }\n\n  createFedAuthOption() {\n    const buffer = new WritableTrackingBuffer();\n    buffer.writeUInt8(0x01);\n    return {\n      token: TOKEN.FEDAUTHREQUIRED,\n      data: buffer.data\n    };\n  }\n\n  extractOptions() {\n    let offset = 0;\n    let encryptionOffset: number | undefined;\n    while (this.data[offset] !== TOKEN.TERMINATOR) {\n      let dataOffset = this.data.readUInt16BE(offset + 1);\n      const dataLength = this.data.readUInt16BE(offset + 3);\n      switch (this.data[offset]) {\n        case TOKEN.VERSION:\n          this.extractVersion(dataOffset);\n          break;\n        case TOKEN.ENCRYPTION:\n          if (encryptionOffset !== undefined) {\n            throw new ConnectionError('Duplicate ENCRYPTION option in PRELOGIN response', 'EENCRYPT');\n          }\n          if (dataLength !== 1 || dataOffset >= this.data.length) {\n            throw new ConnectionError('Malformed ENCRYPTION option in PRELOGIN response', 'EENCRYPT');\n          }\n          encryptionOffset = dataOffset;\n          this.extractEncryption(dataOffset);\n          break;\n        case TOKEN.INSTOPT:\n          this.extractInstance(dataOffset);\n          break;\n        case TOKEN.THREADID:\n          if (dataLength > 0) {\n            this.extractThreadId(dataOffset);\n          }\n          break;\n        case TOKEN.MARS:\n          this.extractMars(dataOffset);\n          break;\n        case TOKEN.TRACEID:\n          this.extractTraceId(dataOffset);\n          break;\n        case TOKEN.FEDAUTHREQUIRED:\n          this.extractFedAuth(dataOffset);\n          break;\n      }\n      offset += 5;\n      dataOffset += dataLength;\n    }\n    if (encryptionOffset !== undefined && encryptionOffset <= offset) {\n      throw new ConnectionError('Malformed ENCRYPTION option in PRELOGIN response', 'EENCRYPT');\n    }\n  }\n\n  extractVersion(offset: number) {\n    this.version = {\n      major: this.data.readUInt8(offset + 0),\n      minor: this.data.readUInt8(offset + 1),\n      build: this.data.readUInt16BE(offset + 2),\n      subbuild: this.data.readUInt16BE(offset + 4)\n    };\n  }\n\n  extractEncryption(offset: number) {\n    this.encryption = this.data.readUInt8(offset);\n    this.encryptionString = encryptByValue[this.encryption];\n  }\n\n  extractInstance(offset: number) {\n    this.instance = this.data.readUInt8(offset);\n  }\n\n  extractThreadId(offset: number) {\n    this.threadId = this.data.readUInt32BE(offset);\n  }\n\n  extractMars(offset: number) {\n    this.mars = this.data.readUInt8(offset);\n    this.marsString = marsByValue[this.mars];\n  }\n\n  extractTraceId(offset: number) {\n    this.traceId = this.data.subarray(offset, offset + traceIdSize);\n  }\n\n  extractFedAuth(offset: number) {\n    this.fedAuthRequired = this.data.readUInt8(offset);\n  }\n\n  toString(indent = '') {\n    const { major, minor, build, subbuild } = this.version;\n    return indent + 'PreLogin - ' +\n      `version:${major}.${minor}.${build}.${subbuild}, ` +\n      `encryption:0x${formatHex(this.encryption ? this.encryption : 0, 2)}(${this.encryptionString ? this.encryptionString : ''}), ` +\n      `instopt:0x${formatHex(this.instance ? this.instance : 0, 2)}, ` +\n      `threadId:0x${formatHex(this.threadId ? this.threadId : 0, 8)}, ` +\n      `mars:0x${formatHex(this.mars ? this.mars : 0, 2)}(${this.marsString ? this.marsString : ''}), ` +\n      `traceId:${this.traceId ? this.traceId.toString('hex') : ''}`;\n  }\n}\n\nexport default PreloginPayload;\nmodule.exports = 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