UNPKG

tedious

Version:

A TDS driver, for connecting to MS SQLServer databases.

227 lines (226 loc) • 28.5 kB
"use strict"; Object.defineProperty(exports, "__esModule", { value: true }); exports.default = void 0; var _sprintfJs = require("sprintf-js"); 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; } /* s2.2.6.4 */ 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; 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: 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; } } 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 = '') { return indent + 'PreLogin - ' + (0, _sprintfJs.sprintf)('version:%d.%d.%d.%d, encryption:0x%02X(%s), instopt:0x%02X, threadId:0x%08X, mars:0x%02X(%s), traceId:%s', this.version.major, this.version.minor, this.version.build, this.version.subbuild, this.encryption ? this.encryption : 0, this.encryptionString ? this.encryptionString : '', this.instance ? this.instance : 0, this.threadId ? this.threadId : 0, this.mars ? this.mars : 0, this.marsString ? this.marsString : '', this.traceId ? this.traceId.toString('hex') : ''); } } var _default = exports.default = PreloginPayload; module.exports = PreloginPayload; //# 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{ sprintf } from 'sprintf-js';\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  s2.2.6.4\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;\n  declare encryptionString: string;\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    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          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  }\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    return indent + 'PreLogin - ' + sprintf(\n      'version:%d.%d.%d.%d, encryption:0x%02X(%s), instopt:0x%02X, threadId:0x%08X, mars:0x%02X(%s), traceId:%s',\n      this.version.major, this.version.minor, this.version.build, this.version.subbuild,\n      this.encryption ? this.encryption : 0,\n      this.encryptionString ? this.encryptionString : '',\n      this.instance ? this.instance : 0,\n      this.threadId ? this.threadId : 0,\n      this.mars ? this.mars : 0,\n      this.marsString ? this.marsString : '',\n      this.traceId ? this.traceId.toString('hex') : '',\n    );\n  }\n}\n\nexport default PreloginPayload;\nmodule.exports = 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