dprintjs
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Generate unique device fingerprints using browser characteristics
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{"version":3,"file":"index.cjs","sources":["../src/fingerprint.service.ts"],"sourcesContent":["// src/fingerprint.service.ts\nexport interface FingerprintOptions {\n format?: 'short' | 'long';\n includeCanvas?: boolean;\n includeAudio?: boolean;\n includeWebGL?: boolean;\n salt?: string; // Optional salt for additional randomness\n}\n\nexport class dPrintId {\n private static _instance: dPrintId;\n\n private constructor() {}\n\n public static getInstance(): dPrintId {\n if (!dPrintId._instance) {\n dPrintId._instance = new dPrintId();\n }\n return dPrintId._instance;\n }\n\n public async generateFingerprint(options: FingerprintOptions = {}): Promise<string> {\n const components = await this.collectComponents(options);\n \n if (options.format === 'long') {\n return this.generateLongFingerprint(components, options.salt);\n }\n \n return this.generateShortFingerprint(components, options.salt);\n }\n\n private async collectComponents(options: FingerprintOptions): Promise<string[]> {\n const components: string[] = [];\n\n try {\n // Basic components (always included)\n components.push(navigator.userAgent);\n components.push(`${window.screen.height}x${window.screen.width}x${window.screen.colorDepth}`);\n components.push(Intl.DateTimeFormat().resolvedOptions().timeZone);\n components.push(navigator.language);\n components.push(navigator.hardwareConcurrency?.toString() || '');\n components.push((navigator as any).deviceMemory?.toString() || '');\n components.push(navigator.platform);\n\n // Optional components\n if (options.includeCanvas !== false) {\n const canvasData = await this.getCanvasFingerprint();\n components.push(canvasData);\n }\n\n if (options.includeAudio !== false) {\n const audioData = await this.getAudioFingerprint();\n components.push(audioData);\n }\n\n if (options.includeWebGL !== false) {\n const webglData = this.getWebGLFingerprint();\n components.push(webglData);\n }\n\n // Add some additional entropy\n components.push(new Date().getTimezoneOffset().toString());\n components.push(this.getPlugins());\n components.push(this.getTouchSupport());\n \n } catch (error) {\n console.warn('Error collecting fingerprint components:', error);\n }\n\n return components;\n }\n\n private async getCanvasFingerprint(): Promise<string> {\n try {\n const canvas = document.createElement('canvas');\n const ctx = canvas.getContext('2d');\n if (!ctx) return '';\n\n canvas.width = 200;\n canvas.height = 50;\n\n // Add a background\n ctx.fillStyle = '#f60';\n ctx.fillRect(0, 0, canvas.width, canvas.height);\n ctx.fillStyle = '#069';\n ctx.fillRect(2, 2, 50, 50);\n\n // Add text\n ctx.textBaseline = 'top';\n ctx.font = '14px Arial';\n ctx.fillStyle = '#069';\n ctx.fillText('👋 Hello, world!', 4, 15);\n\n // Add some shapes\n ctx.strokeStyle = '#069';\n ctx.beginPath();\n ctx.moveTo(100, 10);\n ctx.bezierCurveTo(120, 20, 140, 0, 160, 30);\n ctx.stroke();\n\n return canvas.toDataURL();\n } catch {\n return '';\n }\n }\n\n private async getAudioFingerprint(): Promise<string> {\n try {\n const audioContext = new (window.AudioContext || (window as any).webkitAudioContext)();\n const oscillator = audioContext.createOscillator();\n const analyser = audioContext.createAnalyser();\n const gainNode = audioContext.createGain();\n const scriptProcessor = audioContext.createScriptProcessor(4096, 1, 1);\n\n gainNode.gain.value = 0;\n oscillator.type = 'triangle';\n oscillator.connect(analyser);\n analyser.connect(scriptProcessor);\n scriptProcessor.connect(gainNode);\n gainNode.connect(audioContext.destination);\n\n oscillator.start(0);\n\n const audioTimeData = new Float32Array(analyser.frequencyBinCount);\n analyser.getFloatFrequencyData(audioTimeData);\n\n oscillator.stop();\n audioContext.close();\n\n return Array.from(audioTimeData)\n .slice(0, 5)\n .map(x => x.toString())\n .join(',');\n } catch {\n return '';\n }\n }\n\n private getWebGLFingerprint(): string {\n try {\n const canvas = document.createElement('canvas');\n const gl = canvas.getContext('webgl') || canvas.getContext('experimental-webgl');\n if (!gl) return '';\n\n const webgl = gl as WebGLRenderingContext;\n\n const data = [\n webgl.getParameter(webgl.VENDOR),\n webgl.getParameter(webgl.RENDERER),\n webgl.getParameter(webgl.VERSION),\n webgl.getParameter(webgl.SHADING_LANGUAGE_VERSION),\n this.getWebGLExtensions(webgl),\n ].join('~');\n\n return data;\n } catch {\n return '';\n }\n }\n\n private getWebGLExtensions(gl: WebGLRenderingContext): string {\n try {\n const extensions = gl.getSupportedExtensions();\n return extensions ? extensions.join(',') : '';\n } catch {\n return '';\n }\n }\n\n private getPlugins(): string {\n try {\n const plugins = Array.from(navigator.plugins || [])\n .map(p => [p.name, p.description, Array.from(p)])\n .flat()\n .join(',');\n return plugins;\n } catch {\n return '';\n }\n }\n\n private getTouchSupport(): string {\n try {\n const touchPoints = navigator.maxTouchPoints;\n const touchEvent = 'ontouchstart' in window;\n const touchList = 'TouchEvent' in window;\n \n return `${touchPoints},${touchEvent},${touchList}`;\n } catch {\n return '';\n }\n }\n\n private async generateLongFingerprint(components: string[], salt?: string): Promise<string> {\n try {\n const data = components.join('|||') + (salt || '');\n const msgBuffer = new TextEncoder().encode(data);\n const hashBuffer = await crypto.subtle.digest('SHA-256', msgBuffer);\n const hashArray = Array.from(new Uint8Array(hashBuffer));\n return hashArray.map(b => b.toString(16).padStart(2, '0')).join('');\n } catch {\n // Fallback to short fingerprint if crypto API is not available\n return this.generateShortFingerprint(components, salt);\n }\n }\n\n private generateShortFingerprint(components: string[], salt?: string): string {\n const data = components.join('|||') + (salt || '');\n let h1 = 0xdeadbeef;\n let h2 = 0x41c6ce57;\n\n for (let i = 0; i < data.length; i++) {\n const ch = data.charCodeAt(i);\n h1 = Math.imul(h1 ^ ch, 2654435761);\n h2 = Math.imul(h2 ^ ch, 1597334677);\n }\n\n h1 = Math.imul(h1 ^ (h1 >>> 16), 2246822507);\n h1 ^= Math.imul(h2 ^ (h2 >>> 13), 3266489909);\n h2 = Math.imul(h2 ^ (h2 >>> 16), 2246822507);\n h2 ^= Math.imul(h1 ^ (h1 >>> 13), 3266489909);\n\n // Generate 8-character string\n return (h2 >>> 0).toString(36).padStart(6, '0') + \n (h1 >>> 0).toString(36).padStart(6, '0').slice(0, 2);\n 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