| @@ -1,746 +1,22 @@ | ||
| 1 | -/** | |
| 2 | - * Secure CryptX Library - Fixed for backward compatibility | |
| 3 | - * | |
| 4 | - * Everything below lives inside an IIFE. Without it, the top-level `const` and | |
| 5 | - * `class` declarations -- CONFIG, ITERATIONS, KEY_LENGTH, SecureUtils, | |
| 6 | - * SecureEncryption -- sit in the global lexical environment of the page, and a | |
| 7 | - * second script declaring any of those names does not merely overwrite them: | |
| 8 | - * it throws "Identifier has already been declared" and one of the two scripts | |
| 9 | - * stops dead. With names this general that is a matter of time, and the failure | |
| 10 | - * would look like CryptX being broken for no reason. | |
| 11 | - * | |
| 12 | - * What the outside is meant to reach is assigned to `window` at the bottom, | |
| 13 | - * deliberately and by name. | |
| 14 | - */ | |
| 15 | -(function () { | |
| 16 | - | |
| 17 | -// Configuration constants | |
| 18 | -// The ceiling PHP already enforces (SecureEncryption::MAX_ITERATIONS), repeated | |
| 19 | -// here so that no path can hand an absurd number to PBKDF2 and leave a | |
| 20 | -// visitor's browser tab grinding. | |
| 21 | -const MAX_ROUNDS = 1000000; | |
| 22 | - | |
| 23 | -// parseInt, because wp_localize_script turns every value into a string on the | |
| 24 | -// way into the page -- so cryptxConfig.iterations arrives as "10000", and a | |
| 25 | -// string fails Number.isInteger. Without this the clamp below applied only to | |
| 26 | -// the value read from a link and never to this one, which is the opposite of | |
| 27 | -// what one would assume from reading it. | |
| 28 | -const ITERATIONS = Math.min( | |
| 29 | - parseInt(window.cryptxConfig?.iterations, 10) || 100000, // fallback to old value | |
| 30 | - MAX_ROUNDS | |
| 31 | -); | |
| 32 | -const KEY_LENGTH = window.cryptxConfig?.keyLength || 32; | |
| 33 | -const IV_LENGTH = window.cryptxConfig?.ivLength || 16; | |
| 34 | -const SALT_LENGTH = window.cryptxConfig?.saltLength || 16; | |
| 35 | -const CONFIG = { | |
| 36 | - ALLOWED_PROTOCOLS: ['http:', 'https:', 'mailto:'], | |
| 37 | - MAX_URL_LENGTH: 2048, | |
| 38 | - ENCRYPTION_KEY_SIZE: 32, | |
| 39 | - IV_SIZE: 16 | |
| 40 | -}; | |
| 41 | - | |
| 42 | -/** | |
| 43 | - * Utility functions for secure operations | |
| 44 | - */ | |
| 45 | -class SecureUtils { | |
| 46 | - static getSecureRandomBytes(length) { | |
| 47 | - if (typeof crypto === 'undefined' || !crypto.getRandomValues) { | |
| 48 | - throw new Error('Secure random number generation not available'); | |
| 49 | - } | |
| 50 | - return crypto.getRandomValues(new Uint8Array(length)); | |
| 1 | +function DeCryptString( s ) | |
| 2 | +{ | |
| 3 | + var n = 0; | |
| 4 | + var r = "mailto:"; | |
| 5 | + var z = 0; | |
| 6 | + for( var i = 0; i < s.length/2; i++) | |
| 7 | + { | |
| 8 | + z = s.substr(i*2, 1); | |
| 9 | + n = s.charCodeAt( i*2+1 ); | |
| 10 | + if( n >= 8364 ) | |
| 11 | + { | |
| 12 | + n = 128; | |
| 13 | + } | |
| 14 | + r += String.fromCharCode( n - z ); | |
| 51 | 15 | } |
| 52 | - | |
| 53 | - static arrayBufferToBase64(buffer) { | |
| 54 | - const bytes = new Uint8Array(buffer); | |
| 55 | - let binary = ''; | |
| 56 | - for (let i = 0; i < bytes.byteLength; i++) { | |
| 57 | - binary += String.fromCharCode(bytes[i]); | |
| 58 | - } | |
| 59 | - return btoa(binary); | |
| 60 | - } | |
| 61 | - | |
| 62 | - static base64ToArrayBuffer(base64) { | |
| 63 | - const binary = atob(base64); | |
| 64 | - const buffer = new ArrayBuffer(binary.length); | |
| 65 | - const bytes = new Uint8Array(buffer); | |
| 66 | - for (let i = 0; i < binary.length; i++) { | |
| 67 | - bytes[i] = binary.charCodeAt(i); | |
| 68 | - } | |
| 69 | - return buffer; | |
| 70 | - } | |
| 71 | - | |
| 72 | - static validateUrl(url) { | |
| 73 | - if (typeof url !== 'string' || url.length === 0) { | |
| 74 | - return null; | |
| 75 | - } | |
| 76 | - | |
| 77 | - if (url.length > CONFIG.MAX_URL_LENGTH) { | |
| 78 | - console.error('URL exceeds maximum length'); | |
| 79 | - return null; | |
| 80 | - } | |
| 81 | - | |
| 82 | - try { | |
| 83 | - const urlObj = new URL(url); | |
| 84 | - | |
| 85 | - if (!CONFIG.ALLOWED_PROTOCOLS.includes(urlObj.protocol)) { | |
| 86 | - console.error('Protocol not allowed:', urlObj.protocol); | |
| 87 | - return null; | |
| 88 | - } | |
| 89 | - | |
| 90 | - if (urlObj.protocol === 'mailto:') { | |
| 91 | - const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/; | |
| 92 | - if (!emailRegex.test(urlObj.pathname)) { | |
| 93 | - console.error('Invalid email format in mailto URL'); | |
| 94 | - return null; | |
| 95 | - } | |
| 96 | - } | |
| 97 | - | |
| 98 | - return url; | |
| 99 | - } catch (error) { | |
| 100 | - console.error('Invalid URL format:', error.message); | |
| 101 | - return null; | |
| 102 | - } | |
| 103 | - } | |
| 104 | - | |
| 105 | - static escapeJavaScript(str) { | |
| 106 | - if (typeof str !== 'string') { | |
| 107 | - return ''; | |
| 108 | - } | |
| 109 | - return str.replace(/\\/g, '\\\\') | |
| 110 | - .replace(/'/g, "\\'") | |
| 111 | - .replace(/"/g, '\\"') | |
| 112 | - .replace(/\n/g, '\\n') | |
| 113 | - .replace(/\r/g, '\\r') | |
| 114 | - .replace(/\t/g, '\\t'); | |
| 115 | - } | |
| 16 | + return r; | |
| 116 | 17 | } |
| 117 | 18 | |
| 118 | -/** | |
| 119 | - * Legacy encryption class - Fixed to match original PHP algorithm | |
| 120 | - */ | |
| 121 | -class LegacyEncryption { | |
| 122 | - /** | |
| 123 | - * Decrypts using the original CryptX algorithm (matches PHP version) | |
| 124 | - * @param {string} encryptedString | |
| 125 | - * @returns {string} | |
| 126 | - */ | |
| 127 | - static originalDecrypt(encryptedString) { | |
| 128 | - if (typeof encryptedString !== 'string' || encryptedString.length === 0) { | |
| 129 | - throw new Error('Invalid encrypted string'); | |
| 130 | - } | |
| 131 | - | |
| 132 | - // Constants from original algorithm | |
| 133 | - const UPPER_LIMIT = 8364; | |
| 134 | - const DEFAULT_VALUE = 128; | |
| 135 | - | |
| 136 | - let charCode = 0; | |
| 137 | - let decryptedString = "mailto:"; | |
| 138 | - let encryptionKey = 0; | |
| 139 | - | |
| 140 | - try { | |
| 141 | - for (let i = 0; i < encryptedString.length; i += 2) { | |
| 142 | - if (i + 1 >= encryptedString.length) { | |
| 143 | - break; | |
| 144 | - } | |
| 145 | - | |
| 146 | - // Get the salt (encryption key) from current position | |
| 147 | - encryptionKey = parseInt(encryptedString.charAt(i), 10); | |
| 148 | - | |
| 149 | - // Handle invalid salt values | |
| 150 | - if (isNaN(encryptionKey)) { | |
| 151 | - encryptionKey = 0; | |
| 152 | - } | |
| 153 | - | |
| 154 | - // Get the character code from next position | |
| 155 | - charCode = encryptedString.charCodeAt(i + 1); | |
| 156 | - | |
| 157 | - // Apply the same logic as original | |
| 158 | - if (charCode >= UPPER_LIMIT) { | |
| 159 | - charCode = DEFAULT_VALUE; | |
| 160 | - } | |
| 161 | - | |
| 162 | - // Decrypt by subtracting the salt | |
| 163 | - const decryptedCharCode = charCode - encryptionKey; | |
| 164 | - | |
| 165 | - // Validate the result | |
| 166 | - if (decryptedCharCode < 0 || decryptedCharCode > 1114111) { | |
| 167 | - throw new Error('Invalid character code during decryption'); | |
| 168 | - } | |
| 169 | - | |
| 170 | - decryptedString += String.fromCharCode(decryptedCharCode); | |
| 171 | - } | |
| 172 | - | |
| 173 | - return decryptedString; | |
| 174 | - } catch (error) { | |
| 175 | - throw new Error('Original decryption failed: ' + error.message); | |
| 176 | - } | |
| 177 | - } | |
| 178 | - | |
| 179 | - /** | |
| 180 | - * Encrypts using the original CryptX algorithm (matches PHP version) | |
| 181 | - * @param {string} inputString | |
| 182 | - * @returns {string} | |
| 183 | - */ | |
| 184 | - static originalEncrypt(inputString) { | |
| 185 | - if (typeof inputString !== 'string' || inputString.length === 0) { | |
| 186 | - throw new Error('Invalid input string'); | |
| 187 | - } | |
| 188 | - | |
| 189 | - // Remove "mailto:" prefix if present for encryption | |
| 190 | - const cleanInput = inputString.replace(/^mailto:/, ''); | |
| 191 | - let crypt = ''; | |
| 192 | - | |
| 193 | - // ASCII values blacklist (from PHP constant) | |
| 194 | - const ASCII_VALUES_BLACKLIST = ['32', '34', '39', '60', '62', '63', '92', '94', '96', '127']; | |
| 195 | - | |
| 196 | - try { | |
| 197 | - for (let i = 0; i < cleanInput.length; i++) { | |
| 198 | - let salt, asciiValue; | |
| 199 | - let attempts = 0; | |
| 200 | - const maxAttempts = 20; // Prevent infinite loops | |
| 201 | - | |
| 202 | - do { | |
| 203 | - if (attempts >= maxAttempts) { | |
| 204 | - // Fallback to a safe salt if we can't find a valid one | |
| 205 | - salt = 1; | |
| 206 | - asciiValue = cleanInput.charCodeAt(i) + salt; | |
| 207 | - break; | |
| 208 | - } | |
| 209 | - | |
| 210 | - // Generate random number between 0 and 3 (matching PHP rand(0,3)) | |
| 211 | - const randomValues = SecureUtils.getSecureRandomBytes(1); | |
| 212 | - salt = randomValues[0] % 4; | |
| 213 | - | |
| 214 | - // Get ASCII value and add salt | |
| 215 | - asciiValue = cleanInput.charCodeAt(i) + salt; | |
| 216 | - | |
| 217 | - // Check if value exceeds limit (matching PHP logic) | |
| 218 | - if (asciiValue >= 8364) { | |
| 219 | - asciiValue = 128; | |
| 220 | - } | |
| 221 | - | |
| 222 | - attempts++; | |
| 223 | - } while (ASCII_VALUES_BLACKLIST.includes(asciiValue.toString()) && attempts < maxAttempts); | |
| 224 | - | |
| 225 | - // Append salt and character to result | |
| 226 | - crypt += salt.toString() + String.fromCharCode(asciiValue); | |
| 227 | - } | |
| 228 | - | |
| 229 | - return crypt; | |
| 230 | - } catch (error) { | |
| 231 | - throw new Error('Original encryption failed: ' + error.message); | |
| 232 | - } | |
| 233 | - } | |
| 234 | -} | |
| 235 | - | |
| 236 | -/** | |
| 237 | - * Modern encryption class using Web Crypto API - PHP Compatible | |
| 238 | - */ | |
| 239 | -class SecureEncryption { | |
| 240 | - /** | |
| 241 | - * @param {string} password | |
| 242 | - * @param {Uint8Array} salt | |
| 243 | - * @param {number} [iterations] What the link itself says it was made with. | |
| 244 | - * Left out only by links written before 4.2.0, which then fall back to | |
| 245 | - * the configured value -- the behaviour that made changing the setting | |
| 246 | - * kill every link already delivered. | |
| 247 | - */ | |
| 248 | - static async deriveKey(password, salt, iterations) { | |
| 249 | - // Clamped to the same ceiling PHP enforces. The value can only come | |
| 250 | - // from the server today -- KSES lets neither class nor data-* through | |
| 251 | - // for anyone without unfiltered_html, and anyone with it does not need | |
| 252 | - // this route -- but a number that reaches PBKDF2 unchecked is worth one | |
| 253 | - // line of arithmetic. | |
| 254 | - const rounds = Number.isInteger(iterations) && iterations > 0 | |
| 255 | - ? Math.min(iterations, MAX_ROUNDS) | |
| 256 | - : ITERATIONS; | |
| 257 | - const encoder = new TextEncoder(); | |
| 258 | - const keyMaterial = await crypto.subtle.importKey( | |
| 259 | - 'raw', | |
| 260 | - encoder.encode(password), | |
| 261 | - { name: 'PBKDF2' }, | |
| 262 | - false, | |
| 263 | - ['deriveKey'] | |
| 264 | - ); | |
| 265 | - | |
| 266 | - return crypto.subtle.deriveKey( | |
| 267 | - { | |
| 268 | - name: 'PBKDF2', | |
| 269 | - salt: salt, | |
| 270 | - iterations: rounds, | |
| 271 | - hash: 'SHA-256' | |
| 272 | - }, | |
| 273 | - keyMaterial, | |
| 274 | - { name: 'AES-GCM', length: KEY_LENGTH * 8}, | |
| 275 | - false, | |
| 276 | - ['encrypt', 'decrypt'] | |
| 277 | - ); | |
| 278 | - } | |
| 279 | - | |
| 280 | - static async encrypt(plaintext, password) { | |
| 281 | - if (typeof plaintext !== 'string' || typeof password !== 'string') { | |
| 282 | - throw new Error('Both plaintext and password must be strings'); | |
| 283 | - } | |
| 284 | - | |
| 285 | - const encoder = new TextEncoder(); | |
| 286 | - const salt = SecureUtils.getSecureRandomBytes(16); | |
| 287 | - const iv = SecureUtils.getSecureRandomBytes(CONFIG.IV_SIZE); | |
| 288 | - | |
| 289 | - const key = await this.deriveKey(password, salt); | |
| 290 | - | |
| 291 | - const encrypted = await crypto.subtle.encrypt( | |
| 292 | - { name: 'AES-GCM', iv: iv }, | |
| 293 | - key, | |
| 294 | - encoder.encode(plaintext) | |
| 295 | - ); | |
| 296 | - | |
| 297 | - // Match PHP format: salt(16) + iv(16) + encrypted_data + tag(16) | |
| 298 | - const encryptedArray = new Uint8Array(encrypted); | |
| 299 | - const encryptedData = encryptedArray.slice(0, -16); // Remove tag from encrypted data | |
| 300 | - const tag = encryptedArray.slice(-16); // Get the tag | |
| 301 | - | |
| 302 | - const combined = new Uint8Array(salt.length + iv.length + encryptedData.length + tag.length); | |
| 303 | - combined.set(salt, 0); | |
| 304 | - combined.set(iv, salt.length); | |
| 305 | - combined.set(encryptedData, salt.length + iv.length); | |
| 306 | - combined.set(tag, salt.length + iv.length + encryptedData.length); | |
| 307 | - | |
| 308 | - return SecureUtils.arrayBufferToBase64(combined.buffer); | |
| 309 | - } | |
| 310 | - | |
| 311 | - /** | |
| 312 | - * @param {string} encryptedData | |
| 313 | - * @param {string} password | |
| 314 | - * @param {number} [iterations] See deriveKey(). | |
| 315 | - */ | |
| 316 | - static async decrypt(encryptedData, password, iterations) { | |
| 317 | - if (typeof encryptedData !== 'string' || typeof password !== 'string') { | |
| 318 | - throw new Error('Both encryptedData and password must be strings'); | |
| 319 | - } | |
| 320 | - | |
| 321 | - try { | |
| 322 | - const combined = SecureUtils.base64ToArrayBuffer(encryptedData); | |
| 323 | - const totalLength = combined.byteLength; | |
| 324 | - | |
| 325 | - // PHP format: salt(16) + iv(16) + encrypted_data + tag(16) | |
| 326 | - const saltLength = 16; | |
| 327 | - const ivLength = 16; | |
| 328 | - const tagLength = 16; | |
| 329 | - const encryptedDataLength = totalLength - saltLength - ivLength - tagLength; | |
| 330 | - | |
| 331 | - if (totalLength < saltLength + ivLength + tagLength) { | |
| 332 | - throw new Error('Encrypted data too short'); | |
| 333 | - } | |
| 334 | - | |
| 335 | - const salt = combined.slice(0, saltLength); | |
| 336 | - const iv = combined.slice(saltLength, saltLength + ivLength); | |
| 337 | - const encryptedDataOnly = combined.slice(saltLength + ivLength, saltLength + ivLength + encryptedDataLength); | |
| 338 | - const tag = combined.slice(-tagLength); // Last 16 bytes | |
| 339 | - | |
| 340 | - const key = await this.deriveKey(password, new Uint8Array(salt), iterations); | |
| 341 | - | |
| 342 | - // Reconstruct the encrypted data with tag for Web Crypto API | |
| 343 | - const encryptedWithTag = new Uint8Array(encryptedDataOnly.byteLength + tag.byteLength); | |
| 344 | - encryptedWithTag.set(new Uint8Array(encryptedDataOnly), 0); | |
| 345 | - encryptedWithTag.set(new Uint8Array(tag), encryptedDataOnly.byteLength); | |
| 346 | - | |
| 347 | - const decrypted = await crypto.subtle.decrypt( | |
| 348 | - { name: 'AES-GCM', iv: new Uint8Array(iv) }, | |
| 349 | - key, | |
| 350 | - encryptedWithTag | |
| 351 | - ); | |
| 352 | - | |
| 353 | - const decoder = new TextDecoder(); | |
| 354 | - return decoder.decode(decrypted); | |
| 355 | - } catch (error) { | |
| 356 | - throw new Error('Decryption failed: ' + error.message); | |
| 357 | - } | |
| 358 | - } | |
| 359 | -} | |
| 360 | - | |
| 361 | -/** | |
| 362 | - * Main CryptX functions with backward compatibility | |
| 363 | - */ | |
| 364 | - | |
| 365 | -/** | |
| 366 | - * Securely decrypts and validates a URL before navigation | |
| 367 | - * @param {string} encryptedUrl | |
| 368 | - * @param {string} password | |
| 369 | - */ | |
| 370 | -async function secureDecryptAndNavigate(encryptedUrl, password = 'default_key', iterations) { | |
| 371 | - if (typeof encryptedUrl !== 'string' || encryptedUrl.length === 0) { | |
| 372 | - console.error('Invalid encrypted URL provided'); | |
| 373 | - return; | |
| 374 | - } | |
| 375 | - | |
| 376 | - try { | |
| 377 | - let decryptedUrl; | |
| 378 | - | |
| 379 | - // Try modern decryption first, then fall back to original algorithm | |
| 380 | - try { | |
| 381 | - decryptedUrl = await SecureEncryption.decrypt(encryptedUrl, password, iterations); | |
| 382 | - } catch (modernError) { | |
| 383 | - console.warn('Modern decryption failed, trying original algorithm'); | |
| 384 | - decryptedUrl = LegacyEncryption.originalDecrypt(encryptedUrl); | |
| 385 | - } | |
| 386 | - | |
| 387 | - const validatedUrl = SecureUtils.validateUrl(decryptedUrl); | |
| 388 | - if (!validatedUrl) { | |
| 389 | - console.error('Invalid or unsafe URL detected'); | |
| 390 | - return; | |
| 391 | - } | |
| 392 | - | |
| 393 | - window.location.href = validatedUrl; | |
| 394 | - | |
| 395 | - } catch (error) { | |
| 396 | - console.error('Error during URL decryption and navigation:', error.message); | |
| 397 | - } | |
| 398 | -} | |
| 399 | - | |
| 400 | -/** | |
| 401 | - * Legacy function for backward compatibility - using original algorithm | |
| 402 | - * @param {string} encryptedString | |
| 403 | - * @returns {string|null} | |
| 404 | - */ | |
| 405 | -function DeCryptString(encryptedString) { | |
| 406 | - try { | |
| 407 | - return LegacyEncryption.originalDecrypt(encryptedString); | |
| 408 | - } catch (error) { | |
| 409 | - console.error('Legacy decryption failed:', error.message); | |
| 410 | - return null; | |
| 411 | - } | |
| 412 | -} | |
| 413 | - | |
| 414 | -/** | |
| 415 | - * Legacy function for backward compatibility - secured | |
| 416 | - * @param {string} encryptedUrl | |
| 417 | - */ | |
| 418 | -function DeCryptX(encryptedUrl) { | |
| 419 | - const decryptedUrl = DeCryptString(encryptedUrl); | |
| 420 | - if (!decryptedUrl) { | |
| 421 | - console.error('Failed to decrypt URL'); | |
| 422 | - return; | |
| 423 | - } | |
| 424 | - | |
| 425 | - const validatedUrl = SecureUtils.validateUrl(decryptedUrl); | |
| 426 | - if (!validatedUrl) { | |
| 427 | - console.error('Invalid or unsafe URL detected'); | |
| 428 | - return; | |
| 429 | - } | |
| 430 | - | |
| 431 | - window.location.href = validatedUrl; | |
| 432 | -} | |
| 433 | - | |
| 434 | -/** | |
| 435 | - * Generates encrypted email link with proper security | |
| 436 | - * @param {string} emailAddress | |
| 437 | - * @param {string} password | |
| 438 | - * @returns {Promise<string>} | |
| 439 | - */ | |
| 440 | -async function generateSecureEmailLink(emailAddress, password = 'default_key') { | |
| 441 | - if (typeof emailAddress !== 'string' || emailAddress.length === 0) { | |
| 442 | - throw new Error('Valid email address required'); | |
| 443 | - } | |
| 444 | - | |
| 445 | - const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/; | |
| 446 | - if (!emailRegex.test(emailAddress)) { | |
| 447 | - throw new Error('Invalid email format'); | |
| 448 | - } | |
| 449 | - | |
| 450 | - const mailtoUrl = `mailto:${emailAddress}`; | |
| 451 | - const encryptedData = await SecureEncryption.encrypt(mailtoUrl, password); | |
| 452 | - const escapedData = SecureUtils.escapeJavaScript(encryptedData); | |
| 453 | - | |
| 454 | - // The iteration count goes in as well, for the same reason the PHP side | |
| 455 | - // puts it in data-cxi: encrypt() used whatever ITERATIONS says right now, | |
| 456 | - // and without recording that, a later change to the setting would leave | |
| 457 | - // this link unopenable. Nothing in the plugin calls this function -- it is | |
| 458 | - // here for anyone building links themselves -- which is exactly why it | |
| 459 | - // should not be the one place that still breaks. | |
| 460 | - return `javascript:secureDecryptAndNavigate('${escapedData}', '${SecureUtils.escapeJavaScript(password)}', ${ITERATIONS})`; | |
| 461 | -} | |
| 462 | - | |
| 463 | -/** | |
| 464 | - * Legacy function for backward compatibility - using original algorithm | |
| 465 | - * @param {string} emailAddress | |
| 466 | - * @returns {string} | |
| 467 | - */ | |
| 468 | -function generateDeCryptXHandler(emailAddress) { | |
| 469 | - if (typeof emailAddress !== 'string' || emailAddress.length === 0) { | |
| 470 | - console.error('Valid email address required'); | |
| 471 | - return 'javascript:void(0)'; | |
| 472 | - } | |
| 473 | - | |
| 474 | - try { | |
| 475 | - const encrypted = LegacyEncryption.originalEncrypt(emailAddress); | |
| 476 | - const escaped = SecureUtils.escapeJavaScript(encrypted); | |
| 477 | - return `javascript:DeCryptX('${escaped}')`; | |
| 478 | - } catch (error) { | |
| 479 | - console.error('Error generating handler:', error.message); | |
| 480 | - return 'javascript:void(0)'; | |
| 481 | - } | |
| 482 | -} | |
| 483 | - | |
| 484 | -/** | |
| 485 | - * Legacy function - matches original PHP generateHashFromString | |
| 486 | - * @param {string} inputString | |
| 487 | - * @returns {string} | |
| 488 | - */ | |
| 489 | -function generateHashFromString(inputString) { | |
| 490 | - try { | |
| 491 | - return LegacyEncryption.originalEncrypt(inputString); | |
| 492 | - } catch (error) { | |
| 493 | - console.error('Error generating hash:', error.message); | |
| 494 | - return ''; | |
| 495 | - } | |
| 496 | -} | |
| 497 | - | |
| 498 | -/** | |
| 499 | - * CSP-safe link handling | |
| 500 | - * | |
| 501 | - * Markup produced by the PHP side (no javascript: URI, therefore no | |
| 502 | - * 'unsafe-inline' needed in the Content-Security-Policy): | |
| 503 | - * | |
| 504 | - * <a href="#" class="cryptx-link" data-cx="BASE64" data-cxk="PASSWORD" data-cxm="secure" data-cxi="10000">…</a> | |
| 505 | - * <a href="#" class="cryptx-link" data-cx="0i2p2h…" data-cxm="legacy">…</a> | |
| 506 | - * | |
| 507 | - * A single delegated listener on `document` covers links that are added later | |
| 508 | - * (widgets, AJAX, block editor preview). The legacy javascript: entry points | |
| 509 | - * above stay untouched for pages that were cached before this version. | |
| 510 | - */ | |
| 511 | - | |
| 512 | -const CRYPTX_LINK_CLASS = 'cryptx-link'; | |
| 513 | -const CRYPTX_ATTR_PAYLOAD = 'data-cx'; | |
| 514 | -const CRYPTX_ATTR_KEY = 'data-cxk'; | |
| 515 | -const CRYPTX_ATTR_MODE = 'data-cxm'; | |
| 516 | -const CRYPTX_ATTR_ITERATIONS = 'data-cxi'; | |
| 517 | -const CRYPTX_MAX_DELEGATION_DEPTH = 50; | |
| 518 | - | |
| 519 | -let cryptxLinkHandlerAttached = false; | |
| 520 | - | |
| 521 | -/** | |
| 522 | - * True only when the Web Crypto API is usable (secure context, modern browser) | |
| 523 | - * @returns {boolean} | |
| 524 | - */ | |
| 525 | -function cryptxHasSubtleCrypto() { | |
| 526 | - return typeof crypto !== 'undefined' && | |
| 527 | - !!crypto && | |
| 528 | - !!crypto.subtle && | |
| 529 | - typeof crypto.subtle.importKey === 'function'; | |
| 530 | -} | |
| 531 | - | |
| 532 | -/** | |
| 533 | - * @param {*} element | |
| 534 | - * @returns {boolean} | |
| 535 | - */ | |
| 536 | -function isCryptxLink(element) { | |
| 537 | - if (!element || typeof element.getAttribute !== 'function') { | |
| 538 | - return false; | |
| 539 | - } | |
| 540 | - | |
| 541 | - if (element.classList && typeof element.classList.contains === 'function') { | |
| 542 | - return element.classList.contains(CRYPTX_LINK_CLASS); | |
| 543 | - } | |
| 544 | - | |
| 545 | - if (typeof element.className === 'string') { | |
| 546 | - return (' ' + element.className + ' ').indexOf(' ' + CRYPTX_LINK_CLASS + ' ') !== -1; | |
| 547 | - } | |
| 548 | - | |
| 549 | - return false; | |
| 550 | -} | |
| 551 | - | |
| 552 | -/** | |
| 553 | - * Walks up from the event target to the CryptX link (clicks may land on a | |
| 554 | - * child element, e.g. an <img> or <span> inside the anchor). | |
| 555 | - * @param {*} startNode | |
| 556 | - * @returns {*|null} | |
| 557 | - */ | |
| 558 | -function findCryptxLink(startNode) { | |
| 559 | - let node = startNode; | |
| 560 | - let depth = 0; | |
| 561 | - | |
| 562 | - while (node && depth < CRYPTX_MAX_DELEGATION_DEPTH) { | |
| 563 | - if (isCryptxLink(node)) { | |
| 564 | - return node; | |
| 565 | - } | |
| 566 | - node = node.parentElement || node.parentNode || null; | |
| 567 | - depth++; | |
| 568 | - } | |
| 569 | - | |
| 570 | - return null; | |
| 571 | -} | |
| 572 | - | |
| 573 | -/** | |
| 574 | - * Decrypts a data-cx payload according to data-cxm. | |
| 575 | - * Missing mode behaves like "secure" with a fallback to "legacy", | |
| 576 | - * exactly like secureDecryptAndNavigate() does. | |
| 577 | - * @param {string} payload | |
| 578 | - * @param {string|null} password | |
| 579 | - * @param {string|null} mode | |
| 580 | - * @param {string|number|null} [iterations] What data-cxi says. Links written | |
| 581 | - * before 4.2.0 do not carry it and fall back to the configured value -- which | |
| 582 | - * is why changing that value used to break every link already delivered. | |
| 583 | - * @returns {Promise<string>} | |
| 584 | - */ | |
| 585 | -async function cryptxDecryptPayload(payload, password, mode, iterations) { | |
| 586 | - if (typeof payload !== 'string' || payload.length === 0) { | |
| 587 | - throw new Error('Missing or invalid data-cx payload'); | |
| 588 | - } | |
| 589 | - | |
| 590 | - const normalizedMode = typeof mode === 'string' ? mode.trim().toLowerCase() : ''; | |
| 591 | - | |
| 592 | - if (normalizedMode === 'legacy') { | |
| 593 | - return LegacyEncryption.originalDecrypt(payload); | |
| 594 | - } | |
| 595 | - | |
| 596 | - if (!cryptxHasSubtleCrypto()) { | |
| 597 | - if (normalizedMode === 'secure') { | |
| 598 | - throw new Error('Web Crypto API (crypto.subtle) is not available in this context'); | |
| 599 | - } | |
| 600 | - return LegacyEncryption.originalDecrypt(payload); | |
| 601 | - } | |
| 602 | - | |
| 603 | - const key = typeof password === 'string' && password.length > 0 ? password : 'default_key'; | |
| 604 | - const rounds = parseInt(iterations, 10); | |
| 605 | - | |
| 606 | - try { | |
| 607 | - return await SecureEncryption.decrypt(payload, key, rounds); | |
| 608 | - } catch (secureError) { | |
| 609 | - if (normalizedMode === 'secure') { | |
| 610 | - throw secureError; | |
| 611 | - } | |
| 612 | - console.warn('CryptX: modern decryption failed, trying original algorithm'); | |
| 613 | - return LegacyEncryption.originalDecrypt(payload); | |
| 614 | - } | |
| 615 | -} | |
| 616 | - | |
| 617 | -/** | |
| 618 | - * Delegated click handler. Never navigates without SecureUtils.validateUrl(). | |
| 619 | - * @param {Object} event | |
| 620 | - * @returns {Promise<void>} | |
| 621 | - */ | |
| 622 | -async function handleCryptxLinkClick(event) { | |
| 623 | - if (!event) { | |
| 624 | - return; | |
| 625 | - } | |
| 626 | - | |
| 627 | - const link = findCryptxLink(event.target); | |
| 628 | - if (!link) { | |
| 629 | - return; | |
| 630 | - } | |
| 631 | - | |
| 632 | - // Suppress the "#" jump before anything asynchronous happens. | |
| 633 | - if (typeof event.preventDefault === 'function') { | |
| 634 | - event.preventDefault(); | |
| 635 | - } | |
| 636 | - | |
| 637 | - const payload = link.getAttribute(CRYPTX_ATTR_PAYLOAD); | |
| 638 | - const password = link.getAttribute(CRYPTX_ATTR_KEY); | |
| 639 | - const mode = link.getAttribute(CRYPTX_ATTR_MODE); | |
| 640 | - const iterations = link.getAttribute(CRYPTX_ATTR_ITERATIONS); | |
| 641 | - | |
| 642 | - try { | |
| 643 | - const decryptedUrl = await cryptxDecryptPayload(payload, password, mode, iterations); | |
| 644 | - | |
| 645 | - const validatedUrl = SecureUtils.validateUrl(decryptedUrl); | |
| 646 | - if (!validatedUrl) { | |
| 647 | - console.error('CryptX: invalid or unsafe URL detected, navigation aborted'); | |
| 648 | - return; | |
| 649 | - } | |
| 650 | - | |
| 651 | - window.location.href = validatedUrl; | |
| 652 | - } catch (error) { | |
| 653 | - console.error('CryptX: could not resolve link target:', error && error.message ? error.message : error); | |
| 654 | - } | |
| 655 | -} | |
| 656 | - | |
| 657 | -/** | |
| 658 | - * Attaches the single delegated listener. Idempotent. | |
| 659 | - * @param {Object} [targetDocument] | |
| 660 | - * @returns {boolean} true when the listener was attached by this call | |
| 661 | - */ | |
| 662 | -function initCryptxLinkHandler(targetDocument) { | |
| 663 | - const doc = targetDocument || (typeof document !== 'undefined' ? document : null); | |
| 664 | - | |
| 665 | - if (!doc || typeof doc.addEventListener !== 'function') { | |
| 666 | - return false; | |
| 667 | - } | |
| 668 | - | |
| 669 | - if (cryptxLinkHandlerAttached) { | |
| 670 | - return false; | |
| 671 | - } | |
| 672 | - | |
| 673 | - doc.addEventListener('click', handleCryptxLinkClick, false); | |
| 674 | - cryptxLinkHandlerAttached = true; | |
| 675 | - | |
| 676 | - return true; | |
| 677 | -} | |
| 678 | - | |
| 679 | -// Attach immediately - delegation on `document` needs no finished DOM, so this | |
| 680 | -// works for a <head> include as well as for a footer include, where | |
| 681 | -// DOMContentLoaded may already have fired and would never come again. | |
| 682 | -if (typeof document !== 'undefined' && typeof document.addEventListener === 'function') { | |
| 683 | - initCryptxLinkHandler(document); | |
| 684 | - | |
| 685 | - if (document.readyState === 'loading') { | |
| 686 | - // Safety net for exotic environments that replace `document` while parsing. | |
| 687 | - document.addEventListener('DOMContentLoaded', function () { | |
| 688 | - initCryptxLinkHandler(document); | |
| 689 | - }); | |
| 690 | - } | |
| 691 | -} | |
| 692 | - | |
| 693 | -// Keep everything reachable by name, also after minification. | |
| 694 | -// | |
| 695 | -// The three the plugin itself depends on are secureDecryptAndNavigate and | |
| 696 | -// DeCryptX, which appear in the generated "javascript:" links, and | |
| 697 | -// generateDeCryptXHandler, which the help tab documents for use in a theme. | |
| 698 | -// The rest is kept because it has been exported for years; new code should use | |
| 699 | -// the window.CryptX namespace, and the bare names will go with the next major | |
| 700 | -// release, together with the deprecated encryptx(). | |
| 701 | -if (typeof window !== 'undefined') { | |
| 702 | - window.CryptX = { | |
| 703 | - secureDecryptAndNavigate, | |
| 704 | - DeCryptX, | |
| 705 | - DeCryptString, | |
| 706 | - generateSecureEmailLink, | |
| 707 | - generateDeCryptXHandler, | |
| 708 | - generateHashFromString, | |
| 709 | - handleCryptxLinkClick, | |
| 710 | - initCryptxLinkHandler, | |
| 711 | - SecureUtils, | |
| 712 | - LegacyEncryption, | |
| 713 | - SecureEncryption | |
| 714 | - }; | |
| 715 | - | |
| 716 | - window.secureDecryptAndNavigate = secureDecryptAndNavigate; | |
| 717 | - window.DeCryptX = DeCryptX; | |
| 718 | - window.DeCryptString = DeCryptString; | |
| 719 | - window.generateSecureEmailLink = generateSecureEmailLink; | |
| 720 | - window.generateDeCryptXHandler = generateDeCryptXHandler; | |
| 721 | - window.generateHashFromString = generateHashFromString; | |
| 722 | - window.handleCryptxLinkClick = handleCryptxLinkClick; | |
| 723 | - window.initCryptxLinkHandler = initCryptxLinkHandler; | |
| 724 | - window.SecureUtils = SecureUtils; | |
| 725 | - window.LegacyEncryption = LegacyEncryption; | |
| 726 | - window.SecureEncryption = SecureEncryption; | |
| 727 | -} | |
| 728 | - | |
| 729 | -// Export functions for module usage | |
| 730 | -if (typeof module !== 'undefined' && module.exports) { | |
| 731 | - module.exports = { | |
| 732 | - secureDecryptAndNavigate, | |
| 733 | - generateSecureEmailLink, | |
| 734 | - DeCryptX, | |
| 735 | - DeCryptString, | |
| 736 | - generateDeCryptXHandler, | |
| 737 | - generateHashFromString, | |
| 738 | - handleCryptxLinkClick, | |
| 739 | - initCryptxLinkHandler, | |
| 740 | - cryptxDecryptPayload, | |
| 741 | - SecureEncryption, | |
| 742 | - LegacyEncryption, | |
| 743 | - SecureUtils | |
| 744 | - }; | |
| 745 | -} | |
| 746 | -})(); | |
| 19 | +function DeCryptX( s ) | |
| 20 | +{ | |
| 21 | + location.href=DeCryptString( s ); | |
| 22 | +} | |
