| 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)); |
| 51 |
} |
| 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 |
} |
| 116 |
} |
| 117 |
|
| 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 |
/** |
| 520 |
* True only when the Web Crypto API is usable (secure context, modern browser) |
| 521 |
* @returns {boolean} |
| 522 |
*/ |
| 523 |
function cryptxHasSubtleCrypto() { |
| 524 |
return typeof crypto !== 'undefined' && |
| 525 |
!!crypto && |
| 526 |
!!crypto.subtle && |
| 527 |
typeof crypto.subtle.importKey === 'function'; |
| 528 |
} |
| 529 |
|
| 530 |
/** |
| 531 |
* @param {*} element |
| 532 |
* @returns {boolean} |
| 533 |
*/ |
| 534 |
function isCryptxLink(element) { |
| 535 |
if (!element || typeof element.getAttribute !== 'function') { |
| 536 |
return false; |
| 537 |
} |
| 538 |
|
| 539 |
if (element.classList && typeof element.classList.contains === 'function') { |
| 540 |
return element.classList.contains(CRYPTX_LINK_CLASS); |
| 541 |
} |
| 542 |
|
| 543 |
if (typeof element.className === 'string') { |
| 544 |
return (' ' + element.className + ' ').indexOf(' ' + CRYPTX_LINK_CLASS + ' ') !== -1; |
| 545 |
} |
| 546 |
|
| 547 |
return false; |
| 548 |
} |
| 549 |
|
| 550 |
/** |
| 551 |
* Walks up from the event target to the CryptX link (clicks may land on a |
| 552 |
* child element, e.g. an <img> or <span> inside the anchor). |
| 553 |
* @param {*} startNode |
| 554 |
* @returns {*|null} |
| 555 |
*/ |
| 556 |
function findCryptxLink(startNode) { |
| 557 |
let node = startNode; |
| 558 |
let depth = 0; |
| 559 |
|
| 560 |
while (node && depth < CRYPTX_MAX_DELEGATION_DEPTH) { |
| 561 |
if (isCryptxLink(node)) { |
| 562 |
return node; |
| 563 |
} |
| 564 |
node = node.parentElement || node.parentNode || null; |
| 565 |
depth++; |
| 566 |
} |
| 567 |
|
| 568 |
return null; |
| 569 |
} |
| 570 |
|
| 571 |
/** |
| 572 |
* Decrypts a data-cx payload according to data-cxm. |
| 573 |
* Missing mode behaves like "secure" with a fallback to "legacy", |
| 574 |
* exactly like secureDecryptAndNavigate() does. |
| 575 |
* @param {string} payload |
| 576 |
* @param {string|null} password |
| 577 |
* @param {string|null} mode |
| 578 |
* @param {string|number|null} [iterations] What data-cxi says. Links written |
| 579 |
* before 4.2.0 do not carry it and fall back to the configured value -- which |
| 580 |
* is why changing that value used to break every link already delivered. |
| 581 |
* @returns {Promise<string>} |
| 582 |
*/ |
| 583 |
async function cryptxDecryptPayload(payload, password, mode, iterations) { |
| 584 |
if (typeof payload !== 'string' || payload.length === 0) { |
| 585 |
throw new Error('Missing or invalid data-cx payload'); |
| 586 |
} |
| 587 |
|
| 588 |
const normalizedMode = typeof mode === 'string' ? mode.trim().toLowerCase() : ''; |
| 589 |
|
| 590 |
if (normalizedMode === 'legacy') { |
| 591 |
return LegacyEncryption.originalDecrypt(payload); |
| 592 |
} |
| 593 |
|
| 594 |
if (!cryptxHasSubtleCrypto()) { |
| 595 |
if (normalizedMode === 'secure') { |
| 596 |
throw new Error('Web Crypto API (crypto.subtle) is not available in this context'); |
| 597 |
} |
| 598 |
return LegacyEncryption.originalDecrypt(payload); |
| 599 |
} |
| 600 |
|
| 601 |
const key = typeof password === 'string' && password.length > 0 ? password : 'default_key'; |
| 602 |
const rounds = parseInt(iterations, 10); |
| 603 |
|
| 604 |
try { |
| 605 |
return await SecureEncryption.decrypt(payload, key, rounds); |
| 606 |
} catch (secureError) { |
| 607 |
if (normalizedMode === 'secure') { |
| 608 |
throw secureError; |
| 609 |
} |
| 610 |
console.warn('CryptX: modern decryption failed, trying original algorithm'); |
| 611 |
return LegacyEncryption.originalDecrypt(payload); |
| 612 |
} |
| 613 |
} |
| 614 |
|
| 615 |
/** |
| 616 |
* Delegated click handler. Never navigates without SecureUtils.validateUrl(). |
| 617 |
* @param {Object} event |
| 618 |
* @returns {Promise<void>} |
| 619 |
*/ |
| 620 |
async function handleCryptxLinkClick(event) { |
| 621 |
if (!event) { |
| 622 |
return; |
| 623 |
} |
| 624 |
|
| 625 |
const link = findCryptxLink(event.target); |
| 626 |
if (!link) { |
| 627 |
return; |
| 628 |
} |
| 629 |
|
| 630 |
// Suppress the "#" jump before anything asynchronous happens. |
| 631 |
if (typeof event.preventDefault === 'function') { |
| 632 |
event.preventDefault(); |
| 633 |
} |
| 634 |
|
| 635 |
const payload = link.getAttribute(CRYPTX_ATTR_PAYLOAD); |
| 636 |
const password = link.getAttribute(CRYPTX_ATTR_KEY); |
| 637 |
const mode = link.getAttribute(CRYPTX_ATTR_MODE); |
| 638 |
const iterations = link.getAttribute(CRYPTX_ATTR_ITERATIONS); |
| 639 |
|
| 640 |
try { |
| 641 |
const decryptedUrl = await cryptxDecryptPayload(payload, password, mode, iterations); |
| 642 |
|
| 643 |
const validatedUrl = SecureUtils.validateUrl(decryptedUrl); |
| 644 |
if (!validatedUrl) { |
| 645 |
console.error('CryptX: invalid or unsafe URL detected, navigation aborted'); |
| 646 |
return; |
| 647 |
} |
| 648 |
|
| 649 |
window.location.href = validatedUrl; |
| 650 |
} catch (error) { |
| 651 |
console.error('CryptX: could not resolve link target:', error && error.message ? error.message : error); |
| 652 |
} |
| 653 |
} |
| 654 |
|
| 655 |
/** |
| 656 |
* Attaches the single delegated listener. Idempotent. |
| 657 |
* |
| 658 |
* The "attached" flag lives on the document itself (an expando property), |
| 659 |
* not in a closure variable. Two things went wrong with a closure variable: |
| 660 |
* first, any plugin or loader that runs cryptx.js a second time on the same |
| 661 |
* document -- @swup/scripts-plugin does, Turbo/Hotwire does, any AJAX loader |
| 662 |
* that brings footer markup along does -- gets a fresh closure and therefore |
| 663 |
* a second `click` listener on `document`; measured: one click fired |
| 664 |
* `mailto:` twice. Second, initCryptxLinkHandler(otherDocument) is exported |
| 665 |
* for exactly this use but never worked, because the closure flag was |
| 666 |
* already true from the main document and nothing was attached to the one |
| 667 |
* passed in. Marking the document, not the module, fixes both with the same |
| 668 |
* few lines. |
| 669 |
* @param {Object} [targetDocument] |
| 670 |
* @returns {boolean} true when the listener was attached by this call |
| 671 |
*/ |
| 672 |
function initCryptxLinkHandler(targetDocument) { |
| 673 |
const doc = targetDocument || (typeof document !== 'undefined' ? document : null); |
| 674 |
|
| 675 |
if (!doc || typeof doc.addEventListener !== 'function') { |
| 676 |
return false; |
| 677 |
} |
| 678 |
|
| 679 |
if (doc.__cryptxLinkHandlerAttached) { |
| 680 |
return false; |
| 681 |
} |
| 682 |
|
| 683 |
doc.addEventListener('click', handleCryptxLinkClick, false); |
| 684 |
doc.__cryptxLinkHandlerAttached = true; |
| 685 |
|
| 686 |
return true; |
| 687 |
} |
| 688 |
|
| 689 |
// Attach immediately - delegation on `document` needs no finished DOM, so this |
| 690 |
// works for a <head> include as well as for a footer include, where |
| 691 |
// DOMContentLoaded may already have fired and would never come again. |
| 692 |
if (typeof document !== 'undefined' && typeof document.addEventListener === 'function') { |
| 693 |
initCryptxLinkHandler(document); |
| 694 |
|
| 695 |
if (document.readyState === 'loading') { |
| 696 |
// Safety net for exotic environments that replace `document` while parsing. |
| 697 |
document.addEventListener('DOMContentLoaded', function () { |
| 698 |
initCryptxLinkHandler(document); |
| 699 |
}); |
| 700 |
} |
| 701 |
} |
| 702 |
|
| 703 |
// Keep everything reachable by name, also after minification. |
| 704 |
// |
| 705 |
// The three the plugin itself depends on are secureDecryptAndNavigate and |
| 706 |
// DeCryptX, which appear in the generated "javascript:" links, and |
| 707 |
// generateDeCryptXHandler, which the help tab documents for use in a theme. |
| 708 |
// The rest is kept because it has been exported for years; new code should use |
| 709 |
// the window.CryptX namespace, and the bare names will go with the next major |
| 710 |
// release, together with the deprecated encryptx(). |
| 711 |
if (typeof window !== 'undefined') { |
| 712 |
window.CryptX = { |
| 713 |
secureDecryptAndNavigate, |
| 714 |
DeCryptX, |
| 715 |
DeCryptString, |
| 716 |
generateSecureEmailLink, |
| 717 |
generateDeCryptXHandler, |
| 718 |
generateHashFromString, |
| 719 |
handleCryptxLinkClick, |
| 720 |
initCryptxLinkHandler, |
| 721 |
SecureUtils, |
| 722 |
LegacyEncryption, |
| 723 |
SecureEncryption |
| 724 |
}; |
| 725 |
|
| 726 |
window.secureDecryptAndNavigate = secureDecryptAndNavigate; |
| 727 |
window.DeCryptX = DeCryptX; |
| 728 |
window.DeCryptString = DeCryptString; |
| 729 |
window.generateSecureEmailLink = generateSecureEmailLink; |
| 730 |
window.generateDeCryptXHandler = generateDeCryptXHandler; |
| 731 |
window.generateHashFromString = generateHashFromString; |
| 732 |
window.handleCryptxLinkClick = handleCryptxLinkClick; |
| 733 |
window.initCryptxLinkHandler = initCryptxLinkHandler; |
| 734 |
window.SecureUtils = SecureUtils; |
| 735 |
window.LegacyEncryption = LegacyEncryption; |
| 736 |
window.SecureEncryption = SecureEncryption; |
| 737 |
} |
| 738 |
|
| 739 |
// Export functions for module usage |
| 740 |
if (typeof module !== 'undefined' && module.exports) { |
| 741 |
module.exports = { |
| 742 |
secureDecryptAndNavigate, |
| 743 |
generateSecureEmailLink, |
| 744 |
DeCryptX, |
| 745 |
DeCryptString, |
| 746 |
generateDeCryptXHandler, |
| 747 |
generateHashFromString, |
| 748 |
handleCryptxLinkClick, |
| 749 |
initCryptxLinkHandler, |
| 750 |
cryptxDecryptPayload, |
| 751 |
SecureEncryption, |
| 752 |
LegacyEncryption, |
| 753 |
SecureUtils |
| 754 |
}; |
| 755 |
} |
| 756 |
})(); |
| 757 |
|
