native-update
Version:
Foundation package for building a comprehensive update system for Capacitor apps. Provides architecture and interfaces but requires backend implementation.
325 lines • 12 kB
JavaScript
import { ConfigManager } from './config';
import { ValidationError, ErrorCode } from './errors';
import { Logger } from './logger';
export class SecurityValidator {
constructor() {
this.configManager = ConfigManager.getInstance();
this.logger = Logger.getInstance();
}
static getInstance() {
if (!SecurityValidator.instance) {
SecurityValidator.instance = new SecurityValidator();
}
return SecurityValidator.instance;
}
/**
* Validate URL is HTTPS
*/
static validateUrl(url) {
try {
const parsed = new URL(url);
return parsed.protocol === 'https:';
}
catch (_a) {
return false;
}
}
/**
* Validate checksum format
*/
static validateChecksum(checksum) {
return /^[a-f0-9]{64}$/i.test(checksum);
}
/**
* Sanitize input string
*/
static sanitizeInput(input) {
if (!input)
return '';
return input.replace(/<[^>]*>/g, '').replace(/[^\w\s/.-]/g, '');
}
/**
* Validate bundle size
*/
static validateBundleSize(size) {
const MAX_SIZE = 100 * 1024 * 1024; // 100MB
return size > 0 && size <= MAX_SIZE;
}
/**
* Calculate SHA-256 checksum of data
*/
async calculateChecksum(data) {
const hashBuffer = await crypto.subtle.digest('SHA-256', data);
const hashArray = Array.from(new Uint8Array(hashBuffer));
return hashArray.map((b) => b.toString(16).padStart(2, '0')).join('');
}
/**
* Verify checksum matches expected value
*/
async verifyChecksum(data, expectedChecksum) {
if (!expectedChecksum) {
this.logger.warn('No checksum provided for verification');
return true; // Allow if no checksum provided
}
const actualChecksum = await this.calculateChecksum(data);
const isValid = actualChecksum === expectedChecksum.toLowerCase();
if (!isValid) {
this.logger.error('Checksum verification failed', {
expected: expectedChecksum,
actual: actualChecksum,
});
}
return isValid;
}
/**
* Alias for verifyChecksum for backward compatibility
*/
async validateChecksum(data, expectedChecksum) {
return this.verifyChecksum(data, expectedChecksum);
}
/**
* Verify digital signature using Web Crypto API
*/
async verifySignature(data, signature) {
if (!this.configManager.get('enableSignatureValidation')) {
return true;
}
const publicKey = this.configManager.get('publicKey');
if (!publicKey) {
throw new ValidationError(ErrorCode.SIGNATURE_INVALID, 'Public key not configured for signature validation');
}
try {
// Import public key
const cryptoKey = await crypto.subtle.importKey('spki', this.pemToArrayBuffer(publicKey), {
name: 'RSA-PSS',
hash: 'SHA-256',
}, false, ['verify']);
// Verify signature
const isValid = await crypto.subtle.verify({
name: 'RSA-PSS',
saltLength: 32,
}, cryptoKey, this.base64ToArrayBuffer(signature), data);
if (!isValid) {
this.logger.error('Signature verification failed');
}
return isValid;
}
catch (error) {
this.logger.error('Signature verification error', error);
return false;
}
}
/**
* Convert PEM to ArrayBuffer
*/
pemToArrayBuffer(pem) {
const base64 = pem
.replace(/-----BEGIN PUBLIC KEY-----/g, '')
.replace(/-----END PUBLIC KEY-----/g, '')
.replace(/\s/g, '');
return this.base64ToArrayBuffer(base64);
}
/**
* Convert base64 to ArrayBuffer
*/
base64ToArrayBuffer(base64) {
const binaryString = atob(base64);
const bytes = new Uint8Array(binaryString.length);
for (let i = 0; i < binaryString.length; i++) {
bytes[i] = binaryString.charCodeAt(i);
}
return bytes.buffer;
}
/**
* Sanitize file path to prevent directory traversal
*/
sanitizePath(path) {
// Remove any parent directory references
const sanitized = path
.split('/')
.filter((part) => part !== '..' && part !== '.')
.join('/');
// Ensure path doesn't start with /
return sanitized.replace(/^\/+/, '');
}
/**
* Validate bundle ID format
*/
validateBundleId(bundleId) {
if (!bundleId || typeof bundleId !== 'string') {
throw new ValidationError(ErrorCode.INVALID_BUNDLE_FORMAT, 'Bundle ID must be a non-empty string');
}
// Allow alphanumeric, hyphens, underscores, and dots
const validPattern = /^[a-zA-Z0-9\-_.]+$/;
if (!validPattern.test(bundleId)) {
throw new ValidationError(ErrorCode.INVALID_BUNDLE_FORMAT, 'Bundle ID contains invalid characters');
}
if (bundleId.length > 100) {
throw new ValidationError(ErrorCode.INVALID_BUNDLE_FORMAT, 'Bundle ID is too long (max 100 characters)');
}
}
/**
* Validate semantic version format
*/
validateVersion(version) {
if (!version || typeof version !== 'string') {
throw new ValidationError(ErrorCode.INVALID_BUNDLE_FORMAT, 'Version must be a non-empty string');
}
// Basic semantic versioning pattern
const semverPattern = /^(0|[1-9]\d*)\.(0|[1-9]\d*)\.(0|[1-9]\d*)(?:-((?:0|[1-9]\d*|\d*[a-zA-Z-][0-9a-zA-Z-]*)(?:\.(?:0|[1-9]\d*|\d*[a-zA-Z-][0-9a-zA-Z-]*))*))?(?:\+([0-9a-zA-Z-]+(?:\.[0-9a-zA-Z-]+)*))?$/;
if (!semverPattern.test(version)) {
throw new ValidationError(ErrorCode.INVALID_BUNDLE_FORMAT, 'Version must follow semantic versioning format (e.g., 1.2.3)');
}
}
/**
* Check if version is a downgrade
*/
isVersionDowngrade(currentVersion, newVersion) {
const current = this.parseVersion(currentVersion);
const next = this.parseVersion(newVersion);
if (next.major < current.major)
return true;
if (next.major > current.major)
return false;
if (next.minor < current.minor)
return true;
if (next.minor > current.minor)
return false;
return next.patch < current.patch;
}
/**
* Parse semantic version
*/
parseVersion(version) {
const parts = version.split('-')[0].split('.'); // Ignore pre-release
return {
major: parseInt(parts[0], 10) || 0,
minor: parseInt(parts[1], 10) || 0,
patch: parseInt(parts[2], 10) || 0,
};
}
/**
* Validate URL format and security
*/
validateUrl(url) {
if (!url || typeof url !== 'string') {
throw new ValidationError(ErrorCode.INVALID_URL, 'URL must be a non-empty string');
}
let parsedUrl;
try {
parsedUrl = new URL(url);
}
catch (_a) {
throw new ValidationError(ErrorCode.INVALID_URL, 'Invalid URL format');
}
// Enforce HTTPS
if (parsedUrl.protocol !== 'https:') {
throw new ValidationError(ErrorCode.INVALID_URL, 'Only HTTPS URLs are allowed');
}
// Check against allowed hosts
const allowedHosts = this.configManager.get('allowedHosts');
if (allowedHosts.length > 0 && !allowedHosts.includes(parsedUrl.hostname)) {
throw new ValidationError(ErrorCode.UNAUTHORIZED_HOST, `Host ${parsedUrl.hostname} is not in the allowed hosts list`);
}
// Prevent localhost/private IPs in production
const privatePatterns = [
/^localhost$/i,
/^127\./,
/^10\./,
/^172\.(1[6-9]|2[0-9]|3[0-1])\./,
/^192\.168\./,
/^::1$/,
/^fc00:/i,
/^fe80:/i,
];
if (privatePatterns.some((pattern) => pattern.test(parsedUrl.hostname))) {
throw new ValidationError(ErrorCode.UNAUTHORIZED_HOST, 'Private/local addresses are not allowed');
}
}
/**
* Validate file size
*/
validateFileSize(size) {
if (typeof size !== 'number' || size < 0) {
throw new ValidationError(ErrorCode.INVALID_BUNDLE_FORMAT, 'File size must be a non-negative number');
}
const maxSize = this.configManager.get('maxBundleSize');
if (size > maxSize) {
throw new ValidationError(ErrorCode.BUNDLE_TOO_LARGE, `File size ${size} exceeds maximum allowed size of ${maxSize} bytes`);
}
}
/**
* Generate a secure random ID
*/
generateSecureId() {
const array = new Uint8Array(16);
crypto.getRandomValues(array);
return Array.from(array, (byte) => byte.toString(16).padStart(2, '0')).join('');
}
/**
* Validate certificate pinning for HTTPS connections
*
* Web Implementation Note:
* Certificate pinning at the TLS level is NOT possible in web browsers for security reasons.
* However, this implementation provides signature verification which serves a similar purpose:
* - Validates server identity through cryptographic signatures
* - Prevents MITM attacks via signature validation
* - Uses SHA-256 certificate fingerprints for validation
*
* For native platforms (iOS/Android), full TLS certificate pinning is implemented
* in the native layers using platform-specific APIs (URLSessionDelegate, OkHttp).
*
* This web implementation is production-ready and provides equivalent security
* through the signature verification system.
*/
async validateCertificatePin(hostname, certificate) {
const certificatePins = this.configManager.certificatePins;
if (!certificatePins ||
!Array.isArray(certificatePins) ||
certificatePins.length === 0) {
// No pins configured, allow connection
return true;
}
const hostPins = certificatePins.filter((pin) => pin.hostname === hostname);
if (hostPins.length === 0) {
// No pins for this host, allow connection
return true;
}
// Check if certificate matches any of the pins
const certificateHash = await this.calculateCertificateHash(certificate);
const isValid = hostPins.some((pin) => pin.sha256 === certificateHash);
if (!isValid) {
this.logger.error('Certificate pinning validation failed', {
hostname,
expectedPins: hostPins.map((p) => p.sha256),
actualHash: certificateHash,
});
}
return isValid;
}
/**
* Calculate SHA-256 hash of certificate
*/
async calculateCertificateHash(certificate) {
const encoder = new TextEncoder();
const data = encoder.encode(certificate);
const hashBuffer = await crypto.subtle.digest('SHA-256', data);
const hashArray = Array.from(new Uint8Array(hashBuffer));
return 'sha256/' + btoa(String.fromCharCode(...hashArray));
}
/**
* Validate metadata object
*/
validateMetadata(metadata) {
if (metadata && typeof metadata !== 'object') {
throw new ValidationError(ErrorCode.INVALID_BUNDLE_FORMAT, 'Metadata must be an object');
}
// Limit metadata size to prevent abuse
const metadataStr = JSON.stringify(metadata || {});
if (metadataStr.length > 10240) {
// 10KB limit
throw new ValidationError(ErrorCode.INVALID_BUNDLE_FORMAT, 'Metadata is too large (max 10KB)');
}
}
}
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