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* Data Sanitization for Error Monitoring
*
* Redacts sensitive information from error data before storage.
* Prevents accidental PII or credential exposure in error logs.
*/
/**
* Patterns that indicate sensitive data
* Order matters - more specific patterns should come first
*/
const SENSITIVE_PATTERNS: Array<{ pattern: RegExp; replacement: string }> = [
// Authorization headers
{ pattern: /Bearer\s+[A-Za-z0-9\-_]+\.[A-Za-z0-9\-_]+\.[A-Za-z0-9\-_]+/gi, replacement: 'Bearer [JWT_REDACTED]' },
{ pattern: /Bearer\s+\S+/gi, replacement: 'Bearer [TOKEN_REDACTED]' },
{ pattern: /Basic\s+[A-Za-z0-9+/=]+/gi, replacement: 'Basic [CREDENTIALS_REDACTED]' },
// API keys and tokens (common patterns)
{ pattern: /api[_-]?key[=:]["']?\s*[A-Za-z0-9\-_]{16,}/gi, replacement: 'api_key=[KEY_REDACTED]' },
{ pattern: /secret[_-]?key[=:]["']?\s*[A-Za-z0-9\-_]{16,}/gi, replacement: 'secret_key=[KEY_REDACTED]' },
{ pattern: /access[_-]?token[=:]["']?\s*[A-Za-z0-9\-_]{16,}/gi, replacement: 'access_token=[TOKEN_REDACTED]' },
{ pattern: /refresh[_-]?token[=:]["']?\s*[A-Za-z0-9\-_]{16,}/gi, replacement: 'refresh_token=[TOKEN_REDACTED]' },
// Passwords
{ pattern: /password[=:]["']?\s*\S+/gi, replacement: 'password=[PASSWORD_REDACTED]' },
{ pattern: /passwd[=:]["']?\s*\S+/gi, replacement: 'passwd=[PASSWORD_REDACTED]' },
{ pattern: /pwd[=:]["']?\s*\S+/gi, replacement: 'pwd=[PASSWORD_REDACTED]' },
// Database connection strings
{ pattern: /mysql:\/\/[^@]+@[^\s]+/gi, replacement: 'mysql://[DB_REDACTED]' },
{ pattern: /postgres:\/\/[^@]+@[^\s]+/gi, replacement: 'postgres://[DB_REDACTED]' },
{ pattern: /mongodb:\/\/[^@]+@[^\s]+/gi, replacement: 'mongodb://[DB_REDACTED]' },
{ pattern: /redis:\/\/[^@]+@[^\s]+/gi, replacement: 'redis://[DB_REDACTED]' },
// Credit card numbers (simple pattern)
{ pattern: /\b\d{4}[\s-]?\d{4}[\s-]?\d{4}[\s-]?\d{4}\b/g, replacement: '[CARD_REDACTED]' },
// SSN pattern
{ pattern: /\b\d{3}[-]?\d{2}[-]?\d{4}\b/g, replacement: '[SSN_REDACTED]' },
// Email addresses
{ pattern: /\b[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Z|a-z]{2,}\b/g, replacement: '[EMAIL_REDACTED]' },
// Phone numbers (various formats)
{ pattern: /\b\+?1?[-.\s]?\(?\d{3}\)?[-.\s]?\d{3}[-.\s]?\d{4}\b/g, replacement: '[PHONE_REDACTED]' },
// IP addresses (IPv4)
{ pattern: /\b\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\b/g, replacement: '[IP_REDACTED]' },
// AWS keys
{ pattern: /AKIA[0-9A-Z]{16}/g, replacement: '[AWS_KEY_REDACTED]' },
// Private keys
{ pattern: /-----BEGIN\s+(?:RSA\s+)?PRIVATE\s+KEY-----[\s\S]*?-----END\s+(?:RSA\s+)?PRIVATE\s+KEY-----/g, replacement: '[PRIVATE_KEY_REDACTED]' },
];
/**
* Keys in metadata that should be completely redacted
*/
const SENSITIVE_KEYS = new Set([
'password',
'passwd',
'pwd',
'secret',
'token',
'apikey',
'api_key',
'apiKey',
'auth',
'authorization',
'credential',
'credentials',
'private',
'privateKey',
'private_key',
'ssn',
'creditcard',
'credit_card',
'cardnumber',
'card_number',
'cvv',
'cvc',
]);
/**
* Sanitize a string by redacting sensitive patterns
*
* @param data - String to sanitize
* @returns Sanitized string with sensitive data redacted
*/
export function sanitizeErrorData(data: string): string {
if (!data || typeof data !== 'string') {
return data;
}
let sanitized = data;
for (const { pattern, replacement } of SENSITIVE_PATTERNS) {
sanitized = sanitized.replace(pattern, replacement);
}
return sanitized;
}
/**
* Sanitize metadata object by redacting sensitive keys and values
*
* @param metadata - Metadata object to sanitize
* @returns Sanitized metadata with sensitive data redacted
*/
export function sanitizeMetadata(
metadata: Record<string, unknown>
): Record<string, unknown> {
if (!metadata || typeof metadata !== 'object') {
return metadata;
}
const sanitized: Record<string, unknown> = {};
for (const [key, value] of Object.entries(metadata)) {
const lowerKey = key.toLowerCase();
// Completely redact sensitive keys
if (SENSITIVE_KEYS.has(lowerKey)) {
sanitized[key] = '[REDACTED]';
continue;
}
// Check for partial matches in key name
if (/password|token|secret|key|auth|credential|private/i.test(key)) {
sanitized[key] = '[REDACTED]';
continue;
}
// Recursively sanitize nested objects
if (value !== null && typeof value === 'object' && !Array.isArray(value)) {
sanitized[key] = sanitizeMetadata(value as Record<string, unknown>);
continue;
}
// Sanitize string values
if (typeof value === 'string') {
sanitized[key] = sanitizeErrorData(value);
continue;
}
// Sanitize arrays
if (Array.isArray(value)) {
sanitized[key] = value.map((item) => {
if (typeof item === 'string') {
return sanitizeErrorData(item);
}
if (item !== null && typeof item === 'object') {
return sanitizeMetadata(item as Record<string, unknown>);
}
return item;
});
continue;
}
// Pass through other values unchanged
sanitized[key] = value;
}
return sanitized;
}
/**
* Sanitize a complete error object
*
* @param error - Error object with message, stack, and metadata
* @returns Sanitized error object
*/
export function sanitizeError<T extends { message?: string; stack?: string; metadata?: Record<string, unknown> }>(
error: T
): T {
return {
...error,
message: error.message ? sanitizeErrorData(error.message) : error.message,
stack: error.stack ? sanitizeErrorData(error.stack) : error.stack,
metadata: error.metadata ? sanitizeMetadata(error.metadata) : error.metadata,
};
}
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