/**
 * Input Validation Utilities
 *
 * General input sanitization and pattern matching.
 *
 * Security Features:
 * - RegExp injection prevention (SMI-722)
 * - Input sanitization
 * - Pattern validation
 */
/**
 * Sanitize input string for safe use in various contexts
 *
 * Removes or escapes potentially dangerous characters.
 *
 * @param input - Input string to sanitize
 * @param options - Sanitization options
 * @returns Sanitized string
 *
 * @example
 * ```typescript
 * sanitizeInput('<script>alert(1)</script>')  // Returns: '&lt;script&gt;alert(1)&lt;/script&gt;'
 * sanitizeInput('../../etc/passwd')           // Returns: 'etc/passwd'
 * ```
 */
export declare function sanitizeInput(input: string, options?: {
    /** Remove path traversal sequences like '../' (default: true) */
    removePathTraversal?: boolean;
    /** HTML-escape special characters (default: true) */
    escapeHtml?: boolean;
    /** Remove null bytes (default: true) */
    removeNullBytes?: boolean;
}): string;
/**
 * Safely test a string against a pattern, preventing RegExp injection (SMI-722)
 *
 * Tries exact match, prefix match, and regex match (with error handling).
 * Falls back to includes check if regex is invalid.
 *
 * @param value - Value to test
 * @param pattern - Pattern to match (string or regex)
 * @returns True if value matches pattern
 *
 * @example
 * ```typescript
 * safePatternMatch('node_modules', 'node_modules')  // true (exact)
 * safePatternMatch('node_modules/pkg', 'node_')     // true (prefix)
 * safePatternMatch('test.js', '\\.js$')             // true (regex)
 * safePatternMatch('test.js', '(evil')              // false (invalid regex, falls back)
 * ```
 */
export declare function safePatternMatch(value: string, pattern: string): boolean;
/**
 * Validate that patterns array is safe to use
 *
 * Checks for potentially dangerous regex patterns that could cause ReDoS.
 *
 * @param patterns - Array of patterns to validate
 * @returns Array of validation warnings (empty if all patterns are safe)
 *
 * @example
 * ```typescript
 * validatePatterns(['node_modules', '\\.js$'])  // []
 * validatePatterns(['(a+)+b'])                  // ['Pattern may cause ReDoS: (a+)+b']
 * ```
 */
export declare function validatePatterns(patterns: string[]): string[];
//# sourceMappingURL=input-validators.d.ts.map