#include <RegexUtils.h>

Static Public Member Functions
static bool	validatePattern (const std::string &pattern, std::string &errorMessage)

static bool	matches (const std::string &pattern, const std::string &text)

Static Public Attributes
static constexpr std::size_t	kMaxPatternLength = 128

Detailed Description

Hardening helpers for user-supplied regular expressions.

std::regex is vulnerable to catastrophic backtracking ("ReDoS"). These helpers apply a pragmatic heuristic layer before compiling a pattern: length limit, rejection of clearly pathological constructs, and a compilation check. They never throw on invalid input.

Member Function Documentation

◆ matches()

static bool lintel::RegexUtils::matches	(	const std::string &	pattern,
		const std::string &	text
	)

static

Match text against a user-supplied pattern using the hardened checks. Never throws; returns false for invalid/unsafe patterns.

Parameters

pattern	the pattern to match
text	the text to match against

Returns: true if the pattern is safe and matches

◆ validatePattern()

static bool lintel::RegexUtils::validatePattern	(	const std::string &	pattern,
		std::string &	errorMessage
	)

static

Validate a user-supplied pattern against basic ReDoS heuristics.

Parameters

pattern	the pattern to check
errorMessage	receives a human-readable reason on failure

Returns: true if the pattern is safe to compile

Member Data Documentation

◆ kMaxPatternLength

constexpr std::size_t lintel::RegexUtils::kMaxPatternLength = 128

staticconstexpr

Maximum allowed length of a user-supplied pattern.

The documentation for this class was generated from the following file:

src/include/lintel/core/utils/RegexUtils.h