{"id":17291,"library":"md5-o-matic","title":"MD5-o-matic","description":"md5-o-matic is a JavaScript utility for generating MD5 hashes in Node.js, distinguished by its claim of being fast and having zero module dependencies. The package's current stable version is 0.1.1, which was released over a decade ago, indicating it is no longer actively maintained. While historically valued for its performance and self-contained nature, MD5 as a cryptographic hash function is now considered insecure due to significant vulnerabilities, particularly its susceptibility to collision attacks. It should not be used for security-sensitive applications like password storage or digital signatures. Its utility today is limited to non-cryptographic checksums for verifying data integrity against unintentional corruption or for generating unique identifiers where collision resistance is not a security concern.","status":"abandoned","version":"0.1.1","language":"javascript","source_language":"en","source_url":"git://github.com/trentmillar/md5-o-matic","tags":["javascript","md5","hashing","hash","encrypt","security","fast","md5-o-matic"],"install":[{"cmd":"npm install md5-o-matic","lang":"bash","label":"npm"},{"cmd":"yarn add md5-o-matic","lang":"bash","label":"yarn"},{"cmd":"pnpm add md5-o-matic","lang":"bash","label":"pnpm"}],"dependencies":[],"imports":[{"note":"The package primarily uses CommonJS `require` as it's an older Node.js module. It exports a single function as the module's default export. Named imports (`{ md5omatic }`) are incorrect.","wrong":"const { md5omatic } = require('md5-o-matic');","symbol":"md5omatic","correct":"import md5omatic from 'md5-o-matic';"},{"note":"This is the original and most reliable way to import this package due to its age and CommonJS module format. The function itself is the default export.","symbol":"md5omatic","correct":"const md5omatic = require('md5-o-matic');"}],"quickstart":{"code":"const md5omatic = require('md5-o-matic');\n\nconst testString = 'The quick brown fox jumps over the lazy dog';\nconst emptyString = '';\nconst dataBuffer = Buffer.from('Hello, World!', 'utf8');\n\n// Hash a standard string\nconst hash1 = md5omatic(testString);\nconsole.log(`MD5 for \"${testString}\": ${hash1}`);\n\n// Hash an empty string\nconst hash2 = md5omatic(emptyString);\nconsole.log(`MD5 for empty string: ${hash2}`);\n\n// Hashing binary data (e.g., a Buffer)\n// Note: md5-o-matic might stringify non-string inputs. \n// For robust binary hashing, Node.js's native 'crypto' module is recommended.\ntry {\n  const hash3 = md5omatic(dataBuffer.toString('binary')); // Attempt to make it work, but not ideal\n  console.log(`MD5 for Buffer \"Hello, World!\": ${hash3} (Note: conversion to string)`);\n} catch (e) {\n  console.error(\"md5-o-matic might not directly support Buffer input without conversion.\", e.message);\n}\n\n// Example of how it was benchmarked (from original jsperf idea)\nfunction runBenchmark() {\n  const startTime = process.hrtime.bigint();\n  for (let i = 0; i < 10000; i++) {\n    md5omatic('some string to hash many times for benchmark ' + i);\n  }\n  const endTime = process.hrtime.bigint();\n  const durationMs = Number(endTime - startTime) / 1_000_000;\n  console.log(`Hashed 10,000 strings in ${durationMs.toFixed(2)} ms`);\n}\n\nrunBenchmark();","lang":"javascript","description":"This quickstart demonstrates how to import `md5-o-matic` using CommonJS `require` and compute MD5 hashes for strings. It also includes an example of attempting to hash a Buffer (with a caveat) and a simple benchmark to illustrate its intended use case."},"warnings":[{"fix":"Migrate to modern, secure hashing algorithms like SHA-256 (for integrity checks) or Argon2/bcrypt/scrypt (for password storage) using Node.js's built-in `crypto` module or well-vetted libraries. For file integrity, consider `sha256sum` or similar tools.","message":"MD5 is Cryptographically Broken: The MD5 hash function has critical security vulnerabilities, most notably collision attacks, where two different inputs can produce the same hash output. This means it is unsuitable for any security-sensitive applications, such as password hashing, digital signatures, or verifying software integrity against malicious tampering.","severity":"breaking","affected_versions":"All versions"},{"fix":"Avoid using this package for new projects. For existing projects, evaluate the necessity of MD5 hashing; if a hash is required, consider using Node.js's native `crypto` module (e.g., `crypto.createHash('md5')`) for a maintained implementation, or ideally, migrate to a more secure hash function.","message":"Package is Abandoned and Unmaintained: The `md5-o-matic` package has not been updated since its initial release over a decade ago (v0.1.1 in 2014). This means it receives no security patches, bug fixes, or compatibility updates, posing a potential risk in modern environments.","severity":"deprecated","affected_versions":"All versions"},{"fix":"Install community-maintained types (`@types/md5` for general MD5, though specific to other MD5 libraries, or create a declaration file (`declare module 'md5-o-matic';`) to suppress errors, acknowledging the lack of type safety. Prioritize migrating to a modern, typed alternative.","message":"No Official TypeScript Type Definitions: As an older, unmaintained JavaScript package, `md5-o-matic` does not provide official TypeScript type definitions. This can lead to reduced developer experience and potential type-related errors when used in TypeScript projects.","severity":"gotcha","affected_versions":"All versions"},{"fix":"Benchmark against Node.js's built-in `crypto` module if performance is critical for MD5, and always prefer secure alternatives for new work. Consider `process.hrtime.bigint()` for accurate benchmarking.","message":"Historical Performance Claims May Be Outdated: While `md5-o-matic` was promoted for its speed at the time of its release, modern JavaScript engines and native Node.js `crypto` module implementations (often C++ bindings) or WebAssembly-based hashing libraries can offer superior performance for MD5 and more secure algorithms. Its 'zero dependency' advantage does not necessarily translate to optimal performance today.","severity":"gotcha","affected_versions":"All versions"}],"env_vars":null,"last_verified":"2026-04-22T00:00:00.000Z","next_check":"2026-07-21T00:00:00.000Z","problems":[{"fix":"The `md5-o-matic` package exports a single function directly. Use it like `const md5omatic = require('md5-o-matic'); md5omatic('your string');`. Do not use `new` or destructuring for CommonJS imports.","cause":"Attempting to call `md5omatic` as a constructor (`new md5omatic()`) or incorrect CommonJS `require` leading to an undefined export.","error":"TypeError: md5omatic is not a function"},{"fix":"Ensure the package is installed via npm: `npm install md5-o-matic`. Verify the `require` statement matches the package name exactly: `require('md5-o-matic')`.","cause":"The package `md5-o-matic` is not installed or the import/require path is incorrect.","error":"Error: Cannot find module 'md5-o-matic'"},{"fix":"Confirm the input data for hashing is identical to the source that generated the expected hash. Check for consistent file encodings, line endings (CRLF vs. LF), and any byte order marks (BOMs). Ensure the same string representation or binary buffer is used consistently. If verifying downloads, redownload and re-verify. If verifying data passed between systems, confirm the data is transmitted without alteration.","cause":"The calculated MD5 hash does not match an expected hash, often due to unintentional file corruption, encoding issues, or differences in line endings between systems, even for subtle changes in the input data. This is a normal and expected behavior of cryptographic hash functions.","error":"MD5 hash mismatch when verifying file integrity"}],"ecosystem":"npm","meta_description":null}