How to Compare bcrypt Hashed Passwords in Node.js скачать в хорошем качестве

How to Compare bcrypt Hashed Passwords in Node.js

A comprehensive guide on comparing bcrypt hashed passwords in Node.js. Understand the pitfalls and how to implement password validation securely! --- This video is based on the question https://stackoverflow.com/q/65920404/ asked by the user 'kp97338' ( https://stackoverflow.com/u/15059300/ ) and on the answer https://stackoverflow.com/a/65920678/ provided by the user 'felixmosh' ( https://stackoverflow.com/u/6539317/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions. Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: how to compare bcrypt hash password Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l... The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license. If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com. --- How to Compare bcrypt Hashed Passwords in Node.js When working with user authentication in web applications, securely storing and validating passwords is a top priority. One of the most popular methods for hashing passwords in JavaScript is bcrypt. However, comparing a user-entered password to a hashed password stored in the database can be tricky if you're not aware of the proper methods to do so. In this post, we'll explore how to accurately compare bcrypt hashed passwords using Node.js. The Problem: Validating Passwords As developers, we often need to validate user passwords against hashed versions stored in a database. The typical approach is to hash the user-entered password and directly compare it to the stored hash. Here’s a common beginner mistake made in Node.js applications: [[See Video to Reveal this Text or Code Snippet]] In this code, someone might assume they are securely comparing the password by hashing it and checking if it matches the value retrieved from the database. However, this approach is flawed. The Solution: Using bcrypt.compare Method bcrypt provides a built-in method specifically designed for comparing a plaintext password against a hashed password, which is the recommended best practice. Here’s how you can implement it correctly: 1. Retrieve the Hashed Password First, ensure that you retrieve the hashed password from the database, making sure only one record is returned: [[See Video to Reveal this Text or Code Snippet]] 2. Validate the Retrieved Result Before comparing the passwords, check if any results were returned from the database: [[See Video to Reveal this Text or Code Snippet]] Key Points to Consider Always use bcrypt.compare: This method checks the plaintext password against the hashed password without you needing to manually hash the user-entered password. Check for Non-empty Results: By checking fromDB.length > 0, you confirm that the database contains a user with the provided email, preventing unnecessary errors. Security Best Practices: Always follow security guidelines, such as using a strong hashing algorithm (like bcrypt) and salting to protect stored passwords. Conclusion When dealing with user passwords, understanding how to securely hash and compare them is essential to building robust applications. By using the bcrypt.compare method, you can ensure that the process is both efficient and secure. Remember to follow best practices in handling user data and authentication to keep your applications safe. By following the guidelines in this post, you should now have a clear understanding of how to correctly compare bcrypt hashed passwords in Node.js. Happy coding!