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Node Cookbook: Second Edition

You're reading from   Node Cookbook: Second Edition Transferring your JavaScript skills to server-side programming is simplified with this comprehensive cookbook. Each chapter focuses on a different aspect of Node, featuring recipes supported with lots of illustrations, tips, and hints.

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Product type Paperback
Published in Apr 2014
Publisher Packt
ISBN-13 9781783280438
Length 378 pages
Edition Edition
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Author (1):
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David Mark Clements David Mark Clements
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David Mark Clements
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Table of Contents (18) Chapters Close

Node Cookbook Second Edition
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
1. Making a Web Server FREE CHAPTER 2. Exploring the HTTP Object 3. Working with Data Serialization 4. Interfacing with Databases 5. Employing Streams 6. Going Real Time 7. Accelerating Development with Express 8. Implementing Security, Encryption, and Authentication 9. Integrating Network Paradigms 10. Writing Your Own Node Modules 11. Taking It Live Index

Hashing passwords


Effective encryption is a fundamental part of online security. Node provides the crypto module that can be used to generate our own MD5 or SHA1 hashes for user passwords. Cryptographic hashes such as MD5 and SHA1 are known as message digests. Once the input data has been digested (encrypted), it cannot be put back into its original form (of course, if we know the original password, we can regenerate the hash and compare it to our stored hash).

We can use hashes to encrypt a user's password before we store them. If our stored passwords were ever stolen by an attacker, they cannot be used to log in because the attacker will not have the actual plain text passwords. However, since a hash algorithm always produces the same result, it could be possible for an attacker to crack a hash by matching it against hashes generated from the password dictionary (see the There's more... section for ways to mitigate this).

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