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Spring Security

You're reading from   Spring Security Secure your web applications, RESTful services, and microservice architectures

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Product type Paperback
Published in Nov 2017
Publisher Packt
ISBN-13 9781787129511
Length 542 pages
Edition 3rd Edition
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Authors (3):
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Robert Winch Robert Winch
Author Profile Icon Robert Winch
Robert Winch
Peter Mularien Peter Mularien
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Peter Mularien
Mick Knutson Mick Knutson
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Mick Knutson
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Toc

Table of Contents (19) Chapters Close

Preface 1. Anatomy of an Unsafe Application FREE CHAPTER 2. Getting Started with Spring Security 3. Custom Authentication 4. JDBC-Based Authentication 5. Authentication with Spring Data 6. LDAP Directory Services 7. Remember-Me Services 8. Client Certificate Authentication with TLS 9. Opening up to OAuth 2 10. Single Sign-On with the Central Authentication Service 11. Fine-Grained Access Control 12. Access Control Lists 13. Custom Authorization 14. Session Management 15. Additional Spring Security Features 16. Migration to Spring Security 4.2 17. Microservice Security with OAuth 2 and JSON Web Tokens 18. Additional Reference Material

Trying out the salted passwords

Start up the application and try creating another user with the password user1. Use the H2 console to compare the new user's password, and observe that they are different.

Your code should now look like this: calendar04.05-calendar.

Spring Security now generates a random salt and combines this with the password before hashing our password. It then adds the random salt to the beginning of the password in plaintext, so that passwords can be checked. The stored password can be summarized as follows:

    salt = randomsalt()
hash = hash(salt+originalPassword)
storedPassword = salt + hash

This is the pseudocode for hashing a newly created password.

To authenticate a user, salt and hash can be extracted from the stored password, since both salt and hash are fixed lengths. Then, the extracted hash can be compared against a new hash, computed...

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