You're reading from Demystifying Cryptography with OpenSSL 3.0 Discover the best techniques to enhance your network security with OpenSSL 3.0

Product type Paperback

Published in Oct 2022

Publisher Packt

ISBN-13 9781800560345

Length 342 pages

Edition 1st Edition

Languages

Tools

Wireshark

Concepts

Cryptography

Author (1):

Alexei Khlebnikov

View More author details

Table of Contents (20) Chapters

Preface

1. Part 1: Introduction

2. Chapter 1: OpenSSL and Other SSL/TLS Libraries FREE CHAPTER

3. Part 2: Symmetric Cryptography

4. Chapter 2: Symmetric Encryption and Decryption

5. Chapter 3: Message Digests

6. Chapter 4: MAC and HMAC

7. Chapter 5: Derivation of an Encryption Key from a Password

8. Part 3: Asymmetric Cryptography and Certificates

9. Chapter 6: Asymmetric Encryption and Decryption

10. Chapter 7: Digital Signatures and Their Verification

11. Chapter 8: X.509 Certificates and PKI

12. Part 4: TLS Connections and Secure Communication

13. Chapter 9: Establishing TLS Connections and Sending Data over Them

14. Chapter 10: Using X.509 Certificates in TLS

15. Chapter 11: Special Usages of TLS

16. Part 5: Running a Mini-CA

17. Chapter 12: Running a Mini-CA

18. Index

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Using TLS client certificates

In this section, we will learn how to use TLS client certificates: generate them, package them into Public Key Cryptography Standards #12 (PKCS #12) containers, request them from TLS servers, and supply them to TLS clients.

Generating TLS client certificates

Apart from a TLS server, a TLS client can also provide a certificate on a TLS connection. However, according to the TLS protocol, the TLS client does not send its certificate by default, even if the client has it. The TLS client only sends its certificate if the TLS server requests it.

Another peculiarity of TLS client certificates is that a client certificate is often stored together with its certificate private key (or rather a key pair) in the PKCS #12 format. PKCS #12 is a file format that can store several cryptographic objects, such as X.509 certificates and key pairs. These stored objects can be encrypted using a symmetric cipher and authenticated using a Hash-based Message Authentication...