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Demystifying Cryptography with OpenSSL 3.0

You're reading from  Demystifying Cryptography with OpenSSL 3.0

Product type Book
Published in Oct 2022
Publisher Packt
ISBN-13 9781800560345
Pages 342 pages
Edition 1st Edition
Languages
Concepts
Author (1):
Alexei Khlebnikov Alexei Khlebnikov
Profile icon Alexei Khlebnikov
LinkedIn
Alexei Khlebnikov has more than 20 years of professional experience in IT, where he worked in different roles - software developer, system administrator, DevOps engineer, technical leader, architect and project manager. During those years Alexei worked with many technologies - Security, Artificial Intelligence, Web Development, Embedded, Mobile, and Robotics. Among other companies, Alexei worked in Opera Software on the famous Opera Internet browser. Alexei has always been interested in security. He was one of the maintainers of security-related Opera browser modules, responsible for cryptography, SSL/TLS and integration with OpenSSL. He was also a member of the Security Architects group, responsible for the security of the Opera browser. Now Alexei lives in Oslo, Norway, and works as a senior consultant for Bespoke AS. He is also the leader of the Architects group at his current employer.
See other products by Alexei Khlebnikov

Table of Contents (20) Chapters

Preface 1. Part 1: Introduction
2. Chapter 1: OpenSSL and Other SSL/TLS Libraries 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 19. Other Books You May Enjoy

Preparing certificates for a TLS server connection

To accept a TLS server connection, we will need to generate two keypairs and certificates: the server certificate and the self-signed CA certificate, which signs the server certificate. Why can’t we just generate a self-signed server certificate, a curious reader may ask? Because using a self-signed certificate as a server certificate is considered an error by most TLS clients and libraries, including the OpenSSL library. Another question you may have is: why can’t we reuse certificates from the OS certificate store for our TLS server? Because we don’t possess private keys for those certificates.

As in Chapter 8, X.509 Certificates and PKI, we will use the openssl req and openssl x509 subcommands for keypairs and certificate generation. But, this time, we will use combined generation commands to demonstrate them too.

We have to generate the CA certificate first. This time, we will use a command that combines...

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Authors (1)

Profile icon Alexei Khlebnikov
LinkedIn
Alexei Khlebnikov has more than 20 years of professional experience in IT, where he worked in different roles - software developer, system administrator, DevOps engineer, technical leader, architect and project manager. During those years Alexei worked with many technologies - Security, Artificial Intelligence, Web Development, Embedded, Mobile, and Robotics. Among other companies, Alexei worked in Opera Software on the famous Opera Internet browser. Alexei has always been interested in security. He was one of the maintainers of security-related Opera browser modules, responsible for cryptography, SSL/TLS and integration with OpenSSL. He was also a member of the Security Architects group, responsible for the security of the Opera browser. Now Alexei lives in Oslo, Norway, and works as a senior consultant for Bespoke AS. He is also the leader of the Architects group at his current employer.
Read more
See other products by Alexei Khlebnikov

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