Certificate Request and Response

Certificate Signing Request

In public key infrastructure (PKI) systems, a certificate signing request (also CSR or certification request) is a message sent from an applicant to a certificate authority in order to apply for a digital identity certificate. It usually contains the public key for which the certificate should be issued, identifying information (such as a domain name) and integrity protection (e.g., a digital signature). The most common format for CSRs is the PKCS #10 specification; another is the Signed Public Key and Challenge SPKAC format generated by some web browsers.

Source: Wikipedia

Generate a CSR using OpenSSL

$ sudo apt install openssl [On Debian/Ubuntu]
$ openssl req -new -newkey rsa:2048 -nodes -keyout server.key -out server.csr

Upload Certificate Signing Request

X.509 Certificate

Install a Certificate

TLS/SSL

References

• PKCS #10: Certification Request Syntax Specification Version 1.7
• Internet X.509 Certificate Request Message Format
• PKI Technical Standards
• SSL Certificate Formats
• What’s the difference between X.509 and PKCS#7 Certificate?
• A SSL Certificate File Extension Explanation: PEM, PKCS7, DER, and PKCS#12
• What are the differences between .P7B (PKCS#7) .PFX/.P12 (PKCS#12) .PEM, .DER, .CRT, .CER Certificates?
• Network Security
• Chain of trust
• Service-Level Monitoring of HTTPS Traffic
• SSL Basics: What is a Certificate Signing Request (CSR)?
• Generate CSR
• CSR Decoder And Certificate Decoder
• How to decode a Certificate Signing Request (CSR) file using OpenSSL
• How to Generate a CSR for Nginx (OpenSSL)
• How to Generate a CSR (Certificate Signing Request) in Linux
• x509 Certificate – Asymmetric encryption and Digital Signatures
• How to Use X.509 Certificates and SSL For Secure Communications
• What Is an X.509 Certificate?
• How to install an SSL certificate on IIS10