The s_client command from OpenSSL is a helpful test client for troubleshooting remote SSL or TLS connections. The post strives to walk you through various examples of testing SSL connections with different ciphers, TLS versions, and SSL server certificate analysis. Testing SSL configuration on … [Read more...] about openssl s_client commands and examples
openssl s_time – How to measure SSL performance
This article will demonstrate how to measure SSL and TLS performance using the openssl s_time utility from OpenSSL, the cryptography and SSL/TLS Toolkit. This utility allows you to connect to a remote host with SSL. Note that the connection must be SSL and does not support a plaintext or any other … [Read more...] about openssl s_time – How to measure SSL performance
openssl ec
The openssl ec command and utility can be used to process your EC (Elliptic Curve) keys. This article will walk you through examples on processing EC keys with the openssl ec utility as well as the openssl ecparam utility. You can submit your CSR with its EC key to The SSL Store for an SSL … [Read more...] about openssl ec
What is a Certificate Signing Request (CSR)?
A Certificate Signing Request (CSR) is the request file to be sent to a Certification Authority (CA) when requesting an SSL certificate. The CSR in PKI is created along with the public/private key pair and contains the public key. Examples are provided below on how to generate a CSR, and take note … [Read more...] about What is a Certificate Signing Request (CSR)?
openssl-speed
The openssl-speed utility can be used to measure the efficiency of cryptographic hash algorithms. For this purposes of this exercise, no additional flags or switches were added to the command. Strictly running openssl-speed will attempt a speed test on each supported hash algorithm and output the … [Read more...] about openssl-speed
How to generate a self-signed certificate with Java and BouncyCastle
This post demonstrates how to generate a self-signed certificate with Java and BouncyCastle. There are numerous posts online about how to generate a self-signed certificate using the Java Keytool, so I won’t cover that here. Instead, you may be looking for how to generate a self-signed certificate … [Read more...] about How to generate a self-signed certificate with Java and BouncyCastle
openssl rsa
The openssl rsa command and utility is used to manage and process RSA keys. Use this command to encrypt decrypt, convert between forms of keys and print contents of the RSA keys. Generate an RSA key with openssl See our posts on generating an RSA key with both genpkey and genrsa. genpkey is … [Read more...] about openssl rsa
openssl genrsa – Generate RSA keys with OpenSSL
Use the openssl genrsa command to generate an RSA private key. The generated RSA private key can be customized by specifying the cipher algorithm and key size. Prime numbers are used in generating the RSA private key. During generation the following symbols will be outputted demonstrating the … [Read more...] about openssl genrsa – Generate RSA keys with OpenSSL