In this post, we will cover how to create RSA private key, RSA public key, DSA private key, DSA public key with OpenSSL. Create RSA Private Key with PEM format RSA private key generation with OpenSSL involves just one step:…
A wildcard certificate is a specific form of the certificate used in TLS/SSL instances. It is a single certificate with a wildcard character (*) in the domain name field. This allows the certificate to secure multiple subdomain names (hosts) pertaining…
On a Linux 8 system with FIPS enabled, connecting to a Linux 6 system fails, ssh -v displays the following message ssh_dispatch_run_fatal: Connection to XXX port 22: invalid argument Solution The simplest solution is to delete file /etc/ssh/moduli on the…
PFX files are digital certificates that contain both the SSL certificate (public keys) and private key. They’re essential for establishing secure connections between two devices. PFX files are usually issued by a certificate authority and contain information about the issuing…
For SSL key values mismatch issue, it means the private key file does not match the certificate. There are two main reasons. Error message:Cannot load SSL private key file. Error: error: 0B080074:x509 certificate routines:X509_check_private_key:key values mismatch. What is SSL certificate…
A wildcard certificate is a specific form of the certificate used in TLS/SSL instances. It is a single certificate with a wildcard character (*) in the domain name field. This allows the certificate to secure multiple subdomain names (hosts) pertaining…
PEM (originally “Privacy Enhanced Mail”) file was initially invented to make e-mail secure. Now it is an Internet security standard. PEM file is the most common format for X.509 certificates, CSRs, and cryptographic keys. What is a PEM file A…
There are two major encoding schemes for X.509 certificates and keys: PEM (Base64 ASCII), and DER (binary). We can’t always tell what kind of file we are working with just from looking at the filename; we may need to open…
The first thing that we need to know is there is no C drive or E drive in Linux. We will see something like /dev/sda, /dev/sdb, /dev/sdc, … etc. instead. The dev is short for device. The sd was short…
A block device is a storage device that moves data in sequences of bytes or bits (blocks). These devices support random access and generally use buffered I Examples include hard disks, CD-ROM drives, and flash drives. A block device can…
