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- Generating keys using OpenSSL There are two ways of getting private keys into a YubiKey: You can either generate the keys directly on the YubiKey, or generate them outside of the device, and then importing them into the YubiKey.
- The command that you shared generates a public key pair from the existing private key. Openssl rsa -in server.key -pubout -out key.pub.
Applicable Products
- NetScaler
Instructions
Alternatively, you can use different way to pass a private key password to OpenSSL - consult OpenSSL documentation for pass phrase arguments. Then, create an OpenSSH public key which can be added to authorizedkeys file: ssh-keygen -y -f /.ssh/idrsa /.ssh/idrsa.pub.
Note
Openssl Generate Public Key From Private Key West
: First you will need a linux based operating system that supports openssl command to run the following commands.- Extract the key-pair
#openssl pkcs12 -in sample.pfx -nocerts -nodes -out sample.key - Get the Private Key from the key-pair
#openssl rsa -in sample.key -out sample_private.key - Get the Public Key from key pair
#openssl rsa -in sample.key -pubout -out sample_public.key - Need to do some modification to the private key -> to pkcs8 format
#openssl pkcs8 -topk8 -inform PEM -in sample_private.key -outform PEM -nocrypt
Copy the output and save it as sample_private_pkcs8.key - Get those files
public key: sample_public.key
private key: sample_private_pkcs8.key
Openssl Generate Public Key From Private Key West
Lets say you have a private/public key pair that you use to login to your server via SSH and you lose the public key, either it was deleted or corrupt and you don’t want to have to regenerate a new pair what options do you have? In this post I will demonstrate how to regenerate a public key from the corresponding private key that you still have.
Generate public key and store into a file
It is a simple one liner command to generate a public key from a private key, so lets say our private key is named ‘[email protected]’ and we want to generate the public key and name it ‘authorized_keys’. Below is the command to do this.
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