Linux Command Generate Rsa Key

  

Learn about Secure Shell Access (SSH), private and public keys, SCP, and all other topics related to the ssh command in our beginner's tutorial. Introduction; Introduction to SSH, how it's better than telnet and basic ssh commands. SSH Keys: RSA and DSA; Learn about SSH public and private keys, along with the most widely used key types - RSA. The following command creates an SSH key pair using RSA encryption and a bit length of 4096: ssh-keygen -m PEM -t rsa -b 4096 If you use the Azure CLI to create your VM with the az vm create command, you can optionally generate SSH public and private key files using the -generate-ssh-keys option.

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With a secure shell (SSH) key pair, you can create virtual machines (VMs) in Azure that use SSH keys for authentication, eliminating the need for passwords to sign in. This article shows you how to quickly generate and use an SSH public-private key file pair for Linux VMs. You can complete these steps with the Azure Cloud Shell, a macOS or Linux host, the Windows Subsystem for Linux, and other tools that support OpenSSH.

Note

VMs created using SSH keys are by default configured with passwords disabled, which greatly increases the difficulty of brute-force guessing attacks.

For more background and examples, see Detailed steps to create SSH key pairs.

For additional ways to generate and use SSH keys on a Windows computer, see How to use SSH keys with Windows on Azure.

Supported SSH key formats

Azure currently supports SSH protocol 2 (SSH-2) RSA public-private key pairs with a minimum length of 2048 bits. Other key formats such as ED25519 and ECDSA are not supported.

Create an SSH key pair

Use the ssh-keygen command to generate SSH public and private key files. By default, these files are created in the ~/.ssh directory. You can specify a different location, and an optional password (passphrase) to access the private key file. If an SSH key pair with the same name exists in the given location, those files are overwritten.

The following command creates an SSH key pair using RSA encryption and a bit length of 4096: In ssl tls who generates the session key.

If you use the Azure CLI to create your VM with the az vm create command, you can optionally generate SSH public and private key files using the --generate-ssh-keys option. The key files are stored in the ~/.ssh directory unless specified otherwise with the --ssh-dest-key-path option. The --generate-ssh-keys option will not overwrite existing key files, instead returning an error. In the following command, replace VMname and RGname with your own values:

Provide an SSH public key when deploying a VM

To create a Linux VM that uses SSH keys for authentication, specify your SSH public key when creating the VM using the Azure portal, Azure CLI, Azure Resource Manager templates, or other methods:

If you're not familiar with the format of an SSH public key, you can display your public key with the following cat command, replacing ~/.ssh/id_rsa.pub with the path and filename of your own public key file if needed:

A typical public key value looks like this example:

If you copy and paste the contents of the public key file to use in the Azure portal or a Resource Manager template, make sure you don't copy any trailing whitespace. To copy a public key in macOS, you can pipe the public key file to pbcopy. Similarly in Linux, you can pipe the public key file to programs such as xclip.

The public key that you place on your Linux VM in Azure is by default stored in ~/.ssh/id_rsa.pub, unless you specified a different location when you created the key pair. To use the Azure CLI 2.0 to create your VM with an existing public key, specify the value and optionally the location of this public key using the az vm create command with the --ssh-key-values option. In the following command, replace VMname, RGname, and keyFile with your own values:

If you want to use multiple SSH keys with your VM, you can enter them in a space-separated list, like this --ssh-key-values sshkey-desktop.pub sshkey-laptop.pub.

SSH into your VM

With the public key deployed on your Azure VM, and the private key on your local system, SSH into your VM using the IP address or DNS name of your VM. In the following command, replace azureuser and myvm.westus.cloudapp.azure.com with the administrator user name and the fully qualified domain name (or IP address):

If you specified a passphrase when you created your key pair, enter that passphrase when prompted during the login process. The VM is added to your ~/.ssh/known_hosts file, and you won't be asked to connect again until either the public key on your Azure VM changes or the server name is removed from ~/.ssh/known_hosts.

If the VM is using the just-in-time access policy, you need to request access before you can connect to the VM. For more information about the just-in-time policy, see Manage virtual machine access using the just in time policy.

Next steps

  • For more information on working with SSH key pairs, see Detailed steps to create and manage SSH key pairs.

  • If you have difficulties with SSH connections to Azure VMs, see Troubleshoot SSH connections to an Azure Linux VM.

You will have to generate a private and a public encryption key in order to securely send the order information to FastSpring.

There are two ways on how to generate these keys. The easy way or the long way. The easy way is only possible, if your server is supporting openssl functionalities needed for encryption key generation. These openssl functionalities will be detected by the plugin and so, depending on your server, you will either see the “Generate private and public key” button in the plugin settings page or you wont. If you see the button, then you will be able to use the easy way, if you don’t then please look at the instructions for the long way.

Easy way

  1. click on the “Generate private and public key” button in the plugins settings
  2. if the key generation was successful, dismiss the alert message and download the public-key.pem file, by clicking on the “Download private and public key” link
  3. save the plugin settings
  4. login to your FastSpring dashboard and navigate to Integrations » Store Builder Library. Upload the public-key.pem file to the Public Certificate option.

That’s it! 🙂

Long way

The private and public keys will have to be generated on your computer, so let’s look at how to generate them.

Generate the private/public keys

The generation of these private/public keys differ, depending on which computer operating system you are using. Please follow the instructions for the OS your computer is using.

macOS and Linux

On macOS and on Linux, you should open the terminal program and execute the commands displayed below:

Create a 2048-bit RSA private key. Don’t share this key with anyone, use it only in the EDD FastSpring plugin settings. This key will be used to encrypt the orders. Use this command to generate the privatekey.pem file which will contain your private key. The file will be created in the position, that the terminal is currently located in (usually your home directory).

openssl genrsa -out privatekey.pem 2048

Create a 2048-bit RSA public key. Only share this key with FastSpring. FastSpring will use your public key PEM file publiccert.pem to decrypt the orders. The file will be created in the position, that the terminal is currently located in (usually your home directory). After you run this command a few short questions will be presented to you, which you can skip, by hitting “enter” key for each of them.

openssl req -new -key privatekey.pem -x509 -days 3650 -out publiccert.pem

Now that you have generated these keys, you have to configure the EDD FastSpring plugin and the FastSpring Dashboard, so look at these instructions in the sections below.

Windows

For generation of these private/public keys your computer needs OpenSSL. Windows does not have that installed by default, so we will have to do that ourselves.

  1. Go to this website: https://slproweb.com/products/Win32OpenSSL.html
  2. In the “Download Win32 OpenSSL” section download the latest appropriate “Light” version of the OpenSSL installer. By “appropriate” I mean the version of Windows you are using (32bit or 64bit). I’m using the 64-bit Windows, so at the time of writing this, the latest version to download is “Win64 OpenSSL v1.1.0f Light”.
  3. Install the downloaded installer file as you would any other windows application (leave the default installation path, because it will be needed later on). In the last step, you can uncheck the donation option and click on “Finish”.

So, the OpenSSL is now installed on your Windows computer and we can generate the private and public keys.

Click on your Windows start button and search for “Command Prompt” (cmd), right click on the “Command Prompt” and choose to “Run as administrator”. Click on “yes”, when the window for the administration conformation pops up.

Copy and paste this command into the cmd and hit enter (this will position the cmd location to your desktop, where we will generate the private/public keys):

cd %userprofile%Desktop

Download battlefield 4 beta key generator. Depending on which version of Windows you have and therefore which version of OpenSSL you installed, you will have to use a specific path to the OpenSSL executable.

By default the paths are:

  • If you installed the win32 version, the path will be:
    C:OpenSSL-Win32binopenssl.exe
  • If you installed the win64 version, the path will be:
    C:OpenSSL-Win64binopenssl.exe

I’m using the win64 version, so I’ll use that path in the example, if you are using the win32, then just change the “64” in the path to “32”.

Create a 2048-bit RSA private key. Don’t share this key with anyone, use it only in the EDD FastSpring plugin settings. This key will be used to encrypt the orders. Use this command to generate the privatekey.pem file which will contain your private key.

Generate Rsa Key On Linux

C:OpenSSL-Win64binopenssl.exe genrsa -out privatekey.pem 2048

Create a 2048-bit RSA public key. Only share this key with FastSpring. FastSpring will use your public key PEM file publiccert.pem to decrypt the orders. After you run this command a few short questions will be presented to you, which you can skip, by hitting “enter” key for each of them.

C:OpenSSL-Win64binopenssl.exe req -new -key privatekey.pem -x509 -days 3650 -out publiccert.pem

Now that you have generated these keys, you have to configure the EDD FastSpring plugin and the FastSpring Dashboard, so look at these instructions in the sections below.

Linux Generate Rsa Key

EDD FastSpring settings

Open the privatekey.pem file you generated earlier with a text editor (right-click to the file and choose to open with any text editor like Sublime Text or native text editor of your OS). Copy the content of this file.

Go to your WordPress admin dashboard and navigate to the EDD FastSpring plugin settings (Downloads » Settings » Payment Gateways » FastSpring).

Paste the private key content into the Private encryption key setting. Save the settings.

Generate Rsa Key Pair

FastSpring dashboard configuration

Login to your FastSpring dashboard and navigate to Integrations » Store Builder Library. Upload the publiccert.pem file to the Public Certificate option.

Linux Command Generate Rsa Key On Cisco Router

If you have any issues with generating these keys or questions, you can always contact our support and we will help you out 🙂