Generate Aes Key Command Line

Posted By admin On 17.08.21

Generate Aes Key Command Line Linux
Openssl Command Line Generate Aes Key

Introduction

Generate A Key Pair. To create a key pair using PGP Command Line follow these steps: Open a command shell or DOS prompt. On the command line, enter: pgp -gen-key user ID -key-type key type -bits bits # -passphrase passphrase NOTE: Any information that contains spaces must be contained inside quotation marks. See the example below. Normally, the tool prompts for the file in which to store the key. However, it can also be specified on the command line using the -f option. Ssh-keygen -f /tatu-key-ecdsa -t ecdsa -b 521 Copying the Public Key to the Server. To use public key authentication, the public key must be copied to a server and installed in an authorized. Run the madpwd3 utility to generate the encrypted password. The madpwd3 utility allows for the key and iv to be entered either from a file or directly on the command line. Use the -keyfile and -ivfile options to specify as a file or use the -key and -iv options to enter them at the command prompt. There is no limit on the length of the password.

Cisco IOS® Software Release 12.3(2)T code introduces the functionality that allows the router to encrypt the ISAKMP pre-shared key in secure type 6 format in nonvolatile RAM (NVRAM). The pre-shared key to be encrypted can be configured either as standard, under an ISAKMP key ring, in aggressive mode, or as the group password under an EzVPN server or client setup. This sample configuration details how to set up encryption of both existing and new pre-shared keys.

Prerequisites

Requirements

There are no specific requirements for this document.

Components Used

The information in this document is based on this software version:

Cisco IOS Software Release 12.3(2)T

The information in this document was created from the devices in a specific lab environment. All of the devices used in this document started with a cleared (default) configuration. If your network is live, make sure that you understand the potential impact of any command.

Conventions

Refer to the Cisco Technical Tips Conventions for more information on document conventions.

Configure

This section presents you with the information you can use to configure the features this document describes.

Note: Use the Command Lookup Tool (registered customers only) to obtain more information on the commands used in this section.

These two new commands are introduced in order to enable pre-shared key encryption:

key config-key password-encryption [master key]
password encryption aes

The [master key] is the password/key used to encrypt all other keys in the router configuration with the use of an Advance Encryption Standard (AES) symmetric cipher. The master key is not stored in the router configuration and cannot be seen or obtained in any way while connected to the router.

Once configured, the master key is used to encrypt any existing or new keys in the router configuration. If the [master key] is not specified on the command line, the router prompts the user to enter the key and to re-enter it for verification. If a key already exists, the user is prompted to enter the old key first. Keys are not encrypted until you issue the password encryption aes command.

The master key can be changed (although this should not be necessary unless the key has become compromised in some way) by issuing the key config-key... command again with the new [master-key]. Any existing encrypted keys in the router configuration are re-encrypted with the new key.

You can delete the master key when you issue the no key config-key.... However, this renders all currently configured keys in the router configuration useless (a warning message displays that details this and confirms the master key deletion). Since the master key no longer exists, the type 6 passwords cannot be unencrypted and used by the router.

Note: For security reasons, neither the removal of the master key, nor the removal of the password encryption aes command unencrypts the passwords in the router configuration. Once passwords are encrypted, they are not unencrypted. Existing encrypted keys in the configuration are still able to be unencrypted provided the master key is not removed.

Additionally, in order to see debug-type messages of password encryption functions, use the password logging command in configuration mode.

Configurations

This document uses these configurations on the router:

Encrypt the Existing Pre-shared Key

Add a New Master Key Interactively

Modify the Existing Master Key Interactively

Delete the Master Key

Verify

There is currently no verification procedure available for this configuration.