One of the most common forms of cryptography today is public-key cryptography helps to communicate two system by encrypting information using the public key and information can be decrypted using private key. These keys are using mainly on login to server securely and also transferring data securely.

• Openssl Generating Private Key Hangs Windows Git Bash 2017
• Openssl Generating Private Key Hangs Windows Git Bash Free
• Openssl Generating Private Key Hangs Windows Git Bash Update

Openssl Generating Private Key Hangs Windows Git Bash 2017

We can generate these private public keys by various ways.

1) By using openssl.

with password encryption

Generate public key:

2) By using ssh keygen

OpenSSL Hanging When Attempting To Generate Key File. Hi All- I'm new to OpenSSL, so I hope that someone out there can help me with this problem. I have been searching mailing lists and googling. May 01, 2018  Being an open-source tool, OpenSSL is available for Windows, Linux, macOS, Solaris, QNX and most of major operating systems. With its core library written in C programming language, OpenSSL commands can be used to perform hundreds of functions ranging from the CSR generation to converting certificate formats. Reasons for importing keys include wanting to make a backup of a private key (generated keys are non-exportable, for security reasons), or if the private key is provided by an external source. This document will guide you through using the OpenSSL command line tool to generate a key pair which you can then import into a YubiKey.

How to Generate & Use Private Keys using OpenSSL's Command Line Tool. These commands generate and use private keys in unencrypted binary (not Base64 “PEM”) PKCS#8 format. The PKCS#8 format is used here because it is the most interoperable format when dealing with software that isn't based on OpenSSL. Oct 09, 2019  PKCS#8 files are self-describing, and PKCS#8 private key files contain the public key, so a single command can output all the public properties for any private key. WARNING: By default OpenSSL's command line tool will output the value of the private key, even when you ask for it to output the public metadata; the -noout parameter suppresses this. Add your SSH private key to the ssh-agent and store your passphrase in the keychain. If you created your key with a different name, or if you are adding an existing key that has a different name, replace idrsa in the command with the name of your private key file. $ ssh-add -K /.ssh/idrsa.

3) using putty-gen for windows.

Download puttyGen from http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html and run it.

You can select one of the key types, SSH-1, SSH-2, and SSH-2 DSA.
SSH-2 is probably better than others but you have to make sure if your system supports SSH-2, if your system ( server) doesnt support it then you better off with SSH-1.

Level of encryption can be set from “Number of bits in a generated key” . Security level can be enhance by using 2048 but again make sure where you are using it and thus follow the recommendation for this value. I prefer 2048 but even with 1024 is much more secure.

Click on generate to create keys. Move your mouse over the empty space to help puttygen to genereate random variables.

Once the key is generated you will see following window.

If you want to login without password ( in case of ssh login) you can put your passphase empty. click on Save Public key and Save private key to save your keys.

When you save private key it will be saved in ppk format which you can use putty to login to your system. Windows 10 generate ssh key.

We can get private key for openSSH by clicking on Conversions->Export OpenSSH key

Openssl Generating Private Key Hangs Windows Git Bash Free

If you want to use ssh to login with these generated key / pair then
copy public key ( mykey.pub) to .ssh/authorized_key.

Openssl Generating Private Key Hangs Windows Git Bash Update

Generating Self sign certificate: