Генерация ssh ключа для git windows

About SSH key passphrases

You can access and write data in repositories on GitHub.com using SSH (Secure Shell Protocol). When you connect via SSH, you authenticate using a private key file on your local machine. For more information, see «About SSH.»

When you generate an SSH key, you can add a passphrase to further secure the key. Whenever you use the key, you must enter the passphrase. If your key has a passphrase and you don’t want to enter the passphrase every time you use the key, you can add your key to the SSH agent. The SSH agent manages your SSH keys and remembers your passphrase.

If you don’t already have an SSH key, you must generate a new SSH key to use for authentication. If you’re unsure whether you already have an SSH key, you can check for existing keys. For more information, see «Checking for existing SSH keys.»

If you want to use a hardware security key to authenticate to GitHub, you must generate a new SSH key for your hardware security key. You must connect your hardware security key to your computer when you authenticate with the key pair. For more information, see the OpenSSH 8.2 release notes.

Generating a new SSH key

You can generate a new SSH key on your local machine. After you generate the key, you can add the key to your account on GitHub.com to enable authentication for Git operations over SSH.

1. Open TerminalTerminalGit Bash.

2. Paste the text below, substituting in your GitHub email address.

   $ ssh-keygen -t ed25519 -C "your_email@example.com"

   Note: If you are using a legacy system that doesn’t support the Ed25519 algorithm, use:

   $ ssh-keygen -t rsa -b 4096 -C "your_email@example.com"

   This creates a new SSH key, using the provided email as a label.

   > Generating public/private ALGORITHM key pair.

   When you’re prompted to «Enter a file in which to save the key», you can press Enter to accept the default file location. Please note that if you created SSH keys previously, ssh-keygen may ask you to rewrite another key, in which case we recommend creating a custom-named SSH key. To do so, type the default file location and replace id_ssh_keyname with your custom key name.

   > Enter a file in which to save the key (/Users/YOU/.ssh/id_ALGORITHM: [Press enter]

   > Enter a file in which to save the key (/c/Users/YOU/.ssh/id_ALGORITHM):[Press enter]

   > Enter a file in which to save the key (/home/YOU/.ssh/ALGORITHM):[Press enter]

3. At the prompt, type a secure passphrase. For more information, see «Working with SSH key passphrases.»

   > Enter passphrase (empty for no passphrase): [Type a passphrase]
   > Enter same passphrase again: [Type passphrase again]

Adding your SSH key to the ssh-agent

Before adding a new SSH key to the ssh-agent to manage your keys, you should have checked for existing SSH keys and generated a new SSH key. When adding your SSH key to the agent, use the default macOS ssh-add command, and not an application installed by macports, homebrew, or some other external source.

Generating a new SSH key for a hardware security key

If you are using macOS or Linux, you may need to update your SSH client or install a new SSH client prior to generating a new SSH key. For more information, see «Error: Unknown key type.»

1. Insert your hardware security key into your computer.

2. Open TerminalTerminalGit Bash.

3. Paste the text below, substituting in the email address for your account on GitHub.

   $ ssh-keygen -t ed25519-sk -C "YOUR_EMAIL"

   Note: If the command fails and you receive the error invalid format or feature not supported, you may be using a hardware security key that does not support the Ed25519 algorithm. Enter the following command instead.

   $ ssh-keygen -t ecdsa-sk -C "your_email@example.com"

4. When you are prompted, touch the button on your hardware security key.

5. When you are prompted to «Enter a file in which to save the key,» press Enter to accept the default file location.

   > Enter a file in which to save the key (/Users/YOU/.ssh/id_ed25519_sk): [Press enter]

   > Enter a file in which to save the key (/c/Users/YOU/.ssh/id_ed25519_sk):[Press enter]

   > Enter a file in which to save the key (/home/YOU/.ssh/id_ed25519_sk):[Press enter]

6. When you are prompted to type a passphrase, press Enter.

   > Enter passphrase (empty for no passphrase): [Type a passphrase]
   > Enter same passphrase again: [Type passphrase again]

7. Add the SSH key to your account on GitHub. For more information, see «Adding a new SSH key to your GitHub account.»

4.3 Git на сервере — Генерация открытого SSH ключа

$ cd ~/.ssh
$ ls
authorized_keys2  id_dsa       known_hosts
config            id_dsa.pub

$ ssh-keygen -o
Generating public/private rsa key pair.
Enter file in which to save the key (/home/schacon/.ssh/id_rsa):
Created directory '/home/schacon/.ssh'.
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/schacon/.ssh/id_rsa.
Your public key has been saved in /home/schacon/.ssh/id_rsa.pub.
The key fingerprint is:
d0:82:24:8e:d7:f1:bb:9b:33:53:96:93:49:da:9b:e3 schacon@mylaptop.local

$ cat ~/.ssh/id_rsa.pub
ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEAklOUpkDHrfHY17SbrmTIpNLTGK9Tjom/BWDSU
GPl+nafzlHDTYW7hdI4yZ5ew18JH4JW9jbhUFrviQzM7xlELEVf4h9lFX5QVkbPppSwg0cda3
Pbv7kOdJ/MTyBlWXFCR+HAo3FXRitBqxiX1nKhXpHAZsMciLq8V6RjsNAQwdsdMFvSlVK/7XA
t3FaoJoAsncM1Q9x5+3V0Ww68/eIFmb1zuUFljQJKprrX88XypNDvjYNby6vw/Pb0rwert/En
mZ+AW4OZPnTPI89ZPmVMLuayrD2cE86Z/il8b+gw3r3+1nKatmIkjn2so1d01QraTlMqVSsbx
NrRFi9wrf+M7Q== schacon@mylaptop.local

Инструменты

Git SSH Windows — пошаговое руководство

Дата размещения статьи 08/12/2019 👁26098

A SSH key is considered an access credential for the secure shell (SSH) network protocol. It is an encrypted and authenticated secure network protocol, applied for remote communication between machines operating on an unsecured network.
This snippet will help you to find the kbd class=»highlighted»>SSH key on your PC if it exists, generate a new SSH key and learn how to add it to your ssh-agent or your GitHub/Bitbucket account.

You can do that by following the steps below. Type ls -al ~/.ssh so as to see your ssh keys:

By default, the filename of the public key is one of the following:

  id_ecdsa.pub
  id_ed25519.pub
  id_rsa.pub

If you don’t have an SSH key, you should create it. Now let’s generate a new SSH key step by step.

Type the command below, using your GitHub’s account email:

ssh-keygen -t rsa -b 4096 -C "[your github's email]"

After running this command, you will be offered to set the SSH key path, but we recommend you to use its default value by pressing the «Enter» button.

> Enter a file in which to save the key (/Users/you/.ssh/id_rsa): [Press enter]

After that it will offer you to insert a passphrase to protect your SSH key.

> Enter passphrase (empty for no passphrase): [Type a passphrase]
> Enter same passphrase again: [Type passphrase again]

Now, when you already have an SSH key, you can add it into the ssh-agent.

1. Be sure ssh-agent is enabled:
2. Add your SSH key to the ssh-agent.

   If you changed the default path while generating an SSH key, now you need to mention that path instead of ~/.ssh/id_rsa.

Usually, repositories are private, and the developers are required to write a username and a password to take any actions related to the remote repository. Adding your SSH key to the GitHub/Bitbucket account helps the system to identify you and your are not asked to write your username and password each time.

Open your terminal and type the command below:

Now, it will print the SSH key in the terminal, so you can copy it.

How to Add SSH Key to the GitHub Account

1. Log into your GitHub’s account. In the top right corner of any page, click your profile photo, then click Settings.
2. In the user settings sidebar, click on SSH and GPG keys.
3. Click on the New SSH key button.
4. Type the title and your SSH key, and press the Add SSH key button.

How to Add SSH Key to the Bitbucket Account

1. Log into your Bitbucket’s account. In the left bottom corner of any page, click your profile photo, then click Personal Settings.
2. In the Personal settings sidebar, click on SSH keys.
3. Click on the Add key button.
4. Type the title and your Add key, and press the Add key button.

Now you have added your PC’s SSH key to your GitHub’s/Bitbucket’s account.

SSH keys are an access credential used in SSH protocol (Secure Shell) which is a network protocol that helps to login from one computer to another securely, as well as to manage networks, operating systems, and configurations. If you use Git and want to clone anything from remote repositories, you have to choose one of these two ways: HTTPS or SSH. If you use HTTPS, you have to type your account access every time you communicate with the remote repository, or change your configs and fill your account data (access). Another modern way is to use the SSH authentication method. It is used in many Version Control Systems to have command line access into your servers, etc. SSH key pairs can be used for authentication instead of passwords. Each key pair consists of a private key and a corresponding public key. When you use SSH key for Git, you inform Git that this PC is authenticated for that GitHub account, and it will never ask you about any access again because you have already given it your SSH key.

Welcome to my first official guide on Dev.to. Today I want to explain how you can setup SSH and Git on your Windows 10 computer.

Note: This is not about 100% securing your keys but about how to generate keys for use with GitHub.

Thanks to garethdd for his constructive feedback.

What is SSH?

SSH stands for Secure Shell and is an awesome way to authenticate yourself on remote servers (for example the Github server) without typing in a password everytime.

SSH works via two keys, the Private Key and the Public Key. While the private key should always stay private and safe, the public key can be shared around the internet without any problems.

The private key allows you to get access to servers that have your public key registered, so your access can only be stolen if the attacker somehow gets your Secret Key so keep it safe!

SSH should be preinstalled on new Windows 10 machines.

What is Git?

Git is a free version management tool that helps you to versionize your code and potentially save it on a remote server (for example Github, Gitlab or Bitbucket).

You can install Git from here:
https://git-scm.com/download/win

You can also install Git via chocolatey:

Create a SSH Key

The first step is to generate a new SSH key. Use cmd or Powershell and run the following command:

ssh-keygen -t rsa -b 4096 -C "your_email@example.com"

You can but don’t need to give it a passphrase since you should never share your secret key around but using one will secure your keys. Keep in mind that everybody can have as many private keys as they want.

This generates a new private SSH key with rsa encryption and 4096 bits. It also generates a public key from the secret key which you can share around.

There will be a new folder and files in your Windows user folder.

In general you can create as many keys as you want. The id_rsa key is the default key generated by ssh and will be automatically be used by your ssh-agent if you don’t tell it to use another key.

What is an ssh-agent?

An ssh-agent is the agent process used to actually authenticate yourself with ssh. There are a few out there (PuTTY with Pageant for example) but for this example we’ll use the ssh-agent provided by the native and default Windows 10 ssh-agent.

If you want to you can use PuTTY and Pageant to make your keys even more secure. Read this post on Digital Ocean for more information.

If you want to change the key used by your ssh-agent, you must first start the service. The service will be disabled on Windows 10 by default. Search for Services and open the Services settings and look for the «OpenSSH Authentication Agent» and Activate it:

Now you will be able to access the ssh-agent from your console via ssh-agent.

For this example we’re going to try to load another key called example into our agent and use it instead of the id_rsa key. To do this you can run the following command:

Now you will have both keys available for this session.

Register your SSH Key on Github

The next step is to register your generated SSH key on Github. For that, run the following command:

type C:Usersyour_user_name.sshid_rsa.pub

and copy the output string into your clipboard. Now go to your Github keys settings and add a new SSH key with your public key and save it.

Congratulations! You now are able to get and push code to Github without any password!

Note: There should also be a C:Usersyour_user_name.sshid_rsa file. This is your private key, don’t share this around!

Setup Github in your Shell

Now it’s time to setup Git on your machine. After installing it from the link above, open a new cmd or Powershell window. Now we need to set your public Git name and Git email address. This will always be public when pushing code.

Luckily Github gives you a privatized email address for use. Go to https://github.com/settings/emails and you will find a @users.noreply.github.com email address for your account. Copy this email address.

Next register your name and email in Git:

git config --global user.name "Your Name"
git config --global user.email your_email@users.noreply.github.com

Congratulations! Now all your Commits will be registered as being commited from your Github user.

Signing your GitHub commits (Optional Step)

To sign your commits you first must install the GPG command line tools. After you installed the GPG toolkit, you can run the following command to generate a new gpg key:

This will ask you what kind of key you want. Go for RSA and RSA.

Now you need to enter a bit length. The recommendation is 4096 bits.

After that you can specify a expiration length or if the key should never expire. Pick as you want. Expiring keys are more secure in general because you have to renew them every now and then.

Now enter your personal informations to verifying your identity with your gpg key.

When you’re done you will be asked for a passphrase. Give it a secure passphrase and you will be done with your gpg-key generation.

After that you will be able to find your key in your users .gnupg folder as specified in the success message.

If you want to list your gpg keys, simply run

// short version
gpg --list-secret-keys

// long version
gpg --list-secret-keys --keyid-format LONG

Your GPG key you can share with Github is the key coming after sec rsa4096/ so for example in

/Users/hubot/.gnupg/secring.gpg
------------------------------------
sec   4096R/3AA5C34371567BD2 2016-03-10 [expires: 2017-03-10]
uid                          Hubot 
ssb   4096R/42B317FD4BA89E7A 2016-03-10

the gpg key would be 3AA5C34371567BD2

To get your public key block, simply run

gpg --armor --export YOUR_GPG_KEY

which will output your public GPG Key Block. Copy it and paste it to your GitHub Account here.

From now on your commits will be signed when commited.

Use Git

Now you’re ready to actually use Git. From now you can clone repositories via git clone or push new code to Github. Here is a quick reference:

# Clone a repository to the current directory
git clone [REPOSITORY_CLONE_URL]

# Create a new commit with a message
git commit -m "Your commit message"

# Add files to the commit
git add .
git add ./filename.ext

# Push your commits to Github
git push origin master
git push origin [YOUR_BRANCH_NAME]

# Reset your repo to the last version
git reset --hard

# Create a new branch
git checkout -b [YOUR_BRANCH_NAME]

# Switch branches
git checkout [YOUR_BRANCH_NAME]
git checkout master

# Reset a single file
git checkout ./filename.ext

Conclusion

Thanks for reading this post. I hope it helped you with the setup. If you need help or have questions let me know!