This private key is converted to a public key by performing an EC point multiplication with the curve's base point. The result is an (x,y) coordinate pair, which constitutes the public key. Finally, RIPEMD160(SHA256(pubkey)), where pubkey is a serialization of those coordinates, is computed, and encoded in base58, together with a checksum. Feb 26, 2018 This article will explain at a high-level Private and Public Key Cryptography used in Bitcoin and it’s unique security feature. We will be looking at how Public Keys are generated, why this is. I'm still new to public key crypto. I'm trying to understand how it is that the private key is generated first in public key crypto? I would have expected the private and public key to be generated at the same time, as they would depend on each other. How public key is generated.
- Github configure machine to use existing ssh key. Ask Question. So u r saying that i have to generate a new key and then add it to github.and i have no other choice.
- Sep 23, 2019 Add SSH Keys in Ubuntu 16.04. The following steps showed the step by step installation guideline. Set up your default identity. From the terminal, enter ssh-keygen at the command line. The command prompts you for a file to save the key in: ssh-keygen It will create two files; one public key file and one private key file. Both file will have your given name. Add Key files in local machine.
ssh_keys_synology_dsm_6
Full Instructions here: https://forum.synology.com/enu/viewtopic.php?t=126166 |
System: Synology DS1815+ running DSM 6 |
Log into Synology web UI as an administrator user |
Enable “User Home” |
Control Panel / User / Advanced, scroll down to “User Home” |
Check “Enable user home service”, select an appropriate Location (i.e. volume1) |
Click “Apply” |
Create user account(s) that should access Synology via SSH (or via rsync over SSH), using the Synology web UI as normal. |
Enable SSH for the Synology server |
Control Panel / Terminal & SNMP |
Check “Enable SSH Service” |
Click “Apply” |
Log into Synology as admin user via SSH |
Launch SSH application (putty, or other) |
Specify IP address (or host name) of Synology |
Provide admin username and password |
Fix the permissions on all home directories |
cd /volume1/homes |
to change to the directory containing home directories |
“volume1” was selected when you enabled “User Home” above |
ls -al |
to show all home directories |
The important thing is that home directories for SSH users MUST be writable ONLY by the user. The web UI creates these wrong. For each home directory, change permissions: |
sudo chmod 755 /volume1/homes/someuser |
Changes permission to full (read/write/execute) for the user, but to read/execute only for the group and for everyone else |
For each user that you want to grant SSH access to, edit their passwd entry to give them sh access |
NOTE that the changes may here may be reverted upon reboot of the Synology. See https://andidittrich.de/2016/03/howto-r .. users.html |
sudo vi /etc/passwd |
move down to the user you want to modify, move to the end of the line |
press “I” to go into insert mode |
backspace over “/sbin/nologin” and replace with “/bin/sh” |
when done editing, press “ESC”, then “qw” (quit, write file) |
if you make a mistake and want to quit without saving, press “ESC”, then “q!” (quit, without saving changes) |
For each user that you want to grant SSH access to, generate SSH keys |
You could do this while logged in as admin, but you would need to manually mess with changing ownership and permissions of files you create here. It is better / easier to log in as each individual user to perform the following. |
Re-launch your SSH application (putty, or other) to open a new session with the Synology |
Log in as the user you want to set up |
Create folder for SSH keys for the user and set permissions |
mkdir ~/.ssh |
creates a hidden .ssh directory to hold the keys |
chmod 0700 ~/.ssh |
sets proper permissions for the folder (full rights to user, no rights to anyone else) |
touch ~/.ssh/authorized_keys |
Creates a new empty file named authorized_keys. This will hold the public keys of remote users that are allowed to log in here as this Synology user. |
chmod 0644 ~/.ssh/authorized_keys |
Set permissions of the new authorized keys file. (read/write to current user, read-only to everyone else) |
ssh-keygen |
Generate public and private keys |
Press “enter” to accept default file location (should be user’s .ssh folder) |
Press “enter” twice to indicate NOT to create passphrase. (The passphrase would prevent the login from working when used by rsync.) |
Will add files id_rsa (private key) and id_rsa.pub (public key) |
These should automatically be created with the correct permission (read/write by user only, i.e. chmod 600). You shouldn’t need to make any changes. |
Configure the Synology’s SSH service to allow login by key |
Go to an SSH session (Either an administrator or an SSH user. You may still have one open.) |
cp /etc/ssh/sshd_config /etc/ssh/sshd_config.bak |
makes a backup copy of the config file, just in case something goes wrong |
sudo vi /etc/ssh/sshd_config |
Uncomment line that says: #PubkeyAuthentication yes |
Uncomment the line that says: #AuthorizedKeyFiles .ssh/authorized_keys |
Make sure that line is uncommented that says: ChallengeResponseAuthentication no |
Optionally, if you want to disable password-based logins, add a line: PasswordAuthentication no |
Save the file and exit the editor |
Restart the Synology’s SSH service |
sudo synoservicectl --restart sshd |
Or use web admin: Control Panel / Terminal & SNMP; uncheck “Enable SSH service”; apply; check “Enable SSH service”; apply |
If there is an error in the config file, the service may not restart. If this is the case: |
Enable telnet (Control Panel / Terminal & SNMP / Terminal) |
Log in to the Synology as an admin user via a Telnet application (telnet, putty, or other) |
Copy the config backup file you made above, and restart the sshd service again. |
sudo cp /etc/ssh/sshd_config.bak /etc/ssh/sshd_config |
sudo synoservicectl --restart sshd |
Create SSH keys for the remote user that will be logging into the Synology (i.e. the FreeNAS user) |
On the remote / client system that will be logging into the Synology, log in as the user that will need to log into the Synology. |
ssh-keygen |
Generate keys as you did on the Synology in #8 above |
The other steps (creating an .ssh folder, setting permissions, etc.) are already done by FreeNAS. When done though, the permissions on the remote folders and files should match what you did on the Synology. |
The authorized_keys file not needed at this time (it is only needed on the server-side of the SSH login), but it doesn’t hurt to create the file for future use. |
Copy the remote/client’s public key to the Synology. This can be done in a number of different ways, but the main thing you need to do is to get the contents of the remote user’s id_rsa.pub file into the Synology user’s authorized_keys file. The entire contents must be on a single line of the authorized_keys file. One way to do this: |
ssh-copy-id -i ~/.ssh/id_rsa.pub synologyIP |
Replace “synologyIP” with the actual IP address of your Synology |
You will be prompted for the Synology username and password that you want the current local user to log into the Synology as. |
From the remote/client SSH session, try logging into the Synology using the new key: |
ssh synologyUser@synologyIP |
Replace synologyUser with the actual Synology user you want to log in as, and replace synologyIP with the actual Synology IP address. |
You should NOT be prompted for a password. |
If the Synology username is the same as the remote/client username, synologyUser@ is optional. |
Authorizing an SSH key for use with SAML single sign-on; Authorizing a personal access token for use with SAML single sign-on; Viewing and managing your active SAML sessions; Connecting to GitHub with SSH. About SSH; Checking for existing SSH keys; Generating a new SSH key and adding it to the ssh-agent; Adding a new SSH key to your GitHub account.
Sign up for freeto join this conversation on GitHub. Already have an account? Sign in to comment
This repository contains scripts for the R&D setup of OpenFlight Compute.
![Generate Generate](/uploads/1/2/6/0/126069853/116088322.png)
Configure Environment
Currently, this is being developed and tested on Azure.
- Launch the latest Cloud Controller
- Login to the controller and authorise cloud CLI tools (
az login
/aws configure
) - Clone the cluster builder repository
- Run the setup (Note: this will create an SSH keypair at /root/.ssh/id_rsa)
- Update the config variables to reflect desired cloud configuration
Create a Cluster
Generating Ssh Key For Github
Cluster Using Default Configuration
- Navigate to builder directory
- Create a cluster, providing the name and public SSH key to use
Cluster Using Alternative Configuration
In some circumstances there are common deployment configurations that make constant management of one config file time-consuming and inflexible. For this reason, multiple configuration files can exist within
configs/
to allow for storage of these deployment details.- Navigate to builder directory
- Create a new config file
- Update variables and configuration to meet your requirements
- Create a cluster, providing the name and public SSH key to use
Cluster Using Password Instead of SSH Key
While less secure, this method of authorising access to a cluster may be required from time to time. In order to switch from key authorisation to password, set the
AUTH
variable to password
in the desired config file.When
AUTH
is set to password
the second argument to the build script will be used as the password instead of being used as an SSH public key.Express VPN is recently launching in 2018. It is effective in is means and functionality. It is effective in is means and functionality. Moreover, this tool has been the winner of the best security award three times based on its performances. May 29, 2018 Express VPN 6.6 Crack with Serial Keys 2018 by kickasscracks editor Published May 29, 2018 Updated November 8, 2018 Express VPN is the best VPN software program that allows its users to hide their identity and browser anonymously. Express vpn key generator 2018 work. May 18, 2019 Express VPN 2019-7.4.0 Crack With Key Generator Full Final Version May 18, 2019 May 18, 2019 Cracked Only Express VPN 2019 Crack is the powerful IP connection tool for the Pc.
Generate Ssh Key Putty
Additional Notes
- If the variable
SSH_PUB_KEY
is present in a config file then it will be used. This value will be overwritten if an SSH key is passed on the command line. - If the variable
PASSWORD
is present in a config file then it will be used. This value will be overwritten if a password is passed on the command line.
Cloud Init
The
build-cluster.sh
script creates a cloud-init string that will be run on all the nodes, the cloud-init config:- Adds the build machine's SSH public key to all nodes (for passwordless remote access, required for running of ansible playbook)
- Sets up configured SSH public key/password access (depending on config)
- Disables the firewall
- Disabled NetworkManager
- Sets the timezone to Europe/London
- Ensures that the cluster domain name is part of the search zone in
/etc/resolv.conf
Versioning
The version release tags align with the tags in the openflight-ansible-playbook tags.