Generate Rsa Key Pair Cygwin

15.12.2020by

Generate Rsa Key Pair Cygwin Code

Linux‎ > ‎TOOLS‎ > ‎SFTP‎ > ‎

CREATE SFTP SERVER using CYGWIN

This blog is useful for you if :
1. You want to setup SFTP on Windows
2. If you want to restrict user to a directory on SFTP (using openssh)

Some background inforamtion :
What is SFTP read here
What is OpenSSH read here
What is cygwin read here
Content
  • Install SFTP-server, Cygwin with OpenSSH
  • Configure home-directory
  • Configure SSH-server
  • Start the SSH-service
  • Generate SSH-keys
  • Test login to SFTP-server
  • Uninstall the SSH-service
  • Restrict User to a directory
Install SFTP-server, Cygwin with OpenSSH
  1. Download setup.exe from http://www.cygwin.com/ and save the file to 'c:cygwincygwin.install' (you will have to 1. create the directory).
  2. Run setup.exe and follow instructions below:



Configure home-directory
Note: This step is necessary if roaming profiles are used in Windows.
1. Start Cygwin
2. Open 'c:cygwinetcpasswd' with a text editor (Notepad for example)
3. In passwd, change home-dir from '/home' to 'C:Documents and Settings' (example below for user id:
dfc0364).
Change:
dfc0364:unused_by.....-1851:/home/dfc0364:/bin/bash
to:
dfc0364:unused_by.....-1851:/cygdrive/c/Documents and Settings/dfc0364:/bin/bash
1. Close Cygwin
Configure SSH-server
Configure the SSH-server (sshd) in a Cygwin window:
$ ssh-host-config
*** Info: Generating /etc/ssh_host_key
*** Info: Generating /etc/ssh_host_rsa_key
*** Info: Generating /etc/ssh_host_dsa_key
*** Info: Creating default /etc/ssh_config file
*** Info: Creating default /etc/sshd_config file
*** Info: Privilege separation is set to yes by default since OpenSSH 3.3.
*** Info: However, this requires a non-privileged account called 'sshd'.
*** Info: For more info on privilege separation read /usr/share/doc/openssh/README.privsep.
*** Query: Should privilege separation be used? (yes/no) yes
*** Info: Updating /etc/sshd_config file
*** Warning: The following functions require administrator privileges!
*** Query: Do you want to install sshd as a service?
*** Query: (Say 'no' if it is already installed as a service) (yes/no) yes
*** Info: Note that the CYGWIN variable must contain at least 'ntsec'
*** Info: for sshd to be able to change user context without password.
*** Query: Enter the value of CYGWIN for the daemon: [ntsec]
*** Info: The sshd service has been installed under the LocalSystem
*** Info: account (also known as SYSTEM). To start the service now, call
*** Info: `net start sshd' or `cygrunsrv -S sshd'. Otherwise, it
*** Info: will start automatically after the next reboot.
*** Info: Host configuration finished. Have fun!
InstallationGuideCygwinSetup - soi-toolkit - Cygwin setup for SFTP-s.. http://code.google.com/p/soi-
toolkit/wiki/InstallationGuideCygwinSetup
Start the SSH-service
Start the SSH-server (sshd) in a Cygwin window:
$ cygrunsrv --start sshd
Generate SSH-keys
Note: Remember your passphrase, you will have to configure it in your service components security-property-file in order to connect to your
local SFTP-server.
Generate the SSH-keys to use for public-key cryptography in a Cygwin window:
$ ssh-keygen -t dsa
Generating public/private dsa key pair.
Enter file in which to save the key (/cygdrive/c/Documents and Settings/dfc0364/.ssh/id_dsa):
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /cygdrive/c/Documents and Settings/dfc0364/.ssh/id_dsa.
Your public key has been saved in /cygdrive/c/Documents and Settings/dfc0364/.ssh/id_dsa.pub.
The key fingerprint is:
07:5c:3f:f6:8e:b5:91:de:02:5c:c3:c8:3a:04:3f:aa dfc0364@dse31673
The key's randomart image is:
+--[ DSA 1024]----+
. .
. + o o
o + * +
+ = + o
S + o =
. . . * +
E . = .
.

+-----------------+
dfc0364@dse31673 ~
$ cat ~/.ssh/id_dsa.pub >> ~/.ssh/authorized_keys2
Test login to SFTP-server
Test to login to your local SFTP-server in a Cygwin window (example for user id: dfc0364):
$ sftp dfc0364@localhost
Connecting to localhost..
Enter passphrase for key '/cygdrive/c/Documents and Settings/dfc0364/.ssh/id_dsa':
sftp> exit
Uninstall the SSH-service
If you want to uninstall the SSH-service, open up Cygwin and execute commands:
cygrunsrv --stop sshd
cygrunsrv --remove sshd

Restrict User to a directory
Open etc folder in your cygwin installation. Two file need a edit to to implement chroot jail for user.
1. sshd_config
2. passwd
in sshd_config change below conigurtions

# override default of no subsystems
Subsystem sftp internal-sftp
ChrootDirectory /cygdrive/d/inetpub/ftproot
# Example of overriding settings on a per-user basis
Match User administrators
X11Forwarding no
AllowTcpForwarding no
ForceCommand internal-sftp
in passwd file
manually edit root user to change the group id (usually 544) to 0
for example as below :
SvcCOPSSH:unused_by_nt/2000/xp:0:545:U-WINDOWS-AU90FH5SvcCOPSSH,S-1-5-21-2943273595-299576109-709065550-1031:/var/:/bin/false
Restart OPENSSH service and Enjoy !

Generate Rsa Key Pair Cygwin Download

Run it on your local computer to generate a 2048-bit RSA key pair, which is fine for most uses. Ssh-keygen The utility prompts you to select a location for the keys. By default, the keys are stored in the /.ssh directory with the filenames idrsa for the private key and idrsa.pub for the public key. My question is how to create a public key and private key with OpenSSL in windows and how to put the created public key in.crt file and the private one in.pcks8 file in order to use this two keys to sign a SAML assertion in Java. Generate id_rsa key pair aws. Thanks in advance.

Generate Rsa Key Pair Cygwin Mac

  • Idrsa.pub; If you see an existing public and private key pair listed (for example idrsa.pub and idrsa) that you’d like to use, you can skip Step 2 and go straight to Step 3. Step 2: Generate a new SSH key. With your command line tool still open, enter the text shown below. Make sure you substitute in your email address.
  • You’re looking for a pair of files named something like iddsa or idrsa and a matching file with a.pub extension. The.pub file is your public key, and the other file is the corresponding private key.
  • You can use the Cygwin utility to create the public and private keys for SSH logon that you need for accessing IBM.t rsa identifies the type of key to generate.
  • We need to generate some public-private keys. Note that in our case we need PK keys for passwordless authentication, so we didn't password protect rsa private key in the example that follows. Ssh-keygen -t rsa Generating public/private rsa key pair.
  • To start with everthing, first I had to generate RSA key pair since I had to use an external tool which is not natively a part of Windows since I am using Windows as my development machine. For this porpose I could either spin up a Linix VM or, as an easier and less heavy solution, I used Cygwin tool to run OpenSSL commands and generate private.
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