Sn.exe (Strong Name Tool). Public/private key pairs generated with the AT. The following command displays the public key and the token for the public.

  1. Command Line Utility For Generating Key Pairs Download

Generating Langford Pairs in Scala. As I've discussed on the blog before, I've been reading Donald Knuth's series The Art of Computer Programming now for a few years, trying to work through all of the exercises. I've gotten up to volume 4A, which starts out with a discussion of an interesting mathematical puzzle — the generation of Langford. Command Line Utility¶ This cli interface allows a user to: generate and serialize key pairs (of different key sizes) encrypt and serialize given a public key and a plaintext number; decrypt given a private key and the ciphertext; add two encrypted numbers together; add an encrypted number to a plaintext number. Aspera key pairs can be generated by Unix/Linux ssh-keygen utility or by puttigen program, which can be run by command line (Unix/Linux) as well as via user interface. PuTTY format keys (.ppk) will need to be converted to OpenSSH for use with the current versions of ascp.

Overview

The ascp program requires a private/public keys pair for large data transfers. This guide describes how users can generate or convert their keys for use with ascp.

Generating new key

Aspera key pairs can be generated by Unix/Linux ssh-keygen utility or by puttigen program, which can be run by command line (Unix/Linux) as well as via user interface.

PuTTY format keys (.ppk) will need to be converted to OpenSSH for use with the current versions of ascp.

Using command line

ssh-keygen utility for Linux/Unix and OS X users

Generate public and private keys with command: ssh-keygen -f ./private.openssh (leave prompts Key passphrase and Confirm passphrase empty.

This will store a private key in the current working directory with the name private.openssh as well as a public key with the name 'private.openssh.pub'.

Using PuTTYgen software for UNIX

Download the PuTTYgen software for UNIX: http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html .

For questions concerning PuTTY installation on UNIX, please see the README file provided in the downloaded source.

To generate keys in OpenSSH format:
  • For private key use command line: <path-to-puttygen.exe>/puttygen -O private-openssh -t rsa -b 1024 -o private.openssh
  • For public key use command line: <path-to-puttygen.exe>/puttygen private.openssh -O public-openssh -o publicssh.pub
To generate keys in PuTTY format:
  • For private key use command line: <path-to-puttygen.exe>/puttygen -O private -t rsa -b 1024 -o puttyprivate.ppk
  • For public key use command line: <path-to-puttygen.exe>/puttygen puttyprivate.ppk -O public-openssh -o publicssh.pub

To convert a PuTTY format private key to a OpenSSH format private key with puttygen:

<path-to-puttygen.exe>/puttygen <original_key.ppk> -O private-openssh -o <new_key.openssh>

Using PuTTYgen software for Microsoft Windows

Download the PuTTYgen software for Microsoft Windows: http://the.earth.li/~sgtatham/putty/latest/x86/puttygen.exe .

Run puttygen.exe to create an ssh key:

Make sure that SSH-2 RSA Parameter option is selected, and that the Number of bits in a generated key be set to 1024. Then press Generate (moving the mouse to generate a key).

Generating a key will result in something like this:

Click Save Private Key to retain the private key. NOTE - leave Key passphrase and Confirm passphrase empty (otherwise, you will be prompted to enter the passphrase whenever you do an Aspera transaction).

Copy the text from the Public Key for pasting into OpenSSH authorized_keys file text box. The OpenSSH public key must look like the following example. Other formats can't be used as the public key.

ssh-rsa AAAAB3NzaC1yc2EAAAABJQAAAIEAoQNz1WIxVOvdRL9fx ... jVp9nc= rsa-key-20090113

Command Line Utility For Generating Key Pairs

Command Line Utility For Generating Key Pairs Download

Click Export OpenSSH Key in the Coversions menu to retain the private key in OpenSSH format. NOTE - leave Key passphrase and Confirm passphrase empty (otherwise, you will be prompted to enter the passphrase whenever you perform an Aspera transaction).

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