DataDrop is the Apptio Secure File Transfer Protocol (SFTP) server. When using SFTP to DataDrop, you must generate a key pair (private key and corresponding public key). This supports authentication to the provisioned datadrop server. To maintain security, Apptio should not be given the private key.

Create a public/private key pair 

DataDrop uses public/private SSH keys for authentication. In this example, we use PuTTYgen to generate and configure a public/private key pair. Click here to view the PuTTYgen documentation. This application is neither endorsed nor supported by Apptio. 

1. Download and install a key generator like the PuTTY Key Generator (PuTTYgen): https://www.chiark.greenend.org.uk/~sgtatham/putty/latest.html. 
2. Launch the key generator. Set the following parameters: 
   • Type of key to generate - RSA 
   • Number of bits in a generated key - 4096 
3. Click Generate. 
4. In the Key comment box, enter a comment that describes the key's use case. It may be helpful to include the string DataDrop in this comment. 
5. In the Key passphrase box, enter a passphrase. It is recommended you use a strong password and keep the passphrase secret. This passphrase should not be shared with Apptio. 
6. In the Public key for pasting into OpenSSH authorized keys file box, copy the entire text in this box to a text file (scroll to select the entire key). The key begins with ssh-rsa and ends with your comment string. 
7. Click Save public key. 
8. Click Save private key. Do not share the private key or password (this includes not sharing it with Apptio). 
9. Close the key generator. 

Generating keys using iOS, Linux, or Unix 

You can initiate a terminal session to generate keys in iOS, Linux, or Unix. Enter the following: 

cd ~/.ssh 

ssh-keygen -t rsa -b 4096 -f <keyname> -C "<comment>"  

You will be prompted for a passphrase and confirmation. The following two files are generated: 

• keyname - this is the private key 
• keyname.pub - this is the public key - file to be sent to Apptio 

For example: 

~/.ssh$ ssh-keygen -t rsa -b 4096 -f testkey -C "testkey1" 

Generating public/private rsa key pair. 

Enter passphrase (empty for no passphrase): 

Enter same passphrase again: 

Your identification has been saved in testkey. 

Your public key has been saved in testkey.pub. 

The key fingerprint is: 

SHA256:RtgrTu+WeRn7IrU42YLRRYh3yW0ddI1+kPL4ewP9egw testkey1 

The key's randomart image is: 

+---[RSA 4096]----+ 

| . o o oo+o| 

| .oo = + =..| 

| ..oo . = . | 

| . .. . o .| 

| o.S. ... | 

| o.+. o .E. | 

| .o.B = .+.| 

| ..X B ..=| 

| ..= o. .+.| 

+----[SHA256]-----+