Thanks Mark and Allan!

-----Original Message-----
From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf 
Of Mark Post
Sent: Wednesday, March 01, 2017 2:41 PM
To: [email protected]
Subject: Re: RACF and public keys

>>> On 3/1/2017 at 02:04 PM, Tracy Adams <[email protected]> wrote: 
> I have a vendor that sent me a "public" key so they can SFTP into our 
> mainframe from a Linux box without have to supply the RACF password.  
> Yes they can sign in with a password and all works fine.  I am new to 
> RACF and loading keys and the whole SFTP / ssh thing so bear with me!
> 
> When I look at the key provided it starts off with this "ssh-rsa 
> AAAAB3NzaC1yc2EAAAABI"....  The doc I have found from Dovetail for 
> Co:z indicates to get the .pub file into a MVS dataset in "text" 
> format then do a RACDCERT ADD command and then point to the RACF 
> keyring in $HOME/.ssh/authorized_keys.  The RACDCERT command fails 
> indicating "The input data set does not contain a valid certificate." 
> And the DEBUG option provides no additional information.
> 
> I am thinking I must have done something wrong getting the file from 
> Windows email to the mainframe...  I simply used SFTP to move it from 
> c:\temp and I have tried both ASCII (looks good) and BINARY (looks binary).
> 
> Is the .pub file simple in the wrong format for RACF and needs to be 
> converted?

I'm pretty sure the public key they provided you was not intended to be used in 
conjunction with RACF (or any other ESM).  That looks like a "plain old ssh" 
public key.

If you don't mind them accessing your system in this way (I have severe doubts 
about that), just put the key as-is into the target userid's 
.ssh/authorized_keys file and have them give it a try.


Mark Post

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