RE: Simulating adopted authority with IFS

Javier,

You said “After change of effective group, it seems that a user without permissions can use IFS objects. But this does not always happen.”

Can you expand on what scenarios the user does not gain authority?

Is the qsysetegid() API failing for select users?

Remember a Group Profile cannot be a member of a Group. For a profile that fails, is that users profile a Group Profile? Check if there is a GID on a failing user profile.

Also note the following statement that is part of Flowchart 6 of the Authority checking process in the security reference manual.

“Note: If the user is signed on as the profile that is the primary group for an object, the user cannot receive authority to the object through the primary group.” (this seems unlikely)

Is auditing active on your system? Look at the Audit Logs to see if any authority failures are being logged.

As for SFTP, remember it is going to look for the user’s private key and known_hosts file in the .ssh directory under the user’s home directory. You can use the following sftp command to tell the system where to locate the files.
sftp -vvv -i /home/user/.ssh/id_rsa -o UserKnownHostsFile=/home/user/.ssh/known_hosts remoteuser@server

Rob W