All I've seen is that there were weapons commitments made to the Afghan fighters. Most notably Stingers. These weapons did, in fact, turn the tide in the war against the USSR.
That does NOT constitute direct assistance to Bin Laden...and the CIA operatives that I've seen say that while they were running in the same circles...Bin Laden was giving more money to them than we were....and we were definitely not giving any money or support to him directly.
This is why the Taliban support him so...he was more directly involved than the US was in the war against the USSR. They owe him. But Bin Laden turned on the US when we did not leave Saudi after Desert Storm.