Draco/Harry "friendship"?

[ratalman]

No: HPFGUIDX 67913

I'm curious about the fact that Draco was interested in 
befriending Harry when they first met on the train in SS.  Draco 
told Harry that he could help him to make friends with the "right" 
sort of people, and then he offered Harry his hand in friendship.  
After Harry rejected that offer, Draco became unrelentingly hostile 
to him.  I assume that Draco knew that Harry was not from a 
pure-blood family, and yet he was willing to be Harry's friend or 
benefactor.  I wonder what Lucius would have thought about a 
friendship between Draco and Harry, should that have ever 
occurred.  I also wonder how much Draco knew about his 
father's involvement with the DE.