Is there a Livejournal the way from my server to authenticate the user (through OpenID or OAuth), and then, using the received authorization, write a post in his blog? What is meant is a server-side method, not the client (not by reference to "send to"). Thus it is necessary that the user is not required me to enter his username and password from LJ (and talking about authorization through OpenID or OAuth).
Looking on the LJ website, but there all help so confused that in the end nothing worthwhile is not found. Google too anything interesting is not suggested (only with login and password from LJ).