From 8f2f21b759e9523e08f6ef85881afae88195e492 Mon Sep 17 00:00:00 2001
From: Dante Catalfamo
Date: Sat, 27 Jun 2020 03:33:46 -0400
Subject: More work on auth post

---
 .../posts/how-bsd-authentication-works/index.org   | 49 ++++++++++++----------
 1 file changed, 26 insertions(+), 23 deletions(-)

(limited to 'content/posts/how-bsd-authentication-works')

diff --git a/content/posts/how-bsd-authentication-works/index.org b/content/posts/how-bsd-authentication-works/index.org
index 29a9d62..28ceb2d 100644
--- a/content/posts/how-bsd-authentication-works/index.org
+++ b/content/posts/how-bsd-authentication-works/index.org
@@ -71,29 +71,6 @@ returns a finished auth session of type =auth_session_t=. It closes
 the auth session using =auth_close= and returns the value returned
 from closing.
 
-=auth_usercheck= checks the user name against the passwd db. It also
-checks the login class against the =login.conf= db, along with
-confirming the login styles available.
-
-#+begin_quote
-Validates the checks that the user exists, gets the user's login
-class, verifies the auth type, and that the auth style can be used.
-
-It creates an auth session struct.
-
-If the password is provided it sets the service type to =response=,
-and adds the adds the password to the auth data. Otherwise it
-leaves it empty.
-#+end_quote
-
-From there it calls a couple other functions, constructing and
-filling out an =auth_session_t= struct using the =auth_set*=
-functions from =auth_subr(3)=. It contains things like the user
-name, login class, along with other details required to
-authenticate the user.
-
-# FILL THIS PART OUT MORE!
-
 #+BEGIN_SRC c
 struct auth_session_t {
     char    *name;                 /* name of use being authenticated */
@@ -141,6 +118,31 @@ struct authdata {
 };
 #+END_SRC
 
+#+BEGIN_SRC c
+auth_session_t *auth_usercheck(char *name, char *style, char *type, char *password)
+#+END_SRC
+
+=auth_usercheck= checks the user name against the passwd db. It also
+checks the login class against the =login.conf= db, along with
+confirming the login styles available.
+
+If the password is non-=NULL=, then an =auth_session_t= struct is
+created by calling =auth_open()=, then it calls
+
+#+BEGIN_SRC c
+auth_setitem(as, AUTHV_SERVICE, "response");
+auth_setdata(as, "", 1);
+auth_setdata(as, password, strlen(password) + 1);
+#+END_SRC
+
+setting the service protocol to =response=, adding an empty line to
+the session data, then adding the password as data. If the password is
+=NULL=, it sets the =auth_session_t= pointer to =NULL=. It then passes
+the user name, style, and login class to =auth_verify=, and returns
+the the auth session pointer the call returns.
+
+
+
 
 After that it constructs the path of the authentication module by
 combining =_PATH_AUTHPROG=, which is defined in =login_cap.h= as
@@ -219,6 +221,7 @@ This is the integer returned by
 =auth_userokay=.
 
 # Setting env on auth_close(as)
+# partual rewrite below
 
 The call graph for =auth_userokay= looks something like this:
 
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