Add work draft of BSD Auth post

1 files changed, 67 insertions, 0 deletions

diff --git a/content/posts/how-bsd-authentication-works/graph.dot b/content/posts/how-bsd-authentication-works/graph.dot
new file mode 100644
index 0000000..a07e3ec
--- /dev/null
+++ b/content/posts/how-bsd-authentication-works/graph.dot
@@ -0,0 +1,67 @@
+digraph G {
+    subgraph cluster_authenticate {
+        label = "authenticate.c"
+        auth_userokay;
+        auth_usercheck;
+        auth_verify;
+    }
+
+    subgraph cluster_auth_subr {
+        label = "auth_subr.c"
+        auth_open;
+        auth_call;
+        auth_close;
+        // auth_setitem;
+        // auth_setdata;
+        // auth_setopts;
+        auth_set[label="auth_set*"];
+        auth_setstate;
+        // _auth_spool;
+    }
+
+    subgraph cluster_login_cap {
+        label = "libc/login_cap.c"
+        login_getclass
+        login_getstyle
+    }
+
+    subgraph cluster_getpwent {
+        label = "libc/getpwent.c"
+        getpwnam_r;
+    }
+
+    subgraph cluster_exec {
+        login[label="login_*"];
+        execve;
+    }
+
+
+    start -> auth_userokay;
+    auth_userokay -> auth_usercheck;
+    auth_usercheck -> getpwnam_r;
+    auth_usercheck -> login_getclass;
+    auth_usercheck -> login_getstyle;
+    // if password given
+    auth_usercheck -> auth_open;
+    // auth_usercheck -> auth_setitem;
+    // auth_usercheck -> auth_setdata;
+    auth_usercheck -> auth_set;
+    // fi
+    auth_usercheck -> auth_verify;
+
+    auth_verify -> auth_setstate;
+    auth_verify -> auth_call;
+
+    auth_call -> execve;
+    // auth_call -> _auth_spool;
+
+    execve -> login;
+    login -> auth_call[label="back channel"];
+    // login -> _auth_spool[label="back channel"];
+
+
+    // auth_usercheck -> { auth_setitem auth_setdata auth_setopts }
+
+    // auth_call -> auth_userokay;
+    auth_userokay -> auth_close;
+}