Source from upstream; imap-2007f.tar.gz

MD5 2126fd125ea26b73b20f01fcd5940369

src/c-client/auth_ext.c

@@ -0,0 +1,96 @@
+/* ========================================================================
+ * Copyright 1988-2006 University of Washington
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 
+ * ========================================================================
+ */
+
+/*
+ * Program:	EXTERNAL authenticator
+ *
+ * Author:	Mark Crispin
+ *		Networks and Distributed Computing
+ *		Computing & Communications
+ *		University of Washington
+ *		Administration Building, AG-44
+ *		Seattle, WA  98195
+ *		Internet: MRC@CAC.Washington.EDU
+ *
+ * Date:	6 April 2005
+ * Last Edited:	30 August 2006
+ */
+
+long auth_external_client (authchallenge_t challenger,authrespond_t responder,
+			  char *service,NETMBX *mb,void *stream,
+			  unsigned long *trial,char *user);
+char *auth_external_server (authresponse_t responder,int argc,char *argv[]);
+
+AUTHENTICATOR auth_ext = {	/* secure, has full auth, hidden */
+  AU_SECURE | AU_AUTHUSER | AU_HIDE,
+  "EXTERNAL",			/* authenticator name */
+  NIL,				/* always valid */
+  auth_external_client,		/* client method */
+  auth_external_server,		/* server method */
+  NIL				/* next authenticator */
+};
+
+/* Client authenticator
+ * Accepts: challenger function
+ *	   responder function
+ *	   SASL service name
+ *	   parsed network mailbox structure
+ *	   stream argument for functions
+ *	   pointer to current trial count
+ *	   returned user name
+ * Returns: T if success, NIL otherwise, number of trials incremented if retry
+ */
+
+long auth_external_client (authchallenge_t challenger,authrespond_t responder,
+			  char *service,NETMBX *mb,void *stream,
+			  unsigned long *trial,char *user)
+{
+  void *challenge;
+  unsigned long clen;
+  long ret = NIL;
+  *trial = 65535;		/* never retry */
+  if (challenge = (*challenger) (stream,&clen)) {
+    fs_give ((void **) &challenge);
+				/* send authorization id (empty string OK) */
+    if ((*responder) (stream,strcpy (user,mb->user),strlen (mb->user))) {
+      if (challenge = (*challenger) (stream,&clen))
+	fs_give ((void **) &challenge);
+      else ret = LONGT;		/* check the authentication */
+    }
+  }
+  return ret;
+}
+
+
+/* Server authenticator
+ * Accepts: responder function
+ *	    argument count
+ *	    argument vector
+ * Returns: authenticated user name or NIL
+ */
+
+char *auth_external_server (authresponse_t responder,int argc,char *argv[])
+{
+  unsigned long len;
+  char *authid;
+  char *authenid = (char *) mail_parameters (NIL,GET_EXTERNALAUTHID,NIL);
+  char *ret = NIL;
+				/* get authorization identity */
+  if (authenid && (authid = (*responder) ("",0,&len))) {
+				/* note: responders null-terminate */
+    if (*authid ? authserver_login (authid,authenid,argc,argv) :
+	authserver_login (authenid,NIL,argc,argv)) ret = myusername ();
+    fs_give ((void **) &authid);
+  }
+  return ret;
+}