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/* ========================================================================
* Copyright 2020 Eduardo Chappa
* 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 *base,
char *service,NETMBX *mb,void *stream, unsigned long port,
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 *base,
char *service,NETMBX *mb,void *stream, unsigned long port,
unsigned long *trial,char *user)
{
void *challenge;
unsigned long clen;
long ret = NIL;
*trial = 65535; /* never retry */
if (base || (challenge = (*challenger) (stream,&clen)) != NULL) {
if(base == NIL) fs_give ((void **) &challenge);
/* send authorization id (empty string OK) */
if ((*responder) (stream,base,strcpy (user,mb->user),strlen(mb->user))) {
if ((challenge = (*challenger) (stream,&clen)) != NULL)
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;
}
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