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/* ========================================================================
* 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: Login 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: 5 December 1995
* Last Edited: 30 August 2006
*/
long auth_login_client (authchallenge_t challenger,authrespond_t responder,
char *service,NETMBX *mb,void *stream,
unsigned long *trial,char *user);
char *auth_login_server (authresponse_t responder,int argc,char *argv[]);
AUTHENTICATOR auth_log = {
AU_HIDE, /* hidden */
"LOGIN", /* authenticator name */
NIL, /* always valid */
auth_login_client, /* client method */
auth_login_server, /* server method */
NIL /* next authenticator */
};
#define PWD_USER "User Name"
#define PWD_PWD "Password"
/* 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_login_client (authchallenge_t challenger,authrespond_t responder,
char *service,NETMBX *mb,void *stream,
unsigned long *trial,char *user)
{
char pwd[MAILTMPLEN];
void *challenge;
unsigned long clen;
long ret = NIL;
/* get user name prompt */
if ((challenge = (*challenger) (stream,&clen)) != NULL) {
fs_give ((void **) &challenge);
pwd[0] = NIL; /* prompt user */
mm_login (mb,user,pwd,*trial);
if (!pwd[0]) { /* user requested abort */
(*responder) (stream,NIL,0);
*trial = 0; /* cancel subsequent attempts */
ret = LONGT; /* will get a BAD response back */
}
/* send user name */
else if ((*responder) (stream,user,strlen (user)) &&
(challenge = (*challenger) (stream,&clen))) {
fs_give ((void **) &challenge);
/* send password */
if ((*responder) (stream,pwd,strlen (pwd))) {
if ((challenge = (*challenger) (stream,&clen)) != NULL)
fs_give ((void **) &challenge);
else {
++*trial; /* can try again if necessary */
ret = LONGT; /* check the authentication */
}
}
}
}
memset (pwd,0,MAILTMPLEN); /* erase password */
if (!ret) *trial = 65535; /* don't retry if bad protocol */
return ret;
}
/* Server authenticator
* Accepts: responder function
* argument count
* argument vector
* Returns: authenticated user name or NIL
*/
char *auth_login_server (authresponse_t responder,int argc,char *argv[])
{
char *ret = NIL;
char *user,*pass,*authuser;
if ((user = (*responder) (PWD_USER,sizeof (PWD_USER),NIL)) != NULL) {
if ((pass = (*responder) (PWD_PWD,sizeof (PWD_PWD),NIL)) != NULL) {
/* delimit user from possible admin */
if ((authuser = strchr (user,'*')) != NULL) *authuser++ = '\0';
if (server_login (user,pass,authuser,argc,argv)) ret = myusername ();
fs_give ((void **) &pass);
}
fs_give ((void **) &user);
}
return ret;
}
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