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/*
** Copyright 1998 - 2000 Double Precision, Inc. See COPYING for
** distribution information.
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <pwd.h>
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#include "auth.h"
#include "authsasl.h"
#include "authmod.h"
#include "authstaticlist.h"
#include "debug.h"
#include "userdb/userdb.h"
#include "../libhmac/hmac.h"
#include "cramlib.h"
static const char rcsid[]="$Id: authcram.c,v 1.17 2004/04/18 15:54:38 mrsam Exp $";
extern void auth_userdb_cleanup();
char *auth_cram(const char *service, const char *authtype, char *authdata,
int issession,
void (*callback_func)(struct authinfo *, void *), void *callback_arg)
{
char *u;
char *udbs;
char *passwords;
char *services;
struct userdbs *udb;
char *challenge, *response;
char *user;
struct hmac_hashinfo *hmacptr;
if (auth_get_cram(authtype, authdata, &hmacptr,
&user, &challenge, &response))
return (0);
userdb_set_debug(auth_debug_login_level);
userdb_init(USERDB ".dat");
if ( (u=userdb(user)) == 0)
{
userdb_close();
errno=EPERM;
return (0);
}
if ( (udbs=userdbshadow(USERDB "shadow.dat", user)) == 0)
{
free(u);
userdb_close();
errno=EPERM;
return (0);
}
if ((services=malloc(strlen(service)+strlen(hmacptr->hh_name)
+sizeof("-hmac-pw"))) == 0)
{
free(udbs);
free(u);
userdb_close();
errno=ENOSPC;
return (0);
}
strcat(strcat(strcat(strcpy(services, service), "-hmac-"),
hmacptr->hh_name), "pw");
passwords=userdb_gets(udbs, services);
if (passwords == 0)
{
strcat(strcat(strcpy(services, "hmac-"),
hmacptr->hh_name), "pw");
passwords=userdb_gets(udbs, services);
}
if (passwords == 0)
dprintf("authcram: no %s-%s or %s value found",
service, services, services);
free(services);
if (passwords == 0)
{
errno=EPERM;
free(udbs);
free(u);
userdb_close();
return (0);
}
if (auth_verify_cram(hmacptr, challenge, response, passwords))
{
free(passwords);
errno=EPERM; /* other modules can do cram too */
free(udbs);
free(u);
userdb_close();
return (0);
}
free(passwords);
free(udbs);
if ((udb=userdb_creates(u)) == 0)
{
free(u);
userdb_close();
errno=EACCES;
return (0);
}
if (callback_func == 0)
authsuccess(udb->udb_dir, 0, &udb->udb_uid, &udb->udb_gid,
user, udb->udb_gecos);
else
{
struct authinfo aa;
memset(&aa, 0, sizeof(aa));
/*aa.sysusername=user;*/
aa.sysuserid= &udb->udb_uid;
aa.sysgroupid= udb->udb_gid;
aa.homedir=udb->udb_dir;
aa.address=user;
aa.maildir=udb->udb_mailbox;
aa.options=udb->udb_options;
(*callback_func)(&aa, callback_arg);
}
free(u);
userdb_close();
if (callback_func == 0)
putenv("MAILDIR=");
if (callback_func == 0 && udb->udb_mailbox && *udb->udb_mailbox)
{
char *p=malloc(sizeof("MAILDIR=")+strlen(udb->udb_mailbox));
static char *prevp=0;
if (!p)
{
userdb_frees(udb);
perror("malloc");
authexit(1);
}
strcat(strcpy(p, "MAILDIR="), udb->udb_mailbox);
putenv(p);
if (prevp) free(prevp);
prevp=p;
}
userdb_frees(udb);
if ((u=strdup(user)) == 0)
{
perror("malloc");
authexit(1);
}
return (u);
}
extern int auth_cram_pre(const char *userid, const char *service,
int (*callback)(struct authinfo *, void *),
void *arg);
struct authstaticinfo authcram_info={
"authcram",
auth_cram,
auth_cram_pre,
auth_userdb_cleanup,
NULL,
NULL};
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