[262] in Kerberos-V5-bugs
Rewritten sn2princ.c function...
tytso@ATHENA.MIT.EDU (tytso@ATHENA.MIT.EDU)
Fri Dec 4 17:28:16 1992
To: Clifford Neuman <bcn@ISI.EDU>
Cc: marc@MIT.EDU, pato@apollo.hp.com, sommerfeld@apollo.hp.com, tytso@MIT.EDU
Subject: Re: krb_get_phost
In-Reply-To: Your message of Thu, 03 Dec 92 14:28:56 -0800.
<9212032228.AA19402@tgo.isi.edu>
Reply-To: Marc Horowitz <marc@MIT.EDU>
X-Usmail: Marc Horowitz, 38 8th Street #7, Cambridge, MA 02141
X-Phone: 617-492-5509
Date: Thu, 03 Dec 92 18:44:05 EST
From: Marc Horowitz <marc@MIT.EDU>
Ok, here's the function as written now for your comments.
Features:
service name, defaults to "host" if NULL
host name, defaults to what gethostname() returns
type, SRV_HST will canonicalize and lowercase, UNKNOWN does
nothing
I also added an error_type. it should be obvious.
Marc
/*
* $Source: /ua/software/src/krb5.src.B2/src/lib/os/sn2princ.c,v $
* $Author: marc $
*
* Copyright 1991 by the Massachusetts Institute of Technology.
* All Rights Reserved.
*
* Export of this software from the United States of America is assumed
* to require a specific license from the United States Government.
* It is the responsibility of any person or organization contemplating
* export to obtain such a license before exporting.
*
* WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
* distribute this software and its documentation for any purpose and
* without fee is hereby granted, provided that the above copyright
* notice appear in all copies and that both that copyright notice and
* this permission notice appear in supporting documentation, and that
* the name of M.I.T. not be used in advertising or publicity pertaining
* to distribution of the software without specific, written prior
* permission. M.I.T. makes no representations about the suitability of
* this software for any purpose. It is provided "as is" without express
* or implied warranty.
*
*
* Convert a hostname and service name to a principal in the "standard"
* form.
*/
#if !defined(lint) && !defined(SABER)
static char rcsid_sn2princ_c[] =
"$Id: sn2princ.c,v 1.1 92/12/03 16:55:53 marc Exp Locker: marc $";
#endif /* !lint & !SABER */
#include <krb5/krb5.h>
#include <krb5/ext-proto.h>
#include <krb5/los-proto.h>
#include <netdb.h>
#include <ctype.h>
#include <sys/types.h>
krb5_error_code
krb5_sname_to_principal(DECLARG(const char *,hostname),
DECLARG(const char *,sname),
DECLARG(krb5_int32,type),
DECLARG(krb5_principal *,ret_princ))
OLDDECLARG(const char *,hostname)
OLDDECLARG(const char *,sname)
OLDDECLARG(krb5_int32,type)
OLDDECLARG(krb5_principal *,ret_princ)
{
struct hostent *hp;
char **hrealms, *remote_host;
krb5_error_code retval;
register char *cp;
char localname[MAXHOSTNAMELEN];
if ((type == KRB5_NT_UNKNOWN) ||
(type == KRB5_NT_SRV_HST)) {
/* convenience hack: if hostname is NULL, use gethostbyname() */
if (! hostname) {
if (gethostname(localname, MAXHOSTNAMELEN))
return errno;
hostname = localname;
}
/* if sname is NULL, use "host" */
if (! sname) {
sname = "host";
}
/* copy the hostname into non-volatile storage */
if (type == KRB5_NT_SRV_HOST) {
if (!(hp = gethostbyname(hostname)))
return KRB5_ERR_BAD_HOSTNAME;
remote_host = strdup(hp->h_name);
} else /* type == KRB5_NT_UNKNOWN */ {
remote_host = strdup(hostname);
}
if (!remote_host)
return ENOMEM;
for (cp = remote_host; *cp; cp++)
if (isupper(*cp))
*cp = tolower(*cp);
if (retval = krb5_get_host_realm(remote_host, &hrealms)) {
free(remote_host);
return retval;
}
if (!hrealms[0]) {
free(remote_host);
xfree(hrealms);
return KRB5_ERR_HOST_REALM_UNKNOWN;
}
retval = krb5_build_principal(ret_princ, strlen(hrealms[0]),
hrealms[0], sname, remote_host,
(char *)0);
krb5_princ_type(*ret_princ) = KRB5_NT_SRV_HST;
free(remote_host);
krb5_free_host_realm(hrealms);
return retval;
} else {
return KRB5_ERR_BAD_NAMETYPE;
}
}
