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/* $OpenBSD: get_in_tkt.c,v 1.10 1998/07/07 19:06:49 art Exp $ */
/* $KTH: get_in_tkt.c,v 1.19 1997/10/03 21:51:42 joda Exp $ */
/*
* This source code is no longer held under any constraint of USA
* `cryptographic laws' since it was exported legally. The cryptographic
* functions were removed from the code and a "Bones" distribution was
* made. A Commodity Jurisdiction Request #012-94 was filed with the
* USA State Department, who handed it to the Commerce department. The
* code was determined to fall under General License GTDA under ECCN 5D96G,
* and hence exportable. The cryptographic interfaces were re-added by Eric
* Young, and then KTH proceeded to maintain the code in the free world.
*
*/
/*
* Copyright (C) 1989 by the Massachusetts Institute of Technology
*
* 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.
*
*/
#include "krb_locl.h"
/*
* This file contains three routines: passwd_to_key() and
* passwd_to_afskey() converts a password into a DES key, using the
* normal strinttokey and the AFS one, respectively, and
* krb_get_pw_in_tkt() gets an initial ticket for a user.
*/
/*
* passwd_to_key() and passwd_to_afskey: given a password, return a DES key.
*/
int
passwd_to_key(char *user, char *instance, char *realm, void *passwd,
des_cblock *key)
{
#ifndef NOENCRYPTION
des_string_to_key((char *)passwd, key);
#endif
return 0;
}
int
passwd_to_5key(char *user, char *instance, char *realm, void *passwd,
des_cblock *key)
{
char *p;
size_t len;
len = k_mconcat (&p, 512, passwd, realm, user, instance, NULL);
if(len == 0)
return -1;
des_string_to_key(p, key);
memset(p, 0, len);
free(p);
p = NULL;
return 0;
}
int
passwd_to_afskey(char *user, char *instance, char *realm, void *passwd,
des_cblock *key)
{
#ifndef NOENCRYPTION
afs_string_to_key((char *)passwd, realm, key);
#endif
return (0);
}
/*
* krb_get_pw_in_tkt() takes the name of the server for which the initial
* ticket is to be obtained, the name of the principal the ticket is
* for, the desired lifetime of the ticket, and the user's password.
* It passes its arguments on to krb_get_in_tkt(), which contacts
* Kerberos to get the ticket, decrypts it using the password provided,
* and stores it away for future use.
*
* krb_get_pw_in_tkt() passes two additional arguments to krb_get_in_tkt():
* the name of a routine (passwd_to_key()) to be used to get the
* password in case the "password" argument is null and NULL for the
* decryption procedure indicating that krb_get_in_tkt should use the
* default method of decrypting the response from the KDC.
*
* The result of the call to krb_get_in_tkt() is returned.
*/
int
krb_get_pw_in_tkt2(char *user, char *instance, char *realm, char *service,
char *sinstance, int life, char *password, des_cblock *key)
{
char pword[100]; /* storage for the password */
int code;
/* Only request password once! */
if (password == NULL) {
if (des_read_pw_string(pword, sizeof(pword)-1, "Password: ", 0)){
memset(pword, 0, sizeof(pword));
return INTK_BADPW;
}
password = pword;
}
{
KTEXT_ST as_rep;
CREDENTIALS cred;
int ret = 0;
key_proc_t key_procs[] = { passwd_to_key, passwd_to_afskey,
passwd_to_5key, NULL };
key_proc_t *kp;
code = krb_mk_as_req(user, instance, realm,
service, sinstance, life, &as_rep);
if(code)
return code;
for(kp = key_procs; *kp; kp++){
KTEXT_ST tmp;
memcpy(&tmp, &as_rep, sizeof(as_rep));
code = krb_decode_as_rep(user, instance, realm, service, sinstance,
*kp, NULL, password, &tmp, &cred);
if(code == 0){
if(key)
(**kp)(user, instance, realm, password, key);
break;
}
if(code != INTK_BADPW)
ret = code; /* this is probably a better code than
what code gets after this loop */
}
if(code)
return ret ? ret : code;
code = tf_setup(&cred, user, instance);
}
if (password == pword)
memset(pword, 0, sizeof(pword));
return(code);
}
int
krb_get_pw_in_tkt(char *user, char *instance, char *realm, char *service,
char *sinstance, int life, char *password)
{
return krb_get_pw_in_tkt2(user, instance, realm,
service, sinstance, life, password, NULL);
}
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