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/*
* lib/krb5/krb/in_tkt_pwd.c
*
* Copyright 1990,1991 by the Massachusetts Institute of Technology.
* All Rights Reserved.
*
* Export of this software from the United States of America may
* 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. Furthermore if you modify this software you must label
* your software as modified software and not distribute it in such a
* fashion that it might be confused with the original M.I.T. software.
* 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.
*
*
* krb5_get_in_tkt_with_password()
*/
#include "k5-int.h"
extern char *krb5_default_pwd_prompt1;
/*
* key-producing procedure for use by krb5_get_in_tkt_with_password.
*/
static krb5_error_code pwd_keyproc
(krb5_context,
const krb5_enctype,
krb5_data *,
krb5_const_pointer,
krb5_keyblock **);
static krb5_error_code
pwd_keyproc(krb5_context context, krb5_enctype type, krb5_data *salt,
krb5_const_pointer keyseed, krb5_keyblock **key)
{
krb5_error_code retval;
krb5_data * password;
unsigned int pwsize;
password = (krb5_data *)keyseed;
if (!password->length) {
pwsize = BUFSIZ;
if ((password->data = malloc(pwsize)) == NULL)
return ENOMEM;
if ((retval = krb5_read_password(context, krb5_default_pwd_prompt1, 0,
password->data, &pwsize))) {
return retval;
}
password->length = pwsize;
}
if (!(*key = (krb5_keyblock *)malloc(sizeof(**key))))
return ENOMEM;
if ((retval = krb5_c_string_to_key(context, type, password, salt, *key)))
krb5_xfree(*key);
return(retval);
}
/*
Attempts to get an initial ticket for creds->client to use server
creds->server, (realm is taken from creds->client), with options
options, and using creds->times.starttime, creds->times.endtime,
creds->times.renew_till as from, till, and rtime.
creds->times.renew_till is ignored unless the RENEWABLE option is requested.
If addrs is non-NULL, it is used for the addresses requested. If it is
null, the system standard addresses are used.
If password is non-NULL, it is converted using the cryptosystem entry
point for a string conversion routine, seeded with the client's name.
If password is passed as NULL, the password is read from the terminal,
and then converted into a key.
A succesful call will place the ticket in the credentials cache ccache.
returns system errors, encryption errors
*/
krb5_error_code KRB5_CALLCONV
krb5_get_in_tkt_with_password(krb5_context context, krb5_flags options,
krb5_address *const *addrs, krb5_enctype *ktypes,
krb5_preauthtype *pre_auth_types,
const char *password, krb5_ccache ccache,
krb5_creds *creds, krb5_kdc_rep **ret_as_reply)
{
krb5_error_code retval;
krb5_data data;
if ((data.data = (char *)password)) {
data.length = strlen(password);
} else {
data.length = 0;
}
retval = krb5_get_in_tkt(context, options, addrs, ktypes, pre_auth_types,
pwd_keyproc, (krb5_pointer) &data,
krb5_kdc_rep_decrypt_proc, 0,
creds, ccache, ret_as_reply);
if ((password == NULL) && (data.data)) {
memset(data.data, 0, strlen(data.data));
free(data.data);
}
return retval;
}
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