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/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/* lib/krb5/krb/bld_princ.c - Build a principal from a list of strings */
/*
* Copyright 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.
*/
#include <stdarg.h>
#include "k5-int.h"
static krb5_error_code
build_principal_va(krb5_context context, krb5_principal princ,
unsigned int rlen, const char *realm, va_list ap)
{
krb5_error_code retval = 0;
char *r = NULL;
krb5_data *data = NULL;
krb5_int32 count = 0;
krb5_int32 size = 2; /* initial guess at needed space */
char *component = NULL;
data = malloc(size * sizeof(krb5_data));
if (!data) { retval = ENOMEM; }
if (!retval) {
r = strdup(realm);
if (!r) { retval = ENOMEM; }
}
while (!retval && (component = va_arg(ap, char *))) {
if (count == size) {
krb5_data *new_data = NULL;
size *= 2;
new_data = realloc(data, size * sizeof(krb5_data));
if (new_data) {
data = new_data;
} else {
retval = ENOMEM;
}
}
if (!retval) {
data[count].length = strlen(component);
data[count].data = strdup(component);
if (!data[count].data) { retval = ENOMEM; }
count++;
}
}
if (!retval) {
princ->type = KRB5_NT_UNKNOWN;
princ->magic = KV5M_PRINCIPAL;
princ->realm = make_data(r, rlen);
princ->data = data;
princ->length = count;
r = NULL; /* take ownership */
data = NULL; /* take ownership */
}
if (data) {
while (--count >= 0) {
free(data[count].data);
}
free(data);
}
free(r);
return retval;
}
krb5_error_code KRB5_CALLCONV
krb5_build_principal_va(krb5_context context,
krb5_principal princ,
unsigned int rlen,
const char *realm,
va_list ap)
{
return build_principal_va(context, princ, rlen, realm, ap);
}
krb5_error_code KRB5_CALLCONV
krb5_build_principal_alloc_va(krb5_context context,
krb5_principal *princ,
unsigned int rlen,
const char *realm,
va_list ap)
{
krb5_error_code retval = 0;
krb5_principal p;
p = malloc(sizeof(krb5_principal_data));
if (p == NULL)
return ENOMEM;
retval = build_principal_va(context, p, rlen, realm, ap);
if (retval) {
free(p);
return retval;
}
*princ = p;
return 0;
}
krb5_error_code KRB5_CALLCONV_C
krb5_build_principal(krb5_context context,
krb5_principal * princ,
unsigned int rlen,
const char * realm, ...)
{
krb5_error_code retval = 0;
va_list ap;
va_start(ap, realm);
retval = krb5_build_principal_alloc_va(context, princ, rlen, realm, ap);
va_end(ap);
return retval;
}
/*Anonymous and well known principals*/
static const char anon_realm_str[] = KRB5_ANONYMOUS_REALMSTR;
static const krb5_data anon_realm_data = {
KV5M_DATA, sizeof(anon_realm_str) - 1, (char *) anon_realm_str
};
static const char wellknown_str[] = KRB5_WELLKNOWN_NAMESTR;
static const char anon_str[] = KRB5_ANONYMOUS_PRINCSTR;
static const krb5_data anon_princ_data[] = {
{ KV5M_DATA, sizeof(wellknown_str) - 1, (char *) wellknown_str },
{ KV5M_DATA, sizeof(anon_str) - 1, (char *) anon_str }
};
const krb5_principal_data anon_princ = {
KV5M_PRINCIPAL,
{ KV5M_DATA, sizeof(anon_realm_str) - 1, (char *) anon_realm_str },
(krb5_data *) anon_princ_data, 2, KRB5_NT_WELLKNOWN
};
const krb5_data * KRB5_CALLCONV
krb5_anonymous_realm()
{
return &anon_realm_data;
}
krb5_const_principal KRB5_CALLCONV
krb5_anonymous_principal()
{
return &anon_princ;
}
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