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/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/*
* lib/krb5/krb/bld_princ.c
*
* 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.
*
*
* Build a principal from a list of strings
*/
#include <stdarg.h>
#include "k5-int.h"
/* Takes first component as argument for KIM API,
* which does not allow realms with zero components */
static krb5_error_code
krb5int_build_principal_va(krb5_context context,
krb5_principal princ,
unsigned int rlen,
const char *realm,
const char *first,
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; }
}
if (!retval && first) {
data[0].length = strlen(first);
data[0].data = strdup(first);
if (!data[0].data) { retval = ENOMEM; }
count++;
/* ap is only valid if first is non-NULL */
while (!retval && (component = va_arg(ap, char *))) {
if (count == size) {
krb5_data *new_data = NULL;
size *= 2;
new_data = realloc ((char *) data, sizeof(krb5_data) * size);
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;
krb5_princ_set_realm_data(context, princ, r);
krb5_princ_set_realm_length(context, princ, 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)
{
char *first = va_arg(ap, char *);
return krb5int_build_principal_va(context, princ, rlen, realm, first, ap);
}
/* Takes first component as argument for KIM API,
* which does not allow realms with zero components */
krb5_error_code KRB5_CALLCONV
krb5int_build_principal_alloc_va(krb5_context context,
krb5_principal *princ,
unsigned int rlen,
const char *realm,
const char *first,
va_list ap)
{
krb5_error_code retval = 0;
krb5_principal p = malloc(sizeof(krb5_principal_data));
if (!p) { retval = ENOMEM; }
if (!retval) {
retval = krb5int_build_principal_va(context, p, rlen, realm, first, ap);
}
if (!retval) {
*princ = p;
} else {
free(p);
}
return retval;
}
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 = malloc(sizeof(krb5_principal_data));
if (!p) { retval = ENOMEM; }
if (!retval) {
retval = krb5_build_principal_va(context, p, rlen, realm, ap);
}
if (!retval) {
*princ = p;
} else {
free(p);
}
return retval;
}
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;
}
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