OpenBSD-4.6/kerberosV/src/lib/gssapi/import_name.c
/*
* Copyright (c) 1997 - 2003 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "gssapi_locl.h"
RCSID("$KTH: import_name.c,v 1.13 2003/03/16 17:33:31 lha Exp $");
static OM_uint32
parse_krb5_name (OM_uint32 *minor_status,
const char *name,
gss_name_t *output_name)
{
krb5_error_code kerr;
kerr = krb5_parse_name (gssapi_krb5_context, name, output_name);
if (kerr == 0)
return GSS_S_COMPLETE;
else if (kerr == KRB5_PARSE_ILLCHAR || kerr == KRB5_PARSE_MALFORMED) {
gssapi_krb5_set_error_string ();
*minor_status = kerr;
return GSS_S_BAD_NAME;
} else {
gssapi_krb5_set_error_string ();
*minor_status = kerr;
return GSS_S_FAILURE;
}
}
static OM_uint32
import_krb5_name (OM_uint32 *minor_status,
const gss_buffer_t input_name_buffer,
gss_name_t *output_name)
{
OM_uint32 ret;
char *tmp;
tmp = malloc (input_name_buffer->length + 1);
if (tmp == NULL) {
*minor_status = ENOMEM;
return GSS_S_FAILURE;
}
memcpy (tmp,
input_name_buffer->value,
input_name_buffer->length);
tmp[input_name_buffer->length] = '\0';
ret = parse_krb5_name(minor_status, tmp, output_name);
free(tmp);
return ret;
}
static OM_uint32
import_hostbased_name (OM_uint32 *minor_status,
const gss_buffer_t input_name_buffer,
gss_name_t *output_name)
{
krb5_error_code kerr;
char *tmp;
char *p;
char *host;
char local_hostname[MAXHOSTNAMELEN];
*output_name = NULL;
tmp = malloc (input_name_buffer->length + 1);
if (tmp == NULL) {
*minor_status = ENOMEM;
return GSS_S_FAILURE;
}
memcpy (tmp,
input_name_buffer->value,
input_name_buffer->length);
tmp[input_name_buffer->length] = '\0';
p = strchr (tmp, '@');
if (p != NULL) {
*p = '\0';
host = p + 1;
} else {
if (gethostname(local_hostname, sizeof(local_hostname)) < 0) {
*minor_status = errno;
free (tmp);
return GSS_S_FAILURE;
}
host = local_hostname;
}
kerr = krb5_sname_to_principal (gssapi_krb5_context,
host,
tmp,
KRB5_NT_SRV_HST,
output_name);
free (tmp);
*minor_status = kerr;
if (kerr == 0)
return GSS_S_COMPLETE;
else if (kerr == KRB5_PARSE_ILLCHAR || kerr == KRB5_PARSE_MALFORMED) {
gssapi_krb5_set_error_string ();
*minor_status = kerr;
return GSS_S_BAD_NAME;
} else {
gssapi_krb5_set_error_string ();
*minor_status = kerr;
return GSS_S_FAILURE;
}
}
static OM_uint32
import_export_name (OM_uint32 *minor_status,
const gss_buffer_t input_name_buffer,
gss_name_t *output_name)
{
unsigned char *p;
uint32_t length;
OM_uint32 ret;
char *name;
if (input_name_buffer->length < 10 + GSS_KRB5_MECHANISM->length)
return GSS_S_BAD_NAME;
/* TOK, MECH_OID_LEN, DER(MECH_OID), NAME_LEN, NAME */
p = input_name_buffer->value;
if (memcmp(&p[0], "\x04\x01\x00", 3) != 0 ||
p[3] != GSS_KRB5_MECHANISM->length + 2 ||
p[4] != 0x06 ||
p[5] != GSS_KRB5_MECHANISM->length ||
memcmp(&p[6], GSS_KRB5_MECHANISM->elements,
GSS_KRB5_MECHANISM->length) != 0)
return GSS_S_BAD_NAME;
p += 6 + GSS_KRB5_MECHANISM->length;
length = p[0] << 24 | p[1] << 16 | p[2] << 8 | p[3];
p += 4;
if (length > input_name_buffer->length - 10 - GSS_KRB5_MECHANISM->length)
return GSS_S_BAD_NAME;
name = malloc(length + 1);
if (name == NULL) {
*minor_status = ENOMEM;
return GSS_S_FAILURE;
}
memcpy(name, p, length);
name[length] = '\0';
ret = parse_krb5_name(minor_status, name, output_name);
free(name);
return ret;
}
int
gss_oid_equal(const gss_OID a, const gss_OID b)
{
if (a == b)
return 1;
else if (a == GSS_C_NO_OID || b == GSS_C_NO_OID || a->length != b->length)
return 0;
else
return memcmp(a->elements, b->elements, a->length) == 0;
}
OM_uint32 gss_import_name
(OM_uint32 * minor_status,
const gss_buffer_t input_name_buffer,
const gss_OID input_name_type,
gss_name_t * output_name
)
{
GSSAPI_KRB5_INIT ();
*minor_status = 0;
*output_name = GSS_C_NO_NAME;
if (gss_oid_equal(input_name_type, GSS_C_NT_HOSTBASED_SERVICE))
return import_hostbased_name (minor_status,
input_name_buffer,
output_name);
else if (gss_oid_equal(input_name_type, GSS_C_NO_OID)
|| gss_oid_equal(input_name_type, GSS_C_NT_USER_NAME)
|| gss_oid_equal(input_name_type, GSS_KRB5_NT_PRINCIPAL_NAME))
/* default printable syntax */
return import_krb5_name (minor_status,
input_name_buffer,
output_name);
else if (gss_oid_equal(input_name_type, GSS_C_NT_EXPORT_NAME)) {
return import_export_name(minor_status,
input_name_buffer,
output_name);
} else {
*minor_status = 0;
return GSS_S_BAD_NAMETYPE;
}
}