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/*
Copyright (c) 2000 The Regents of the University of Michigan.
All rights reserved.
Copyright (c) 2002 Bruce Fields <bfields@UMICH.EDU>
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 University 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 ``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 REGENTS 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.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif /* HAVE_CONFIG_H */
#include <sys/param.h>
#include <sys/stat.h>
#include <rpc/rpc.h>
#include <pwd.h>
#include <stdio.h>
#include <unistd.h>
#include <ctype.h>
#include <string.h>
#include <fcntl.h>
#include <errno.h>
#include <nfsidmap.h>
#include <nfslib.h>
#include <time.h>
#include "svcgssd.h"
#include "gss_util.h"
#include "gss_names.h"
#include "err_util.h"
#include "context.h"
#include "misc.h"
#include "gss_oids.h"
#include "svcgssd_krb5.h"
static int
get_krb5_hostbased_name(gss_buffer_desc *name, char **hostbased_name)
{
char *p, *sname = NULL;
if (strchr(name->value, '@') && strchr(name->value, '/')) {
if ((sname = calloc(name->length, 1)) == NULL) {
printerr(0, "ERROR: get_krb5_hostbased_name failed "
"to allocate %d bytes\n", name->length);
return -1;
}
/* read in name and instance and replace '/' with '@' */
sscanf(name->value, "%[^@]", sname);
p = strrchr(sname, '/');
if (p == NULL) { /* The '@' preceeded the '/' */
free(sname);
return -1;
}
*p = '@';
}
*hostbased_name = sname;
return 0;
}
int
get_hostbased_client_name(gss_name_t client_name, gss_OID mech,
char **hostbased_name)
{
u_int32_t maj_stat, min_stat;
gss_buffer_desc name;
gss_OID name_type = GSS_C_NO_OID;
char *cname;
int res = -1;
*hostbased_name = NULL; /* preset in case we fail */
/* Get the client's gss authenticated name */
maj_stat = gss_display_name(&min_stat, client_name, &name, &name_type);
if (maj_stat != GSS_S_COMPLETE) {
pgsserr("get_hostbased_client_name: gss_display_name",
maj_stat, min_stat, mech);
goto out_err;
}
if (name.length >= 0xffff) { /* don't overflow */
printerr(0, "ERROR: get_hostbased_client_name: "
"received gss_name is too long (%d bytes)\n",
name.length);
goto out_rel_buf;
}
/* For Kerberos, transform the NT_KRB5_PRINCIPAL name to
* an NT_HOSTBASED_SERVICE name */
if (g_OID_equal(&krb5oid, mech)) {
if (get_krb5_hostbased_name(&name, &cname) != 0)
goto out_rel_buf;
*hostbased_name = cname;
} else {
printerr(1, "WARNING: unknown/unsupport mech OID\n");
goto out_rel_buf;
}
res = 0;
out_rel_buf:
gss_release_buffer(&min_stat, &name);
out_err:
return res;
}
void
get_hostbased_client_buffer(gss_name_t client_name, gss_OID mech,
gss_buffer_t buf)
{
char *hname;
if (!get_hostbased_client_name(client_name, mech, &hname)) {
buf->length = strlen(hname) + 1;
buf->value = hname;
} else {
buf->length = 0;
buf->value = NULL;
}
}
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