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/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/* lib/gssapi/krb5/store_cred.c */
/*
* Copyright 2009 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 <assert.h>
#include "k5-int.h" /* for zap() */
#include "gssapiP_krb5.h"
#include <stdarg.h>
static int
has_unexpired_creds(krb5_gss_cred_id_t kcred,
const gss_OID desired_mech,
int default_cred,
gss_const_key_value_set_t cred_store)
{
OM_uint32 major_status, minor;
gss_name_t cred_name;
gss_OID_set_desc desired_mechs;
gss_cred_id_t tmp_cred = GSS_C_NO_CREDENTIAL;
OM_uint32 time_rec;
desired_mechs.count = 1;
desired_mechs.elements = (gss_OID)desired_mech;
if (default_cred)
cred_name = GSS_C_NO_NAME;
else
cred_name = (gss_name_t)kcred->name;
major_status = krb5_gss_acquire_cred_from(&minor, cred_name, 0,
&desired_mechs, GSS_C_INITIATE,
cred_store, &tmp_cred, NULL,
&time_rec);
krb5_gss_release_cred(&minor, &tmp_cred);
return (GSS_ERROR(major_status) || time_rec);
}
static OM_uint32
copy_initiator_creds(OM_uint32 *minor_status,
gss_cred_id_t input_cred_handle,
const gss_OID desired_mech,
OM_uint32 overwrite_cred,
OM_uint32 default_cred,
gss_const_key_value_set_t cred_store)
{
OM_uint32 major_status;
krb5_error_code code;
krb5_gss_cred_id_t kcred = NULL;
krb5_context context = NULL;
krb5_ccache ccache = NULL;
const char *ccache_name;
*minor_status = 0;
if (!default_cred && cred_store == GSS_C_NO_CRED_STORE) {
*minor_status = G_STORE_NON_DEFAULT_CRED_NOSUPP;
major_status = GSS_S_FAILURE;
goto cleanup;
}
code = krb5_gss_init_context(&context);
if (code != 0) {
*minor_status = code;
major_status = GSS_S_FAILURE;
goto cleanup;
}
major_status = krb5_gss_validate_cred_1(minor_status,
input_cred_handle,
context);
if (GSS_ERROR(major_status))
goto cleanup;
kcred = (krb5_gss_cred_id_t)input_cred_handle;
if (kcred->ccache == NULL) {
*minor_status = KG_CCACHE_NOMATCH;
major_status = GSS_S_DEFECTIVE_CREDENTIAL;
goto cleanup;
}
if (!overwrite_cred &&
has_unexpired_creds(kcred, desired_mech, default_cred, cred_store)) {
major_status = GSS_S_DUPLICATE_ELEMENT;
goto cleanup;
}
major_status = kg_value_from_cred_store(cred_store,
KRB5_CS_CCACHE_URN, &ccache_name);
if (GSS_ERROR(major_status))
goto cleanup;
if (ccache_name != NULL) {
code = krb5_cc_resolve(context, ccache_name, &ccache);
if (code != 0) {
*minor_status = code;
major_status = GSS_S_CRED_UNAVAIL;
goto cleanup;
}
code = krb5_cc_initialize(context, ccache,
kcred->name->princ);
if (code != 0) {
*minor_status = code;
major_status = GSS_S_CRED_UNAVAIL;
goto cleanup;
}
}
if (ccache == NULL) {
if (!default_cred) {
*minor_status = G_STORE_NON_DEFAULT_CRED_NOSUPP;
major_status = GSS_S_FAILURE;
goto cleanup;
}
code = krb5int_cc_default(context, &ccache);
if (code != 0) {
*minor_status = code;
major_status = GSS_S_FAILURE;
goto cleanup;
}
}
code = krb5_cc_copy_creds(context, kcred->ccache, ccache);
if (code != 0) {
*minor_status = code;
major_status = GSS_S_FAILURE;
goto cleanup;
}
*minor_status = 0;
major_status = GSS_S_COMPLETE;
cleanup:
if (kcred != NULL)
k5_mutex_unlock(&kcred->lock);
if (ccache != NULL)
krb5_cc_close(context, ccache);
krb5_free_context(context);
return major_status;
}
OM_uint32 KRB5_CALLCONV
krb5_gss_store_cred(OM_uint32 *minor_status,
gss_cred_id_t input_cred_handle,
gss_cred_usage_t cred_usage,
const gss_OID desired_mech,
OM_uint32 overwrite_cred,
OM_uint32 default_cred,
gss_OID_set *elements_stored,
gss_cred_usage_t *cred_usage_stored)
{
return krb5_gss_store_cred_into(minor_status, input_cred_handle,
cred_usage, desired_mech,
overwrite_cred, default_cred,
GSS_C_NO_CRED_STORE,
elements_stored, cred_usage_stored);
}
OM_uint32 KRB5_CALLCONV
krb5_gss_store_cred_into(OM_uint32 *minor_status,
gss_cred_id_t input_cred_handle,
gss_cred_usage_t cred_usage,
const gss_OID desired_mech,
OM_uint32 overwrite_cred,
OM_uint32 default_cred,
gss_const_key_value_set_t cred_store,
gss_OID_set *elements_stored,
gss_cred_usage_t *cred_usage_stored)
{
OM_uint32 major_status;
gss_cred_usage_t actual_usage;
OM_uint32 lifetime;
if (input_cred_handle == GSS_C_NO_CREDENTIAL)
return GSS_S_NO_CRED;
major_status = GSS_S_FAILURE;
if (cred_usage == GSS_C_ACCEPT) {
*minor_status = G_STORE_ACCEPTOR_CRED_NOSUPP;
return GSS_S_FAILURE;
} else if (cred_usage != GSS_C_INITIATE && cred_usage != GSS_C_BOTH) {
*minor_status = G_BAD_USAGE;
return GSS_S_FAILURE;
}
major_status = krb5_gss_inquire_cred(minor_status, input_cred_handle,
NULL, &lifetime,
&actual_usage, elements_stored);
if (GSS_ERROR(major_status))
return major_status;
if (lifetime == 0)
return GSS_S_CREDENTIALS_EXPIRED;
if (actual_usage != GSS_C_INITIATE && actual_usage != GSS_C_BOTH) {
*minor_status = G_BAD_USAGE;
return GSS_S_FAILURE;
}
major_status = copy_initiator_creds(minor_status, input_cred_handle,
desired_mech, overwrite_cred,
default_cred, cred_store);
if (GSS_ERROR(major_status))
return major_status;
if (cred_usage_stored != NULL)
*cred_usage_stored = GSS_C_INITIATE;
return GSS_S_COMPLETE;
}
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