510ee92c11
In acquire_mech_cred(), treat a credential store with no elements as equivalent to GSS_C_NO_CRED_STORE, allowing a mechanism's gss_acquire_cred() implementation to be called.
303 lines
8.4 KiB
C
303 lines
8.4 KiB
C
/*-
|
|
* Copyright (c) 2005 Doug Rabson
|
|
* All rights reserved.
|
|
*
|
|
* Portions Copyright (c) 2009 Apple Inc. All rights reserved.
|
|
* Portions Copyright (c) 2011, 2018 PADL Software Pty Ltd.
|
|
*
|
|
* 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
|
|
*
|
|
* $FreeBSD: src/lib/libgssapi/gss_acquire_cred.c,v 1.1 2005/12/29 14:40:20 dfr Exp $
|
|
*/
|
|
|
|
#include "mech_locl.h"
|
|
|
|
/*
|
|
* Shim for gss_acquire_cred_with_password()
|
|
*/
|
|
static const char *
|
|
find_password_in_cred_store(gss_const_key_value_set_t cred_store)
|
|
{
|
|
size_t i;
|
|
|
|
if (cred_store == GSS_C_NO_CRED_STORE)
|
|
return NULL;
|
|
|
|
for (i = 0; i < cred_store->count; i++) {
|
|
if (strcmp(cred_store->elements[i].key, "password") == 0)
|
|
return cred_store->elements[i].value;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static OM_uint32
|
|
acquire_mech_cred(OM_uint32 *minor_status,
|
|
gssapi_mech_interface m,
|
|
const struct _gss_mechanism_name *mn,
|
|
OM_uint32 time_req,
|
|
gss_cred_usage_t cred_usage,
|
|
gss_const_key_value_set_t cred_store,
|
|
struct _gss_mechanism_cred **out,
|
|
OM_uint32 *time_rec)
|
|
{
|
|
OM_uint32 major_status;
|
|
struct _gss_mechanism_cred *mc;
|
|
gss_OID_set_desc mech;
|
|
const char *spassword;
|
|
|
|
*out = NULL;
|
|
if (time_rec)
|
|
*time_rec = 0;
|
|
|
|
mc = calloc(1, sizeof(struct _gss_mechanism_cred));
|
|
if (mc == NULL) {
|
|
*minor_status = ENOMEM;
|
|
return GSS_S_FAILURE;
|
|
}
|
|
|
|
mc->gmc_mech = m;
|
|
mc->gmc_mech_oid = &m->gm_mech_oid;
|
|
|
|
mech.count = 1;
|
|
mech.elements = mc->gmc_mech_oid;
|
|
|
|
if (m->gm_acquire_cred_from) {
|
|
major_status = m->gm_acquire_cred_from(minor_status,
|
|
mn ? mn->gmn_name : GSS_C_NO_NAME,
|
|
time_req,
|
|
&mech,
|
|
cred_usage,
|
|
cred_store,
|
|
&mc->gmc_cred,
|
|
NULL,
|
|
time_rec);
|
|
} else if ((cred_store == GSS_C_NO_CRED_STORE || cred_store->count == 0) &&
|
|
m->gm_acquire_cred) {
|
|
major_status = m->gm_acquire_cred(minor_status,
|
|
mn ? mn->gmn_name : GSS_C_NO_NAME,
|
|
time_req,
|
|
&mech,
|
|
cred_usage,
|
|
&mc->gmc_cred,
|
|
NULL,
|
|
time_rec);
|
|
} else if (m->gm_compat &&
|
|
m->gm_compat->gmc_acquire_cred_with_password &&
|
|
(spassword = find_password_in_cred_store(cred_store)) != NULL) {
|
|
gss_buffer_desc password;
|
|
|
|
password.length = strlen(spassword);
|
|
password.value = rk_UNCONST(spassword);
|
|
|
|
/* compat glue for loadable mechanisms that implement API-as-SPI */
|
|
major_status = m->gm_compat->gmc_acquire_cred_with_password(minor_status,
|
|
mn ? mn->gmn_name : GSS_C_NO_NAME,
|
|
&password,
|
|
time_req,
|
|
&mech,
|
|
cred_usage,
|
|
&mc->gmc_cred,
|
|
NULL,
|
|
time_rec);
|
|
} else
|
|
major_status = GSS_S_UNAVAILABLE;
|
|
|
|
heim_assert(major_status == GSS_S_COMPLETE || mc->gmc_cred == NULL,
|
|
"gss_acquire_cred_from: mech succeeded but did not return a credential");
|
|
|
|
if (major_status == GSS_S_COMPLETE)
|
|
*out = mc;
|
|
else
|
|
free(mc);
|
|
|
|
return major_status;
|
|
}
|
|
|
|
GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL
|
|
gss_acquire_cred_from(OM_uint32 *minor_status,
|
|
gss_const_name_t desired_name,
|
|
OM_uint32 time_req,
|
|
const gss_OID_set desired_mechs,
|
|
gss_cred_usage_t cred_usage,
|
|
gss_const_key_value_set_t cred_store,
|
|
gss_cred_id_t *output_cred_handle,
|
|
gss_OID_set *actual_mechs,
|
|
OM_uint32 *time_rec)
|
|
{
|
|
OM_uint32 major_status, minor;
|
|
struct _gss_name *name = (struct _gss_name *)desired_name;
|
|
gssapi_mech_interface m;
|
|
struct _gss_cred *cred = NULL;
|
|
size_t i;
|
|
OM_uint32 min_time = GSS_C_INDEFINITE;
|
|
gss_OID_set mechs = GSS_C_NO_OID_SET;
|
|
|
|
*minor_status = 0;
|
|
if (output_cred_handle == NULL)
|
|
return GSS_S_CALL_INACCESSIBLE_READ;
|
|
*output_cred_handle = GSS_C_NO_CREDENTIAL;
|
|
if (actual_mechs)
|
|
*actual_mechs = GSS_C_NO_OID_SET;
|
|
if (time_rec)
|
|
*time_rec = 0;
|
|
|
|
_gss_load_mech();
|
|
|
|
if (desired_mechs != GSS_C_NO_OID_SET) {
|
|
int only_mg_cred_mechs = -1;
|
|
|
|
for (i = 0; i < desired_mechs->count; i++) {
|
|
m = __gss_get_mechanism(&desired_mechs->elements[i]);
|
|
if (m != NULL) {
|
|
if ((m->gm_flags & GM_USE_MG_CRED) == 0)
|
|
only_mg_cred_mechs = 0;
|
|
else if (only_mg_cred_mechs == -1)
|
|
only_mg_cred_mechs = 1;
|
|
}
|
|
}
|
|
/*
|
|
* Now SPNEGO supports GM_USE_MG_CRED it's no longer necessary
|
|
* to specifically acquire SPNEGO credentials. If the caller
|
|
* did not specify any concrete mechanisms then we will acquire
|
|
* credentials for all of them.
|
|
*/
|
|
if (only_mg_cred_mechs == -1) {
|
|
*minor_status = 0;
|
|
major_status = GSS_S_BAD_MECH;
|
|
goto cleanup;
|
|
} else if (only_mg_cred_mechs == 0)
|
|
mechs = desired_mechs;
|
|
else
|
|
mechs = _gss_mech_oids;
|
|
} else
|
|
mechs = _gss_mech_oids;
|
|
|
|
cred = _gss_mg_alloc_cred();
|
|
if (cred == NULL) {
|
|
*minor_status = ENOMEM;
|
|
major_status = GSS_S_FAILURE;
|
|
goto cleanup;
|
|
}
|
|
|
|
if (actual_mechs) {
|
|
major_status = gss_create_empty_oid_set(minor_status, actual_mechs);
|
|
if (GSS_ERROR(major_status))
|
|
goto cleanup;
|
|
}
|
|
|
|
major_status = GSS_S_UNAVAILABLE; /* in case of no mechs */
|
|
|
|
for (i = 0; i < mechs->count; i++) {
|
|
struct _gss_mechanism_name *mn = NULL;
|
|
struct _gss_mechanism_cred *mc = NULL;
|
|
OM_uint32 cred_time;
|
|
|
|
m = __gss_get_mechanism(&mechs->elements[i]);
|
|
if (m == NULL || (m->gm_flags & GM_USE_MG_CRED) != 0)
|
|
continue;
|
|
|
|
if (desired_name != GSS_C_NO_NAME) {
|
|
major_status = _gss_find_mn(minor_status, name,
|
|
&mechs->elements[i], &mn);
|
|
if (major_status != GSS_S_COMPLETE)
|
|
continue;
|
|
}
|
|
|
|
major_status = acquire_mech_cred(minor_status, m, mn,
|
|
time_req, cred_usage,
|
|
cred_store, &mc, &cred_time);
|
|
if (major_status != GSS_S_COMPLETE) {
|
|
if (mechs->count == 1)
|
|
_gss_mg_error(m, *minor_status);
|
|
continue;
|
|
}
|
|
|
|
_gss_mg_log_name(10, name, &mechs->elements[i],
|
|
"gss_acquire_cred %s name: %ld/%ld",
|
|
m->gm_name,
|
|
(long)major_status, (long)*minor_status);
|
|
|
|
HEIM_TAILQ_INSERT_TAIL(&cred->gc_mc, mc, gmc_link);
|
|
|
|
if (cred_time < min_time)
|
|
min_time = cred_time;
|
|
if (actual_mechs != NULL) {
|
|
major_status = gss_add_oid_set_member(minor_status,
|
|
mc->gmc_mech_oid,
|
|
actual_mechs);
|
|
if (GSS_ERROR(major_status))
|
|
goto cleanup;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* If we didn't manage to create a single credential, return
|
|
* an error.
|
|
*/
|
|
if (!HEIM_TAILQ_FIRST(&cred->gc_mc)) {
|
|
if (mechs->count > 1) {
|
|
*minor_status = 0;
|
|
major_status = GSS_S_NO_CRED;
|
|
}
|
|
heim_assert(major_status != GSS_S_COMPLETE,
|
|
"lack of credentials must result in an error");
|
|
goto cleanup;
|
|
}
|
|
|
|
/* add all GM_USE_MG_CRED mechs such as SPNEGO */
|
|
if (actual_mechs != NULL) {
|
|
struct _gss_mech_switch *ms;
|
|
|
|
HEIM_TAILQ_FOREACH(ms, &_gss_mechs, gm_link) {
|
|
m = &ms->gm_mech;
|
|
|
|
if ((m->gm_flags & GM_USE_MG_CRED) == 0)
|
|
continue;
|
|
|
|
major_status = gss_add_oid_set_member(minor_status,
|
|
&m->gm_mech_oid,
|
|
actual_mechs);
|
|
if (GSS_ERROR(major_status))
|
|
goto cleanup;
|
|
}
|
|
}
|
|
|
|
*minor_status = 0;
|
|
major_status = GSS_S_COMPLETE;
|
|
|
|
*output_cred_handle = (gss_cred_id_t)cred;
|
|
if (time_rec)
|
|
*time_rec = min_time;
|
|
|
|
_gss_mg_log_cred(10, cred, "gss_acquire_cred_from");
|
|
|
|
cleanup:
|
|
if (major_status != GSS_S_COMPLETE) {
|
|
gss_release_cred(&minor, (gss_cred_id_t *)&cred);
|
|
if (actual_mechs)
|
|
gss_release_oid_set(&minor, actual_mechs);
|
|
}
|
|
|
|
return major_status;
|
|
}
|