2709f28a1b
krb5_cc_cache_match() searches all ccache collections for a ccache that has credentials for a given principal name. This includes MEMORY ccaches, which means it can find the same ccache as is referenced by a GSS cred handle given to gss_store_cred(), which means that gss_store_cred() can fail. For now we work around this by including a private variant of krb5_cc_cache_match() that only searches the default ccache, not all collections. Eventually we should ensure that krb5_cc_default() also searches all collection-type (other than MEMORY) ccaches for a default credential, then we can go back to using krb5_cc_cache_match() (though we'll need to make sure that MEMORY is searched last or not at all).
145 lines
4.8 KiB
C
145 lines
4.8 KiB
C
/*
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* Copyright (c) 2009 Kungliga Tekniska Högskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "mech_locl.h"
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static OM_uint32
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store_mech_cred(OM_uint32 *minor_status,
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gssapi_mech_interface m,
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const struct _gss_mechanism_cred *mc,
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gss_cred_usage_t input_usage,
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OM_uint32 overwrite_cred,
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OM_uint32 default_cred,
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gss_const_key_value_set_t cred_store,
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gss_cred_usage_t *usage_stored)
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{
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OM_uint32 major_status;
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if (m->gm_store_cred_into)
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major_status = m->gm_store_cred_into(minor_status, mc->gmc_cred,
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input_usage, &m->gm_mech_oid,
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overwrite_cred, default_cred,
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cred_store, NULL, usage_stored);
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else if (cred_store == GSS_C_NO_CRED_STORE && m->gm_store_cred)
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major_status = m->gm_store_cred(minor_status, mc->gmc_cred,
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input_usage, &m->gm_mech_oid,
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overwrite_cred, default_cred,
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NULL, usage_stored);
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else
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major_status = GSS_S_UNAVAILABLE;
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return major_status;
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}
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/*
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* See RFC5588 for gss_store_cred(). This function is a variant that takes a
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* const key/value hashmap-like thing that specifies a credential store in a
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* mechanism- and implementation-specific way, though Heimdal and MIT agree on
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* at least the following keys for the Kerberos mechanism: ccache, keytab, and
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* client_keytab.
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*/
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GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL
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gss_store_cred_into(OM_uint32 *minor_status,
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gss_const_cred_id_t input_cred_handle,
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gss_cred_usage_t input_usage,
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const gss_OID desired_mech,
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OM_uint32 overwrite_cred,
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OM_uint32 default_cred,
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gss_const_key_value_set_t cred_store,
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gss_OID_set *elements_stored,
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gss_cred_usage_t *cred_usage_stored)
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{
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struct _gss_cred *cred = (struct _gss_cred *) input_cred_handle;
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struct _gss_mechanism_cred *mc;
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OM_uint32 major_status;
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OM_uint32 minor;
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size_t successes;
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if (input_cred_handle == NULL)
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return GSS_S_CALL_INACCESSIBLE_READ;
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if (minor_status == NULL)
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return GSS_S_CALL_INACCESSIBLE_WRITE;
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*minor_status = 0;
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if (cred_usage_stored)
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*cred_usage_stored = 0;
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if (elements_stored) {
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*elements_stored = GSS_C_NO_OID_SET;
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major_status = gss_create_empty_oid_set(minor_status,
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elements_stored);
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if (major_status != GSS_S_COMPLETE)
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return major_status;
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}
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major_status = GSS_S_NO_CRED;
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successes = 0;
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HEIM_SLIST_FOREACH(mc, &cred->gc_mc, gmc_link) {
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gssapi_mech_interface m = mc->gmc_mech;
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if (m == NULL)
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continue;
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if (desired_mech != GSS_C_NO_OID &&
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!gss_oid_equal(&m->gm_mech_oid, desired_mech))
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continue;
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major_status = store_mech_cred(minor_status, m, mc,
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input_usage, overwrite_cred,
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default_cred, cred_store,
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cred_usage_stored);
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if (major_status == GSS_S_COMPLETE) {
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if (elements_stored && desired_mech != GSS_C_NO_OID)
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gss_add_oid_set_member(&minor, desired_mech, elements_stored);
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successes++;
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} else if (desired_mech != GSS_C_NO_OID) {
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_gss_mg_error(m, *minor_status);
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gss_release_oid_set(&minor, elements_stored);
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return major_status;
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}
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}
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if (successes > 0) {
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*minor_status = 0;
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major_status = GSS_S_COMPLETE;
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}
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heim_assert(successes || major_status != GSS_S_COMPLETE,
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"cred storage failed, but no error raised");
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return major_status;
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}
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