e0bb9c10ca
Implement the GSS-API credential store API extensions defined by MIT here: https://k5wiki.kerberos.org/wiki/Projects/Credential_Store_extensions Note: we kill off gss_acquire_cred_ext() here. This was never a public API, although mechanisms could have implemented it and I briefly used it in my BrowserID prototype mechanism. gss_acquire_cred_ext_from() occupies the place in the dispatch table where gss_acquire_cred_ext() used to, but this structure was never visible outside Heimdal (i.e. it is only used by internal mechanisms); (Mechanisms that need to accept arbitrary key/value dictionaries from applications should now implement gss_acquire_cred_from().)
254 lines
7.8 KiB
C
254 lines
7.8 KiB
C
/*
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* Copyright (c) 2003 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 "gsskrb5_locl.h"
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OM_uint32 GSSAPI_CALLCONV _gsskrb5_add_cred_from (
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OM_uint32 *minor_status,
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gss_cred_id_t input_cred_handle,
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gss_const_name_t desired_name,
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const gss_OID desired_mech,
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gss_cred_usage_t cred_usage,
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OM_uint32 initiator_time_req,
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OM_uint32 acceptor_time_req,
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gss_const_key_value_set_t cred_store,
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gss_cred_id_t *output_cred_handle,
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gss_OID_set *actual_mechs,
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OM_uint32 *initiator_time_rec,
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OM_uint32 *acceptor_time_rec)
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{
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krb5_context context;
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OM_uint32 major, lifetime;
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gsskrb5_cred cred, handle;
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krb5_const_principal dname;
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handle = NULL;
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cred = (gsskrb5_cred)input_cred_handle;
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dname = (krb5_const_principal)desired_name;
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if (cred == NULL && output_cred_handle == NULL) {
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*minor_status = EINVAL;
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return GSS_S_CALL_INACCESSIBLE_WRITE;
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}
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GSSAPI_KRB5_INIT (&context);
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if (desired_mech != GSS_C_NO_OID &&
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gss_oid_equal(desired_mech, GSS_KRB5_MECHANISM) == 0) {
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*minor_status = 0;
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return GSS_S_BAD_MECH;
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}
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if (cred == NULL) {
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/*
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* Acquire a credential; output_cred_handle can't be NULL, see above.
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*/
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heim_assert(output_cred_handle != NULL,
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"internal error in _gsskrb5_add_cred()");
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major = _gsskrb5_acquire_cred_from(minor_status, desired_name,
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min(initiator_time_req,
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acceptor_time_req),
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GSS_C_NO_OID_SET,
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cred_usage,
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cred_store,
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output_cred_handle,
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actual_mechs, &lifetime);
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if (major != GSS_S_COMPLETE)
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goto failure;
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} else {
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/*
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* Check that we're done or copy input to output if
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* output_cred_handle != NULL.
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*/
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HEIMDAL_MUTEX_lock(&cred->cred_id_mutex);
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/* Check if requested output usage is compatible with output usage */
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if (cred->usage != cred_usage && cred->usage != GSS_C_BOTH) {
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HEIMDAL_MUTEX_unlock(&cred->cred_id_mutex);
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*minor_status = GSS_KRB5_S_G_BAD_USAGE;
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return(GSS_S_FAILURE);
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}
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/* Check that we have the same name */
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if (dname != NULL &&
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krb5_principal_compare(context, dname,
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cred->principal) != FALSE) {
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HEIMDAL_MUTEX_unlock(&cred->cred_id_mutex);
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*minor_status = 0;
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return GSS_S_BAD_NAME;
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}
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if (output_cred_handle == NULL) {
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/*
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* This case is basically useless as we implement a single
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* mechanism here, so we can't add elements to the
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* input_cred_handle.
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*/
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HEIMDAL_MUTEX_unlock(&cred->cred_id_mutex);
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*minor_status = 0;
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return GSS_S_COMPLETE;
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}
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/*
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* Copy input to output -- this works as if we were a
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* GSS_Duplicate_cred() for one mechanism element.
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*/
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handle = calloc(1, sizeof(*handle));
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if (handle == NULL) {
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if (cred != NULL)
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HEIMDAL_MUTEX_unlock(&cred->cred_id_mutex);
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*minor_status = ENOMEM;
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return (GSS_S_FAILURE);
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}
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handle->usage = cred_usage;
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handle->endtime = cred->endtime;
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handle->principal = NULL;
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handle->keytab = NULL;
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handle->ccache = NULL;
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handle->mechanisms = NULL;
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HEIMDAL_MUTEX_init(&handle->cred_id_mutex);
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major = GSS_S_FAILURE;
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*minor_status = krb5_copy_principal(context, cred->principal,
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&handle->principal);
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if (*minor_status) {
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HEIMDAL_MUTEX_unlock(&cred->cred_id_mutex);
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free(handle);
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return GSS_S_FAILURE;
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}
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if (cred->keytab) {
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char *name = NULL;
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*minor_status = krb5_kt_get_full_name(context, cred->keytab,
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&name);
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if (*minor_status)
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goto failure;
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*minor_status = krb5_kt_resolve(context, name, &handle->keytab);
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krb5_xfree(name);
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if (*minor_status)
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goto failure;
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}
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if (cred->ccache) {
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const char *type, *name;
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char *type_name = NULL;
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type = krb5_cc_get_type(context, cred->ccache);
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if (type == NULL){
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*minor_status = ENOMEM;
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goto failure;
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}
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if (strcmp(type, "MEMORY") == 0) {
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*minor_status = krb5_cc_new_unique(context, type,
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NULL, &handle->ccache);
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if (*minor_status)
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goto failure;
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*minor_status = krb5_cc_copy_cache(context, cred->ccache,
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handle->ccache);
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if (*minor_status)
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goto failure;
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} else {
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name = krb5_cc_get_name(context, cred->ccache);
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if (name == NULL) {
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*minor_status = ENOMEM;
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goto failure;
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}
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if (asprintf(&type_name, "%s:%s", type, name) == -1 ||
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type_name == NULL) {
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*minor_status = ENOMEM;
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goto failure;
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}
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*minor_status = krb5_cc_resolve(context, type_name,
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&handle->ccache);
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free(type_name);
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if (*minor_status)
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goto failure;
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}
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}
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major = gss_create_empty_oid_set(minor_status, &handle->mechanisms);
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if (major != GSS_S_COMPLETE)
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goto failure;
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major = gss_add_oid_set_member(minor_status, GSS_KRB5_MECHANISM,
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&handle->mechanisms);
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if (major != GSS_S_COMPLETE)
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goto failure;
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HEIMDAL_MUTEX_unlock(&cred->cred_id_mutex);
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major = _gsskrb5_inquire_cred(minor_status, (gss_cred_id_t)cred,
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NULL, &lifetime, NULL, actual_mechs);
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if (major != GSS_S_COMPLETE)
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goto failure;
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*output_cred_handle = (gss_cred_id_t)handle;
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}
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if (initiator_time_rec)
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*initiator_time_rec = lifetime;
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if (acceptor_time_rec)
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*acceptor_time_rec = lifetime;
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*minor_status = 0;
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return major;
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failure:
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if (handle) {
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if (handle->principal)
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krb5_free_principal(context, handle->principal);
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if (handle->keytab)
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krb5_kt_close(context, handle->keytab);
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if (handle->ccache)
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krb5_cc_destroy(context, handle->ccache);
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if (handle->mechanisms)
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gss_release_oid_set(NULL, &handle->mechanisms);
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free(handle);
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}
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if (cred && output_cred_handle)
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HEIMDAL_MUTEX_unlock(&cred->cred_id_mutex);
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return major;
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}
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