4fb6a6adc9
An implementation of draft-zhu-negoex-04 for MIT Kerberos was developed in 2011. This has been recently integrated, with many fixes from Greg Hudson. This commit ports it to Heimdal. The implementation has been interoperability tested with MIT Kerberos and Windows, using the GSS EAP mechanism developed as part of the Moonshot project. The SPNEGO code was also updated to import the state machine from Apple which improves mechListMIC processing and avoids discarding initial context tokens generated during mechanism probing, that can be used for optimistic tokens. Finally, to aid in testing, the GSS-API mechanism glue configuration file can be changed using the environment variable GSS_MECH_CONFIG. This environment variable name, along with the format of the configuration file, is compatible with MIT (although it would be difficult for a single mechanism binary to support both implementations).
116 lines
3.7 KiB
C
116 lines
3.7 KiB
C
/*-
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* Copyright (c) 2005 Doug Rabson
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* All rights reserved.
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*
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* Portions Copyright (c) 2009 Apple Inc. All rights reserved.
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* Portions Copyright (c) 2019 AuriStor, Inc. 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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* 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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* 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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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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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GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL
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gssspi_exchange_meta_data(
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OM_uint32 *minor_status,
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gss_const_OID input_mech_type,
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gss_cred_id_t input_cred_handle,
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gss_ctx_id_t *context_handle,
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gss_const_name_t target_name,
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OM_uint32 req_flags,
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gss_const_buffer_t meta_data)
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{
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OM_uint32 major_status, junk;
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gssapi_mech_interface m;
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struct _gss_name *name = (struct _gss_name *) target_name;
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struct _gss_mechanism_name *mn;
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struct _gss_context *ctx = (struct _gss_context *) *context_handle;
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gss_cred_id_t cred_handle;
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int allocated_ctx;
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gss_const_OID mech_type = input_mech_type;
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*minor_status = 0;
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if (mech_type == GSS_C_NO_OID)
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return GSS_S_BAD_MECH;
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if (ctx == NULL) {
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ctx = calloc(1, sizeof(struct _gss_context));
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if (ctx == NULL) {
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*minor_status = ENOMEM;
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return GSS_S_FAILURE;
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}
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m = ctx->gc_mech = __gss_get_mechanism(mech_type);
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if (m == NULL) {
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free(ctx);
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return GSS_S_BAD_MECH;
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}
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allocated_ctx = 1;
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} else {
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m = ctx->gc_mech;
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mech_type = &m->gm_mech_oid;
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allocated_ctx = 0;
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}
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if (m->gm_exchange_meta_data == NULL) {
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major_status = GSS_S_BAD_MECH;
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goto cleanup;
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}
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major_status = _gss_find_mn(minor_status, name, mech_type, &mn);
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if (major_status != GSS_S_COMPLETE)
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goto cleanup;
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if (m->gm_flags & GM_USE_MG_CRED)
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cred_handle = input_cred_handle;
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else
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cred_handle = _gss_mg_find_mech_cred(input_cred_handle, mech_type);
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if (input_cred_handle != GSS_C_NO_CREDENTIAL &&
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cred_handle == NULL) {
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major_status = GSS_S_NO_CRED;
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goto cleanup;
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}
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/* note: mechanism is not obligated to allocate a context on success */
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major_status = m->gm_exchange_meta_data(minor_status,
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mech_type,
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cred_handle,
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&ctx->gc_ctx,
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mn ? mn->gmn_name : GSS_C_NO_NAME,
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req_flags,
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meta_data);
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if (major_status != GSS_S_COMPLETE)
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_gss_mg_error(m, *minor_status);
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cleanup:
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if (major_status != GSS_S_COMPLETE || ctx->gc_ctx == GSS_C_NO_CONTEXT)
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gss_delete_sec_context(&junk, (gss_ctx_id_t *)&ctx, GSS_C_NO_BUFFER);
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*context_handle = (gss_ctx_id_t) ctx;
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_gss_mg_log(10, "gss-emd: return %d/%d", (int)major_status, (int)*minor_status);
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return major_status;
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}
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