3a6229f64a
Microsoft will sometimes split GSS tokens when they exceed a certain size in some protocols. This is specified in [MS-SPNG]: Simple and Protected GSS-API Negotiation Mechanism (SPNEGO) Extension https://winprotocoldoc.blob.core.windows.net/productionwindowsarchives/MS-SPNG/%5bMS-SPNG%5d.pdf sections 3.1.5.4 to 3.1.5.9. We extend gss_accept_sec_context() to recognise partial tokens and to accumulate the fragments until an entire token is available to be processed. If the entire token is not yet available, GSS_S_CONTINUE_NEEDED is returned with a zero length output token. This is specified in RFC2744 page 25-26 to indicate that no reply need be sent. We include updates to the test framework to test split tokens when using SPNEGO.
63 lines
2.3 KiB
C
63 lines
2.3 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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* 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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* $FreeBSD: src/lib/libgssapi/gss_delete_sec_context.c,v 1.1 2005/12/29 14:40:20 dfr Exp $
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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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gss_delete_sec_context(OM_uint32 *minor_status,
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gss_ctx_id_t *context_handle,
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gss_buffer_t output_token)
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{
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OM_uint32 major_status;
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struct _gss_context *ctx = (struct _gss_context *) *context_handle;
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if (output_token)
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_mg_buffer_zero(output_token);
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*minor_status = 0;
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major_status = GSS_S_COMPLETE;
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if (!ctx)
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return GSS_S_COMPLETE;
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free(ctx->gc_free_this);
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/*
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* If we have an implementation ctx, delete it,
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* otherwise fake an empty token.
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*/
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if (ctx->gc_ctx) {
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major_status = ctx->gc_mech->gm_delete_sec_context(
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minor_status, &ctx->gc_ctx, output_token);
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}
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free(ctx);
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*context_handle = GSS_C_NO_CONTEXT;
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return major_status;
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}
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