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      1 /*	$NetBSD: gss_export_sec_context.c,v 1.2 2017/01/28 21:31:46 christos Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2005 Doug Rabson
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  *
     28  *	$FreeBSD: src/lib/libgssapi/gss_export_sec_context.c,v 1.1 2005/12/29 14:40:20 dfr Exp $
     29  */
     30 
     31 #include "mech_locl.h"
     32 
     33 GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL
     34 gss_export_sec_context(OM_uint32 *minor_status,
     35     gss_ctx_id_t *context_handle,
     36     gss_buffer_t interprocess_token)
     37 {
     38 	OM_uint32 major_status;
     39 	struct _gss_context *ctx = (struct _gss_context *) *context_handle;
     40 	gssapi_mech_interface m = ctx->gc_mech;
     41 	gss_buffer_desc buf;
     42 
     43 	_mg_buffer_zero(interprocess_token);
     44 
     45 	major_status = m->gm_export_sec_context(minor_status,
     46 	    &ctx->gc_ctx, &buf);
     47 
     48 	if (major_status == GSS_S_COMPLETE) {
     49 		unsigned char *p;
     50 
     51 		free(ctx);
     52 		*context_handle = GSS_C_NO_CONTEXT;
     53 		interprocess_token->length = buf.length
     54 			+ 2 + m->gm_mech_oid.length;
     55 		interprocess_token->value = malloc(interprocess_token->length);
     56 		if (!interprocess_token->value) {
     57 			/*
     58 			 * We are in trouble here - the context is
     59 			 * already gone. This is allowed as long as we
     60 			 * set the caller's context_handle to
     61 			 * GSS_C_NO_CONTEXT, which we did above.
     62 			 * Return GSS_S_FAILURE.
     63 			 */
     64 			_mg_buffer_zero(interprocess_token);
     65 			*minor_status = ENOMEM;
     66 			return (GSS_S_FAILURE);
     67 		}
     68 		p = interprocess_token->value;
     69 		p[0] = m->gm_mech_oid.length >> 8;
     70 		p[1] = m->gm_mech_oid.length;
     71 		memcpy(p + 2, m->gm_mech_oid.elements, m->gm_mech_oid.length);
     72 		memcpy(p + 2 + m->gm_mech_oid.length, buf.value, buf.length);
     73 		gss_release_buffer(minor_status, &buf);
     74 	} else {
     75 		_gss_mg_error(m, major_status, *minor_status);
     76 	}
     77 
     78 	return (major_status);
     79 }
     80