lib/gssapi/mech/gss_export_sec_context.c

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