lib/libgssapi/gss_pseudo_random.c

   1 /*-
   2  * Copyright (c) 2007 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  *
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * 3. Neither the name of the Institute nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33 /* $FreeBSD$ */
  34 /* $Id: gss_pseudo_random.c 20053 2007-01-24 01:31:35Z lha $ */
  35
  36 #include <gssapi/gssapi.h>
  37
  38 #include "mech_switch.h"
  39 #include "context.h"
  40 #include "utils.h"
  41
  42 OM_uint32
  43 gss_pseudo_random(OM_uint32 *minor_status,
  44                   gss_ctx_id_t context,
  45                   int prf_key,
  46                   const gss_buffer_t prf_in,
  47                   ssize_t desired_output_len,
  48                   gss_buffer_t prf_out)
  49 {
  50     struct _gss_context *ctx = (struct _gss_context *) context;
  51     struct _gss_mech_switch *m;
  52     OM_uint32 major_status;
  53
  54     _gss_buffer_zero(prf_out);
  55     *minor_status = 0;
  56
  57     if (ctx == NULL) {
  58         *minor_status = 0;
  59         return GSS_S_NO_CONTEXT;
  60     }
  61     m = ctx->gc_mech;
  62
  63     if (m->gm_pseudo_random == NULL)
  64         return GSS_S_UNAVAILABLE;
  65
  66     major_status = (*m->gm_pseudo_random)(minor_status, ctx->gc_ctx,
  67                                           prf_key, prf_in, desired_output_len,
  68                                           prf_out);
  69     if (major_status != GSS_S_COMPLETE)
  70             _gss_mg_error(m, major_status, *minor_status);
  71
  72     return major_status;
  73 }