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      1 /*	$NetBSD: gss_pseudo_random.c,v 1.2 2017/01/28 21:31:46 christos Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2007 Kungliga Tekniska Hgskolan
      5  * (Royal Institute of Technology, Stockholm, Sweden).
      6  * All rights reserved.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  *
     12  * 1. Redistributions of source code must retain the above copyright
     13  *    notice, this list of conditions and the following disclaimer.
     14  *
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * 3. Neither the name of the Institute nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  */
     35 
     36 /* Id */
     37 
     38 #include "mech_locl.h"
     39 
     40 GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL
     41 gss_pseudo_random(OM_uint32 *minor_status,
     42 		  gss_ctx_id_t context,
     43 		  int prf_key,
     44 		  const gss_buffer_t prf_in,
     45 		  ssize_t desired_output_len,
     46 		  gss_buffer_t prf_out)
     47 {
     48     struct _gss_context *ctx = (struct _gss_context *) context;
     49     gssapi_mech_interface m;
     50     OM_uint32 major_status;
     51 
     52     _mg_buffer_zero(prf_out);
     53     *minor_status = 0;
     54 
     55     if (ctx == NULL) {
     56 	*minor_status = 0;
     57 	return GSS_S_NO_CONTEXT;
     58     }
     59 
     60     m = ctx->gc_mech;
     61 
     62     if (m->gm_pseudo_random == NULL)
     63 	return GSS_S_UNAVAILABLE;
     64 
     65     major_status = (*m->gm_pseudo_random)(minor_status, ctx->gc_ctx,
     66 					  prf_key, prf_in, desired_output_len,
     67 					  prf_out);
     68     if (major_status != GSS_S_COMPLETE)
     69 	_gss_mg_error(m, major_status, *minor_status);
     70 
     71     return major_status;
     72 }
     73