1 /*
2 * Copyright 2009 by the Massachusetts Institute of Technology.
3 * All Rights Reserved.
4 *
5 * Export of this software from the United States of America may
6 * require a specific license from the United States Government.
7 * It is the responsibility of any person or organization contemplating
8 * export to obtain such a license before exporting.
9 *
10 * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
11 * distribute this software and its documentation for any purpose and
12 * without fee is hereby granted, provided that the above copyright
13 * notice appear in all copies and that both that copyright notice and
14 * this permission notice appear in supporting documentation, and that
15 * the name of M.I.T. not be used in advertising or publicity pertaining
16 * to distribution of the software without specific, written prior
17 * permission. Furthermore if you modify this software you must label
18 * your software as modified software and not distribute it in such a
19 * fashion that it might be confused with the original M.I.T. software.
20 * M.I.T. makes no representations about the suitability of
21 * this software for any purpose. It is provided "as is" without express
22 * or implied warranty.
23 */
24
25 /* Glue routine for gss_pseudo_random */
26
27 #include "mglueP.h"
28
29 OM_uint32 KRB5_CALLCONV
gss_pseudo_random(OM_uint32 * minor_status,gss_ctx_id_t context_handle,int prf_key,const gss_buffer_t prf_in,ssize_t desired_output_len,gss_buffer_t prf_out)30 gss_pseudo_random (OM_uint32 *minor_status,
31 gss_ctx_id_t context_handle,
32 int prf_key,
33 const gss_buffer_t prf_in,
34 ssize_t desired_output_len,
35 gss_buffer_t prf_out)
36 {
37 OM_uint32 status;
38 gss_union_ctx_id_t ctx;
39 gss_mechanism mech;
40
41 if (minor_status != NULL)
42 *minor_status = 0;
43
44 if (prf_out != GSS_C_NO_BUFFER) {
45 prf_out->length = 0;
46 prf_out->value = NULL;
47 }
48
49 if (minor_status == NULL)
50 return GSS_S_CALL_INACCESSIBLE_WRITE;
51
52 if (context_handle == GSS_C_NO_CONTEXT)
53 return GSS_S_CALL_INACCESSIBLE_READ | GSS_S_NO_CONTEXT;
54
55 if (prf_in == GSS_C_NO_BUFFER)
56 return GSS_S_CALL_INACCESSIBLE_READ;
57
58 if (prf_out == GSS_C_NO_BUFFER)
59 return GSS_S_CALL_INACCESSIBLE_WRITE;
60
61 prf_out->length = 0;
62 prf_out->value = NULL;
63
64 /*
65 * select the approprate underlying mechanism routine and
66 * call it.
67 */
68
69 ctx = (gss_union_ctx_id_t) context_handle;
70 if (ctx->internal_ctx_id == GSS_C_NO_CONTEXT)
71 return GSS_S_NO_CONTEXT;
72 mech = gssint_get_mechanism (ctx->mech_type);
73
74 if (mech != NULL) {
75 if (mech->gss_pseudo_random != NULL) {
76 status = mech->gss_pseudo_random(minor_status,
77 ctx->internal_ctx_id,
78 prf_key,
79 prf_in,
80 desired_output_len,
81 prf_out);
82 if (status != GSS_S_COMPLETE)
83 map_error(minor_status, mech);
84 } else
85 status = GSS_S_UNAVAILABLE;
86
87 return status;
88 }
89
90 return GSS_S_BAD_MECH;
91 }
92