lustre/ptlrpc/gss/gss_sk_mech.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.gnu.org/licenses/gpl-2.0.html
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (C) 2013, Trustees of Indiana University
  24  * Author: Andrew Korty <ajk@iu.edu>
  25  */
  26
  27 #define DEBUG_SUBSYSTEM S_SEC
  28 #ifdef __KERNEL__
  29 #include <linux/init.h>
  30 #include <linux/module.h>
  31 #include <linux/slab.h>
  32 #include <linux/crypto.h>
  33 #include <linux/mutex.h>
  34 #else
  35 #include <liblustre.h>
  36 #endif
  37
  38 #include <obd.h>
  39 #include <obd_class.h>
  40 #include <obd_support.h>
  41
  42 #include "gss_err.h"
  43 #include "gss_internal.h"
  44 #include "gss_api.h"
  45 #include "gss_asn1.h"
  46
  47 struct sk_ctx {
  48 };
  49
  50 static
  51 __u32 gss_import_sec_context_sk(rawobj_t *inbuf, struct gss_ctx *gss_context)
  52 {
  53         struct sk_ctx *sk_context;
  54
  55         if (inbuf == NULL || inbuf->data == NULL)
  56                 return GSS_S_FAILURE;
  57
  58         OBD_ALLOC_PTR(sk_context);
  59         if (sk_context == NULL)
  60                 return GSS_S_FAILURE;
  61
  62         gss_context->internal_ctx_id = sk_context;
  63         CDEBUG(D_SEC, "succesfully imported sk context\n");
  64
  65         return GSS_S_COMPLETE;
  66 }
  67
  68 static
  69 __u32 gss_copy_reverse_context_sk(struct gss_ctx *gss_context_old,
  70                                     struct gss_ctx *gss_context_new)
  71 {
  72         struct sk_ctx *sk_context_old;
  73         struct sk_ctx *sk_context_new;
  74
  75         OBD_ALLOC_PTR(sk_context_new);
  76         if (sk_context_new == NULL)
  77                 return GSS_S_FAILURE;
  78
  79         sk_context_old = gss_context_old->internal_ctx_id;
  80         memcpy(sk_context_new, sk_context_old, sizeof(*sk_context_new));
  81         gss_context_new->internal_ctx_id = sk_context_new;
  82         CDEBUG(D_SEC, "succesfully copied reverse sk context\n");
  83
  84         return GSS_S_COMPLETE;
  85 }
  86
  87 static
  88 __u32 gss_inquire_context_sk(struct gss_ctx *gss_context,
  89                                unsigned long *endtime)
  90 {
  91         *endtime = 0;
  92         return GSS_S_COMPLETE;
  93 }
  94
  95 static
  96 __u32 gss_get_mic_sk(struct gss_ctx *gss_context,
  97                      int message_count,
  98                      rawobj_t *messages,
  99                      int iov_count,
 100                      lnet_kiov_t *iovs,
 101                      rawobj_t *token)
 102 {
 103         token->data = NULL;
 104         token->len = 0;
 105
 106         return GSS_S_COMPLETE;
 107 }
 108
 109 static
 110 __u32 gss_verify_mic_sk(struct gss_ctx *gss_context,
 111                         int message_count,
 112                         rawobj_t *messages,
 113                         int iov_count,
 114                         lnet_kiov_t *iovs,
 115                         rawobj_t *token)
 116 {
 117         return GSS_S_COMPLETE;
 118 }
 119
 120 static
 121 __u32 gss_wrap_sk(struct gss_ctx *gss_context, rawobj_t *gss_header,
 122                     rawobj_t *message, int message_buffer_length,
 123                     rawobj_t *token)
 124 {
 125         return GSS_S_COMPLETE;
 126 }
 127
 128 static
 129 __u32 gss_unwrap_sk(struct gss_ctx *gss_context, rawobj_t *gss_header,
 130                       rawobj_t *token, rawobj_t *message)
 131 {
 132         return GSS_S_COMPLETE;
 133 }
 134
 135 static
 136 __u32 gss_prep_bulk_sk(struct gss_ctx *gss_context,
 137                          struct ptlrpc_bulk_desc *desc)
 138 {
 139         return GSS_S_COMPLETE;
 140 }
 141
 142 static
 143 __u32 gss_wrap_bulk_sk(struct gss_ctx *gss_context,
 144                          struct ptlrpc_bulk_desc *desc, rawobj_t *token,
 145                          int adj_nob)
 146 {
 147         return GSS_S_COMPLETE;
 148 }
 149
 150 static
 151 __u32 gss_unwrap_bulk_sk(struct gss_ctx *gss_context,
 152                            struct ptlrpc_bulk_desc *desc,
 153                            rawobj_t *token, int adj_nob)
 154 {
 155         return GSS_S_COMPLETE;
 156 }
 157
 158 static
 159 void gss_delete_sec_context_sk(void *internal_context)
 160 {
 161         struct sk_ctx *sk_context = internal_context;
 162
 163         OBD_FREE_PTR(sk_context);
 164 }
 165
 166 int gss_display_sk(struct gss_ctx *gss_context, char *buf, int bufsize)
 167 {
 168         return snprintf(buf, bufsize, "sk");
 169 }
 170
 171 static struct gss_api_ops gss_sk_ops = {
 172         .gss_import_sec_context     = gss_import_sec_context_sk,
 173         .gss_copy_reverse_context   = gss_copy_reverse_context_sk,
 174         .gss_inquire_context        = gss_inquire_context_sk,
 175         .gss_get_mic                = gss_get_mic_sk,
 176         .gss_verify_mic             = gss_verify_mic_sk,
 177         .gss_wrap                   = gss_wrap_sk,
 178         .gss_unwrap                 = gss_unwrap_sk,
 179         .gss_prep_bulk              = gss_prep_bulk_sk,
 180         .gss_wrap_bulk              = gss_wrap_bulk_sk,
 181         .gss_unwrap_bulk            = gss_unwrap_bulk_sk,
 182         .gss_delete_sec_context     = gss_delete_sec_context_sk,
 183         .gss_display                = gss_display_sk,
 184 };
 185
 186 static struct subflavor_desc gss_sk_sfs[] = {
 187         {
 188                 .sf_subflavor   = SPTLRPC_SUBFLVR_SKI,
 189                 .sf_qop         = 0,
 190                 .sf_service     = SPTLRPC_SVC_INTG,
 191                 .sf_name        = "ski"
 192         },
 193         {
 194                 .sf_subflavor   = SPTLRPC_SUBFLVR_SKPI,
 195                 .sf_qop         = 0,
 196                 .sf_service     = SPTLRPC_SVC_PRIV,
 197                 .sf_name        = "skpi"
 198         },
 199 };
 200
 201 /*
 202  * currently we leave module owner NULL
 203  */
 204 static struct gss_api_mech gss_sk_mech = {
 205         .gm_owner       = NULL, /*THIS_MODULE, */
 206         .gm_name        = "sk",
 207         .gm_oid         = (rawobj_t) {
 208                 12,
 209                 "\053\006\001\004\001\311\146\215\126\001\000\001",
 210         },
 211         .gm_ops         = &gss_sk_ops,
 212         .gm_sf_num      = 2,
 213         .gm_sfs         = gss_sk_sfs,
 214 };
 215
 216 int __init init_sk_module(void)
 217 {
 218         int status;
 219
 220         status = lgss_mech_register(&gss_sk_mech);
 221         if (status)
 222                 CERROR("Failed to register sk gss mechanism!\n");
 223
 224         return status;
 225 }
 226
 227 void cleanup_sk_module(void)
 228 {
 229         lgss_mech_unregister(&gss_sk_mech);
 230 }