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  *
  25  * Copyright (c) 2014, Intel Corporation.
  26  *
  27  * Author: Andrew Korty <ajk@iu.edu>
  28  */
  29
  30 #define DEBUG_SUBSYSTEM S_SEC
  31 #include <linux/init.h>
  32 #include <linux/module.h>
  33 #include <linux/slab.h>
  34 #include <linux/crypto.h>
  35 #include <linux/mutex.h>
  36
  37 #include <obd.h>
  38 #include <obd_class.h>
  39 #include <obd_support.h>
  40
  41 #include "gss_err.h"
  42 #include "gss_internal.h"
  43 #include "gss_api.h"
  44 #include "gss_asn1.h"
  45
  46 struct sk_ctx {
  47 };
  48
  49 static
  50 __u32 gss_import_sec_context_sk(rawobj_t *inbuf, struct gss_ctx *gss_context)
  51 {
  52         struct sk_ctx *sk_context;
  53
  54         if (inbuf == NULL || inbuf->data == NULL)
  55                 return GSS_S_FAILURE;
  56
  57         OBD_ALLOC_PTR(sk_context);
  58         if (sk_context == NULL)
  59                 return GSS_S_FAILURE;
  60
  61         gss_context->internal_ctx_id = sk_context;
  62         CDEBUG(D_SEC, "successfully imported sk context\n");
  63
  64         return GSS_S_COMPLETE;
  65 }
  66
  67 static
  68 __u32 gss_copy_reverse_context_sk(struct gss_ctx *gss_context_old,
  69                                     struct gss_ctx *gss_context_new)
  70 {
  71         struct sk_ctx *sk_context_old;
  72         struct sk_ctx *sk_context_new;
  73
  74         OBD_ALLOC_PTR(sk_context_new);
  75         if (sk_context_new == NULL)
  76                 return GSS_S_FAILURE;
  77
  78         sk_context_old = gss_context_old->internal_ctx_id;
  79         memcpy(sk_context_new, sk_context_old, sizeof(*sk_context_new));
  80         gss_context_new->internal_ctx_id = sk_context_new;
  81         CDEBUG(D_SEC, "successfully copied reverse sk context\n");
  82
  83         return GSS_S_COMPLETE;
  84 }
  85
  86 static
  87 __u32 gss_inquire_context_sk(struct gss_ctx *gss_context,
  88                                unsigned long *endtime)
  89 {
  90         *endtime = 0;
  91         return GSS_S_COMPLETE;
  92 }
  93
  94 static
  95 __u32 gss_get_mic_sk(struct gss_ctx *gss_context,
  96                      int message_count,
  97                      rawobj_t *messages,
  98                      int iov_count,
  99                      lnet_kiov_t *iovs,
 100                      rawobj_t *token)
 101 {
 102         token->data = NULL;
 103         token->len = 0;
 104
 105         return GSS_S_COMPLETE;
 106 }
 107
 108 static
 109 __u32 gss_verify_mic_sk(struct gss_ctx *gss_context,
 110                         int message_count,
 111                         rawobj_t *messages,
 112                         int iov_count,
 113                         lnet_kiov_t *iovs,
 114                         rawobj_t *token)
 115 {
 116         return GSS_S_COMPLETE;
 117 }
 118
 119 static
 120 __u32 gss_wrap_sk(struct gss_ctx *gss_context, rawobj_t *gss_header,
 121                     rawobj_t *message, int message_buffer_length,
 122                     rawobj_t *token)
 123 {
 124         return GSS_S_COMPLETE;
 125 }
 126
 127 static
 128 __u32 gss_unwrap_sk(struct gss_ctx *gss_context, rawobj_t *gss_header,
 129                       rawobj_t *token, rawobj_t *message)
 130 {
 131         return GSS_S_COMPLETE;
 132 }
 133
 134 static
 135 __u32 gss_prep_bulk_sk(struct gss_ctx *gss_context,
 136                          struct ptlrpc_bulk_desc *desc)
 137 {
 138         return GSS_S_COMPLETE;
 139 }
 140
 141 static
 142 __u32 gss_wrap_bulk_sk(struct gss_ctx *gss_context,
 143                          struct ptlrpc_bulk_desc *desc, rawobj_t *token,
 144                          int adj_nob)
 145 {
 146         return GSS_S_COMPLETE;
 147 }
 148
 149 static
 150 __u32 gss_unwrap_bulk_sk(struct gss_ctx *gss_context,
 151                            struct ptlrpc_bulk_desc *desc,
 152                            rawobj_t *token, int adj_nob)
 153 {
 154         return GSS_S_COMPLETE;
 155 }
 156
 157 static
 158 void gss_delete_sec_context_sk(void *internal_context)
 159 {
 160         struct sk_ctx *sk_context = internal_context;
 161
 162         OBD_FREE_PTR(sk_context);
 163 }
 164
 165 int gss_display_sk(struct gss_ctx *gss_context, char *buf, int bufsize)
 166 {
 167         return snprintf(buf, bufsize, "sk");
 168 }
 169
 170 static struct gss_api_ops gss_sk_ops = {
 171         .gss_import_sec_context     = gss_import_sec_context_sk,
 172         .gss_copy_reverse_context   = gss_copy_reverse_context_sk,
 173         .gss_inquire_context        = gss_inquire_context_sk,
 174         .gss_get_mic                = gss_get_mic_sk,
 175         .gss_verify_mic             = gss_verify_mic_sk,
 176         .gss_wrap                   = gss_wrap_sk,
 177         .gss_unwrap                 = gss_unwrap_sk,
 178         .gss_prep_bulk              = gss_prep_bulk_sk,
 179         .gss_wrap_bulk              = gss_wrap_bulk_sk,
 180         .gss_unwrap_bulk            = gss_unwrap_bulk_sk,
 181         .gss_delete_sec_context     = gss_delete_sec_context_sk,
 182         .gss_display                = gss_display_sk,
 183 };
 184
 185 static struct subflavor_desc gss_sk_sfs[] = {
 186         {
 187                 .sf_subflavor   = SPTLRPC_SUBFLVR_SKI,
 188                 .sf_qop         = 0,
 189                 .sf_service     = SPTLRPC_SVC_INTG,
 190                 .sf_name        = "ski"
 191         },
 192         {
 193                 .sf_subflavor   = SPTLRPC_SUBFLVR_SKPI,
 194                 .sf_qop         = 0,
 195                 .sf_service     = SPTLRPC_SVC_PRIV,
 196                 .sf_name        = "skpi"
 197         },
 198 };
 199
 200 /*
 201  * currently we leave module owner NULL
 202  */
 203 static struct gss_api_mech gss_sk_mech = {
 204         .gm_owner       = NULL, /*THIS_MODULE, */
 205         .gm_name        = "sk",
 206         .gm_oid         = (rawobj_t) {
 207                 12,
 208                 "\053\006\001\004\001\311\146\215\126\001\000\001",
 209         },
 210         .gm_ops         = &gss_sk_ops,
 211         .gm_sf_num      = 2,
 212         .gm_sfs         = gss_sk_sfs,
 213 };
 214
 215 int __init init_sk_module(void)
 216 {
 217         int status;
 218
 219         status = lgss_mech_register(&gss_sk_mech);
 220         if (status)
 221                 CERROR("Failed to register sk gss mechanism!\n");
 222
 223         return status;
 224 }
 225
 226 void cleanup_sk_module(void)
 227 {
 228         lgss_mech_unregister(&gss_sk_mech);
 229 }