lustre/ptlrpc/gss/gss_api.h

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * Modifications for Lustre
   5  * Copyright 2004, Cluster File Systems, Inc.
   6  * All rights reserved
   7  * Author: Eric Mei <ericm@clusterfs.com>
   8  */
   9
  10 /*
  11  * Somewhat simplified version of the gss api.
  12  *
  13  * Dug Song <dugsong@monkey.org>
  14  * Andy Adamson <andros@umich.edu>
  15  * Bruce Fields <bfields@umich.edu>
  16  * Copyright (c) 2000 The Regents of the University of Michigan
  17  *
  18  */
  19
  20 #ifndef __PTLRPC_GSS_GSS_API_H_
  21 #define __PTLRPC_GSS_GSS_API_H_
  22
  23 struct gss_api_mech;
  24
  25 /* The mechanism-independent gss-api context: */
  26 struct gss_ctx {
  27         struct gss_api_mech    *mech_type;
  28         void                   *internal_ctx_id;
  29 };
  30
  31 #define GSS_C_NO_BUFFER         ((rawobj_t) 0)
  32 #define GSS_C_NO_CONTEXT        ((struct gss_ctx *) 0)
  33 #define GSS_C_NULL_OID          ((rawobj_t) 0)
  34
  35 /*
  36  * gss-api prototypes; note that these are somewhat simplified versions of
  37  * the prototypes specified in RFC 2744.
  38  */
  39 __u32 lgss_import_sec_context(
  40                 rawobj_t                *input_token,
  41                 struct gss_api_mech     *mech,
  42                 struct gss_ctx         **ctx);
  43 __u32 lgss_copy_reverse_context(
  44                 struct gss_ctx          *ctx,
  45                 struct gss_ctx         **ctx_new);
  46 __u32 lgss_inquire_context(
  47                 struct gss_ctx          *ctx,
  48                 unsigned long           *endtime);
  49 __u32 lgss_get_mic(
  50                 struct gss_ctx          *ctx,
  51                 int                      msgcnt,
  52                 rawobj_t                *msgs,
  53                 rawobj_t                *mic_token);
  54 __u32 lgss_verify_mic(
  55                 struct gss_ctx          *ctx,
  56                 int                      msgcnt,
  57                 rawobj_t                *msgs,
  58                 rawobj_t                *mic_token);
  59 __u32 lgss_wrap(
  60                 struct gss_ctx          *ctx,
  61                 rawobj_t                *gsshdr,
  62                 rawobj_t                *msg,
  63                 int                      msg_buflen,
  64                 rawobj_t                *out_token);
  65 __u32 lgss_unwrap(
  66                 struct gss_ctx          *ctx,
  67                 rawobj_t                *gsshdr,
  68                 rawobj_t                *token,
  69                 rawobj_t                *out_msg);
  70 __u32 lgss_plain_encrypt(
  71                 struct gss_ctx          *ctx,
  72                 int                      decrypt,
  73                 int                      length,
  74                 void                    *in_buf,
  75                 void                    *out_buf);
  76 __u32 lgss_delete_sec_context(
  77                 struct gss_ctx         **ctx);
  78 int lgss_display(
  79                 struct gss_ctx          *ctx,
  80                 char                    *buf,
  81                 int                      bufsize);
  82
  83 struct subflavor_desc {
  84         __u32           sf_subflavor;
  85         __u32           sf_qop;
  86         __u32           sf_service;
  87         char           *sf_name;
  88 };
  89
  90 /* Each mechanism is described by the following struct: */
  91 struct gss_api_mech {
  92         struct list_head        gm_list;
  93         struct module          *gm_owner;
  94         char                   *gm_name;
  95         rawobj_t                gm_oid;
  96         atomic_t                gm_count;
  97         struct gss_api_ops     *gm_ops;
  98         int                     gm_sf_num;
  99         struct subflavor_desc  *gm_sfs;
 100 };
 101
 102 /* and must provide the following operations: */
 103 struct gss_api_ops {
 104         __u32 (*gss_import_sec_context)(
 105                         rawobj_t               *input_token,
 106                         struct gss_ctx         *ctx);
 107         __u32 (*gss_copy_reverse_context)(
 108                         struct gss_ctx         *ctx,
 109                         struct gss_ctx         *ctx_new);
 110         __u32 (*gss_inquire_context)(
 111                         struct gss_ctx         *ctx,
 112                         unsigned long          *endtime);
 113         __u32 (*gss_get_mic)(
 114                         struct gss_ctx         *ctx,
 115                         int                     msgcnt,
 116                         rawobj_t               *msgs,
 117                         rawobj_t               *mic_token);
 118         __u32 (*gss_verify_mic)(
 119                         struct gss_ctx         *ctx,
 120                         int                     msgcnt,
 121                         rawobj_t               *msgs,
 122                         rawobj_t               *mic_token);
 123         __u32 (*gss_wrap)(
 124                         struct gss_ctx         *ctx,
 125                         rawobj_t               *gsshdr,
 126                         rawobj_t               *msg,
 127                         int                     msg_buflen,
 128                         rawobj_t               *out_token);
 129         __u32 (*gss_unwrap)(
 130                         struct gss_ctx         *ctx,
 131                         rawobj_t               *gsshdr,
 132                         rawobj_t               *token,
 133                         rawobj_t               *out_msg);
 134         __u32 (*gss_plain_encrypt)(
 135                         struct gss_ctx         *ctx,
 136                         int                     decrypt,
 137                         int                     length,
 138                         void                   *in_buf,
 139                         void                   *out_buf);
 140         void (*gss_delete_sec_context)(
 141                         void                   *ctx);
 142         int  (*gss_display)(
 143                         struct gss_ctx         *ctx,
 144                         char                   *buf,
 145                         int                     bufsize);
 146 };
 147
 148 int lgss_mech_register(struct gss_api_mech *mech);
 149 void lgss_mech_unregister(struct gss_api_mech *mech);
 150
 151 struct gss_api_mech * lgss_OID_to_mech(rawobj_t *oid);
 152 struct gss_api_mech * lgss_name_to_mech(char *name);
 153 struct gss_api_mech * lgss_subflavor_to_mech(__u32 subflavor);
 154
 155 struct gss_api_mech * lgss_mech_get(struct gss_api_mech *mech);
 156 void lgss_mech_put(struct gss_api_mech *mech);
 157
 158 #endif /* __PTLRPC_GSS_GSS_API_H_ */