release/src/router/nfs-utils/utils/gssd/context_spkm3.c

   1 /*
   2   Copyright (c) 2004 The Regents of the University of Michigan.
   3   All rights reserved.
   4
   5   Redistribution and use in source and binary forms, with or without
   6   modification, are permitted provided that the following conditions
   7   are met:
   8
   9   1. Redistributions of source code must retain the above copyright
  10      notice, this list of conditions and the following disclaimer.
  11   2. Redistributions in binary form must reproduce the above copyright
  12      notice, this list of conditions and the following disclaimer in the
  13      documentation and/or other materials provided with the distribution.
  14   3. Neither the name of the University nor the names of its
  15      contributors may be used to endorse or promote products derived
  16      from this software without specific prior written permission.
  17
  18   THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  19   WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  20   MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  21   DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  22   FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  23   CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  24   SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  25   BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  26   LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  27   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  28   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29 */
  30
  31 #ifdef HAVE_CONFIG_H
  32 #include <config.h>
  33 #endif  /* HAVE_CONFIG_H */
  34
  35 #include <stdio.h>
  36 #include <syslog.h>
  37 #include <string.h>
  38 #include <gssapi/gssapi.h>
  39 #include <rpc/rpc.h>
  40 #include <rpc/auth_gss.h>
  41 #include "gss_util.h"
  42 #include "gss_oids.h"
  43 #include "err_util.h"
  44 #include "context.h"
  45
  46 #ifdef HAVE_SPKM3_H
  47
  48 #include <spkm3.h>
  49
  50 /*
  51  * Function: prepare_spkm3_ctx_buffer()
  52  *
  53  * Prepare spkm3 lucid context for the kernel
  54  *
  55  *      buf->length should be:
  56  *
  57  *      version 4
  58  *      ctx_id 4 + 12
  59  *      qop 4
  60  *      mech_used 4 + 7
  61  *      ret_fl  4
  62  *      req_fl  4
  63  *      share   4 + key_len
  64  *      conf_alg 4 + oid_len
  65  *      d_conf_key 4 + key_len
  66  *      intg_alg 4 + oid_len
  67  *      d_intg_key 4 + key_len
  68  *      kyestb 4 + oid_len
  69  *      owl alg 4 + oid_len
  70 */
  71 static int
  72 prepare_spkm3_ctx_buffer(gss_spkm3_lucid_ctx_t *lctx, gss_buffer_desc *buf)
  73 {
  74         char *p, *end;
  75         unsigned int buf_size = 0;
  76
  77         buf_size = sizeof(lctx->version) +
  78                 lctx->ctx_id.length + sizeof(lctx->ctx_id.length) +
  79                 sizeof(lctx->endtime) +
  80                 sizeof(lctx->mech_used.length) + lctx->mech_used.length +
  81                 sizeof(lctx->ret_flags) +
  82                 sizeof(lctx->conf_alg.length) + lctx->conf_alg.length +
  83                 sizeof(lctx->derived_conf_key.length) +
  84                 lctx->derived_conf_key.length +
  85                 sizeof(lctx->intg_alg.length) + lctx->intg_alg.length +
  86                 sizeof(lctx->derived_integ_key.length) +
  87                 lctx->derived_integ_key.length;
  88
  89         if (!(buf->value = calloc(1, buf_size)))
  90                 goto out_err;
  91         p = buf->value;
  92         end = buf->value + buf_size;
  93
  94         if (WRITE_BYTES(&p, end, lctx->version))
  95                 goto out_err;
  96         printerr(2, "DEBUG: exporting version = %d\n", lctx->version);
  97
  98         if (write_buffer(&p, end, &lctx->ctx_id))
  99                 goto out_err;
 100         printerr(2, "DEBUG: exporting ctx_id(%d)\n", lctx->ctx_id.length);
 101
 102         if (WRITE_BYTES(&p, end, lctx->endtime))
 103                 goto out_err;
 104         printerr(2, "DEBUG: exporting endtime = %d\n", lctx->endtime);
 105
 106         if (write_buffer(&p, end, &lctx->mech_used))
 107                 goto out_err;
 108         printerr(2, "DEBUG: exporting mech oid (%d)\n", lctx->mech_used.length);
 109
 110         if (WRITE_BYTES(&p, end, lctx->ret_flags))
 111                 goto out_err;
 112         printerr(2, "DEBUG: exporting ret_flags = %d\n", lctx->ret_flags);
 113
 114         if (write_buffer(&p, end, &lctx->conf_alg))
 115                 goto out_err;
 116         printerr(2, "DEBUG: exporting conf_alg oid (%d)\n", lctx->conf_alg.length);
 117
 118         if (write_buffer(&p, end, &lctx->derived_conf_key))
 119                 goto out_err;
 120         printerr(2, "DEBUG: exporting conf key (%d)\n", lctx->derived_conf_key.length);
 121
 122         if (write_buffer(&p, end, &lctx->intg_alg))
 123                 goto out_err;
 124         printerr(2, "DEBUG: exporting intg_alg oid (%d)\n", lctx->intg_alg.length);
 125
 126         if (write_buffer(&p, end, &lctx->derived_integ_key))
 127                 goto out_err;
 128         printerr(2, "DEBUG: exporting intg key (%d)\n", lctx->derived_integ_key.length);
 129
 130         buf->length = p - (char *)buf->value;
 131         return 0;
 132 out_err:
 133         printerr(0, "ERROR: failed serializing spkm3 context for kernel\n");
 134         if (buf->value) free(buf->value);
 135         buf->length = 0;
 136
 137         return -1;
 138 }
 139
 140 /* ANDROS: need to determine which fields of the spkm3_gss_ctx_id_desc_t
 141  * are needed in the kernel for get_mic, validate, wrap, unwrap, and destroy
 142  * and only export those fields to the kernel.
 143  */
 144 int
 145 serialize_spkm3_ctx(gss_ctx_id_t ctx, gss_buffer_desc *buf, int32_t *endtime)
 146 {
 147         OM_uint32 vers, ret, maj_stat, min_stat;
 148         void *ret_ctx = 0;
 149         gss_spkm3_lucid_ctx_t     *lctx;
 150
 151         printerr(1, "serialize_spkm3_ctx called\n");
 152
 153         printerr(2, "DEBUG: serialize_spkm3_ctx: lucid version!\n");
 154         maj_stat = gss_export_lucid_sec_context(&min_stat, &ctx, 1, &ret_ctx);
 155         if (maj_stat != GSS_S_COMPLETE)
 156                 goto out_err;
 157
 158         lctx = (gss_spkm3_lucid_ctx_t *)ret_ctx;
 159
 160         vers = lctx->version;
 161         if (vers != 1) {
 162                 printerr(0, "ERROR: unsupported spkm3 context version %d\n",
 163                         vers);
 164                 goto out_err;
 165         }
 166         ret = prepare_spkm3_ctx_buffer(lctx, buf);
 167
 168         if (endtime)
 169                 *endtime = lctx->endtime;
 170
 171         maj_stat = gss_free_lucid_sec_context(&min_stat, ctx, ret_ctx);
 172
 173         if (maj_stat != GSS_S_COMPLETE)
 174                 printerr(0, "WARN: failed to free lucid sec context\n");
 175         if (ret)
 176                 goto out_err;
 177         printerr(2, "DEBUG: serialize_spkm3_ctx: success\n");
 178         return 0;
 179
 180 out_err:
 181         printerr(2, "DEBUG: serialize_spkm3_ctx: failed\n");
 182         return -1;
 183 }
 184 #endif /* HAVE_SPKM3_H */