kcm/connect.c

   1 /*
   2  * Copyright (c) 1997-2005 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  * All rights reserved.
   5  *
   6  * Portions Copyright (c) 2009 Apple Inc. All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * 3. Neither the name of the Institute nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35
  36 #include "kcm_locl.h"
  37
  38 void
  39 kcm_service(void *ctx, const heim_idata *req,
  40             const heim_icred cred,
  41             heim_ipc_complete complete,
  42             heim_sipc_call cctx)
  43 {
  44     kcm_client peercred;
  45     krb5_error_code ret;
  46     krb5_data request, rep;
  47     unsigned char *buf;
  48     size_t len;
  49
  50     krb5_data_zero(&rep);
  51
  52     peercred.uid = heim_ipc_cred_get_uid(cred);
  53     peercred.gid = heim_ipc_cred_get_gid(cred);
  54     peercred.pid = heim_ipc_cred_get_pid(cred);
  55     peercred.session = heim_ipc_cred_get_session(cred);
  56
  57     if (req->length < 4) {
  58         kcm_log(1, "malformed request from process %d (too short)",
  59                 peercred.pid);
  60         (*complete)(cctx, EINVAL, NULL);
  61         return;
  62     }
  63
  64     buf = req->data;
  65     len = req->length;
  66
  67     if (buf[0] != KCM_PROTOCOL_VERSION_MAJOR ||
  68         buf[1] != KCM_PROTOCOL_VERSION_MINOR) {
  69         kcm_log(1, "incorrect protocol version %d.%d from process %d",
  70                 buf[0], buf[1], peercred.pid);
  71         (*complete)(cctx, EINVAL, NULL);
  72         return;
  73     }
  74
  75     request.data = buf + 2;
  76     request.length = len - 2;
  77
  78     /* buf is now pointing at opcode */
  79
  80     ret = kcm_dispatch(kcm_context, &peercred, &request, &rep);
  81
  82     (*complete)(cctx, ret, &rep);
  83     krb5_data_free(&rep);
  84 }