kdc/hprop-common.c

   1 /*
   2  * Copyright (c) 1997 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  *
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * 3. All advertising materials mentioning features or use of this software
  18  *    must display the following acknowledgement:
  19  *      This product includes software developed by Kungliga Tekniska
  20  *      Högskolan and its contributors.
  21  *
  22  * 4. Neither the name of the Institute nor the names of its contributors
  23  *    may be used to endorse or promote products derived from this software
  24  *    without specific prior written permission.
  25  *
  26  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  36  * SUCH DAMAGE.
  37  */
  38
  39 #include "hprop.h"
  40
  41 RCSID("$Id$");
  42
  43 krb5_error_code
  44 send_priv(krb5_context context, krb5_auth_context ac,
  45           krb5_data *data, int fd)
  46 {
  47     krb5_data packet;
  48     krb5_error_code ret;
  49     unsigned char net_len[4];
  50
  51     ret = krb5_mk_priv (context,
  52                         ac,
  53                         data,
  54                         &packet,
  55                         NULL);
  56     if (ret)
  57         return ret;
  58
  59     net_len[0] = (packet.length >> 24) & 0xff;
  60     net_len[1] = (packet.length >> 16) & 0xff;
  61     net_len[2] = (packet.length >> 8) & 0xff;
  62     net_len[3] = packet.length & 0xff;
  63
  64     if (krb5_net_write (context, &fd, net_len, 4) != 4)
  65         ret = errno;
  66     else if (krb5_net_write (context, &fd,
  67                              packet.data, packet.length) != packet.length)
  68         ret =  errno;
  69     krb5_data_free(&packet);
  70     return ret;
  71 }
  72
  73 krb5_error_code
  74 recv_priv(krb5_context context, krb5_auth_context ac, int fd, krb5_data *out)
  75 {
  76     krb5_error_code ret;
  77     unsigned char tmp[4];
  78     unsigned char *buf;
  79     size_t len;
  80     krb5_data data;
  81
  82     if(krb5_net_read(context, &fd, tmp, 4) != 4)
  83         return errno;
  84     len = (tmp[0] << 24) | (tmp[1] << 16) | (tmp[2] << 8) | tmp[3];
  85     buf = malloc(len);
  86     if(krb5_net_read(context, &fd, buf, len) != len)
  87         return errno;
  88     data.data = buf;
  89     data.length = len;
  90     ret = krb5_rd_priv(context, ac, &data, out, NULL);
  91     if(ret) return ret;
  92     free(buf);
  93     return 0;
  94 }
  95
  96 krb5_error_code
  97 send_clear(krb5_context context, int fd, krb5_data data)
  98 {
  99     unsigned char tmp[4];
 100     int len;
 101
 102     tmp[0] = (data.length >> 24) & 0xff;
 103     tmp[1] = (data.length >> 16) & 0xff;
 104     tmp[2] = (data.length >> 8) & 0xff;
 105     tmp[3] = (data.length >> 0) & 0xff;
 106     len = write(fd, tmp, sizeof(tmp));
 107     if(len == sizeof(tmp))
 108         len = write(fd, data.data, data.length);
 109     if(len != data.length)
 110         return errno;
 111     return 0;
 112 }
 113
 114 krb5_error_code
 115 recv_clear(krb5_context context, int fd, krb5_data *out)
 116 {
 117     unsigned char tmp[4];
 118     int len;
 119     len = read(fd, tmp, sizeof(tmp));
 120     if(len == 0){
 121         memset(out, 0, sizeof(*out));
 122         return 0;
 123     }
 124
 125     if(len == sizeof(tmp)){
 126         len = (tmp[0] << 24) | (tmp[1] << 16) | (tmp[2] << 8) | tmp[3];
 127         krb5_data_alloc(out, len);
 128         len = read(fd, out->data, out->length);
 129     }
 130     if(len != out->length)
 131         return errno;
 132     return 0;
 133 }