97 lines
3.1 KiB
C
97 lines
3.1 KiB
C
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/*
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* Copyright (c) 1995, 1996, 1997 Kungliga Tekniska H<EFBFBD>gskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "kauth.h"
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RCSID("$Id: encdata.c,v 1.10 1999/12/02 16:58:31 joda Exp $");
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int
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write_encrypted (int fd, void *buf, size_t len, des_key_schedule schedule,
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des_cblock *session, struct sockaddr_in *me,
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struct sockaddr_in *him)
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{
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void *outbuf;
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int32_t outlen, l;
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int i;
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unsigned char tmp[4];
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outbuf = malloc(len + 30);
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if (outbuf == NULL)
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return -1;
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outlen = krb_mk_priv (buf, outbuf, len, schedule, session, me, him);
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if (outlen < 0) {
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free(outbuf);
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return -1;
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}
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l = outlen;
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for(i = 3; i >= 0; i--, l = l >> 8)
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tmp[i] = l & 0xff;
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if (krb_net_write (fd, tmp, 4) != 4 ||
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krb_net_write (fd, outbuf, outlen) != outlen) {
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free(outbuf);
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return -1;
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}
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free(outbuf);
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return 0;
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}
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int
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read_encrypted (int fd, void *buf, size_t len, void **ret,
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des_key_schedule schedule, des_cblock *session,
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struct sockaddr_in *him, struct sockaddr_in *me)
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{
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int status;
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int32_t l;
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MSG_DAT msg;
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unsigned char tmp[4];
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l = krb_net_read (fd, tmp, 4);
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if (l != 4)
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return l;
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l = (tmp[0] << 24) | (tmp[1] << 16) | (tmp[2] << 8) | tmp[3];
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if (l > len)
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return -1;
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if (krb_net_read (fd, buf, l) != l)
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return -1;
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status = krb_rd_priv (buf, l, schedule, session, him, me, &msg);
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if (status != RD_AP_OK) {
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fprintf (stderr, "read_encrypted: %s\n",
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krb_get_err_text(status));
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return -1;
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}
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*ret = msg.app_data;
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return msg.app_length;
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}
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