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/*
* $Source$
* $Author$
*
* Copyright 1991 by the Massachusetts Institute of Technology.
* All Rights Reserved.
*
* For copying and distribution information, please see the file
* <krb5/copyright.h>.
*
* One end of the user-user client-server pair.
*/
#if !defined(lint) && !defined(SABER)
static char rcsid_server_c[] =
"$Id$";
#endif
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <stdio.h>
#include <fcntl.h>
#include <krb5/krb5.h>
#include <krb5/ext-proto.h>
#include <krb5/los-proto.h>
#include <com_err.h>
extern krb5_flags krb5_kdc_default_options;
/* fd 0 is a tcp socket used to talk to the client */
int main(argc, argv)
int argc;
char *argv[];
{
krb5_data pname_data, tkt_data;
int l, sock = 0;
int retval;
struct sockaddr_in l_inaddr, f_inaddr; /* local, foreign address */
krb5_address laddr, faddr;
krb5_creds creds;
krb5_ccache cc;
krb5_data msgtext, msg;
krb5_int32 seqno;
#ifndef DEBUG
freopen("/tmp/uu-server.log", "w", stderr);
#endif
krb5_init_ets();
#ifdef DEBUG
{
int acc;
struct servent *sp;
int namelen = sizeof(f_inaddr);
if ((sock = socket(PF_INET, SOCK_STREAM, 0)) < 0) {
com_err("uu-server", errno, "creating socket");
exit(3);
}
l_inaddr.sin_family = AF_INET;
l_inaddr.sin_addr.s_addr = 0;
if (!(sp = getservbyname("uu-sample", "tcp"))) {
com_err("uu-server", 0, "can't find uu-sample/tcp");
exit(3);
}
l_inaddr.sin_port = sp->s_port;
if (bind(sock, &l_inaddr, sizeof(l_inaddr))) {
com_err("uu-server", errno, "binding socket");
exit(3);
}
if (listen(sock, 1) == -1) {
com_err("uu-server", errno, "listening");
exit(3);
}
if ((acc = accept(sock, (struct sockaddr *)&f_inaddr, &namelen)) == -1) {
com_err("uu-server", errno, "accepting");
exit(3);
}
dup2(acc, 0);
close(sock);
sock = 0;
}
#endif
if (retval = krb5_read_message((krb5_pointer) &sock, &pname_data)) {
com_err ("uu-server", retval, "reading pname");
return 2;
}
if (retval = krb5_read_message((krb5_pointer) &sock, &tkt_data)) {
com_err ("uu-server", retval, "reading ticket data");
return 2;
}
if (retval = krb5_cc_default(&cc))
{
com_err("uu-server", retval, "getting credentials cache");
return 4;
}
memset ((char*)&creds, 0, sizeof(creds));
if (retval = krb5_cc_get_principal(cc, &creds.client))
{
com_err("uu-client", retval, "getting principal name");
return 6;
}
/* client sends it already null-terminated. */
printf ("uu-server: client principal is \"%s\".\n", pname_data.data);
if (retval = krb5_parse_name(pname_data.data, &creds.server))
{
com_err("uu-server", retval, "parsing client name");
return 3;
}
creds.second_ticket = tkt_data;
printf ("uu-server: client ticket is %d bytes.\n",
creds.second_ticket.length);
if (retval = krb5_get_credentials(KRB5_GC_USER_USER, cc, &creds))
{
com_err("uu-server", retval, "getting user-user ticket");
return 5;
}
#ifndef DEBUG
l = sizeof(f_inaddr);
if (getpeername(0, (struct sockaddr *)&f_inaddr, &l) == -1)
{
com_err("uu-server", errno, "getting client address");
return 6;
}
#endif
faddr.addrtype = ADDRTYPE_INET;
faddr.length = sizeof (f_inaddr.sin_addr);
faddr.contents = (krb5_octet *)&f_inaddr.sin_addr;
l = sizeof(l_inaddr);
if (getsockname(0, (caddr_t)&l_inaddr, &l) == -1)
{
com_err("uu-server", errno, "getting local address");
return 6;
}
laddr.addrtype = ADDRTYPE_INET;
laddr.length = sizeof (l_inaddr.sin_addr);
laddr.contents = (krb5_octet *)&l_inaddr.sin_addr;
/* send a ticket/authenticator to the other side, so it can get the key
we're using for the krb_safe below. */
if (retval = krb5_generate_seq_number(&creds.keyblock, &seqno)) {
com_err("uu-server", retval, "generating sequence number");
return 8;
}
#if 1
if (retval = krb5_mk_req_extended(AP_OPTS_USE_SESSION_KEY,
0, /* no application checksum here */
&creds.times,
krb5_kdc_default_options,
seqno,
0, /* no need for subkey */
cc,
&creds,
0, /* don't need authenticator copy */
&msg)) {
com_err("uu-server", retval, "making AP_REQ");
return 8;
}
retval = krb5_write_message((krb5_pointer) &sock, &msg);
#else
retval = krb5_sendauth((krb5_pointer)&sock, "???", 0, 0,
AP_OPTS_MUTUAL_REQUIRED | AP_OPTS_USE_SESSION_KEY,
0, /* no checksum*/
&creds, cc,
0, 0, /* no sequence number or subsession key */
0, 0);
#endif
if (retval)
goto cl_short_wrt;
free(msg.data);
msgtext.length = 32;
msgtext.data = "Hello, other end of connection.";
if (retval = krb5_mk_safe(&msgtext, CKSUMTYPE_RSA_MD4_DES, &creds.keyblock,
&laddr, &faddr, seqno,
KRB5_SAFE_NOTIME|KRB5_SAFE_DOSEQUENCE, 0, &msg))
{
com_err("uu-server", retval, "encoding message to client");
return 6;
}
retval = krb5_write_message((krb5_pointer) &sock, &msg);
if (retval)
{
cl_short_wrt:
com_err("uu-server", retval, "writing message to client");
return 7;
}
return 0;
}
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