Add support for printking Kerberos v4 packets (file I forgot to add)
Obtained from: John Hawkinson <jhawk@mit.edu> by way of comp.protocols.kerberos
This commit is contained in:
Garrett Wollman
parent
8f548d4466
commit
b52d94c100
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=10424
294
usr.sbin/tcpdump/tcpdump/print-krb.c
Normal file
294
usr.sbin/tcpdump/tcpdump/print-krb.c
Normal file
@ -0,0 +1,294 @@
|
||||
/*
|
||||
* Copyright (c) 1995
|
||||
* The Regents of the University of California. All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that: (1) source code distributions
|
||||
* retain the above copyright notice and this paragraph in its entirety, (2)
|
||||
* distributions including binary code include the above copyright notice and
|
||||
* this paragraph in its entirety in the documentation or other materials
|
||||
* provided with the distribution, and (3) all advertising materials mentioning
|
||||
* features or use of this software display the following acknowledgement:
|
||||
* ``This product includes software developed by the University of California,
|
||||
* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
|
||||
* the University nor the names of its contributors may be used to endorse
|
||||
* or promote products derived from this software without specific prior
|
||||
* written permission.
|
||||
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
|
||||
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
|
||||
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
|
||||
*
|
||||
* Initial contribution from John Hawkinson (jhawk@mit.edu).
|
||||
*/
|
||||
|
||||
#ifndef lint
|
||||
static char rcsid[] =
|
||||
"$Id$";
|
||||
/*
|
||||
"@(#) Header: /afs/sipb/project/tcpdump/src/tcpdump-3.0.2/RCS/print-krb.c,v 1.3 1995/08/16 05:33:27 jhawk Exp ";
|
||||
*/
|
||||
#endif
|
||||
|
||||
#include <sys/param.h>
|
||||
#include <sys/time.h>
|
||||
#include <sys/types.h>
|
||||
#include <sys/socket.h>
|
||||
|
||||
#include <netinet/in.h>
|
||||
#include <netinet/in_systm.h>
|
||||
#include <netinet/ip.h>
|
||||
#include <netinet/ip_var.h>
|
||||
#include <netinet/udp.h>
|
||||
#include <netinet/udp_var.h>
|
||||
|
||||
#include <ctype.h>
|
||||
#include <errno.h>
|
||||
#include <stdio.h>
|
||||
|
||||
#include "interface.h"
|
||||
#include "addrtoname.h"
|
||||
|
||||
const char *c_print(register const u_char *s, register const u_char *ep);
|
||||
const u_char *krb4_print_hdr(const u_char *cp);
|
||||
void krb4_print(const u_char *cp);
|
||||
void krb_print(const u_char *dat, int length);
|
||||
|
||||
|
||||
#define AUTH_MSG_KDC_REQUEST 1<<1
|
||||
#define AUTH_MSG_KDC_REPLY 2<<1
|
||||
#define AUTH_MSG_APPL_REQUEST 3<<1
|
||||
#define AUTH_MSG_APPL_REQUEST_MUTUAL 4<<1
|
||||
#define AUTH_MSG_ERR_REPLY 5<<1
|
||||
#define AUTH_MSG_PRIVATE 6<<1
|
||||
#define AUTH_MSG_SAFE 7<<1
|
||||
#define AUTH_MSG_APPL_ERR 8<<1
|
||||
#define AUTH_MSG_DIE 63<<1
|
||||
|
||||
#define KERB_ERR_OK 0
|
||||
#define KERB_ERR_NAME_EXP 1
|
||||
#define KERB_ERR_SERVICE_EXP 2
|
||||
#define KERB_ERR_AUTH_EXP 3
|
||||
#define KERB_ERR_PKT_VER 4
|
||||
#define KERB_ERR_NAME_MAST_KEY_VER 5
|
||||
#define KERB_ERR_SERV_MAST_KEY_VER 6
|
||||
#define KERB_ERR_BYTE_ORDER 7
|
||||
#define KERB_ERR_PRINCIPAL_UNKNOWN 8
|
||||
#define KERB_ERR_PRINCIPAL_NOT_UNIQUE 9
|
||||
#define KERB_ERR_NULL_KEY 10
|
||||
|
||||
struct krb {
|
||||
u_char pvno; /* Protocol Version */
|
||||
u_char type; /* Type+B */
|
||||
} ;
|
||||
|
||||
static char tstr[] = " [|kerberos]";
|
||||
|
||||
static struct token type2str[] = {
|
||||
{ AUTH_MSG_KDC_REQUEST, "KDC_REQUEST" },
|
||||
{ AUTH_MSG_KDC_REPLY, "KDC_REPLY" },
|
||||
{ AUTH_MSG_APPL_REQUEST, "APPL_REQUEST" },
|
||||
{ AUTH_MSG_APPL_REQUEST_MUTUAL, "APPL_REQUEST_MUTUAL" },
|
||||
{ AUTH_MSG_ERR_REPLY, "ERR_REPLY" },
|
||||
{ AUTH_MSG_PRIVATE, "PRIVATE" },
|
||||
{ AUTH_MSG_SAFE, "SAFE" },
|
||||
{ AUTH_MSG_APPL_ERR, "APPL_ERR" },
|
||||
{ AUTH_MSG_DIE, "DIE" },
|
||||
{ 0, NULL }
|
||||
};
|
||||
|
||||
static struct token kerr2str[] = {
|
||||
{ KERB_ERR_OK, "OK" },
|
||||
{ KERB_ERR_NAME_EXP, "NAME_EXP" },
|
||||
{ KERB_ERR_SERVICE_EXP, "SERVICE_EXP" },
|
||||
{ KERB_ERR_AUTH_EXP, "AUTH_EXP" },
|
||||
{ KERB_ERR_PKT_VER, "PKT_VER" },
|
||||
{ KERB_ERR_NAME_MAST_KEY_VER, "NAME_MAST_KEY_VER" },
|
||||
{ KERB_ERR_SERV_MAST_KEY_VER, "SERV_MAST_KEY_VER" },
|
||||
{ KERB_ERR_BYTE_ORDER, "BYTE_ORDER" },
|
||||
{ KERB_ERR_PRINCIPAL_UNKNOWN, "PRINCIPAL_UNKNOWN" },
|
||||
{ KERB_ERR_PRINCIPAL_NOT_UNIQUE, "PRINCIPAL_NOT_UNIQUE" },
|
||||
{ KERB_ERR_NULL_KEY, "NULL_KEY"},
|
||||
{ 0, NULL}
|
||||
};
|
||||
|
||||
|
||||
/* little endian (unaligned) to host byte order */
|
||||
#define vtohlp(x) ((( ((char*)(x))[0] ) ) | \
|
||||
(( ((char*)(x))[1] ) << 8) | \
|
||||
(( ((char*)(x))[2] ) << 16) | \
|
||||
(( ((char*)(x))[3] ) << 24))
|
||||
#define vtohsp(x) ((( ((char*)(x))[0] ) ) | \
|
||||
(( ((char*)(x))[1] ) << 8))
|
||||
/* network (big endian) (unaligned) to host byte order */
|
||||
#define ntohlp(x) ((( ((char*)(x))[3] ) ) | \
|
||||
(( ((char*)(x))[2] ) << 8) | \
|
||||
(( ((char*)(x))[1] ) << 16) | \
|
||||
(( ((char*)(x))[0] ) << 24))
|
||||
#define ntohsp(x) ((( ((char*)(x))[1] ) ) | \
|
||||
(( ((char*)(x))[0] ) << 8))
|
||||
|
||||
|
||||
|
||||
const char *
|
||||
c_print(register const u_char *s, register const u_char *ep)
|
||||
{
|
||||
register u_char c;
|
||||
register int flag;
|
||||
|
||||
flag = 1;
|
||||
while (ep == NULL || s < ep) {
|
||||
c = *s++;
|
||||
if (c == '\0') {
|
||||
flag = 0;
|
||||
break;
|
||||
}
|
||||
if (!isascii(c)) {
|
||||
c = toascii(c);
|
||||
putchar('M');
|
||||
putchar('-');
|
||||
}
|
||||
if (!isprint(c)) {
|
||||
c ^= 0x40; /* DEL to ?, others to alpha */
|
||||
putchar('^');
|
||||
}
|
||||
putchar(c);
|
||||
}
|
||||
if (flag)
|
||||
return NULL;
|
||||
return(s);
|
||||
}
|
||||
|
||||
|
||||
const u_char *
|
||||
krb4_print_hdr(const u_char *cp)
|
||||
{
|
||||
cp+=2;
|
||||
|
||||
#define TCHECK if (cp >= snapend) goto trunc
|
||||
#define PRINT if ((cp=c_print(cp, snapend))==NULL) goto trunc
|
||||
|
||||
TCHECK;
|
||||
PRINT;
|
||||
TCHECK;
|
||||
putchar('.'); PRINT;
|
||||
TCHECK;
|
||||
putchar('@'); PRINT;
|
||||
return(cp);
|
||||
|
||||
trunc:
|
||||
fputs(tstr, stdout);
|
||||
return(NULL);
|
||||
|
||||
#undef TCHECK
|
||||
#undef PRINT
|
||||
}
|
||||
|
||||
void krb4_print(const u_char *cp)
|
||||
{
|
||||
register const struct krb *kp;
|
||||
u_char type;
|
||||
u_short len;
|
||||
|
||||
#define TCHECK if (cp >= snapend) goto trunc
|
||||
#define PRINT if ((cp=c_print(cp, snapend))==NULL) goto trunc
|
||||
#define ENDIAN (kp->type & 0x01)
|
||||
/* ENDIAN is 1 for little, 0 for big */
|
||||
|
||||
kp = (struct krb *)cp;
|
||||
|
||||
if ((&kp->type) >= snapend) {
|
||||
fputs(tstr, stdout);
|
||||
return;
|
||||
}
|
||||
|
||||
type = kp->type & (0xFF << 1);
|
||||
|
||||
printf(" %s %s: ", ENDIAN?"le":"be", tok2str(type2str, NULL, type));
|
||||
|
||||
switch(type) {
|
||||
case AUTH_MSG_KDC_REQUEST:
|
||||
if ((cp=krb4_print_hdr(cp)) == NULL)
|
||||
return;
|
||||
cp+=4; /* ctime */
|
||||
TCHECK;
|
||||
printf(" %dmin ", *cp++ * 5);
|
||||
TCHECK;
|
||||
PRINT;
|
||||
TCHECK;
|
||||
putchar('.'); PRINT;
|
||||
break;
|
||||
case AUTH_MSG_APPL_REQUEST:
|
||||
cp+=2;
|
||||
TCHECK;
|
||||
printf("v%d ", *cp++);
|
||||
TCHECK;
|
||||
PRINT;
|
||||
TCHECK;
|
||||
printf(" (%d)", *cp++);
|
||||
TCHECK;
|
||||
printf(" (%d)", *cp);
|
||||
TCHECK;
|
||||
break;
|
||||
case AUTH_MSG_KDC_REPLY:
|
||||
if ((cp=krb4_print_hdr(cp)) == NULL)
|
||||
return;
|
||||
cp+=10; /* timestamp + n + exp + kvno */
|
||||
TCHECK;
|
||||
len=ENDIAN? vtohsp(cp) : ntohsp(cp);
|
||||
printf(" (%d)", len);
|
||||
TCHECK;
|
||||
break;
|
||||
case AUTH_MSG_ERR_REPLY:
|
||||
if ((cp=krb4_print_hdr(cp)) == NULL)
|
||||
return;
|
||||
cp+=4; /* timestamp */
|
||||
TCHECK;
|
||||
printf(" %s ", tok2str(kerr2str, NULL,
|
||||
ENDIAN? vtohlp(cp) :
|
||||
ntohlp(cp)
|
||||
));
|
||||
cp+=4;
|
||||
TCHECK;
|
||||
PRINT;
|
||||
break;
|
||||
default:
|
||||
fputs("(unknown)", stdout);
|
||||
break;
|
||||
}
|
||||
|
||||
return;
|
||||
trunc:
|
||||
fputs(tstr, stdout);
|
||||
#undef TCHECK
|
||||
}
|
||||
|
||||
void
|
||||
krb_print(const u_char *dat, int length)
|
||||
{
|
||||
register const struct krb *kp;
|
||||
|
||||
kp = (struct krb *)dat;
|
||||
|
||||
if (dat >= snapend) {
|
||||
fputs(tstr, stdout);
|
||||
return;
|
||||
}
|
||||
|
||||
switch (kp->pvno) {
|
||||
case 1:
|
||||
case 2:
|
||||
case 3:
|
||||
printf(" v%d", kp->pvno);
|
||||
break;
|
||||
case 4:
|
||||
printf(" v%d", kp->pvno);
|
||||
krb4_print((const u_char*)kp);
|
||||
break;
|
||||
case 106:
|
||||
case 107:
|
||||
fputs(" v5", stdout);
|
||||
/* Decode ASN.1 here "someday" */
|
||||
break;
|
||||
}
|
||||
return;
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user