| /* |
| * Copyright (c) 1995, 1996, 1997 |
| * 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 const char rcsid[] _U_ = |
| "@(#) $Header: /tcpdump/master/tcpdump/print-krb.c,v 1.23 2003-11-16 09:36:26 guy Exp $"; |
| #endif |
| |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| |
| #include <tcpdump-stdinc.h> |
| |
| #include <stdio.h> |
| |
| #include "interface.h" |
| #include "addrtoname.h" |
| #include "extract.h" |
| |
| static const u_char *c_print(register const u_char *, register const u_char *); |
| static const u_char *krb4_print_hdr(const u_char *); |
| static void krb4_print(const u_char *); |
| |
| #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_int8_t pvno; /* Protocol Version */ |
| u_int8_t type; /* Type+B */ |
| }; |
| |
| static char tstr[] = " [|kerberos]"; |
| |
| static struct tok 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 tok 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} |
| }; |
| |
| static const u_char * |
| c_print(register const u_char *s, register const u_char *ep) |
| { |
| register u_char c; |
| register int flag; |
| |
| flag = 1; |
| while (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); |
| } |
| |
| static const u_char * |
| krb4_print_hdr(const u_char *cp) |
| { |
| cp += 2; |
| |
| #define PRINT if ((cp = c_print(cp, snapend)) == NULL) goto trunc |
| |
| PRINT; |
| putchar('.'); |
| PRINT; |
| putchar('@'); |
| PRINT; |
| return (cp); |
| |
| trunc: |
| fputs(tstr, stdout); |
| return (NULL); |
| |
| #undef PRINT |
| } |
| |
| static void |
| krb4_print(const u_char *cp) |
| { |
| register const struct krb *kp; |
| u_char type; |
| u_short len; |
| |
| #define PRINT if ((cp = c_print(cp, snapend)) == NULL) goto trunc |
| /* True if struct krb is little endian */ |
| #define IS_LENDIAN(kp) (((kp)->type & 0x01) != 0) |
| #define KTOHSP(kp, cp) (IS_LENDIAN(kp) ? EXTRACT_LE_16BITS(cp) : EXTRACT_16BITS(cp)) |
| |
| kp = (struct krb *)cp; |
| |
| if ((&kp->type) >= snapend) { |
| fputs(tstr, stdout); |
| return; |
| } |
| |
| type = kp->type & (0xFF << 1); |
| |
| printf(" %s %s: ", |
| IS_LENDIAN(kp) ? "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(*cp); |
| printf(" %dmin ", *cp++ * 5); |
| PRINT; |
| putchar('.'); |
| PRINT; |
| break; |
| |
| case AUTH_MSG_APPL_REQUEST: |
| cp += 2; |
| TCHECK(*cp); |
| printf("v%d ", *cp++); |
| PRINT; |
| TCHECK(*cp); |
| printf(" (%d)", *cp++); |
| TCHECK(*cp); |
| printf(" (%d)", *cp); |
| break; |
| |
| case AUTH_MSG_KDC_REPLY: |
| if ((cp = krb4_print_hdr(cp)) == NULL) |
| return; |
| cp += 10; /* timestamp + n + exp + kvno */ |
| TCHECK2(*cp, sizeof(short)); |
| len = KTOHSP(kp, cp); |
| printf(" (%d)", len); |
| break; |
| |
| case AUTH_MSG_ERR_REPLY: |
| if ((cp = krb4_print_hdr(cp)) == NULL) |
| return; |
| cp += 4; /* timestamp */ |
| TCHECK2(*cp, sizeof(short)); |
| printf(" %s ", tok2str(kerr2str, NULL, KTOHSP(kp, cp))); |
| cp += 4; |
| PRINT; |
| break; |
| |
| default: |
| fputs("(unknown)", stdout); |
| break; |
| } |
| |
| return; |
| trunc: |
| fputs(tstr, stdout); |
| } |
| |
| void |
| krb_print(const u_char *dat) |
| { |
| 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; |
| } |