/* $NetBSD: print-krb.c,v 1.3 2004/09/27 23:04:24 dyoung Exp $ */ /* * 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). */ #include #ifndef lint #if 0 static const char rcsid[] _U_ = "@(#) Header: /tcpdump/master/tcpdump/print-krb.c,v 1.21.2.2 2003/11/16 08:51:30 guy Exp"; #else __RCSID("$NetBSD: print-krb.c,v 1.3 2004/09/27 23:04:24 dyoung Exp $"); #endif #endif #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include #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; }