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Diffstat (limited to 'contrib/tcpdump/print-krb.c')
| -rw-r--r-- | contrib/tcpdump/print-krb.c | 261 |
1 files changed, 261 insertions, 0 deletions
diff --git a/contrib/tcpdump/print-krb.c b/contrib/tcpdump/print-krb.c new file mode 100644 index 0000000..213db64 --- /dev/null +++ b/contrib/tcpdump/print-krb.c @@ -0,0 +1,261 @@ +/* + * 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; +} |
