/*
 * Copyright (C) 1992,1993 Trusted Information Systems, Inc.
 *
 * Permission to include this software in the Kerberos V5 distribution
 * was graciously provided by Trusted Information Systems.
 * 
 * Trusted Information Systems makes no representation about the
 * suitability of this software for any purpose.  It is provided
 * "as is" without express or implied warranty.
 * 
 * Copyright (C) 1994 Massachusetts Institute of Technology
 * 
 * Export of this software from the United States of America may
 *   require a specific license from the United States Government.
 *   It is the responsibility of any person or organization contemplating
 *   export to obtain such a license before exporting.
 *
 * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
 * distribute this software and its documentation for any purpose and
 * without fee is hereby granted, provided that the above copyright
 * notice appear in all copies and that both that copyright notice and
 * this permission notice appear in supporting documentation, and that
 * the name of M.I.T. not be used in advertising or publicity pertaining
 * to distribution of the software without specific, written prior
 * permission.  Furthermore if you modify this software you must label
 * your software as modified software and not distribute it in such a
 * fashion that it might be confused with the original M.I.T. software.
 * M.I.T. makes no representations about the suitability of
 * this software for any purpose.  It is provided "as is" without express
 * or implied warranty.
 * 
 */

/*****************************************************************************
 * trval.c.c
 *****************************************************************************/

#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>

#define OK 0
#define NOTOK (-1)
	
	/* IDENTIFIER OCTET = TAG CLASS | FORM OF ENCODING | TAG NUMBER */
	
	/* TAG CLASSES */
#define ID_CLASS   0xc0		/* bits 8 and 7 */
#define CLASS_UNIV 0x00		/* 0 = universal */
#define CLASS_APPL 0x40		/* 1 = application */
#define CLASS_CONT 0x80		/* 2 = context-specific */
#define CLASS_PRIV 0xc0		/* 3 = private */
	
	/* FORM OF ENCODING */
#define ID_FORM   0x20		/* bit 6 */
#define FORM_PRIM 0x00		/* 0 = primitive */
#define FORM_CONS 0x20		/* 1 = constructed */
	
	/* TAG NUMBERS */
#define ID_TAG    0x1f		/* bits 5-1 */
#define PRIM_BOOL 0x01		/* Boolean */
#define PRIM_INT  0x02		/* Integer */
#define PRIM_BITS 0x03		/* Bit String */
#define PRIM_OCTS 0x04		/* Octet String */
#define PRIM_NULL 0x05		/* Null */
#define PRIM_OID  0x06		/* Object Identifier */
#define PRIM_ODE  0x07		/* Object Descriptor */
#define CONS_EXTN 0x08		/* External */
#define PRIM_REAL 0x09		/* Real */
#define PRIM_ENUM 0x0a		/* Enumerated type */
#define PRIM_ENCR 0x0b		/* Encrypted */
#define CONS_SEQ  0x10		/* SEQUENCE/SEQUENCE OF */
#define CONS_SET  0x11		/* SET/SET OF */
#define DEFN_NUMS 0x12		/* Numeric String */
#define DEFN_PRTS 0x13		/* Printable String */
#define DEFN_T61S 0x14		/* T.61 String */
#define DEFN_VTXS 0x15		/* Videotex String */
#define DEFN_IA5S 0x16		/* IA5 String */
#define DEFN_UTCT 0x17		/* UTCTime */
#define DEFN_GENT 0x18		/* Generalized Time */
#define DEFN_GFXS 0x19		/* Graphics string (ISO2375) */
#define DEFN_VISS 0x1a		/* Visible string */
#define DEFN_GENS 0x1b		/* General string */
#define DEFN_CHRS 0x1c		/* Character string */
	
#define	LEN_XTND	0x80	/* long or indefinite form */
#define	LEN_SMAX	127	/* largest short form */
#define	LEN_MASK	0x7f	/* mask to get number of bytes in length */
#define	LEN_INDF	(-1)	/* indefinite length */

#define KRB5	/* Do krb5 application types */
	
int print_types = 0;
int print_id_and_len = 1;
int print_constructed_length = 1;	
int print_primitive_length = 1;
int print_skip_context = 0;
int print_skip_tagnum = 1;
int print_context_shortcut = 0;
int do_hex = 0;
#ifdef KRB5
int print_krb5_types = 0;
#endif

int current_appl_type = -1;

#if (defined(__STDC__) || defined(__cplusplus) || defined(_MSDOS) || defined(_WIN32) || defined(KRB5_PROVIDE_PROTOTYPES)) && !defined(KRB5_NO_PROTOTYPES)
#define PROTOTYPE(x) x
#else
#define PROTOTYPE(x) ()
#endif


int decode_len PROTOTYPE((FILE *, unsigned char *, int));
int do_prim PROTOTYPE((FILE *, int, unsigned char *, int, int));
int do_cons PROTOTYPE((FILE *, unsigned char *, int, int, int *));
int do_prim_bitstring PROTOTYPE((FILE *, int, unsigned char *, int, int));
int do_prim_int PROTOTYPE((FILE *, int, unsigned char *, int, int));
int do_prim_string PROTOTYPE((FILE *, int, unsigned char *, int, int));
void print_tag_type PROTOTYPE((FILE *, int, int));
int trval(), trval2();


/****************************************************************************/

#ifdef STANDALONE

static void usage()
{
	fprintf(stderr, "Usage: trval [--types] [--krb5] [--krb5decode] [--hex] [-notypebytes] [file]\n");
	exit(1);
}

/*
 * Returns true if the option was selected.  Allow "-option" and
 * "--option" syntax, since we used to accept only "-option"
 */
int check_option(word, option)
	char *word;
	char *option;
{
	if (word[0] != '-')
		return 0;
	if (word[1] == '-')
		word++;
	if (strcmp(word+1, option))
		return 0;
	return 1;
}

int main(argc, argv)
	int argc;
	char **argv;
{
	int optflg = 1;
	FILE *fp;
	int r = 0;
	
	while (--argc > 0) {
		argv++;
		if (optflg && *(argv)[0] == '-') {
			if (check_option(*argv, "help"))
				usage();
			else if (check_option(*argv, "types"))
				print_types = 1;
			else if (check_option(*argv, "notypes"))
				print_types = 0;
			else if (check_option(*argv, "krb5"))
				print_krb5_types = 1;
			else if (check_option(*argv, "hex"))
				do_hex = 1;
			else if (check_option(*argv, "notypebytes"))
				print_id_and_len = 0;
			else if (check_option(*argv, "krb5decode")) {
				print_id_and_len = 0;
				print_krb5_types = 1;
				print_types = 1;
			} else {
				fprintf(stderr,"trval: unknown option: %s\n", *argv);
				usage();
			}
		} else {
			optflg = 0;
			if ((fp = fopen(*argv,"r")) == NULL) {
				fprintf(stderr,"trval: unable to open %s\n", *argv);
				continue;
			}
			r = trval(fp, stdout);
			fclose(fp);
		}
	}
	if (optflg) r = trval(stdin, stdout);
	
	exit(r);
}
#endif

static int convert_nibble(ch)
{
    if (isdigit(ch))
	return (ch - '0');
    if (ch >= 'a' && ch <= 'f')
	return (ch - 'a' + 10);
    if (ch >= 'A' && ch <= 'F')
	return (ch - 'A' + 10);
    return -1;
}

int trval(fin, fout)
	FILE	*fin;
	FILE	*fout;
{
	unsigned char *p;
	int maxlen;
	int len;
	int cc, cc2, n1, n2;
	int r;
	int rlen;
	
	maxlen = BUFSIZ;
	p = (unsigned char *)malloc(maxlen);
	len = 0;
	while ((cc = fgetc(fin)) != EOF) {
		if (len == maxlen) {
			maxlen += BUFSIZ;
			p = (unsigned char *)realloc(p, maxlen);
		}
		if (do_hex) {
			if (cc == ' ' || cc == '\n' || cc == '\t')
				continue;
			cc2 = fgetc(fin);
			if (cc2 == EOF)
				break;
			n1 = convert_nibble(cc);
			n2 = convert_nibble(cc2);
			cc = (n1 << 4) + n2;
		}
		p[len++] = cc;
	}
	fprintf(fout, "<%d>", len);
	r = trval2(fout, p, len, 0, &rlen);
	fprintf(fout, "\n");
	(void) free(p);
	return(r);
}

int trval2(fp, enc, len, lev, rlen)
	FILE *fp;
	unsigned char *enc;
	int len;
	int lev;
	int *rlen;
{
	int l, eid, elen, xlen, r, rlen2;
	int rlen_ext = 0;

	r = OK;

	if (len < 2) {
		fprintf(fp, "missing id and length octets (%d)\n", len);
		return(NOTOK);
	}
	
	fprintf(fp, "\n");
	for (l=0; l<lev; l++) fprintf(fp, ".  ");
	
context_restart:
	eid = enc[0];
	elen = enc[1];

	if (print_id_and_len) {
		fprintf(fp, "%02x ", eid);
		fprintf(fp, "%02x ", elen);
	}
	
	if (elen == LEN_XTND) {
		fprintf(fp,
			"indefinite length encoding not implemented (0x%02x)\n", elen);
		return(NOTOK);
	}
	
	xlen = 0;
	if (elen & LEN_XTND) {
		xlen = elen & LEN_MASK;
		if (xlen > len - 2) {
			fprintf(fp, "extended length too long (%d > %d - 2)\n", xlen, len);
			return(NOTOK);
		}
		elen = decode_len(fp, enc+2, xlen);
	}
	
	if (elen > len - 2 - xlen) {
		fprintf(fp, "length too long (%d > %d - 2 - %d)\n", elen, len, xlen);
		return(NOTOK);
	}
	
	print_tag_type(fp, eid, lev);

	if (print_context_shortcut &&
	    ((eid & ID_CLASS) == CLASS_CONT) && (lev > 0)) {
		rlen_ext += 2 + xlen;
		enc += 2 + xlen;
		goto context_restart;
	}

	switch(eid & ID_FORM) {
	case FORM_PRIM:
		r = do_prim(fp, eid & ID_TAG, enc+2+xlen, elen, lev+1);
		*rlen = 2 + xlen + elen + rlen_ext;
		break;
	case FORM_CONS:
		if (print_constructed_length) {
			fprintf(fp, "constr ");
			fprintf(fp, "<%d>", elen);
		}
		r = do_cons(fp, enc+2+xlen, elen, lev+1, &rlen2);
		*rlen = 2 + xlen + rlen2 + rlen_ext;
		break;
	}
	
	return(r);
}

int decode_len(fp, enc, len)
	FILE *fp;
	unsigned char *enc;
	int len;
{
	int rlen;
	int i;
	
	if (print_id_and_len)
		fprintf(fp, "%02x ", enc[0]);
	rlen = enc[0];
	for (i=1; i<len; i++) {
		if (print_id_and_len)
			fprintf(fp, "%02x ", enc[i]);
		rlen = (rlen * 0x100) + enc[i];
	}
	return(rlen);
}

/*
 * This is the printing function for bit strings
 */
int do_prim_bitstring(fp, tag, enc, len, lev)
	FILE *fp;
	int tag;
	unsigned char *enc;
	int len;
	int lev;
{
	int	i;
	long	num = 0;

	if (tag != PRIM_BITS || len > 5)
		return 0;

	for (i=1; i < len; i++) {
		num = num << 8;
		num += enc[i];
	}

	fprintf(fp, "0x%lx", num);
	if (enc[0])
		fprintf(fp, " (%d unused bits)", enc[0]);
	return 1;
}

/*
 * This is the printing function for integers
 */
int do_prim_int(fp, tag, enc, len, lev)
	FILE *fp;
	int tag;
	unsigned char *enc;
	int len;
	int lev;
{
	int	i;
	long	num = 0;

	if (tag != PRIM_INT || len > 4)
		return 0;

	if (enc[0] & 0x80)
		num = -1;

	for (i=0; i < len; i++) {
		num = num << 8;
		num += enc[i];
	}

	fprintf(fp, "%ld", num);
	return 1;
}


/*
 * This is the printing function which we use if it's a string or
 * other other type which is best printed as a string
 */
int do_prim_string(fp, tag, enc, len, lev)
	FILE *fp;
	int tag;
	unsigned char *enc;
	int len;
	int lev;
{
	int	i;

	/*
	 * Only try this printing function with "reasonable" types
	 */
	if ((tag < DEFN_NUMS) && (tag != PRIM_OCTS))
		return 0;

	for (i=0; i < len; i++)
		if (!isprint(enc[i]))
			return 0;
	fprintf(fp, "\"%.*s\"", len, enc);
	return 1;
}

int do_prim(fp, tag, enc, len, lev)
	FILE *fp;
	int tag;
	unsigned char *enc;
	int len;
	int lev;
{
	int n;
	int i;
	int j;
	int width;

	if (do_prim_string(fp, tag, enc, len, lev))
		return OK;
	if (do_prim_int(fp, tag, enc, len, lev))
		return OK;
	if (do_prim_bitstring(fp, tag, enc, len, lev))
		return OK;

	if (print_primitive_length)
		fprintf(fp, "<%d>", len);
	
	width = (80 - (lev * 3) - 8) / 4;
	
	for (n = 0; n < len; n++) {
		if ((n % width) == 0) {
			fprintf(fp, "\n");
			for (i=0; i<lev; i++) fprintf(fp, "   ");
		}
		fprintf(fp, "%02x ", enc[n]);
		if ((n % width) == (width-1)) {
			fprintf(fp, "    ");
			for (i=n-(width-1); i<=n; i++)
				if (isprint(enc[i])) fprintf(fp, "%c", enc[i]);
				else fprintf(fp, ".");
		}
	}
	if ((j = (n % width)) != 0) {
		fprintf(fp, "    ");
		for (i=0; i<width-j; i++) fprintf(fp, "   ");
		for (i=n-j; i<n; i++)
			if (isprint(enc[i])) fprintf(fp, "%c", enc[i]);
			else fprintf(fp, ".");
	}
	return(OK);
}

int do_cons(fp, enc, len, lev, rlen)
FILE *fp;
unsigned char *enc;
int len;
int lev;
int *rlen;
{
    int n;
    int r = 0;
    int rlen2;
    int rlent;
    int save_appl;

    save_appl = current_appl_type;
    for (n = 0, rlent = 0; n < len; n+=rlen2, rlent+=rlen2) {
	r = trval2(fp, enc+n, len-n, lev, &rlen2);
	current_appl_type = save_appl;
	if (r != OK) return(r);
    }
    if (rlent != len) {
	fprintf(fp, "inconsistent constructed lengths (%d != %d)\n",
	rlent, len);
	return(NOTOK);
    }
    *rlen = rlent;
    return(r);
}

struct typestring_table {
	int	k1, k2;
	char	*str;
	int	new_appl;
};

static char *lookup_typestring(table, key1, key2)
	struct typestring_table *table;
	int	key1, key2;
{
	struct typestring_table *ent;

	for (ent = table; ent->k1 > 0; ent++) {
		if ((ent->k1 == key1) &&
		    (ent->k2 == key2)) {
			if (ent->new_appl)
				current_appl_type = ent->new_appl;
			return ent->str;
		}
	}
	return 0;
}


struct typestring_table univ_types[] = {
	{ PRIM_BOOL, -1, "Boolean"},
	{ PRIM_INT, -1, "Integer"},
	{ PRIM_BITS, -1, "Bit String"},
	{ PRIM_OCTS, -1, "Octet String"},
	{ PRIM_NULL, -1, "Null"},
	{ PRIM_OID, -1, "Object Identifier"},
	{ PRIM_ODE, -1, "Object Descriptor"},
	{ CONS_EXTN, -1, "External"},
	{ PRIM_REAL, -1, "Real"},
	{ PRIM_ENUM, -1, "Enumerated type"},
	{ PRIM_ENCR, -1, "Encrypted"},
	{ CONS_SEQ, -1, "Sequence/Sequence Of"},
	{ CONS_SET, -1, "Set/Set Of"},
	{ DEFN_NUMS, -1, "Numeric String"},
	{ DEFN_PRTS, -1, "Printable String"},
	{ DEFN_T61S, -1, "T.61 String"},
	{ DEFN_VTXS, -1, "Videotex String"},
	{ DEFN_IA5S, -1, "IA5 String"},
	{ DEFN_UTCT, -1, "UTCTime"},
	{ DEFN_GENT, -1, "Generalized Time"},
	{ DEFN_GFXS, -1, "Graphics string (ISO2375)"},
	{ DEFN_VISS, -1, "Visible string"},
	{ DEFN_GENS, -1, "General string"},
	{ DEFN_CHRS, -1, "Character string"},
	{ -1, -1, 0}
	};

#ifdef KRB5
struct typestring_table krb5_types[] = {
	{ 1, -1, "Krb5 Ticket"},
	{ 2, -1, "Krb5 Autenticator"},
	{ 3, -1, "Krb5 Encrypted ticket part"},
	{ 10, -1, "Krb5 AS-REQ packet"},
	{ 11, -1, "Krb5 AS-REP packet"},
	{ 12, -1, "Krb5 TGS-REQ packet"},
	{ 13, -1, "Krb5 TGS-REP packet"},
	{ 14, -1, "Krb5 AP-REQ packet"},
	{ 15, -1, "Krb5 AP-REP packet"},
	{ 20, -1, "Krb5 SAFE packet"},
	{ 21, -1, "Krb5 PRIV packet"},
	{ 22, -1, "Krb5 CRED packet"},
	{ 30, -1, "Krb5 ERROR packet"},
	{ 25, -1, "Krb5 Encrypted AS-REP part"},
	{ 26, -1, "Krb5 Encrypted TGS-REP part"},
	{ 27, -1, "Krb5 Encrypted AP-REP part"},
	{ 28, -1, "Krb5 Encrypted PRIV part"},
	{ 29, -1, "Krb5 Encrypted CRED part"},
	{ -1, -1, 0}
};

struct typestring_table krb5_fields[] = {
	{ 1000, 0, "name-type"}, /* PrincipalName */
	{ 1000, 1, "name-string"},

	{ 1001, 0, "etype"},	/* Encrypted data */
	{ 1001, 1, "kvno"},	
	{ 1001, 2, "cipher"},

	{ 1002, 0, "addr-type"},	/* HostAddress */
	{ 1002, 1, "address"},	

	{ 1003, 0, "addr-type"},	/* HostAddresses */
	{ 1003, 1, "address"},	

	{ 1004, 0, "ad-type"},	/* AuthorizationData */
	{ 1004, 1, "ad-data"},	

	{ 1005, 0, "keytype"},	/* EncryptionKey */
	{ 1005, 1, "keyvalue"},	

	{ 1006, 0, "cksumtype"},	/* Checksum */
	{ 1006, 1, "checksum"},

	{ 1007, 0, "kdc-options"},	/* KDC-REQ-BODY */
	{ 1007, 1, "cname", 1000},	
	{ 1007, 2, "realm"},
	{ 1007, 3, "sname", 1000},	
	{ 1007, 4, "from"},
	{ 1007, 5, "till"},	
	{ 1007, 6, "rtime"},
	{ 1007, 7, "nonce"},
	{ 1007, 8, "etype"},
	{ 1007, 9, "addresses", 1003},
	{ 1007, 10, "enc-authorization-data", 1001},
	{ 1007, 11, "additional-tickets"},

	{ 1008, 1, "padata-type"},	/* PA-DATA */
	{ 1008, 2, "pa-data"},

	{ 1009, 0, "user-data"},	/* KRB-SAFE-BODY */
	{ 1009, 1, "timestamp"},	
	{ 1009, 2, "usec"},
	{ 1009, 3, "seq-number"},	
	{ 1009, 4, "s-address", 1002},
	{ 1009, 5, "r-address", 1002},

	{ 1010, 0, "lr-type"},	/* LastReq */
	{ 1010, 1, "lr-value"},

	{ 1011, 0, "key", 1005},	/* KRB-CRED-INFO */
	{ 1011, 1, "prealm"},	
	{ 1011, 2, "pname", 1000},
	{ 1011, 3, "flags"},	
	{ 1011, 4, "authtime"},
	{ 1011, 5, "startime"},	
	{ 1011, 6, "endtime"},
	{ 1011, 7, "renew-till"},
	{ 1011, 8, "srealm"},
	{ 1011, 9, "sname", 1000},
	{ 1011, 10, "caddr", 1002},

	{ 1, 0, "tkt-vno"},	/* Ticket */
	{ 1, 1, "realm"},
	{ 1, 2, "sname", 1000},
	{ 1, 3, "tkt-enc-part", 1001},

	{ 2, 0, "authenticator-vno"}, /* Authenticator */
	{ 2, 1, "crealm"},
	{ 2, 2, "cname", 1000},
	{ 2, 3, "cksum", 1006},
	{ 2, 4, "cusec"},
	{ 2, 5, "ctime"},
	{ 2, 6, "subkey", 1005},
	{ 2, 7, "seq-number"},
	{ 2, 8, "authorization-data", 1004},

	{ 3, 0, "flags"}, /* EncTicketPart */
	{ 3, 1, "key", 1005},
	{ 3, 2, "crealm"},
	{ 3, 3, "cname", 1000},
	{ 3, 4, "transited"},
	{ 3, 5, "authtime"},
	{ 3, 6, "starttime"},
	{ 3, 7, "endtime"},
	{ 3, 8, "renew-till"},
	{ 3, 9, "caddr", 1003},
	{ 3, 10, "authorization-data", 1004},

	{ 10, 1, "pvno"},	/* AS-REQ */
	{ 10, 2, "msg-type"},
	{ 10, 3, "padata", 1008},
	{ 10, 4, "req-body", 1007},

	{ 11, 0, "pvno"},	/* AS-REP */
	{ 11, 1, "msg-type"},
	{ 11, 2, "padata", 1008},
	{ 11, 3, "crealm"},
	{ 11, 4, "cname", 1000},
	{ 11, 5, "ticket"},
	{ 11, 6, "enc-part", 1001},

	{ 12, 1, "pvno"},	/* TGS-REQ */
	{ 12, 2, "msg-type"},
	{ 12, 3, "padata", 1008},
	{ 12, 4, "req-body", 1007},

	{ 13, 0, "pvno"},	/* TGS-REP */
	{ 13, 1, "msg-type"},
	{ 13, 2, "padata", 1008},
	{ 13, 3, "crealm"},
	{ 13, 4, "cname", 1000},
	{ 13, 5, "ticket"},
	{ 13, 6, "enc-part", 1001},

	{ 14, 0, "pvno"},	/* AP-REQ */
	{ 14, 1, "msg-type"},
	{ 14, 2, "ap-options"},
	{ 14, 3, "ticket"},
	{ 14, 4, "authenticator", 1001},

	{ 15, 0, "pvno"},	/* AP-REP */
	{ 15, 1, "msg-type"},
	{ 15, 2, "enc-part", 1001},
	
	{ 20, 0, "pvno"},	/* KRB-SAFE */
	{ 20, 1, "msg-type"},
	{ 20, 2, "safe-body", 1009},
	{ 20, 3, "cksum", 1006},

	{ 21, 0, "pvno"},	/* KRB-PRIV */
	{ 21, 1, "msg-type"},
	{ 21, 2, "enc-part", 1001},

	{ 22, 0, "pvno"},	/* KRB-CRED */
	{ 22, 1, "msg-type"},
	{ 22, 2, "tickets"},
	{ 22, 3, "enc-part", 1001},

	{ 25, 0, "key", 1005},	/* EncASRepPart */
	{ 25, 1, "last-req", 1010},
	{ 25, 2, "nonce"},
	{ 25, 3, "key-expiration"},
	{ 25, 4, "flags"},
	{ 25, 5, "authtime"},
	{ 25, 6, "starttime"},
	{ 25, 7, "enddtime"},
	{ 25, 8, "renew-till"},
	{ 25, 9, "srealm"},
	{ 25, 10, "sname", 1000},
	{ 25, 11, "caddr", 1003},
	
	{ 26, 0, "key", 1005},	/* EncTGSRepPart */
	{ 26, 1, "last-req", 1010},
	{ 26, 2, "nonce"},
	{ 26, 3, "key-expiration"},
	{ 26, 4, "flags"},
	{ 26, 5, "authtime"},
	{ 26, 6, "starttime"},
	{ 26, 7, "enddtime"},
	{ 26, 8, "renew-till"},
	{ 26, 9, "srealm"},
	{ 26, 10, "sname", 1000},
	{ 26, 11, "caddr", 1003},
	
	{ 27, 0, "ctime"},	/* EncApRepPart */
	{ 27, 1, "cusec"},
	{ 27, 2, "subkey", 1005},
	{ 27, 3, "seq-number"},

	{ 28, 0, "user-data"},	/* EncKrbPrivPart */
	{ 28, 1, "timestamp"},
	{ 28, 2, "usec"},
	{ 28, 3, "seq-number"},
	{ 28, 4, "s-address", 1002},
	{ 28, 5, "r-address", 1002},

	{ 29, 0, "ticket-info", 1011},	/* EncKrbCredPart */
	{ 29, 1, "nonce"},
	{ 29, 2, "timestamp"},
	{ 29, 3, "usec"},
	{ 29, 4, "s-address", 1002},
	{ 29, 5, "r-address", 1002},

	{ 30, 0, "pvno"},	/* KRB-ERROR */
	{ 30, 1, "msg-type"},
	{ 30, 2, "ctime"},
	{ 30, 3, "cusec"},
	{ 30, 4, "stime"},
	{ 30, 5, "susec"},
	{ 30, 6, "error-code"},
	{ 30, 7, "crealm"},
	{ 30, 8, "cname", 1000},
	{ 30, 9, "realm"},
	{ 30, 10, "sname", 1000},
	{ 30, 11, "e-text"},
	{ 30, 12, "e-data"},
	
	{ -1, -1, 0}
};
#endif

void print_tag_type(fp, eid, lev)
        FILE *fp;
        int     eid;
        int     lev;
{
	int	tag = eid & ID_TAG;
	int	do_space = 1;
	char	*str;

	fprintf(fp, "[");
	
	switch(eid & ID_CLASS) {
	case CLASS_UNIV:
		if (print_types && print_skip_tagnum)
			do_space = 0;
		else
			fprintf(fp, "UNIV %d", tag);
		break;
	case CLASS_APPL:
		current_appl_type = tag;
#ifdef KRB5
		if (print_krb5_types) {
			str = lookup_typestring(krb5_types, tag, -1);
			if (str) {
				fputs(str, fp);
				break;
			}
		}
#endif
		fprintf(fp, "APPL %d", tag);
		break;
	case CLASS_CONT:
#ifdef KRB5
		if (print_krb5_types && current_appl_type) {
			str = lookup_typestring(krb5_fields,
						current_appl_type, tag);
			if (str) {
				fputs(str, fp);
				break;
			}
		}
#endif
		if (print_skip_context && lev)
			fprintf(fp, "%d", tag);
		else
			fprintf(fp, "CONT %d", tag);
		break;
	case CLASS_PRIV:
		fprintf(fp, "PRIV %d", tag);
		break;
	}
	
	if (print_types && ((eid & ID_CLASS) == CLASS_UNIV)) {
		if (do_space)
			fputs(" ", fp);
		str = lookup_typestring(univ_types, eid & ID_TAG, -1);
		if (str)
			fputs(str, fp);
		else
			fprintf(fp, "UNIV %d???", eid & ID_TAG);
	}
	
	fprintf(fp, "] ");
	
}	

/*****************************************************************************/