Home | History | Annotate | Download | only in common
      1 /*
      2  * Copyright (c) 1999 Dug Song.  All rights reserved.
      3  * Copyright (c) 2002 Markus Friedl.  All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  *
     14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     15  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     16  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     17  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     18  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     19  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     20  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     21  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     23  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #include "includes.h"
     27 #include "uuencode.h"
     28 
     29 RCSID("$OpenBSD: radix.c,v 1.22 2002/09/09 14:54:15 markus Exp $");
     30 
     31 #pragma ident	"%Z%%M%	%I%	%E% SMI"
     32 
     33 #ifdef AFS
     34 #include <krb.h>
     35 
     36 #include <radix.h>
     37 #include "bufaux.h"
     38 
     39 int
     40 creds_to_radix(CREDENTIALS *creds, u_char *buf, size_t buflen)
     41 {
     42 	Buffer b;
     43 	int ret;
     44 
     45 	buffer_init(&b);
     46 
     47 	buffer_put_char(&b, 1);	/* version */
     48 
     49 	buffer_append(&b, creds->service, strlen(creds->service));
     50 	buffer_put_char(&b, '\0');
     51 	buffer_append(&b, creds->instance, strlen(creds->instance));
     52 	buffer_put_char(&b, '\0');
     53 	buffer_append(&b, creds->realm, strlen(creds->realm));
     54 	buffer_put_char(&b, '\0');
     55 	buffer_append(&b, creds->pname, strlen(creds->pname));
     56 	buffer_put_char(&b, '\0');
     57 	buffer_append(&b, creds->pinst, strlen(creds->pinst));
     58 	buffer_put_char(&b, '\0');
     59 
     60 	/* Null string to repeat the realm. */
     61 	buffer_put_char(&b, '\0');
     62 
     63 	buffer_put_int(&b, creds->issue_date);
     64 	buffer_put_int(&b, krb_life_to_time(creds->issue_date,
     65 	    creds->lifetime));
     66 	buffer_append(&b, creds->session, sizeof(creds->session));
     67 	buffer_put_short(&b, creds->kvno);
     68 
     69 	/* 32 bit size + data */
     70 	buffer_put_string(&b, creds->ticket_st.dat, creds->ticket_st.length);
     71 
     72 	ret = uuencode(buffer_ptr(&b), buffer_len(&b), (char *)buf, buflen);
     73 
     74 	buffer_free(&b);
     75 	return ret;
     76 }
     77 
     78 #define GETSTRING(b, t, tlen) \
     79 	do { \
     80 		int i, found = 0; \
     81 		for (i = 0; i < tlen; i++) { \
     82 			if (buffer_len(b) == 0) \
     83 				goto done; \
     84 			t[i] = buffer_get_char(b); \
     85 			if (t[i] == '\0') { \
     86 				found = 1; \
     87 				break; \
     88 			} \
     89 		} \
     90 		if (!found) \
     91 			goto done; \
     92 	} while(0)
     93 
     94 int
     95 radix_to_creds(const char *buf, CREDENTIALS *creds)
     96 {
     97 	Buffer b;
     98 	u_char *space;
     99 	char c, version, *p;
    100 	u_int endTime, len;
    101 	int blen, ret;
    102 
    103 	ret = 0;
    104 	blen = strlen(buf);
    105 
    106 	/* sanity check for size */
    107 	if (blen > 8192)
    108 		return 0;
    109 
    110 	buffer_init(&b);
    111 	space = buffer_append_space(&b, blen);
    112 
    113 	/* check version and length! */
    114 	len = uudecode(buf, space, blen);
    115 	if (len < 1)
    116 		goto done;
    117 
    118 	version = buffer_get_char(&b);
    119 
    120 	GETSTRING(&b, creds->service, sizeof creds->service);
    121 	GETSTRING(&b, creds->instance, sizeof creds->instance);
    122 	GETSTRING(&b, creds->realm, sizeof creds->realm);
    123 	GETSTRING(&b, creds->pname, sizeof creds->pname);
    124 	GETSTRING(&b, creds->pinst, sizeof creds->pinst);
    125 
    126 	if (buffer_len(&b) == 0)
    127 		goto done;
    128 
    129 	/* Ignore possibly different realm. */
    130 	while (buffer_len(&b) > 0 && (c = buffer_get_char(&b)) != '\0')
    131 		;
    132 
    133 	if (buffer_len(&b) == 0)
    134 		goto done;
    135 
    136 	creds->issue_date = buffer_get_int(&b);
    137 
    138 	endTime = buffer_get_int(&b);
    139 	creds->lifetime = krb_time_to_life(creds->issue_date, endTime);
    140 
    141 	len = buffer_len(&b);
    142 	if (len < sizeof(creds->session))
    143 		goto done;
    144 	memcpy(&creds->session, buffer_ptr(&b), sizeof(creds->session));
    145 	buffer_consume(&b, sizeof(creds->session));
    146 
    147 	creds->kvno = buffer_get_short(&b);
    148 
    149 	p = buffer_get_string(&b, &len);
    150 	if (len < 0 || len > sizeof(creds->ticket_st.dat))
    151 		goto done;
    152 	memcpy(&creds->ticket_st.dat, p, len);
    153 	creds->ticket_st.length = len;
    154 
    155 	ret = 1;
    156 done:
    157 	buffer_free(&b);
    158 	return ret;
    159 }
    160 #endif /* AFS */
    161