2 * Copyright (c) 1997 - 2006 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
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7 * modification, are permitted provided that the following conditions
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11 * notice, this list of conditions and the following disclaimer.
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14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
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18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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34 #include "kadmin_locl.h"
35 #include <parse_units.h>
38 * util.c - functions for parsing, unparsing, and editing different
39 * types of data used in kadmin.
43 get_response(const char *prompt, const char *def, char *buf, size_t len);
49 struct units kdb_attrs[] = {
50 { "allow-digest", KRB5_KDB_ALLOW_DIGEST },
51 { "allow-kerberos4", KRB5_KDB_ALLOW_KERBEROS4 },
52 { "trusted-for-delegation", KRB5_KDB_TRUSTED_FOR_DELEGATION },
53 { "ok-as-delegate", KRB5_KDB_OK_AS_DELEGATE },
54 { "new-princ", KRB5_KDB_NEW_PRINC },
55 { "support-desmd5", KRB5_KDB_SUPPORT_DESMD5 },
56 { "pwchange-service", KRB5_KDB_PWCHANGE_SERVICE },
57 { "disallow-svr", KRB5_KDB_DISALLOW_SVR },
58 { "requires-pw-change", KRB5_KDB_REQUIRES_PWCHANGE },
59 { "requires-hw-auth", KRB5_KDB_REQUIRES_HW_AUTH },
60 { "requires-pre-auth", KRB5_KDB_REQUIRES_PRE_AUTH },
61 { "disallow-all-tix", KRB5_KDB_DISALLOW_ALL_TIX },
62 { "disallow-dup-skey", KRB5_KDB_DISALLOW_DUP_SKEY },
63 { "disallow-proxiable", KRB5_KDB_DISALLOW_PROXIABLE },
64 { "disallow-renewable", KRB5_KDB_DISALLOW_RENEWABLE },
65 { "disallow-tgt-based", KRB5_KDB_DISALLOW_TGT_BASED },
66 { "disallow-forwardable", KRB5_KDB_DISALLOW_FORWARDABLE },
67 { "disallow-postdated", KRB5_KDB_DISALLOW_POSTDATED },
72 * convert the attributes in `attributes' into a printable string
77 attributes2str(krb5_flags attributes, char *str, size_t len)
79 unparse_flags (attributes, kdb_attrs, str, len);
83 * convert the string in `str' into attributes in `flags'
84 * return 0 if parsed ok, else -1.
88 str2attributes(const char *str, krb5_flags *flags)
92 res = parse_flags (str, kdb_attrs, *flags);
102 * try to parse the string `resp' into attributes in `attr', also
103 * setting the `bit' in `mask' if attributes are given and valid.
107 parse_attributes (const char *resp, krb5_flags *attr, int *mask, int bit)
109 krb5_flags tmp = *attr;
111 if (str2attributes(resp, &tmp) == 0) {
116 } else if(*resp == '?') {
117 print_flags_table (kdb_attrs, stderr);
119 fprintf (stderr, "Unable to parse \"%s\"\n", resp);
125 * allow the user to edit the attributes in `attr', prompting with `prompt'
129 edit_attributes (const char *prompt, krb5_flags *attr, int *mask, int bit)
131 char buf[1024], resp[1024];
133 if (mask && (*mask & bit))
136 attributes2str(*attr, buf, sizeof(buf));
138 if(get_response("Attributes", buf, resp, sizeof(resp)) != 0)
142 if (parse_attributes (resp, attr, mask, bit) == 0)
150 * the special value 0 means ``never''
154 * Convert the time `t' to a string representation in `str' (of max
155 * size `len'). If include_time also include time, otherwise just
160 time_t2str(time_t t, char *str, size_t len, int include_time)
164 strftime(str, len, "%Y-%m-%d %H:%M:%S UTC", gmtime(&t));
166 strftime(str, len, "%Y-%m-%d", gmtime(&t));
168 snprintf(str, len, "never");
172 * Convert the time representation in `str' to a time in `time'.
173 * Return 0 if succesful, else -1.
177 str2time_t (const char *str, time_t *t)
182 memset (&tm, 0, sizeof (tm));
183 memset (&tm2, 0, sizeof (tm2));
185 while(isspace((unsigned char)*str))
190 *t = parse_time(str, "month");
197 if(strcasecmp(str, "never") == 0) {
202 if(strcasecmp(str, "now") == 0) {
207 p = strptime (str, "%Y-%m-%d", &tm);
212 while(isspace((unsigned char)*p))
215 /* XXX this is really a bit optimistic, we should really complain
216 if there was a problem parsing the time */
217 if(p[0] != '\0' && strptime (p, "%H:%M:%S", &tm2) != NULL) {
218 tm.tm_hour = tm2.tm_hour;
219 tm.tm_min = tm2.tm_min;
220 tm.tm_sec = tm2.tm_sec;
222 /* Do it on the end of the day */
228 *t = tm2time (tm, 0);
233 * try to parse the time in `resp' storing it in `value'
237 parse_timet (const char *resp, krb5_timestamp *value, int *mask, int bit)
241 if (str2time_t(resp, &tmp) == 0) {
248 fprintf (stderr, "Unable to parse time \"%s\"\n", resp);
249 fprintf (stderr, "Print date on format YYYY-mm-dd [hh:mm:ss]\n");
254 * allow the user to edit the time in `value'
258 edit_timet (const char *prompt, krb5_timestamp *value, int *mask, int bit)
260 char buf[1024], resp[1024];
262 if (mask && (*mask & bit))
265 time_t2str (*value, buf, sizeof (buf), 0);
268 if(get_response(prompt, buf, resp, sizeof(resp)) != 0)
270 if (parse_timet (resp, value, mask, bit) == 0)
278 * the special value 0 means ``unlimited''
282 * convert the delta_t value in `t' into a printable form in `str, len'
286 deltat2str(unsigned t, char *str, size_t len)
288 if(t == 0 || t == INT_MAX)
289 snprintf(str, len, "unlimited");
291 unparse_time(t, str, len);
295 * parse the delta value in `str', storing result in `*delta'
296 * return 0 if ok, else -1
300 str2deltat(const char *str, krb5_deltat *delta)
304 if(strcasecmp(str, "unlimited") == 0) {
308 res = parse_time(str, "day");
318 * try to parse the string in `resp' into a deltad in `value'
319 * `mask' will get the bit `bit' set if a value was given.
323 parse_deltat (const char *resp, krb5_deltat *value, int *mask, int bit)
327 if (str2deltat(resp, &tmp) == 0) {
332 } else if(*resp == '?') {
333 print_time_table (stderr);
335 fprintf (stderr, "Unable to parse time \"%s\"\n", resp);
341 * allow the user to edit the deltat in `value'
345 edit_deltat (const char *prompt, krb5_deltat *value, int *mask, int bit)
347 char buf[1024], resp[1024];
349 if (mask && (*mask & bit))
352 deltat2str(*value, buf, sizeof(buf));
354 if(get_response(prompt, buf, resp, sizeof(resp)) != 0)
356 if (parse_deltat (resp, value, mask, bit) == 0)
363 * allow the user to edit `ent'
367 set_defaults(kadm5_principal_ent_t ent, int *mask,
368 kadm5_principal_ent_t default_ent, int default_mask)
371 && (default_mask & KADM5_MAX_LIFE)
372 && !(*mask & KADM5_MAX_LIFE))
373 ent->max_life = default_ent->max_life;
376 && (default_mask & KADM5_MAX_RLIFE)
377 && !(*mask & KADM5_MAX_RLIFE))
378 ent->max_renewable_life = default_ent->max_renewable_life;
381 && (default_mask & KADM5_PRINC_EXPIRE_TIME)
382 && !(*mask & KADM5_PRINC_EXPIRE_TIME))
383 ent->princ_expire_time = default_ent->princ_expire_time;
386 && (default_mask & KADM5_PW_EXPIRATION)
387 && !(*mask & KADM5_PW_EXPIRATION))
388 ent->pw_expiration = default_ent->pw_expiration;
391 && (default_mask & KADM5_ATTRIBUTES)
392 && !(*mask & KADM5_ATTRIBUTES))
393 ent->attributes = default_ent->attributes & ~KRB5_KDB_DISALLOW_ALL_TIX;
397 edit_entry(kadm5_principal_ent_t ent, int *mask,
398 kadm5_principal_ent_t default_ent, int default_mask)
401 set_defaults(ent, mask, default_ent, default_mask);
403 if(edit_deltat ("Max ticket life", &ent->max_life, mask,
404 KADM5_MAX_LIFE) != 0)
407 if(edit_deltat ("Max renewable life", &ent->max_renewable_life, mask,
408 KADM5_MAX_RLIFE) != 0)
411 if(edit_timet ("Principal expiration time", &ent->princ_expire_time, mask,
412 KADM5_PRINC_EXPIRE_TIME) != 0)
415 if(edit_timet ("Password expiration time", &ent->pw_expiration, mask,
416 KADM5_PW_EXPIRATION) != 0)
419 if(edit_attributes ("Attributes", &ent->attributes, mask,
420 KADM5_ATTRIBUTES) != 0)
427 * Parse the arguments, set the fields in `ent' and the `mask' for the
428 * entries having been set.
429 * Return 1 on failure and 0 on success.
433 set_entry(krb5_context contextp,
434 kadm5_principal_ent_t ent,
436 const char *max_ticket_life,
437 const char *max_renewable_life,
438 const char *expiration,
439 const char *pw_expiration,
440 const char *attributes)
442 if (max_ticket_life != NULL) {
443 if (parse_deltat (max_ticket_life, &ent->max_life,
444 mask, KADM5_MAX_LIFE)) {
445 krb5_warnx (contextp, "unable to parse `%s'", max_ticket_life);
449 if (max_renewable_life != NULL) {
450 if (parse_deltat (max_renewable_life, &ent->max_renewable_life,
451 mask, KADM5_MAX_RLIFE)) {
452 krb5_warnx (contextp, "unable to parse `%s'", max_renewable_life);
458 if (parse_timet (expiration, &ent->princ_expire_time,
459 mask, KADM5_PRINC_EXPIRE_TIME)) {
460 krb5_warnx (contextp, "unable to parse `%s'", expiration);
465 if (parse_timet (pw_expiration, &ent->pw_expiration,
466 mask, KADM5_PW_EXPIRATION)) {
467 krb5_warnx (contextp, "unable to parse `%s'", pw_expiration);
471 if (attributes != NULL) {
472 if (parse_attributes (attributes, &ent->attributes,
473 mask, KADM5_ATTRIBUTES)) {
474 krb5_warnx (contextp, "unable to parse `%s'", attributes);
482 * Does `string' contain any globing characters?
486 is_expression(const char *string)
491 for(p = string; *p; p++) {
498 else if(strchr("[]*?", *p) != NULL)
505 * Loop over all principals matching exp. If any of calls to `func'
506 * failes, the first error is returned when all principals are
510 foreach_principal(const char *exp_str,
511 int (*func)(krb5_principal, void*),
512 const char *funcname,
515 char **princs = NULL;
518 krb5_error_code saved_ret = 0, ret = 0;
519 krb5_principal princ_ent;
522 /* if this isn't an expression, there is no point in wading
523 through the whole database looking for matches */
524 is_expr = is_expression(exp_str);
526 ret = kadm5_get_principals(kadm_handle, exp_str, &princs, &num_princs);
527 if(!is_expr || ret == KADM5_AUTH_LIST) {
528 /* we might be able to perform the requested opreration even
529 if we're not allowed to list principals */
531 princs = malloc(sizeof(*princs));
534 princs[0] = strdup(exp_str);
535 if(princs[0] == NULL){
540 krb5_warn(context, ret, "kadm5_get_principals");
543 for(i = 0; i < num_princs; i++) {
544 ret = krb5_parse_name(context, princs[i], &princ_ent);
546 krb5_warn(context, ret, "krb5_parse_name(%s)", princs[i]);
549 ret = (*func)(princ_ent, data);
551 krb5_clear_error_message(context);
552 krb5_warn(context, ret, "%s %s", funcname, princs[i]);
556 krb5_free_principal(context, princ_ent);
558 if (ret == 0 && saved_ret != 0)
560 kadm5_free_name_list(kadm_handle, princs, &num_princs);
565 * prompt with `prompt' and default value `def', and store the reply
571 static jmp_buf jmpbuf;
580 get_response(const char *prompt, const char *def, char *buf, size_t len)
585 osig = signal(SIGINT, interrupt);
587 signal(SIGINT, osig);
588 fprintf(stderr, "\n");
592 fprintf(stderr, "%s [%s]:", prompt, def);
593 if(fgets(buf, len, stdin) == NULL) {
594 int save_errno = errno;
596 krb5_err(context, 1, save_errno, "<stdin>");
597 signal(SIGINT, osig);
600 p = strchr(buf, '\n');
603 if(strcmp(buf, "") == 0)
604 strlcpy(buf, def, len);
605 signal(SIGINT, osig);
610 * return [0, 16) or -1
616 static char hexdigits[] = "0123456789abcdef";
619 p = strchr (hexdigits, tolower((unsigned char)c));
623 return p - hexdigits;
627 * convert a key in a readable format into a keyblock.
628 * return 0 iff succesful, otherwise `err' should point to an error message
632 parse_des_key (const char *key_string, krb5_key_data *key_data,
635 const char *p = key_string;
636 unsigned char bits[8];
639 if (strlen (key_string) != 16) {
640 *error = "bad length, should be 16 for DES key";
643 for (i = 0; i < 8; ++i) {
646 d1 = hex2n(p[2 * i]);
647 d2 = hex2n(p[2 * i + 1]);
648 if (d1 < 0 || d2 < 0) {
649 *error = "non-hex character";
652 bits[i] = (d1 << 4) | d2;
654 for (i = 0; i < 3; ++i) {
655 key_data[i].key_data_ver = 2;
656 key_data[i].key_data_kvno = 0;
658 key_data[i].key_data_type[0] = ETYPE_DES_CBC_CRC;
659 key_data[i].key_data_length[0] = 8;
660 key_data[i].key_data_contents[0] = malloc(8);
661 if (key_data[i].key_data_contents[0] == NULL) {
665 memcpy (key_data[i].key_data_contents[0], bits, 8);
667 key_data[i].key_data_type[1] = KRB5_PW_SALT;
668 key_data[i].key_data_length[1] = 0;
669 key_data[i].key_data_contents[1] = NULL;
671 key_data[0].key_data_type[0] = ETYPE_DES_CBC_MD5;
672 key_data[1].key_data_type[0] = ETYPE_DES_CBC_MD4;