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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34 #include "kadmin_locl.h"
35 #include <parse_units.h>
37 RCSID("$Id: util.c 21745 2007-07-31 16:11:25Z lha $");
40 * util.c - functions for parsing, unparsing, and editing different
41 * types of data used in kadmin.
45 get_response(const char *prompt, const char *def, char *buf, size_t len);
51 struct units kdb_attrs[] = {
52 { "allow-digest", KRB5_KDB_ALLOW_DIGEST },
53 { "allow-kerberos4", KRB5_KDB_ALLOW_KERBEROS4 },
54 { "trusted-for-delegation", KRB5_KDB_TRUSTED_FOR_DELEGATION },
55 { "ok-as-delegate", KRB5_KDB_OK_AS_DELEGATE },
56 { "new-princ", KRB5_KDB_NEW_PRINC },
57 { "support-desmd5", KRB5_KDB_SUPPORT_DESMD5 },
58 { "pwchange-service", KRB5_KDB_PWCHANGE_SERVICE },
59 { "disallow-svr", KRB5_KDB_DISALLOW_SVR },
60 { "requires-pw-change", KRB5_KDB_REQUIRES_PWCHANGE },
61 { "requires-hw-auth", KRB5_KDB_REQUIRES_HW_AUTH },
62 { "requires-pre-auth", KRB5_KDB_REQUIRES_PRE_AUTH },
63 { "disallow-all-tix", KRB5_KDB_DISALLOW_ALL_TIX },
64 { "disallow-dup-skey", KRB5_KDB_DISALLOW_DUP_SKEY },
65 { "disallow-proxiable", KRB5_KDB_DISALLOW_PROXIABLE },
66 { "disallow-renewable", KRB5_KDB_DISALLOW_RENEWABLE },
67 { "disallow-tgt-based", KRB5_KDB_DISALLOW_TGT_BASED },
68 { "disallow-forwardable", KRB5_KDB_DISALLOW_FORWARDABLE },
69 { "disallow-postdated", KRB5_KDB_DISALLOW_POSTDATED },
74 * convert the attributes in `attributes' into a printable string
79 attributes2str(krb5_flags attributes, char *str, size_t len)
81 unparse_flags (attributes, kdb_attrs, str, len);
85 * convert the string in `str' into attributes in `flags'
86 * return 0 if parsed ok, else -1.
90 str2attributes(const char *str, krb5_flags *flags)
94 res = parse_flags (str, kdb_attrs, *flags);
104 * try to parse the string `resp' into attributes in `attr', also
105 * setting the `bit' in `mask' if attributes are given and valid.
109 parse_attributes (const char *resp, krb5_flags *attr, int *mask, int bit)
111 krb5_flags tmp = *attr;
113 if (str2attributes(resp, &tmp) == 0) {
118 } else if(*resp == '?') {
119 print_flags_table (kdb_attrs, stderr);
121 fprintf (stderr, "Unable to parse \"%s\"\n", resp);
127 * allow the user to edit the attributes in `attr', prompting with `prompt'
131 edit_attributes (const char *prompt, krb5_flags *attr, int *mask, int bit)
133 char buf[1024], resp[1024];
135 if (mask && (*mask & bit))
138 attributes2str(*attr, buf, sizeof(buf));
140 if(get_response("Attributes", buf, resp, sizeof(resp)) != 0)
144 if (parse_attributes (resp, attr, mask, bit) == 0)
152 * the special value 0 means ``never''
156 * Convert the time `t' to a string representation in `str' (of max
157 * size `len'). If include_time also include time, otherwise just
162 time_t2str(time_t t, char *str, size_t len, int include_time)
166 strftime(str, len, "%Y-%m-%d %H:%M:%S UTC", gmtime(&t));
168 strftime(str, len, "%Y-%m-%d", gmtime(&t));
170 snprintf(str, len, "never");
174 * Convert the time representation in `str' to a time in `time'.
175 * Return 0 if succesful, else -1.
179 str2time_t (const char *str, time_t *t)
184 memset (&tm, 0, sizeof (tm));
185 memset (&tm2, 0, sizeof (tm2));
187 if(strcasecmp(str, "never") == 0) {
192 if(strcasecmp(str, "now") == 0) {
197 p = strptime (str, "%Y-%m-%d", &tm);
202 while(isspace((unsigned char)*p))
205 /* XXX this is really a bit optimistic, we should really complain
206 if there was a problem parsing the time */
207 if(p[0] != '\0' && strptime (p, "%H:%M:%S", &tm2) != NULL) {
208 tm.tm_hour = tm2.tm_hour;
209 tm.tm_min = tm2.tm_min;
210 tm.tm_sec = tm2.tm_sec;
212 /* Do it on the end of the day */
218 *t = tm2time (tm, 0);
223 * try to parse the time in `resp' storing it in `value'
227 parse_timet (const char *resp, krb5_timestamp *value, int *mask, int bit)
231 if (str2time_t(resp, &tmp) == 0) {
238 fprintf (stderr, "Unable to parse time \"%s\"\n", resp);
239 fprintf (stderr, "Print date on format YYYY-mm-dd [hh:mm:ss]\n");
244 * allow the user to edit the time in `value'
248 edit_timet (const char *prompt, krb5_timestamp *value, int *mask, int bit)
250 char buf[1024], resp[1024];
252 if (mask && (*mask & bit))
255 time_t2str (*value, buf, sizeof (buf), 0);
258 if(get_response(prompt, buf, resp, sizeof(resp)) != 0)
260 if (parse_timet (resp, value, mask, bit) == 0)
268 * the special value 0 means ``unlimited''
272 * convert the delta_t value in `t' into a printable form in `str, len'
276 deltat2str(unsigned t, char *str, size_t len)
278 if(t == 0 || t == INT_MAX)
279 snprintf(str, len, "unlimited");
281 unparse_time(t, str, len);
285 * parse the delta value in `str', storing result in `*delta'
286 * return 0 if ok, else -1
290 str2deltat(const char *str, krb5_deltat *delta)
294 if(strcasecmp(str, "unlimited") == 0) {
298 res = parse_time(str, "day");
308 * try to parse the string in `resp' into a deltad in `value'
309 * `mask' will get the bit `bit' set if a value was given.
313 parse_deltat (const char *resp, krb5_deltat *value, int *mask, int bit)
317 if (str2deltat(resp, &tmp) == 0) {
322 } else if(*resp == '?') {
323 print_time_table (stderr);
325 fprintf (stderr, "Unable to parse time \"%s\"\n", resp);
331 * allow the user to edit the deltat in `value'
335 edit_deltat (const char *prompt, krb5_deltat *value, int *mask, int bit)
337 char buf[1024], resp[1024];
339 if (mask && (*mask & bit))
342 deltat2str(*value, buf, sizeof(buf));
344 if(get_response(prompt, buf, resp, sizeof(resp)) != 0)
346 if (parse_deltat (resp, value, mask, bit) == 0)
353 * allow the user to edit `ent'
357 set_defaults(kadm5_principal_ent_t ent, int *mask,
358 kadm5_principal_ent_t default_ent, int default_mask)
361 && (default_mask & KADM5_MAX_LIFE)
362 && !(*mask & KADM5_MAX_LIFE))
363 ent->max_life = default_ent->max_life;
366 && (default_mask & KADM5_MAX_RLIFE)
367 && !(*mask & KADM5_MAX_RLIFE))
368 ent->max_renewable_life = default_ent->max_renewable_life;
371 && (default_mask & KADM5_PRINC_EXPIRE_TIME)
372 && !(*mask & KADM5_PRINC_EXPIRE_TIME))
373 ent->princ_expire_time = default_ent->princ_expire_time;
376 && (default_mask & KADM5_PW_EXPIRATION)
377 && !(*mask & KADM5_PW_EXPIRATION))
378 ent->pw_expiration = default_ent->pw_expiration;
381 && (default_mask & KADM5_ATTRIBUTES)
382 && !(*mask & KADM5_ATTRIBUTES))
383 ent->attributes = default_ent->attributes & ~KRB5_KDB_DISALLOW_ALL_TIX;
387 edit_entry(kadm5_principal_ent_t ent, int *mask,
388 kadm5_principal_ent_t default_ent, int default_mask)
391 set_defaults(ent, mask, default_ent, default_mask);
393 if(edit_deltat ("Max ticket life", &ent->max_life, mask,
394 KADM5_MAX_LIFE) != 0)
397 if(edit_deltat ("Max renewable life", &ent->max_renewable_life, mask,
398 KADM5_MAX_RLIFE) != 0)
401 if(edit_timet ("Principal expiration time", &ent->princ_expire_time, mask,
402 KADM5_PRINC_EXPIRE_TIME) != 0)
405 if(edit_timet ("Password expiration time", &ent->pw_expiration, mask,
406 KADM5_PW_EXPIRATION) != 0)
409 if(edit_attributes ("Attributes", &ent->attributes, mask,
410 KADM5_ATTRIBUTES) != 0)
417 * Parse the arguments, set the fields in `ent' and the `mask' for the
418 * entries having been set.
419 * Return 1 on failure and 0 on success.
423 set_entry(krb5_context context,
424 kadm5_principal_ent_t ent,
426 const char *max_ticket_life,
427 const char *max_renewable_life,
428 const char *expiration,
429 const char *pw_expiration,
430 const char *attributes)
432 if (max_ticket_life != NULL) {
433 if (parse_deltat (max_ticket_life, &ent->max_life,
434 mask, KADM5_MAX_LIFE)) {
435 krb5_warnx (context, "unable to parse `%s'", max_ticket_life);
439 if (max_renewable_life != NULL) {
440 if (parse_deltat (max_renewable_life, &ent->max_renewable_life,
441 mask, KADM5_MAX_RLIFE)) {
442 krb5_warnx (context, "unable to parse `%s'", max_renewable_life);
448 if (parse_timet (expiration, &ent->princ_expire_time,
449 mask, KADM5_PRINC_EXPIRE_TIME)) {
450 krb5_warnx (context, "unable to parse `%s'", expiration);
455 if (parse_timet (pw_expiration, &ent->pw_expiration,
456 mask, KADM5_PW_EXPIRATION)) {
457 krb5_warnx (context, "unable to parse `%s'", pw_expiration);
461 if (attributes != NULL) {
462 if (parse_attributes (attributes, &ent->attributes,
463 mask, KADM5_ATTRIBUTES)) {
464 krb5_warnx (context, "unable to parse `%s'", attributes);
472 * Does `string' contain any globing characters?
476 is_expression(const char *string)
481 for(p = string; *p; p++) {
488 else if(strchr("[]*?", *p) != NULL)
495 * Loop over all principals matching exp. If any of calls to `func'
496 * failes, the first error is returned when all principals are
500 foreach_principal(const char *exp_str,
501 int (*func)(krb5_principal, void*),
502 const char *funcname,
508 krb5_error_code saved_ret = 0, ret = 0;
509 krb5_principal princ_ent;
512 /* if this isn't an expression, there is no point in wading
513 through the whole database looking for matches */
514 is_expr = is_expression(exp_str);
516 ret = kadm5_get_principals(kadm_handle, exp_str, &princs, &num_princs);
517 if(!is_expr || ret == KADM5_AUTH_LIST) {
518 /* we might be able to perform the requested opreration even
519 if we're not allowed to list principals */
521 princs = malloc(sizeof(*princs));
524 princs[0] = strdup(exp_str);
525 if(princs[0] == NULL){
530 krb5_warn(context, ret, "kadm5_get_principals");
533 for(i = 0; i < num_princs; i++) {
534 ret = krb5_parse_name(context, princs[i], &princ_ent);
536 krb5_warn(context, ret, "krb5_parse_name(%s)", princs[i]);
539 ret = (*func)(princ_ent, data);
541 krb5_clear_error_string(context);
542 krb5_warn(context, ret, "%s %s", funcname, princs[i]);
546 krb5_free_principal(context, princ_ent);
548 if (ret == 0 && saved_ret != 0)
550 kadm5_free_name_list(kadm_handle, princs, &num_princs);
555 * prompt with `prompt' and default value `def', and store the reply
561 static jmp_buf jmpbuf;
570 get_response(const char *prompt, const char *def, char *buf, size_t len)
575 osig = signal(SIGINT, interrupt);
577 signal(SIGINT, osig);
578 fprintf(stderr, "\n");
582 fprintf(stderr, "%s [%s]:", prompt, def);
583 if(fgets(buf, len, stdin) == NULL) {
584 int save_errno = errno;
586 krb5_err(context, 1, save_errno, "<stdin>");
587 signal(SIGINT, osig);
590 p = strchr(buf, '\n');
593 if(strcmp(buf, "") == 0)
594 strlcpy(buf, def, len);
595 signal(SIGINT, osig);
600 * return [0, 16) or -1
606 static char hexdigits[] = "0123456789abcdef";
609 p = strchr (hexdigits, tolower((unsigned char)c));
613 return p - hexdigits;
617 * convert a key in a readable format into a keyblock.
618 * return 0 iff succesful, otherwise `err' should point to an error message
622 parse_des_key (const char *key_string, krb5_key_data *key_data,
625 const char *p = key_string;
626 unsigned char bits[8];
629 if (strlen (key_string) != 16) {
630 *error = "bad length, should be 16 for DES key";
633 for (i = 0; i < 8; ++i) {
636 d1 = hex2n(p[2 * i]);
637 d2 = hex2n(p[2 * i + 1]);
638 if (d1 < 0 || d2 < 0) {
639 *error = "non-hex character";
642 bits[i] = (d1 << 4) | d2;
644 for (i = 0; i < 3; ++i) {
645 key_data[i].key_data_ver = 2;
646 key_data[i].key_data_kvno = 0;
648 key_data[i].key_data_type[0] = ETYPE_DES_CBC_CRC;
649 key_data[i].key_data_length[0] = 8;
650 key_data[i].key_data_contents[0] = malloc(8);
651 if (key_data[i].key_data_contents[0] == NULL) {
655 memcpy (key_data[i].key_data_contents[0], bits, 8);
657 key_data[i].key_data_type[1] = KRB5_PW_SALT;
658 key_data[i].key_data_length[1] = 0;
659 key_data[i].key_data_contents[1] = NULL;
661 key_data[0].key_data_type[0] = ETYPE_DES_CBC_MD5;
662 key_data[1].key_data_type[0] = ETYPE_DES_CBC_MD4;