diff options
Diffstat (limited to 'crypto/kerberosIV/lib/krb/getrealm.c')
| -rw-r--r-- | crypto/kerberosIV/lib/krb/getrealm.c | 185 |
1 files changed, 0 insertions, 185 deletions
diff --git a/crypto/kerberosIV/lib/krb/getrealm.c b/crypto/kerberosIV/lib/krb/getrealm.c deleted file mode 100644 index 2dcb4cf33fe9..000000000000 --- a/crypto/kerberosIV/lib/krb/getrealm.c +++ /dev/null @@ -1,185 +0,0 @@ -/* - Copyright (C) 1989 by the Massachusetts Institute of Technology - - Export of this software from the United States of America is assumed - to 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. 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. - - */ - -#include "krb_locl.h" - -RCSID("$Id: getrealm.c,v 1.36 1999/09/16 20:41:51 assar Exp $"); - -#ifndef MATCH_SUBDOMAINS -#define MATCH_SUBDOMAINS 0 -#endif - -/* - * krb_realmofhost. - * Given a fully-qualified domain-style primary host name, - * return the name of the Kerberos realm for the host. - * If the hostname contains no discernable domain, or an error occurs, - * return the local realm name, as supplied by get_krbrlm(). - * If the hostname contains a domain, but no translation is found, - * the hostname's domain is converted to upper-case and returned. - * - * The format of each line of the translation file is: - * domain_name kerberos_realm - * -or- - * host_name kerberos_realm - * - * domain_name should be of the form .XXX.YYY (e.g. .LCS.MIT.EDU) - * host names should be in the usual form (e.g. FOO.BAR.BAZ) - */ - -/* To automagically find the correct realm of a host (without - * krb.realms) add a text record for your domain with the name of your - * realm, like this: - * - * krb4-realm IN TXT FOO.SE - * - * The search is recursive, so you can also add entries for specific - * hosts. To find the realm of host a.b.c, it first tries - * krb4-realm.a.b.c, then krb4-realm.b.c and so on. - */ - -static int -dns_find_realm(char *hostname, char *realm) -{ - char domain[MaxHostNameLen + sizeof("krb4-realm..")]; - char *p; - int level = 0; - struct dns_reply *r; - - p = hostname; - - while(1){ - snprintf(domain, sizeof(domain), "krb4-realm.%s.", p); - p = strchr(p, '.'); - if(p == NULL) - break; - p++; - r = dns_lookup(domain, "TXT"); - if(r){ - struct resource_record *rr = r->head; - while(rr){ - if(rr->type == T_TXT){ - strlcpy(realm, rr->u.txt, REALM_SZ); - dns_free_data(r); - return level; - } - rr = rr->next; - } - dns_free_data(r); - } - level++; - } - return -1; -} - - -static FILE * -open_krb_realms(void) -{ - int i; - char file[MaxPathLen]; - FILE *res; - - for(i = 0; krb_get_krbrealms(i, file, sizeof(file)) == 0; i++) - if ((res = fopen(file, "r")) != NULL) - return res; - return NULL; -} - -static int -file_find_realm(const char *phost, const char *domain, - char *ret_realm, size_t ret_realm_sz) -{ - FILE *trans_file; - char buf[1024]; - int ret = -1; - - if ((trans_file = open_krb_realms()) == NULL) - return -1; - - while (fgets(buf, sizeof(buf), trans_file) != NULL) { - char *save = NULL; - char *tok; - char *tmp_host; - char *tmp_realm; - - tok = strtok_r(buf, " \t\r\n", &save); - if(tok == NULL) - continue; - tmp_host = tok; - tok = strtok_r(NULL, " \t\r\n", &save); - if(tok == NULL) - continue; - tmp_realm = tok; - if (strcasecmp(tmp_host, phost) == 0) { - /* exact match of hostname, so return the realm */ - strlcpy(ret_realm, tmp_realm, ret_realm_sz); - ret = 0; - break; - } - if ((tmp_host[0] == '.') && domain) { - const char *cp = domain; - do { - if(strcasecmp(tmp_host, cp) == 0){ - /* domain match, save for later */ - strlcpy(ret_realm, tmp_realm, ret_realm_sz); - ret = 0; - break; - } - cp = strchr(cp + 1, '.'); - } while(MATCH_SUBDOMAINS && cp); - } - if (ret == 0) - break; - } - fclose(trans_file); - return ret; -} - -char * -krb_realmofhost(const char *host) -{ - static char ret_realm[REALM_SZ]; - char *domain; - char phost[MaxHostNameLen]; - - krb_name_to_name(host, phost, sizeof(phost)); - - domain = strchr(phost, '.'); - - if(file_find_realm(phost, domain, ret_realm, sizeof ret_realm) == 0) - return ret_realm; - - if(dns_find_realm(phost, ret_realm) >= 0) - return ret_realm; - - if (domain) { - char *cp; - - strlcpy(ret_realm, &domain[1], REALM_SZ); - /* Upper-case realm */ - for (cp = ret_realm; *cp; cp++) - *cp = toupper(*cp); - } else { - strncpy(ret_realm, krb_get_default_realm(), REALM_SZ); /* Wild guess */ - } - return ret_realm; -} |