BSD 4_3_Net_2 development

Work on file usr/src/kerberosIV/krb/getrealm.c

Synthesized-from: CSRG/cd2/net.2

diff --git a/usr/src/kerberosIV/krb/getrealm.c b/usr/src/kerberosIV/krb/getrealm.c
new file mode 100644 (file)
index 0000000..5506b12
--- /dev/null
+++ b/usr/src/kerberosIV/krb/getrealm.c
@@ -0,0 +1,107 @@
+/*
+ * $Source: /usr/src/kerberosIV/krb/RCS/getrealm.c,v $
+ * $Author: kfall $
+ *
+ * Copyright 1988 by the Massachusetts Institute of Technology.
+ *
+ * For copying and distribution information, please see the file
+ * <mit-copyright.h>.
+ *
+ * routine to convert hostname into realm name.
+ */
+
+#ifndef        lint
+static char rcsid_getrealm_c[] =
+"$Id: getrealm.c,v 4.7 90/06/25 20:56:21 kfall Exp Locker: kfall $";
+#endif lint
+
+#include <mit-copyright.h>
+#include <strings.h>
+#include <stdio.h>
+#include <ctype.h>
+#include <des.h>
+#include <krb.h>
+#include <sys/param.h>
+
+/* for Ultrix and friends ... */
+#ifndef MAXHOSTNAMELEN
+#define MAXHOSTNAMELEN 64
+#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)
+ */
+
+static char ret_realm[REALM_SZ+1];
+
+char *
+krb_realmofhost(host)
+char *host;
+{
+       char *domain;
+       FILE *trans_file;
+       char trans_host[MAXHOSTNAMELEN+1];
+       char trans_realm[REALM_SZ+1];
+       int retval;
+
+       domain = index(host, '.');
+
+       /* prepare default */
+       if (domain) {
+               char *cp;
+
+               strncpy(ret_realm, &domain[1], REALM_SZ);
+               ret_realm[REALM_SZ] = '\0';
+               /* Upper-case realm */
+               for (cp = ret_realm; *cp; cp++)
+                       if (islower(*cp))
+                               *cp = toupper(*cp);
+       } else {
+               krb_get_lrealm(ret_realm, 0);
+       }
+
+       if ((trans_file = fopen(KRB_RLM_TRANS, "r")) == (FILE *) 0) {
+               /* krb_errno = KRB_NO_TRANS */
+               return(ret_realm);
+       }
+       while (1) {
+               if ((retval = fscanf(trans_file, "%s %s",
+                                    trans_host, trans_realm)) != 2) {
+                       if (retval == EOF) {
+                               fclose(trans_file);
+                               return(ret_realm);
+                       }
+                       continue;       /* ignore broken lines */
+               }
+               trans_host[MAXHOSTNAMELEN] = '\0';
+               trans_realm[REALM_SZ] = '\0';
+               if (!strcasecmp(trans_host, host)) {
+                       /* exact match of hostname, so return the realm */
+                       (void) strcpy(ret_realm, trans_realm);
+                       fclose(trans_file);
+                       return(ret_realm);
+               }
+               if ((trans_host[0] == '.') && domain) { 
+                       /* this is a domain match */
+                       if (!strcasecmp(trans_host, domain)) {
+                               /* domain match, save for later */
+                               (void) strcpy(ret_realm, trans_realm);
+                               continue;
+                       }
+               }
+       }
+}