Kerberos IV code, based on a merge of fixed code from KTH and original

4.4BSD Lite code (international edition).  Provides all functionality
from the original 4.4BSD code plus standard Kerberos elements that were
omitted in the 4.4BSD code.

1 files changed, 133 insertions, 0 deletions

diff --git a/kerberosIV/krb/read_service_key.c b/kerberosIV/krb/read_service_key.c
new file mode 100644
index 00000000000..31ba2e84ee0
--- /dev/null
+++ b/kerberosIV/krb/read_service_key.c
@@ -0,0 +1,133 @@
+/*
+ * This software may now be redistributed outside the US.
+ *
+ * $Source: /cvs/OpenBSD/src/kerberosIV/krb/Attic/read_service_key.c,v $
+ *
+ * $Locker:  $
+ */
+
+/* 
+  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"
+
+/*
+ * The private keys for servers on a given host are stored in a
+ * "srvtab" file (typically "/etc/srvtab").  This routine extracts
+ * a given server's key from the file.
+ *
+ * read_service_key() takes the server's name ("service"), "instance",
+ * and "realm" and a key version number "kvno", and looks in the given
+ * "file" for the corresponding entry, and if found, returns the entry's
+ * key field in "key".
+ * 
+ * If "instance" contains the string "*", then it will match
+ * any instance, and the chosen instance will be copied to that
+ * string.  For this reason it is important that the there is enough
+ * space beyond the "*" to receive the entry.
+ *
+ * If "kvno" is 0, it is treated as a wild card and the first
+ * matching entry regardless of the "vno" field is returned.
+ *
+ * This routine returns KSUCCESS on success, otherwise KFAILURE.
+ *
+ * The format of each "srvtab" entry is as follows:
+ *
+ * Size			Variable		Field in file
+ * ----			--------		-------------
+ * string		serv			server name
+ * string		inst			server instance
+ * string		realm			server realm
+ * 1 byte		vno			server key version #
+ * 8 bytes		key			server's key
+ * ...			...			...
+ */
+
+
+/*ARGSUSED */
+int
+read_service_key(service, instance, realm, kvno, file, key)
+	char *service;		/* Service Name */
+	char *instance;		/* Instance name or "*" */
+	char *realm;		/* Realm */
+	int kvno;		/* Key version number */
+	char *file;		/* Filename */
+	char *key;		/* Pointer to key to be filled in */
+{
+    char serv[SNAME_SZ];
+    char inst[INST_SZ];
+    char rlm[REALM_SZ];
+    unsigned char vno;          /* Key version number */
+    int wcard;
+
+    int stab, open(const char *, int, ...);
+
+    if ((stab = open(file, 0, 0)) < 0)
+        return(KFAILURE);
+
+    wcard = (instance[0] == '*') && (instance[1] == '\0');
+
+    while (getst(stab,serv,SNAME_SZ) > 0) { /* Read sname */
+        (void) getst(stab,inst,INST_SZ); /* Instance */
+        (void) getst(stab,rlm,REALM_SZ); /* Realm */
+        /* Vers number */
+        if (read(stab,(char *)&vno,1) != 1) {
+	    close(stab);
+            return(KFAILURE);
+	}
+        /* Key */
+        if (read(stab,key,8) != 8) {
+	    close(stab);
+            return(KFAILURE);
+	}
+        /* Is this the right service */
+        if (strcmp(serv,service))
+            continue;
+        /* How about instance */
+        if (!wcard && strcmp(inst,instance))
+            continue;
+        if (wcard)
+            (void) strncpy(instance,inst,INST_SZ);
+        /* Is this the right realm */
+#ifdef ATHENA_COMPAT
+	/* XXX For backward compatibility:  if keyfile says "Athena"
+	   and caller wants "ATHENA.MIT.EDU", call it a match */
+        if (strcmp(rlm,realm) &&
+	    (strcmp(rlm,"Athena") ||
+	     strcmp(realm,"ATHENA.MIT.EDU")))
+	    continue;
+#else /* ! ATHENA_COMPAT */
+        if (strcmp(rlm,realm)) 
+	    continue;
+#endif /* ATHENA_COMPAT */
+
+        /* How about the key version number */
+        if (kvno && kvno != (int) vno)
+            continue;
+
+        (void) close(stab);
+        return(KSUCCESS);
+    }
+
+    /* Can't find the requested service */
+    (void) close(stab);
+    return(KFAILURE);
+}