1 files changed, 98 insertions, 0 deletions
diff --git a/src/slave/kprop_util.c b/src/slave/kprop_util.c
new file mode 100644
index 000000000000..f182554e6171
--- /dev/null
+++ b/src/slave/kprop_util.c
@@ -0,0 +1,98 @@
+/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
+/* slave/kprop_util.c */
+/*
+ * Copyright (C) 2010 by the Massachusetts Institute of Technology.
+ * All rights reserved.
+ *
+ * Export of this software from the United States of America may
+ *   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.  Furthermore if you modify this software you must label
+ * your software as modified software and not distribute it in such a
+ * fashion that it might be confused with the original M.I.T. software.
+ * 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.
+ */
+
+/* sockaddr2krbaddr() utility function used by kprop and kpropd */
+
+#include "k5-int.h"
+#include "kprop.h"
+
+#include <sys/types.h>
+#include <sys/socket.h>
+
+/*
+ * Convert an IPv4 or IPv6 socket address to a newly allocated krb5_address.
+ * There is similar code elsewhere in the tree, so this should possibly become
+ * a libkrb5 API in the future.
+ */
+krb5_error_code
+sockaddr2krbaddr(krb5_context context, int family, struct sockaddr *sa,
+                 krb5_address **dest)
+{
+    krb5_address addr;
+
+    addr.magic = KV5M_ADDRESS;
+    if (family == AF_INET) {
+        struct sockaddr_in *sa4 = (struct sockaddr_in *) sa;
+        addr.addrtype = ADDRTYPE_INET;
+        addr.length = sizeof(sa4->sin_addr);
+        addr.contents = (krb5_octet *) &sa4->sin_addr;
+    } else if (family == AF_INET6) {
+        struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) sa;
+        if (IN6_IS_ADDR_V4MAPPED(&sa6->sin6_addr)) {
+            addr.addrtype = ADDRTYPE_INET;
+            addr.contents = (krb5_octet *) &sa6->sin6_addr + 12;
+            addr.length = 4;
+        } else {
+            addr.addrtype = ADDRTYPE_INET6;
+            addr.length = sizeof(sa6->sin6_addr);
+            addr.contents = (krb5_octet *) &sa6->sin6_addr;
+        }
+    } else
+        return KRB5_PROG_ATYPE_NOSUPP;
+
+    return krb5_copy_addr(context, &addr, dest);
+}
+
+/* Construct a host-based principal, similar to krb5_sname_to_principal() but
+ * with a specified realm. */
+krb5_error_code
+sn2princ_realm(krb5_context context, const char *hostname, const char *sname,
+               const char *realm, krb5_principal *princ_out)
+{
+    krb5_error_code ret;
+    char *canonhost, localname[MAXHOSTNAMELEN];
+
+    *princ_out = NULL;
+    assert(sname != NULL && realm != NULL);
+
+    /* If hostname is NULL, use the local hostname. */
+    if (hostname == NULL) {
+        if (gethostname(localname, MAXHOSTNAMELEN) != 0)
+            return SOCKET_ERRNO;
+        hostname = localname;
+    }
+
+    ret = krb5_expand_hostname(context, hostname, &canonhost);
+    if (ret)
+        return ret;
+
+    ret = krb5_build_principal(context, princ_out, strlen(realm), realm, sname,
+                               canonhost, (char *)NULL);
+    krb5_free_string(context, canonhost);
+    if (!ret)
+        (*princ_out)->type = KRB5_NT_SRV_HST;
+    return ret;
+}