1 files changed, 90 insertions, 0 deletions
diff --git a/source4/heimdal/lib/krb5/aname_to_localname.c b/source4/heimdal/lib/krb5/aname_to_localname.c
new file mode 100644
index 0000000000..7bfd861da9
--- /dev/null
+++ b/source4/heimdal/lib/krb5/aname_to_localname.c
@@ -0,0 +1,90 @@
+/*
+ * Copyright (c) 1997 - 1999, 2002 - 2003 Kungliga Tekniska Högskolan
+ * (Royal Institute of Technology, Stockholm, Sweden).
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of the Institute nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include "krb5_locl.h"
+
+KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
+krb5_aname_to_localname (krb5_context context,
+			 krb5_const_principal aname,
+			 size_t lnsize,
+			 char *lname)
+{
+    krb5_error_code ret;
+    krb5_realm *lrealms, *r;
+    int valid;
+    size_t len;
+    const char *res;
+
+    ret = krb5_get_default_realms (context, &lrealms);
+    if (ret)
+	return ret;
+
+    valid = 0;
+    for (r = lrealms; *r != NULL; ++r) {
+	if (strcmp (*r, aname->realm) == 0) {
+	    valid = 1;
+	    break;
+	}
+    }
+    krb5_free_host_realm (context, lrealms);
+    if (valid == 0)
+	return KRB5_NO_LOCALNAME;
+
+    if (aname->name.name_string.len == 1)
+	res = aname->name.name_string.val[0];
+    else if (aname->name.name_string.len == 2
+	     && strcmp (aname->name.name_string.val[1], "root") == 0) {
+	krb5_principal rootprinc;
+	krb5_boolean userok;
+
+	res = "root";
+
+	ret = krb5_copy_principal(context, aname, &rootprinc);
+	if (ret)
+	    return ret;
+
+	userok = krb5_kuserok(context, rootprinc, res);
+	krb5_free_principal(context, rootprinc);
+	if (!userok)
+	    return KRB5_NO_LOCALNAME;
+
+    } else
+	return KRB5_NO_LOCALNAME;
+
+    len = strlen (res);
+    if (len >= lnsize)
+	return ERANGE;
+    strlcpy (lname, res, lnsize);
+
+    return 0;
+}