1 files changed, 95 insertions, 0 deletions
diff --git a/third_party/heimdal/lib/krb5/get_default_principal.c b/third_party/heimdal/lib/krb5/get_default_principal.c
new file mode 100644
index 0000000..3548074
--- /dev/null
+++ b/third_party/heimdal/lib/krb5/get_default_principal.c
@@ -0,0 +1,95 @@
+/*
+ * Copyright (c) 1997 - 2001 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"
+
+/*
+ * Try to find out what's a reasonable default principal.
+ */
+
+KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
+_krb5_get_default_principal_local (krb5_context context,
+				   krb5_principal *princ)
+{
+    const char *user = NULL;
+    const char *second_component = NULL;
+    char userbuf[128];
+
+    *princ = NULL;
+
+    /*
+     * NOTE: We prefer getlogin_r() (via roken_get_loginname()) to using $USER,
+     *       $LOGNAME, or getpwuid_r() (via roken_get_username()), in that
+     *       order, otherwise we won't figure out to output
+     *       <username>/root@DEFAULT_REALM.
+     */
+#ifndef WIN32
+    if (geteuid() == 0)
+        user = roken_get_loginname(userbuf, sizeof(userbuf));
+#endif
+    if (user == NULL)
+        user = roken_get_username(userbuf, sizeof(userbuf));
+    if (user == NULL) {
+        krb5_set_error_message(context, ENOTTY,
+                               N_("unable to figure out current principal",
+                                  ""));
+        return ENOTTY; /* XXX */
+    }
+
+#ifndef WIN32
+    if (!issuid() && getuid() == 0 && strcmp(user, "root") != 0)
+        second_component = "root"; /* We'll use <user>/root */
+#endif
+    return krb5_make_principal(context, princ, NULL, user,
+                               second_component, NULL);
+}
+
+KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
+krb5_get_default_principal (krb5_context context,
+			    krb5_principal *princ)
+{
+    krb5_error_code ret;
+    krb5_ccache id;
+
+    *princ = NULL;
+
+    ret = krb5_cc_default (context, &id);
+    if (ret == 0) {
+	ret = krb5_cc_get_principal (context, id, princ);
+	krb5_cc_close (context, id);
+	if (ret == 0)
+	    return 0;
+    }
+
+    return _krb5_get_default_principal_local(context, princ);
+}