1 files changed, 72 insertions, 0 deletions
diff --git a/source4/heimdal/lib/krb5/generate_subkey.c b/source4/heimdal/lib/krb5/generate_subkey.c
new file mode 100644
index 0000000000..aa68d14df6
--- /dev/null
+++ b/source4/heimdal/lib/krb5/generate_subkey.c
@@ -0,0 +1,72 @@
+/*
+ * 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>
+
+RCSID("$Id$");
+
+krb5_error_code KRB5_LIB_FUNCTION
+krb5_generate_subkey(krb5_context context,
+		     const krb5_keyblock *key,
+		     krb5_keyblock **subkey)
+{
+    return krb5_generate_subkey_extended(context, key, key->keytype, subkey);
+}
+
+krb5_error_code KRB5_LIB_FUNCTION
+krb5_generate_subkey_extended(krb5_context context,
+			      const krb5_keyblock *key,
+			      krb5_enctype etype,
+			      krb5_keyblock **subkey)
+{
+    krb5_error_code ret;
+
+    ALLOC(*subkey, 1);
+    if (*subkey == NULL) {
+	krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
+	return ENOMEM;
+    }
+
+    if (etype == ETYPE_NULL)
+	etype = key->keytype; /* use session key etype */
+
+    /* XXX should we use the session key as input to the RF? */
+    ret = krb5_generate_random_keyblock(context, etype, *subkey);
+    if (ret != 0) {
+	free(*subkey);
+	*subkey = NULL;
+    }
+
+    return ret;
+}
+