1 files changed, 76 insertions, 0 deletions
diff --git a/src/lib/crypto/krb/make_random_key.c b/src/lib/crypto/krb/make_random_key.c
new file mode 100644
index 000000000000..f5af18780eb7
--- /dev/null
+++ b/src/lib/crypto/krb/make_random_key.c
@@ -0,0 +1,76 @@
+/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
+/*
+ * Copyright (C) 1998 by the FundsXpress, INC.
+ *
+ * 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 FundsXpress. not be used in advertising or publicity pertaining
+ * to distribution of the software without specific, written prior
+ * permission.  FundsXpress makes no representations about the suitability of
+ * this software for any purpose.  It is provided "as is" without express
+ * or implied warranty.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+#include "crypto_int.h"
+
+krb5_error_code KRB5_CALLCONV
+krb5_c_make_random_key(krb5_context context, krb5_enctype enctype,
+                       krb5_keyblock *random_key)
+{
+    krb5_error_code ret;
+    const struct krb5_keytypes *ktp;
+    const struct krb5_enc_provider *enc;
+    size_t keybytes, keylength;
+    krb5_data random_data;
+    unsigned char *bytes = NULL;
+
+    ktp = find_enctype(enctype);
+    if (ktp == NULL)
+        return KRB5_BAD_ENCTYPE;
+    enc = ktp->enc;
+
+    keybytes = enc->keybytes;
+    keylength = enc->keylength;
+
+    bytes = k5alloc(keybytes, &ret);
+    if (ret)
+        return ret;
+    random_key->contents = k5alloc(keylength, &ret);
+    if (ret)
+        goto cleanup;
+
+    random_data.data = (char *) bytes;
+    random_data.length = keybytes;
+
+    ret = krb5_c_random_make_octets(context, &random_data);
+    if (ret)
+        goto cleanup;
+
+    random_key->magic = KV5M_KEYBLOCK;
+    random_key->enctype = enctype;
+    random_key->length = keylength;
+
+    ret = (*ktp->rand2key)(&random_data, random_key);
+
+cleanup:
+    if (ret) {
+        zapfree(random_key->contents, keylength);
+        random_key->contents = NULL;
+    }
+    zapfree(bytes, keybytes);
+    return ret;
+}