1 files changed, 108 insertions, 0 deletions
diff --git a/src/lib/crypto/krb/keyblocks.c b/src/lib/crypto/krb/keyblocks.c
new file mode 100644
index 000000000000..98696f5086e1
--- /dev/null
+++ b/src/lib/crypto/krb/keyblocks.c
@@ -0,0 +1,108 @@
+/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
+/* lib/crypto/krb/keyblocks.c - Keyblock utility functions */
+/*
+ * Copyright (C) 2002, 2005 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.
+ */
+
+#include "crypto_int.h"
+
+krb5_error_code
+krb5int_c_init_keyblock(krb5_context context, krb5_enctype enctype,
+                        size_t length, krb5_keyblock **out)
+{
+    krb5_keyblock *kb;
+
+    assert(out);
+    *out = NULL;
+
+    kb = malloc(sizeof(krb5_keyblock));
+    if (kb == NULL)
+        return ENOMEM;
+    kb->magic = KV5M_KEYBLOCK;
+    kb->enctype = enctype;
+    kb->length = length;
+    if (length) {
+        kb->contents = malloc(length);
+        if (!kb->contents) {
+            free(kb);
+            return ENOMEM;
+        }
+    } else {
+        kb->contents = NULL;
+    }
+
+    *out = kb;
+    return 0;
+}
+
+void
+krb5int_c_free_keyblock(krb5_context context, register krb5_keyblock *val)
+{
+    krb5int_c_free_keyblock_contents(context, val);
+    free(val);
+}
+
+void
+krb5int_c_free_keyblock_contents(krb5_context context, krb5_keyblock *key)
+{
+    if (key && key->contents) {
+        zapfree(key->contents, key->length);
+        key->contents = NULL;
+        key->length = 0;
+    }
+}
+
+krb5_error_code
+krb5int_c_copy_keyblock(krb5_context context, const krb5_keyblock *from,
+                        krb5_keyblock **to)
+{
+    krb5_keyblock *new_key;
+    krb5_error_code code;
+
+    *to = NULL;
+    new_key = malloc(sizeof(*new_key));
+    if (!new_key)
+        return ENOMEM;
+    code = krb5int_c_copy_keyblock_contents(context, from, new_key);
+    if (code) {
+        free(new_key);
+        return code;
+    }
+    *to = new_key;
+    return 0;
+}
+
+krb5_error_code
+krb5int_c_copy_keyblock_contents(krb5_context context,
+                                 const krb5_keyblock *from, krb5_keyblock *to)
+{
+    *to = *from;
+    if (to->length) {
+        to->contents = malloc(to->length);
+        if (!to->contents)
+            return ENOMEM;
+        memcpy(to->contents, from->contents, to->length);
+    } else
+        to->contents = 0;
+    return 0;
+}