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+/*
+ * masterkey.h
+ * -----------
+ * Code to handle the Master Key that wraps all the keys in the keystore.
+ *
+ * Copyright (c) 2016, NORDUnet A/S All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ * - Redistributions of source code must retain the above copyright notice,
+ *   this list of conditions and the following disclaimer.
+ *
+ * - 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.
+ *
+ * - Neither the name of the NORDUnet 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 COPYRIGHT HOLDERS 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 COPYRIGHT
+ * HOLDER 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.
+ */
+
+#ifndef __STM32_HSM_MASTERKEY_H
+#define __STM32_HSM_MASTERKEY_H
+
+typedef enum {
+    HSM_MASTERKEY_FAIL,
+    HSM_MASTERKEY_OK,
+    HSM_MASTERKEY_SET,
+    HSM_MASTERKEY_NOT_SET,
+} masterkey_status_t;
+
+extern masterkey_status_t masterkey_volatile_read(uint8_t *buf, size_t len);
+extern masterkey_status_t masterkey_volatile_write(uint8_t *buf, size_t len);
+extern masterkey_status_t masterkey_volatile_erase(size_t len);
+
+extern masterkey_status_t masterkey_flash_read(uint8_t *buf, size_t len);
+extern masterkey_status_t masterkey_flash_write(uint8_t *buf, size_t len);
+extern masterkey_status_t masterkey_flash_erase(size_t len);
+
+#endif /* __STM32_HSM_MASTERKEY_H */