Initial import of NFC GNSS SDK project

2026-09-15 16:10:12 +08:00
commit 2746cc3d4e
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+/**
+ * \file havege.h
+ *
+ * \brief HAVEGE: HArdware Volatile Entropy Gathering and Expansion
+ */
+/*
+ *  Copyright The Mbed TLS Contributors
+ *  SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
+ */
+#ifndef MBEDTLS_HAVEGE_H
+#define MBEDTLS_HAVEGE_H
+
+#if !defined(MBEDTLS_CONFIG_FILE)
+#include "mbedtls/config.h"
+#else
+#include MBEDTLS_CONFIG_FILE
+#endif
+
+#include <stddef.h>
+#include <stdint.h>
+
+#define MBEDTLS_HAVEGE_COLLECT_SIZE 1024
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * \brief          HAVEGE state structure
+ */
+typedef struct mbedtls_havege_state {
+    uint32_t PT1, PT2, offset[2];
+    uint32_t pool[MBEDTLS_HAVEGE_COLLECT_SIZE];
+    uint32_t WALK[8192];
+}
+mbedtls_havege_state;
+
+/**
+ * \brief          HAVEGE initialization
+ *
+ * \param hs       HAVEGE state to be initialized
+ */
+void mbedtls_havege_init(mbedtls_havege_state *hs);
+
+/**
+ * \brief          Clear HAVEGE state
+ *
+ * \param hs       HAVEGE state to be cleared
+ */
+void mbedtls_havege_free(mbedtls_havege_state *hs);
+
+/**
+ * \brief          HAVEGE rand function
+ *
+ * \param p_rng    A HAVEGE state
+ * \param output   Buffer to fill
+ * \param len      Length of buffer
+ *
+ * \return         0
+ */
+int mbedtls_havege_random(void *p_rng, unsigned char *output, size_t len);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* havege.h */