Add libsodium to build

src/3rdparty/sodium/randombytes.h

@@ -0,0 +1,68 @@
+
+#ifndef randombytes_H
+#define randombytes_H
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include <sys/types.h>
+
+#include "export.h"
+
+#ifdef __cplusplus
+# ifdef __GNUC__
+#  pragma GCC diagnostic ignored "-Wlong-long"
+# endif
+extern "C" {
+#endif
+
+typedef struct randombytes_implementation {
+    const char *(*implementation_name)(void); /* required */
+    uint32_t    (*random)(void);              /* required */
+    void        (*stir)(void);                /* optional */
+    uint32_t    (*uniform)(const uint32_t upper_bound); /* optional, a default implementation will be used if NULL */
+    void        (*buf)(void * const buf, const size_t size); /* required */
+    int         (*close)(void);               /* optional */
+} randombytes_implementation;
+
+#define randombytes_BYTES_MAX SODIUM_MIN(SODIUM_SIZE_MAX, 0xffffffffUL)
+
+#define randombytes_SEEDBYTES 32U
+SODIUM_EXPORT
+size_t randombytes_seedbytes(void);
+
+SODIUM_EXPORT
+void randombytes_buf(void * const buf, const size_t size);
+
+SODIUM_EXPORT
+void randombytes_buf_deterministic(void * const buf, const size_t size,
+                                   const unsigned char seed[randombytes_SEEDBYTES]);
+
+SODIUM_EXPORT
+uint32_t randombytes_random(void);
+
+SODIUM_EXPORT
+uint32_t randombytes_uniform(const uint32_t upper_bound);
+
+SODIUM_EXPORT
+void randombytes_stir(void);
+
+SODIUM_EXPORT
+int randombytes_close(void);
+
+SODIUM_EXPORT
+int randombytes_set_implementation(randombytes_implementation *impl);
+
+SODIUM_EXPORT
+const char *randombytes_implementation_name(void);
+
+/* -- NaCl compatibility interface -- */
+
+SODIUM_EXPORT
+void randombytes(unsigned char * const buf, const unsigned long long buf_len);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif