diff --git a/src/zodium.h b/src/zodium.h
new file mode 100644
index 0000000..5a1bc8d
--- /dev/null
+++ b/src/zodium.h
@@ -0,0 +1,62 @@
+#pragma once
+
+#include <stddef.h>
+
+int sodium_init(void) __attribute__((warn_unused_result));
+;
+
+void sodium_memzero(void* const pnt, const size_t len);
+
+void randombytes_buf(void* const buf, const size_t size) __attribute__((nonnull));
+
+void* sodium_malloc(const size_t size) __attribute__((malloc));
+
+void sodium_free(void* ptr);
+
+#define crypto_pwhash_scryptsalsa208sha256_SALTBYTES          32U
+#define crypto_pwhash_scryptsalsa208sha256_OPSLIMIT_MIN       32768U
+#define crypto_pwhash_scryptsalsa208sha256_MEMLIMIT_MIN       16777216U
+#define crypto_pwhash_scryptsalsa208sha256_OPSLIMIT_SENSITIVE 33554432U
+#define crypto_pwhash_scryptsalsa208sha256_MEMLIMIT_SENSITIVE 1073741824U
+
+int crypto_pwhash_scryptsalsa208sha256(unsigned char* const       out,
+                                       unsigned long long         outlen,
+                                       const char* const          passwd,
+                                       unsigned long long         passwdlen,
+                                       const unsigned char* const salt,
+                                       unsigned long long         opslimit,
+                                       size_t memlimit) __attribute__((warn_unused_result))
+__attribute__((nonnull));
+
+typedef struct crypto_generichash_state {
+    unsigned char opaque[512];
+} crypto_generichash_state;
+
+#define crypto_generichash_BYTES_MAX 64U
+#define crypto_generichash_BYTES     32U
+
+int crypto_generichash_init(crypto_generichash_state* state, const unsigned char* key,
+                            const size_t keylen, const size_t outlen) __attribute__((nonnull(1)));
+
+int crypto_generichash_update(crypto_generichash_state* state,
+                              const unsigned char*      in,
+                              unsigned long long        inlen) __attribute__((nonnull(1)));
+
+int crypto_generichash_final(crypto_generichash_state* state, unsigned char* out,
+                             const size_t outlen) __attribute__((nonnull));
+
+#define crypto_sign_SECRETKEYBYTES 64
+#define crypto_sign_PUBLICKEYBYTES 32
+#define crypto_sign_BYTES          64
+
+int crypto_sign_keypair(unsigned char* pk, unsigned char* sk) __attribute__((nonnull));
+
+int crypto_sign_detached(unsigned char* sig, unsigned long long* siglen_p, const unsigned char* m,
+                         unsigned long long mlen, const unsigned char* sk)
+    __attribute__((nonnull(1, 5)));
+
+int crypto_sign_verify_detached(const unsigned char* sig,
+                                const unsigned char* m,
+                                unsigned long long   mlen,
+                                const unsigned char* pk) __attribute__((warn_unused_result))
+__attribute__((nonnull(1, 4)));
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