worked sleep.h

doc sleep.3 needs rename

inc/sleep.h

@@ -1,9 +1,6 @@
-// TODO implement SLEEP
 #ifndef SLEEP_H
 #define SLEEP_H
-
-#include "key.h"
-
+// TODO implement SLEEP
 /*metadata.key
 metadata.signatures
 metadata.bitfield
@@ -13,5 +10,39 @@ content.key
 content.signatures
 content.bitfield
 content.tree*/
+#include "key.h"
+#include <stdint.h>
+#include <stddef.h>
+// test
+#include <assert.h>
 
-#endif /* NURSERY_H */
+#define SLEEP_HEADER_SIZE	32u
+
+#define SLEEP_ALGO_BLAKE2B	"BLAKE2b"
+#define SLEEP_ALGO_ED25519	"Ed25519"
+
+typedef struct sleep_header {
+	uint32_t	magic_be;
+	uint8_t	version;
+	uint16_t	entry_size_be;
+	uint8_t	algo_len;
+	char	algo[24];
+} sleep_header_t;
+
+// crypto helpers
+#ifdef SLEEP_SALT
+int sleep_gen_ed25519(uint8_t pubkey[32], uint8_t seckey[64]);
+// sign
+int sleep_sign_ed25519(const uint8_t *msg, size_t msglen,
+		       const uint8_t seckey[64], uint8_t sig_out[64]);
+// verify
+int sleep_verify_ed25519(const uint8_t *msg, size_t msglen,
+			 const uint8_t pubkey[32], const uint8_t sig[64]);
+// discovery
+int sleep_compute_discovery_key(const uint8_t pubkey[32], uint8_t out32[32]);
+#endif /* SLEEP_SALT */
+
+// function decs
+
+
+#endif /* SLEEP_H */