diff --git a/.gitignore b/.gitignore
index edf6645..a32de82 100644
--- a/.gitignore
+++ b/.gitignore
@@ -27,3 +27,4 @@
 *.i*86
 *.x86_64
 *.hex
+/build
diff --git a/src/hmac/hmac.h b/src/hmac/hmac.h
index 29da7d2..b325bf3 100644
--- a/src/hmac/hmac.h
+++ b/src/hmac/hmac.h
@@ -16,17 +16,4 @@ void hmac_sha1(const uint8_t *k,   /* secret key */
         uint8_t *out, /* output buffer, at least "t" bytes */
         size_t *t);
 
-
-enum hmac_hash {
-    HMAC_HASH_SHA1
-};
-
-struct hmac;
-
-int hmac_create(struct hmac **hmacp, enum hmac_hash hash,
-        const uint8_t *key, size_t key_len);
-
-int hmac_digest(struct hmac *hmac, uint8_t *md, size_t md_len,
-        const uint8_t *data, size_t data_len);
-
 #endif // HMAC_H_