diff --git a/.gitignore b/.gitignore
index 80aca69..74fc985 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 /target
 Cargo.lock
 *~
+node_modules/
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..def8f87
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,7 @@
+
+
+khash:
+	cargo build --release
+
+install:
+	cp ./target/release/libkana_hash.so /usr/lib/libkana_hash.so
diff --git a/node/index.js b/node/index.js
new file mode 100644
index 0000000..efb9708
--- /dev/null
+++ b/node/index.js
@@ -0,0 +1,22 @@
+const ffi = require('ffi');
+const struct = require('ref-struct');
+const ref = require('ref');
+
+
+const libhkana = ffi.Library('libkana_hash', {
+    '_kana_new_salt': ['int', ['pointer', 'long', 'pointer']],
+    '_kana_free_salt': ['int', ['pointer']],
+    '_kana_do': ['int', ['pointer', 'long', 'pointer', 'pointer', 'long']],
+    '_kana_length': ['int', ['pointer', 'long', 'pointer', 'pointer']],
+});
+
+const Kana = require('./kana');
+
+let buffer= ref.alloc('long');
+let sz = ref.alloc('long');
+console.log(libhkana._kana_length(buffer, 2, null, sz));
+console.log(sz.deref());
+
+let output = new Buffer(sz);
+console.log(libhkana._kana_do(buffer, 2, null, output, sz));
+console.log(ref.readCString(output, 0));
diff --git a/node/kana.js b/node/kana.js
new file mode 100644
index 0000000..c4bd002
--- /dev/null
+++ b/node/kana.js
@@ -0,0 +1,10 @@
+const ffi = require('ffi');
+const struct = require('ref-struct');
+const ref = require('ref');
+
+const Salt = module.exports.Salt = struct({
+    'size': 'pointer',
+    'body': 'pointer',
+});
+const PSalt = module.exports.PSalt = ref.refType(Salt);
+
diff --git a/node/package-lock.json b/node/package-lock.json
new file mode 100644
index 0000000..f46d1a0
--- /dev/null
+++ b/node/package-lock.json
@@ -0,0 +1,77 @@
+{
+  "name": "kana-hash",
+  "version": "1.0.0",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
+    "bindings": {
+      "version": "1.5.0",
+      "resolved": "https://registry.npmjs.org/bindings/-/bindings-1.5.0.tgz",
+      "integrity": "sha512-p2q/t/mhvuOj/UeLlV6566GD/guowlr0hHxClI0W9m7MWYkL1F0hLo+0Aexs9HSPCtR1SXQ0TD3MMKrXZajbiQ==",
+      "requires": {
+        "file-uri-to-path": "1.0.0"
+      }
+    },
+    "debug": {
+      "version": "2.6.9",
+      "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.9.tgz",
+      "integrity": "sha512-bC7ElrdJaJnPbAP+1EotYvqZsb3ecl5wi6Bfi6BJTUcNowp6cvspg0jXznRTKDjm/E7AdgFBVeAPVMNcKGsHMA==",
+      "requires": {
+        "ms": "2.0.0"
+      }
+    },
+    "ffi": {
+      "version": "2.3.0",
+      "resolved": "https://registry.npmjs.org/ffi/-/ffi-2.3.0.tgz",
+      "integrity": "sha512-vkPA9Hf9CVuQ5HeMZykYvrZF2QNJ/iKGLkyDkisBnoOOFeFXZQhUPxBARPBIZMJVulvBI2R+jgofW03gyPpJcQ==",
+      "requires": {
+        "bindings": "~1.2.0",
+        "debug": "2",
+        "nan": "2",
+        "ref": "1",
+        "ref-struct": "1"
+      },
+      "dependencies": {
+        "bindings": {
+          "version": "1.2.1",
+          "resolved": "https://registry.npmjs.org/bindings/-/bindings-1.2.1.tgz",
+          "integrity": "sha1-FK1hE4EtLTfXLme0ystLtyZQXxE="
+        }
+      }
+    },
+    "file-uri-to-path": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/file-uri-to-path/-/file-uri-to-path-1.0.0.tgz",
+      "integrity": "sha512-0Zt+s3L7Vf1biwWZ29aARiVYLx7iMGnEUl9x33fbB/j3jR81u/O2LbqK+Bm1CDSNDKVtJ/YjwY7TUd5SkeLQLw=="
+    },
+    "ms": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/ms/-/ms-2.0.0.tgz",
+      "integrity": "sha1-VgiurfwAvmwpAd9fmGF4jeDVl8g="
+    },
+    "nan": {
+      "version": "2.14.1",
+      "resolved": "https://registry.npmjs.org/nan/-/nan-2.14.1.tgz",
+      "integrity": "sha512-isWHgVjnFjh2x2yuJ/tj3JbwoHu3UC2dX5G/88Cm24yB6YopVgxvBObDY7n5xW6ExmFhJpSEQqFPvq9zaXc8Jw=="
+    },
+    "ref": {
+      "version": "1.3.5",
+      "resolved": "https://registry.npmjs.org/ref/-/ref-1.3.5.tgz",
+      "integrity": "sha512-2cBCniTtxcGUjDpvFfVpw323a83/0RLSGJJY5l5lcomZWhYpU2cuLdsvYqMixvsdLJ9+sTdzEkju8J8ZHDM2nA==",
+      "requires": {
+        "bindings": "1",
+        "debug": "2",
+        "nan": "2"
+      }
+    },
+    "ref-struct": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/ref-struct/-/ref-struct-1.1.0.tgz",
+      "integrity": "sha1-XV7mWtQc78Olxf60BYcmHkee3BM=",
+      "requires": {
+        "debug": "2",
+        "ref": "1"
+      }
+    }
+  }
+}
diff --git a/node/package.json b/node/package.json
new file mode 100644
index 0000000..d575694
--- /dev/null
+++ b/node/package.json
@@ -0,0 +1,15 @@
+{
+  "name": "kana-hash",
+  "version": "1.0.0",
+  "description": "Kana hashes",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "ffi": "^2.3.0",
+    "ref-struct": "^1.1.0"
+  }
+}
diff --git a/src/lib.rs b/src/lib.rs
index ca1b642..fc47e94 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -73,7 +73,6 @@ fn compute<T: Read, Digest: provider::ByteProvider>(mut from: T, salt: salt::Sal
 {
     let (read, hash) = provider::compute::<_, Digest>(&mut from, salt)?;
 
-    println!("hash ({}): {}", read, hash);
     let mut output = String::with_capacity(128);
     for element in hash.bytes().iter()
 	.into_16()