From a0383401b14a6c8c71a4e48d431bcfca5b8fbfde Mon Sep 17 00:00:00 2001
From: insanity <insanity@loafle.com>
Date: Wed, 29 Mar 2017 12:29:06 +0900
Subject: [PATCH] encryption

---
 .../overflow/encryption/encryption.go         | 28 +++++++++++++++++++
 .../overflow/encryption/encryption_test.go    | 15 ++++++++++
 2 files changed, 43 insertions(+)
 create mode 100644 src/loafle.com/overflow/encryption/encryption.go
 create mode 100644 src/loafle.com/overflow/encryption/encryption_test.go

diff --git a/src/loafle.com/overflow/encryption/encryption.go b/src/loafle.com/overflow/encryption/encryption.go
new file mode 100644
index 0000000..be7e1cf
--- /dev/null
+++ b/src/loafle.com/overflow/encryption/encryption.go
@@ -0,0 +1,28 @@
+package encryption
+
+import (
+	"crypto/rand"
+	"golang.org/x/crypto/scrypt"
+	"io"
+)
+
+const (
+	PW_SALT_BYTES = 32
+	PW_HASH_BYTES = 64
+)
+
+func Encrypt(pw string) ([]byte, []byte, error) {
+
+	salt := make([]byte, PW_SALT_BYTES)
+	_, err := io.ReadFull(rand.Reader, salt)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	hash, err := scrypt.Key([]byte(pw), salt, 16384, 8, 1, PW_HASH_BYTES)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	return salt, hash, nil
+}
diff --git a/src/loafle.com/overflow/encryption/encryption_test.go b/src/loafle.com/overflow/encryption/encryption_test.go
new file mode 100644
index 0000000..c664ac7
--- /dev/null
+++ b/src/loafle.com/overflow/encryption/encryption_test.go
@@ -0,0 +1,15 @@
+package encryption
+
+import (
+	"testing"
+)
+
+func TestEncrypt(t *testing.T) {
+	salt, hash, err := Encrypt("MyPassword")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	t.Logf("salt : %x\n", salt)
+	t.Logf("hash : %x\n", hash)
+}