macaroons: use fast scrypt options in itest and unit tests

macaroons/security.go

@@ -0,0 +1,13 @@
+// +build !rpctest
+
+package macaroons
+
+import "github.com/btcsuite/btcwallet/snacl"
+
+var (
+	// Below are the default scrypt parameters that are used when creating
+	// the encryption key for the macaroon database with snacl.NewSecretKey.
+	scryptN = snacl.DefaultN
+	scryptR = snacl.DefaultR
+	scryptP = snacl.DefaultP
+)

macaroons/security_rpctest.go

@@ -0,0 +1,14 @@
+// +build rpctest
+
+package macaroons
+
+import "github.com/btcsuite/btcwallet/waddrmgr"
+
+var (
+	// Below are the reduced scrypt parameters that are used when creating
+	// the encryption key for the macaroon database with snacl.NewSecretKey.
+	// We use very low values for our itest/rpctest to speed things up.
+	scryptN = waddrmgr.FastScryptOptions.N
+	scryptR = waddrmgr.FastScryptOptions.R
+	scryptP = waddrmgr.FastScryptOptions.P
+)

macaroons/security_test.go

@@ -0,0 +1,12 @@
+package macaroons
+
+import "github.com/btcsuite/btcwallet/waddrmgr"
+
+func init() {
+	// Below are the reduced scrypt parameters that are used when creating
+	// the encryption key for the macaroon database with snacl.NewSecretKey.
+	// We use very low values for our itest/rpctest to speed things up.
+	scryptN = waddrmgr.FastScryptOptions.N
+	scryptR = waddrmgr.FastScryptOptions.R
+	scryptP = waddrmgr.FastScryptOptions.P
+}

macaroons/store.go

@@ -106,8 +106,9 @@ func (r *RootKeyStorage) CreateUnlock(password *[]byte) error {
 		}
 
 		// We haven't yet stored a key, so create a new one.
-		encKey, err := snacl.NewSecretKey(password, snacl.DefaultN,
-			snacl.DefaultR, snacl.DefaultP)
+		encKey, err := snacl.NewSecretKey(
+			password, scryptN, scryptR, scryptP,
+		)
 		if err != nil {
 			return err
 		}