Refactor internal packages

internal/httpauth/client.go

@@ -23,6 +23,11 @@ const (
 	invalidNonceErrorMessage = "SW-Nonce does not match"
 )
 
+// Error is the object returned to the client when there's an error.
+type Error struct {
+	Error string `json:"error"`
+}
+
 // NextNonceResponse represents a ServeHTTP response for json encoding
 type NextNonceResponse struct {
 	Edge      cipher.PubKey `json:"edge"`
@@ -42,14 +47,12 @@ type HTTPError struct {
 }
 
 // Client implements Client for auth services.
-// As Client needs to dial both with reusing address and without it, it uses two http clients: reuseClient and client.
 type Client struct {
 	// atomic requires 64-bit alignment for struct field access
 	nonce          uint64
 	mu             sync.Mutex
 	reqMu          sync.Mutex
 	client         *http.Client
-	reuseClient    *http.Client
 	key            cipher.PubKey
 	sec            cipher.SecKey
 	addr           string // sanitized address of the client, which may differ from addr used in NewClient
@@ -67,7 +70,6 @@ func NewClient(ctx context.Context, addr string, key cipher.PubKey, sec cipher.S
 	mLog *logging.MasterLogger) (*Client, error) {
 	c := &Client{
 		client:         client,
-		reuseClient:    client,
 		key:            key,
 		sec:            sec,
 		addr:           sanitizedAddr(addr),
@@ -85,28 +87,6 @@ func NewClient(ctx context.Context, addr string, key cipher.PubKey, sec cipher.S
 	return c, nil
 }
 
-// Header returns headers for httpauth.
-func (c *Client) Header() (http.Header, error) {
-	nonce := c.getCurrentNonce()
-	body := make([]byte, 0)
-	sign, err := Sign(body, nonce, c.sec)
-	if err != nil {
-		return nil, err
-	}
-
-	header := make(http.Header)
-
-	// use nonce, later, if no err from req update such nonce
-	header.Set("SW-Nonce", strconv.FormatUint(uint64(nonce), 10))
-	header.Set("SW-Sig", sign.Hex())
-	header.Set("SW-Public", c.key.Hex())
-	if c.clientPublicIP != "" {
-		header.Set("SW-PublicIP", c.clientPublicIP)
-	}
-
-	return header, nil
-}
-
 // Do performs a new authenticated Request and returns the response. Internally, if the request was
 // successful nonce is incremented
 func (c *Client) Do(req *http.Request) (*http.Response, error) {
@@ -189,7 +169,7 @@ func (c *Client) Nonce(ctx context.Context, key cipher.PubKey) (Nonce, error) {
 	}()
 
 	if resp.StatusCode != http.StatusOK {
-		return 0, fmt.Errorf("error getting current nonce: status: %d <- %v", resp.StatusCode, extractError(resp.Body))
+		return 0, fmt.Errorf("error getting current nonce: status: %d <- %v", resp.StatusCode, extractHTTPError(resp.Body))
 	}
 
 	var nr NextNonceResponse
@@ -200,22 +180,6 @@ func (c *Client) Nonce(ctx context.Context, key cipher.PubKey) (Nonce, error) {
 	return nr.NextNonce, nil
 }
 
-// ReuseClient returns HTTP client that reuses port for dialing.
-func (c *Client) ReuseClient() *http.Client {
-	c.mu.Lock()
-	defer c.mu.Unlock()
-
-	return c.reuseClient
-}
-
-// SetTransport sets transport for HTTP client that reuses port for dialing.
-func (c *Client) SetTransport(transport http.RoundTripper) {
-	c.mu.Lock()
-	defer c.mu.Unlock()
-
-	c.reuseClient.Transport = transport
-}
-
 // SetNonce sets client current nonce to given nonce
 func (c *Client) SetNonce(n Nonce) {
 	atomic.StoreUint64(&c.nonce, uint64(n))
@@ -301,8 +265,8 @@ func sanitizedAddr(addr string) string {
 	return u.String()
 }
 
-// extractError returns the decoded error message from Body.
-func extractError(r io.Reader) error {
+// extractHTTPError returns the decoded error message from Body.
+func extractHTTPError(r io.Reader) error {
 	var serverError HTTPResponse
 
 	body, err := ioutil.ReadAll(r)
@@ -316,3 +280,19 @@ func extractError(r io.Reader) error {
 
 	return errors.New(serverError.Error.Message)
 }
+
+// ExtractError returns the decoded error message from Body.
+func ExtractError(r io.Reader) error {
+	var apiError Error
+
+	body, err := ioutil.ReadAll(r)
+	if err != nil {
+		return err
+	}
+
+	if err := json.Unmarshal(body, &apiError); err != nil {
+		return errors.New(string(body))
+	}
+
+	return errors.New(apiError.Error)
+}

internal/httpauth/nonce.go

@@ -0,0 +1,22 @@
+package httpauth
+
+import (
+	"fmt"
+
+	"github.com/skycoin/dmsg/cipher"
+)
+
+// Nonce is used to sign requests in order to avoid replay attack
+type Nonce uint64
+
+func (n Nonce) String() string { return fmt.Sprintf("%d", n) }
+
+// PayloadWithNonce returns the concatenation of payload and nonce.
+func PayloadWithNonce(payload []byte, nonce Nonce) []byte {
+	return []byte(fmt.Sprintf("%s%d", string(payload), nonce))
+}
+
+// Sign signs the Hash of payload and nonce
+func Sign(payload []byte, nonce Nonce, sec cipher.SecKey) (cipher.Sig, error) {
+	return cipher.SignPayload(PayloadWithNonce(payload, nonce), sec)
+}

internal/testhelpers/testhelpers.go

@@ -3,34 +3,10 @@ package testhelpers
 
 import (
 	"errors"
-	"testing"
-	"time"
-
-	"github.com/stretchr/testify/require"
 )
 
-const timeout = 5 * time.Second
-
 // NoErr is used with the mock interface to return from its methods.
 var NoErr error
 
 // Err is used with the mock interface to return some error from its methods.
 var Err = errors.New("error")
-
-// WithinTimeout tries to read an error from error channel within timeout and returns it.
-// If timeout exceeds, nil value is returned.
-func WithinTimeout(ch <-chan error) error {
-	select {
-	case err := <-ch:
-		return err
-	case <-time.After(timeout):
-		return nil
-	}
-}
-
-// NoErrorN performs require.NoError on multiple errors
-func NoErrorN(t *testing.T, errs ...error) {
-	for _, err := range errs {
-		require.NoError(t, err)
-	}
-}

internal/utclient/client.go

@@ -4,11 +4,7 @@ package utclient
 import (
 	"bytes"
 	"context"
-	"encoding/json"
-	"errors"
 	"fmt"
-	"io"
-	"io/ioutil"
 	"net/http"
 	"time"
 
@@ -21,11 +17,6 @@ import (
 
 //go:generate mockery -name APIClient -case underscore -inpkg
 
-// Error is the object returned to the client when there's an error.
-type Error struct {
-	Error string `json:"error"`
-}
-
 // APIClient implements uptime tracker API client.
 type APIClient interface {
 	UpdateVisorUptime(context.Context) error
@@ -102,24 +93,8 @@ func (c *httpClient) UpdateVisorUptime(ctx context.Context) error {
 	}()
 
 	if resp.StatusCode != http.StatusOK {
-		return fmt.Errorf("status: %d, error: %w", resp.StatusCode, extractError(resp.Body))
+		return fmt.Errorf("status: %d, error: %w", resp.StatusCode, httpauth.ExtractError(resp.Body))
 	}
 
 	return nil
 }
-
-// extractError returns the decoded error message from Body.
-func extractError(r io.Reader) error {
-	var apiError Error
-
-	body, err := ioutil.ReadAll(r)
-	if err != nil {
-		return err
-	}
-
-	if err := json.Unmarshal(body, &apiError); err != nil {
-		return errors.New(string(body))
-	}
-
-	return errors.New(apiError.Error)
-}

internal/vpn/net.go

@@ -3,14 +3,8 @@ package vpn
 import (
 	"encoding/json"
 	"fmt"
-	"io"
 	"net"
 	"time"
-
-	"github.com/skycoin/dmsg/cipher"
-	"github.com/skycoin/dmsg/noise"
-
-	"github.com/skycoin/skywire/pkg/app/appnet"
 )
 
 // WriteJSONWithTimeout marshals `data` and sends it over the `conn` with the specified write `timeout`.
@@ -92,29 +86,3 @@ func ReadJSON(conn net.Conn, data interface{}) error {
 
 	return nil
 }
-
-// WrapRWWithNoise wraps `conn` with noise.
-func WrapRWWithNoise(conn net.Conn, initiator bool, pk cipher.PubKey, sk cipher.SecKey) (io.ReadWriter, error) {
-	remoteAddr, isAppConn := conn.RemoteAddr().(appnet.Addr)
-	if isAppConn {
-		ns, err := noise.New(noise.HandshakeKK, noise.Config{
-			LocalPK:   pk,
-			LocalSK:   sk,
-			RemotePK:  remoteAddr.PubKey,
-			Initiator: initiator,
-		})
-		if err != nil {
-			return nil, fmt.Errorf("failed to prepare stream noise object: %w", err)
-		}
-
-		rw := noise.NewReadWriter(conn, ns)
-		if err := rw.Handshake(HSTimeout); err != nil {
-			return nil, fmt.Errorf("error performing noise handshake: %w", err)
-		}
-
-		return rw, nil
-	}
-
-	// shouldn't happen, but no encryption in this case
-	return conn, nil
-}