status-go/server/client.go

159 lines
3.2 KiB
Go

package server
import (
"bytes"
"crypto/ecdsa"
"crypto/tls"
"crypto/x509"
"encoding/pem"
"fmt"
"io/ioutil"
"net/http"
"net/http/cookiejar"
"net/url"
"github.com/btcsuite/btcutil/base58"
)
type PairingClient struct {
*http.Client
PayloadManager
baseAddress *url.URL
certPEM []byte
serverPK *ecdsa.PublicKey
serverMode Mode
serverCert *x509.Certificate
serverChallenge []byte
}
func NewPairingClient(c *ConnectionParams, config *PairingPayloadManagerConfig) (*PairingClient, error) {
u, err := c.URL()
if err != nil {
return nil, err
}
serverCert, err := getServerCert(u)
if err != nil {
return nil, err
}
err = verifyCert(serverCert, c.publicKey)
if err != nil {
return nil, err
}
certPem := pem.EncodeToMemory(&pem.Block{Type: "CERTIFICATE", Bytes: serverCert.Raw})
rootCAs, err := x509.SystemCertPool()
if err != nil {
return nil, err
}
if ok := rootCAs.AppendCertsFromPEM(certPem); !ok {
return nil, fmt.Errorf("failed to append certPem to rootCAs")
}
tr := &http.Transport{
TLSClientConfig: &tls.Config{
MinVersion: tls.VersionTLS12,
InsecureSkipVerify: false, // MUST BE FALSE
RootCAs: rootCAs,
},
}
cj, err := cookiejar.New(nil)
if err != nil {
return nil, err
}
pm, err := NewPairingPayloadManager(c.aesKey, config)
if err != nil {
return nil, err
}
return &PairingClient{
Client: &http.Client{Transport: tr, Jar: cj},
baseAddress: u,
certPEM: certPem,
serverCert: serverCert,
serverPK: c.publicKey,
serverMode: c.serverMode,
PayloadManager: pm,
}, nil
}
func (c *PairingClient) PairAccount() error {
switch c.serverMode {
case Receiving:
return c.sendAccountData()
case Sending:
err := c.getChallenge()
if err != nil {
return err
}
return c.receiveAccountData()
default:
return fmt.Errorf("unrecognised server mode '%d'", c.serverMode)
}
}
func (c *PairingClient) sendAccountData() error {
c.baseAddress.Path = pairingReceive
resp, err := c.Post(c.baseAddress.String(), "application/octet-stream", bytes.NewBuffer(c.PayloadManager.ToSend()))
if err != nil {
return err
}
if resp.StatusCode != http.StatusOK {
return fmt.Errorf("status not ok, received '%s'", resp.Status)
}
return nil
}
func (c *PairingClient) receiveAccountData() error {
c.baseAddress.Path = pairingSend
req, err := http.NewRequest(http.MethodGet, c.baseAddress.String(), nil)
if err != nil {
return err
}
if c.serverChallenge != nil {
ec, err := c.PayloadManager.EncryptPlain(c.serverChallenge)
if err != nil {
return err
}
req.Header.Set(sessionChallenge, base58.Encode(ec))
}
resp, err := c.Do(req)
if err != nil {
return err
}
if resp.StatusCode != http.StatusOK {
return fmt.Errorf("status not ok, received '%s'", resp.Status)
}
payload, err := ioutil.ReadAll(resp.Body)
if err != nil {
return err
}
return c.PayloadManager.Receive(payload)
}
func (c *PairingClient) getChallenge() error {
c.baseAddress.Path = pairingChallenge
resp, err := c.Get(c.baseAddress.String())
if err != nil {
return err
}
if resp.StatusCode != http.StatusOK {
return fmt.Errorf("status not ok, received '%s'", resp.Status)
}
c.serverChallenge, err = ioutil.ReadAll(resp.Body)
return err
}