109 lines
2.2 KiB
Go
109 lines
2.2 KiB
Go
package server
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import (
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"bytes"
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"crypto/ecdsa"
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"crypto/tls"
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"crypto/x509"
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"encoding/pem"
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"fmt"
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"io/ioutil"
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"net/http"
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"net/url"
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)
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type PairingClient struct {
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*http.Client
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PayloadManager
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baseAddress *url.URL
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certPEM []byte
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serverPK *ecdsa.PublicKey
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serverMode Mode
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serverCert *x509.Certificate
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}
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func NewPairingClient(c *ConnectionParams, config *PairingPayloadManagerConfig) (*PairingClient, error) {
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u, err := c.URL()
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if err != nil {
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return nil, err
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}
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serverCert, err := getServerCert(u)
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if err != nil {
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return nil, err
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}
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err = verifyCert(serverCert, c.publicKey)
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if err != nil {
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return nil, err
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}
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certPem := pem.EncodeToMemory(&pem.Block{Type: "CERTIFICATE", Bytes: serverCert.Raw})
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rootCAs, err := x509.SystemCertPool()
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if err != nil {
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return nil, err
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}
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if ok := rootCAs.AppendCertsFromPEM(certPem); !ok {
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return nil, fmt.Errorf("failed to append certPem to rootCAs")
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}
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tr := &http.Transport{
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TLSClientConfig: &tls.Config{
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MinVersion: tls.VersionTLS12,
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InsecureSkipVerify: false, // MUST BE FALSE
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RootCAs: rootCAs,
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},
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}
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pm, err := NewPairingPayloadManager(c.aesKey, config)
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if err != nil {
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return nil, err
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}
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return &PairingClient{
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Client: &http.Client{Transport: tr},
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baseAddress: u,
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certPEM: certPem,
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serverCert: serverCert,
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serverPK: c.publicKey,
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serverMode: c.serverMode,
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PayloadManager: pm,
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}, nil
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}
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func (c *PairingClient) PairAccount() error {
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switch c.serverMode {
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case Receiving:
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return c.sendAccountData()
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case Sending:
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return c.receiveAccountData()
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default:
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return fmt.Errorf("unrecognised server mode '%d'", c.serverMode)
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}
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}
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func (c *PairingClient) sendAccountData() error {
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c.baseAddress.Path = pairingReceive
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_, err := c.Post(c.baseAddress.String(), "application/octet-stream", bytes.NewBuffer(c.PayloadManager.ToSend()))
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if err != nil {
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return err
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}
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return nil
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}
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func (c *PairingClient) receiveAccountData() error {
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c.baseAddress.Path = pairingSend
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resp, err := c.Get(c.baseAddress.String())
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if err != nil {
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return err
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}
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payload, err := ioutil.ReadAll(resp.Body)
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if err != nil {
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return err
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}
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return c.PayloadManager.Receive(payload)
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}
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