func (manager *CloudFrontManager) Init() error {
// Read the private key
pemData, err := ioutil.ReadFile(manager.PrivateKeyFile)
if err != nil {
log.Fatalf("read key file: %s", err)
return err
}
// Extract the PEM-encoded data block
block, _ := pem.Decode(pemData)
if block == nil {
log.Fatalf("bad key data: %s", "not PEM-encoded")
return err
}
if got, want := block.Type, "RSA PRIVATE KEY"; got != want {
log.Fatalf("unknown key type %q, want %q", got, want)
return err
}
// Decode the RSA private key
privKey, err := x509.ParsePKCS1PrivateKey(block.Bytes)
if err != nil {
log.Fatalf("bad private key: %s", err)
return err
}
manager.key = privKey
manager.urlSigner = sign.NewURLSigner(manager.KeyId, privKey)
return nil
}
// newCloudFrontLayerHandler constructs and returns a new CloudFront
// LayerHandler implementation.
// Required options: baseurl, privatekey, keypairid
func newCloudFrontStorageMiddleware(storageDriver storagedriver.StorageDriver, options map[string]interface{}) (storagedriver.StorageDriver, error) {
base, ok := options["baseurl"]
if !ok {
return nil, fmt.Errorf("no baseurl provided")
}
baseURL, ok := base.(string)
if !ok {
return nil, fmt.Errorf("baseurl must be a string")
}
if !strings.Contains(baseURL, "://") {
baseURL = "https://" + baseURL
}
if !strings.HasSuffix(baseURL, "/") {
baseURL += "/"
}
if _, err := url.Parse(baseURL); err != nil {
return nil, fmt.Errorf("invalid baseurl: %v", err)
}
pk, ok := options["privatekey"]
if !ok {
return nil, fmt.Errorf("no privatekey provided")
}
pkPath, ok := pk.(string)
if !ok {
return nil, fmt.Errorf("privatekey must be a string")
}
kpid, ok := options["keypairid"]
if !ok {
return nil, fmt.Errorf("no keypairid provided")
}
keypairID, ok := kpid.(string)
if !ok {
return nil, fmt.Errorf("keypairid must be a string")
}
pkBytes, err := ioutil.ReadFile(pkPath)
if err != nil {
return nil, fmt.Errorf("failed to read privatekey file: %s", err)
}
block, _ := pem.Decode([]byte(pkBytes))
if block == nil {
return nil, fmt.Errorf("failed to decode private key as an rsa private key")
}
privateKey, err := x509.ParsePKCS1PrivateKey(block.Bytes)
if err != nil {
return nil, err
}
urlSigner := sign.NewURLSigner(keypairID, privateKey)
duration := 20 * time.Minute
d, ok := options["duration"]
if ok {
switch d := d.(type) {
case time.Duration:
duration = d
case string:
dur, err := time.ParseDuration(d)
if err != nil {
return nil, fmt.Errorf("invalid duration: %s", err)
}
duration = dur
}
}
return &cloudFrontStorageMiddleware{
StorageDriver: storageDriver,
urlSigner: urlSigner,
baseURL: baseURL,
duration: duration,
}, nil
}