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tls.go
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tls.go
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// This file is part of MinIO Orchestrator
// Copyright (c) 2020 MinIO, Inc.
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package restapi
import (
"crypto/tls"
"crypto/x509"
"fmt"
"io/ioutil"
"net"
"net/http"
"time"
)
var (
certDontExists = "File certificate doesn't exists: %s"
)
func prepareSTSClientTransport() *http.Transport {
// This takes github.com/minio/minio/pkg/madmin/transport.go as an example
//
// DefaultTransport - this default transport is similar to
// http.DefaultTransport but with additional param DisableCompression
// is set to true to avoid decompressing content with 'gzip' encoding.
DefaultTransport := &http.Transport{
Proxy: http.ProxyFromEnvironment,
DialContext: (&net.Dialer{
Timeout: 5 * time.Second,
KeepAlive: 15 * time.Second,
}).DialContext,
MaxIdleConns: 1024,
MaxIdleConnsPerHost: 1024,
ResponseHeaderTimeout: 60 * time.Second,
IdleConnTimeout: 60 * time.Second,
TLSHandshakeTimeout: 10 * time.Second,
ExpectContinueTimeout: 1 * time.Second,
DisableCompression: true,
}
// If Minio instance is running with TLS enabled and it's using a self-signed certificate
// or a certificate issued by a custom certificate authority we prepare a new custom *http.Transport
if getMinIOEndpointIsSecure() {
caCertFileNames := getMinioServerTLSRootCAs()
tlsConfig := &tls.Config{
// Can't use SSLv3 because of POODLE and BEAST
// Can't use TLSv1.0 because of POODLE and BEAST using CBC cipher
// Can't use TLSv1.1 because of RC4 cipher usage
MinVersion: tls.VersionTLS12,
}
// If CAs certificates are configured we save them to the http.Client RootCAs store
if len(caCertFileNames) > 0 {
certs := x509.NewCertPool()
for _, caCert := range caCertFileNames {
// Validate certificate exists
if FileExists(caCert) {
pemData, err := ioutil.ReadFile(caCert)
if err != nil {
// if there was an error reading pem file stop console
panic(err)
}
certs.AppendCertsFromPEM(pemData)
} else {
// if provided cert filename doesn't exists stop console
panic(fmt.Sprintf(certDontExists, caCert))
}
}
tlsConfig.RootCAs = certs
}
DefaultTransport.TLSClientConfig = tlsConfig
}
return DefaultTransport
}
// PrepareSTSClient returns an http.Client with custom configurations need it by *credentials.STSAssumeRole
// custom configurations include the use of CA certificates
func PrepareSTSClient() *http.Client {
transport := prepareSTSClientTransport()
// Return http client with default configuration
return &http.Client{
Transport: transport,
}
}