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credential.go
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credential.go
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/*
* Copyright 2022 The Dragonfly Authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package rpc
import (
"crypto/tls"
"crypto/x509"
"errors"
"fmt"
"github.com/johanbrandhorst/certify"
"google.golang.org/grpc/credentials"
"d7y.io/dragonfly/v2/pkg/net/ip"
)
const (
// ForceTLSPolicy is both ClientHandshake and
// ServerHandshake are only support tls.
ForceTLSPolicy = "force"
// PreferTLSPolicy is ServerHandshake supports tls and
// insecure (non-tls), ClientHandshake will only support tls.
PreferTLSPolicy = "prefer"
// DefaultTLSPolicy is ServerHandshake supports tls
// and insecure (non-tls), ClientHandshake will only support tls.
DefaultTLSPolicy = "default"
)
// NewServerCredentialsByCertify returns server transport credentials by certify.
func NewServerCredentialsByCertify(tlsPolicy string, tlsVerify bool, pemClientCAs []byte, certifyClient *certify.Certify) (credentials.TransportCredentials, error) {
certPool := x509.NewCertPool()
if !certPool.AppendCertsFromPEM(pemClientCAs) {
return nil, errors.New("invalid CA Cert")
}
tlsConfig := &tls.Config{
GetCertificate: func(hello *tls.ClientHelloInfo) (*tls.Certificate, error) {
if hello.ServerName == "" {
hello.ServerName = ip.IPv4
}
return certifyClient.GetCertificate(hello)
},
ClientCAs: certPool,
}
if tlsVerify {
tlsConfig.ClientAuth = tls.RequireAndVerifyClientCert
}
switch tlsPolicy {
case DefaultTLSPolicy, PreferTLSPolicy:
return NewMuxTransportCredentials(tlsConfig,
WithTLSPreferClientHandshake(tlsPolicy == PreferTLSPolicy)), nil
case ForceTLSPolicy:
return credentials.NewTLS(tlsConfig), nil
default:
return nil, fmt.Errorf("invalid tlsPolicy: %s", tlsPolicy)
}
}
// NewClientCredentialsByCertify returns client transport credentials by certify.
func NewClientCredentialsByCertify(tlsPolicy string, pemRootCAs []byte, certifyClient *certify.Certify) (credentials.TransportCredentials, error) {
certPool := x509.NewCertPool()
if !certPool.AppendCertsFromPEM(pemRootCAs) {
return nil, errors.New("invalid CA Cert")
}
tlsConfig := &tls.Config{
GetClientCertificate: certifyClient.GetClientCertificate,
RootCAs: certPool,
}
switch tlsPolicy {
case DefaultTLSPolicy, PreferTLSPolicy:
return NewMuxTransportCredentials(tlsConfig,
WithTLSPreferClientHandshake(tlsPolicy == PreferTLSPolicy)), nil
case ForceTLSPolicy:
return credentials.NewTLS(tlsConfig), nil
default:
return nil, fmt.Errorf("invalid tlsPolicy: %s", tlsPolicy)
}
}
// NewClientCredentials returns client transport credentials.
func NewClientCredentials(tlsPolicy string, certs []tls.Certificate, pemRootCAs []byte) (credentials.TransportCredentials, error) {
certPool := x509.NewCertPool()
if !certPool.AppendCertsFromPEM(pemRootCAs) {
return nil, errors.New("invalid CA Cert")
}
tlsConfig := &tls.Config{
RootCAs: certPool,
}
if len(certs) > 0 {
tlsConfig.Certificates = certs
}
switch tlsPolicy {
case DefaultTLSPolicy, PreferTLSPolicy:
return NewMuxTransportCredentials(tlsConfig,
WithTLSPreferClientHandshake(tlsPolicy == PreferTLSPolicy)), nil
case ForceTLSPolicy:
return credentials.NewTLS(tlsConfig), nil
default:
return nil, fmt.Errorf("invalid tlsPolicy: %s", tlsPolicy)
}
}