114 lines
3.2 KiB
Go
114 lines
3.2 KiB
Go
/*
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* Copyright 2022 The Dragonfly Authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package rpc
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import (
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"crypto/tls"
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"crypto/x509"
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"errors"
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"fmt"
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"os"
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"time"
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"google.golang.org/grpc/credentials"
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"google.golang.org/grpc/credentials/insecure"
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)
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// NewServerCredentials creates a new server credentials with the given ca certificate, certificate and key.
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func NewServerCredentials(caCertFile string, certFile string, keyFile string) (credentials.TransportCredentials, error) {
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cert, err := tls.LoadX509KeyPair(certFile, keyFile)
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if err != nil {
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return nil, fmt.Errorf("failed to load server certificate: %v", err)
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}
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caCertPool := x509.NewCertPool()
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caCertBytes, err := os.ReadFile(caCertFile)
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if err != nil {
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return nil, fmt.Errorf("failed to read ca certificate: %v", err)
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}
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if !caCertPool.AppendCertsFromPEM(caCertBytes) {
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return nil, errors.New("failed to append ca certificate")
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}
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return credentials.NewTLS(&tls.Config{
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ClientCAs: caCertPool,
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Certificates: []tls.Certificate{cert},
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ClientAuth: tls.RequireAndVerifyClientCert,
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}), nil
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}
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// NewClientCredentials creates a new client credentials with the given ca certificate, certificate and key.
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func NewClientCredentials(caCertFile string, certFile string, keyFile string) (credentials.TransportCredentials, error) {
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cert, err := tls.LoadX509KeyPair(certFile, keyFile)
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if err != nil {
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return nil, fmt.Errorf("failed to load client certificate: %v", err)
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}
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caCertPool := x509.NewCertPool()
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caCertBytes, err := os.ReadFile(caCertFile)
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if err != nil {
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return nil, fmt.Errorf("failed to read ca certificate: %v", err)
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}
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if !caCertPool.AppendCertsFromPEM(caCertBytes) {
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return nil, errors.New("failed to append ca certificate")
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}
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return credentials.NewTLS(&tls.Config{
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RootCAs: caCertPool,
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Certificates: []tls.Certificate{cert},
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VerifyPeerCertificate: func(rawCerts [][]byte, verifiedChains [][]*x509.Certificate) error {
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// Parse the raw certificates.
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certs := make([]*x509.Certificate, len(rawCerts))
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for i, rawCert := range rawCerts {
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cert, err := x509.ParseCertificate(rawCert)
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if err != nil {
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return err
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}
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certs[i] = cert
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}
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// Verify the certificate chain.
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opts := x509.VerifyOptions{
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Roots: caCertPool,
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CurrentTime: time.Now(),
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// Skip hostname verification.
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DNSName: "",
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Intermediates: x509.NewCertPool(),
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}
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for i, cert := range certs {
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if i == 0 {
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continue
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}
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opts.Intermediates.AddCert(cert)
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}
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_, err := certs[0].Verify(opts)
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return err
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},
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}), nil
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}
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// NewInsecureCredentials creates a new insecure credentials.
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func NewInsecureCredentials() credentials.TransportCredentials {
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return insecure.NewCredentials()
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}
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