23617f287f
- Adding a command line option for users to enforce tls/ssl connections for the applier, inspector, and binlog reader. - The user can optionally request server certificate verification through a command line option to specify the ca cert via a file path. - Fixes an existing bug appending the timeout option to the singleton applier connection.
103 lines
2.7 KiB
Go
103 lines
2.7 KiB
Go
/*
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Copyright 2016 GitHub Inc.
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See https://github.com/github/gh-ost/blob/master/LICENSE
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*/
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package mysql
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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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"io/ioutil"
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"net"
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"github.com/go-sql-driver/mysql"
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)
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// ConnectionConfig is the minimal configuration required to connect to a MySQL server
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type ConnectionConfig struct {
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Key InstanceKey
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User string
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Password string
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ImpliedKey *InstanceKey
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tlsConfig *tls.Config
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}
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func NewConnectionConfig() *ConnectionConfig {
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config := &ConnectionConfig{
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Key: InstanceKey{},
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}
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config.ImpliedKey = &config.Key
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return config
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}
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// DuplicateCredentials creates a new connection config with given key and with same credentials as this config
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func (this *ConnectionConfig) DuplicateCredentials(key InstanceKey) *ConnectionConfig {
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config := &ConnectionConfig{
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Key: key,
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User: this.User,
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Password: this.Password,
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tlsConfig: this.tlsConfig,
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}
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config.ImpliedKey = &config.Key
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return config
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}
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func (this *ConnectionConfig) Duplicate() *ConnectionConfig {
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return this.DuplicateCredentials(this.Key)
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}
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func (this *ConnectionConfig) String() string {
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return fmt.Sprintf("%s, user=%s, usingTLS=%t", this.Key.DisplayString(), this.User, this.tlsConfig != nil)
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}
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func (this *ConnectionConfig) Equals(other *ConnectionConfig) bool {
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return this.Key.Equals(&other.Key) || this.ImpliedKey.Equals(other.ImpliedKey)
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}
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func (this *ConnectionConfig) UseTLS(caCertificatePath string) error {
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skipVerify := caCertificatePath == ""
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var rootCertPool *x509.CertPool
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if !skipVerify {
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rootCertPool = x509.NewCertPool()
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pem, err := ioutil.ReadFile(caCertificatePath)
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if err != nil {
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return err
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}
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if ok := rootCertPool.AppendCertsFromPEM(pem); !ok {
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return errors.New("could not add ca certificate to cert pool")
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}
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}
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this.tlsConfig = &tls.Config{
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RootCAs: rootCertPool,
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InsecureSkipVerify: skipVerify,
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}
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if err := mysql.RegisterTLSConfig(this.Key.StringCode(), this.tlsConfig); 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 (this *ConnectionConfig) TLSConfig() *tls.Config {
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return this.tlsConfig
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}
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func (this *ConnectionConfig) GetDBUri(databaseName string) string {
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hostname := this.Key.Hostname
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var ip = net.ParseIP(hostname)
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if (ip != nil) && (ip.To4() == nil) {
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// Wrap IPv6 literals in square brackets
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hostname = fmt.Sprintf("[%s]", hostname)
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}
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interpolateParams := true
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tlsOption := "false"
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if this.tlsConfig != nil {
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tlsOption = this.Key.StringCode()
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}
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return fmt.Sprintf("%s:%s@tcp(%s:%d)/%s?interpolateParams=%t&autocommit=true&charset=utf8mb4,utf8,latin1&tls=%s", this.User, this.Password, hostname, this.Key.Port, databaseName, interpolateParams, tlsOption)
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}
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