/
mysql.go
153 lines (117 loc) · 3.06 KB
/
mysql.go
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package drivers
import (
"bytes"
"crypto/tls"
"crypto/x509"
"fmt"
"io/ioutil"
"net"
"github.com/geckoboard/sql-dataset/models"
msql "github.com/go-sql-driver/mysql"
)
/*
SSL Supported Modes
https://github.com/go-sql-driver/mysql#tls
false - no SSL (default)
true - use ssl connection
skip-verify - use self-signed or invalid server cert
customCert - name of the registered tls config (automatic when supplying ssl (ca,cert,key)
*/
type mysql struct{}
const (
mysqlTLSKey = "customCert"
mysqlPort = "3306"
)
func (m mysql) Build(dc *models.DatabaseConfig) (string, error) {
var buf bytes.Buffer
m.setDefaults(dc)
if dc.Database == "" {
return "", errDatabaseRequired
}
if dc.Username == "" {
return "", errUsernameRequired
}
if dc.TLSConfig != nil {
str, err := m.registerTLS(dc.TLSConfig)
if err != nil {
return "", err
}
dc.Params["tls"] = str
}
keys := orderKeys(dc.Params)
for _, k := range keys {
buildParams(&buf, fmt.Sprintf("%s=%s", k, dc.Params[k]))
}
return fmt.Sprintf("%s?%s", m.buildConnString(dc), buf.String()), nil
}
func (m mysql) loadCerts(keyFile, certFile, caFile string) (*x509.CertPool, []tls.Certificate, error) {
var rootCertPool *x509.CertPool
if caFile != "" {
rootCertPool = x509.NewCertPool()
pem, err := ioutil.ReadFile(caFile)
if err != nil {
return nil, nil, err
}
if ok := rootCertPool.AppendCertsFromPEM(pem); !ok {
return nil, nil, fmt.Errorf("SSL error: Failed to append PEM. " +
"Please check that it's a valid CA certificate.")
}
}
var clientCert []tls.Certificate
if certFile != "" && keyFile != "" {
certs, err := tls.LoadX509KeyPair(certFile, keyFile)
if err != nil {
return nil, nil, fmt.Errorf("There was an error while "+
"loading your x509 key pair: %s", err)
}
clientCert = append(clientCert, certs)
}
return rootCertPool, clientCert, nil
}
func (m mysql) registerTLS(tlsConfig *models.TLSConfig) (string, error) {
if tlsConfig.KeyFile == "" && tlsConfig.CertFile == "" &&
tlsConfig.CAFile == "" && tlsConfig.SSLMode != "" {
return tlsConfig.SSLMode, nil
}
rootCertPool, clientCert, err := m.loadCerts(
tlsConfig.KeyFile,
tlsConfig.CertFile,
tlsConfig.CAFile,
)
if err != nil {
return "", err
}
return mysqlTLSKey, msql.RegisterTLSConfig(mysqlTLSKey, &tls.Config{
RootCAs: rootCertPool,
Certificates: clientCert,
})
}
func (m mysql) buildConnString(dc *models.DatabaseConfig) string {
var auth, netHost string
if dc.Password == "" {
auth = dc.Username
} else {
auth = fmt.Sprintf("%s:%s", dc.Username, dc.Password)
}
if dc.Protocol == tcpConn {
netHost = net.JoinHostPort(dc.Host, dc.Port)
} else {
netHost = dc.Host
}
return fmt.Sprintf("%s@%s(%s)/%s", auth, dc.Protocol, netHost, dc.Database)
}
func (m mysql) setDefaults(dc *models.DatabaseConfig) {
if dc.Params == nil {
dc.Params = make(map[string]string)
}
if dc.Host == "" {
dc.Host = defaultHost
}
if dc.Protocol == "" {
dc.Protocol = tcpConn
}
if dc.Port == "" && dc.Protocol == tcpConn {
dc.Port = mysqlPort
}
dc.Params["parseTime"] = "true"
}