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http.go
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http.go
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package flags
import (
"crypto/tls"
"crypto/x509"
"fmt"
"io/ioutil"
"os"
"github.com/consensys/quorum-key-manager/pkg/http/server"
"github.com/spf13/pflag"
"github.com/spf13/viper"
)
func init() {
viper.SetDefault(httpPortViperKey, httpPortDefault)
_ = viper.BindEnv(httpPortViperKey, httpPortEnv)
viper.SetDefault(healthPortViperKey, healthPortDefault)
_ = viper.BindEnv(healthPortViperKey, healthPortEnv)
viper.SetDefault(httpHostViperKey, httpHostDefault)
_ = viper.BindEnv(httpHostViperKey, httpHostEnv)
viper.SetDefault(enableHTTPSViperKey, enableHTTPSDefault)
_ = viper.BindEnv(enableHTTPSViperKey, enableHTTPSEnv)
viper.SetDefault(httpServerKeyViperKey, httpServerKeyDefault)
_ = viper.BindEnv(httpServerKeyViperKey, httpServerKeyEnv)
viper.SetDefault(httpServerCertViperKey, httpServerCertDefault)
_ = viper.BindEnv(httpServerCertViperKey, httpServerCertEnv)
}
const (
httpPortFlag = "http-port"
httpPortViperKey = "http.port"
httpPortDefault = 8080
httpPortEnv = "HTTP_PORT"
)
func httpPort(f *pflag.FlagSet) {
desc := fmt.Sprintf(`Port to expose API HTTP service
Environment variable: %q`, httpPortEnv)
f.Uint32(httpPortFlag, httpPortDefault, desc)
_ = viper.BindPFlag(httpPortViperKey, f.Lookup(httpPortFlag))
}
const (
healthPortFlag = "health-port"
healthPortViperKey = "health.port"
healthPortDefault = 8081
healthPortEnv = "HEALTH_PORT"
)
func healthPort(f *pflag.FlagSet) {
desc := fmt.Sprintf(`Port to expose Health HTTP service
Environment variable: %q`, healthPortEnv)
f.Uint32(healthPortFlag, healthPortDefault, desc)
_ = viper.BindPFlag(healthPortViperKey, f.Lookup(healthPortFlag))
}
const (
httpHostFlag = "http-host"
httpHostViperKey = "http.host"
httpHostDefault = ""
httpHostEnv = "HTTP_HOST"
)
// Hostname register a flag for HTTP server address
func httpHost(f *pflag.FlagSet) {
desc := fmt.Sprintf(`Host to expose HTTP service
Environment variable: %q`, httpHostEnv)
f.String(httpHostFlag, httpHostDefault, desc)
_ = viper.BindPFlag(httpHostViperKey, f.Lookup(httpHostFlag))
}
const (
enableHTTPSFlag = "https-enable"
enableHTTPSViperKey = "https-enable"
enableHTTPSDefault = false
enableHTTPSEnv = "HTTPS_ENABLED"
)
// Hostname register a flag for HTTP server address
func enableHTTPS(f *pflag.FlagSet) {
desc := fmt.Sprintf(`Enable https server
Environment variable: %q`, enableHTTPSEnv)
f.Bool(enableHTTPSFlag, enableHTTPSDefault, desc)
_ = viper.BindPFlag(enableHTTPSViperKey, f.Lookup(enableHTTPSFlag))
}
const (
httpServerKeyFlag = "https-server-key"
httpServerKeyViperKey = "https.server.key"
httpServerKeyDefault = ""
httpServerKeyEnv = "HTTPS_SERVER_KEY"
)
func httpServerKey(f *pflag.FlagSet) {
desc := fmt.Sprintf(`TLS key file location
Environment variable: %q`, httpServerKeyEnv)
f.String(httpServerKeyFlag, httpServerKeyDefault, desc)
_ = viper.BindPFlag(httpServerKeyViperKey, f.Lookup(httpServerKeyFlag))
}
const (
httpServerCertFlag = "https-server-cert"
httpServerCertViperKey = "https.server.cert"
httpServerCertDefault = ""
httpServerCertEnv = "HTTPS_SERVER_CERT"
)
func httpServerCert(f *pflag.FlagSet) {
desc := fmt.Sprintf(`TLS cert file location
Environment variable: %q`, httpServerCertEnv)
f.String(httpServerCertFlag, httpServerCertDefault, desc)
_ = viper.BindPFlag(httpServerCertViperKey, f.Lookup(httpServerCertFlag))
}
// HTTPFlags register flags for HTTPS server
func HTTPFlags(f *pflag.FlagSet) {
httpHost(f)
httpPort(f)
healthPort(f)
enableHTTPS(f)
httpServerCert(f)
httpServerKey(f)
}
func newHTTPConfig(vipr *viper.Viper) (*server.Config, error) {
cfg := server.NewDefaultConfig()
cfg.Port = vipr.GetUint32(httpPortViperKey)
cfg.HealthzPort = vipr.GetUint32(healthPortViperKey)
cfg.Host = vipr.GetString(httpHostViperKey)
isSSL := vipr.GetBool(enableHTTPSViperKey)
if isSSL {
cfg.TLSConfig = &tls.Config{
MinVersion: tls.VersionTLS13,
ClientAuth: tls.VerifyClientCertIfGiven,
PreferServerCipherSuites: true,
}
certFile := vipr.GetString(httpServerCertViperKey)
keyFile := vipr.GetString(httpServerKeyViperKey)
var err error
cfg.TLSConfig.Certificates = make([]tls.Certificate, 1)
cfg.TLSConfig.Certificates[0], err = tls.LoadX509KeyPair(certFile, keyFile)
if err != nil {
return nil, fmt.Errorf("failed to read http ssl certificates '%s' or '%s': %w", certFile, keyFile, err)
}
clientCAPool, err := clientCAPool(vipr)
if err != nil {
return nil, err
} else if clientCAPool != nil {
cfg.TLSConfig.ClientCAs = clientCAPool
}
}
return cfg, nil
}
func clientCAPool(vipr *viper.Viper) (*x509.CertPool, error) {
caFile := vipr.GetString(authTLSCertsFileViperKey)
if caFile == "" {
return nil, nil
}
_, err := os.Stat(caFile)
if err != nil {
return nil, fmt.Errorf("failed to read client ca file. %s", err.Error())
}
caFileContent, err := ioutil.ReadFile(caFile)
if err != nil {
return nil, err
}
caCertPool := x509.NewCertPool()
caCertPool.AppendCertsFromPEM(caFileContent)
return caCertPool, nil
}