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f369fdf6f2
In this mode, TLS is susceptible to man-in-the-middle attacks. This should be used only for testing.
92 lines
3 KiB
Go
92 lines
3 KiB
Go
package httpclient
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import (
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"crypto/tls"
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"crypto/x509"
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"io/ioutil"
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"net/http"
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"path/filepath"
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"time"
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"github.com/drakkan/sftpgo/logger"
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"github.com/drakkan/sftpgo/utils"
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)
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// Config defines the configuration for HTTP clients.
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// HTTP clients are used for executing hooks such as the ones used for
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// custom actions, external authentication and pre-login user modifications
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type Config struct {
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// Timeout specifies a time limit, in seconds, for requests
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Timeout int64 `json:"timeout" mapstructure:"timeout"`
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// CACertificates defines extra CA certificates to trust.
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// The paths can be absolute or relative to the config dir.
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// Adding trusted CA certificates is a convenient way to use self-signed
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// certificates without defeating the purpose of using TLS
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CACertificates []string `json:"ca_certificates" mapstructure:"ca_certificates"`
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// if enabled the HTTP client accepts any TLS certificate presented by
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// the server and any host name in that certificate.
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// In this mode, TLS is susceptible to man-in-the-middle attacks.
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// This should be used only for testing.
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SkipTLSVerify bool `json:"skip_tls_verify" mapstructure:"skip_tls_verify"`
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customTransport *http.Transport
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}
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const logSender = "httpclient"
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var httpConfig Config
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// Initialize configures HTTP clients
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func (c Config) Initialize(configDir string) {
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httpConfig = c
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rootCAs := c.loadCACerts(configDir)
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customTransport := http.DefaultTransport.(*http.Transport).Clone()
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if customTransport.TLSClientConfig != nil {
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customTransport.TLSClientConfig.RootCAs = rootCAs
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} else {
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customTransport.TLSClientConfig = &tls.Config{
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RootCAs: rootCAs,
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}
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}
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customTransport.TLSClientConfig.InsecureSkipVerify = c.SkipTLSVerify
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httpConfig.customTransport = customTransport
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}
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// loadCACerts returns system cert pools and try to add the configured
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// CA certificates to it
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func (c Config) loadCACerts(configDir string) *x509.CertPool {
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rootCAs, err := x509.SystemCertPool()
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if err != nil {
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rootCAs = x509.NewCertPool()
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}
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for _, ca := range c.CACertificates {
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if !utils.IsFileInputValid(ca) {
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logger.Warn(logSender, "", "unable to load invalid CA certificate: %#v", ca)
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logger.WarnToConsole("unable to load invalid CA certificate: %#v", ca)
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continue
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}
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if !filepath.IsAbs(ca) {
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ca = filepath.Join(configDir, ca)
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}
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certs, err := ioutil.ReadFile(ca)
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if err != nil {
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logger.Warn(logSender, "", "unable to load CA certificate: %v", err)
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logger.WarnToConsole("unable to load CA certificate: %#v", err)
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}
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if rootCAs.AppendCertsFromPEM(certs) {
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logger.Debug(logSender, "", "CA certificate %#v added to the trusted certificates", ca)
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} else {
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logger.Warn(logSender, "", "unable to add CA certificate %#v to the trusted cetificates", ca)
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logger.WarnToConsole("unable to add CA certificate %#v to the trusted cetificates", ca)
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}
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}
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return rootCAs
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}
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// GetHTTPClient returns an HTTP client with the configured parameters
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func GetHTTPClient() *http.Client {
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return &http.Client{
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Timeout: time.Duration(httpConfig.Timeout) * time.Second,
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Transport: httpConfig.customTransport,
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}
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}
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