// Extra method - Do a TLS Handshake and record progress
func (c *Conn) TLSHandshake() error {
if c.isTls {
return fmt.Errorf(
"Attempted repeat handshake with remote host %s",
c.RemoteAddr().String())
}
tlsConfig := new(ztls.Config)
tlsConfig.InsecureSkipVerify = true
tlsConfig.MinVersion = ztls.VersionSSL30
tlsConfig.MaxVersion = c.maxTlsVersion
tlsConfig.RootCAs = c.caPool
tlsConfig.HeartbeatEnabled = true
tlsConfig.ClientDSAEnabled = true
if !c.noSNI && c.domain != "" {
tlsConfig.ServerName = c.domain
}
if c.onlyDHE {
tlsConfig.CipherSuites = ztls.DHECiphers
}
if c.onlyExports {
tlsConfig.CipherSuites = ztls.RSA512ExportCiphers
}
if c.onlyExportsDH {
tlsConfig.CipherSuites = ztls.DHEExportCiphers
}
if c.chromeCiphers {
tlsConfig.CipherSuites = ztls.ChromeCiphers
}
if c.chromeNoDHE {
tlsConfig.CipherSuites = ztls.ChromeNoDHECiphers
}
if c.firefoxCiphers {
tlsConfig.CipherSuites = ztls.FirefoxCiphers
}
if c.firefoxNoDHECiphers {
tlsConfig.CipherSuites = ztls.FirefoxNoDHECiphers
}
if c.safariCiphers {
tlsConfig.CipherSuites = ztls.SafariCiphers
tlsConfig.ForceSuites = true
}
if c.safariNoDHECiphers {
tlsConfig.CipherSuites = ztls.SafariNoDHECiphers
tlsConfig.ForceSuites = true
}
if c.extendedRandom {
tlsConfig.ExtendedRandom = true
}
if c.gatherSessionTicket {
tlsConfig.ForceSessionTicketExt = true
}
if c.offerExtendedMasterSecret {
tlsConfig.ExtendedMasterSecret = true
}
c.tlsConn = ztls.Client(c.conn, tlsConfig)
c.tlsConn.SetReadDeadline(c.readDeadline)
c.tlsConn.SetWriteDeadline(c.writeDeadline)
c.isTls = true
err := c.tlsConn.Handshake()
if tlsConfig.ForceSuites && err == ztls.ErrUnimplementedCipher {
err = nil
}
hl := c.tlsConn.GetHandshakeLog()
if !c.tlsVerbose {
hl.KeyMaterial = nil
hl.ClientHello = nil
hl.ClientFinished = nil
hl.ClientKeyExchange = nil
}
c.grabData.TLSHandshake = hl
return err
}
func makeHTTPGrabber(config *Config, grabData GrabData) func(string) error {
g := func(addr string) error {
var tlsConfig *ztls.Config
if config.TLS {
tlsConfig = new(ztls.Config)
tlsConfig.InsecureSkipVerify = true
tlsConfig.MinVersion = ztls.VersionSSL30
tlsConfig.MaxVersion = config.TLSVersion
tlsConfig.RootCAs = config.RootCAPool
tlsConfig.HeartbeatEnabled = true
tlsConfig.ClientDSAEnabled = true
if config.DHEOnly {
tlsConfig.CipherSuites = ztls.DHECiphers
}
if config.ExportsOnly {
tlsConfig.CipherSuites = ztls.RSA512ExportCiphers
}
if config.ExportsDHOnly {
tlsConfig.CipherSuites = ztls.DHEExportCiphers
}
if config.ChromeOnly {
tlsConfig.CipherSuites = ztls.ChromeCiphers
}
if config.ChromeNoDHE {
tlsConfig.CipherSuites = ztls.ChromeNoDHECiphers
}
if config.FirefoxOnly {
tlsConfig.CipherSuites = ztls.FirefoxCiphers
}
if config.FirefoxNoDHE {
tlsConfig.CipherSuites = ztls.FirefoxNoDHECiphers
}
if config.SafariOnly {
tlsConfig.CipherSuites = ztls.SafariCiphers
tlsConfig.ForceSuites = true
}
if config.SafariNoDHE {
tlsConfig.CipherSuites = ztls.SafariNoDHECiphers
tlsConfig.ForceSuites = true
}
if config.TLSExtendedRandom {
tlsConfig.ExtendedRandom = true
}
if config.GatherSessionTicket {
tlsConfig.ForceSessionTicketExt = true
}
if !config.NoSNI && addr != "" {
tlsConfig.ServerName = addr
}
}
transport := &http.Transport{
Proxy: nil, // TODO: implement proxying
Dial: makeNetDialer(config),
DisableKeepAlives: false,
DisableCompression: false,
MaxIdleConnsPerHost: -1,
TLSClientConfig: tlsConfig,
}
client := &http.Client{
CheckRedirect: func(req *http.Request, res *http.Response, via []*http.Request) error {
grabData.HTTP.RedirectResponseChain = append(grabData.HTTP.RedirectResponseChain, res)
if str, err := util.ReadString(res.Body, config.HTTP.MaxSize*1000); err != nil {
return err
} else {
res.BodyText = str
m := sha256.New()
m.Write([]byte(str))
res.BodySHA256 = m.Sum(nil)
}
res.Body.Close()
if len(via) > config.HTTP.MaxRedirects {
return errors.New(fmt.Sprintf("stopped after %d redirects", config.HTTP.MaxRedirects))
}
return nil
}, //Defaults to following up to 10 redirects
Jar: nil, // Don't send or receive cookies (otherwise use CookieJar)
Transport: transport,
}
var fullURL string
if config.TLS {
fullURL = "https://" + addr
} else {
fullURL = "http://" + addr
}
if resp, err := client.Get(fullURL); err != nil {
config.ErrorLog.Errorf("Could not connect to remote host %s: %s", addr, err.Error())
return err
} else {
grabData.HTTP.Response = resp
if str, err := util.ReadString(resp.Body, config.HTTP.MaxSize*1000); err != nil {
return err
} else {
grabData.HTTP.Response.BodyText = str
m := sha256.New()
m.Write([]byte(str))
grabData.HTTP.Response.BodySHA256 = m.Sum(nil)
}
resp.Body.Close()
}
return nil
}
return g
}