mirror of
https://github.com/XTLS/RealiTLScanner.git
synced 2026-09-25 07:38:01 +03:00
59 lines
1.5 KiB
Go
59 lines
1.5 KiB
Go
package main
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import (
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"crypto/tls"
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"io"
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"log/slog"
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"net"
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"strconv"
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"strings"
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"time"
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)
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var TLSDictionary = map[uint16]string{
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0x0301: "1.0",
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0x0302: "1.1",
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0x0303: "1.2",
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0x0304: "1.3",
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}
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func ScanTLS(ip net.IP, out io.Writer) {
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hostPort := net.JoinHostPort(ip.String(), strconv.Itoa(port))
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conn, err := net.DialTimeout("tcp", hostPort, time.Duration(timeout)*time.Second)
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if err != nil {
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slog.Debug("Cannot dial", "target", hostPort)
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return
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}
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defer conn.Close()
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err = conn.SetDeadline(time.Now().Add(time.Duration(timeout) * time.Second))
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if err != nil {
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slog.Error("Error setting deadline", "err", err)
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return
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}
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c := tls.Client(conn, &tls.Config{
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InsecureSkipVerify: true,
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NextProtos: []string{"h2", "http/1.1"},
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})
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err = c.Handshake()
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if err != nil {
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slog.Debug("TLS handshake failed", "target", hostPort)
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return
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}
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state := c.ConnectionState()
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alpn := state.NegotiatedProtocol
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domain := state.PeerCertificates[0].Subject.CommonName
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issuers := strings.Join(state.PeerCertificates[0].Issuer.Organization, " | ")
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log := slog.Info
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feasible := true
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if state.Version != 0x0304 || alpn != "h2" || len(domain) == 0 || len(issuers) == 0 {
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// not feasible
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log = slog.Debug
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feasible = false
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} else {
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_, _ = io.WriteString(out, strings.Join([]string{ip.String(), domain, "\"" + issuers + "\""}, ",")+"\n")
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}
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log("Connected to target", "feasible", feasible, "host", ip.String(),
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"tls", TLSDictionary[state.Version],
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"alpn", alpn, "domain", domain, "issuer", issuers)
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}
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