91 lines
1.8 KiB
Go
91 lines
1.8 KiB
Go
// +build ignore
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package main
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import (
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"crypto/sha512"
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"crypto/tls"
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"crypto/x509"
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"crypto/x509/pkix"
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"fmt"
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"log"
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"time"
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"git.sr.ht/~adnano/go-gemini"
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)
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type User struct {
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Name string
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}
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var (
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// Map of certificate hashes to users
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users = map[string]*User{}
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)
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func main() {
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var mux gemini.ServeMux
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mux.HandleFunc("/", profile)
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mux.HandleFunc("/username", changeUsername)
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var server gemini.Server
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if err := server.Certificates.Load("/var/lib/gemini/certs"); err != nil {
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log.Fatal(err)
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}
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server.CreateCertificate = func(hostname string) (tls.Certificate, error) {
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return gemini.CreateCertificate(gemini.CertificateOptions{
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Subject: pkix.Name{
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CommonName: hostname,
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},
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DNSNames: []string{hostname},
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Duration: time.Hour,
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})
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}
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server.Register("localhost", &mux)
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if err := server.ListenAndServe(); err != nil {
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log.Fatal(err)
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}
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}
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func fingerprint(cert *x509.Certificate) string {
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b := sha512.Sum512(cert.Raw)
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return string(b[:])
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}
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func profile(w *gemini.ResponseWriter, r *gemini.Request) {
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if r.Certificate == nil {
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w.WriteStatus(gemini.StatusCertificateRequired)
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return
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}
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fingerprint := fingerprint(r.Certificate.Leaf)
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user, ok := users[fingerprint]
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if !ok {
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user = &User{}
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users[fingerprint] = user
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}
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fmt.Fprintln(w, "Username:", user.Name)
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fmt.Fprintln(w, "=> /username Change username")
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}
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func changeUsername(w *gemini.ResponseWriter, r *gemini.Request) {
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if r.Certificate == nil {
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w.WriteStatus(gemini.StatusCertificateRequired)
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return
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}
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username, ok := gemini.Input(r)
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if !ok {
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w.WriteHeader(gemini.StatusInput, "Username")
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return
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}
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fingerprint := fingerprint(r.Certificate.Leaf)
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user, ok := users[fingerprint]
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if !ok {
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user = &User{}
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users[fingerprint] = user
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}
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user.Name = username
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w.WriteHeader(gemini.StatusRedirect, "/")
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}
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