forked from
tangled.org/core
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knotserver: implement signature verification
+51
-21
+12
knotserver/handler.go
+12
knotserver/handler.go
···
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db: db,
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}
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// r.Group(func(r chi.Router) {
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// r.Route("/settings", func(r chi.Router) {
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// r.Get("/keys", h.Keys)
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// r.Put("/keys", h.Keys)
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// })
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// })
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r.Get("/", h.Index)
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r.Route("/{did}", func(r chi.Router) {
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// Repo routes
···
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r.Route("/repo", func(r chi.Router) {
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r.Put("/new", h.NewRepo)
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})
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r.Route("/internal", func(r chi.Router) {
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r.Use(h.VerifySignature)
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r.Get("/health", h.Health)
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})
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return r, nil
+35
knotserver/middleware.go
+35
knotserver/middleware.go
···
1
+
package knotserver
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+
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import (
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"crypto/hmac"
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"crypto/sha256"
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"encoding/hex"
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"net/http"
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)
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func (h *Handle) VerifySignature(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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signature := r.Header.Get("X-Signature")
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if signature == "" || !h.verifyHMAC(signature, r) {
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writeError(w, "signature verification failed", http.StatusForbidden)
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return
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}
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next.ServeHTTP(w, r)
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})
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}
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func (h *Handle) verifyHMAC(signature string, r *http.Request) bool {
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secret := h.c.Secret
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message := r.Method + r.URL.Path + r.URL.RawQuery
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mac := hmac.New(sha256.New, []byte(secret))
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mac.Write([]byte(message))
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expectedMAC := mac.Sum(nil)
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signatureBytes, err := hex.DecodeString(signature)
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if err != nil {
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return false
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}
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return hmac.Equal(signatureBytes, expectedMAC)
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}
+4
-21
knotserver/routes.go
+4
-21
knotserver/routes.go
···
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// return
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// }
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-
// // store in pds too
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// resp, err := comatproto.RepoPutRecord(r.Context(), client, &comatproto.RepoPutRecord_Input{
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// Collection: "sh.bild.publicKey",
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// Repo: did,
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// Rkey: uuid.New().String(),
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// Record: &lexutil.LexiconTypeDecoder{Val: &shbild.PublicKey{
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// Created: time.Now().String(),
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// Key: key,
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// Name: name,
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// }},
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// })
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-
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// // invalid record
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// if err != nil {
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// h.WriteOOBNotice(w, "keys", "Invalid inputs. Check your formatting and try again.")
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// log.Printf("failed to create record: %s", err)
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// return
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// }
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// log.Println("created atproto record: ", resp.Uri)
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-
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// h.WriteOOBNotice(w, "keys", "Key added!")
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// return
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// }
···
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// return
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// }
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// }
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func (h *Handle) Health(w http.ResponseWriter, r *http.Request) {
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w.Write([]byte("ok"))
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}