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webauthn_register.go
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/
webauthn_register.go
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package authservice
import (
"encoding/json"
"fmt"
"net/http"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/trace"
"github.com/mjm/pi-tools/pkg/spanerr"
)
func (s *Server) StartRegistration(w http.ResponseWriter, r *http.Request) {
ctx := r.Context()
span := trace.SpanFromContext(ctx)
var body struct {
Name string `json:"name"`
}
if err := json.NewDecoder(r.Body).Decode(&body); err != nil {
http.Error(w, spanerr.RecordError(ctx, err).Error(), http.StatusBadRequest)
return
}
span.SetAttributes(attribute.String("auth.username", body.Name))
token := r.Header.Get("X-Vault-Token")
if token == "" {
http.Error(w, "no X-Vault-Token header found", http.StatusBadRequest)
return
}
vault, err := s.Vault.Clone()
if err != nil {
http.Error(w, spanerr.RecordError(ctx, err).Error(), http.StatusInternalServerError)
return
}
vault.SetToken(token)
resp, err := vault.Logical().Read(fmt.Sprintf("auth/%s/users/%s/credentials/request", s.AuthPath, body.Name))
if err != nil {
http.Error(w, spanerr.RecordError(ctx, err).Error(), http.StatusInternalServerError)
return
}
sess, err := s.Store.Get(r, "vault-proxy")
if err != nil {
http.Error(w, spanerr.RecordError(ctx, err).Error(), http.StatusInternalServerError)
return
}
// Session should only last 5 more minutes
sess.Options.MaxAge = 300
sess.Values["registration_data"] = resp.Data["session_data"]
if err := sess.Save(r, w); err != nil {
http.Error(w, spanerr.RecordError(ctx, err).Error(), http.StatusInternalServerError)
return
}
w.Header().Set("Content-Type", "application/json")
fmt.Fprintf(w, "%s", resp.Data["creation_response"].(string))
}
func (s *Server) FinishRegistration(w http.ResponseWriter, r *http.Request) {
ctx := r.Context()
span := trace.SpanFromContext(ctx)
var body struct {
Name string `json:"name"`
Attestation json.RawMessage `json:"attestation"`
}
if err := json.NewDecoder(r.Body).Decode(&body); err != nil {
http.Error(w, spanerr.RecordError(ctx, err).Error(), http.StatusBadRequest)
return
}
span.SetAttributes(attribute.String("auth.username", body.Name))
token := r.Header.Get("X-Vault-Token")
if token == "" {
http.Error(w, "no X-Vault-Token header found", http.StatusBadRequest)
return
}
sess, err := s.Store.Get(r, "vault-proxy")
if err != nil {
http.Error(w, spanerr.RecordError(ctx, err).Error(), http.StatusBadRequest)
return
}
sessionDataRaw, ok := sess.Values["registration_data"]
if !ok {
http.Error(w, "no previous registration session saved", http.StatusForbidden)
return
}
sessionData := sessionDataRaw.(string)
// delete the session
sess.Options.MaxAge = -1
if err := sess.Save(r, w); err != nil {
http.Error(w, spanerr.RecordError(ctx, err).Error(), http.StatusBadRequest)
return
}
vault, err := s.Vault.Clone()
if err != nil {
http.Error(w, spanerr.RecordError(ctx, err).Error(), http.StatusInternalServerError)
return
}
vault.SetToken(token)
_, err = vault.Logical().Write(fmt.Sprintf("auth/%s/users/%s/credentials/create", s.AuthPath, body.Name), map[string]interface{}{
"session_data": sessionData,
"attestation_response": string(body.Attestation),
})
if err != nil {
http.Error(w, spanerr.RecordError(ctx, err).Error(), http.StatusForbidden)
return
}
w.WriteHeader(http.StatusNoContent)
}