98 lines
2.0 KiB
Go
98 lines
2.0 KiB
Go
package main
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import (
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"encoding/hex"
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"encoding/json"
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"flag"
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"net/http"
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"strings"
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"time"
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"github.com/google/uuid"
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"github.com/o1egl/paseto/v2"
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"golang.org/x/crypto/ed25519"
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"within.website/ln"
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)
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var (
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// Paseto
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pasetoPublicKey = flag.String("paseto-public-key", "", "Paseto public key (see tools/paseto-key-gen.go)")
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pasetoPrivateKey = flag.String("paseto-private-key", "", "Paseto private key")
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)
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type PasetoMiddleware struct {
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next http.Handler
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pubKey ed25519.PublicKey
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privKey ed25519.PrivateKey
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v2 paseto.V2
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}
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func MakeMiddleware(pub, priv string, next http.Handler) (*PasetoMiddleware, error) {
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var result PasetoMiddleware
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result.next = next
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publicKey, err := hex.DecodeString(pub)
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if err != nil {
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return nil, err
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}
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result.pubKey = ed25519.PublicKey(publicKey)
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privateKey, err := hex.DecodeString(priv)
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if err != nil {
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return nil, err
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}
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result.privKey = ed25519.PrivateKey(privateKey)
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return &result, nil
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}
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func (pm PasetoMiddleware) CreateToken(data [][2]string, expiration time.Time) (string, error) {
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claims := paseto.JSONToken{
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Expiration: expiration,
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Jti: uuid.New().String(),
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Subject: "Within",
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IssuedAt: time.Now(),
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}
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for _, datum := range data {
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claims.Set(datum[0], datum[1])
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}
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tok, err := pm.v2.Sign(pm.privKey, claims, nil)
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if err != nil {
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return "", err
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}
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return tok, nil
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}
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func (pm PasetoMiddleware) ServeHTTP(w http.ResponseWriter, r *http.Request) {
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tok := r.Header.Get("Authorization")
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var newJsonToken paseto.JSONToken
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var newFooter string
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var err error
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if r.URL.EscapedPath() == "/.within/botinfo" {
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goto ok
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}
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if strings.HasPrefix(r.URL.EscapedPath(), "/webhooks/") {
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goto ok
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}
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err = pm.v2.Verify(tok, pm.pubKey, &newJsonToken, &newFooter)
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if err != nil {
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ln.Error(r.Context(), err)
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http.Error(w, "Not allowed", http.StatusForbidden)
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return
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}
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if r.URL.EscapedPath() == "/.within/tokeninfo" {
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json.NewEncoder(w).Encode(newJsonToken)
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return
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}
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ok:
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pm.next.ServeHTTP(w, r)
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}
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