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common/moduleauth: Modul-Token-Verifier (Ed25519, JWKS) und Bearer-Middleware
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
2026-10-27 23:40:30 +01:00

67 lines
2.2 KiB
Go

package moduleauth
import (
"context"
"crypto/ed25519"
"crypto/rand"
"encoding/base64"
"encoding/json"
"time"
)
// TestIssuer signiert Modul-Tokens mit einem einmalig erzeugten Testschluessel
// (nur fuer Tests anderer Pakete gedacht, siehe INT-18: mailapi/mailrulesapi
// koennen ErrInvalidToken/echte Signaturpruefung nicht ohne einen Aussteller
// testen, ein echter Kontodienst ist in Unit-Tests nicht verfuegbar).
type TestIssuer struct {
kid string
pub ed25519.PublicKey
prv ed25519.PrivateKey
}
// NewTestVerifierAndIssuer erzeugt ein Ed25519-Testschluesselpaar, einen
// Verifier, der ausschliesslich diesen Schluessel kennt, und den passenden
// Aussteller. audience/issuer leer = keine Bindung geprueft (Verhalten wie
// im Uebergang vor API-18/API-15 verdrahtet sind).
func NewTestVerifierAndIssuer() (*Verifier, *TestIssuer) {
pub, prv, err := ed25519.GenerateKey(rand.Reader)
if err != nil {
panic(err)
}
iss := &TestIssuer{kid: "test-key", pub: pub, prv: prv}
v := NewVerifier(time.Minute, "", func(context.Context) (map[string]ed25519.PublicKey, error) {
return map[string]ed25519.PublicKey{iss.kid: iss.pub}, nil
})
return v, iss
}
func b64json(v any) string {
raw, _ := json.Marshal(v)
return base64.RawURLEncoding.EncodeToString(raw)
}
// Token stellt ein gueltiges Modul-Token fuer subject/tenant/role aus,
// optional mit audience/issuer (leer = Claim wird weggelassen).
func (t *TestIssuer) Token(subject, tenant, role, audience, issuer string) string {
return t.TokenExpiringAt(subject, tenant, role, audience, issuer, time.Now().Add(time.Hour))
}
// TokenExpiringAt wie Token, aber mit fest vorgegebenem Ablaufzeitpunkt
// (fuer Tests, die ein bereits abgelaufenes Token brauchen).
func (t *TestIssuer) TokenExpiringAt(subject, tenant, role, audience, issuer string, exp time.Time) string {
now := time.Now()
claims := map[string]any{
"sub": subject, "tenant": tenant, "role": role,
"iat": now.Unix(), "exp": exp.Unix(),
}
if audience != "" {
claims["aud"] = audience
}
if issuer != "" {
claims["iss"] = issuer
}
h := b64json(map[string]string{"alg": "EdDSA", "kid": t.kid, "typ": "JWT"})
signing := h + "." + b64json(claims)
return signing + "." + base64.RawURLEncoding.EncodeToString(ed25519.Sign(t.prv, []byte(signing)))
}