Implement test server

server/key_directory.go

@@ -0,0 +1,40 @@
+package server
+
+import (
+	"context"
+	"crypto"
+	"crypto/ed25519"
+	"fmt"
+
+	"github.com/common-fate/httpsig/alg_ed25519"
+	"github.com/common-fate/httpsig/verifier"
+)
+
+type KeyEntry struct {
+	alg       string
+	publicKey crypto.PublicKey
+	userId    string
+}
+
+type InMemoryDirectory struct {
+	records map[string]KeyEntry
+}
+
+func (dir *InMemoryDirectory) GetKey(ctx context.Context, keyId string, _ string) (verifier.Algorithm, error) {
+	entry := dir.records[keyId]
+
+	var alg verifier.Algorithm
+	var err error
+
+	switch entry.alg {
+	case "ed25519":
+		alg = alg_ed25519.Ed25519{
+			PublicKey: entry.publicKey.(ed25519.PublicKey),
+			Attrs:     entry.userId,
+		}
+	default:
+		err = fmt.Errorf("unknown algoritm: %s", entry.alg)
+	}
+
+	return alg, err
+}

server/server.go

@@ -0,0 +1,56 @@
+package server
+
+import (
+	"context"
+	"crypto"
+	"fmt"
+	"net/http"
+
+	"github.com/common-fate/httpsig"
+	"github.com/common-fate/httpsig/inmemory"
+)
+
+func Start(publicKey crypto.PublicKey) error {
+	keyDir := InMemoryDirectory{
+		records: map[string]KeyEntry{},
+	}
+
+	keyId := "test-id"
+
+	keyDir.records[keyId] = KeyEntry{
+		alg:       "ed25519",
+		publicKey: publicKey,
+		userId:    "test_user",
+	}
+
+	mux := http.NewServeMux()
+
+	verifier := httpsig.Middleware(httpsig.MiddlewareOpts{
+		NonceStorage: inmemory.NewNonceStorage(),
+		KeyDirectory: &keyDir,
+		Tag:          "test-tag",
+		Scheme:       "http",
+		Authority:    "localhost:8080",
+
+		OnValidationError: func(ctx context.Context, err error) {
+			fmt.Printf("validation error: %s\n", err)
+		},
+
+		OnDeriveSigningString: func(ctx context.Context, stringToSign string) {
+			fmt.Printf("string to sign:\n%s\n", stringToSign)
+		},
+	})
+
+	mux.Handle("/", verifier(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		fmt.Printf("Responding...\n")
+		attr := httpsig.AttributesFromContext(r.Context()).(string)
+		fmt.Printf("User is %s\n", attr)
+		msg := fmt.Sprintf("hello, %s!", attr)
+		w.Write([]byte(msg))
+		fmt.Printf("Responded...\n")
+	})))
+
+	err := http.ListenAndServe("localhost:8080", mux)
+
+	return err
+}