basic common app packages

jwt/jwt.go

@@ -0,0 +1,48 @@
+// Copyright 2024 Patial Tech (Ankit Patial).
+// All rights reserved.
+
+package jwt
+
+import (
+	"crypto/ed25519"
+	"errors"
+	"log"
+	"maps"
+	"time"
+
+	"github.com/golang-jwt/jwt/v5"
+)
+
+func Sign(key ed25519.PrivateKey, claims map[string]any, issuer string, d time.Duration) (string, error) {
+	cl := jwt.MapClaims{
+		"iss": issuer,
+		"iat": jwt.NewNumericDate(time.Now().UTC()),
+		"exp": jwt.NewNumericDate(time.Now().Add(d)),
+	}
+	maps.Copy(cl, claims)
+
+	t := jwt.NewWithClaims(jwt.SigningMethodEdDSA, cl)
+	return t.SignedString(key)
+}
+
+func Parse(key ed25519.PrivateKey, tokenString string, issuer string) (jwt.MapClaims, error) {
+	token, err := jwt.Parse(
+		tokenString,
+		func(token *jwt.Token) (any, error) {
+			return key.Public(), nil
+		},
+		jwt.WithValidMethods([]string{jwt.SigningMethodEdDSA.Alg()}),
+		jwt.WithIssuer(issuer),
+		jwt.WithIssuedAt(),
+		jwt.WithExpirationRequired(),
+	)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	if claims, ok := token.Claims.(jwt.MapClaims); ok {
+		return claims, nil
+	} else {
+		return nil, errors.New("no claims found")
+	}
+}