Initial commit.

authentication.go

@@ -0,0 +1,37 @@
+package token
+
+import (
+	"strings"
+
+	"github.com/golang-jwt/jwt/v4"
+)
+
+const (
+	bearerPrefix      = "Bearer "
+	bearerPrefixLower = "bearer "
+)
+
+func GetClaims(authorization string, key string, claims jwt.Claims) error {
+	bearer := getBearer(authorization)
+
+	return ParseClaims(bearer, key, claims)
+}
+
+func getBearer(authorization string) string {
+	return strings.TrimPrefix(strings.TrimPrefix(
+		authorization,
+		bearerPrefix),
+		bearerPrefixLower)
+}
+
+func ParseClaims(token string, key string, claims jwt.Claims) error {
+	_, err := jwt.ParseWithClaims(token, claims, func(t *jwt.Token) (interface{}, error) {
+		return []byte(key), nil
+	})
+	return err
+}
+
+func CreateToken(key string, claims jwt.Claims) (string, error) {
+	token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
+	return token.SignedString([]byte(key))
+}

go.mod

@@ -0,0 +1,5 @@
+module github.com/cardboardrobots/token
+
+go 1.23.0
+
+require github.com/golang-jwt/jwt/v4 v4.5.0

go.sum

@@ -0,0 +1,2 @@
+github.com/golang-jwt/jwt/v4 v4.5.0 h1:7cYmW1XlMY7h7ii7UhUyChSgS5wUJEnm9uZVTGqOWzg=
+github.com/golang-jwt/jwt/v4 v4.5.0/go.mod h1:m21LjoU+eqJr34lmDMbreY2eSTRJ1cv77w39/MY0Ch0=