feat(qs2) add qs2 framework

src/cryptoutil/cryptoutil_interface.go

@@ -0,0 +1,6 @@
+package cryptoutil
+
+type ITokenEncDec interface {
+	FromToken(token string, kvs map[string]string) (map[string]string, error)
+	ToToken(kvs map[string]string) (string, error)
+}

src/cryptoutil/jwt/jwt.go

@@ -0,0 +1,51 @@
+package jwt
+
+import (
+	"errors"
+
+	jwtpkg "github.com/robbert229/jwt"
+)
+
+type JWTEncDec struct {
+	alg jwtpkg.Algorithm
+}
+
+func NewJWTEncDec(secret string) *JWTEncDec {
+	return &JWTEncDec{
+		alg: jwtpkg.HmacSha256(secret),
+	}
+}
+
+func (ed *JWTEncDec) FromToken(token string, kvs map[string]string) (map[string]string, error) {
+	claims, err := ed.alg.Decode(token)
+	if err != nil {
+		return nil, err
+	}
+
+	for key := range kvs {
+		iVal, err := claims.Get(key)
+		if err != nil {
+			return nil, err
+		}
+		strVal, ok := iVal.(string)
+		if !ok {
+			return nil, errors.New("incorrect JWT claim")
+		}
+
+		kvs[key] = strVal
+	}
+	return kvs, nil
+}
+
+func (ed *JWTEncDec) ToToken(kvs map[string]string) (string, error) {
+	claims := jwtpkg.NewClaim()
+	for key, val := range kvs {
+		claims.Set(key, val)
+	}
+
+	token, err := ed.alg.Encode(claims)
+	if err != nil {
+		return "", err
+	}
+	return token, nil
+}