DB Caching mechanism working and final service structure

services/tokenTools/tokenTools.go

@@ -0,0 +1,62 @@
+package tokenTools
+
+import (
+	"crypto/rand"
+	"fmt"
+
+	jwt "github.com/dgrijalva/jwt-go"
+)
+
+var hmacSecret []byte
+
+// GenerateSecret generate the secret to verify JWTs
+func GenerateSecret() []byte {
+	b := make([]byte, 32)
+	rand.Read(b)
+	return b
+}
+
+// InitJWTService generate the secret to verify JWTs and store it in memory
+func InitTokenToolsService() {
+	hmacSecret = GenerateSecret()
+	fmt.Println("InitJWTService", hmacSecret)
+	// TODO: This needs to be replaced with reading rsa keys, there needs to be a automatic generation of these if they do not exist
+
+}
+
+// Validate a jwt tokenstring
+func Validate(Token string) (bool, jwt.Token) {
+	token, err := jwt.Parse(Token, func(token *jwt.Token) (interface{}, error) {
+		if _, ok := token.Method.(*jwt.SigningMethodHMAC); !ok {
+			return nil, fmt.Errorf("Unexpected signing method: %v", token.Header["alg"])
+		}
+
+		return hmacSecret, nil
+	})
+
+	if err == nil && token.Valid {
+
+		fmt.Println("Token is valid")
+		return true, *token
+	}
+
+	fmt.Println("Token Validation failed")
+	return false, *token
+}
+
+// CreateToken create a new jwt token with the provided claims
+func CreateToken(Claims jwt.MapClaims) string {
+
+	// Create a new token object, specifying signing method and the claims
+	// you would like it to contain.
+
+	token := jwt.NewWithClaims(jwt.SigningMethodHS256, Claims)
+
+	// Sign and get the complete encoded token as a string using the secret
+	tokenString, err := token.SignedString(hmacSecret)
+	if err != nil {
+		fmt.Println(err.Error())
+	}
+
+	return tokenString
+}