// generateRandomKey creates a random key with the given strength.
func generateRandomKey(strength int) []byte {
k := make([]byte, strength)
if n, err := io.ReadFull(rand.Reader, k); n != strength || err != nil {
return utils.RandomCreateBytes(strength)
}
return k
}
// XSRFToken creates a xsrf token string and returns.
func (ctx *Context) XSRFToken(key string, expire int64) string {
if ctx._xsrfToken == "" {
token, ok := ctx.GetSecureCookie(key, "_xsrf")
if !ok {
token = string(utils.RandomCreateBytes(32))
ctx.SetSecureCookie(key, "_xsrf", token, expire)
}
ctx._xsrfToken = token
}
return ctx._xsrfToken
}