update for rca

CertificateAutorityServer/Controllers/Rca/RcaController.cs

@@ -25,7 +25,7 @@ namespace CertificateAutorityServer.Controllers.Rca
         public async Task<IActionResult> ReqCsrSign(SignCsrReq signCsrReq)
         {
             var result = await certificateService.SignCsrByRca(signCsrReq);
-            return Ok(result);
+            return string.IsNullOrEmpty(result) ? BadRequest() : Ok(result);
         }
 
         [HttpPost("check")]

CertificateAutorityServer/Model/Rest/SignCsrReq.cs

@@ -3,8 +3,8 @@
     public class SignCsrReq
     {
         public required string Csr { get; set; }
-        public required string Rca { get; set; }
-        public required string RcaKey { get; set; }
+        public string Rca { get; set; }
+        public string RcaKey { get; set; }
         public bool IsCa { get; set; } = false;
         //public required string Name { get; set; }
         //public IFormFile? CsrFile { get; set; }