Add code to translate errInvalidEncryptionParameters to APIErrcode (#6625)

Fixes #6623

cmd/api-errors.go

@@ -1441,6 +1441,8 @@ func toAPIErrorCode(err error) (apiErr APIErrorCode) {
 	case auth.ErrInvalidSecretKeyLength:
 		apiErr = ErrAdminInvalidSecretKey
 	// SSE errors
+	case errInvalidEncryptionParameters:
+		apiErr = ErrInvalidEncryptionParameters
 	case crypto.ErrInvalidEncryptionMethod:
 		apiErr = ErrInvalidEncryptionMethod
 	case errInsecureSSERequest:

cmd/object-handlers.go

@@ -570,7 +570,7 @@ func (api objectAPIHandlers) HeadObjectHandler(w http.ResponseWriter, r *http.Re
 
 	// Set standard object headers.
 	if hErr := setObjectHeaders(w, objInfo, rs); hErr != nil {
-		writeErrorResponse(w, toAPIErrorCode(hErr), r.URL)
+		writeErrorResponseHeadersOnly(w, toAPIErrorCode(hErr))
 		return
 	}