feat: optimize code

src/crypto_rsa.rs

@@ -35,7 +35,7 @@ fn pem_to_der_bytes(pem: &str) -> XResult<Vec<u8>> {
     }
     pem = pem.chars().filter(|c| *c != '\n' && *c != '\r').clone().collect::<String>();
 
-    Ok(opt_result!(decode_base64(&pem), "Decode PEM or DER failed: {}"))
+    Ok(opt_result!(decode_base64(&pem), "Decode PEM failed: {}"))
 }
 
 #[test]