區分獲取SM2、RSA類型證書的密鑰長度、祕鑰算法和簽名算法值

 最近不知道在忙什麼，也不知道寫點什麼，直接丟個工具類吧~~~

  /**
   * 獲取X509證書的祕鑰算法和祕鑰長度
   *
   * @param certificate
   * @return
   */
  public static CertInfo getKeyAlgAndLength(X509Certificate certificate) throws Exception {

      CertInfo certInfo = new CertInfo();
      //可以得到EC RSA
      String keyAlgName = certificate.getPublicKey().getAlgorithm();
      //不區分大小寫比較
      if ("EC".equalsIgnoreCase(keyAlgName)) {
          keyAlgName = "SM2";
          certInfo.setKeyLength(256);
          certInfo.setKeyAlg(keyAlgName);
          return certInfo;
      } else if ("RSA".equalsIgnoreCase(keyAlgName)) {
          RSAPublicKey rsaPublicKey = (RSAPublicKey) certificate.getPublicKey();
          Integer length = rsaPublicKey.getModulus().bitLength();
          certInfo.setKeyAlg(keyAlgName);
          certInfo.setKeyLength(length);
      } else {
          throw new Exception();
      }
      return certInfo;
  }

/**
 * 接收證書祕鑰算法和祕鑰長度
 *
 * @author wly
 */
public class CertInfo {
    private String keyAlg;
    private int keyLength;

    public CertInfo() {
    }

    //get、set方法
}

 

順便區分一下簽名算法和祕鑰算法值， 僅針對自己平時SM2和RSA的證書：

//獲取祕鑰算法 可以得到 EC RSA
String keyAlgName = cert.getPublicKey().getAlgorithm();

//獲取證書籤名算法 值爲 SM2WithSM3、SHA1WithRSA、SHA256WithRSA等
String signAlgName = cert.getSigAlgName()

 

預祝大家國慶節Happy！本人已經打算回家找媽媽啦~