微信获取授权用户手机号

微信获取授权用户手机号

用户登录获取用户的sessionKey

这一步主要是用JSCODE通过微信接口获得

解密

public String decodePhone(String encryptedData, String iv, String sessionKey){
    try {
      byte[] sessionKeyBytes = Base64.decode(sessionKey);
      byte[] encryptedDataBytes = Base64.decode(encryptedData);
      byte[] ivBytes =  Base64.decode(iv);

      Security.addProvider(new BouncyCastleProvider());


      SecretKeySpec skeySpec = new SecretKeySpec(sessionKeyBytes, "AES");
      AlgorithmParameters parameters = AlgorithmParameters.getInstance("AES");
      parameters.init(new IvParameterSpec(ivBytes, 0, INIT_VECTOR_LENGTH));
      Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5PADDING");
      cipher.init(Cipher.DECRYPT_MODE, skeySpec, new IvParameterSpec(ivBytes, 0, INIT_VECTOR_LENGTH));

      byte[] decrypted = cipher.doFinal(encryptedDataBytes);
      if (null != decrypted && decrypted.length > 0) {
        String result = new String(decrypted, "UTF-8");
        return  result;
      }
    } catch (Exception ex) {
      ex.printStackTrace();
    }


    return null;
  }