Android Rsa解密出现乱码问题

Rsa 私钥解密

通常java 解密方法如下

    /**
     * RSA私钥解密
     *
     * @param str        加密字符串
     * @param privateKey 私钥
     * @return 明文
     * @throws Exception 解密过程中的异常信息
     */
    public static String decrypt(String str, String privateKey) {
        //64位解码加密后的字符串
        String outStr = null;
        try {

//
            byte[] inputByte = Base64.getDecoder().decode(str);
            //base64编码的私钥

            byte[] decoded = Base64.getDecoder().decode(privateKey);
            RSAPrivateKey priKey = (RSAPrivateKey) KeyFactory.getInstance("RSA").generatePrivate(new PKCS8EncodedKeySpec(decoded));
            //RSA解密
            Cipher cipher = Cipher.getInstance("RSA");
            cipher.init(Cipher.DECRYPT_MODE, priKey);
            outStr = new String(cipher.doFinal(inputByte), StandardCharsets.UTF_8);

          

        } catch (Exception e) {
            e.printStackTrace();
            Log.e(TAG, "decypt exception is" + e.getMessage());
        }
        return outStr;
    }

如果Android 用这种方式创建Cipher 的话 会出现乱码
解决：

  Cipher cipher = Cipher.getInstance("RSA"); 

替换成

Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding");

完美解决！！