ＡＥＳ加解密及ＲＳＡ加解密

最新推荐文章于 2025-11-12 12:23:22 发布

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最新推荐文章于 2025-11-12 12:23:22 发布 · 395 阅读

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CC 4.0 BY-SA版权

文章标签：

#android #android studio #git

本文探讨了在Android开发中如何实现AES和RSA两种加密算法的加解密操作，涵盖了这两种加密方式的基本原理及其在实际应用中的重要性。通过对AES的块加密和密钥管理，以及RSA的非对称加密特性的讲解，为开发者提供了安全存储和传输数据的解决方案。

ＡＥＳ加解密及ＲＳＡ加解密

/**
 * Time:2020/10/28
 * Author:xin.chen
 * Description:
 **/
public class AESCipher {

    private static final String IV_STRING = "A-16-Byte-String";
    private static final String charset = "UTF-8";
    public static final String AES_SECRECT_KEY = "wukuangxintuoabc";

    @RequiresApi(api = Build.VERSION_CODES.O)
    public static String aesEncryptString(String content, String key) throws InvalidKeyException, NoSuchAlgorithmException, NoSuchPaddingException, InvalidAlgorithmParameterException, IllegalBlockSizeException, BadPaddingException, UnsupportedEncodingException {
        byte[] contentBytes = content.getBytes(charset);
        byte[] keyBytes = key.getBytes(charset);
        byte[] encryptedBytes = aesEncryptBytes(contentBytes, keyBytes);
        Encoder encoder = Base64.getEncoder();
        return encoder.encodeToString(encryptedBytes);
    }

    @RequiresApi(api = Build.VERSION_CODES.O)
    public static String aesDecryptString(String content, String key) throws InvalidKeyException, NoSuchAlgorithmException, NoSuchPaddingException, InvalidAlgorithmParameterException, IllegalBlockSizeException, BadPaddingException, UnsupportedEncodingException {
        Decoder decoder = Base64.getDecoder();
        byte[] encryptedBytes = decoder.decode(content);
        byte[] keyBytes = key.getBytes(charset);
        byte[] decryptedBytes = aesDecryptBytes(encryptedBytes, keyBytes);
        return new String(decryptedBytes, charset);
    }

    public static byte[] aesEncryptBytes(byte[] contentBytes, byte[] keyBytes) throws NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, InvalidAlgorithmParameterException, IllegalBlockSizeException, BadPaddingException, UnsupportedEncodingException {
        return cipherOperation(contentBytes, keyBytes, Cipher.ENCRYPT_MODE);
    }

    public static byte[] aesDecryptBytes(byte[] contentBytes, byte[] keyBytes) throws NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, InvalidAlgorithmParameterException, IllegalBlockSizeException, BadPaddingException, UnsupportedEncodingException {
        return cipherOperation(contentBytes, keyBytes, Cipher.DECRYPT_MODE);
    }

    private static byte[] cipherOperation(byte[] contentBytes, byte[] keyBytes, int mode) throws UnsupportedEncodingException, NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, InvalidAlgorithmParameterException, IllegalBlockSizeException, BadPaddingException {
        SecretKeySpec secretKey = new SecretKeySpec(keyBytes, "AES");

        byte[] initParam = IV_STRING.getBytes(charset);
        IvParameterSpec ivParameterSpec = new IvParameterSpec(initParam);

        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
        cipher.init(mode, secretKey, ivParameterSpec);

        return cipher.doFinal(contentBytes);
    }

}