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| `private` `static` `final` `String SYMBOLS =` `"0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"``;` `// 数字和26个字母组成`
`private` `static` `final` `Random RANDOM =` `new` `SecureRandom();`
`/**`
`* 获取长度为 6 的随机字母+数字`
`* @return 随机数字`
`*/`
`public` `static` `String getRandomNumber() {`
`char``[] nonceChars =` `new` `char``[``16``];` `//指定长度为6位/自己可以要求设置`
`for` `(``int` `index =` `0``; index < nonceChars.length; ++index) {`
`nonceChars[index] = SYMBOLS.charAt(RANDOM.nextInt(SYMBOLS.length()));`
`}`
`return` `new` `String(nonceChars);`
`}`
`import` `org.apache.commons.lang3.RandomStringUtils;`
`import` `org.apache.commons.lang3.StringUtils;`
`import` `org.slf4j.Logger;`
`import` `org.slf4j.LoggerFactory;`
`import` `org.springframework.util.Base64Utils;`
`import` `javax.crypto.Cipher;`
`import` `javax.crypto.spec.IvParameterSpec;`
`import` `javax.crypto.spec.SecretKeySpec;`
`/**`
`* AES加密工具类`
`*`
`* @author ACGkaka`
`* @since 2021-06-18 19:11:03`
`*/`
`public` `class` `AESUtil {`
`/**`
`* 日志相关`
`*/`
`private` `static` `final` `Logger LOGGER = LoggerFactory.getLogger(AESUtil.``class``);`
`/**`
`* 编码`
`*/`
`private` `static` `final` `String ENCODING =` `"UTF-8"``;`
`/**`
`* 算法定义`
`*/`
`private` `static` `final` `String AES_ALGORITHM =` `"AES"``;`
`/**`
`* 指定填充方式`
`*/`
`private` `static` `final` `String CIPHER_PADDING =` `"AES/ECB/PKCS5Padding"``;`
`private` `static` `final` `String CIPHER_CBC_PADDING =` `"AES/CBC/PKCS5Padding"``;`
`/**`
`* 偏移量(CBC中使用，增强加密算法强度)`
`*/`
`private` `static` `final` `String IV_SEED =` `"1234567812345678"``;`
`/**`
`* AES加密`
`* @param content 待加密内容`
`* @param aesKey 密码`
`* @return`
`*/`
`public` `static` `String encrypt(String content, String aesKey){`
`if``(StringUtils.isBlank(content)){`
`LOGGER.info(``"AES encrypt: the content is null!"``);`
`return` `null``;`
`}`
`//判断秘钥是否为16位`
`if``(StringUtils.isNotBlank(aesKey) && aesKey.length() ==` `16``){`
`try` `{`
`//对密码进行编码`
`byte``[] bytes = aesKey.getBytes(ENCODING);`
`//设置加密算法，生成秘钥`
`SecretKeySpec skeySpec =` `new` `SecretKeySpec(bytes, AES_ALGORITHM);`
`// "算法/模式/补码方式"`
`Cipher cipher = Cipher.getInstance(CIPHER_PADDING);`
`//选择加密`
`cipher.init(Cipher.ENCRYPT_MODE, skeySpec);`
`//根据待加密内容生成字节数组`
`byte``[] encrypted = cipher.doFinal(content.getBytes(ENCODING));`
`//返回base64字符串`
`return` `Base64Utils.encodeToString(encrypted);`
`}` `catch` `(Exception e) {`
`LOGGER.info(``"AES encrypt exception:"` `+ e.getMessage());`
`throw` `new` `RuntimeException(e);`
`}`
`}``else` `{`
`LOGGER.info(``"AES encrypt: the aesKey is null or error!"``);`
`return` `null``;`
`}`
`}`
`/**`
`* 解密`
`*`
`* @param content 待解密内容`
`* @param aesKey 密码`
`* @return`
`*/`
`public` `static` `String decrypt(String content, String aesKey){`
`if``(StringUtils.isBlank(content)){`
`LOGGER.info(``"AES decrypt: the content is null!"``);`
`return` `null``;`
`}`
`//判断秘钥是否为16位`
`if``(StringUtils.isNotBlank(aesKey) && aesKey.length() ==` `16``){`
`try` `{`
`//对密码进行编码`
`byte``[] bytes = aesKey.getBytes(ENCODING);`
`//设置解密算法，生成秘钥`
`SecretKeySpec skeySpec =` `new` `SecretKeySpec(bytes, AES_ALGORITHM);`
`// "算法/模式/补码方式"`
`Cipher cipher = Cipher.getInstance(CIPHER_PADDING);`
`//选择解密`
`cipher.init(Cipher.DECRYPT_MODE, skeySpec);`
`//先进行Base64解码`
`byte``[] decodeBase64 = Base64Utils.decodeFromString(content);`
`//根据待解密内容进行解密`
`byte``[] decrypted = cipher.doFinal(decodeBase64);`
`//将字节数组转成字符串`
`return` `new` `String(decrypted, ENCODING);`
`}` `catch` `(Exception e) {`
`LOGGER.info(``"AES decrypt exception:"` `+ e.getMessage());`
`throw` `new` `RuntimeException(e);`
`}`
`}``else` `{`
`LOGGER.info(``"AES decrypt: the aesKey is null or error!"``);`
`return` `null``;`
`}`
`}`
`/**`
`* AES_CBC加密`
`*`
`* @param content 待加密内容`
`* @param aesKey 密码`
`* @return`
`*/`
`public` `static` `String encryptCBC(String content, String aesKey){`
`if``(StringUtils.isBlank(content)){`
`LOGGER.info(``"AES_CBC encrypt: the content is null!"``);`
`return` `null``;`
`}`
`//判断秘钥是否为16位`
`if``(StringUtils.isNotBlank(aesKey) && aesKey.length() ==` `16``){`
`try` `{`
`//对密码进行编码`
`byte``[] bytes = aesKey.getBytes(ENCODING);`
`//设置加密算法，生成秘钥`
`SecretKeySpec skeySpec =` `new` `SecretKeySpec(bytes, AES_ALGORITHM);`
`// "算法/模式/补码方式"`
`Cipher cipher = Cipher.getInstance(CIPHER_CBC_PADDING);`
`//偏移`
`IvParameterSpec iv =` `new` `IvParameterSpec(IV_SEED.getBytes(ENCODING));`
`//选择加密`
`cipher.init(Cipher.ENCRYPT_MODE, skeySpec, iv);`
`//根据待加密内容生成字节数组`
`byte``[] encrypted = cipher.doFinal(content.getBytes(ENCODING));`
`//返回base64字符串`
`return` `Base64Utils.encodeToString(encrypted);`
`}` `catch` `(Exception e) {`
`LOGGER.info(``"AES_CBC encrypt exception:"` `+ e.getMessage());`
`throw` `new` `RuntimeException(e);`
`}`
`}``else` `{`
`LOGGER.info(``"AES_CBC encrypt: the aesKey is null or error!"``);`
`return` `null``;`
`}`
`}`
`/**`
`* AES_CBC解密`
`*`
`* @param content 待解密内容`
`* @param aesKey 密码`
`* @return`
`*/`
`public` `static` `String decryptCBC(String content, String aesKey){`
`if``(StringUtils.isBlank(content)){`
`LOGGER.info(``"AES_CBC decrypt: the content is null!"``);`
`return` `null``;`
`}`
`//判断秘钥是否为16位`
`if``(StringUtils.isNotBlank(aesKey) && aesKey.length() ==` `16``){`
`try` `{`
`//对密码进行编码`
`byte``[] bytes = aesKey.getBytes(ENCODING);`
`//设置解密算法，生成秘钥`
`SecretKeySpec skeySpec =` `new` `SecretKeySpec(bytes, AES_ALGORITHM);`
`//偏移`
`IvParameterSpec iv =` `new` `IvParameterSpec(IV_SEED.getBytes(ENCODING));`
`// "算法/模式/补码方式"`
`Cipher cipher = Cipher.getInstance(CIPHER_CBC_PADDING);`
`//选择解密`
`cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv);`
`//先进行Base64解码`
`byte``[] decodeBase64 = Base64Utils.decodeFromString(content);`
`//根据待解密内容进行解密`
`byte``[] decrypted = cipher.doFinal(decodeBase64);`
`//将字节数组转成字符串`
`return` `new` `String(decrypted, ENCODING);`
`}` `catch` `(Exception e) {`
`LOGGER.info(``"AES_CBC decrypt exception:"` `+ e.getMessage());`
`throw` `new` `RuntimeException(e);`
`}`
`}``else` `{`
`LOGGER.info(``"AES_CBC decrypt: the aesKey is null or error!"``);`
`return` `null``;`
`}`
`}`
`public` `static` `void` `main(String[] args) {`
`// AES支持三种长度的密钥：128位、192位、256位。`
`// 代码中这种就是128位的加密密钥，16字节 * 8位/字节 = 128位。`
`String random = RandomStringUtils.random(``16``,` `"abcdefghijklmnopqrstuvwxyz1234567890"``);`
`System.out.println(``"随机key:"` `+ random);`
`System.out.println();`
`System.out.println(``"---------加密---------"``);`
`String aesResult = encrypt(``"测试AES加密12"``, random);`
`System.out.println(``"aes加密结果:"` `+ aesResult);`
`System.out.println();`
`System.out.println(``"---------解密---------"``);`
`String decrypt = decrypt(aesResult, random);`
`System.out.println(``"aes解密结果:"` `+ decrypt);`
`System.out.println();`
`System.out.println(``"--------AES_CBC加密解密---------"``);`
`String cbcResult = encryptCBC(``"测试AES加密12456"``, random);`
`System.out.println(``"aes_cbc加密结果:"` `+ cbcResult);`
`System.out.println();`
`System.out.println(``"---------解密CBC---------"``);`
`String cbcDecrypt = decryptCBC(cbcResult, random);`
`System.out.println(``"aes解密结果:"` `+ cbcDecrypt);`
`System.out.println();`
`}`
`}`
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