首页 > 其他分享> 文章详细

开发中常用的 4 种加密方法

2021-07-06 10:52:22 阅读：120 来源： 互联网

标签：常用加密 String 开发 static return salt public

0x01：工具类

md5加密工具类
base64加密工具类
Bcrypt工具类

0x02：加密测试

MD5加密测试
base64加密测试
SHA加密测试
BCrypt加密测试

0x03、工具类

1. md5加密工具类

public class MD5Utils {
private static final String hexDigIts[] = {"0","1","2","3","4","5","6","7","8","9","a","b","c","d","e","f"};
/**     * MD5加密     * @param origin 字符     * @param charsetname 编码     * @return     */public static String MD5Encode(String origin, String charsetname){        String resultString = null;try{            resultString = new String(origin);            MessageDigest md = MessageDigest.getInstance("MD5");if(null == charsetname || "".equals(charsetname)){                resultString = byteArrayToHexString(md.digest(resultString.getBytes()));            }else{                resultString = byteArrayToHexString(md.digest(resultString.getBytes(charsetname)));            }        }catch (Exception e){        }return resultString;    }

public static String byteArrayToHexString(byte b[]){        StringBuffer resultSb = new StringBuffer();for(int i = 0; i < b.length; i++){            resultSb.append(byteToHexString(b[i]));        }return resultSb.toString();    }
public static String byteToHexString(byte b){int n = b;if(n < 0){            n += 256;        }int d1 = n / 16;int d2 = n % 16;return hexDigIts[d1] + hexDigIts[d2];    }
}

2. base64加密工具类

public class Base64Util {
// 字符串编码private static final String UTF_8 = "UTF-8";
/**     * 加密字符串     * @param inputData     * @return     */public static String decodeData(String inputData) {try {if (null == inputData) {return null;            }return new String(Base64.decodeBase64(inputData.getBytes(UTF_8)), UTF_8);        } catch (UnsupportedEncodingException e) {        }return null;    }
/**     * 解密加密后的字符串     * @param inputData     * @return     */public static String encodeData(String inputData) {try {if (null == inputData) {return null;            }return new String(Base64.encodeBase64(inputData.getBytes(UTF_8)), UTF_8);        } catch (UnsupportedEncodingException e) {        }return null;    }
public static void main(String[] args) {        System.out.println(Base64Util.encodeData("我是中文"));String enStr = Base64Util.encodeData("我是中文");        System.out.println(Base64Util.decodeData(enStr));    }}

3. Bcrypt工具类

public class BcryptCipher {// generate salt seedprivate static final int SALT_SEED = 12;// the head fo saltprivate static final String SALT_STARTSWITH = "$2a$12";
public static final String SALT_KEY = "salt";
public static final String CIPHER_KEY = "cipher";
/**   * Bcrypt encryption algorithm method   * @param encryptSource   * need to encrypt the string   * @return Map , two values in Map , salt and cipher   */public static Map<String, String> Bcrypt(final String encryptSource) {String salt = BCrypt.gensalt(SALT_SEED);    Map<String, String> bcryptResult = Bcrypt(salt, encryptSource);return bcryptResult;  }/**   *   * @param salt encrypt salt, Must conform to the rules   * @param encryptSource   * @return   */public static Map<String, String> Bcrypt(final String salt, final String encryptSource) {if (StringUtils.isBlank(encryptSource)) {throw new RuntimeException("Bcrypt encrypt input params can not be empty");    }
if (StringUtils.isBlank(salt) || salt.length() != 29) {throw new RuntimeException("Salt can't be empty and length must be to 29");    }if (!salt.startsWith(SALT_STARTSWITH)) {throw new RuntimeException("Invalid salt version, salt version is $2a$12");    }
String cipher = BCrypt.hashpw(encryptSource, salt);    Map<String, String> bcryptResult = new HashMap<String, String>();    bcryptResult.put(SALT_KEY, salt);    bcryptResult.put(CIPHER_KEY, cipher);return bcryptResult;  }
}

0x04：加密测试

1. MD5加密测试

/** * MD5加密 */public class MD5Test {public static void main(String[] args) {    String string = "我是一句话";    String byteArrayToHexString = MD5Utils.byteArrayToHexString(string.getBytes());    System.out.println(byteArrayToHexString);//e68891e698afe4b880e58fa5e8af9d
  }}

2. base64加密测试

/** * base64加密 */public class Bast64Tester {
public static void main(String[] args) {    String string = "我是一个字符串";    String encodeData = Base64Util.encodeData(string); //加密    String decodeData = Base64Util.decodeData(encodeData); //解密    System.out.println(encodeData);//5oiR5piv5LiA5Liq5a2X56ym5Liy    System.out.println(decodeData);//我是一个字符串
  }}

3. SHA加密测试

/** * SHA加密 */public class ShaTest {
public static void main(String[] args) {    String string = "我是一句话";
    String sha256Crypt = Sha2Crypt.sha256Crypt(string.getBytes());    System.out.println(sha256Crypt);//$5$AFoQTeyt$TiqmobvcQXjXaAQMYosAAO4KI8LfigZMGHzq.Dlp4NC
  }}

4. BCrypt加密测试

/** * BCrypt加密 */public class BCryptTest {
public static void main(String[] args) {
    String string = "我是一句话";    Map<String, String> bcrypt = BcryptCipher.Bcrypt(string);    System.out.println(bcrypt.keySet()); //[cipher, salt]
    System.out.println(bcrypt.get("cipher")); //$2a$12$ylb92Z84gqlrSfzIztlCV.dK0xNbw.pOv3UwXXA76llOsNRTJsE/.    System.out.println(bcrypt.get("salt")); //$2a$12$ylb92Z84gqlrSfzIztlCV.
    Map<String, String> bcrypt2 = BcryptCipher.Bcrypt(bcrypt.get("salt"),string);    System.out.println(bcrypt2.get("SALT_KEY")); //null    System.out.println(bcrypt2.get("CIPHER_KEY")); //null  }}

来源：my.oschina.net/u/4139951/blog/3077236

watermark,size_16,text_QDUxQ1RP5Y2a5a6i,color_FFFFFF,t_100,g_se,x_10,y_10,shadow_90,type_ZmFuZ3poZW5naGVpdGk=

标签：常用,加密,String,开发,static,return,salt,public
来源： https://blog.51cto.com/u_15259710/2986964

本站声明： 1. iCode9 技术分享网（下文简称本站）提供的所有内容，仅供技术学习、探讨和分享；
2. 关于本站的所有留言、评论、转载及引用，纯属内容发起人的个人观点，与本站观点和立场无关；
3. 关于本站的所有言论和文字，纯属内容发起人的个人观点，与本站观点和立场无关；
4. 本站文章均是网友提供，不完全保证技术分享内容的完整性、准确性、时效性、风险性和版权归属；如您发现该文章侵犯了您的权益，可联系我们第一时间进行删除；
5. 本站为非盈利性的个人网站，所有内容不会用来进行牟利，也不会利用任何形式的广告来间接获益，纯粹是为了广大技术爱好者提供技术内容和技术思想的分享性交流网站。

ICode9