工具类

  2. public class BcryptCipher {
  3.   // generate salt seed
  4.   private static final int SALT_SEED = 12;
  5.   // the head fo salt
  6.   private static final String SALT_STARTSWITH = "$2a$12";
  8.   public static final String SALT_KEY = "salt";
  10.   public static final String CIPHER_KEY = "cipher";
  12.   /**
  13.    * Bcrypt encryption algorithm method
  14.    * @param encryptSource
  15.    * need to encrypt the string
  16.    * @return Map , two values in Map , salt and cipher
  17.    */
  18.   public static Map<String, String> Bcrypt(final String encryptSource) {
  19.     String salt = BCrypt.gensalt(SALT_SEED);
  20.     Map<String, String> bcryptResult = Bcrypt(salt, encryptSource);
  21.     return bcryptResult;
  22.   }
  23.   /**
  24.    *
  25.    * @param salt encrypt salt, Must conform to the rules
  26.    * @param encryptSource
  27.    * @return
  28.    */
  29.   public static Map<String, String> Bcrypt(final String salt, final String encryptSource) {
  30.     if (StringUtils.isBlank(encryptSource)) {
  31.       throw new RuntimeException("Bcrypt encrypt input params can not be empty");
  32.     }
  34.     if (StringUtils.isBlank(salt) || salt.length() != 29) {
  35.       throw new RuntimeException("Salt can't be empty and length must be to 29");
  36.     }
  37.     if (!salt.startsWith(SALT_STARTSWITH)) {
  38.       throw new RuntimeException("Invalid salt version, salt version is $2a$12");
  39.     }
  41.     String cipher = BCrypt.hashpw(encryptSource, salt);
  42.     Map<String, String> bcryptResult = new HashMap<String, String>();
  43.     bcryptResult.put(SALT_KEY, salt);
  44.     bcryptResult.put(CIPHER_KEY, cipher);
  45.     return bcryptResult;
  46.   }
  48. }

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
  }
}