将 Python 生成的哈希与 Java 中的原始密码进行比较时，盐修订无效

因此，我创建了一个数据库，用于存储用户信息及其哈希密码，该密码使用Python脚本使用bcrypt module.

现在要使用我的 Java 客户端登录，我使用的是JBCrypt库作为 Maven 依赖项包含在我的 IntelliJ 项目中。它检索哈希并且数据库连接工作正常，唯一的问题是它抛出此错误：

Exception in thread "AWT-EventQueue-0" java.lang.IllegalArgumentException: Invalid salt revision
    at org.mindrot.jbcrypt.BCrypt.hashpw(BCrypt.java:671)
    at org.mindrot.jbcrypt.BCrypt.checkpw(BCrypt.java:763)
    at mypackage.Login.validateUser(Login.java:81)
    at mypackage.Login.actionPerformed(Login.java:63)
    at java.desktop/javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1967)
    at java.desktop/javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2308)
    at java.desktop/javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:405)
    at java.desktop/javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:262)
    at java.desktop/javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:269)
    at java.desktop/java.awt.Component.processMouseEvent(Component.java:6578)
    at java.desktop/javax.swing.JComponent.processMouseEvent(JComponent.java:3343)
    at java.desktop/java.awt.Component.processEvent(Component.java:6343)
    at java.desktop/java.awt.Container.processEvent(Container.java:2259)
    at java.desktop/java.awt.Component.dispatchEventImpl(Component.java:4961)
    at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2317)
    at java.desktop/java.awt.Component.dispatchEvent(Component.java:4793)
    at java.desktop/java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4904)
    at java.desktop/java.awt.LightweightDispatcher.processMouseEvent(Container.java:4539)
    at java.desktop/java.awt.LightweightDispatcher.dispatchEvent(Container.java:4480)
    at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2303)
    at java.desktop/java.awt.Window.dispatchEventImpl(Window.java:2758)
    at java.desktop/java.awt.Component.dispatchEvent(Component.java:4793)
    at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:766)
    at java.desktop/java.awt.EventQueue.access$500(EventQueue.java:97)
    at java.desktop/java.awt.EventQueue$3.run(EventQueue.java:717)
    at java.desktop/java.awt.EventQueue$3.run(EventQueue.java:711)
    at java.base/java.security.AccessController.doPrivileged(Native Method)
    at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:89)
    at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:99)
    at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:739)
    at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:737)
    at java.base/java.security.AccessController.doPrivileged(Native Method)
    at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:89)
    at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:736)
    at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:199)
    at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
    at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
    at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
    at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
    at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)

检查的代码如下：

String dbHash = results.getString("password");
System.out.println(dbHash);
boolean result = BCrypt.checkpw(new String(passwordField.getPassword()), dbHash);

EDIT: An examplePython 模块脚本中的哈希密码和原始密码如下：

Raw:    zO/15;w|c'*uftH)
Hashed: $2b$12$7Y4ZmORuoH0dziYSg8dpd.PfvWQx2QPcoiRoGWg.HKfhuN6evEZnO

**编辑：**我注意到这是因为 JBCrypt 似乎不支持任何大于$2a哈希值。我找不到bcryptPython 的模块文档，所以我无法确定是否可以使用$2aPython 代码中的哈希值。

问题是JBCrypt。它已经过时了（它只能验证$2a hashes.

因此，为了解决这个问题，我必须更改 Python 脚本来生成使用$2a prefix:

可调整前缀

bcrypt 的另一项功能是可调节 前缀可让您定义将与哪些库保持兼容。 要调整此设置，请将 2a 或 2b（默认值）传递给 bcrypt.gensalt(prefix=b"2b") 作为字节对象。

https://pypi.python.org/pypi/bcrypt/3.1.0 https://pypi.python.org/pypi/bcrypt/3.1.0