所以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bcrypt模块的Python脚本进行哈希处理。
现在要使用我的 Java 客户端登录，我正在使用作为 Maven 依赖项包含在我的 IntelliJ 项目中的JBCrypt库。它检索哈希并且数据库连接运行良好，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)
检查代码如下：
String dbHash = results.getString("password");
System.out.println(dbHash);
boolean result = BCrypt.checkpw(new String(passwordField.getPassword()), dbHash);
编辑：来自Python模块脚本的哈希密码和原始密码的示例如下：
Raw: zO/15;w|c'*uftH)
Hashed: $2b$12$7Y4ZmORuoH0dziYSg8dpd.PfvWQx2QPcoiRoGWg.HKfhuN6evEZnO
**编辑：**我注意到这是因为JBCrypt似乎不支持大于$2a哈希的任何内容。我找不到 Python 的bcrypt模块文档，因此无法确定是否可以在 Python 代码中使用$2a哈希。
问题是JBCrypt的问题。它已过时(它只能验证$2a哈希。
因此，为了解决这个问题，我不得不更改 Python 脚本以生成一个使用 $2a 前缀的盐：
可调整前缀
bcrypt的另一个功能是可调节的 前缀，以允许您定义与哪些库保持兼容。 要调整此设置，请将 2a 或 2b(默认值(传递给 bcrypt.gensalt(prefix=b"2b"( 作为字节对象。
https://pypi.python.org/pypi/bcrypt/3.1.0
从源代码来看，异常似乎来自检查散列密码的格式：
if (salt.charAt(0) != '$' || salt.charAt(1) != '2')
throw new IllegalArgumentException ("Invalid salt version");
if (salt.charAt(2) == '$')
off = 3;
else {
minor = salt.charAt(2);
if (minor != 'a' || salt.charAt(3) != '$')
throw new IllegalArgumentException ("Invalid salt revision");
off = 4;
}
所以我的猜测是dbHash由于某种原因与格式不匹配。它是由不兼容的版本生成的。或者它实际上没有散列。或空。