If the user hasn't submitted a username or password, the script simply returns the original instance to the login page, but if the information is there, check it against the database.
如果用户并未提交用户名或密码，则脚本会把最初的实例返回给登录页面，但是如果有了这些信息，则通过数据库检查它们。
Message digests can be used to compare a user-provided password with an original password without having to store the original password.
可以使用消息摘要来比较用户所提供的密码和原始密码，而无需存储原始密码。
This interface will match the original SAPOutboundInterface with only one difference: we will add a couple of input parameters, so we can pass the username and password.
此接口会匹配原始的SAPOutboundInterface，仅有一处不同：我们将添加几个输入参数，以便能够传递用户名和密码。
Hashed passwords stored in a text file cannot be used to regenerate the original password, but they are potentially vulnerable to a dictionary attack.
储存在文字档中的杂凑密码无法用于重新产生原始密码，但它们可能容易受到字典攻击。
As it is impossible for us to retrieve your original password we have generated a new one.
由于我们无法找回你的最初密码，我们已经产生了一个新的密码。
If a user is updating their own password, the original password must be included in a modify delete with the new password being a modify add in the same modify operation.
如果用户在更新自己的密码，必须包括原始密码，在修改删除用新密码被修改添加相同的修改操作。
If a user is updating their own password, the original password must be included in a modify delete with the new password being a modify add in the same modify operation.
如果用户在更新自己的密码，必须包括原始密码，在修改删除用新密码被修改添加相同的修改操作。
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