feat: [safety] string encrypt input.

[pppanghu77]

1.encrypt dbus pwd input

Log: as title
Bug: https://pms.uniontech.com/bug-view-259823.html

[deepin-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: pppanghu77

The full list of commands accepted by this bot can be found here.

Needs approval from an approver in each of these files:

• debian/deepin/OWNERS

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[deepin-ci-robot]

deepin pr auto review

关键摘要:

• 在encryptPasswd函数中，直接使用toBase64可能会导致明文密码被错误地编码为Base64，应该先将密码转换为字节数组再进行Base64编码。
• decryptPasswd函数中，使用fromBase64直接解码可能会导致错误的密码被解析为明文，应该先将Base64编码的字节数组解析为QString再转换为明文。
• encryptPasswd函数中的加密逻辑（将明文转换为Base64编码的字节数组）可能不适用于所有场景，应该考虑使用加密插件来处理密码加密。
• decryptPasswd函数中的解密逻辑（将Base64编码的字节数组解析为QString再转换为明文）可能不适用于所有场景，应该考虑使用加密插件来处理密码解密。

是否建议立即修改:
是

[pppanghu77]

/merge