blocks|key|659241|text|您读过Linux-PAM应用程序开发人员指南吗？在RHEL类型的系统上，它将在/usr/share/doc/pam-devel-<version>/Linux-PAM_ADG.txt中，或者您可以在online+at+various+places上在线找到它。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|659242|请看“获取PAM项”部分，该部分记录了pam_get_item()函数。您可以使用PAM_AUTH_TOK常量请求密码：|659243|659244|+PAM_AUTHTOK|blockquote|659245|659246|身份验证令牌(通常是密码)。除了pam_sm_authenticate(3)和pam_sm_chauthtok+(3)之外，所有模块函数都应该忽略此内标识。在前一个函数中，它用于将最新的身份验证令牌从一个堆叠模块传递到另一个模块。在后一个函数中，令牌用于另一个目的。它包含当前活动的身份验证令牌。|659247|entityMap|0|LINK|mutability|MUTABLE|url|http://ftp.osuosl.org/pub/linux/libs/pam/Linux-PAM-html/Linux-PAM_ADG.html^0|13|1G|2R|O|0|0|J|E|15|C|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@$9|X|A|Y|B|C]]|D|@$9|Z|A|10|1|11]]|E|$]]|$1|F|3|G|5|6|7|12|8|@$9|13|A|14|B|C]|$9|15|A|16|B|C]]|D|@]|E|$]]|$1|H|3|-4|5|6|7|17|8|@]|D|@]|E|$]]|$1|I|3|J|5|K|7|18|8|@]|D|@]|E|$]]|$1|L|3|-4|5|6|7|19|8|@]|D|@]|E|$]]|$1|M|3|N|5|6|7|1A|8|@]|D|@]|E|$]]|$1|O|3|-4|5|6|7|1B|8|@]|D|@]|E|$]]]|P|$Q|$5|R|S|T|E|$U|V]]]]

Have you read the Linux-PAM Application Developer's Guide? On a RHEL-type system this will be in <code>/usr/share/doc/pam-devel-&lt;version&gt;/Linux-PAM_ADG.txt</code>, or you can find it online at <a href="http://ftp.osuosl.org/pub/linux/libs/pam/Linux-PAM-html/Linux-PAM_ADG.html" rel="nofollow">online at various places</a>.

Take a look at the Getting PAM items section, which documents the <code>pam_get_item()</code> function. You can request the password with the <code>PAM_AUTH_TOK</code> constant:

<blockquote>
 PAM_AUTHTOK

<pre><code>The authentication token (often a password). This token should be ignored
by all module functions besides pam_sm_authenticate(3) and pam_sm_chauthtok
(3). In the former function it is used to pass the most recent
authentication token from one stacked module to another. In the latter
function the token is used for another purpose. It contains the currently
active authentication token.
</code></pre>
</blockquote>

blocks|key|1024865|text|在调试时只打印PAM_AUTHTOK的内容如何？要对其进行有意义的使用，您必须在模块之间有某种约定或约定。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1024866|顺便说一句:在内存中保留明文密码并尽快将其从内存中删除(或者更好:在RAM中锁定该区域，或者加密交换)与将明文密码写入磁盘之间是有区别的。后者太不安全了，不要那样做。|1024867|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

How about just printing the contents of PAM_AUTHTOK when you're debugging? To make a meaningful use of it you must have some sort of a contract or convention between modules anyway.

By the way: there is a difference between keeping a cleartext password in memory and erasing it from there as soon as possible (or better: locking that region in RAM, or having encrypted swap), and writing that cleartext password to disk. The latter is just sooo insecure, don't do that.

blocks|key|1041438|text|这是一个非常老的线程，但也有pam_exec：https://linux.die.net/man/8/pam_exec|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1041439|例如，PAM配置中类似以下内容：|1041440|auth+sufficient+pam_exec.so+expose_authtok+/usr/local/bin/myscript-example|code-block|syntax|javascript|1041441|myscript的内容-示例，回显所有变量：|1041442|#!/bin/sh
read+password
echo+"User:+$PAM_USER"
echo+"Ruser:+$PAM_RUSER"
echo+"Rhost:+$PAM_RHOST"
echo+"Service:+$PAM_SERVICE"
echo+"TTY:+$PAM_TTY"
echo+"Password+:+$password"
exit+$?|1041443|entityMap|0|LINK|mutability|MUTABLE|url|https://linux.die.net/man/8/pam_exec^0|N|10|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@$A|X|B|Y|1|Z]]|C|$]]|$1|D|3|E|5|6|7|10|8|@]|9|@]|C|$]]|$1|F|3|G|5|H|7|11|8|@]|9|@]|C|$I|J]]|$1|K|3|L|5|6|7|12|8|@]|9|@]|C|$]]|$1|M|3|N|5|H|7|13|8|@]|9|@]|C|$I|J]]|$1|O|3|-4|5|6|7|14|8|@]|9|@]|C|$]]]|P|$Q|$5|R|S|T|C|$U|V]]]]

This is a very old thread, but there is also pam_exec:
<a href="https://linux.die.net/man/8/pam_exec" rel="noreferrer">https://linux.die.net/man/8/pam_exec</a>

e.g. Something like the following in the PAM Config:

<pre><code>auth sufficient pam_exec.so expose_authtok /usr/local/bin/myscript-example
</code></pre>

Contents of myscript-example, echoing all the vars out:

<pre><code>#!/bin/sh
read password
echo "User: $PAM_USER"
echo "Ruser: $PAM_RUSER"
echo "Rhost: $PAM_RHOST"
echo "Service: $PAM_SERVICE"
echo "TTY: $PAM_TTY"
echo "Password : $password"
exit $?
</code></pre>

I am writing a PAM module which writes the username/password in a file for further transaction by an other application. I only saw the PAM_AUTHTOK item but I'm not sure from which type is it. Anybody knows that or another way to get the cleartext password?

How to retrieve user password in cleartext using PAM?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我正在编写一个PAM模块，它将用户名/密码写在一个文件中，供其他应用程序进一步处理。我只看到了PAM_AUTHTOK项，但我不确定它来自哪种类型。有没有人知道这一点，或者其他获得明文密码的方法？

问如何使用PAM以明文形式检索用户密码？
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问如何使用PAM以明文形式检索用户密码？EN