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Editando PmWiki.Passwords

%audience% authors

[[PmWiki]] has built-in support for password-protecting various areas of the wiki site.  Authors generally want to be able to apply passwords to individual pages or to [[wiki group]]s.  Wiki Administrators can apply passwords to individual pages, to wiki groups, or to the entire site.  As with any access control system, the password protection mechanisms described here are only a small part of overall system and wiki [[security]].

!!As an author editing pages...

An author will generally use 3 types of passwords:
# to control who can see a page or group, use  @@read@@ passwords
# to control who can edit a page or group, use @@edit@@ passwords
# to control who can alter the passwords used to protect a page or group, use @@attr@@ passwords

'''''To set a password on an individual wiki page,''''' add @@?action=attr@@ to the page's URL (address) to access its attributes.  Using the small form on the attributes page, you can set or clear the @@read@@, @@edit@@, or @@attr@@ passwords on the page.  In the form you enter the passwords as cleartext; PmWiki encrypts them for you automatically when it stores them. Leaving a field blank will leave the attribute unchanged. To remove a password from a page (reverting back to the group's or site's default), enter "clear".  To indicate that the page can be edited even if a group or site password is set, enter "nopass".

'''''To set a password on a wiki group''''' is slightly more difficult--you just set the passwords on a special page in each group called "[[GroupAttributes]]".  First, you can get to the attributes page for `GroupAttributes by entering a URL (address) like [@http://www.example.com/pmwiki?n=GroupName.GroupAttributes?action=attr@].  Then, using the small form on the attributes page, you can set or clear the @@read@@, @@edit@@, or @@attr@@ passwords for the entire group.  In the form you enter the passwords as cleartext; PmWiki encrypts them for you automatically.

'''''Multiple passwords for a page, group or site''''' are allowed. Simply enter multiple passwords separated by a space. This allows you to have a read password, a write password, and have the write password allow read/write access.\\
In other words, if the read password is "alpha" and the edit password is beta, then enter

-> [@
Set new read password: alpha beta
Set new edit password: beta
@]

This says that either "alpha" or "beta" can be used to read pages, but only "beta" may edit. Since [@PmWiki@] checks the passwords you've entered since the browser has been opened, entering a read password that is also a write password allows both reading and writing.

%audience% administrators

!!As an administrator ...

You can set passwords on pages and groups exactly as described above for authors. You can also:
# set site-wide passwords for pages and groups that do not have passwords
# use @@attr@@ passwords to control who is able to set passwords on pages
# use @@upload@@ passwords to control access to the file [[upload(s)]] capabilities (if uploads are enabled)
# use an @@admin@@ password to override the passwords set for any individual page or group  
For more information on password options available to administrators, see [[PasswordsAdmin]].

!!Which password wins?

In PmWiki, page passwords override group passwords, group passwords override the default passwords, and the @@admin@@ password overrides all passwords.  This gives a great deal of flexibility in controlling access to wiki pages in PmWiki.

!!Opening access to pages in protected groups/sites

Sometimes we want to "unprotect" pages in a group or site that is otherwise protected.  In these cases, the special password "nopass" is used to indicate that access should be allowed to a page without requiring a password.

For example, suppose `Main.GroupAttributes has an edit password set, thus restricting the editing of all pages in Main.  Now we want `Main.WikiSandbox to be editable without a password.  Using "clear" for the edit password for `Main.WikiSandbox doesn't unprotect the page, because the password is being set by the group.  Instead, we set the edit password for `Main.WikiSandbox to the special value "nopass", which tells PmWiki to ignore any site-wide or group-level passwords for that page.

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