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Admin For all operations, admin permissions are needed to execute all of the following commandsrequired: =Commands= '''Creating Create user 'test' (password will be entered on command line). By default, the user will have no permissions ('none'):
As global permissions, you can set 'none', 'read', 'Grant local write', 'create' and 'admin': '''Grant all permissions to user 'test': '''
<code>> GRANT admin TO test</code> Valid local permissions are 'none', 'read' and 'write': '''Granting write permission on database 'factbook' to user 'test': ''' <code>> GRANT write ON factbook unit* TO test</code>
'''Showing local permissions on database 'factbook':'''
'''Dropping of user 'test':'''Salted SHA256 hashes are used for authentication (the current timestamp will be used as salt). Additionally, digest hashes are used in the client/server architecture and the [[Clients|Language Bindings]], and in the [[Web Application|HTTP Context]] if {{Option|AUTHMETHOD}} is set to {{Code|Digest}}.
<code>> DROP USER test</code> =Changelog=
[[Category:Server]]Revised in Version 8.0.
db:create → user:create
This article is part of the [[Advanced User's Guide]].The user management defines which permissions are requiredby a user to perform a specific database command or XQuery expression. Permissions are mostly relevant in the client/server architecture, as the [[CommandsGUI]] and the [[Command-Line Client]] is run with admin permissions. There are a few exceptions such as the [[XQuery Module#xquery:eval|database commandxquery:eval]]function: Its execution scope can also be limited by specifying a permission. Please take care of usual security measures: ensure that your password will not end up in your bash history, avoid sending passwords via ordinary REST requests, etc. ==Rules==
In the permission hierarchy below, the existing permissions are illustrated.
A higher permission includes all lower permissions.
For example, all users who have the <code>WRITEwrite</code> permission assignedwill also be able to execute commands requiring <code>READread</code> permission.Next, local Local permissions can be assigned are applied to databases, which . They have a higher precedenceand override globaluser settingspermissions.
[[File:perms.png|none|thumb|200px|Permissions hierarchy]]
User names must follow the [[Valid user Names|valid names may contain lettersconstraints]], numbers,underslashes and dashes (defined by the regular expression <code>database patterns must follow the [-_a-zA-Z0-9[Commands#Glob_Syntax|Glob Syntax]]+</code>).
==CommandsOperations==
<code>> CREATE USER test</code>
'''Change password of user 'test' password (password will be entered on command line)to '71x343sd#':
<code>> ALTER USER PASSWORD test71x343sd#</code>
Note: Local permissions overwrite global permissions.
As a consequence, the 'test' user will only be allowed toaccess (i.e., read and write) database starting with the letters 'factbookunit' database.If no local permissions are set, the global rights areinherited.
'''Showing Show global permissions:'''
<code>> SHOW USERS</code>
==XQuery== The available user functions are listed in the [[User Module]]: '''Create user 'test' with no permissions:''' <code>> SHOW USERS ON factbookuser:create('test', 'top-secret')</code> '''Show detailed information about user 'test':''' <code>user:list-details()[@name = 'test']</code> '''Drop user 'test':''' <code>user:drop('test')</code> =Storage= The permission file {{Code|users.xml}} is stored in the database directory. This file can be manually edited; it will be parsed once when BaseX is started.
