forked from Telodendria/Telodendria
219 lines
6.5 KiB
Groff
219 lines
6.5 KiB
Groff
.Dd $Mdocdate: March 6 2023 $
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.Dt USER 3
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.Os Telodendria Project
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.Sh NAME
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.Nm User
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.Nd Convenience functions for working with local users.
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.Sh SYNOPSIS
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.In User.h
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.Ft int
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.Fn UserValidate "char *" "char *"
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.Ft int
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.Fn UserHistoricalValidate "char *" "char *"
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.Ft int
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.Fn UserExists "Db *" "char *"
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.Ft User *
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.Fn UserCreate "Db *" "char *" "char *"
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.Ft User *
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.Fn UserLock "Db *" "char *"
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.Ft User *
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.Fn UserAuthenticate "Db *" "char *"
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.Ft int
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.Fn UserUnlock "User *"
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.Ft UserLoginInfo *
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.Fn UserLogin "User *" "char *" "char *" "char *" "int"
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.Ft char *
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.Fn UserGetName "User *"
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.Ft int
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.Fn UserCheckPassword "User *" "char *"
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.Ft int
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.Fn UserSetPassword "User *" "char *"
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.Ft int
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.Fn UserDeactivate "User *"
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.Ft HashMap *
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.Fn UserGetDevices "User *"
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.Ft UserAccessToken *
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.Fn UserGenerateAccessToken "User *" "char *" "int"
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.Ft int
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.Fn UserAccessTokenSave "Db *" "UserAccessToken *"
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.Ft void
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.Fn UserAccessTokenFree "UserAccessToken *"
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.Ft int
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.Fn UserDeleteToken "User *" "char *"
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.Ft int
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.Fn UserDeleteTokens "User *"
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.Ft UserId *
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.Fn UserIdParse "char *" "char *"
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.Ft void
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.Fn UserIdFree "UserId *"
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.Sh DESCRIPTION
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The
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.Nm
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API provides a wrapper over the database and offers an easy way for managing
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local users. It supports all of the locking mechanisms that the database does,
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and provides features for authenticating local users, among other tasks.
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.Pp
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.Bd -literal -offset indent
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typedef struct UserLoginInfo
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{
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UserAccessToken *accessToken;
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char *refreshToken;
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} UserLoginInfo;
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typedef struct UserAccessToken
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{
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char *user;
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char *string;
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char *deviceId;
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long lifetime;
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} UserAccessToken;
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typedef struct UserId
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{
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char *localpart;
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char *server;
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} UserId;
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.Ed
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.Pp
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.Fn UserValidate
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takes a localpart and domain as separate parameters and validates it against the
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rules of the Matrix specification. The reason the domain is required is because
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the spec imposes limitations on the length of the user name, and the longer the
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domain name is, the shorter the local part can be. This function is used to
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ensure that client-provided localparts are valid on this server.
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.Fn UserHistoricalValidate
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is called the exact same way, except it is a little more lenient. It is used to
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validate user parts on other servers, since some usernames might exist that are
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not fully spec compliant, but remain in use due to historical reasons.
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.Pp
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.Fn UserExists
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takes a localpart and checks whether or not it exists in the database.
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.Pp
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.Fn UserCreate
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creates a new user. It takes a localpart, which is assumed to be valid, and
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a password.
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.Pp
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.Fn UserLock
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takes a localpart and obtains a database reference to the user represented by that
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localpart. It behaves analogously to
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.Fn DbLock ,
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and in fact uses it under the hood to ensure that the user can only be modified
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by the thread that has locked the user.
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.Fn UserUnlock
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returns the user reference back to the database. It uses
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.Fn DbUnlock
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under the hood.
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.Pp
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.Fn UserAuthenticate
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takes an access token, figures out what user it belongs to, and returns the
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reference to that user. This function should be used by most endpoints that
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require valid user authentication, since most endpoints are authenticated via
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access tokens.
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.Pp
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.Fn UserLogin
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is used for logging in a user. It takes the user's password, device ID, device
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display name, and a boolean value indicating whether or not the client supports
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refresh tokens. This function logs in the user and generates an access token to be
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returned to the client.
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.Pp
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.Fn UserGetName
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gets the name attached to a user object. It can be used for the few cases where
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it's necessary to know the localpart of a user.
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.Pp
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.Fn UserCheckPassword
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takes a password and verifies it against a user object. Telodendria does not
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store passwords in plain text, so this function hashes the password and and
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checks it against what's stored in the database.
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.Pp
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.Fn UserSetPassword
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resets the given user's password by hashing a plain text password and
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storing it in the database.
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.Pp
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.Fn UserDeactivate
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deactivates a user such that it can no longer be used to log in, but
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the username is still taken. This is to prevent future users from
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pretending to be previous users of a given localpart.
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.Pp
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.Fn UserGetDevices
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fetches the devices that belong to the user, in JSON format,
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identical to what's stored in the database. In fact, this JSON is
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still linked to the database, so it should not be freed with
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.Fn JsonFree .
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.Pp
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.Fn UserAccessTokenGenerate ,
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.Fn UserAccessTokenSave ,
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and
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.Fn UserAccessTokenFree
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are used for managing individual access tokens on a user. They
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operate on the UserAccessToken structure.
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.Fn UserAccessTokenGenerate
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takes the user localpart to generate the token for, the device ID,
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for the token, and a boolean value indicating whether or not the token
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should expire.
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.Fn UserAccessTokenSave
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writes the access token to the database.
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.Pp
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.Fn UserDeleteToken
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and
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.Fn UserDeleteTokens
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delete a specific access token/refresh token pair, or all the access
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and refresh tokens for a given user, respectively.
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.Pp
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.Fn UserIdParse
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parses either a localpart or a fully-qualified Matrix ID.
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.Fn UserIdFree
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frees the result of this parsing.
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.Sh RETURN VALUES
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.Pp
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.Fn UserValidate ,
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.Fn UserHistoricalValidate ,
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.Fn UserExists ,
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.Fn UserUnlock ,
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.Fn UserCheckPassword ,
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.Fn UserSetPassword ,
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.Fn UserDeactivate ,
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.Fn UserAccessTokenSave ,
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.Fn UserDeleteToken ,
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and
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.Fn UserDeleteTokens
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all return a boolean value. Non-zero values indicate success, and zero values
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indicate failure.
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.Pp
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.Fn UserCreate ,
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.Fn UserLock ,
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and
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.Fn UserAuthenticate
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return a pointer to a User, or NULL if an error occurred.
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.Pp
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.Fn UserGetName
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returns a pointer to the string that holds the localpart of the user represented
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by the given user pointer. This pointer should not be freed by the caller , as it
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is used internally and will be freed when the user is unlocked.
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.Pp
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.Fn UserLogin
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returns a UserLoginInfo struct, or
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.Dv NULL
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if something goes wrong.
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All this information should be returned to the client that is logging in. If the
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client doesn't support refresh tokens, then refreshToken will be NULL.
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.Pp
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.Fn UserGetDevices
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returns a JSON object that is linked to the database, or NULL if
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there was an error. The result should not be freed with
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.Fn JsonFree
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because it is still directly attached to the database. This object
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is an exact representation of what is stored on the disk.
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.Pp
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.Fn UserAccessTokenGenerate
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generates an access token structure that should be freed when it is
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no longer needed, or
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.Dv NULL
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if there was a memory error.
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.Pp
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.Fn UserIdParse
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returns a UserId structure that should be freed when it is no longer
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needed, or
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.Dv NULL
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if there was a memory error.
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.Sh SEE ALSO
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.Xr Db 3
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