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ntfy/cmd/user.go

288 lines
9.5 KiB
Go

package cmd
import (
"crypto/subtle"
"errors"
"fmt"
"github.com/urfave/cli/v2"
"github.com/urfave/cli/v2/altsrc"
"heckel.io/ntfy/auth"
"heckel.io/ntfy/util"
"strings"
)
var flagsUser = userCommandFlags()
var cmdUser = &cli.Command{
Name: "user",
Usage: "Manage/show users",
UsageText: "ntfy user [list|add|remove|change-pass|change-role] ...",
Flags: flagsUser,
Before: initConfigFileInputSource("config", flagsUser),
Category: categoryServer,
Subcommands: []*cli.Command{
{
Name: "add",
Aliases: []string{"a"},
Usage: "Adds a new user",
UsageText: "ntfy user add [--role=admin|user] USERNAME",
Before: inheritRootReaderFunc,
Action: execUserAdd,
Flags: []cli.Flag{
&cli.StringFlag{Name: "role", Aliases: []string{"r"}, Value: string(auth.RoleUser), Usage: "user role"},
},
Description: `Add a new user to the ntfy user database.
A user can be either a regular user, or an admin. A regular user has no read or write access (unless
granted otherwise by the auth-default-access setting). An admin user has read and write access to all
topics.
Examples:
ntfy user add phil # Add regular user phil
ntfy user add --role=admin phil # Add admin user phil
`,
},
{
Name: "remove",
Aliases: []string{"del", "rm"},
Usage: "Removes a user",
UsageText: "ntfy user remove USERNAME",
Before: inheritRootReaderFunc,
Action: execUserDel,
Description: `Remove a user from the ntfy user database.
Example:
ntfy user del phil
`,
},
{
Name: "change-pass",
Aliases: []string{"chp"},
Usage: "Changes a user's password",
UsageText: "ntfy user change-pass USERNAME",
Before: inheritRootReaderFunc,
Action: execUserChangePass,
Description: `Change the password for the given user.
The new password will be read from STDIN, and it'll be confirmed by typing
it twice.
Example:
ntfy user change-pass phil
`,
},
{
Name: "change-role",
Aliases: []string{"chr"},
Usage: "Changes the role of a user",
UsageText: "ntfy user change-role USERNAME ROLE",
Before: inheritRootReaderFunc,
Action: execUserChangeRole,
Description: `Change the role for the given user to admin or user.
This command can be used to change the role of a user either from a regular user
to an admin user, or the other way around:
- admin: an admin has read/write access to all topics
- user: a regular user only has access to what was explicitly granted via 'ntfy access'
When changing the role of a user to "admin", all access control entries for that
user are removed, since they are no longer necessary.
Example:
ntfy user change-role phil admin # Make user phil an admin
ntfy user change-role phil user # Remove admin role from user phil
`,
},
{
Name: "list",
Aliases: []string{"l"},
Usage: "Shows a list of users",
Before: inheritRootReaderFunc,
Action: execUserList,
Description: `Shows a list of all configured users, including the everyone ('*') user.
This is a server-only command. It directly reads from the user.db as defined in the server config
file server.yml. The command only works if 'auth-file' is properly defined.
This command is an alias to calling 'ntfy access' (display access control list).
`,
},
},
Description: `Manage users of the ntfy server.
This is a server-only command. It directly manages the user.db as defined in the server config
file server.yml. The command only works if 'auth-file' is properly defined. Please also refer
to the related command 'ntfy access'.
The command allows you to add/remove/change users in the ntfy user database, as well as change
passwords or roles.
Examples:
ntfy user list # Shows list of users (alias: 'ntfy access')
ntfy user add phil # Add regular user phil
ntfy user add --role=admin phil # Add admin user phil
ntfy user del phil # Delete user phil
ntfy user change-pass phil # Change password for user phil
ntfy user change-role phil admin # Make user phil an admin
`,
}
func execUserAdd(c *cli.Context) error {
username := c.Args().Get(0)
role := auth.Role(c.String("role"))
if username == "" {
return errors.New("username expected, type 'ntfy user add --help' for help")
} else if username == userEveryone {
return errors.New("username not allowed")
} else if !auth.AllowedRole(role) {
return errors.New("role must be either 'user' or 'admin'")
}
manager, err := createAuthManager(c)
if err != nil {
return err
}
if user, _ := manager.User(username); user != nil {
return fmt.Errorf("user %s already exists", username)
}
password, err := readPasswordAndConfirm(c)
if err != nil {
return err
}
if err := manager.AddUser(username, password, role); err != nil {
return err
}
fmt.Fprintf(c.App.ErrWriter, "user %s added with role %s\n", username, role)
return nil
}
func execUserDel(c *cli.Context) error {
username := c.Args().Get(0)
if username == "" {
return errors.New("username expected, type 'ntfy user del --help' for help")
} else if username == userEveryone {
return errors.New("username not allowed")
}
manager, err := createAuthManager(c)
if err != nil {
return err
}
if _, err := manager.User(username); err == auth.ErrNotFound {
return fmt.Errorf("user %s does not exist", username)
}
if err := manager.RemoveUser(username); err != nil {
return err
}
fmt.Fprintf(c.App.ErrWriter, "user %s removed\n", username)
return nil
}
func execUserChangePass(c *cli.Context) error {
username := c.Args().Get(0)
if username == "" {
return errors.New("username expected, type 'ntfy user change-pass --help' for help")
} else if username == userEveryone {
return errors.New("username not allowed")
}
manager, err := createAuthManager(c)
if err != nil {
return err
}
if _, err := manager.User(username); err == auth.ErrNotFound {
return fmt.Errorf("user %s does not exist", username)
}
password, err := readPasswordAndConfirm(c)
if err != nil {
return err
}
if err := manager.ChangePassword(username, password); err != nil {
return err
}
fmt.Fprintf(c.App.ErrWriter, "changed password for user %s\n", username)
return nil
}
func execUserChangeRole(c *cli.Context) error {
username := c.Args().Get(0)
role := auth.Role(c.Args().Get(1))
if username == "" || !auth.AllowedRole(role) {
return errors.New("username and new role expected, type 'ntfy user change-role --help' for help")
} else if username == userEveryone {
return errors.New("username not allowed")
}
manager, err := createAuthManager(c)
if err != nil {
return err
}
if _, err := manager.User(username); err == auth.ErrNotFound {
return fmt.Errorf("user %s does not exist", username)
}
if err := manager.ChangeRole(username, role); err != nil {
return err
}
fmt.Fprintf(c.App.ErrWriter, "changed role for user %s to %s\n", username, role)
return nil
}
func execUserList(c *cli.Context) error {
manager, err := createAuthManager(c)
if err != nil {
return err
}
users, err := manager.Users()
if err != nil {
return err
}
return showUsers(c, manager, users)
}
func createAuthManager(c *cli.Context) (auth.Manager, error) {
authFile := c.String("auth-file")
authDefaultAccess := c.String("auth-default-access")
if authFile == "" {
return nil, errors.New("option auth-file not set; auth is unconfigured for this server")
} else if !util.FileExists(authFile) {
return nil, errors.New("auth-file does not exist; please start the server at least once to create it")
} else if !util.InStringList([]string{"read-write", "read-only", "write-only", "deny-all"}, authDefaultAccess) {
return nil, errors.New("if set, auth-default-access must start set to 'read-write', 'read-only' or 'deny-all'")
}
authDefaultRead := authDefaultAccess == "read-write" || authDefaultAccess == "read-only"
authDefaultWrite := authDefaultAccess == "read-write" || authDefaultAccess == "write-only"
return auth.NewSQLiteAuth(authFile, authDefaultRead, authDefaultWrite)
}
func readPasswordAndConfirm(c *cli.Context) (string, error) {
fmt.Fprint(c.App.ErrWriter, "password: ")
password, err := util.ReadPassword(c.App.Reader)
if err != nil {
return "", err
}
fmt.Fprintf(c.App.ErrWriter, "\r%s\rconfirm: ", strings.Repeat(" ", 25))
confirm, err := util.ReadPassword(c.App.Reader)
if err != nil {
return "", err
}
fmt.Fprintf(c.App.ErrWriter, "\r%s\r", strings.Repeat(" ", 25))
if subtle.ConstantTimeCompare(confirm, password) != 1 {
return "", errors.New("passwords do not match: try it again, but this time type slooowwwlly")
}
return string(password), nil
}
func userCommandFlags() []cli.Flag {
return []cli.Flag{
&cli.StringFlag{Name: "config", Aliases: []string{"c"}, EnvVars: []string{"NTFY_CONFIG_FILE"}, Value: "/etc/ntfy/server.yml", DefaultText: "/etc/ntfy/server.yml", Usage: "config file"},
altsrc.NewStringFlag(&cli.StringFlag{Name: "auth-file", Aliases: []string{"H"}, EnvVars: []string{"NTFY_AUTH_FILE"}, Usage: "auth database file used for access control"}),
altsrc.NewStringFlag(&cli.StringFlag{Name: "auth-default-access", Aliases: []string{"p"}, EnvVars: []string{"NTFY_AUTH_DEFAULT_ACCESS"}, Value: "read-write", Usage: "default permissions if no matching entries in the auth database are found"}),
}
}
// inheritRootReaderFunc is a workaround for a urfave/cli bug that makes subcommands not inherit the App.Reader.
// This bug was fixed in master, but not in v2.3.0.
func inheritRootReaderFunc(ctx *cli.Context) error {
for _, c := range ctx.Lineage() {
if c.App != nil && c.App.Reader != nil {
ctx.App.Reader = c.App.Reader
}
}
return nil
}