ntfy/user/types.go
2022-12-27 22:14:14 -05:00

136 lines
3.7 KiB
Go

// Package user deals with authentication and authorization against topics
package user
import (
"errors"
"regexp"
)
type Auther interface {
// Authenticate checks username and password and returns a user if correct. The method
// returns in constant-ish time, regardless of whether the user exists or the password is
// correct or incorrect.
Authenticate(username, password string) (*User, error)
// Authorize returns nil if the given user has access to the given topic using the desired
// permission. The user param may be nil to signal an anonymous user.
Authorize(user *User, topic string, perm Permission) error
}
// User is a struct that represents a user
type User struct {
Name string
Hash string // password hash (bcrypt)
Token string // Only set if token was used to log in
Role Role
Grants []Grant
Prefs *Prefs
Plan *Plan
Stats *Stats
}
type Token struct {
Value string
Expires int64
}
type Prefs struct {
Language string `json:"language,omitempty"`
Notification *NotificationPrefs `json:"notification,omitempty"`
Subscriptions []*Subscription `json:"subscriptions,omitempty"`
}
type PlanCode string
const (
PlanUnlimited = PlanCode("unlimited")
PlanDefault = PlanCode("default")
PlanNone = PlanCode("none")
)
type Plan struct {
Code string `json:"name"`
Upgradable bool `json:"upgradable"`
MessagesLimit int64 `json:"messages_limit"`
EmailsLimit int64 `json:"emails_limit"`
AttachmentFileSizeLimit int64 `json:"attachment_file_size_limit"`
AttachmentTotalSizeLimit int64 `json:"attachment_total_size_limit"`
}
type Subscription struct {
ID string `json:"id"`
BaseURL string `json:"base_url"`
Topic string `json:"topic"`
DisplayName string `json:"display_name"`
}
type NotificationPrefs struct {
Sound string `json:"sound,omitempty"`
MinPriority int `json:"min_priority,omitempty"`
DeleteAfter int `json:"delete_after,omitempty"`
}
type Stats struct {
Messages int64
Emails int64
}
// Grant is a struct that represents an access control entry to a topic
type Grant struct {
TopicPattern string // May include wildcard (*)
AllowRead bool
AllowWrite bool
}
// Permission represents a read or write permission to a topic
type Permission int
// Permissions to a topic
const (
PermissionRead = Permission(1)
PermissionWrite = Permission(2)
)
// Role represents a user's role, either admin or regular user
type Role string
// User roles
const (
RoleAdmin = Role("admin")
RoleUser = Role("user")
RoleAnonymous = Role("anonymous")
)
// Everyone is a special username representing anonymous users
const (
Everyone = "*"
)
var (
allowedUsernameRegex = regexp.MustCompile(`^[-_.@a-zA-Z0-9]+$`) // Does not include Everyone (*)
allowedTopicPatternRegex = regexp.MustCompile(`^[-_*A-Za-z0-9]{1,64}$`) // Adds '*' for wildcards!
)
// AllowedRole returns true if the given role can be used for new users
func AllowedRole(role Role) bool {
return role == RoleUser || role == RoleAdmin
}
// AllowedUsername returns true if the given username is valid
func AllowedUsername(username string) bool {
return allowedUsernameRegex.MatchString(username)
}
// AllowedTopicPattern returns true if the given topic pattern is valid; this includes the wildcard character (*)
func AllowedTopicPattern(username string) bool {
return allowedTopicPatternRegex.MatchString(username)
}
// Error constants used by the package
var (
ErrUnauthenticated = errors.New("unauthenticated")
ErrUnauthorized = errors.New("unauthorized")
ErrInvalidArgument = errors.New("invalid argument")
ErrNotFound = errors.New("not found")
)