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useradm.go
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useradm.go
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// Copyright 2016 Mender Software AS
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package main
import (
"time"
"github.com/pkg/errors"
"github.com/satori/go.uuid"
)
var (
ErrUnauthorized = errors.New("unauthorized")
ErrUserNotInitial = errors.New("user database not empty")
)
type UserAdmApp interface {
// Login accepts email/password, returns JWT
Login(email, pass string) (*Token, error)
CreateUser(u *UserModel) error
CreateUserInitial(u *UserModel) error
// SignToken returns a function that can be used for generating a signed
// token using configuration & method set up in UserAdmApp
SignToken() SignFunc
}
type UserAdmConfig struct {
// token issuer
Issuer string
// token expiration time
ExpirationTime int64
}
type UserAdm struct {
// JWT serialized/deserializer
jwtHandler JWTHandler
db DataStore
config UserAdmConfig
}
func NewUserAdm(jwtHandler JWTHandler, db DataStore, config UserAdmConfig) *UserAdm {
return &UserAdm{
jwtHandler: jwtHandler,
db: db,
config: config,
}
}
// this is a dummy method for now - always returns a valid JWT; no db interaction
func (u *UserAdm) Login(email, pass string) (*Token, error) {
if email == "" && pass == "" {
empty, err := u.db.IsEmpty()
if err != nil {
return nil, errors.Wrap(err, "useradm: failed to query database")
}
if !empty {
return nil, ErrUnauthorized
}
// initial login
t := u.generateInitialToken()
return t, nil
}
return nil, nil
}
func (u *UserAdm) generateInitialToken() *Token {
return &Token{
Claims: Claims{
ID: uuid.NewV4().String(),
Issuer: u.config.Issuer,
ExpiresAt: time.Now().Unix() + u.config.ExpirationTime,
Subject: "initial",
Scope: ScopeInitialUserCreate,
},
}
}
func (u *UserAdm) SignToken() SignFunc {
return func(t *Token) (string, error) {
return u.jwtHandler.ToJWT(t)
}
}
func (ua *UserAdm) CreateUser(u *UserModel) error {
u.ID = uuid.NewV4().String()
if err := ua.db.CreateUser(u); err != nil {
if err == ErrDuplicateEmail {
return err
}
return errors.Wrap(err, "useradm: failed to create user in the db")
}
return nil
}
func (ua *UserAdm) CreateUserInitial(u *UserModel) error {
empty, err := ua.db.IsEmpty()
if err != nil {
return errors.Wrap(err, "useradm: failed to check if db is empty")
}
if empty {
return ua.CreateUser(u)
} else {
return ErrUserNotInitial
}
}