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|
package main
import (
"crypto/rand"
"crypto/sha256"
"database/sql"
"encoding/hex"
"errors"
"fmt"
"regexp"
"strings"
"time"
"golang.org/x/crypto/bcrypt"
"golang.org/x/crypto/ssh"
_ "modernc.org/sqlite"
)
const schema = `
create table if not exists users (
id integer primary key,
name text not null unique,
hash text not null,
created integer not null
);
create table if not exists sessions (
id text primary key,
user integer not null references users(id) on delete cascade,
created integer not null
);
create table if not exists keys (
id integer primary key,
user integer not null references users(id) on delete cascade,
fingerprint text not null unique,
public text not null,
title text not null,
created integer not null
);
create table if not exists tokens (
id integer primary key,
user integer not null references users(id) on delete cascade,
hash text not null unique,
title text not null,
created integer not null
);
create table if not exists repos (
id integer primary key,
owner integer not null references users(id) on delete cascade,
name text not null,
description text not null default '',
private integer not null default 0,
created integer not null,
unique(owner, name)
);
create table if not exists invites (
code text primary key,
used integer not null default 0
);
`
var migrations = []string{
`alter table users add column bio text not null default ''`,
`alter table users add column location text not null default ''`,
`alter table users add column workplace text not null default ''`,
`alter table users add column website text not null default ''`,
`alter table users add column avatar integer not null default 0`,
`alter table users add column display text not null default ''`,
}
type Profile struct {
Display string
Bio string
Location string
Workplace string
Website string
Avatar int64
}
var nameRe = regexp.MustCompile(`^[a-z0-9][a-z0-9_.-]{0,38}$`)
var ErrNotFound = errors.New("not found")
type User struct {
ID int64
Name string
Created time.Time
}
type Repo struct {
ID int64
Owner User
Name string
Description string
Private bool
Created time.Time
}
type Key struct {
ID int64
Fingerprint string
Public string
Title string
Created time.Time
}
type Token struct {
ID int64
Title string
Created time.Time
}
type Store struct {
db *sql.DB
}
func openStore(path string, readonly bool) (*Store, error) {
dsn := "file:" + path + "?_pragma=busy_timeout(5000)&_pragma=journal_mode(wal)&_pragma=foreign_keys(1)"
if readonly {
dsn += "&mode=ro"
}
db, err := sql.Open("sqlite", dsn)
if err != nil {
return nil, err
}
if !readonly {
if _, err := db.Exec(schema); err != nil {
return nil, err
}
for _, m := range migrations {
if _, err := db.Exec(m); err != nil && !strings.Contains(err.Error(), "duplicate column") {
return nil, err
}
}
}
return &Store{db}, nil
}
func random(n int) string {
b := make([]byte, n)
if _, err := rand.Read(b); err != nil {
panic(err)
}
return hex.EncodeToString(b)
}
func validName(name string) bool {
return nameRe.MatchString(name) && !strings.HasSuffix(name, ".git")
}
func checkCredentials(name, password string) error {
if !validName(name) {
return errors.New("Names are lowercase letters, digits, dot, dash or underscore, at most 39 characters")
}
if len(password) < 8 {
return errors.New("Password must be at least 8 characters")
}
if len(password) > 256 {
return errors.New("Password must be at most 256 characters")
}
return nil
}
func (s *Store) CreateUser(name, password string) (User, error) {
if err := checkCredentials(name, password); err != nil {
return User{}, err
}
hash, err := bcrypt.GenerateFromPassword([]byte(password), bcrypt.DefaultCost)
if err != nil {
return User{}, err
}
now := time.Now()
res, err := s.db.Exec(`insert into users(name, hash, created) values (?, ?, ?)`, name, string(hash), now.Unix())
if err != nil {
if strings.Contains(err.Error(), "UNIQUE") {
return User{}, errors.New("That name is taken")
}
return User{}, err
}
id, _ := res.LastInsertId()
return User{ID: id, Name: name, Created: now}, nil
}
func (s *Store) UserByName(name string) (User, error) {
var u User
var created int64
err := s.db.QueryRow(`select id, name, created from users where name = ?`, name).Scan(&u.ID, &u.Name, &created)
if err == sql.ErrNoRows {
return u, ErrNotFound
}
u.Created = time.Unix(created, 0)
return u, err
}
func (s *Store) userByID(id int64) (User, error) {
var u User
var created int64
err := s.db.QueryRow(`select id, name, created from users where id = ?`, id).Scan(&u.ID, &u.Name, &created)
if err == sql.ErrNoRows {
return u, ErrNotFound
}
u.Created = time.Unix(created, 0)
return u, err
}
func (s *Store) CheckPassword(name, password string) (User, bool) {
var u User
var hash string
var created int64
err := s.db.QueryRow(`select id, name, hash, created from users where name = ?`, name).Scan(&u.ID, &u.Name, &hash, &created)
if err != nil {
bcrypt.CompareHashAndPassword([]byte("$2a$10$000000000000000000000uGJ8z1gQ7yP1cqeI4qzj6WmLIl3JcP6W"), []byte(password))
return u, false
}
u.Created = time.Unix(created, 0)
return u, bcrypt.CompareHashAndPassword([]byte(hash), []byte(password)) == nil
}
func (s *Store) SetPassword(user int64, password string) error {
if err := checkCredentials("x", password); err != nil {
return err
}
hash, err := bcrypt.GenerateFromPassword([]byte(password), bcrypt.DefaultCost)
if err != nil {
return err
}
_, err = s.db.Exec(`update users set hash = ? where id = ?`, string(hash), user)
return err
}
func (s *Store) CreateSession(user int64) (string, error) {
id := random(32)
_, err := s.db.Exec(`insert into sessions(id, user, created) values (?, ?, ?)`, id, user, time.Now().Unix())
return id, err
}
func (s *Store) SessionUser(id string) (User, error) {
var user int64
err := s.db.QueryRow(`select user from sessions where id = ? and created > ?`, id, time.Now().Add(-90*24*time.Hour).Unix()).Scan(&user)
if err != nil {
return User{}, ErrNotFound
}
return s.userByID(user)
}
func (s *Store) DeleteSession(id string) {
s.db.Exec(`delete from sessions where id = ?`, id)
}
func (s *Store) DeleteSessions(user int64) {
s.db.Exec(`delete from sessions where user = ?`, user)
}
func (s *Store) AddKey(user int64, title, public string) error {
pub, comment, _, _, err := ssh.ParseAuthorizedKey([]byte(public))
if err != nil {
return errors.New("That is not a valid OpenSSH public key")
}
if title == "" {
title = comment
}
if title == "" {
title = "key"
}
line := strings.TrimSpace(string(ssh.MarshalAuthorizedKey(pub)))
_, err = s.db.Exec(`insert into keys(user, fingerprint, public, title, created) values (?, ?, ?, ?, ?)`,
user, ssh.FingerprintSHA256(pub), line, title, time.Now().Unix())
if err != nil && strings.Contains(err.Error(), "UNIQUE") {
return errors.New("That key is already registered")
}
return err
}
func (s *Store) Keys(user int64) ([]Key, error) {
rows, err := s.db.Query(`select id, fingerprint, public, title, created from keys where user = ? order by id`, user)
if err != nil {
return nil, err
}
defer rows.Close()
var keys []Key
for rows.Next() {
var k Key
var created int64
if err := rows.Scan(&k.ID, &k.Fingerprint, &k.Public, &k.Title, &created); err != nil {
return nil, err
}
k.Created = time.Unix(created, 0)
keys = append(keys, k)
}
return keys, rows.Err()
}
func (s *Store) DeleteKey(user, id int64) error {
_, err := s.db.Exec(`delete from keys where user = ? and id = ?`, user, id)
return err
}
func (s *Store) UserByKey(public string) (User, error) {
pub, _, _, _, err := ssh.ParseAuthorizedKey([]byte(public))
if err != nil {
return User{}, err
}
var user int64
err = s.db.QueryRow(`select user from keys where fingerprint = ?`, ssh.FingerprintSHA256(pub)).Scan(&user)
if err != nil {
return User{}, ErrNotFound
}
return s.userByID(user)
}
func tokenHash(token string) string {
sum := sha256.Sum256([]byte(token))
return hex.EncodeToString(sum[:])
}
func (s *Store) CreateToken(user int64, title string) (string, error) {
if title == "" {
title = "token"
}
token := random(24)
_, err := s.db.Exec(`insert into tokens(user, hash, title, created) values (?, ?, ?, ?)`, user, tokenHash(token), title, time.Now().Unix())
return token, err
}
func (s *Store) Tokens(user int64) ([]Token, error) {
rows, err := s.db.Query(`select id, title, created from tokens where user = ? order by id`, user)
if err != nil {
return nil, err
}
defer rows.Close()
var tokens []Token
for rows.Next() {
var t Token
var created int64
if err := rows.Scan(&t.ID, &t.Title, &created); err != nil {
return nil, err
}
t.Created = time.Unix(created, 0)
tokens = append(tokens, t)
}
return tokens, rows.Err()
}
func (s *Store) DeleteToken(user, id int64) error {
_, err := s.db.Exec(`delete from tokens where user = ? and id = ?`, user, id)
return err
}
func (s *Store) UserByToken(name, token string) (User, bool) {
var user int64
err := s.db.QueryRow(`select t.user from tokens t join users u on u.id = t.user where u.name = ? and t.hash = ?`, name, tokenHash(token)).Scan(&user)
if err != nil {
return User{}, false
}
u, err := s.userByID(user)
return u, err == nil
}
func (s *Store) CreateRepo(owner User, name, description string, private bool) (Repo, error) {
if !validName(name) || name == "avatar" {
return Repo{}, errors.New("Repository names are lowercase letters, digits, dot, dash or underscore")
}
now := time.Now()
res, err := s.db.Exec(`insert into repos(owner, name, description, private, created) values (?, ?, ?, ?, ?)`,
owner.ID, name, description, private, now.Unix())
if err != nil {
if strings.Contains(err.Error(), "UNIQUE") {
return Repo{}, errors.New("You already have a repository with that name")
}
return Repo{}, err
}
id, _ := res.LastInsertId()
return Repo{ID: id, Owner: owner, Name: name, Description: description, Private: private, Created: now}, nil
}
func scanRepos(rows *sql.Rows) ([]Repo, error) {
defer rows.Close()
var repos []Repo
for rows.Next() {
var r Repo
var private int
var created, ucreated int64
if err := rows.Scan(&r.ID, &r.Name, &r.Description, &private, &created, &r.Owner.ID, &r.Owner.Name, &ucreated); err != nil {
return nil, err
}
r.Private = private != 0
r.Created = time.Unix(created, 0)
r.Owner.Created = time.Unix(ucreated, 0)
repos = append(repos, r)
}
return repos, rows.Err()
}
const repoColumns = `r.id, r.name, r.description, r.private, r.created, u.id, u.name, u.created from repos r join users u on u.id = r.owner`
func (s *Store) RepoByPath(owner, name string) (Repo, error) {
rows, err := s.db.Query(`select `+repoColumns+` where u.name = ? and r.name = ?`, owner, name)
if err != nil {
return Repo{}, err
}
repos, err := scanRepos(rows)
if err != nil {
return Repo{}, err
}
if len(repos) == 0 {
return Repo{}, ErrNotFound
}
return repos[0], nil
}
func (s *Store) ReposByOwner(owner int64, includePrivate bool) ([]Repo, error) {
rows, err := s.db.Query(`select `+repoColumns+` where r.owner = ? and (r.private = 0 or ?) order by r.name`, owner, includePrivate)
if err != nil {
return nil, err
}
return scanRepos(rows)
}
func (s *Store) RecentRepos(n int) ([]Repo, error) {
rows, err := s.db.Query(`select `+repoColumns+` where r.private = 0 order by r.created desc limit ?`, n)
if err != nil {
return nil, err
}
return scanRepos(rows)
}
func (s *Store) UpdateRepo(id int64, description string, private bool) error {
_, err := s.db.Exec(`update repos set description = ?, private = ? where id = ?`, description, private, id)
return err
}
func (s *Store) DeleteRepo(id int64) error {
_, err := s.db.Exec(`delete from repos where id = ?`, id)
return err
}
func (s *Store) Profile(user int64) Profile {
var p Profile
s.db.QueryRow(`select display, bio, location, workplace, website, avatar from users where id = ?`, user).Scan(&p.Display, &p.Bio, &p.Location, &p.Workplace, &p.Website, &p.Avatar)
return p
}
func (s *Store) UpdateProfile(user int64, p Profile) error {
if p.Website != "" && !strings.HasPrefix(p.Website, "https://") && !strings.HasPrefix(p.Website, "http://") {
p.Website = "https://" + p.Website
}
_, err := s.db.Exec(`update users set display = ?, bio = ?, location = ?, workplace = ?, website = ? where id = ?`, p.Display, p.Bio, p.Location, p.Workplace, p.Website, user)
return err
}
func (s *Store) SetAvatar(user int64, version int64) error {
_, err := s.db.Exec(`update users set avatar = ? where id = ?`, version, user)
return err
}
func (s *Store) CreateInvite() (string, error) {
code := random(12)
_, err := s.db.Exec(`insert into invites(code) values (?)`, code)
return code, err
}
func (s *Store) UseInvite(code string) bool {
res, err := s.db.Exec(`update invites set used = 1 where code = ? and used = 0`, code)
if err != nil {
return false
}
n, _ := res.RowsAffected()
return n == 1
}
func (s *Store) Stats() (users, repos int) {
s.db.QueryRow(`select count(*) from users`).Scan(&users)
s.db.QueryRow(`select count(*) from repos where private = 0`).Scan(&repos)
return
}
func (r Repo) Path() string {
return fmt.Sprintf("~%s/%s", r.Owner.Name, r.Name)
}
|