553 lines
16 KiB
Go
553 lines
16 KiB
Go
package store
|
|
|
|
// TODO - DeviceId - What about clients that lie about deviceId? Maybe require a certain format to make sure it gives a real value? Something it wouldn't come up with by accident.
|
|
|
|
import (
|
|
"database/sql"
|
|
"errors"
|
|
"fmt"
|
|
"log"
|
|
"time"
|
|
|
|
"github.com/mattn/go-sqlite3"
|
|
|
|
"lbryio/lbry-id/auth"
|
|
"lbryio/lbry-id/wallet"
|
|
)
|
|
|
|
var (
|
|
ErrDuplicateToken = fmt.Errorf("Token already exists for this user and device")
|
|
ErrNoToken = fmt.Errorf("Token does not exist for this user and device")
|
|
|
|
ErrDuplicateWallet = fmt.Errorf("Wallet already exists for this user")
|
|
|
|
ErrNoWallet = fmt.Errorf("Wallet does not exist for this user")
|
|
|
|
ErrUnexpectedWallet = fmt.Errorf("Wallet unexpectedly exist for this user")
|
|
ErrWrongSequence = fmt.Errorf("Wallet could not be updated to this sequence")
|
|
|
|
ErrDuplicateEmail = fmt.Errorf("Email already exists for this user")
|
|
ErrDuplicateAccount = fmt.Errorf("User already has an account")
|
|
|
|
ErrWrongCredentials = fmt.Errorf("No match for email and password")
|
|
)
|
|
|
|
// For test stubs
|
|
type StoreInterface interface {
|
|
SaveToken(*auth.AuthToken) error
|
|
GetToken(auth.TokenString) (*auth.AuthToken, error)
|
|
SetWallet(auth.UserId, wallet.EncryptedWallet, wallet.Sequence, wallet.WalletHmac) error
|
|
GetWallet(auth.UserId) (wallet.EncryptedWallet, wallet.Sequence, wallet.WalletHmac, error)
|
|
GetUserId(auth.Email, auth.Password) (auth.UserId, error)
|
|
CreateAccount(auth.Email, auth.Password, auth.ClientSaltSeed) error
|
|
ChangePasswordWithWallet(auth.Email, auth.Password, auth.Password, auth.ClientSaltSeed, wallet.EncryptedWallet, wallet.Sequence, wallet.WalletHmac) error
|
|
ChangePasswordNoWallet(auth.Email, auth.Password, auth.Password, auth.ClientSaltSeed) error
|
|
GetClientSaltSeed(auth.Email) (auth.ClientSaltSeed, error)
|
|
}
|
|
|
|
type Store struct {
|
|
db *sql.DB
|
|
}
|
|
|
|
func (s *Store) Init(fileName string) {
|
|
db, err := sql.Open("sqlite3", "file:"+fileName+"?_foreign_keys=on")
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
s.db = db
|
|
}
|
|
|
|
func (s *Store) Migrate() error {
|
|
// We use the `sequence` field for transaction safety. For instance, let's
|
|
// say two different clients are trying to update the sequence from 5 to 6.
|
|
// The update command will specify "WHERE sequence=5". Only one of these
|
|
// commands will succeed, and the other will get back an error.
|
|
|
|
// We use AUTOINCREMENT against the protestations of people on the Internet
|
|
// who claim that INTEGER PRIMARY KEY automatically has autoincrment, and
|
|
// that using it when it's not "strictly needed" uses extra resources. But
|
|
// without AUTOINCREMENT, it might reuse primary keys if a row is deleted and
|
|
// re-added. Who wants that risk? Besides, we'll switch to Postgres when it's
|
|
// time to scale anyway.
|
|
|
|
// We use UNIQUE on auth_tokens.token so that we can retrieve it easily and
|
|
// identify the user (and I suppose the uniqueness provides a little extra
|
|
// security in case we screw up the random generator). However the primary
|
|
// key should still be (user_id, device_id) so that a device's row can be
|
|
// updated with a new token.
|
|
query := `
|
|
CREATE TABLE IF NOT EXISTS auth_tokens(
|
|
token TEXT NOT NULL UNIQUE,
|
|
user_id INTEGER NOT NULL,
|
|
device_id TEXT NOT NULL,
|
|
scope TEXT NOT NULL,
|
|
expiration DATETIME NOT NULL,
|
|
CHECK (
|
|
-- should eventually fail for foreign key constraint instead
|
|
device_id <> '' AND
|
|
|
|
token <> '' AND
|
|
scope <> '' AND
|
|
|
|
-- Don't know when it uses either format to denote UTC
|
|
expiration <> "0001-01-01 00:00:00+00:00" AND
|
|
expiration <> "0001-01-01 00:00:00Z"
|
|
|
|
),
|
|
PRIMARY KEY (user_id, device_id)
|
|
FOREIGN KEY (user_id) REFERENCES accounts(user_id)
|
|
);
|
|
CREATE TABLE IF NOT EXISTS wallets(
|
|
user_id INTEGER NOT NULL,
|
|
encrypted_wallet TEXT NOT NULL,
|
|
sequence INTEGER NOT NULL,
|
|
hmac TEXT NOT NULL,
|
|
PRIMARY KEY (user_id)
|
|
FOREIGN KEY (user_id) REFERENCES accounts(user_id)
|
|
CHECK (
|
|
encrypted_wallet <> '' AND
|
|
hmac <> '' AND
|
|
sequence <> 0
|
|
)
|
|
);
|
|
CREATE TABLE IF NOT EXISTS accounts(
|
|
email TEXT NOT NULL UNIQUE,
|
|
key TEXT NOT NULL,
|
|
client_salt_seed TEXT NOT NULL,
|
|
server_salt TEXT NOT NULL,
|
|
user_id INTEGER PRIMARY KEY AUTOINCREMENT,
|
|
CHECK (
|
|
email <> '' AND
|
|
key <> '' AND
|
|
client_salt_seed <> '' AND
|
|
server_salt <> ''
|
|
)
|
|
);
|
|
`
|
|
|
|
_, err := s.db.Exec(query)
|
|
return err
|
|
}
|
|
|
|
////////////////
|
|
// Auth Token //
|
|
////////////////
|
|
|
|
// TODO - Is it safe to assume that the owner of the token is legit, and is
|
|
// coming from the legit device id? No need to query by userId and deviceId
|
|
// (which I did previously)?
|
|
//
|
|
// TODO Put the timestamp in the token to avoid duplicates over time. And/or just use a library! Someone solved this already.
|
|
func (s *Store) GetToken(token auth.TokenString) (authToken *auth.AuthToken, err error) {
|
|
expirationCutoff := time.Now().UTC()
|
|
|
|
authToken = &(auth.AuthToken{})
|
|
|
|
err = s.db.QueryRow(
|
|
"SELECT token, user_id, device_id, scope, expiration FROM auth_tokens WHERE token=? AND expiration>?", token, expirationCutoff,
|
|
).Scan(
|
|
&authToken.Token,
|
|
&authToken.UserId,
|
|
&authToken.DeviceId,
|
|
&authToken.Scope,
|
|
&authToken.Expiration,
|
|
)
|
|
if err == sql.ErrNoRows {
|
|
err = ErrNoToken
|
|
}
|
|
if err != nil {
|
|
authToken = nil
|
|
}
|
|
return
|
|
}
|
|
|
|
func (s *Store) insertToken(authToken *auth.AuthToken, expiration time.Time) (err error) {
|
|
_, err = s.db.Exec(
|
|
"INSERT INTO auth_tokens (token, user_id, device_id, scope, expiration) VALUES(?,?,?,?,?)",
|
|
authToken.Token, authToken.UserId, authToken.DeviceId, authToken.Scope, expiration,
|
|
)
|
|
|
|
var sqliteErr sqlite3.Error
|
|
if errors.As(err, &sqliteErr) {
|
|
// I initially expected to need to check for ErrConstraintUnique.
|
|
// Maybe for psql it will be?
|
|
if errors.Is(sqliteErr.ExtendedCode, sqlite3.ErrConstraintPrimaryKey) {
|
|
err = ErrDuplicateToken
|
|
}
|
|
}
|
|
|
|
return
|
|
}
|
|
|
|
func (s *Store) updateToken(authToken *auth.AuthToken, experation time.Time) (err error) {
|
|
res, err := s.db.Exec(
|
|
"UPDATE auth_tokens SET token=?, expiration=?, scope=? WHERE user_id=? AND device_id=?",
|
|
authToken.Token, experation, authToken.Scope, authToken.UserId, authToken.DeviceId,
|
|
)
|
|
if err != nil {
|
|
return
|
|
}
|
|
|
|
numRows, err := res.RowsAffected()
|
|
if err != nil {
|
|
return
|
|
}
|
|
if numRows == 0 {
|
|
err = ErrNoToken
|
|
}
|
|
return
|
|
}
|
|
|
|
func (s *Store) SaveToken(token *auth.AuthToken) (err error) {
|
|
// TODO: For psql, do upsert here instead of separate insertToken and updateToken functions
|
|
// Actually it may even be available for SQLite?
|
|
|
|
// TODO - Should we auto-delete expired tokens?
|
|
|
|
expiration := time.Now().UTC().Add(time.Hour * 24 * 14)
|
|
|
|
// This is most likely not the first time calling this function for this
|
|
// device, so there's probably already a token in there.
|
|
err = s.updateToken(token, expiration)
|
|
|
|
if err == ErrNoToken {
|
|
// If we don't have a token already saved, insert a new one:
|
|
err = s.insertToken(token, expiration)
|
|
|
|
if err == ErrDuplicateToken {
|
|
// By unlikely coincidence, a token was created between trying `updateToken`
|
|
// and trying `insertToken`. At this point we can safely `updateToken`.
|
|
// TODO - reconsider this - if one client has two concurrent requests
|
|
// that create this situation, maybe the second one should just fail?
|
|
err = s.updateToken(token, expiration)
|
|
}
|
|
}
|
|
if err == nil {
|
|
token.Expiration = &expiration
|
|
}
|
|
return
|
|
}
|
|
|
|
////////////
|
|
// Wallet //
|
|
////////////
|
|
|
|
func (s *Store) GetWallet(userId auth.UserId) (encryptedWallet wallet.EncryptedWallet, sequence wallet.Sequence, hmac wallet.WalletHmac, err error) {
|
|
err = s.db.QueryRow(
|
|
"SELECT encrypted_wallet, sequence, hmac FROM wallets WHERE user_id=?",
|
|
userId,
|
|
).Scan(
|
|
&encryptedWallet,
|
|
&sequence,
|
|
&hmac,
|
|
)
|
|
if err == sql.ErrNoRows {
|
|
err = ErrNoWallet
|
|
}
|
|
return
|
|
}
|
|
|
|
func (s *Store) insertFirstWallet(
|
|
userId auth.UserId,
|
|
encryptedWallet wallet.EncryptedWallet,
|
|
hmac wallet.WalletHmac,
|
|
) (err error) {
|
|
// This will only be used to attempt to insert the first wallet (sequence=1).
|
|
// The database will enforce that this will not be set if this user already
|
|
// has a wallet.
|
|
_, err = s.db.Exec(
|
|
"INSERT INTO wallets (user_id, encrypted_wallet, sequence, hmac) VALUES(?,?,?,?)",
|
|
userId, encryptedWallet, 1, hmac,
|
|
)
|
|
|
|
var sqliteErr sqlite3.Error
|
|
if errors.As(err, &sqliteErr) {
|
|
// I initially expected to need to check for ErrConstraintUnique.
|
|
// Maybe for psql it will be?
|
|
if errors.Is(sqliteErr.ExtendedCode, sqlite3.ErrConstraintPrimaryKey) {
|
|
// NOTE While ErrDuplicateWallet makes sense in the context of trying to insert,
|
|
// SetWallet, which also handles update, translates this to ErrWrongSequence
|
|
err = ErrDuplicateWallet
|
|
}
|
|
}
|
|
|
|
return
|
|
}
|
|
|
|
func (s *Store) updateWalletToSequence(
|
|
userId auth.UserId,
|
|
encryptedWallet wallet.EncryptedWallet,
|
|
sequence wallet.Sequence,
|
|
hmac wallet.WalletHmac,
|
|
) (err error) {
|
|
// This will be used for wallets with sequence > 1.
|
|
// Use the database to enforce that we only update if we are incrementing the sequence.
|
|
// This way, if two clients attempt to update at the same time, it will return
|
|
// an error for the second one.
|
|
res, err := s.db.Exec(
|
|
"UPDATE wallets SET encrypted_wallet=?, sequence=?, hmac=? WHERE user_id=? AND sequence=?",
|
|
encryptedWallet, sequence, hmac, userId, sequence-1,
|
|
)
|
|
if err != nil {
|
|
return
|
|
}
|
|
|
|
numRows, err := res.RowsAffected()
|
|
if err != nil {
|
|
return
|
|
}
|
|
if numRows == 0 {
|
|
// NOTE While ErrNoWallet makes sense in the context of trying to update,
|
|
// SetWallet, which also handles insert, translates this to ErrWrongSequence
|
|
err = ErrNoWallet
|
|
}
|
|
return
|
|
}
|
|
|
|
// Assumption: Sequence has been validated (>=1)
|
|
func (s *Store) SetWallet(userId auth.UserId, encryptedWallet wallet.EncryptedWallet, sequence wallet.Sequence, hmac wallet.WalletHmac) (err error) {
|
|
if sequence == 1 {
|
|
// If sequence == 1, the client assumed that this is our first
|
|
// wallet. Try to insert. If we get a conflict, the client
|
|
// assumed incorrectly and we proceed below to return the latest
|
|
// wallet from the db.
|
|
err = s.insertFirstWallet(userId, encryptedWallet, hmac)
|
|
if err == ErrDuplicateWallet {
|
|
// A wallet already exists. That means the input sequence should not be 1.
|
|
// To the caller, this means the sequence was wrong.
|
|
err = ErrWrongSequence
|
|
}
|
|
} else {
|
|
// If sequence > 1, the client assumed that it is replacing wallet
|
|
// with sequence - 1. Explicitly try to update the wallet with
|
|
// sequence - 1. If we updated no rows, the client assumed incorrectly
|
|
// and we proceed below to return the latest wallet from the db.
|
|
err = s.updateWalletToSequence(userId, encryptedWallet, sequence, hmac)
|
|
if err == ErrNoWallet {
|
|
// No wallet found to replace at the `sequence - 1`. To the caller, this
|
|
// means the sequence they put in was wrong.
|
|
err = ErrWrongSequence
|
|
}
|
|
}
|
|
return
|
|
}
|
|
|
|
func (s *Store) GetUserId(email auth.Email, password auth.Password) (userId auth.UserId, err error) {
|
|
var key auth.KDFKey
|
|
var salt auth.ServerSalt
|
|
err = s.db.QueryRow(
|
|
`SELECT user_id, key, server_salt from accounts WHERE email=?`,
|
|
email,
|
|
).Scan(&userId, &key, &salt)
|
|
if err == sql.ErrNoRows {
|
|
err = ErrWrongCredentials
|
|
}
|
|
if err != nil {
|
|
return
|
|
}
|
|
match, err := password.Check(key, salt)
|
|
if err == nil && !match {
|
|
err = ErrWrongCredentials
|
|
userId = auth.UserId(0)
|
|
}
|
|
return
|
|
}
|
|
|
|
/////////////
|
|
// Account //
|
|
/////////////
|
|
|
|
func (s *Store) CreateAccount(email auth.Email, password auth.Password, seed auth.ClientSaltSeed) (err error) {
|
|
key, salt, err := password.Create()
|
|
if err != nil {
|
|
return
|
|
}
|
|
// userId auto-increments
|
|
_, err = s.db.Exec(
|
|
"INSERT INTO accounts (email, key, server_salt, client_salt_seed) VALUES(?,?,?,?)",
|
|
email, key, salt, seed,
|
|
)
|
|
var sqliteErr sqlite3.Error
|
|
if errors.As(err, &sqliteErr) {
|
|
if errors.Is(sqliteErr.ExtendedCode, sqlite3.ErrConstraintUnique) {
|
|
err = ErrDuplicateAccount
|
|
}
|
|
}
|
|
|
|
return
|
|
}
|
|
|
|
// Change password. For the user, this requires changing their root password,
|
|
// which changes the encryption key for the wallet as well. Thus, we should
|
|
// update the wallet at the same time to avoid ever having a situation where
|
|
// these two don't match.
|
|
//
|
|
// Also delete all auth tokens to force clients to update their root password
|
|
// to get a new token. This prevents other clients from posting a wallet
|
|
// encrypted with the old key.
|
|
func (s *Store) ChangePasswordWithWallet(
|
|
email auth.Email,
|
|
oldPassword auth.Password,
|
|
newPassword auth.Password,
|
|
clientSaltSeed auth.ClientSaltSeed,
|
|
encryptedWallet wallet.EncryptedWallet,
|
|
sequence wallet.Sequence,
|
|
hmac wallet.WalletHmac,
|
|
) (err error) {
|
|
return s.changePassword(
|
|
email,
|
|
oldPassword,
|
|
newPassword,
|
|
clientSaltSeed,
|
|
encryptedWallet,
|
|
sequence,
|
|
hmac,
|
|
)
|
|
}
|
|
|
|
// Change password, but with no wallet currently saved. Since there's no
|
|
// wallet saved, there's no wallet to update. The encryption key is moot.
|
|
//
|
|
// Also delete all auth tokens to force clients to update their root password
|
|
// to get a new token. This prevents other clients from posting a wallet
|
|
// encrypted with the old key.
|
|
func (s *Store) ChangePasswordNoWallet(
|
|
email auth.Email,
|
|
oldPassword auth.Password,
|
|
newPassword auth.Password,
|
|
clientSaltSeed auth.ClientSaltSeed,
|
|
) (err error) {
|
|
return s.changePassword(
|
|
email,
|
|
oldPassword,
|
|
newPassword,
|
|
clientSaltSeed,
|
|
wallet.EncryptedWallet(""),
|
|
wallet.Sequence(0),
|
|
wallet.WalletHmac(""),
|
|
)
|
|
}
|
|
|
|
// Common code for for WithWallet and WithNoWallet password change functions
|
|
func (s *Store) changePassword(
|
|
email auth.Email,
|
|
oldPassword auth.Password,
|
|
newPassword auth.Password,
|
|
clientSaltSeed auth.ClientSaltSeed,
|
|
encryptedWallet wallet.EncryptedWallet,
|
|
sequence wallet.Sequence,
|
|
hmac wallet.WalletHmac,
|
|
) (err error) {
|
|
var userId auth.UserId
|
|
|
|
tx, err := s.db.Begin()
|
|
if err != nil {
|
|
return
|
|
}
|
|
|
|
// Lots of error conditions. Just defer this. However, we need to make sure to
|
|
// make sure the variable `err` is set to the error before we return, instead
|
|
// of doing `return <error>`.
|
|
endTxn := func() {
|
|
if err != nil {
|
|
tx.Rollback()
|
|
} else {
|
|
tx.Commit()
|
|
}
|
|
}
|
|
defer endTxn()
|
|
|
|
var oldKey auth.KDFKey
|
|
var oldSalt auth.ServerSalt
|
|
|
|
err = tx.QueryRow(
|
|
`SELECT user_id, key, server_salt from accounts WHERE email=?`,
|
|
email,
|
|
).Scan(&userId, &oldKey, &oldSalt)
|
|
if err == sql.ErrNoRows {
|
|
err = ErrWrongCredentials
|
|
}
|
|
if err != nil {
|
|
return
|
|
}
|
|
match, err := oldPassword.Check(oldKey, oldSalt)
|
|
if err == nil && !match {
|
|
err = ErrWrongCredentials
|
|
}
|
|
if err != nil {
|
|
return
|
|
}
|
|
|
|
newKey, newSalt, err := newPassword.Create()
|
|
if err != nil {
|
|
return
|
|
}
|
|
|
|
res, err := tx.Exec(
|
|
"UPDATE accounts SET key=?, server_salt=?, client_salt_seed=? WHERE user_id=?",
|
|
newKey, newSalt, clientSaltSeed, userId,
|
|
)
|
|
if err != nil {
|
|
return
|
|
}
|
|
numRows, err := res.RowsAffected()
|
|
if err != nil {
|
|
return
|
|
}
|
|
if numRows == 0 {
|
|
// Very unexpected error!
|
|
err = fmt.Errorf("Password failed to update")
|
|
return
|
|
}
|
|
|
|
if encryptedWallet != "" {
|
|
// With a wallet expected: update it.
|
|
|
|
res, err = tx.Exec(
|
|
`UPDATE wallets SET encrypted_wallet=?, sequence=?, hmac=?
|
|
WHERE user_id=? AND sequence=?`,
|
|
encryptedWallet, sequence, hmac, userId, sequence-1,
|
|
)
|
|
if err != nil {
|
|
return
|
|
}
|
|
numRows, err = res.RowsAffected()
|
|
if err != nil {
|
|
return
|
|
}
|
|
if numRows == 0 {
|
|
err = ErrWrongSequence
|
|
return
|
|
}
|
|
} else {
|
|
// With no wallet expected: assert we have no wallet.
|
|
|
|
var dummy string
|
|
err = tx.QueryRow("SELECT 1 FROM wallets WHERE user_id=?", userId).Scan(&dummy)
|
|
if err != sql.ErrNoRows {
|
|
if err == nil {
|
|
// We expected no rows
|
|
err = ErrUnexpectedWallet
|
|
return
|
|
}
|
|
// Some other error
|
|
return
|
|
}
|
|
}
|
|
|
|
// Don't care how many I delete here. Might even be zero. No login token while
|
|
// changing password seems plausible.
|
|
_, err = tx.Exec("DELETE FROM auth_tokens WHERE user_id=?", userId)
|
|
return
|
|
}
|
|
|
|
func (s *Store) GetClientSaltSeed(email auth.Email) (seed auth.ClientSaltSeed, err error) {
|
|
err = s.db.QueryRow(
|
|
`SELECT client_salt_seed from accounts WHERE email=?`,
|
|
email,
|
|
).Scan(&seed)
|
|
if err == sql.ErrNoRows {
|
|
err = ErrWrongCredentials
|
|
}
|
|
return
|
|
}
|