1106 lines
25 KiB
Go
1106 lines
25 KiB
Go
package chat
|
|
|
|
import (
|
|
"crypto/ecdsa"
|
|
"database/sql"
|
|
"fmt"
|
|
"os"
|
|
"strings"
|
|
|
|
"github.com/ethereum/go-ethereum/crypto"
|
|
|
|
sqlite "github.com/mutecomm/go-sqlcipher" // We require go sqlcipher that overrides default implementation
|
|
dr "github.com/status-im/doubleratchet"
|
|
"github.com/status-im/migrate/v4"
|
|
"github.com/status-im/migrate/v4/database/sqlcipher"
|
|
"github.com/status-im/migrate/v4/source/go_bindata"
|
|
ecrypto "github.com/status-im/status-go/services/shhext/chat/crypto"
|
|
"github.com/status-im/status-go/services/shhext/chat/migrations"
|
|
)
|
|
|
|
// A safe max number of rows
|
|
const maxNumberOfRows = 100000000
|
|
|
|
// The default number of kdf iterations in sqlcipher (from version 3.0.0)
|
|
// https://github.com/sqlcipher/sqlcipher/blob/fda4c68bb474da7e955be07a2b807bda1bb19bd2/CHANGELOG.md#300---2013-11-05
|
|
// https://www.zetetic.net/sqlcipher/sqlcipher-api/#kdf_iter
|
|
const defaultKdfIterationsNumber = 64000
|
|
|
|
// The reduced number of kdf iterations (for performance reasons) which is
|
|
// currently used for derivation of the database key
|
|
// https://github.com/status-im/status-go/pull/1343
|
|
// https://notes.status.im/i8Y_l7ccTiOYq09HVgoFwA
|
|
const kdfIterationsNumber = 3200
|
|
|
|
const exportDB = "SELECT sqlcipher_export('newdb')"
|
|
|
|
// SQLLitePersistence represents a persistence service tied to an SQLite database
|
|
type SQLLitePersistence struct {
|
|
db *sql.DB
|
|
keysStorage dr.KeysStorage
|
|
sessionStorage dr.SessionStorage
|
|
}
|
|
|
|
// SQLLiteKeysStorage represents a keys persistence service tied to an SQLite database
|
|
type SQLLiteKeysStorage struct {
|
|
db *sql.DB
|
|
}
|
|
|
|
// SQLLiteSessionStorage represents a session persistence service tied to an SQLite database
|
|
type SQLLiteSessionStorage struct {
|
|
db *sql.DB
|
|
}
|
|
|
|
// NewSQLLitePersistence creates a new SQLLitePersistence instance, given a path and a key
|
|
func NewSQLLitePersistence(path string, key string) (*SQLLitePersistence, error) {
|
|
s := &SQLLitePersistence{}
|
|
|
|
if err := s.Open(path, key); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
s.keysStorage = NewSQLLiteKeysStorage(s.db)
|
|
|
|
s.sessionStorage = NewSQLLiteSessionStorage(s.db)
|
|
|
|
return s, nil
|
|
}
|
|
|
|
func MigrateDBFile(oldPath string, newPath string, oldKey string, newKey string) error {
|
|
_, err := os.Stat(oldPath)
|
|
|
|
// No files, nothing to do
|
|
if os.IsNotExist(err) {
|
|
return nil
|
|
}
|
|
|
|
// Any other error, throws
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if err := os.Rename(oldPath, newPath); err != nil {
|
|
return err
|
|
}
|
|
|
|
db, err := openDB(newPath, oldKey, defaultKdfIterationsNumber)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
keyString := fmt.Sprintf("PRAGMA rekey = '%s'", newKey)
|
|
|
|
if _, err = db.Exec(keyString); err != nil {
|
|
return err
|
|
}
|
|
|
|
return nil
|
|
|
|
}
|
|
|
|
// MigrateDBKeyKdfIterations changes the number of kdf iterations executed
|
|
// during the database key derivation. This change is necessary because
|
|
// of performance reasons.
|
|
// https://github.com/status-im/status-go/pull/1343
|
|
// `sqlcipher_export` is used for migration, check out this link for details:
|
|
// https://www.zetetic.net/sqlcipher/sqlcipher-api/#sqlcipher_export
|
|
func MigrateDBKeyKdfIterations(oldPath string, newPath string, key string) error {
|
|
_, err := os.Stat(oldPath)
|
|
|
|
// No files, nothing to do
|
|
if os.IsNotExist(err) {
|
|
return nil
|
|
}
|
|
|
|
// Any other error, throws
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
isEncrypted, err := sqlite.IsEncrypted(oldPath)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
// Nothing to do, move db to the next migration
|
|
if !isEncrypted {
|
|
return os.Rename(oldPath, newPath)
|
|
}
|
|
|
|
db, err := openDB(oldPath, key, defaultKdfIterationsNumber)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
attach := fmt.Sprintf(
|
|
"ATTACH DATABASE '%s' AS newdb KEY '%s'",
|
|
newPath,
|
|
key)
|
|
|
|
if _, err = db.Exec(attach); err != nil {
|
|
return err
|
|
}
|
|
|
|
changeKdfIter := fmt.Sprintf(
|
|
"PRAGMA newdb.kdf_iter = %d",
|
|
kdfIterationsNumber)
|
|
|
|
if _, err = db.Exec(changeKdfIter); err != nil {
|
|
return err
|
|
}
|
|
|
|
if _, err = db.Exec(exportDB); err != nil {
|
|
return err
|
|
}
|
|
|
|
if err = db.Close(); err != nil {
|
|
return err
|
|
}
|
|
|
|
return os.Remove(oldPath)
|
|
}
|
|
|
|
// EncryptDatabase encrypts an unencrypted database with key
|
|
func EncryptDatabase(oldPath string, newPath string, key string) error {
|
|
_, err := os.Stat(oldPath)
|
|
|
|
// No files, nothing to do
|
|
if os.IsNotExist(err) {
|
|
return nil
|
|
}
|
|
|
|
// Any other error, throws
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
isEncrypted, err := sqlite.IsEncrypted(oldPath)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
// Nothing to do, already encrypted
|
|
if isEncrypted {
|
|
return os.Rename(oldPath, newPath)
|
|
}
|
|
|
|
db, err := openDB(oldPath, "", defaultKdfIterationsNumber)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
attach := fmt.Sprintf(
|
|
"ATTACH DATABASE '%s' AS newdb KEY '%s'",
|
|
newPath,
|
|
key)
|
|
|
|
if _, err = db.Exec(attach); err != nil {
|
|
return err
|
|
}
|
|
|
|
changeKdfIter := fmt.Sprintf(
|
|
"PRAGMA newdb.kdf_iter = %d",
|
|
kdfIterationsNumber)
|
|
|
|
if _, err = db.Exec(changeKdfIter); err != nil {
|
|
return err
|
|
}
|
|
|
|
if _, err = db.Exec(exportDB); err != nil {
|
|
return err
|
|
}
|
|
|
|
if err = db.Close(); err != nil {
|
|
return err
|
|
}
|
|
|
|
return os.Remove(oldPath)
|
|
}
|
|
|
|
func openDB(path string, key string, kdfIter int) (*sql.DB, error) {
|
|
db, err := sql.Open("sqlite3", path)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
keyString := fmt.Sprintf("PRAGMA key = '%s'", key)
|
|
|
|
// Disable concurrent access as not supported by the driver
|
|
db.SetMaxOpenConns(1)
|
|
|
|
if _, err = db.Exec("PRAGMA foreign_keys=ON"); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
if _, err = db.Exec(keyString); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
kdfString := fmt.Sprintf("PRAGMA kdf_iter = '%d'", kdfIter)
|
|
|
|
if _, err = db.Exec(kdfString); err != nil {
|
|
return nil, err
|
|
}
|
|
return db, nil
|
|
}
|
|
|
|
// NewSQLLiteKeysStorage creates a new SQLLiteKeysStorage instance associated with the specified database
|
|
func NewSQLLiteKeysStorage(db *sql.DB) *SQLLiteKeysStorage {
|
|
return &SQLLiteKeysStorage{
|
|
db: db,
|
|
}
|
|
}
|
|
|
|
// NewSQLLiteSessionStorage creates a new SQLLiteSessionStorage instance associated with the specified database
|
|
func NewSQLLiteSessionStorage(db *sql.DB) *SQLLiteSessionStorage {
|
|
return &SQLLiteSessionStorage{
|
|
db: db,
|
|
}
|
|
}
|
|
|
|
// GetKeysStorage returns the associated double ratchet KeysStorage object
|
|
func (s *SQLLitePersistence) GetKeysStorage() dr.KeysStorage {
|
|
return s.keysStorage
|
|
}
|
|
|
|
// GetSessionStorage returns the associated double ratchet SessionStorage object
|
|
func (s *SQLLitePersistence) GetSessionStorage() dr.SessionStorage {
|
|
return s.sessionStorage
|
|
}
|
|
|
|
// Open opens a file at the specified path
|
|
func (s *SQLLitePersistence) Open(path string, key string) error {
|
|
db, err := openDB(path, key, kdfIterationsNumber)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
s.db = db
|
|
|
|
return s.setup()
|
|
}
|
|
|
|
// AddPrivateBundle adds the specified BundleContainer to the database
|
|
func (s *SQLLitePersistence) AddPrivateBundle(bc *BundleContainer) error {
|
|
tx, err := s.db.Begin()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
for installationID, signedPreKey := range bc.GetBundle().GetSignedPreKeys() {
|
|
var version uint32
|
|
stmt, err := tx.Prepare(`SELECT version
|
|
FROM bundles
|
|
WHERE installation_id = ? AND identity = ?
|
|
ORDER BY version DESC
|
|
LIMIT 1`)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
defer stmt.Close()
|
|
|
|
err = stmt.QueryRow(installationID, bc.GetBundle().GetIdentity()).Scan(&version)
|
|
if err != nil && err != sql.ErrNoRows {
|
|
return err
|
|
}
|
|
|
|
stmt, err = tx.Prepare(`INSERT INTO bundles(identity, private_key, signed_pre_key, installation_id, version, timestamp)
|
|
VALUES(?, ?, ?, ?, ?, ?)`)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer stmt.Close()
|
|
|
|
_, err = stmt.Exec(
|
|
bc.GetBundle().GetIdentity(),
|
|
bc.GetPrivateSignedPreKey(),
|
|
signedPreKey.GetSignedPreKey(),
|
|
installationID,
|
|
version+1,
|
|
bc.GetBundle().GetTimestamp(),
|
|
)
|
|
if err != nil {
|
|
_ = tx.Rollback()
|
|
return err
|
|
}
|
|
}
|
|
|
|
if err := tx.Commit(); err != nil {
|
|
_ = tx.Rollback()
|
|
return err
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// AddPublicBundle adds the specified Bundle to the database
|
|
func (s *SQLLitePersistence) AddPublicBundle(b *Bundle) error {
|
|
tx, err := s.db.Begin()
|
|
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
for installationID, signedPreKeyContainer := range b.GetSignedPreKeys() {
|
|
signedPreKey := signedPreKeyContainer.GetSignedPreKey()
|
|
version := signedPreKeyContainer.GetVersion()
|
|
insertStmt, err := tx.Prepare(`INSERT INTO bundles(identity, signed_pre_key, installation_id, version, timestamp)
|
|
VALUES( ?, ?, ?, ?, ?)`)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer insertStmt.Close()
|
|
|
|
_, err = insertStmt.Exec(
|
|
b.GetIdentity(),
|
|
signedPreKey,
|
|
installationID,
|
|
version,
|
|
b.GetTimestamp(),
|
|
)
|
|
if err != nil {
|
|
_ = tx.Rollback()
|
|
return err
|
|
}
|
|
// Mark old bundles as expired
|
|
updateStmt, err := tx.Prepare(`UPDATE bundles
|
|
SET expired = 1
|
|
WHERE identity = ? AND installation_id = ? AND version < ?`)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer updateStmt.Close()
|
|
|
|
_, err = updateStmt.Exec(
|
|
b.GetIdentity(),
|
|
installationID,
|
|
version,
|
|
)
|
|
if err != nil {
|
|
_ = tx.Rollback()
|
|
return err
|
|
}
|
|
|
|
}
|
|
|
|
return tx.Commit()
|
|
}
|
|
|
|
// GetAnyPrivateBundle retrieves any bundle from the database containing a private key
|
|
func (s *SQLLitePersistence) GetAnyPrivateBundle(myIdentityKey []byte, installationIDs []string) (*BundleContainer, error) {
|
|
|
|
/* #nosec */
|
|
statement := `SELECT identity, private_key, signed_pre_key, installation_id, timestamp, version
|
|
FROM bundles
|
|
WHERE expired = 0 AND identity = ? AND installation_id IN (?` + strings.Repeat(",?", len(installationIDs)-1) + ")"
|
|
stmt, err := s.db.Prepare(statement)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
defer stmt.Close()
|
|
|
|
var timestamp int64
|
|
var identity []byte
|
|
var privateKey []byte
|
|
var version uint32
|
|
|
|
args := make([]interface{}, len(installationIDs)+1)
|
|
args[0] = myIdentityKey
|
|
for i, installationID := range installationIDs {
|
|
args[i+1] = installationID
|
|
}
|
|
|
|
rows, err := stmt.Query(args...)
|
|
rowCount := 0
|
|
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
defer rows.Close()
|
|
|
|
bundle := &Bundle{
|
|
SignedPreKeys: make(map[string]*SignedPreKey),
|
|
}
|
|
|
|
bundleContainer := &BundleContainer{
|
|
Bundle: bundle,
|
|
}
|
|
|
|
for rows.Next() {
|
|
var signedPreKey []byte
|
|
var installationID string
|
|
rowCount++
|
|
err = rows.Scan(
|
|
&identity,
|
|
&privateKey,
|
|
&signedPreKey,
|
|
&installationID,
|
|
×tamp,
|
|
&version,
|
|
)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
// If there is a private key, we set the timestamp of the bundle container
|
|
if privateKey != nil {
|
|
bundle.Timestamp = timestamp
|
|
}
|
|
|
|
bundle.SignedPreKeys[installationID] = &SignedPreKey{SignedPreKey: signedPreKey, Version: version}
|
|
bundle.Identity = identity
|
|
}
|
|
|
|
// If no records are found or no record with private key, return nil
|
|
if rowCount == 0 || bundleContainer.GetBundle().Timestamp == 0 {
|
|
return nil, nil
|
|
}
|
|
|
|
return bundleContainer, nil
|
|
|
|
}
|
|
|
|
// GetPrivateKeyBundle retrieves a private key for a bundle from the database
|
|
func (s *SQLLitePersistence) GetPrivateKeyBundle(bundleID []byte) ([]byte, error) {
|
|
stmt, err := s.db.Prepare(`SELECT private_key
|
|
FROM bundles
|
|
WHERE signed_pre_key = ? LIMIT 1`)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
defer stmt.Close()
|
|
|
|
var privateKey []byte
|
|
|
|
err = stmt.QueryRow(bundleID).Scan(&privateKey)
|
|
switch err {
|
|
case sql.ErrNoRows:
|
|
return nil, nil
|
|
case nil:
|
|
return privateKey, nil
|
|
default:
|
|
return nil, err
|
|
}
|
|
}
|
|
|
|
// MarkBundleExpired expires any private bundle for a given identity
|
|
func (s *SQLLitePersistence) MarkBundleExpired(identity []byte) error {
|
|
stmt, err := s.db.Prepare(`UPDATE bundles
|
|
SET expired = 1
|
|
WHERE identity = ? AND private_key IS NOT NULL`)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer stmt.Close()
|
|
|
|
_, err = stmt.Exec(identity)
|
|
|
|
return err
|
|
}
|
|
|
|
// GetPublicBundle retrieves an existing Bundle for the specified public key from the database
|
|
func (s *SQLLitePersistence) GetPublicBundle(publicKey *ecdsa.PublicKey, installationIDs []string) (*Bundle, error) {
|
|
|
|
if len(installationIDs) == 0 {
|
|
return nil, nil
|
|
}
|
|
|
|
identity := crypto.CompressPubkey(publicKey)
|
|
|
|
/* #nosec */
|
|
statement := `SELECT signed_pre_key,installation_id, version
|
|
FROM bundles
|
|
WHERE expired = 0 AND identity = ? AND installation_id IN (?` + strings.Repeat(",?", len(installationIDs)-1) + `)
|
|
ORDER BY version DESC`
|
|
stmt, err := s.db.Prepare(statement)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
defer stmt.Close()
|
|
|
|
args := make([]interface{}, len(installationIDs)+1)
|
|
args[0] = identity
|
|
for i, installationID := range installationIDs {
|
|
args[i+1] = installationID
|
|
}
|
|
|
|
rows, err := stmt.Query(args...)
|
|
rowCount := 0
|
|
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
defer rows.Close()
|
|
|
|
bundle := &Bundle{
|
|
Identity: identity,
|
|
SignedPreKeys: make(map[string]*SignedPreKey),
|
|
}
|
|
|
|
for rows.Next() {
|
|
var signedPreKey []byte
|
|
var installationID string
|
|
var version uint32
|
|
rowCount++
|
|
err = rows.Scan(
|
|
&signedPreKey,
|
|
&installationID,
|
|
&version,
|
|
)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
bundle.SignedPreKeys[installationID] = &SignedPreKey{
|
|
SignedPreKey: signedPreKey,
|
|
Version: version,
|
|
}
|
|
|
|
}
|
|
|
|
if rowCount == 0 {
|
|
return nil, nil
|
|
}
|
|
|
|
return bundle, nil
|
|
|
|
}
|
|
|
|
// AddRatchetInfo persists the specified ratchet info into the database
|
|
func (s *SQLLitePersistence) AddRatchetInfo(key []byte, identity []byte, bundleID []byte, ephemeralKey []byte, installationID string) error {
|
|
stmt, err := s.db.Prepare(`INSERT INTO ratchet_info_v2(symmetric_key, identity, bundle_id, ephemeral_key, installation_id)
|
|
VALUES(?, ?, ?, ?, ?)`)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer stmt.Close()
|
|
|
|
_, err = stmt.Exec(
|
|
key,
|
|
identity,
|
|
bundleID,
|
|
ephemeralKey,
|
|
installationID,
|
|
)
|
|
|
|
return err
|
|
}
|
|
|
|
// GetRatchetInfo retrieves the existing RatchetInfo for a specified bundle ID and interlocutor public key from the database
|
|
func (s *SQLLitePersistence) GetRatchetInfo(bundleID []byte, theirIdentity []byte, installationID string) (*RatchetInfo, error) {
|
|
stmt, err := s.db.Prepare(`SELECT ratchet_info_v2.identity, ratchet_info_v2.symmetric_key, bundles.private_key, bundles.signed_pre_key, ratchet_info_v2.ephemeral_key, ratchet_info_v2.installation_id
|
|
FROM ratchet_info_v2 JOIN bundles ON bundle_id = signed_pre_key
|
|
WHERE ratchet_info_v2.identity = ? AND ratchet_info_v2.installation_id = ? AND bundle_id = ?
|
|
LIMIT 1`)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
defer stmt.Close()
|
|
|
|
ratchetInfo := &RatchetInfo{
|
|
BundleID: bundleID,
|
|
}
|
|
|
|
err = stmt.QueryRow(theirIdentity, installationID, bundleID).Scan(
|
|
&ratchetInfo.Identity,
|
|
&ratchetInfo.Sk,
|
|
&ratchetInfo.PrivateKey,
|
|
&ratchetInfo.PublicKey,
|
|
&ratchetInfo.EphemeralKey,
|
|
&ratchetInfo.InstallationID,
|
|
)
|
|
switch err {
|
|
case sql.ErrNoRows:
|
|
return nil, nil
|
|
case nil:
|
|
ratchetInfo.ID = append(bundleID, []byte(ratchetInfo.InstallationID)...)
|
|
return ratchetInfo, nil
|
|
default:
|
|
return nil, err
|
|
}
|
|
}
|
|
|
|
// GetAnyRatchetInfo retrieves any existing RatchetInfo for a specified interlocutor public key from the database
|
|
func (s *SQLLitePersistence) GetAnyRatchetInfo(identity []byte, installationID string) (*RatchetInfo, error) {
|
|
stmt, err := s.db.Prepare(`SELECT symmetric_key, bundles.private_key, signed_pre_key, bundle_id, ephemeral_key
|
|
FROM ratchet_info_v2 JOIN bundles ON bundle_id = signed_pre_key
|
|
WHERE expired = 0 AND ratchet_info_v2.identity = ? AND ratchet_info_v2.installation_id = ?
|
|
LIMIT 1`)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
defer stmt.Close()
|
|
|
|
ratchetInfo := &RatchetInfo{
|
|
Identity: identity,
|
|
InstallationID: installationID,
|
|
}
|
|
|
|
err = stmt.QueryRow(identity, installationID).Scan(
|
|
&ratchetInfo.Sk,
|
|
&ratchetInfo.PrivateKey,
|
|
&ratchetInfo.PublicKey,
|
|
&ratchetInfo.BundleID,
|
|
&ratchetInfo.EphemeralKey,
|
|
)
|
|
switch err {
|
|
case sql.ErrNoRows:
|
|
return nil, nil
|
|
case nil:
|
|
ratchetInfo.ID = append(ratchetInfo.BundleID, []byte(installationID)...)
|
|
return ratchetInfo, nil
|
|
default:
|
|
return nil, err
|
|
}
|
|
}
|
|
|
|
// RatchetInfoConfirmed clears the ephemeral key in the RatchetInfo
|
|
// associated with the specified bundle ID and interlocutor identity public key
|
|
func (s *SQLLitePersistence) RatchetInfoConfirmed(bundleID []byte, theirIdentity []byte, installationID string) error {
|
|
stmt, err := s.db.Prepare(`UPDATE ratchet_info_v2
|
|
SET ephemeral_key = NULL
|
|
WHERE identity = ? AND bundle_id = ? AND installation_id = ?`)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer stmt.Close()
|
|
|
|
_, err = stmt.Exec(
|
|
theirIdentity,
|
|
bundleID,
|
|
installationID,
|
|
)
|
|
|
|
return err
|
|
}
|
|
|
|
// Get retrieves the message key for a specified public key and message number
|
|
func (s *SQLLiteKeysStorage) Get(pubKey dr.Key, msgNum uint) (dr.Key, bool, error) {
|
|
var keyBytes []byte
|
|
var key [32]byte
|
|
stmt, err := s.db.Prepare(`SELECT message_key
|
|
FROM keys
|
|
WHERE public_key = ? AND msg_num = ?
|
|
LIMIT 1`)
|
|
|
|
if err != nil {
|
|
return key, false, err
|
|
}
|
|
defer stmt.Close()
|
|
|
|
err = stmt.QueryRow(pubKey[:], msgNum).Scan(&keyBytes)
|
|
switch err {
|
|
case sql.ErrNoRows:
|
|
return key, false, nil
|
|
case nil:
|
|
copy(key[:], keyBytes)
|
|
return key, true, nil
|
|
default:
|
|
return key, false, err
|
|
}
|
|
}
|
|
|
|
// Put stores a key with the specified public key, message number and message key
|
|
func (s *SQLLiteKeysStorage) Put(sessionID []byte, pubKey dr.Key, msgNum uint, mk dr.Key, seqNum uint) error {
|
|
stmt, err := s.db.Prepare(`INSERT INTO keys(session_id, public_key, msg_num, message_key, seq_num)
|
|
VALUES(?, ?, ?, ?, ?)`)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer stmt.Close()
|
|
|
|
_, err = stmt.Exec(
|
|
sessionID,
|
|
pubKey[:],
|
|
msgNum,
|
|
mk[:],
|
|
seqNum,
|
|
)
|
|
|
|
return err
|
|
}
|
|
|
|
// DeleteOldMks caps remove any key < seq_num, included
|
|
func (s *SQLLiteKeysStorage) DeleteOldMks(sessionID []byte, deleteUntil uint) error {
|
|
stmt, err := s.db.Prepare(`DELETE FROM keys
|
|
WHERE session_id = ? AND seq_num <= ?`)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer stmt.Close()
|
|
|
|
_, err = stmt.Exec(
|
|
sessionID,
|
|
deleteUntil,
|
|
)
|
|
|
|
return err
|
|
}
|
|
|
|
// TruncateMks caps the number of keys to maxKeysPerSession deleting them in FIFO fashion
|
|
func (s *SQLLiteKeysStorage) TruncateMks(sessionID []byte, maxKeysPerSession int) error {
|
|
stmt, err := s.db.Prepare(`DELETE FROM keys
|
|
WHERE rowid IN (SELECT rowid FROM keys WHERE session_id = ? ORDER BY seq_num DESC LIMIT ? OFFSET ?)`)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer stmt.Close()
|
|
|
|
_, err = stmt.Exec(
|
|
sessionID,
|
|
// We LIMIT to the max number of rows here, as OFFSET can't be used without a LIMIT
|
|
maxNumberOfRows,
|
|
maxKeysPerSession,
|
|
)
|
|
|
|
return err
|
|
}
|
|
|
|
// DeleteMk deletes the key with the specified public key and message key
|
|
func (s *SQLLiteKeysStorage) DeleteMk(pubKey dr.Key, msgNum uint) error {
|
|
stmt, err := s.db.Prepare(`DELETE FROM keys
|
|
WHERE public_key = ? AND msg_num = ?`)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer stmt.Close()
|
|
|
|
_, err = stmt.Exec(
|
|
pubKey[:],
|
|
msgNum,
|
|
)
|
|
|
|
return err
|
|
}
|
|
|
|
// Count returns the count of keys with the specified public key
|
|
func (s *SQLLiteKeysStorage) Count(pubKey dr.Key) (uint, error) {
|
|
stmt, err := s.db.Prepare(`SELECT COUNT(1)
|
|
FROM keys
|
|
WHERE public_key = ?`)
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
defer stmt.Close()
|
|
|
|
var count uint
|
|
err = stmt.QueryRow(pubKey[:]).Scan(&count)
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
|
|
return count, nil
|
|
}
|
|
|
|
// CountAll returns the count of keys with the specified public key
|
|
func (s *SQLLiteKeysStorage) CountAll() (uint, error) {
|
|
stmt, err := s.db.Prepare(`SELECT COUNT(1)
|
|
FROM keys`)
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
defer stmt.Close()
|
|
|
|
var count uint
|
|
err = stmt.QueryRow().Scan(&count)
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
|
|
return count, nil
|
|
}
|
|
|
|
// All returns nil
|
|
func (s *SQLLiteKeysStorage) All() (map[dr.Key]map[uint]dr.Key, error) {
|
|
return nil, nil
|
|
}
|
|
|
|
// Save persists the specified double ratchet state
|
|
func (s *SQLLiteSessionStorage) Save(id []byte, state *dr.State) error {
|
|
dhr := state.DHr[:]
|
|
dhs := state.DHs
|
|
dhsPublic := dhs.PublicKey()
|
|
dhsPrivate := dhs.PrivateKey()
|
|
pn := state.PN
|
|
step := state.Step
|
|
keysCount := state.KeysCount
|
|
|
|
rootChainKey := state.RootCh.CK[:]
|
|
|
|
sendChainKey := state.SendCh.CK[:]
|
|
sendChainN := state.SendCh.N
|
|
|
|
recvChainKey := state.RecvCh.CK[:]
|
|
recvChainN := state.RecvCh.N
|
|
|
|
stmt, err := s.db.Prepare(`INSERT INTO sessions(id, dhr, dhs_public, dhs_private, root_chain_key, send_chain_key, send_chain_n, recv_chain_key, recv_chain_n, pn, step, keys_count)
|
|
VALUES(?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)`)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer stmt.Close()
|
|
|
|
_, err = stmt.Exec(
|
|
id,
|
|
dhr,
|
|
dhsPublic[:],
|
|
dhsPrivate[:],
|
|
rootChainKey,
|
|
sendChainKey,
|
|
sendChainN,
|
|
recvChainKey,
|
|
recvChainN,
|
|
pn,
|
|
step,
|
|
keysCount,
|
|
)
|
|
|
|
return err
|
|
}
|
|
|
|
// Load retrieves the double ratchet state for a given ID
|
|
func (s *SQLLiteSessionStorage) Load(id []byte) (*dr.State, error) {
|
|
stmt, err := s.db.Prepare(`SELECT dhr, dhs_public, dhs_private, root_chain_key, send_chain_key, send_chain_n, recv_chain_key, recv_chain_n, pn, step, keys_count
|
|
FROM sessions
|
|
WHERE id = ?`)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
defer stmt.Close()
|
|
|
|
var (
|
|
dhr []byte
|
|
dhsPublic []byte
|
|
dhsPrivate []byte
|
|
rootChainKey []byte
|
|
sendChainKey []byte
|
|
sendChainN uint
|
|
recvChainKey []byte
|
|
recvChainN uint
|
|
pn uint
|
|
step uint
|
|
keysCount uint
|
|
)
|
|
|
|
err = stmt.QueryRow(id).Scan(
|
|
&dhr,
|
|
&dhsPublic,
|
|
&dhsPrivate,
|
|
&rootChainKey,
|
|
&sendChainKey,
|
|
&sendChainN,
|
|
&recvChainKey,
|
|
&recvChainN,
|
|
&pn,
|
|
&step,
|
|
&keysCount,
|
|
)
|
|
switch err {
|
|
case sql.ErrNoRows:
|
|
return nil, nil
|
|
case nil:
|
|
state := dr.DefaultState(toKey(rootChainKey))
|
|
|
|
state.PN = uint32(pn)
|
|
state.Step = step
|
|
state.KeysCount = keysCount
|
|
|
|
state.DHs = ecrypto.DHPair{
|
|
PrvKey: toKey(dhsPrivate),
|
|
PubKey: toKey(dhsPublic),
|
|
}
|
|
|
|
state.DHr = toKey(dhr)
|
|
|
|
state.SendCh.CK = toKey(sendChainKey)
|
|
state.SendCh.N = uint32(sendChainN)
|
|
|
|
state.RecvCh.CK = toKey(recvChainKey)
|
|
state.RecvCh.N = uint32(recvChainN)
|
|
|
|
return &state, nil
|
|
default:
|
|
return nil, err
|
|
}
|
|
}
|
|
|
|
// GetActiveInstallations returns the active installations for a given identity
|
|
func (s *SQLLitePersistence) GetActiveInstallations(maxInstallations int, identity []byte) ([]string, error) {
|
|
stmt, err := s.db.Prepare(`SELECT installation_id
|
|
FROM installations
|
|
WHERE enabled = 1 AND identity = ?
|
|
ORDER BY timestamp DESC
|
|
LIMIT ?`)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
var installations []string
|
|
rows, err := stmt.Query(identity, maxInstallations)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
for rows.Next() {
|
|
var installationID string
|
|
err = rows.Scan(
|
|
&installationID,
|
|
)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
installations = append(installations, installationID)
|
|
}
|
|
|
|
return installations, nil
|
|
|
|
}
|
|
|
|
// AddInstallations adds the installations for a given identity, maintaining the enabled flag
|
|
func (s *SQLLitePersistence) AddInstallations(identity []byte, timestamp int64, installationIDs []string, defaultEnabled bool) error {
|
|
tx, err := s.db.Begin()
|
|
if err != nil {
|
|
return nil
|
|
}
|
|
|
|
for _, installationID := range installationIDs {
|
|
stmt, err := tx.Prepare(`SELECT enabled
|
|
FROM installations
|
|
WHERE identity = ? AND installation_id = ?
|
|
LIMIT 1`)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer stmt.Close()
|
|
|
|
var oldEnabled bool
|
|
|
|
err = stmt.QueryRow(identity, installationID).Scan(&oldEnabled)
|
|
if err != nil && err != sql.ErrNoRows {
|
|
return err
|
|
}
|
|
|
|
// We update timestamp if present without changing enabled, only if this is a new bundle
|
|
if err != sql.ErrNoRows {
|
|
stmt, err = tx.Prepare(`UPDATE installations
|
|
SET timestamp = ?, enabled = ?
|
|
WHERE identity = ?
|
|
AND installation_id = ?
|
|
AND timestamp < ?`)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
_, err = stmt.Exec(
|
|
timestamp,
|
|
oldEnabled,
|
|
identity,
|
|
installationID,
|
|
timestamp,
|
|
)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer stmt.Close()
|
|
|
|
} else {
|
|
stmt, err = tx.Prepare(`INSERT INTO installations(identity, installation_id, timestamp, enabled)
|
|
VALUES (?, ?, ?, ?)`)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
_, err = stmt.Exec(
|
|
identity,
|
|
installationID,
|
|
timestamp,
|
|
defaultEnabled,
|
|
)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer stmt.Close()
|
|
}
|
|
|
|
}
|
|
|
|
if err := tx.Commit(); err != nil {
|
|
_ = tx.Rollback()
|
|
return err
|
|
}
|
|
|
|
return nil
|
|
|
|
}
|
|
|
|
// EnableInstallation enables the installation
|
|
func (s *SQLLitePersistence) EnableInstallation(identity []byte, installationID string) error {
|
|
stmt, err := s.db.Prepare(`UPDATE installations
|
|
SET enabled = 1
|
|
WHERE identity = ? AND installation_id = ?`)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
_, err = stmt.Exec(identity, installationID)
|
|
return err
|
|
|
|
}
|
|
|
|
// DisableInstallation disable the installation
|
|
func (s *SQLLitePersistence) DisableInstallation(identity []byte, installationID string) error {
|
|
|
|
stmt, err := s.db.Prepare(`UPDATE installations
|
|
SET enabled = 0
|
|
WHERE identity = ? AND installation_id = ?`)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
_, err = stmt.Exec(identity, installationID)
|
|
return err
|
|
}
|
|
|
|
func toKey(a []byte) dr.Key {
|
|
var k [32]byte
|
|
copy(k[:], a)
|
|
return k
|
|
}
|
|
|
|
func (s *SQLLitePersistence) setup() error {
|
|
resources := bindata.Resource(
|
|
migrations.AssetNames(),
|
|
func(name string) ([]byte, error) {
|
|
return migrations.Asset(name)
|
|
},
|
|
)
|
|
|
|
source, err := bindata.WithInstance(resources)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
driver, err := sqlcipher.WithInstance(s.db, &sqlcipher.Config{})
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
m, err := migrate.NewWithInstance(
|
|
"go-bindata",
|
|
source,
|
|
"sqlcipher",
|
|
driver)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if err = m.Up(); err != migrate.ErrNoChange {
|
|
return err
|
|
}
|
|
|
|
return nil
|
|
}
|