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storage.go
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storage.go
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package main
import (
"bytes"
"database/sql"
"encoding/gob"
"errors"
"fmt"
"os"
"path/filepath"
"strings"
"time"
"github.com/Cloud-Foundations/golib/pkg/awsutil/metadata"
"github.com/Cloud-Foundations/golib/pkg/awsutil/secretsmgr"
_ "github.com/lib/pq"
_ "github.com/mattn/go-sqlite3"
)
const (
userProfilePrefix = "profile_"
userProfileSuffix = ".gob"
profileDBFilename = "userProfiles.sqlite3"
cachedDBFilename = "cachedDB.sqlite3"
dbConnectionLifetimeDefault = time.Minute * 15
dbConnectionLifetimeMaximum = time.Hour
dbSyncDelayDefault = time.Second * 3
dbSyncDelayMinimum = time.Second
dbSyncDelayMaximum = time.Minute
dbSyncIntervalDefault = time.Minute * 5
dbSyncIntervalMinimum = time.Second * 5
dbSyncIntervalMaximum = time.Minute * 15
)
func (config *ProfileStorageConfig) setSyncLimits() {
if config.SyncDelay < 1 {
config.SyncDelay = dbSyncDelayDefault
} else if config.SyncDelay < dbSyncDelayMinimum {
config.SyncDelay = dbSyncDelayMinimum
} else if config.SyncDelay > dbSyncDelayMaximum {
config.SyncDelay = dbSyncDelayMaximum
}
if config.SyncInterval < 1 {
config.SyncInterval = dbSyncIntervalDefault
} else if config.SyncInterval < dbSyncIntervalMinimum {
config.SyncInterval = dbSyncIntervalMinimum
} else if config.SyncInterval > dbSyncIntervalMaximum {
config.SyncInterval = dbSyncIntervalMaximum
}
if config.ConnectionLifetime < 1 {
config.ConnectionLifetime = dbConnectionLifetimeDefault
}
if config.ConnectionLifetime < config.SyncInterval {
config.ConnectionLifetime = config.SyncInterval
} else if config.ConnectionLifetime > dbConnectionLifetimeMaximum {
config.ConnectionLifetime = dbConnectionLifetimeMaximum
}
}
func (state *RuntimeState) expandStorageUrl() error {
config := &state.Config.ProfileStorage
if config.AwsSecretId == "" {
return nil
}
metadataClient, err := metadata.GetMetadataClient()
if err != nil {
return err
}
secrets, err := secretsmgr.GetAwsSecret(metadataClient, config.AwsSecretId,
state.logger)
if err != nil {
return err
}
config.StorageUrl = os.Expand(config.StorageUrl,
func(variableName string) string {
return secrets[variableName]
})
return nil
}
func initDB(state *RuntimeState) (err error) {
logger.Debugf(3, "Top of initDB")
state.Config.ProfileStorage.setSyncLimits()
//open/create cache DB first
cacheDBFilename := filepath.Join(state.Config.Base.DataDirectory,
cachedDBFilename)
state.cacheDB, err = initFileDBSQLite(cacheDBFilename, state.cacheDB)
if err != nil {
logger.Printf("Failure on creation of cacheDB")
return err
}
logger.Debugf(3, "storage=%s", state.Config.ProfileStorage.StorageUrl)
storageURL := state.Config.ProfileStorage.StorageUrl
if storageURL == "" {
storageURL = "sqlite:"
}
splitString := strings.SplitN(storageURL, ":", 2)
if len(splitString) < 1 {
logger.Printf("invalid string")
err := errors.New("Bad storage url string")
return err
}
state.remoteDBQueryTimeout = time.Second * 2
go state.BackgroundDBCopy(state.Config.ProfileStorage.SyncDelay)
switch splitString[0] {
case "sqlite":
logger.Printf("doing sqlite")
return initDBSQlite(state)
case "postgresql":
logger.Printf("doing postgres")
return initDBPostgres(state)
default:
logger.Printf("invalid storage url string")
err := errors.New("Bad storage url string")
return err
}
}
func initDBPostgres(state *RuntimeState) (err error) {
state.dbType = "postgres"
state.db, err = sql.Open("postgres", state.Config.ProfileStorage.StorageUrl)
if err != nil {
return err
}
/// This should be changed to take care of DB schema
if true {
sqlStmt := `create table if not exists user_profile (id serial not null primary key, username text unique, profile_data bytea);`
_, err = state.db.Exec(sqlStmt)
if err != nil {
logger.Printf("init postgres err: %s: %q\n", err, sqlStmt)
return err
}
sqlStmt = `create table if not exists expiring_signed_user_data(id serial not null primary key, username text not null, jws_data text not null, type integer not null, expiration_epoch integer not null, update_epoch integer not null, UNIQUE(username,type));`
_, err = state.db.Exec(sqlStmt)
if err != nil {
logger.Printf("init postgres err: %s: %q\n", err, sqlStmt)
return err
}
}
// Ensure that broken connections are replaced.
state.db.SetConnMaxLifetime(state.Config.ProfileStorage.ConnectionLifetime)
return nil
}
// This call initializes the database if it does not exist.
func initDBSQlite(state *RuntimeState) (err error) {
state.dbType = "sqlite"
dbFilename := filepath.Join(state.Config.Base.DataDirectory,
profileDBFilename)
state.db, err = initFileDBSQLite(dbFilename, state.db)
if err != nil {
return err
}
state.db.SetMaxIdleConns(0) // Make the DB NFS-friendly.
return nil
}
var sqliteinitializationStatements = []string{
`create table if not exists user_profile (id integer not null primary key, username text unique, profile_data blob);`,
`create table if not exists expiring_signed_user_data(id integer not null primary key, username text not null, jws_data text not null, type integer not null, expiration_epoch integer not null, update_epoch integer no null, UNIQUE(username,type));`,
}
func initializeSQLitetables(db *sql.DB) error {
for _, sqlStmt := range sqliteinitializationStatements {
logger.Debugf(2, "initializing sqlite, statement =%q", sqlStmt)
_, err := db.Exec(sqlStmt)
if err != nil {
logger.Printf("%s: %q\n", err, sqlStmt)
return err
}
}
return nil
}
// This call initializes the database if it does not exist.
// TODO: update to perform auto-updates of the db.
func initFileDBSQLite(dbFilename string, currentDB *sql.DB) (*sql.DB, error) {
if _, err := os.Stat(dbFilename); os.IsNotExist(err) {
//CREATE NEW DB
fileDB, err := sql.Open("sqlite3", dbFilename)
if err != nil {
logger.Printf("Failure creating new db: %s", dbFilename)
return nil, err
}
logger.Printf("post DB open")
err = initializeSQLitetables(fileDB)
if err != nil {
return nil, err
}
return fileDB, nil
}
// try open the DB
if currentDB == nil {
fileDB, err := sql.Open("sqlite3", dbFilename)
if err != nil {
return nil, err
}
err = initializeSQLitetables(fileDB)
if err != nil {
return nil, err
}
return fileDB, nil
}
return currentDB, nil
}
func (state *RuntimeState) BackgroundDBCopy(initialSleep time.Duration) {
time.Sleep(initialSleep)
for {
logger.Debugf(0, "starting db copy")
err := copyDBIntoSQLite(state.db, state.cacheDB, "sqlite")
if err != nil {
logger.Printf("err='%s'", err)
} else {
logger.Debugf(0, "db copy success")
}
cleanupDBData(state.db)
cleanupDBData(state.cacheDB)
time.Sleep(state.Config.ProfileStorage.SyncInterval)
}
}
func cleanupDBData(db *sql.DB) error {
if db == nil {
err := errors.New("nil database on cleanup")
return err
}
queryStr := fmt.Sprintf(
"DELETE from expiring_signed_user_data WHERE expiration_epoch < %d",
time.Now().Unix())
rows, err := db.Query(queryStr)
if err != nil {
logger.Printf("err='%s'", err)
return err
}
defer rows.Close()
return nil
}
func copyDBIntoSQLite(source, destination *sql.DB,
destinationType string) error {
if source == nil || destination == nil {
err := errors.New("nil databases")
return err
}
// Copy user profiles
rows, err := source.Query("SELECT username,profile_data FROM user_profile")
if err != nil {
logger.Printf("err='%s'", err)
return err
}
defer rows.Close()
queryStr := fmt.Sprintf(
"SELECT username, type, jws_data, expiration_epoch,update_epoch FROM expiring_signed_user_data WHERE expiration_epoch > %d",
time.Now().Unix())
genericRows, err := source.Query(queryStr)
if err != nil {
logger.Printf("err='%s'", err)
return err
}
defer genericRows.Close()
tx, err := destination.Begin()
if err != nil {
logger.Printf("err='%s'", err)
return err
}
defer tx.Rollback()
deleteProfilesQueryStr := fmt.Sprintf("DELETE from user_profile ")
if rows, err := destination.Query(deleteProfilesQueryStr); err != nil {
logger.Printf("err='%s'", err)
return err
} else {
rows.Close()
}
stmtText := saveUserProfileStmt[destinationType]
stmt, err := tx.Prepare(stmtText)
if err != nil {
logger.Printf("err='%s'", err)
return err
}
defer stmt.Close()
for rows.Next() {
var (
username string
profileBytes []byte
)
if err := rows.Scan(&username, &profileBytes); err != nil {
logger.Printf("err='%s'", err)
return err
}
_, err = stmt.Exec(username, profileBytes)
if err != nil {
logger.Printf("err='%s'", err)
return err
}
}
if err := rows.Err(); err != nil {
logger.Printf("err='%s'", err)
return err
}
expiringUpsertText := saveSignedUserDataStmt[destinationType]
expiringUpsertStmt, err := tx.Prepare(expiringUpsertText)
if err != nil {
logger.Printf("err='%s'", err)
return err
}
defer expiringUpsertStmt.Close()
for genericRows.Next() {
var (
username string
dataType int
jwsData string
expirationEpoch int64
updateEpoch int64
)
if err := genericRows.Scan(&username, &dataType, &jwsData,
&expirationEpoch, &updateEpoch); err != nil {
logger.Printf("err='%s'", err)
return err
}
//username, type, jws_data, expiration_epoch, update_epoch
_, err = expiringUpsertStmt.Exec(username, dataType, jwsData,
expirationEpoch, updateEpoch)
if err != nil {
logger.Printf("err='%s'", err)
return err
}
}
err = tx.Commit()
if err != nil {
logger.Printf("err='%s'", err)
return err
}
return nil
}
var getUsersStmt = map[string]string{
"sqlite": "select username from user_profile order by username",
"postgres": "select username from user_profile order by username",
}
type getUsersData struct {
Names []string
Err error
}
func gatherUsers(stmt *sql.Stmt) ([]string, error) {
rows, err := stmt.Query()
if err != nil {
return nil, err
}
defer rows.Close()
var names []string
for rows.Next() {
var name string
if err := rows.Scan(&name); err != nil {
return nil, err
}
names = append(names, name)
}
if err := rows.Err(); err != nil {
return nil, err
}
return names, nil
}
func (state *RuntimeState) GetUsers() ([]string, bool, error) {
ch := make(chan getUsersData, 1)
start := time.Now()
go func() {
stmtText := getUsersStmt[state.dbType]
stmt, err := state.db.Prepare(stmtText)
if err != nil {
logger.Printf("Error Preparing getUsers statement primary DB: %s",
err)
return
}
defer stmt.Close()
if state.remoteDBQueryTimeout == 0 {
time.Sleep(10 * time.Millisecond)
}
names, dbErr := gatherUsers(stmt)
ch <- getUsersData{Names: names, Err: dbErr}
close(ch)
}()
select {
case dbMessage := <-ch:
if dbMessage.Err != nil {
logger.Printf("Problem with db ='%s'", dbMessage.Err)
} else {
metricLogExternalServiceDuration("storage-read", time.Since(start))
}
return dbMessage.Names, false, dbMessage.Err
case <-time.After(state.remoteDBQueryTimeout):
logger.Println("GetUsers: timed out on primary DB")
stmtText := getUsersStmt["sqlite"]
stmt, err := state.cacheDB.Prepare(stmtText)
if err != nil {
logger.Printf("Error Preparing getUsers statement cached DB: %s",
err)
return nil, false, err
}
defer stmt.Close()
names, dbErr := gatherUsers(stmt)
if dbErr != nil {
logger.Printf("Problem with db = '%s'", err)
} else {
logger.Println("GetUsers: got data from DB cache")
}
return names, true, dbErr
}
}
var loadUserProfileStmt = map[string]string{
"sqlite": "select profile_data from user_profile where username = ?",
"postgres": "select profile_data from user_profile where username = $1",
}
/// Adding api to be load/save per user
// Notice: each operation load/save should be atomic.
type loadUserProfileData struct {
//fromDB bool
ProfileBytes []byte
Err error
}
// If there a valid user profile returns: profile, true nil
// If there is NO user profile returns default_object, false, nil
// Any other case: nil, false, error
func (state *RuntimeState) LoadUserProfile(username string) (
profile *userProfile, ok bool, fromCache bool, err error) {
var defaultProfile userProfile
defaultProfile.U2fAuthData = make(map[int64]*u2fAuthData)
defaultProfile.TOTPAuthData = make(map[int64]*totpAuthData)
ch := make(chan loadUserProfileData, 1)
start := time.Now()
go func(username string) { //loads profile from DB
var profileMessage loadUserProfileData
stmtText := loadUserProfileStmt[state.dbType]
stmt, err := state.db.Prepare(stmtText)
if err != nil {
logger.Printf("Error Preparing statement LoadUsers primary DB: %s",
err)
return
}
defer stmt.Close()
// if the remoteDBQueryTimeout == 0 this means we are actuallty trying
// to force the cached db. In single core systems, we need to ensure
// this goroutine yields to sthis sleep is necesary
if state.remoteDBQueryTimeout == 0 {
time.Sleep(10 * time.Millisecond)
}
profileMessage.Err = stmt.QueryRow(username).Scan(
&profileMessage.ProfileBytes)
ch <- profileMessage
}(username)
var profileBytes []byte
fromCache = false
select {
case dbMessage := <-ch:
err = dbMessage.Err
if err != nil {
if err.Error() == "sql: no rows in result set" {
logger.Printf("err='%s'", err)
return &defaultProfile, false, fromCache, nil
} else {
logger.Printf("Problem with db ='%s'", err)
return nil, false, fromCache, err
}
}
metricLogExternalServiceDuration("storage-read", time.Since(start))
profileBytes = dbMessage.ProfileBytes
case <-time.After(state.remoteDBQueryTimeout):
logger.Println("LoadUserProfile: timed out on primary DB")
fromCache = true
// load from cache
stmtText := loadUserProfileStmt["sqlite"]
stmt, err := state.cacheDB.Prepare(stmtText)
if err != nil {
logger.Printf("Error Preparing statement LoadUsers cache DB: %s",
err)
return nil, false, false, err
}
defer stmt.Close()
err = stmt.QueryRow(username).Scan(&profileBytes)
if err != nil {
if err.Error() == "sql: no rows in result set" {
logger.Printf("err='%s'", err)
return &defaultProfile, false, true, nil
} else {
logger.Printf("Problem with db ='%s'", err)
return nil, false, true, err
}
}
logger.Println("LoadUserProfile: got data from DB cache")
}
logger.Debugf(10, "profile bytes len=%d", len(profileBytes))
//gobReader := bytes.NewReader(fileBytes)
gobReader := bytes.NewReader(profileBytes)
decoder := gob.NewDecoder(gobReader)
err = decoder.Decode(&defaultProfile)
if err != nil {
return nil, false, fromCache,
fmt.Errorf("error decoding user profile: %s", err)
}
logger.Debugf(1, "loaded profile=%+v", defaultProfile)
return &defaultProfile, true, fromCache, nil
}
var saveUserProfileStmt = map[string]string{
"sqlite": "insert or replace into user_profile(username, profile_data) values(?, ?)",
"postgres": "insert into user_profile(username, profile_data) values ($1,$2) on CONFLICT(username) DO UPDATE set profile_data = excluded.profile_data",
}
func (state *RuntimeState) SaveUserProfile(username string,
profile *userProfile) error {
var gobBuffer bytes.Buffer
encoder := gob.NewEncoder(&gobBuffer)
if err := encoder.Encode(profile); err != nil {
return err
}
start := time.Now()
//insert into DB
tx, err := state.db.Begin()
if err != nil {
return err
}
defer tx.Rollback()
stmtText := saveUserProfileStmt[state.dbType]
stmt, err := tx.Prepare(stmtText)
if err != nil {
return err
}
defer stmt.Close()
_, err = stmt.Exec(username, gobBuffer.Bytes())
if err != nil {
return err
}
err = tx.Commit()
if err != nil {
return err
}
metricLogExternalServiceDuration("storage-save", time.Since(start))
return nil
}
var deleteUserProfileStmt = map[string]string{
"sqlite": "delete from user_profile where username = ?",
"postgres": "delete from user_profile where username = $1",
}
func (state *RuntimeState) DeleteUserProfile(username string) error {
//delete from DB
tx, err := state.db.Begin()
if err != nil {
return err
}
defer tx.Rollback()
stmtText := deleteUserProfileStmt[state.dbType]
stmt, err := tx.Prepare(stmtText)
if err != nil {
return err
}
defer stmt.Close()
_, err = stmt.Exec(username)
if err != nil {
return err
}
err = tx.Commit()
if err != nil {
return err
}
return nil
}
var deleteSignedUserDataStmt = map[string]string{
"sqlite": "delete from expiring_signed_user_data where username = ? and type = ?",
"postgres": "delete from expiring_signed_user_data where username = $1 and type = $2",
}
func (state *RuntimeState) DeleteSigned(username string, dataType int) error {
//insert into DB
tx, err := state.db.Begin()
if err != nil {
return err
}
defer tx.Rollback()
stmtText := deleteSignedUserDataStmt[state.dbType]
stmt, err := tx.Prepare(stmtText)
if err != nil {
return err
}
defer stmt.Close()
_, err = stmt.Exec(username, dataType)
if err != nil {
return err
}
err = tx.Commit()
if err != nil {
return err
}
return nil
}
type getSignedData struct {
JWSData string
Err error
}
var getSignedUserDataStmt = map[string]string{
"sqlite": "select jws_data from expiring_signed_user_data where username = ? and type =? and expiration_epoch > ?",
"postgres": "select jws_data from expiring_signed_user_data where username = $1 and type = $2 and expiration_epoch > $3",
}
func (state *RuntimeState) GetSigned(username string,
dataType int) (bool, string, error) {
logger.Printf("top of GetSigned")
//var jwsData string
ch := make(chan getSignedData, 1)
//start := time.Now()
go func(username string, dataType int) { //loads profile from DB
var signedDataMessage getSignedData
stmtText := getSignedUserDataStmt[state.dbType]
stmt, err := state.db.Prepare(stmtText)
if err != nil {
logger.Printf("Error Preparing statement GetSigned Primary DB: %s",
err)
return
}
defer stmt.Close()
if state.remoteDBQueryTimeout == 0 {
time.Sleep(10 * time.Millisecond)
}
signedDataMessage.Err = stmt.QueryRow(username, dataType,
time.Now().Unix()).Scan(&signedDataMessage.JWSData)
ch <- signedDataMessage
}(username, dataType)
var jwsData string
select {
case dbMessage := <-ch:
logger.Debugf(2, "got data from db. dbMessage=%+v", dbMessage)
err := dbMessage.Err
if err != nil {
err = dbMessage.Err
if err.Error() == "sql: no rows in result set" {
logger.Printf("err='%s'", err)
return false, "", nil
} else {
logger.Printf("Problem with db ='%s'", err)
return false, "", err
}
}
jwsData = dbMessage.JWSData
case <-time.After(state.remoteDBQueryTimeout):
logger.Println("GetSigned: timed out on primary DB")
// load from cache
stmtText := getSignedUserDataStmt["sqlite"]
stmt, err := state.cacheDB.Prepare(stmtText)
if err != nil {
logger.Printf("Error Preparing statement GetSigned Cache DB: %s",
err)
return false, "", err
}
defer stmt.Close()
err = stmt.QueryRow(username, dataType, time.Now().Unix()).Scan(
&jwsData)
if err != nil {
if err.Error() == "sql: no rows in result set" {
logger.Printf("err='%s'", err)
return false, "", nil
} else {
logger.Printf("Problem with db ='%s'", err)
return false, "", err
}
}
logger.Println("GetSigned: got data from DB cache")
}
logger.Println("GetSigned: got jwsdata")
storageJWT, err := state.getStorageDataFromStorageStringDataJWT(jwsData)
if err != nil {
logger.Debugf(2, "failed to get storage data %s data=%s", err, jwsData)
return false, "", err
}
if storageJWT.Subject != username {
logger.Debugf(2, "%s for %s", err, username)
return false, "", errors.New("inconsistent data coming from DB")
}
return true, storageJWT.Data, nil
}
var saveSignedUserDataStmt = map[string]string{
"sqlite": "insert or replace into expiring_signed_user_data(username, type, jws_data, expiration_epoch, update_epoch) values(?,?, ?, ?, ?)",
"postgres": "insert into expiring_signed_user_data(username, type, jws_data, expiration_epoch, update_epoch) values ($1,$2,$3,$4, $5) ON CONFLICT(username,type) DO UPDATE SET jws_data = excluded.jws_data, expiration_epoch = excluded.expiration_epoch",
}
func (state *RuntimeState) UpsertSigned(username string, dataType int,
expirationEpoch int64, data string) error {
logger.Debugf(2, "top of UpsertSigned")
//expirationEpoch := expiration.Unix()
stringData, err := state.genNewSerializedStorageStringDataJWT(username,
dataType, data, expirationEpoch)
if err != nil {
return err
}
start := time.Now()
//insert into DB
tx, err := state.db.Begin()
if err != nil {
return err
}
defer tx.Rollback()
stmtText := saveSignedUserDataStmt[state.dbType]
stmt, err := tx.Prepare(stmtText)
if err != nil {
return err
}
defer stmt.Close()
_, err = stmt.Exec(username, dataType, stringData, expirationEpoch,
time.Now().Unix())
if err != nil {
return err
}
err = tx.Commit()
if err != nil {
return err
}
metricLogExternalServiceDuration("storage-save", time.Since(start))
return nil
}