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// Copyright (c) 2015 Spinpunch, Inc. All Rights Reserved.
// See License.txt for license information.
package store
import (
l4g "code.google.com/p/log4go"
"crypto/aes"
"crypto/cipher"
"crypto/hmac"
"crypto/sha256"
"crypto/sha512"
crand "crypto/rand"
dbsql "database/sql"
"encoding/base64"
"encoding/json"
"errors"
"fmt"
"github.com/go-gorp/gorp"
_ "github.com/go-sql-driver/mysql"
"github.com/mattermost/platform/model"
"github.com/mattermost/platform/utils"
"io"
sqltrace "log"
"math/rand"
"os"
"time"
)
type SqlStore struct {
master *gorp.DbMap
replicas []*gorp.DbMap
team TeamStore
channel ChannelStore
post PostStore
user UserStore
audit AuditStore
session SessionStore
}
func NewSqlStore() Store {
sqlStore := &SqlStore{}
sqlStore.master = setupConnection("master", utils.Cfg.SqlSettings.DriverName,
utils.Cfg.SqlSettings.DataSource, utils.Cfg.SqlSettings.MaxIdleConns,
utils.Cfg.SqlSettings.MaxOpenConns, utils.Cfg.SqlSettings.Trace)
sqlStore.replicas = make([]*gorp.DbMap, len(utils.Cfg.SqlSettings.DataSourceReplicas))
for i, replica := range utils.Cfg.SqlSettings.DataSourceReplicas {
sqlStore.replicas[i] = setupConnection(fmt.Sprintf("replica-%v", i), utils.Cfg.SqlSettings.DriverName, replica,
utils.Cfg.SqlSettings.MaxIdleConns, utils.Cfg.SqlSettings.MaxOpenConns,
utils.Cfg.SqlSettings.Trace)
}
sqlStore.team = NewSqlTeamStore(sqlStore)
sqlStore.channel = NewSqlChannelStore(sqlStore)
sqlStore.post = NewSqlPostStore(sqlStore)
sqlStore.user = NewSqlUserStore(sqlStore)
sqlStore.audit = NewSqlAuditStore(sqlStore)
sqlStore.session = NewSqlSessionStore(sqlStore)
sqlStore.master.CreateTablesIfNotExists()
sqlStore.team.(*SqlTeamStore).CreateIndexesIfNotExists()
sqlStore.channel.(*SqlChannelStore).CreateIndexesIfNotExists()
sqlStore.post.(*SqlPostStore).CreateIndexesIfNotExists()
sqlStore.user.(*SqlUserStore).CreateIndexesIfNotExists()
sqlStore.audit.(*SqlAuditStore).CreateIndexesIfNotExists()
sqlStore.session.(*SqlSessionStore).CreateIndexesIfNotExists()
sqlStore.team.(*SqlTeamStore).UpgradeSchemaIfNeeded()
sqlStore.channel.(*SqlChannelStore).UpgradeSchemaIfNeeded()
sqlStore.post.(*SqlPostStore).UpgradeSchemaIfNeeded()
sqlStore.user.(*SqlUserStore).UpgradeSchemaIfNeeded()
sqlStore.audit.(*SqlAuditStore).UpgradeSchemaIfNeeded()
sqlStore.session.(*SqlSessionStore).UpgradeSchemaIfNeeded()
return sqlStore
}
func setupConnection(con_type string, driver string, dataSource string, maxIdle int, maxOpen int, trace bool) *gorp.DbMap {
db, err := dbsql.Open(driver, dataSource)
if err != nil {
l4g.Critical("Failed to open sql connection to '%v' err:%v", dataSource, err)
time.Sleep(time.Second)
panic("Failed to open sql connection" + err.Error())
}
l4g.Info("Pinging sql %v database at '%v'", con_type, dataSource)
err = db.Ping()
if err != nil {
l4g.Critical("Failed to ping db err:%v", err)
time.Sleep(time.Second)
panic("Failed to open sql connection " + err.Error())
}
db.SetMaxIdleConns(maxIdle)
db.SetMaxOpenConns(maxOpen)
var dbmap *gorp.DbMap
if driver == "sqlite3" {
dbmap = &gorp.DbMap{Db: db, TypeConverter: mattermConverter{}, Dialect: gorp.SqliteDialect{}}
} else if driver == "mysql" {
dbmap = &gorp.DbMap{Db: db, TypeConverter: mattermConverter{}, Dialect: gorp.MySQLDialect{Engine: "InnoDB", Encoding: "UTF8"}}
} else {
l4g.Critical("Failed to create dialect specific driver")
time.Sleep(time.Second)
panic("Failed to create dialect specific driver " + err.Error())
}
if trace {
dbmap.TraceOn("", sqltrace.New(os.Stdout, "sql-trace:", sqltrace.Lmicroseconds))
}
return dbmap
}
func (ss SqlStore) CreateColumnIfNotExists(tableName string, columnName string, afterName string, colType string, defaultValue string) bool {
count, err := ss.GetMaster().SelectInt(
`SELECT
COUNT(0) AS column_exists
FROM
information_schema.COLUMNS
WHERE
TABLE_SCHEMA = DATABASE()
AND TABLE_NAME = ?
AND COLUMN_NAME = ?`,
tableName,
columnName,
)
if err != nil {
l4g.Critical("Failed to check if column exists %v", err)
time.Sleep(time.Second)
panic("Failed to check if column exists " + err.Error())
}
if count > 0 {
return false
}
_, err = ss.GetMaster().Exec("ALTER TABLE " + tableName + " ADD " + columnName + " " + colType + " DEFAULT '" + defaultValue + "'" + " AFTER " + afterName)
if err != nil {
l4g.Critical("Failed to create column %v", err)
time.Sleep(time.Second)
panic("Failed to create column " + err.Error())
}
return true
}
func (ss SqlStore) RemoveColumnIfExists(tableName string, columnName string) bool {
count, err := ss.GetMaster().SelectInt(
`SELECT
COUNT(0) AS column_exists
FROM
information_schema.COLUMNS
WHERE
TABLE_SCHEMA = DATABASE()
AND TABLE_NAME = ?
AND COLUMN_NAME = ?`,
tableName,
columnName,
)
if err != nil {
l4g.Critical("Failed to check if column exists %v", err)
time.Sleep(time.Second)
panic("Failed to check if column exists " + err.Error())
}
if count == 0 {
return false
}
_, err = ss.GetMaster().Exec("ALTER TABLE " + tableName + " DROP COLUMN " + columnName)
if err != nil {
l4g.Critical("Failed to drop column %v", err)
time.Sleep(time.Second)
panic("Failed to drop column " + err.Error())
}
return true
}
func (ss SqlStore) CreateIndexIfNotExists(indexName string, tableName string, columnName string) {
ss.createIndexIfNotExists(indexName, tableName, columnName, false)
}
func (ss SqlStore) CreateFullTextIndexIfNotExists(indexName string, tableName string, columnName string) {
ss.createIndexIfNotExists(indexName, tableName, columnName, true)
}
func (ss SqlStore) createIndexIfNotExists(indexName string, tableName string, columnName string, fullText bool) {
count, err := ss.GetMaster().SelectInt("SELECT COUNT(0) AS index_exists FROM information_schema.statistics WHERE TABLE_SCHEMA = DATABASE() and table_name = ? AND index_name = ?", tableName, indexName)
if err != nil {
l4g.Critical("Failed to check index", err)
time.Sleep(time.Second)
panic("Failed to check index" + err.Error())
}
if count > 0 {
return
}
fullTextIndex := ""
if fullText {
fullTextIndex = " FULLTEXT "
}
_, err = ss.GetMaster().Exec("CREATE " + fullTextIndex + " INDEX " + indexName + " ON " + tableName + " (" + columnName + ")")
if err != nil {
l4g.Critical("Failed to create index", err)
time.Sleep(time.Second)
panic("Failed to create index " + err.Error())
}
}
func (ss SqlStore) GetMaster() *gorp.DbMap {
return ss.master
}
func (ss SqlStore) GetReplica() *gorp.DbMap {
return ss.replicas[rand.Intn(len(ss.replicas))]
}
func (ss SqlStore) GetAllConns() []*gorp.DbMap {
all := make([]*gorp.DbMap, len(ss.replicas)+1)
copy(all, ss.replicas)
all[len(ss.replicas)] = ss.master
return all
}
func (ss SqlStore) Close() {
l4g.Info("Closing SqlStore")
ss.master.Db.Close()
for _, replica := range ss.replicas {
replica.Db.Close()
}
}
func (ss SqlStore) Team() TeamStore {
return ss.team
}
func (ss SqlStore) Channel() ChannelStore {
return ss.channel
}
func (ss SqlStore) Post() PostStore {
return ss.post
}
func (ss SqlStore) User() UserStore {
return ss.user
}
func (ss SqlStore) Session() SessionStore {
return ss.session
}
func (ss SqlStore) Audit() AuditStore {
return ss.audit
}
type mattermConverter struct{}
func (me mattermConverter) ToDb(val interface{}) (interface{}, error) {
switch t := val.(type) {
case model.StringMap:
return model.MapToJson(t), nil
case model.StringArray:
return model.ArrayToJson(t), nil
case model.EncryptStringMap:
return encrypt([]byte(utils.Cfg.SqlSettings.AtRestEncryptKey), model.MapToJson(t))
}
return val, nil
}
func (me mattermConverter) FromDb(target interface{}) (gorp.CustomScanner, bool) {
switch target.(type) {
case *model.StringMap:
binder := func(holder, target interface{}) error {
s, ok := holder.(*string)
if !ok {
return errors.New("FromDb: Unable to convert StringMap to *string")
}
b := []byte(*s)
return json.Unmarshal(b, target)
}
return gorp.CustomScanner{new(string), target, binder}, true
case *model.StringArray:
binder := func(holder, target interface{}) error {
s, ok := holder.(*string)
if !ok {
return errors.New("FromDb: Unable to convert StringArray to *string")
}
b := []byte(*s)
return json.Unmarshal(b, target)
}
return gorp.CustomScanner{new(string), target, binder}, true
case *model.EncryptStringMap:
binder := func(holder, target interface{}) error {
s, ok := holder.(*string)
if !ok {
return errors.New("FromDb: Unable to convert EncryptStringMap to *string")
}
ue, err := decrypt([]byte(utils.Cfg.SqlSettings.AtRestEncryptKey), *s)
if err != nil {
return err
}
b := []byte(ue)
return json.Unmarshal(b, target)
}
return gorp.CustomScanner{new(string), target, binder}, true
}
return gorp.CustomScanner{}, false
}
func encrypt(key []byte, text string) (string, error) {
if text == "" || text == "{}" {
return "", nil
}
plaintext := []byte(text)
skey := sha512.Sum512(key)
ekey, akey := skey[:32], skey[32:]
block, err := aes.NewCipher(ekey)
if err != nil {
return "", err
}
macfn := hmac.New(sha256.New, akey)
ciphertext := make([]byte, aes.BlockSize+macfn.Size()+len(plaintext))
iv := ciphertext[:aes.BlockSize]
if _, err := io.ReadFull(crand.Reader, iv); err != nil {
return "", err
}
stream := cipher.NewCFBEncrypter(block, iv)
stream.XORKeyStream(ciphertext[aes.BlockSize+macfn.Size():], plaintext)
macfn.Write(ciphertext[aes.BlockSize+macfn.Size():])
mac := macfn.Sum(nil)
copy(ciphertext[aes.BlockSize:aes.BlockSize+macfn.Size()], mac)
return base64.URLEncoding.EncodeToString(ciphertext), nil
}
func decrypt(key []byte, cryptoText string) (string, error) {
if cryptoText == "" || cryptoText == "{}" {
return "{}", nil
}
ciphertext, err := base64.URLEncoding.DecodeString(cryptoText)
if err != nil {
return "", err
}
skey := sha512.Sum512(key)
ekey, akey := skey[:32], skey[32:]
macfn := hmac.New(sha256.New, akey)
if len(ciphertext) < aes.BlockSize+macfn.Size() {
return "", errors.New("short ciphertext")
}
macfn.Write(ciphertext[aes.BlockSize+macfn.Size():])
expectedMac := macfn.Sum(nil)
mac := ciphertext[aes.BlockSize:aes.BlockSize+macfn.Size()]
if hmac.Equal(expectedMac, mac) != true {
return "", errors.New("Incorrect MAC for the given ciphertext")
}
block, err := aes.NewCipher(ekey)
if err != nil {
return "", err
}
if len(ciphertext) < aes.BlockSize {
return "", errors.New("ciphertext too short")
}
iv := ciphertext[:aes.BlockSize]
ciphertext = ciphertext[aes.BlockSize+macfn.Size():]
stream := cipher.NewCFBDecrypter(block, iv)
stream.XORKeyStream(ciphertext, ciphertext)
return fmt.Sprintf("%s", ciphertext), nil
}
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