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database.go
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database.go
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package configs
/*
Sliver Implant Framework
Copyright (C) 2020 Bishop Fox
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
import (
"encoding/json"
"errors"
"fmt"
"net/url"
"os"
"path"
"path/filepath"
"github.com/starkzarn/glod/server/assets"
"github.com/starkzarn/glod/server/log"
)
const (
// Sqlite - SQLite protocol
Sqlite = "sqlite3"
// Postgres - Postgresql protocol
Postgres = "postgresql"
// MySQL - MySQL protocol
MySQL = "mysql"
databaseConfigFileName = "database.json"
)
var (
// ErrInvalidDialect - An invalid dialect was specified
ErrInvalidDialect = errors.New("invalid SQL Dialect")
databaseConfigLog = log.NamedLogger("config", "database")
)
// GetDatabaseConfigPath - File path to config.json
func GetDatabaseConfigPath() string {
appDir := assets.GetRootAppDir()
databaseConfigPath := filepath.Join(appDir, "configs", databaseConfigFileName)
databaseConfigLog.Debugf("Loading config from %s", databaseConfigPath)
return databaseConfigPath
}
// DatabaseConfig - Server config
type DatabaseConfig struct {
Dialect string `json:"dialect"`
Database string `json:"database"`
Username string `json:"username"`
Password string `json:"password"`
Host string `json:"host"`
Port uint16 `json:"port"`
Params map[string]string `json:"params"`
MaxIdleConns int `json:"max_idle_conns"`
MaxOpenConns int `json:"max_open_conns"`
LogLevel string `json:"log_level"`
}
// DSN - Get the db connections string
// https://github.com/go-sql-driver/mysql#examples
func (c *DatabaseConfig) DSN() (string, error) {
switch c.Dialect {
case Sqlite:
filePath := filepath.Join(assets.GetRootAppDir(), "sliver.db")
params := encodeParams(c.Params)
return fmt.Sprintf("file:%s?%s", filePath, params), nil
case MySQL:
user := url.QueryEscape(c.Username)
password := url.QueryEscape(c.Password)
db := url.QueryEscape(c.Database)
host := fmt.Sprintf("%s:%d", url.QueryEscape(c.Host), c.Port)
params := encodeParams(c.Params)
databaseConfigLog.Infof("Connecting to MySQL database %s@%s/%s", user, host, db)
return fmt.Sprintf("%s:%s@tcp(%s)/%s?%s", user, password, host, db, params), nil
case Postgres:
user := url.QueryEscape(c.Username)
password := url.QueryEscape(c.Password)
db := url.QueryEscape(c.Database)
host := url.QueryEscape(c.Host)
port := c.Port
params := encodeParams(c.Params)
databaseConfigLog.Infof("Connecting to Postgres database %s@%s:%d/%s", user, host, port, db)
return fmt.Sprintf("host=%s port=%d user=%s password=%s dbname=%s %s", host, port, user, password, db, params), nil
default:
return "", ErrInvalidDialect
}
}
func encodeParams(rawParams map[string]string) string {
params := url.Values{}
for key, value := range rawParams {
params.Add(key, value)
}
return params.Encode()
}
// Save - Save config file to disk
func (c *DatabaseConfig) Save() error {
configPath := GetDatabaseConfigPath()
configDir := path.Dir(configPath)
if _, err := os.Stat(configDir); os.IsNotExist(err) {
databaseConfigLog.Debugf("Creating config dir %s", configDir)
err := os.MkdirAll(configDir, 0700)
if err != nil {
return err
}
}
data, err := json.MarshalIndent(c, "", " ")
if err != nil {
return err
}
databaseConfigLog.Infof("Saving config to %s", configPath)
err = os.WriteFile(configPath, data, 0600)
if err != nil {
databaseConfigLog.Errorf("Failed to write config %s", err)
}
return nil
}
// GetDatabaseConfig - Get config value
func GetDatabaseConfig() *DatabaseConfig {
configPath := GetDatabaseConfigPath()
config := getDefaultDatabaseConfig()
if _, err := os.Stat(configPath); !os.IsNotExist(err) {
data, err := os.ReadFile(configPath)
if err != nil {
databaseConfigLog.Errorf("Failed to read config file %s", err)
return config
}
err = json.Unmarshal(data, config)
if err != nil {
databaseConfigLog.Errorf("Failed to parse config file %s", err)
return config
}
} else {
databaseConfigLog.Warnf("Config file does not exist, using defaults")
}
if config.MaxIdleConns < 1 {
config.MaxIdleConns = 1
}
if config.MaxOpenConns < 1 {
config.MaxOpenConns = 1
}
err := config.Save() // This updates the config with any missing fields
if err != nil {
databaseConfigLog.Errorf("Failed to save default config %s", err)
}
return config
}
func getDefaultDatabaseConfig() *DatabaseConfig {
return &DatabaseConfig{
Dialect: Sqlite,
MaxIdleConns: 10,
MaxOpenConns: 100,
LogLevel: "warn",
}
}