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audit.go
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audit.go
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/*
* Copyright (C) 2021 Nethesis S.r.l.
* http://www.nethesis.it - info@nethesis.it
*
* This file is part of NethServer project.
*
* NethServer is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License,
* or any later version.
*
* NethServer 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with NethServer. If not, see COPYING.
*
* author: Edoardo Spadoni <edoardo.spadoni@nethesis.it>
*/
package audit
import (
"fmt"
"os"
"strings"
"time"
"github.com/pkg/errors"
"github.com/NethServer/ns8-core/core/api-server/configuration"
"github.com/NethServer/ns8-core/core/api-server/models"
"github.com/NethServer/ns8-core/core/api-server/utils"
"database/sql"
_ "github.com/mattn/go-sqlite3"
)
func Init() {
// check audit file is set
if len(configuration.Config.AuditFile) > 0 {
// check if file exists
if _, err := os.Stat(configuration.Config.AuditFile); os.IsNotExist(err) {
// create audit db file and initialize it
create()
} else {
// check if db is valid
db, err := sql.Open("sqlite3", configuration.Config.AuditFile)
if err != nil {
// audit file invalid, create and initialize it
create()
}
defer db.Close()
// try a query
query := "SELECT * FROM audit LIMIT 1;"
_, err = db.Exec(query)
if err != nil {
// invalid sql schema, create and initialize it
create()
}
}
} else {
utils.LogError(errors.Wrap(errors.New("AUDIT_FILE is not set in the environment."), "[Audit DISABLED]"))
}
}
func create() {
// purge existing file
os.Remove(configuration.Config.AuditFile)
// create new db
db, errCreate := sql.Open("sqlite3", configuration.Config.AuditFile)
if errCreate != nil {
utils.LogError(errors.Wrap(errCreate, "error in audit db file creation"))
}
defer db.Close()
// define audit schema
query := `
CREATE TABLE audit (
id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT,
user TEXT NOT NULL,
action TEXT NOT NULL,
data TEXT NOT NULL,
timestamp TEXT NOT NULL
);
`
// execute create table
_, errExecute := db.Exec(query)
if errExecute != nil {
utils.LogError(errors.Wrap(errExecute, "error in audit file schema init"))
}
}
func Store(audit models.Audit) {
// check audit file is set
if len(configuration.Config.AuditFile) > 0 {
// open db
db, err := sql.Open("sqlite3", configuration.Config.AuditFile)
if err != nil {
utils.LogError(errors.Wrap(err, "[AUDIT][STORE] error in audit file schema open"))
}
defer db.Close()
// begin sqlite connection to insert
tx, err := db.Begin()
if err != nil {
utils.LogError(errors.Wrap(err, "[AUDIT][STORE] error in audit file schema begin"))
}
// define statement
stmt, err := tx.Prepare("INSERT INTO audit(id, user, action, data, timestamp) VALUES(null, ?, ?, ?, ?)")
if err != nil {
utils.LogError(errors.Wrap(err, "[AUDIT][STORE] error in audit file schema prepare"))
}
defer stmt.Close()
// execute statement
_, err = stmt.Exec(audit.User, audit.Action, audit.Data, audit.Timestamp.Format(time.RFC3339))
if err != nil {
utils.LogError(errors.Wrap(err, "[AUDIT][STORE] error in audit file schema execute"))
}
tx.Commit()
}
}
func QueryArgs(query string, args ...interface{}) []models.Audit {
// define results
var results []models.Audit
// check audit file is set
if len(configuration.Config.AuditFile) > 0 {
// open db
db, err := sql.Open("sqlite3", configuration.Config.AuditFile)
if err != nil {
utils.LogError(errors.Wrap(err, "[AUDIT][QUERY] error in audit file schema open"))
}
defer db.Close()
// define query
cleanArgs := make([]interface{}, 0, len(args))
for _, item := range args {
if item != "" {
if strings.Contains(fmt.Sprintf("%v", item), ",") {
parts := strings.Split(fmt.Sprintf("%v", item), ",")
for _, element := range parts {
cleanArgs = append(cleanArgs, element)
}
} else {
cleanArgs = append(cleanArgs, item)
}
}
}
rows, err := db.Query(query, cleanArgs...)
if err != nil {
utils.LogError(errors.Wrap(err, "[AUDIT][QUERY] error in audit query execution"))
}
defer rows.Close()
// loop rows
for rows.Next() {
var auditRow models.Audit
var timestamp string
if err := rows.Scan(&auditRow.ID, &auditRow.User, &auditRow.Action, &auditRow.Data, ×tamp); err != nil {
utils.LogError(errors.Wrap(err, "[AUDIT][QUERY] error in audit query row extraction"))
}
// parse date
t, err := time.Parse(time.RFC3339, timestamp)
if err != nil {
utils.LogError(errors.Wrap(err, "[AUDIT][QUERY] error in audit parse timestamp"))
}
// append results
auditRow.Timestamp = t
results = append(results, auditRow)
}
// check rows error
errRows := rows.Err()
if errRows != nil {
utils.LogError(errors.Wrap(errRows, "[AUDIT][QUERY] error in rows query loop"))
}
}
// return results
return results
}
func Query(query string) []string {
// define results
var results []string
// check audit file is set
if len(configuration.Config.AuditFile) > 0 {
// open db
db, err := sql.Open("sqlite3", configuration.Config.AuditFile)
if err != nil {
utils.LogError(errors.Wrap(err, "[AUDIT][QUERY] error in audit file schema open"))
}
defer db.Close()
// define query
rows, err := db.Query(query)
if err != nil {
utils.LogError(errors.Wrap(err, "[AUDIT][QUERY] error in audit query execution"))
}
defer rows.Close()
// loop rows
for rows.Next() {
var field string
if err := rows.Scan(&field); err != nil {
utils.LogError(errors.Wrap(err, "[AUDIT][QUERY] error in audit query row extraction"))
}
// append results
results = append(results, field)
}
// check rows error
errRows := rows.Err()
if errRows != nil {
utils.LogError(errors.Wrap(errRows, "[AUDIT][QUERY] error in rows query loop"))
}
}
// return results
return results
}