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package store
import (
"database/sql"
"encoding/json"
"fmt"
"strings"
"time"
"golang.org/x/crypto/ssh"
"github.com/go-sql-driver/mysql"
_ "github.com/mattn/go-sqlite3" // required by sql driver
)
type sqldb struct {
conn *sql.DB
get *sql.Stmt
set *sql.Stmt
list *sql.Stmt
revoke *sql.Stmt
revoked *sql.Stmt
}
func parse(config string) []string {
s := strings.Split(config, ":")
if s[0] == "sqlite" {
s[0] = "sqlite3"
return s
}
if len(s) == 4 {
s = append(s, "3306")
}
_, user, passwd, host, port := s[0], s[1], s[2], s[3], s[4]
c := &mysql.Config{
User: user,
Passwd: passwd,
Net: "tcp",
Addr: fmt.Sprintf("%s:%s", host, port),
DBName: "certs",
ParseTime: true,
}
return []string{"mysql", c.FormatDSN()}
}
// NewSQLStore returns a *sql.DB CertStorer.
func NewSQLStore(config string) (CertStorer, error) {
parsed := parse(config)
conn, err := sql.Open(parsed[0], parsed[1])
if err != nil {
return nil, fmt.Errorf("sqldb: could not get a connection: %v", err)
}
if err := conn.Ping(); err != nil {
conn.Close()
return nil, fmt.Errorf("sqldb: could not establish a good connection: %v", err)
}
db := &sqldb{
conn: conn,
}
if db.set, err = conn.Prepare("INSERT INTO issued_certs (key_id, principals, created_at, expires_at, raw_key) VALUES (?, ?, ?, ?, ?)"); err != nil {
return nil, fmt.Errorf("sqldb: prepare set: %v", err)
}
if db.get, err = conn.Prepare("SELECT * FROM issued_certs WHERE key_id = ?"); err != nil {
return nil, fmt.Errorf("sqldb: prepare get: %v", err)
}
if db.list, err = conn.Prepare("SELECT * FROM issued_certs WHERE ? <= expires_at"); err != nil {
return nil, fmt.Errorf("sqldb: prepare list: %v", err)
}
if db.revoke, err = conn.Prepare("UPDATE issued_certs SET revoked = 1 WHERE key_id = ?"); err != nil {
return nil, fmt.Errorf("sqldb: prepare revoke: %v", err)
}
if db.revoked, err = conn.Prepare("SELECT * FROM issued_certs WHERE revoked = 1 AND ? <= expires_at"); err != nil {
return nil, fmt.Errorf("sqldb: prepare revoked: %v", err)
}
return db, nil
}
// rowScanner is implemented by sql.Row and sql.Rows
type rowScanner interface {
Scan(dest ...interface{}) error
}
func scanCert(s rowScanner) (*CertRecord, error) {
var (
keyID sql.NullString
principals sql.NullString
createdAt time.Time
expires time.Time
revoked sql.NullBool
raw sql.NullString
)
if err := s.Scan(&keyID, &principals, &createdAt, &expires, &revoked, &raw); err != nil {
return nil, err
}
var p []string
if err := json.Unmarshal([]byte(principals.String), &p); err != nil {
return nil, err
}
return &CertRecord{
KeyID: keyID.String,
Principals: p,
CreatedAt: createdAt,
Expires: expires,
Revoked: revoked.Bool,
Raw: raw.String,
}, nil
}
func (db *sqldb) Get(id string) (*CertRecord, error) {
if err := db.conn.Ping(); err != nil {
return nil, err
}
return scanCert(db.get.QueryRow(id))
}
func (db *sqldb) SetCert(cert *ssh.Certificate) error {
return db.SetRecord(parseCertificate(cert))
}
func (db *sqldb) SetRecord(rec *CertRecord) error {
principals, err := json.Marshal(rec.Principals)
if err != nil {
return err
}
if err := db.conn.Ping(); err != nil {
return err
}
_, err = db.set.Exec(rec.KeyID, string(principals), rec.CreatedAt, rec.Expires, rec.Raw)
return err
}
func (db *sqldb) List() ([]*CertRecord, error) {
if err := db.conn.Ping(); err != nil {
return nil, err
}
var recs []*CertRecord
rows, _ := db.revoked.Query(time.Now().UTC())
defer rows.Close()
for rows.Next() {
cert, err := scanCert(rows)
if err != nil {
return nil, err
}
recs = append(recs, cert)
}
return recs, nil
}
func (db *sqldb) Revoke(id string) error {
if err := db.conn.Ping(); err != nil {
return err
}
_, err := db.revoke.Exec(id)
if err != nil {
return err
}
return nil
}
func (db *sqldb) GetRevoked() ([]*CertRecord, error) {
if err := db.conn.Ping(); err != nil {
return nil, err
}
var recs []*CertRecord
rows, _ := db.revoked.Query(time.Now().UTC())
defer rows.Close()
for rows.Next() {
cert, err := scanCert(rows)
if err != nil {
return nil, err
}
recs = append(recs, cert)
}
return recs, nil
}
func (db *sqldb) Close() error {
return db.conn.Close()
}
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