From 030ff273473f0a5620ba276a370e5119f57179df Mon Sep 17 00:00:00 2001
From: Niall Sheridan <nsheridan@gmail.com>
Date: Mon, 8 Aug 2016 23:39:46 +0100
Subject: SQLite DB support

---
 server/store/sqldb.go | 182 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 182 insertions(+)
 create mode 100644 server/store/sqldb.go

(limited to 'server/store/sqldb.go')

diff --git a/server/store/sqldb.go b/server/store/sqldb.go
new file mode 100644
index 0000000..2ea5ea5
--- /dev/null
+++ b/server/store/sqldb.go
@@ -0,0 +1,182 @@
+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"); 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.list.Query()
+	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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