package sql import ( "database/sql" "fmt" "net" "regexp" "strconv" "strings" "time" "github.com/lib/pq" sqlite3 "github.com/mattn/go-sqlite3" "github.com/sirupsen/logrus" "github.com/dexidp/dex/storage" ) const ( // postgres error codes pgErrUniqueViolation = "23505" // unique_violation ) // SQLite3 options for creating an SQL db. type SQLite3 struct { // File to File string `json:"file"` } // Open creates a new storage implementation backed by SQLite3 func (s *SQLite3) Open(logger logrus.FieldLogger) (storage.Storage, error) { conn, err := s.open(logger) if err != nil { return nil, err } return conn, nil } func (s *SQLite3) open(logger logrus.FieldLogger) (*conn, error) { db, err := sql.Open("sqlite3", s.File) if err != nil { return nil, err } if s.File == ":memory:" { // sqlite3 uses file locks to coordinate concurrent access. In memory // doesn't support this, so limit the number of connections to 1. db.SetMaxOpenConns(1) } errCheck := func(err error) bool { sqlErr, ok := err.(sqlite3.Error) if !ok { return false } return sqlErr.ExtendedCode == sqlite3.ErrConstraintPrimaryKey } c := &conn{db, flavorSQLite3, logger, errCheck} if _, err := c.migrate(); err != nil { return nil, fmt.Errorf("failed to perform migrations: %v", err) } return c, nil } const ( sslDisable = "disable" sslRequire = "require" sslVerifyCA = "verify-ca" sslVerifyFull = "verify-full" ) // PostgresSSL represents SSL options for Postgres databases. type PostgresSSL struct { Mode string CAFile string // Files for client auth. KeyFile string CertFile string } // Postgres options for creating an SQL db. type Postgres struct { Database string User string Password string Host string Port uint16 SSL PostgresSSL `json:"ssl" yaml:"ssl"` ConnectionTimeout int // Seconds // database/sql tunables, see // https://golang.org/pkg/database/sql/#DB.SetConnMaxLifetime and below // Note: defaults will be set if these are 0 MaxOpenConns int // default: 5 MaxIdleConns int // default: 5 ConnMaxLifetime int // Seconds, default: not set } // Open creates a new storage implementation backed by Postgres. func (p *Postgres) Open(logger logrus.FieldLogger) (storage.Storage, error) { conn, err := p.open(logger, p.createDataSourceName()) if err != nil { return nil, err } return conn, nil } var strEsc = regexp.MustCompile(`([\\'])`) func dataSourceStr(str string) string { return "'" + strEsc.ReplaceAllString(str, `\$1`) + "'" } // createDataSourceName takes the configuration provided via the Postgres // struct to create a data-source name that Go's database/sql package can // make use of. func (p *Postgres) createDataSourceName() string { parameters := []string{} addParam := func(key, val string) { parameters = append(parameters, fmt.Sprintf("%s=%s", key, val)) } addParam("connect_timeout", strconv.Itoa(p.ConnectionTimeout)) // detect host:port for backwards-compatibility host, port, err := net.SplitHostPort(p.Host) if err != nil { // not host:port, probably unix socket or bare address host = p.Host if p.Port != 0 { port = strconv.Itoa(int(p.Port)) } } if host != "" { addParam("host", dataSourceStr(host)) } if port != "" { addParam("port", port) } if p.User != "" { addParam("user", dataSourceStr(p.User)) } if p.Password != "" { addParam("password", dataSourceStr(p.Password)) } if p.Database != "" { addParam("dbname", dataSourceStr(p.Database)) } if p.SSL.Mode == "" { // Assume the strictest mode if unspecified. addParam("sslmode", dataSourceStr(sslVerifyFull)) } else { addParam("sslmode", dataSourceStr(p.SSL.Mode)) } if p.SSL.CAFile != "" { addParam("sslrootcert", dataSourceStr(p.SSL.CAFile)) } if p.SSL.CertFile != "" { addParam("sslcert", dataSourceStr(p.SSL.CertFile)) } if p.SSL.KeyFile != "" { addParam("sslkey", dataSourceStr(p.SSL.KeyFile)) } return strings.Join(parameters, " ") } func (p *Postgres) open(logger logrus.FieldLogger, dataSourceName string) (*conn, error) { db, err := sql.Open("postgres", dataSourceName) if err != nil { return nil, err } // set database/sql tunables if configured if p.ConnMaxLifetime != 0 { db.SetConnMaxLifetime(time.Duration(p.ConnMaxLifetime) * time.Second) } if p.MaxIdleConns == 0 { db.SetMaxIdleConns(5) } else { db.SetMaxIdleConns(p.MaxIdleConns) } if p.MaxOpenConns == 0 { db.SetMaxOpenConns(5) } else { db.SetMaxOpenConns(p.MaxOpenConns) } errCheck := func(err error) bool { sqlErr, ok := err.(*pq.Error) if !ok { return false } return sqlErr.Code == pgErrUniqueViolation } c := &conn{db, flavorPostgres, logger, errCheck} if _, err := c.migrate(); err != nil { return nil, fmt.Errorf("failed to perform migrations: %v", err) } return c, nil }