Merge pull request #1485 from bonifaido/mysql-storage

MySQL storage - Take 2

.travis.yml

@@ -2,19 +2,39 @@ language: go
 
 sudo: required
 
+dist: xenial
+
 matrix:
   include:
     - go: '1.12.x'
 
 env:
-  global: DEX_POSTGRES_DATABASE=postgres DEX_POSTGRES_USER=postgres DEX_POSTGRES_HOST="localhost" DEX_ETCD_ENDPOINTS=http://localhost:2379 DEX_LDAP_TESTS=1 DEBIAN_FRONTEND=noninteractive DEX_KEYSTONE_URL=http://localhost:5000 DEX_KEYSTONE_ADMIN_URL=http://localhost:35357 DEX_KEYSTONE_ADMIN_USER=demo DEX_KEYSTONE_ADMIN_PASS=DEMO_PASS
+  global:
+    - DEX_MYSQL_DATABASE=dex
+    - DEX_MYSQL_USER=root
+    - DEX_MYSQL_HOST="localhost"
+    - DEX_MYSQL_PASSWORD=""
+    - DEX_POSTGRES_DATABASE=postgres
+    - DEX_POSTGRES_USER=postgres
+    - DEX_POSTGRES_HOST="localhost"
+    - DEX_ETCD_ENDPOINTS=http://localhost:2379
+    - DEX_LDAP_TESTS=1
+    - DEBIAN_FRONTEND=noninteractive
+    - DEX_KEYSTONE_URL=http://localhost:5000
+    - DEX_KEYSTONE_ADMIN_URL=http://localhost:35357
+    - DEX_KEYSTONE_ADMIN_USER=demo
+    - DEX_KEYSTONE_ADMIN_PASS=DEMO_PASS
 
 go_import_path: github.com/dexidp/dex
 
 services:
+  - mysql
   - postgresql
   - docker
 
+before_install:
+  - mysql -e 'CREATE DATABASE dex;'
+
 install:
   - sudo -E apt-get install -y --force-yes slapd time ldap-utils
   - sudo /etc/init.d/slapd stop

Documentation/storage.md

@@ -298,6 +298,35 @@ storage:
 
 The SSL "mode" corresponds to the `github.com/lib/pq` package [connection options][psql-conn-options]. If unspecified, dex defaults to the strictest mode "verify-full".
 
+### MySQL
+
+Dex requires MySQL 5.7 or later version. When using MySQL, admins may want to dedicate a database to dex for the following reasons:
+
+1. Dex requires privileged access to its database because it performs migrations.
+2. Dex's database table names are not configurable; when shared with other applications there may be table name clashes.
+
+```
+CREATE DATABASE dex_db;
+CREATE USER dex WITH PASSWORD '66964843358242dbaaa7778d8477c288';
+GRANT ALL PRIVILEGES ON DATABASE dex_db TO dex;
+```
+
+An example config for MySQL setup using these values:
+
+```
+storage:
+  type: mysql
+  config:
+    database: dex_db
+    user: dex
+    password: 66964843358242dbaaa7778d8477c288
+    ssl:
+      mode: custom
+      caFile: /etc/dex/mysql.ca
+```
+
+The SSL "mode" corresponds to the `github.com/go-sql-driver/mysql` package [connection options][mysql-conn-options]. If unspecified, dex defaults to the strictest mode "true".
+
 ## Adding a new storage options
 
 Each storage implementation bears a large ongoing maintenance cost and needs to be updated every time a feature requires storing a new type. Bugs often require in depth knowledge of the backing software, and much of this work will be done by developers who are not the original author. Changes to dex which add new storage implementations are not merged lightly.
@@ -320,4 +349,5 @@ Any proposal to add a new implementation must address the following:
 [issues-transaction-tests]: https://github.com/dexidp/dex/issues/600
 [k8s-api]: https://github.com/kubernetes/kubernetes/blob/master/docs/devel/api-conventions.md#concurrency-control-and-consistency
 [psql-conn-options]: https://godoc.org/github.com/lib/pq#hdr-Connection_String_Parameters
+[mysql-conn-options]: https://github.com/go-sql-driver/mysql#tls
 [crd]: https://kubernetes.io/docs/tasks/access-kubernetes-api/extend-api-custom-resource-definitions/

cmd/dex/config.go

@@ -136,6 +136,7 @@ var storages = map[string]func() StorageConfig{
 	"memory":     func() StorageConfig { return new(memory.Config) },
 	"sqlite3":    func() StorageConfig { return new(sql.SQLite3) },
 	"postgres":   func() StorageConfig { return new(sql.Postgres) },
+	"mysql":      func() StorageConfig { return new(sql.MySQL) },
 }
 
 // UnmarshalJSON allows Storage to implement the unmarshaler interface to

cmd/dex/config_test.go

@@ -76,12 +76,14 @@ logger:
 		Storage: Storage{
 			Type: "postgres",
 			Config: &sql.Postgres{
-				Host:              "10.0.0.1",
-				Port:              65432,
-				MaxOpenConns:      5,
-				MaxIdleConns:      3,
-				ConnMaxLifetime:   30,
-				ConnectionTimeout: 3,
+				NetworkDB: sql.NetworkDB{
+					Host:              "10.0.0.1",
+					Port:              65432,
+					MaxOpenConns:      5,
+					MaxIdleConns:      3,
+					ConnMaxLifetime:   30,
+					ConnectionTimeout: 3,
+				},
 			},
 		},
 		Web: Web{

go.mod

@@ -5,6 +5,7 @@ require (
 	github.com/beorn7/perks v0.0.0-20160229213445-3ac7bf7a47d1 // indirect
 	github.com/boltdb/bolt v1.3.1 // indirect
 	github.com/cockroachdb/cmux v0.0.0-20170110192607-30d10be49292 // indirect
+	github.com/coreos/dex v2.13.0+incompatible // indirect
 	github.com/coreos/etcd v3.2.9+incompatible
 	github.com/coreos/go-oidc v2.0.0+incompatible
 	github.com/coreos/go-semver v0.2.0 // indirect
@@ -14,6 +15,7 @@ require (
 	github.com/dgrijalva/jwt-go v3.2.0+incompatible // indirect
 	github.com/felixge/httpsnoop v1.0.0
 	github.com/ghodss/yaml v0.0.0-20161020005002-bea76d6a4713
+	github.com/go-sql-driver/mysql v1.4.1
 	github.com/gogo/protobuf v1.1.1 // indirect
 	github.com/golang/groupcache v0.0.0-20181024230925-c65c006176ff // indirect
 	github.com/golang/protobuf v0.0.0-20171113180720-1e59b77b52bf

go.sum

@@ -6,6 +6,8 @@ github.com/boltdb/bolt v1.3.1 h1:JQmyP4ZBrce+ZQu0dY660FMfatumYDLun9hBCUVIkF4=
 github.com/boltdb/bolt v1.3.1/go.mod h1:clJnj/oiGkjum5o1McbSZDSLxVThjynRyGBgiAx27Ps=
 github.com/cockroachdb/cmux v0.0.0-20170110192607-30d10be49292 h1:dzj1/xcivGjNPwwifh/dWTczkwcuqsXXFHY1X/TZMtw=
 github.com/cockroachdb/cmux v0.0.0-20170110192607-30d10be49292/go.mod h1:qRiX68mZX1lGBkTWyp3CLcenw9I94W2dLeRvMzcn9N4=
+github.com/coreos/dex v2.13.0+incompatible h1:iwTFQFV7PnQ91+vSVhXGWdzEcF4I+U52DgEGDrwGWfk=
+github.com/coreos/dex v2.13.0+incompatible/go.mod h1:eWiVFa+I1sIRiwXi4bJMZvd90+H7EhRm/J1Y6Y18AOM=
 github.com/coreos/etcd v3.2.9+incompatible h1:3TbjfK5+aSRLTU/KgBC1xlgA2dn2ddYQngRqX6HFwlQ=
 github.com/coreos/etcd v3.2.9+incompatible/go.mod h1:uF7uidLiAD3TWHmW31ZFd/JWoc32PjwdhPthX9715RE=
 github.com/coreos/go-oidc v2.0.0+incompatible h1:+RStIopZ8wooMx+Vs5Bt8zMXxV1ABl5LbakNExNmZIg=
@@ -24,6 +26,8 @@ github.com/felixge/httpsnoop v1.0.0 h1:gh8fMGz0rlOv/1WmRZm7OgncIOTsAj21iNJot48om
 github.com/felixge/httpsnoop v1.0.0/go.mod h1:3+D9sFq0ahK/JeJPhCBUV1xlf4/eIYrUQaxulT0VzX8=
 github.com/ghodss/yaml v0.0.0-20161020005002-bea76d6a4713 h1:ag3kFMoZZMrEBi4ySTdSWSPz8K7Slu++J9/QXzLBiLk=
 github.com/ghodss/yaml v0.0.0-20161020005002-bea76d6a4713/go.mod h1:4dBDuWmgqj2HViK6kFavaiC9ZROes6MMH2rRYeMEF04=
+github.com/go-sql-driver/mysql v1.4.1 h1:g24URVg0OFbNUTx9qqY1IRZ9D9z3iPyi5zKhQZpNwpA=
+github.com/go-sql-driver/mysql v1.4.1/go.mod h1:zAC/RDZ24gD3HViQzih4MyKcchzm+sOG5ZlKdlhCg5w=
 github.com/gogo/protobuf v1.1.1 h1:72R+M5VuhED/KujmZVcIquuo8mBgX4oVda//DQb3PXo=
 github.com/gogo/protobuf v1.1.1/go.mod h1:r8qH/GZQm5c6nD/R0oafs1akxWv10x8SbQlK7atdtwQ=
 github.com/golang/groupcache v0.0.0-20181024230925-c65c006176ff h1:kOkM9whyQYodu09SJ6W3NCsHG7crFaJILQ22Gozp3lg=

storage/sql/config.go

@@ -1,14 +1,18 @@
 package sql
 
 import (
+	"crypto/tls"
+	"crypto/x509"
 	"database/sql"
 	"fmt"
+	"io/ioutil"
 	"net"
 	"regexp"
 	"strconv"
 	"strings"
 	"time"
 
+	"github.com/go-sql-driver/mysql"
 	"github.com/lib/pq"
 	sqlite3 "github.com/mattn/go-sqlite3"
 
@@ -21,6 +25,12 @@ const (
 	pgErrUniqueViolation = "23505" // unique_violation
 )
 
+const (
+	// MySQL error codes
+	mysqlErrDupEntry            = 1062
+	mysqlErrDupEntryWithKeyName = 1586
+)
+
 // SQLite3 options for creating an SQL db.
 type SQLite3 struct {
 	// File to
@@ -63,31 +73,29 @@ func (s *SQLite3) open(logger log.Logger) (*conn, error) {
 }
 
 const (
-	sslDisable    = "disable"
-	sslRequire    = "require"
-	sslVerifyCA   = "verify-ca"
-	sslVerifyFull = "verify-full"
+	// postgres SSL modes
+	pgSSLDisable    = "disable"
+	pgSSLRequire    = "require"
+	pgSSLVerifyCA   = "verify-ca"
+	pgSSLVerifyFull = "verify-full"
 )
 
-// PostgresSSL represents SSL options for Postgres databases.
-type PostgresSSL struct {
-	Mode   string
-	CAFile string
-	// Files for client auth.
-	KeyFile  string
-	CertFile string
-}
+const (
+	// MySQL SSL modes
+	mysqlSSLTrue       = "true"
+	mysqlSSLFalse      = "false"
+	mysqlSSLSkipVerify = "skip-verify"
+	mysqlSSLCustom     = "custom"
+)
 
-// Postgres options for creating an SQL db.
-type Postgres struct {
+// NetworkDB contains options common to SQL databases accessed over network.
+type NetworkDB struct {
 	Database string
 	User     string
 	Password string
 	Host     string
 	Port     uint16
 
-	SSL PostgresSSL `json:"ssl" yaml:"ssl"`
-
 	ConnectionTimeout int // Seconds
 
 	// database/sql tunables, see
@@ -98,9 +106,25 @@ type Postgres struct {
 	ConnMaxLifetime int // Seconds, default: not set
 }
 
+// SSL represents SSL options for network databases.
+type SSL struct {
+	Mode   string
+	CAFile string
+	// Files for client auth.
+	KeyFile  string
+	CertFile string
+}
+
+// Postgres options for creating an SQL db.
+type Postgres struct {
+	NetworkDB
+
+	SSL SSL `json:"ssl" yaml:"ssl"`
+}
+
 // Open creates a new storage implementation backed by Postgres.
 func (p *Postgres) Open(logger log.Logger) (storage.Storage, error) {
-	conn, err := p.open(logger, p.createDataSourceName())
+	conn, err := p.open(logger)
 	if err != nil {
 		return nil, err
 	}
@@ -159,7 +183,7 @@ func (p *Postgres) createDataSourceName() string {
 
 	if p.SSL.Mode == "" {
 		// Assume the strictest mode if unspecified.
-		addParam("sslmode", dataSourceStr(sslVerifyFull))
+		addParam("sslmode", dataSourceStr(pgSSLVerifyFull))
 	} else {
 		addParam("sslmode", dataSourceStr(p.SSL.Mode))
 	}
@@ -179,7 +203,9 @@ func (p *Postgres) createDataSourceName() string {
 	return strings.Join(parameters, " ")
 }
 
-func (p *Postgres) open(logger log.Logger, dataSourceName string) (*conn, error) {
+func (p *Postgres) open(logger log.Logger) (*conn, error) {
+	dataSourceName := p.createDataSourceName()
+
 	db, err := sql.Open("postgres", dataSourceName)
 	if err != nil {
 		return nil, err
@@ -216,3 +242,108 @@ func (p *Postgres) open(logger log.Logger, dataSourceName string) (*conn, error)
 	}
 	return c, nil
 }
+
+// MySQL options for creating a MySQL db.
+type MySQL struct {
+	NetworkDB
+
+	SSL SSL `json:"ssl" yaml:"ssl"`
+
+	// TODO(pborzenkov): used by tests to reduce lock wait timeout. Should
+	// we make it exported and allow users to provide arbitrary params?
+	params map[string]string
+}
+
+// Open creates a new storage implementation backed by MySQL.
+func (s *MySQL) Open(logger log.Logger) (storage.Storage, error) {
+	conn, err := s.open(logger)
+	if err != nil {
+		return nil, err
+	}
+	return conn, nil
+}
+
+func (s *MySQL) open(logger log.Logger) (*conn, error) {
+	cfg := mysql.Config{
+		User:                 s.User,
+		Passwd:               s.Password,
+		DBName:               s.Database,
+		AllowNativePasswords: true,
+
+		Timeout: time.Second * time.Duration(s.ConnectionTimeout),
+
+		ParseTime: true,
+		Params: map[string]string{
+			"transaction_isolation": "'SERIALIZABLE'",
+		},
+	}
+	if s.Host != "" {
+		if s.Host[0] != '/' {
+			cfg.Net = "tcp"
+			cfg.Addr = s.Host
+		} else {
+			cfg.Net = "unix"
+			cfg.Addr = s.Host
+		}
+	}
+	if s.SSL.CAFile != "" || s.SSL.CertFile != "" || s.SSL.KeyFile != "" {
+		if err := s.makeTLSConfig(); err != nil {
+			return nil, fmt.Errorf("failed to make TLS config: %v", err)
+		}
+		cfg.TLSConfig = mysqlSSLCustom
+	} else if s.SSL.Mode == "" {
+		cfg.TLSConfig = mysqlSSLTrue
+	} else {
+		cfg.TLSConfig = s.SSL.Mode
+	}
+	for k, v := range s.params {
+		cfg.Params[k] = v
+	}
+
+	db, err := sql.Open("mysql", cfg.FormatDSN())
+	if err != nil {
+		return nil, err
+	}
+
+	errCheck := func(err error) bool {
+		sqlErr, ok := err.(*mysql.MySQLError)
+		if !ok {
+			return false
+		}
+		return sqlErr.Number == mysqlErrDupEntry ||
+			sqlErr.Number == mysqlErrDupEntryWithKeyName
+	}
+
+	c := &conn{db, flavorMySQL, logger, errCheck}
+	if _, err := c.migrate(); err != nil {
+		return nil, fmt.Errorf("failed to perform migrations: %v", err)
+	}
+	return c, nil
+}
+
+func (s *MySQL) makeTLSConfig() error {
+	cfg := &tls.Config{}
+	if s.SSL.CAFile != "" {
+		rootCertPool := x509.NewCertPool()
+		pem, err := ioutil.ReadFile(s.SSL.CAFile)
+		if err != nil {
+			return err
+		}
+		if ok := rootCertPool.AppendCertsFromPEM(pem); !ok {
+			return fmt.Errorf("failed to append PEM")
+		}
+		cfg.RootCAs = rootCertPool
+	}
+	if s.SSL.CertFile != "" && s.SSL.KeyFile != "" {
+		clientCert := make([]tls.Certificate, 0, 1)
+		certs, err := tls.LoadX509KeyPair(s.SSL.CertFile, s.SSL.KeyFile)
+		if err != nil {
+			return err
+		}
+		clientCert = append(clientCert, certs)
+		cfg.Certificates = clientCert
+	}
+
+	mysql.RegisterTLSConfig(mysqlSSLCustom, cfg)
+	return nil
+}

storage/sql/config_test.go

@@ -9,6 +9,7 @@ import (
 
 	"github.com/sirupsen/logrus"
 
+	"github.com/dexidp/dex/pkg/log"
 	"github.com/dexidp/dex/storage"
 	"github.com/dexidp/dex/storage/conformance"
 )
@@ -32,15 +33,16 @@ func withTimeout(t time.Duration, f func()) {
 }
 
 func cleanDB(c *conn) error {
-	_, err := c.Exec(`
-		delete from client;
-		delete from auth_request;
-		delete from auth_code;
-		delete from refresh_token;
-		delete from keys;
-		delete from password;
-	`)
-	return err
+	tables := []string{"client", "auth_request", "auth_code",
+		"refresh_token", "keys", "password"}
+
+	for _, tbl := range tables {
+		_, err := c.Exec("delete from " + tbl)
+		if err != nil {
+			return err
+		}
+	}
+	return nil
 }
 
 var logger = &logrus.Logger{
@@ -49,23 +51,39 @@ var logger = &logrus.Logger{
 	Level:     logrus.DebugLevel,
 }
 
-func TestSQLite3(t *testing.T) {
+type opener interface {
+	open(logger log.Logger) (*conn, error)
+}
+
+func testDB(t *testing.T, o opener, withTransactions bool) {
+	// t.Fatal has a bad habbit of not actually printing the error
+	fatal := func(i interface{}) {
+		fmt.Fprintln(os.Stdout, i)
+		t.Fatal(i)
+	}
+
 	newStorage := func() storage.Storage {
-		// NOTE(ericchiang): In memory means we only get one connection at a time. If we
-		// ever write tests that require using multiple connections, for instance to test
-		// transactions, we need to move to a file based system.
-		s := &SQLite3{":memory:"}
-		conn, err := s.open(logger)
+		conn, err := o.open(logger)
 		if err != nil {
-			fmt.Fprintln(os.Stdout, err)
-			t.Fatal(err)
+			fatal(err)
+		}
+		if err := cleanDB(conn); err != nil {
+			fatal(err)
 		}
 		return conn
 	}
-
-	withTimeout(time.Second*10, func() {
+	withTimeout(time.Minute*1, func() {
 		conformance.RunTests(t, newStorage)
 	})
+	if withTransactions {
+		withTimeout(time.Minute*1, func() {
+			conformance.RunTransactionTests(t, newStorage)
+		})
+	}
+}
+
+func TestSQLite3(t *testing.T) {
+	testDB(t, &SQLite3{":memory:"}, false)
 }
 
 func getenv(key, defaultVal string) string {
@@ -91,19 +109,23 @@ func TestCreateDataSourceName(t *testing.T) {
 		{
 			description: "with typical configuration",
 			input: &Postgres{
-				Host:     "1.2.3.4",
-				Port:     6543,
-				User:     "some-user",
-				Password: "some-password",
-				Database: "some-db",
+				NetworkDB: NetworkDB{
+					Host:     "1.2.3.4",
+					Port:     6543,
+					User:     "some-user",
+					Password: "some-password",
+					Database: "some-db",
+				},
 			},
 			expected: "connect_timeout=0 host='1.2.3.4' port=6543 user='some-user' password='some-password' dbname='some-db' sslmode='verify-full'",
 		},
 		{
 			description: "with unix socket host",
 			input: &Postgres{
-				Host: "/var/run/postgres",
-				SSL: PostgresSSL{
+				NetworkDB: NetworkDB{
+					Host: "/var/run/postgres",
+				},
+				SSL: SSL{
 					Mode: "disable",
 				},
 			},
@@ -112,8 +134,10 @@ func TestCreateDataSourceName(t *testing.T) {
 		{
 			description: "with tcp host",
 			input: &Postgres{
-				Host: "coreos.com",
-				SSL: PostgresSSL{
+				NetworkDB: NetworkDB{
+					Host: "coreos.com",
+				},
+				SSL: SSL{
 					Mode: "disable",
 				},
 			},
@@ -122,23 +146,29 @@ func TestCreateDataSourceName(t *testing.T) {
 		{
 			description: "with tcp host:port",
 			input: &Postgres{
-				Host: "coreos.com:6543",
+				NetworkDB: NetworkDB{
+					Host: "coreos.com:6543",
+				},
 			},
 			expected: "connect_timeout=0 host='coreos.com' port=6543 sslmode='verify-full'",
 		},
 		{
 			description: "with tcp host and port",
 			input: &Postgres{
-				Host: "coreos.com",
-				Port: 6543,
+				NetworkDB: NetworkDB{
+					Host: "coreos.com",
+					Port: 6543,
+				},
 			},
 			expected: "connect_timeout=0 host='coreos.com' port=6543 sslmode='verify-full'",
 		},
 		{
 			description: "with ssl ca cert",
 			input: &Postgres{
-				Host: "coreos.com",
-				SSL: PostgresSSL{
+				NetworkDB: NetworkDB{
+					Host: "coreos.com",
+				},
+				SSL: SSL{
 					Mode:   "verify-ca",
 					CAFile: "/some/file/path",
 				},
@@ -148,8 +178,10 @@ func TestCreateDataSourceName(t *testing.T) {
 		{
 			description: "with ssl client cert",
 			input: &Postgres{
-				Host: "coreos.com",
-				SSL: PostgresSSL{
+				NetworkDB: NetworkDB{
+					Host: "coreos.com",
+				},
+				SSL: SSL{
 					Mode:     "verify-ca",
 					CAFile:   "/some/ca/path",
 					CertFile: "/some/cert/path",
@@ -161,9 +193,11 @@ func TestCreateDataSourceName(t *testing.T) {
 		{
 			description: "with funny characters in credentials",
 			input: &Postgres{
-				Host:     "coreos.com",
-				User:     `some'user\slashed`,
-				Password: "some'password!",
+				NetworkDB: NetworkDB{
+					Host:     "coreos.com",
+					User:     `some'user\slashed`,
+					Password: "some'password!",
+				},
 			},
 			expected: `connect_timeout=0 host='coreos.com' user='some\'user\\slashed' password='some\'password!' sslmode='verify-full'`,
 		},
@@ -186,37 +220,42 @@ func TestPostgres(t *testing.T) {
 	if host == "" {
 		t.Skipf("test environment variable %q not set, skipping", testPostgresEnv)
 	}
-	p := Postgres{
-		Database: getenv("DEX_POSTGRES_DATABASE", "postgres"),
-		User:     getenv("DEX_POSTGRES_USER", "postgres"),
-		Password: getenv("DEX_POSTGRES_PASSWORD", "postgres"),
-		Host:     host,
-		SSL: PostgresSSL{
-			Mode: sslDisable, // Postgres container doesn't support SSL.
+	p := &Postgres{
+		NetworkDB: NetworkDB{
+			Database:          getenv("DEX_POSTGRES_DATABASE", "postgres"),
+			User:              getenv("DEX_POSTGRES_USER", "postgres"),
+			Password:          getenv("DEX_POSTGRES_PASSWORD", "postgres"),
+			Host:              host,
+			ConnectionTimeout: 5,
+		},
+		SSL: SSL{
+			Mode: pgSSLDisable, // Postgres container doesn't support SSL.
 		},
-		ConnectionTimeout: 5,
 	}
+	testDB(t, p, true)
+}
 
-	// t.Fatal has a bad habbit of not actually printing the error
-	fatal := func(i interface{}) {
-		fmt.Fprintln(os.Stdout, i)
-		t.Fatal(i)
+const testMySQLEnv = "DEX_MYSQL_HOST"
+
+func TestMySQL(t *testing.T) {
+	host := os.Getenv(testMySQLEnv)
+	if host == "" {
+		t.Skipf("test environment variable %q not set, skipping", testMySQLEnv)
 	}
-
-	newStorage := func() storage.Storage {
-		conn, err := p.open(logger, p.createDataSourceName())
-		if err != nil {
-			fatal(err)
-		}
-		if err := cleanDB(conn); err != nil {
-			fatal(err)
-		}
-		return conn
+	s := &MySQL{
+		NetworkDB: NetworkDB{
+			Database:          getenv("DEX_MYSQL_DATABASE", "mysql"),
+			User:              getenv("DEX_MYSQL_USER", "mysql"),
+			Password:          getenv("DEX_MYSQL_PASSWORD", ""),
+			Host:              host,
+			ConnectionTimeout: 5,
+		},
+		SSL: SSL{
+			Mode: mysqlSSLFalse,
+		},
+		params: map[string]string{
+			"innodb_lock_wait_timeout": "3",
+		},
 	}
-	withTimeout(time.Minute*1, func() {
-		conformance.RunTests(t, newStorage)
-	})
-	withTimeout(time.Minute*1, func() {
-		conformance.RunTransactionTests(t, newStorage)
-	})
+	testDB(t, s, true)
 }

storage/sql/migrate.go

@@ -38,8 +38,10 @@ func (c *conn) migrate() (int, error) {
 
 			migrationNum := n + 1
 			m := migrations[n]
-			if _, err := tx.Exec(m.stmt); err != nil {
-				return fmt.Errorf("migration %d failed: %v", migrationNum, err)
+			for i := range m.stmts {
+				if _, err := tx.Exec(m.stmts[i]); err != nil {
+					return fmt.Errorf("migration %d statement %d failed: %v", migrationNum, i+1, err)
+				}
 			}
 
 			q := `insert into migrations (num, at) values ($1, now());`
@@ -61,14 +63,14 @@ func (c *conn) migrate() (int, error) {
 }
 
 type migration struct {
-	stmt string
+	stmts []string
 	// TODO(ericchiang): consider adding additional fields like "forDrivers"
 }
 
 // All SQL flavors share migration strategies.
 var migrations = []migration{
 	{
-		stmt: `
+		stmts: []string{`
 			create table client (
 				id text not null primary key,
 				secret text not null,
@@ -77,8 +79,8 @@ var migrations = []migration{
 				public boolean not null,
 				name text not null,
 				logo_url text not null
-			);
-		
+			);`,
+			`
 			create table auth_request (
 				id text not null primary key,
 				client_id text not null,
@@ -101,8 +103,8 @@ var migrations = []migration{
 				connector_data bytea,
 		
 				expiry timestamptz not null
-			);
-		
+			);`,
+			`
 			create table auth_code (
 				id text not null primary key,
 				client_id text not null,
@@ -120,8 +122,8 @@ var migrations = []migration{
 				connector_data bytea,
 		
 				expiry timestamptz not null
-			);
-		
+			);`,
+			`
 			create table refresh_token (
 				id text not null primary key,
 				client_id text not null,
@@ -136,15 +138,15 @@ var migrations = []migration{
 		
 				connector_id text not null,
 				connector_data bytea
-			);
-
+			);`,
+			`
 			create table password (
 				email text not null primary key,
 				hash bytea not null,
 				username text not null,
 				user_id text not null
-			);
-		
+			);`,
+			`
 			-- keys is a weird table because we only ever expect there to be a single row
 			create table keys (
 				id text not null primary key,
@@ -152,39 +154,40 @@ var migrations = []migration{
 				signing_key bytea not null,       -- JSON object
 				signing_key_pub bytea not null,   -- JSON object
 				next_rotation timestamptz not null
-			);
-
-		`,
+			);`,
+		},
 	},
 	{
-		stmt: `
+		stmts: []string{`
 			alter table refresh_token
-				add column token text not null default '';
+				add column token text not null default '';`,
+			`
 			alter table refresh_token
-				add column created_at timestamptz not null default '0001-01-01 00:00:00 UTC';
+				add column created_at timestamptz not null default '0001-01-01 00:00:00 UTC';`,
+			`
 			alter table refresh_token
-				add column last_used timestamptz not null default '0001-01-01 00:00:00 UTC';
-		`,
+				add column last_used timestamptz not null default '0001-01-01 00:00:00 UTC';`,
+		},
 	},
 	{
-		stmt: `
+		stmts: []string{`
 			create table offline_session (
 				user_id text not null,
 				conn_id text not null,
 				refresh bytea not null,
 				PRIMARY KEY (user_id, conn_id)
-			);
-		`,
+			);`,
+		},
 	},
 	{
-		stmt: `
+		stmts: []string{`
 			create table connector (
 				id text not null primary key,
 				type text not null,
 				name text not null,
 				resource_version text not null,
 				config bytea
-			);
-		`,
+			);`,
+		},
 	},
 }

storage/sql/postgres_test.go

@@ -13,17 +13,19 @@ func TestPostgresTunables(t *testing.T) {
 		t.Skipf("test environment variable %q not set, skipping", testPostgresEnv)
 	}
 	baseCfg := &Postgres{
-		Database: getenv("DEX_POSTGRES_DATABASE", "postgres"),
-		User:     getenv("DEX_POSTGRES_USER", "postgres"),
-		Password: getenv("DEX_POSTGRES_PASSWORD", "postgres"),
-		Host:     host,
-		SSL: PostgresSSL{
-			Mode: sslDisable, // Postgres container doesn't support SSL.
+		NetworkDB: NetworkDB{
+			Database: getenv("DEX_POSTGRES_DATABASE", "postgres"),
+			User:     getenv("DEX_POSTGRES_USER", "postgres"),
+			Password: getenv("DEX_POSTGRES_PASSWORD", "postgres"),
+			Host:     host,
+		},
+		SSL: SSL{
+			Mode: pgSSLDisable, // Postgres container doesn't support SSL.
 		}}
 
 	t.Run("with nothing set, uses defaults", func(t *testing.T) {
 		cfg := *baseCfg
-		c, err := cfg.open(logger, cfg.createDataSourceName())
+		c, err := cfg.open(logger)
 		if err != nil {
 			t.Fatalf("error opening connector: %s", err.Error())
 		}
@@ -36,7 +38,7 @@ func TestPostgresTunables(t *testing.T) {
 	t.Run("with something set, uses that", func(t *testing.T) {
 		cfg := *baseCfg
 		cfg.MaxOpenConns = 101
-		c, err := cfg.open(logger, cfg.createDataSourceName())
+		c, err := cfg.open(logger)
 		if err != nil {
 			t.Fatalf("error opening connector: %s", err.Error())
 		}

storage/sql/sql.go

@@ -83,6 +83,24 @@ var (
 			{regexp.MustCompile(`\bnow\(\)`), "date('now')"},
 		},
 	}
+
+	flavorMySQL = flavor{
+		queryReplacers: []replacer{
+			{bindRegexp, "?"},
+			// Translate types.
+			{matchLiteral("bytea"), "blob"},
+			{matchLiteral("timestamptz"), "datetime(3)"},
+			// MySQL doesn't support indicies on text fields w/o
+			// specifying key length. Use varchar instead (767 byte
+			// is the max key length for InnoDB with 4k pages).
+			// For compound indexes (with two keys) even less.
+			{matchLiteral("text"), "varchar(384)"},
+			// Quote keywords and reserved words used as identifiers.
+			{regexp.MustCompile(`\b(keys)\b`), "`$1`"},
+			// Change default timestamp to fit datetime.
+			{regexp.MustCompile(`0001-01-01 00:00:00 UTC`), "1000-01-01 00:00:00"},
+		},
+	}
 )
 
 func (f flavor) translate(query string) string {

vendor/github.com/go-sql-driver/mysql/.gitignore

@@ -0,0 +1,9 @@
+.DS_Store
+.DS_Store?
+._*
+.Spotlight-V100
+.Trashes
+Icon?
+ehthumbs.db
+Thumbs.db
+.idea

vendor/github.com/go-sql-driver/mysql/.travis.yml

@@ -0,0 +1,107 @@
+sudo: false
+language: go
+go:
+  - 1.7.x
+  - 1.8.x
+  - 1.9.x
+  - 1.10.x
+  - master
+
+before_install:
+  - go get golang.org/x/tools/cmd/cover
+  - go get github.com/mattn/goveralls
+
+before_script:
+  - echo -e "[server]\ninnodb_log_file_size=256MB\ninnodb_buffer_pool_size=512MB\nmax_allowed_packet=16MB" | sudo tee -a /etc/mysql/my.cnf
+  - sudo service mysql restart
+  - .travis/wait_mysql.sh
+  - mysql -e 'create database gotest;'
+
+matrix:
+  include:
+    - env: DB=MYSQL8
+      sudo: required
+      dist: trusty
+      go: 1.10.x
+      services:
+        - docker
+      before_install:
+        - go get golang.org/x/tools/cmd/cover
+        - go get github.com/mattn/goveralls
+        - docker pull mysql:8.0
+        - docker run -d -p 127.0.0.1:3307:3306 --name mysqld -e MYSQL_DATABASE=gotest -e MYSQL_USER=gotest -e MYSQL_PASSWORD=secret -e MYSQL_ROOT_PASSWORD=verysecret
+          mysql:8.0 --innodb_log_file_size=256MB --innodb_buffer_pool_size=512MB --max_allowed_packet=16MB --local-infile=1
+        - cp .travis/docker.cnf ~/.my.cnf
+        - .travis/wait_mysql.sh
+      before_script:
+        - export MYSQL_TEST_USER=gotest
+        - export MYSQL_TEST_PASS=secret
+        - export MYSQL_TEST_ADDR=127.0.0.1:3307
+        - export MYSQL_TEST_CONCURRENT=1
+
+    - env: DB=MYSQL57
+      sudo: required
+      dist: trusty
+      go: 1.10.x
+      services:
+        - docker
+      before_install:
+        - go get golang.org/x/tools/cmd/cover
+        - go get github.com/mattn/goveralls
+        - docker pull mysql:5.7
+        - docker run -d -p 127.0.0.1:3307:3306 --name mysqld -e MYSQL_DATABASE=gotest -e MYSQL_USER=gotest -e MYSQL_PASSWORD=secret -e MYSQL_ROOT_PASSWORD=verysecret
+          mysql:5.7 --innodb_log_file_size=256MB --innodb_buffer_pool_size=512MB --max_allowed_packet=16MB --local-infile=1
+        - cp .travis/docker.cnf ~/.my.cnf
+        - .travis/wait_mysql.sh
+      before_script:
+        - export MYSQL_TEST_USER=gotest
+        - export MYSQL_TEST_PASS=secret
+        - export MYSQL_TEST_ADDR=127.0.0.1:3307
+        - export MYSQL_TEST_CONCURRENT=1
+
+    - env: DB=MARIA55
+      sudo: required
+      dist: trusty
+      go: 1.10.x
+      services:
+        - docker
+      before_install:
+        - go get golang.org/x/tools/cmd/cover
+        - go get github.com/mattn/goveralls
+        - docker pull mariadb:5.5
+        - docker run -d -p 127.0.0.1:3307:3306 --name mysqld -e MYSQL_DATABASE=gotest -e MYSQL_USER=gotest -e MYSQL_PASSWORD=secret -e MYSQL_ROOT_PASSWORD=verysecret
+          mariadb:5.5 --innodb_log_file_size=256MB --innodb_buffer_pool_size=512MB --max_allowed_packet=16MB --local-infile=1
+        - cp .travis/docker.cnf ~/.my.cnf
+        - .travis/wait_mysql.sh
+      before_script:
+        - export MYSQL_TEST_USER=gotest
+        - export MYSQL_TEST_PASS=secret
+        - export MYSQL_TEST_ADDR=127.0.0.1:3307
+        - export MYSQL_TEST_CONCURRENT=1
+
+    - env: DB=MARIA10_1
+      sudo: required
+      dist: trusty
+      go: 1.10.x
+      services:
+        - docker
+      before_install:
+        - go get golang.org/x/tools/cmd/cover
+        - go get github.com/mattn/goveralls
+        - docker pull mariadb:10.1
+        - docker run -d -p 127.0.0.1:3307:3306 --name mysqld -e MYSQL_DATABASE=gotest -e MYSQL_USER=gotest -e MYSQL_PASSWORD=secret -e MYSQL_ROOT_PASSWORD=verysecret
+          mariadb:10.1 --innodb_log_file_size=256MB --innodb_buffer_pool_size=512MB --max_allowed_packet=16MB --local-infile=1
+        - cp .travis/docker.cnf ~/.my.cnf
+        - .travis/wait_mysql.sh
+      before_script:
+        - export MYSQL_TEST_USER=gotest
+        - export MYSQL_TEST_PASS=secret
+        - export MYSQL_TEST_ADDR=127.0.0.1:3307
+        - export MYSQL_TEST_CONCURRENT=1
+
+script:
+  - go test -v -covermode=count -coverprofile=coverage.out
+  - go vet ./...
+  - .travis/gofmt.sh
+after_script:
+  - $HOME/gopath/bin/goveralls -coverprofile=coverage.out -service=travis-ci

vendor/github.com/go-sql-driver/mysql/AUTHORS

@@ -0,0 +1,89 @@
+# This is the official list of Go-MySQL-Driver authors for copyright purposes.
+
+# If you are submitting a patch, please add your name or the name of the
+# organization which holds the copyright to this list in alphabetical order.
+
+# Names should be added to this file as
+#	Name <email address>
+# The email address is not required for organizations.
+# Please keep the list sorted.
+
+
+# Individual Persons
+
+Aaron Hopkins <go-sql-driver at die.net>
+Achille Roussel <achille.roussel at gmail.com>
+Alexey Palazhchenko <alexey.palazhchenko at gmail.com>
+Andrew Reid <andrew.reid at tixtrack.com>
+Arne Hormann <arnehormann at gmail.com>
+Asta Xie <xiemengjun at gmail.com>
+Bulat Gaifullin <gaifullinbf at gmail.com>
+Carlos Nieto <jose.carlos at menteslibres.net>
+Chris Moos <chris at tech9computers.com>
+Craig Wilson <craiggwilson at gmail.com>
+Daniel Montoya <dsmontoyam at gmail.com>
+Daniel Nichter <nil at codenode.com>
+Daniël van Eeden <git at myname.nl>
+Dave Protasowski <dprotaso at gmail.com>
+DisposaBoy <disposaboy at dby.me>
+Egor Smolyakov <egorsmkv at gmail.com>
+Evan Shaw <evan at vendhq.com>
+Frederick Mayle <frederickmayle at gmail.com>
+Gustavo Kristic <gkristic at gmail.com>
+Hajime Nakagami <nakagami at gmail.com>
+Hanno Braun <mail at hannobraun.com>
+Henri Yandell <flamefew at gmail.com>
+Hirotaka Yamamoto <ymmt2005 at gmail.com>
+ICHINOSE Shogo <shogo82148 at gmail.com>
+INADA Naoki <songofacandy at gmail.com>
+Jacek Szwec <szwec.jacek at gmail.com>
+James Harr <james.harr at gmail.com>
+Jeff Hodges <jeff at somethingsimilar.com>
+Jeffrey Charles <jeffreycharles at gmail.com>
+Jian Zhen <zhenjl at gmail.com>
+Joshua Prunier <joshua.prunier at gmail.com>
+Julien Lefevre <julien.lefevr at gmail.com>
+Julien Schmidt <go-sql-driver at julienschmidt.com>
+Justin Li <jli at j-li.net>
+Justin Nuß <nuss.justin at gmail.com>
+Kamil Dziedzic <kamil at klecza.pl>
+Kevin Malachowski <kevin at chowski.com>
+Kieron Woodhouse <kieron.woodhouse at infosum.com>
+Lennart Rudolph <lrudolph at hmc.edu>
+Leonardo YongUk Kim <dalinaum at gmail.com>
+Linh Tran Tuan <linhduonggnu at gmail.com>
+Lion Yang <lion at aosc.xyz>
+Luca Looz <luca.looz92 at gmail.com>
+Lucas Liu <extrafliu at gmail.com>
+Luke Scott <luke at webconnex.com>
+Maciej Zimnoch <maciej.zimnoch at codilime.com>
+Michael Woolnough <michael.woolnough at gmail.com>
+Nicola Peduzzi <thenikso at gmail.com>
+Olivier Mengué <dolmen at cpan.org>
+oscarzhao <oscarzhaosl at gmail.com>
+Paul Bonser <misterpib at gmail.com>
+Peter Schultz <peter.schultz at classmarkets.com>
+Rebecca Chin <rchin at pivotal.io>
+Reed Allman <rdallman10 at gmail.com>
+Richard Wilkes <wilkes at me.com>
+Robert Russell <robert at rrbrussell.com>
+Runrioter Wung <runrioter at gmail.com>
+Shuode Li <elemount at qq.com>
+Soroush Pour <me at soroushjp.com>
+Stan Putrya <root.vagner at gmail.com>
+Stanley Gunawan <gunawan.stanley at gmail.com>
+Xiangyu Hu <xiangyu.hu at outlook.com>
+Xiaobing Jiang <s7v7nislands at gmail.com>
+Xiuming Chen <cc at cxm.cc>
+Zhenye Xie <xiezhenye at gmail.com>
+
+# Organizations
+
+Barracuda Networks, Inc.
+Counting Ltd.
+Google Inc.
+InfoSum Ltd.
+Keybase Inc.
+Percona LLC
+Pivotal Inc.
+Stripe Inc.

vendor/github.com/go-sql-driver/mysql/CHANGELOG.md

@@ -0,0 +1,178 @@
+## Version 1.4.1 (2018-11-14)
+
+Bugfixes:
+
+ - Fix TIME format for binary columns (#818)
+ - Fix handling of empty auth plugin names (#835)
+ - Fix caching_sha2_password with empty password (#826)
+ - Fix canceled context broke mysqlConn (#862)
+ - Fix OldAuthSwitchRequest support (#870)
+ - Fix Auth Response packet for cleartext password (#887)
+
+## Version 1.4 (2018-06-03)
+
+Changes:
+
+ - Documentation fixes (#530, #535, #567)
+ - Refactoring (#575, #579, #580, #581, #603, #615, #704)
+ - Cache column names (#444)
+ - Sort the DSN parameters in DSNs generated from a config (#637)
+ - Allow native password authentication by default (#644)
+ - Use the default port if it is missing in the DSN (#668)
+ - Removed the `strict` mode (#676)
+ - Do not query `max_allowed_packet` by default (#680)
+ - Dropped support Go 1.6 and lower (#696)
+ - Updated `ConvertValue()` to match the database/sql/driver implementation (#760)
+ - Document the usage of `0000-00-00T00:00:00` as the time.Time zero value (#783)
+ - Improved the compatibility of the authentication system (#807)
+
+New Features:
+
+ - Multi-Results support (#537)
+ - `rejectReadOnly` DSN option (#604)
+ - `context.Context` support (#608, #612, #627, #761)
+ - Transaction isolation level support (#619, #744)
+ - Read-Only transactions support (#618, #634)
+ - `NewConfig` function which initializes a config with default values (#679)
+ - Implemented the `ColumnType` interfaces (#667, #724)
+ - Support for custom string types in `ConvertValue` (#623)
+ - Implemented `NamedValueChecker`, improving support for uint64 with high bit set (#690, #709, #710)
+ - `caching_sha2_password` authentication plugin support (#794, #800, #801, #802)
+ - Implemented `driver.SessionResetter` (#779)
+ - `sha256_password` authentication plugin support (#808)
+
+Bugfixes:
+
+ - Use the DSN hostname as TLS default ServerName if `tls=true` (#564, #718)
+ - Fixed LOAD LOCAL DATA INFILE for empty files (#590)
+ - Removed columns definition cache since it sometimes cached invalid data (#592)
+ - Don't mutate registered TLS configs (#600)
+ - Make RegisterTLSConfig concurrency-safe (#613)
+ - Handle missing auth data in the handshake packet correctly (#646)
+ - Do not retry queries when data was written to avoid data corruption (#302, #736)
+ - Cache the connection pointer for error handling before invalidating it (#678)
+ - Fixed imports for appengine/cloudsql (#700)
+ - Fix sending STMT_LONG_DATA for 0 byte data (#734)
+ - Set correct capacity for []bytes read from length-encoded strings (#766)
+ - Make RegisterDial concurrency-safe (#773)
+
+
+## Version 1.3 (2016-12-01)
+
+Changes:
+
+ - Go 1.1 is no longer supported
+ - Use decimals fields in MySQL to format time types (#249)
+ - Buffer optimizations (#269)
+ - TLS ServerName defaults to the host (#283)
+ - Refactoring (#400, #410, #437)
+ - Adjusted documentation for second generation CloudSQL (#485)
+ - Documented DSN system var quoting rules (#502)
+ - Made statement.Close() calls idempotent to avoid errors in Go 1.6+ (#512)
+
+New Features:
+
+ - Enable microsecond resolution on TIME, DATETIME and TIMESTAMP (#249)
+ - Support for returning table alias on Columns() (#289, #359, #382)
+ - Placeholder interpolation, can be actived with the DSN parameter `interpolateParams=true` (#309, #318, #490)
+ - Support for uint64 parameters with high bit set (#332, #345)
+ - Cleartext authentication plugin support (#327)
+ - Exported ParseDSN function and the Config struct (#403, #419, #429)
+ - Read / Write timeouts (#401)
+ - Support for JSON field type (#414)
+ - Support for multi-statements and multi-results (#411, #431)
+ - DSN parameter to set the driver-side max_allowed_packet value manually (#489)
+ - Native password authentication plugin support (#494, #524)
+
+Bugfixes:
+
+ - Fixed handling of queries without columns and rows (#255)
+ - Fixed a panic when SetKeepAlive() failed (#298)
+ - Handle ERR packets while reading rows (#321)
+ - Fixed reading NULL length-encoded integers in MySQL 5.6+ (#349)
+ - Fixed absolute paths support in LOAD LOCAL DATA INFILE (#356)
+ - Actually zero out bytes in handshake response (#378)
+ - Fixed race condition in registering LOAD DATA INFILE handler (#383)
+ - Fixed tests with MySQL 5.7.9+ (#380)
+ - QueryUnescape TLS config names (#397)
+ - Fixed "broken pipe" error by writing to closed socket (#390)
+ - Fixed LOAD LOCAL DATA INFILE buffering (#424)
+ - Fixed parsing of floats into float64 when placeholders are used (#434)
+ - Fixed DSN tests with Go 1.7+ (#459)
+ - Handle ERR packets while waiting for EOF (#473)
+ - Invalidate connection on error while discarding additional results (#513)
+ - Allow terminating packets of length 0 (#516)
+
+
+## Version 1.2 (2014-06-03)
+
+Changes:
+
+ - We switched back to a "rolling release". `go get` installs the current master branch again
+ - Version v1 of the driver will not be maintained anymore. Go 1.0 is no longer supported by this driver
+ - Exported errors to allow easy checking from application code
+ - Enabled TCP Keepalives on TCP connections
+ - Optimized INFILE handling (better buffer size calculation, lazy init, ...)
+ - The DSN parser also checks for a missing separating slash
+ - Faster binary date / datetime to string formatting
+ - Also exported the MySQLWarning type
+ - mysqlConn.Close returns the first error encountered instead of ignoring all errors
+ - writePacket() automatically writes the packet size to the header
+ - readPacket() uses an iterative approach instead of the recursive approach to merge splitted packets
+
+New Features:
+
+ - `RegisterDial` allows the usage of a custom dial function to establish the network connection
+ - Setting the connection collation is possible with the `collation` DSN parameter. This parameter should be preferred over the `charset` parameter
+ - Logging of critical errors is configurable with `SetLogger`
+ - Google CloudSQL support
+
+Bugfixes:
+
+ - Allow more than 32 parameters in prepared statements
+ - Various old_password fixes
+ - Fixed TestConcurrent test to pass Go's race detection
+ - Fixed appendLengthEncodedInteger for large numbers
+ - Renamed readLengthEnodedString to readLengthEncodedString and skipLengthEnodedString to skipLengthEncodedString (fixed typo)
+
+
+## Version 1.1 (2013-11-02)
+
+Changes:
+
+  - Go-MySQL-Driver now requires Go 1.1
+  - Connections now use the collation `utf8_general_ci` by default. Adding `&charset=UTF8` to the DSN should not be necessary anymore
+  - Made closing rows and connections error tolerant. This allows for example deferring rows.Close() without checking for errors
+  - `[]byte(nil)` is now treated as a NULL value. Before, it was treated like an empty string / `[]byte("")`
+  - DSN parameter values must now be url.QueryEscape'ed. This allows text values to contain special characters, such as '&'.
+  - Use the IO buffer also for writing. This results in zero allocations (by the driver) for most queries
+  - Optimized the buffer for reading
+  - stmt.Query now caches column metadata
+  - New Logo
+  - Changed the copyright header to include all contributors
+  - Improved the LOAD INFILE documentation
+  - The driver struct is now exported to make the driver directly accessible
+  - Refactored the driver tests
+  - Added more benchmarks and moved all to a separate file
+  - Other small refactoring
+
+New Features:
+
+  - Added *old_passwords* support: Required in some cases, but must be enabled by adding `allowOldPasswords=true` to the DSN since it is insecure
+  - Added a `clientFoundRows` parameter: Return the number of matching rows instead of the number of rows changed on UPDATEs
+  - Added TLS/SSL support: Use a TLS/SSL encrypted connection to the server. Custom TLS configs can be registered and used
+
+Bugfixes:
+
+  - Fixed MySQL 4.1 support: MySQL 4.1 sends packets with lengths which differ from the specification
+  - Convert to DB timezone when inserting `time.Time`
+  - Splitted packets (more than 16MB) are now merged correctly
+  - Fixed false positive `io.EOF` errors when the data was fully read
+  - Avoid panics on reuse of closed connections
+  - Fixed empty string producing false nil values
+  - Fixed sign byte for positive TIME fields
+
+
+## Version 1.0 (2013-05-14)
+
+Initial Release

vendor/github.com/go-sql-driver/mysql/CONTRIBUTING.md

@@ -0,0 +1,23 @@
+# Contributing Guidelines
+
+## Reporting Issues
+
+Before creating a new Issue, please check first if a similar Issue [already exists](https://github.com/go-sql-driver/mysql/issues?state=open) or was [recently closed](https://github.com/go-sql-driver/mysql/issues?direction=desc&page=1&sort=updated&state=closed).
+
+## Contributing Code
+
+By contributing to this project, you share your code under the Mozilla Public License 2, as specified in the LICENSE file.
+Don't forget to add yourself to the AUTHORS file.
+
+### Code Review
+
+Everyone is invited to review and comment on pull requests.
+If it looks fine to you, comment with "LGTM" (Looks good to me).
+
+If changes are required, notice the reviewers with "PTAL" (Please take another look) after committing the fixes.
+
+Before merging the Pull Request, at least one [team member](https://github.com/go-sql-driver?tab=members) must have commented with "LGTM".
+
+## Development Ideas
+
+If you are looking for ideas for code contributions, please check our [Development Ideas](https://github.com/go-sql-driver/mysql/wiki/Development-Ideas) Wiki page.

vendor/github.com/go-sql-driver/mysql/LICENSE

@@ -0,0 +1,373 @@
+Mozilla Public License Version 2.0
+==================================
+
+1. Definitions
+--------------
+
+1.1. "Contributor"
+    means each individual or legal entity that creates, contributes to
+    the creation of, or owns Covered Software.
+
+1.2. "Contributor Version"
+    means the combination of the Contributions of others (if any) used
+    by a Contributor and that particular Contributor's Contribution.
+
+1.3. "Contribution"
+    means Covered Software of a particular Contributor.
+
+1.4. "Covered Software"
+    means Source Code Form to which the initial Contributor has attached
+    the notice in Exhibit A, the Executable Form of such Source Code
+    Form, and Modifications of such Source Code Form, in each case
+    including portions thereof.
+
+1.5. "Incompatible With Secondary Licenses"
+    means
+
+    (a) that the initial Contributor has attached the notice described
+        in Exhibit B to the Covered Software; or
+
+    (b) that the Covered Software was made available under the terms of
+        version 1.1 or earlier of the License, but not also under the
+        terms of a Secondary License.
+
+1.6. "Executable Form"
+    means any form of the work other than Source Code Form.
+
+1.7. "Larger Work"
+    means a work that combines Covered Software with other material, in 
+    a separate file or files, that is not Covered Software.
+
+1.8. "License"
+    means this document.
+
+1.9. "Licensable"
+    means having the right to grant, to the maximum extent possible,
+    whether at the time of the initial grant or subsequently, any and
+    all of the rights conveyed by this License.
+
+1.10. "Modifications"
+    means any of the following:
+
+    (a) any file in Source Code Form that results from an addition to,
+        deletion from, or modification of the contents of Covered
+        Software; or
+
+    (b) any new file in Source Code Form that contains any Covered
+        Software.
+
+1.11. "Patent Claims" of a Contributor
+    means any patent claim(s), including without limitation, method,
+    process, and apparatus claims, in any patent Licensable by such
+    Contributor that would be infringed, but for the grant of the
+    License, by the making, using, selling, offering for sale, having
+    made, import, or transfer of either its Contributions or its
+    Contributor Version.
+
+1.12. "Secondary License"
+    means either the GNU General Public License, Version 2.0, the GNU
+    Lesser General Public License, Version 2.1, the GNU Affero General
+    Public License, Version 3.0, or any later versions of those
+    licenses.
+
+1.13. "Source Code Form"
+    means the form of the work preferred for making modifications.
+
+1.14. "You" (or "Your")
+    means an individual or a legal entity exercising rights under this
+    License. For legal entities, "You" includes any entity that
+    controls, is controlled by, or is under common control with You. For
+    purposes of this definition, "control" means (a) the power, direct
+    or indirect, to cause the direction or management of such entity,
+    whether by contract or otherwise, or (b) ownership of more than
+    fifty percent (50%) of the outstanding shares or beneficial
+    ownership of such entity.
+
+2. License Grants and Conditions
+--------------------------------
+
+2.1. Grants
+
+Each Contributor hereby grants You a world-wide, royalty-free,
+non-exclusive license:
+
+(a) under intellectual property rights (other than patent or trademark)
+    Licensable by such Contributor to use, reproduce, make available,
+    modify, display, perform, distribute, and otherwise exploit its
+    Contributions, either on an unmodified basis, with Modifications, or
+    as part of a Larger Work; and
+
+(b) under Patent Claims of such Contributor to make, use, sell, offer
+    for sale, have made, import, and otherwise transfer either its
+    Contributions or its Contributor Version.
+
+2.2. Effective Date
+
+The licenses granted in Section 2.1 with respect to any Contribution
+become effective for each Contribution on the date the Contributor first
+distributes such Contribution.
+
+2.3. Limitations on Grant Scope
+
+The licenses granted in this Section 2 are the only rights granted under
+this License. No additional rights or licenses will be implied from the
+distribution or licensing of Covered Software under this License.
+Notwithstanding Section 2.1(b) above, no patent license is granted by a
+Contributor:
+
+(a) for any code that a Contributor has removed from Covered Software;
+    or
+
+(b) for infringements caused by: (i) Your and any other third party's
+    modifications of Covered Software, or (ii) the combination of its
+    Contributions with other software (except as part of its Contributor
+    Version); or
+
+(c) under Patent Claims infringed by Covered Software in the absence of
+    its Contributions.
+
+This License does not grant any rights in the trademarks, service marks,
+or logos of any Contributor (except as may be necessary to comply with
+the notice requirements in Section 3.4).
+
+2.4. Subsequent Licenses
+
+No Contributor makes additional grants as a result of Your choice to
+distribute the Covered Software under a subsequent version of this
+License (see Section 10.2) or under the terms of a Secondary License (if
+permitted under the terms of Section 3.3).
+
+2.5. Representation
+
+Each Contributor represents that the Contributor believes its
+Contributions are its original creation(s) or it has sufficient rights
+to grant the rights to its Contributions conveyed by this License.
+
+2.6. Fair Use
+
+This License is not intended to limit any rights You have under
+applicable copyright doctrines of fair use, fair dealing, or other
+equivalents.
+
+2.7. Conditions
+
+Sections 3.1, 3.2, 3.3, and 3.4 are conditions of the licenses granted
+in Section 2.1.
+
+3. Responsibilities
+-------------------
+
+3.1. Distribution of Source Form
+
+All distribution of Covered Software in Source Code Form, including any
+Modifications that You create or to which You contribute, must be under
+the terms of this License. You must inform recipients that the Source
+Code Form of the Covered Software is governed by the terms of this
+License, and how they can obtain a copy of this License. You may not
+attempt to alter or restrict the recipients' rights in the Source Code
+Form.
+
+3.2. Distribution of Executable Form
+
+If You distribute Covered Software in Executable Form then:
+
+(a) such Covered Software must also be made available in Source Code
+    Form, as described in Section 3.1, and You must inform recipients of
+    the Executable Form how they can obtain a copy of such Source Code
+    Form by reasonable means in a timely manner, at a charge no more
+    than the cost of distribution to the recipient; and
+
+(b) You may distribute such Executable Form under the terms of this
+    License, or sublicense it under different terms, provided that the
+    license for the Executable Form does not attempt to limit or alter
+    the recipients' rights in the Source Code Form under this License.
+
+3.3. Distribution of a Larger Work
+
+You may create and distribute a Larger Work under terms of Your choice,
+provided that You also comply with the requirements of this License for
+the Covered Software. If the Larger Work is a combination of Covered
+Software with a work governed by one or more Secondary Licenses, and the
+Covered Software is not Incompatible With Secondary Licenses, this
+License permits You to additionally distribute such Covered Software
+under the terms of such Secondary License(s), so that the recipient of
+the Larger Work may, at their option, further distribute the Covered
+Software under the terms of either this License or such Secondary
+License(s).
+
+3.4. Notices
+
+You may not remove or alter the substance of any license notices
+(including copyright notices, patent notices, disclaimers of warranty,
+or limitations of liability) contained within the Source Code Form of
+the Covered Software, except that You may alter any license notices to
+the extent required to remedy known factual inaccuracies.
+
+3.5. Application of Additional Terms
+
+You may choose to offer, and to charge a fee for, warranty, support,
+indemnity or liability obligations to one or more recipients of Covered
+Software. However, You may do so only on Your own behalf, and not on
+behalf of any Contributor. You must make it absolutely clear that any
+such warranty, support, indemnity, or liability obligation is offered by
+You alone, and You hereby agree to indemnify every Contributor for any
+liability incurred by such Contributor as a result of warranty, support,
+indemnity or liability terms You offer. You may include additional
+disclaimers of warranty and limitations of liability specific to any
+jurisdiction.
+
+4. Inability to Comply Due to Statute or Regulation
+---------------------------------------------------
+
+If it is impossible for You to comply with any of the terms of this
+License with respect to some or all of the Covered Software due to
+statute, judicial order, or regulation then You must: (a) comply with
+the terms of this License to the maximum extent possible; and (b)
+describe the limitations and the code they affect. Such description must
+be placed in a text file included with all distributions of the Covered
+Software under this License. Except to the extent prohibited by statute
+or regulation, such description must be sufficiently detailed for a
+recipient of ordinary skill to be able to understand it.
+
+5. Termination
+--------------
+
+5.1. The rights granted under this License will terminate automatically
+if You fail to comply with any of its terms. However, if You become
+compliant, then the rights granted under this License from a particular
+Contributor are reinstated (a) provisionally, unless and until such
+Contributor explicitly and finally terminates Your grants, and (b) on an
+ongoing basis, if such Contributor fails to notify You of the
+non-compliance by some reasonable means prior to 60 days after You have
+come back into compliance. Moreover, Your grants from a particular
+Contributor are reinstated on an ongoing basis if such Contributor
+notifies You of the non-compliance by some reasonable means, this is the
+first time You have received notice of non-compliance with this License
+from such Contributor, and You become compliant prior to 30 days after
+Your receipt of the notice.
+
+5.2. If You initiate litigation against any entity by asserting a patent
+infringement claim (excluding declaratory judgment actions,
+counter-claims, and cross-claims) alleging that a Contributor Version
+directly or indirectly infringes any patent, then the rights granted to
+You by any and all Contributors for the Covered Software under Section
+2.1 of this License shall terminate.
+
+5.3. In the event of termination under Sections 5.1 or 5.2 above, all
+end user license agreements (excluding distributors and resellers) which
+have been validly granted by You or Your distributors under this License
+prior to termination shall survive termination.
+
+************************************************************************
+*                                                                      *
+*  6. Disclaimer of Warranty                                           *
+*  -------------------------                                           *
+*                                                                      *
+*  Covered Software is provided under this License on an "as is"       *
+*  basis, without warranty of any kind, either expressed, implied, or  *
+*  statutory, including, without limitation, warranties that the       *
+*  Covered Software is free of defects, merchantable, fit for a        *
+*  particular purpose or non-infringing. The entire risk as to the     *
+*  quality and performance of the Covered Software is with You.        *
+*  Should any Covered Software prove defective in any respect, You     *
+*  (not any Contributor) assume the cost of any necessary servicing,   *
+*  repair, or correction. This disclaimer of warranty constitutes an   *
+*  essential part of this License. No use of any Covered Software is   *
+*  authorized under this License except under this disclaimer.         *
+*                                                                      *
+************************************************************************
+
+************************************************************************
+*                                                                      *
+*  7. Limitation of Liability                                          *
+*  --------------------------                                          *
+*                                                                      *
+*  Under no circumstances and under no legal theory, whether tort      *
+*  (including negligence), contract, or otherwise, shall any           *
+*  Contributor, or anyone who distributes Covered Software as          *
+*  permitted above, be liable to You for any direct, indirect,         *
+*  special, incidental, or consequential damages of any character      *
+*  including, without limitation, damages for lost profits, loss of    *
+*  goodwill, work stoppage, computer failure or malfunction, or any    *
+*  and all other commercial damages or losses, even if such party      *
+*  shall have been informed of the possibility of such damages. This   *
+*  limitation of liability shall not apply to liability for death or   *
+*  personal injury resulting from such party's negligence to the       *
+*  extent applicable law prohibits such limitation. Some               *
+*  jurisdictions do not allow the exclusion or limitation of           *
+*  incidental or consequential damages, so this exclusion and          *
+*  limitation may not apply to You.                                    *
+*                                                                      *
+************************************************************************
+
+8. Litigation
+-------------
+
+Any litigation relating to this License may be brought only in the
+courts of a jurisdiction where the defendant maintains its principal
+place of business and such litigation shall be governed by laws of that
+jurisdiction, without reference to its conflict-of-law provisions.
+Nothing in this Section shall prevent a party's ability to bring
+cross-claims or counter-claims.
+
+9. Miscellaneous
+----------------
+
+This License represents the complete agreement concerning the subject
+matter hereof. If any provision of this License is held to be
+unenforceable, such provision shall be reformed only to the extent
+necessary to make it enforceable. Any law or regulation which provides
+that the language of a contract shall be construed against the drafter
+shall not be used to construe this License against a Contributor.
+
+10. Versions of the License
+---------------------------
+
+10.1. New Versions
+
+Mozilla Foundation is the license steward. Except as provided in Section
+10.3, no one other than the license steward has the right to modify or
+publish new versions of this License. Each version will be given a
+distinguishing version number.
+
+10.2. Effect of New Versions
+
+You may distribute the Covered Software under the terms of the version
+of the License under which You originally received the Covered Software,
+or under the terms of any subsequent version published by the license
+steward.
+
+10.3. Modified Versions
+
+If you create software not governed by this License, and you want to
+create a new license for such software, you may create and use a
+modified version of this License if you rename the license and remove
+any references to the name of the license steward (except to note that
+such modified license differs from this License).
+
+10.4. Distributing Source Code Form that is Incompatible With Secondary
+Licenses
+
+If You choose to distribute Source Code Form that is Incompatible With
+Secondary Licenses under the terms of this version of the License, the
+notice described in Exhibit B of this License must be attached.
+
+Exhibit A - Source Code Form License Notice
+-------------------------------------------
+
+  This Source Code Form is subject to the terms of the Mozilla Public
+  License, v. 2.0. If a copy of the MPL was not distributed with this
+  file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+If it is not possible or desirable to put the notice in a particular
+file, then You may include the notice in a location (such as a LICENSE
+file in a relevant directory) where a recipient would be likely to look
+for such a notice.
+
+You may add additional accurate notices of copyright ownership.
+
+Exhibit B - "Incompatible With Secondary Licenses" Notice
+---------------------------------------------------------
+
+  This Source Code Form is "Incompatible With Secondary Licenses", as
+  defined by the Mozilla Public License, v. 2.0.

vendor/github.com/go-sql-driver/mysql/README.md

@@ -0,0 +1,490 @@
+# Go-MySQL-Driver
+
+A MySQL-Driver for Go's [database/sql](https://golang.org/pkg/database/sql/) package
+
+![Go-MySQL-Driver logo](https://raw.github.com/wiki/go-sql-driver/mysql/gomysql_m.png "Golang Gopher holding the MySQL Dolphin")
+
+---------------------------------------
+  * [Features](#features)
+  * [Requirements](#requirements)
+  * [Installation](#installation)
+  * [Usage](#usage)
+    * [DSN (Data Source Name)](#dsn-data-source-name)
+      * [Password](#password)
+      * [Protocol](#protocol)
+      * [Address](#address)
+      * [Parameters](#parameters)
+      * [Examples](#examples)
+    * [Connection pool and timeouts](#connection-pool-and-timeouts)
+    * [context.Context Support](#contextcontext-support)
+    * [ColumnType Support](#columntype-support)
+    * [LOAD DATA LOCAL INFILE support](#load-data-local-infile-support)
+    * [time.Time support](#timetime-support)
+    * [Unicode support](#unicode-support)
+  * [Testing / Development](#testing--development)
+  * [License](#license)
+
+---------------------------------------
+
+## Features
+  * Lightweight and [fast](https://github.com/go-sql-driver/sql-benchmark "golang MySQL-Driver performance")
+  * Native Go implementation. No C-bindings, just pure Go
+  * Connections over TCP/IPv4, TCP/IPv6, Unix domain sockets or [custom protocols](https://godoc.org/github.com/go-sql-driver/mysql#DialFunc)
+  * Automatic handling of broken connections
+  * Automatic Connection Pooling *(by database/sql package)*
+  * Supports queries larger than 16MB
+  * Full [`sql.RawBytes`](https://golang.org/pkg/database/sql/#RawBytes) support.
+  * Intelligent `LONG DATA` handling in prepared statements
+  * Secure `LOAD DATA LOCAL INFILE` support with file Whitelisting and `io.Reader` support
+  * Optional `time.Time` parsing
+  * Optional placeholder interpolation
+
+## Requirements
+  * Go 1.7 or higher. We aim to support the 3 latest versions of Go.
+  * MySQL (4.1+), MariaDB, Percona Server, Google CloudSQL or Sphinx (2.2.3+)
+
+---------------------------------------
+
+## Installation
+Simple install the package to your [$GOPATH](https://github.com/golang/go/wiki/GOPATH "GOPATH") with the [go tool](https://golang.org/cmd/go/ "go command") from shell:
+```bash
+$ go get -u github.com/go-sql-driver/mysql
+```
+Make sure [Git is installed](https://git-scm.com/downloads) on your machine and in your system's `PATH`.
+
+## Usage
+_Go MySQL Driver_ is an implementation of Go's `database/sql/driver` interface. You only need to import the driver and can use the full [`database/sql`](https://golang.org/pkg/database/sql/) API then.
+
+Use `mysql` as `driverName` and a valid [DSN](#dsn-data-source-name)  as `dataSourceName`:
+```go
+import "database/sql"
+import _ "github.com/go-sql-driver/mysql"
+
+db, err := sql.Open("mysql", "user:password@/dbname")
+```
+
+[Examples are available in our Wiki](https://github.com/go-sql-driver/mysql/wiki/Examples "Go-MySQL-Driver Examples").
+
+
+### DSN (Data Source Name)
+
+The Data Source Name has a common format, like e.g. [PEAR DB](http://pear.php.net/manual/en/package.database.db.intro-dsn.php) uses it, but without type-prefix (optional parts marked by squared brackets):
+```
+[username[:password]@][protocol[(address)]]/dbname[?param1=value1&...&paramN=valueN]
+```
+
+A DSN in its fullest form:
+```
+username:password@protocol(address)/dbname?param=value
+```
+
+Except for the databasename, all values are optional. So the minimal DSN is:
+```
+/dbname
+```
+
+If you do not want to preselect a database, leave `dbname` empty:
+```
+/
+```
+This has the same effect as an empty DSN string:
+```
+
+```
+
+Alternatively, [Config.FormatDSN](https://godoc.org/github.com/go-sql-driver/mysql#Config.FormatDSN) can be used to create a DSN string by filling a struct.
+
+#### Password
+Passwords can consist of any character. Escaping is **not** necessary.
+
+#### Protocol
+See [net.Dial](https://golang.org/pkg/net/#Dial) for more information which networks are available.
+In general you should use an Unix domain socket if available and TCP otherwise for best performance.
+
+#### Address
+For TCP and UDP networks, addresses have the form `host[:port]`.
+If `port` is omitted, the default port will be used.
+If `host` is a literal IPv6 address, it must be enclosed in square brackets.
+The functions [net.JoinHostPort](https://golang.org/pkg/net/#JoinHostPort) and [net.SplitHostPort](https://golang.org/pkg/net/#SplitHostPort) manipulate addresses in this form.
+
+For Unix domain sockets the address is the absolute path to the MySQL-Server-socket, e.g. `/var/run/mysqld/mysqld.sock` or `/tmp/mysql.sock`.
+
+#### Parameters
+*Parameters are case-sensitive!*
+
+Notice that any of `true`, `TRUE`, `True` or `1` is accepted to stand for a true boolean value. Not surprisingly, false can be specified as any of: `false`, `FALSE`, `False` or `0`.
+
+##### `allowAllFiles`
+
+```
+Type:           bool
+Valid Values:   true, false
+Default:        false
+```
+
+`allowAllFiles=true` disables the file Whitelist for `LOAD DATA LOCAL INFILE` and allows *all* files.
+[*Might be insecure!*](http://dev.mysql.com/doc/refman/5.7/en/load-data-local.html)
+
+##### `allowCleartextPasswords`
+
+```
+Type:           bool
+Valid Values:   true, false
+Default:        false
+```
+
+`allowCleartextPasswords=true` allows using the [cleartext client side plugin](http://dev.mysql.com/doc/en/cleartext-authentication-plugin.html) if required by an account, such as one defined with the [PAM authentication plugin](http://dev.mysql.com/doc/en/pam-authentication-plugin.html). Sending passwords in clear text may be a security problem in some configurations. To avoid problems if there is any possibility that the password would be intercepted, clients should connect to MySQL Server using a method that protects the password. Possibilities include [TLS / SSL](#tls), IPsec, or a private network.
+
+##### `allowNativePasswords`
+
+```
+Type:           bool
+Valid Values:   true, false
+Default:        true
+```
+`allowNativePasswords=false` disallows the usage of MySQL native password method.
+
+##### `allowOldPasswords`
+
+```
+Type:           bool
+Valid Values:   true, false
+Default:        false
+```
+`allowOldPasswords=true` allows the usage of the insecure old password method. This should be avoided, but is necessary in some cases. See also [the old_passwords wiki page](https://github.com/go-sql-driver/mysql/wiki/old_passwords).
+
+##### `charset`
+
+```
+Type:           string
+Valid Values:   <name>
+Default:        none
+```
+
+Sets the charset used for client-server interaction (`"SET NAMES <value>"`). If multiple charsets are set (separated by a comma), the following charset is used if setting the charset failes. This enables for example support for `utf8mb4` ([introduced in MySQL 5.5.3](http://dev.mysql.com/doc/refman/5.5/en/charset-unicode-utf8mb4.html)) with fallback to `utf8` for older servers (`charset=utf8mb4,utf8`).
+
+Usage of the `charset` parameter is discouraged because it issues additional queries to the server.
+Unless you need the fallback behavior, please use `collation` instead.
+
+##### `collation`
+
+```
+Type:           string
+Valid Values:   <name>
+Default:        utf8_general_ci
+```
+
+Sets the collation used for client-server interaction on connection. In contrast to `charset`, `collation` does not issue additional queries. If the specified collation is unavailable on the target server, the connection will fail.
+
+A list of valid charsets for a server is retrievable with `SHOW COLLATION`.
+
+##### `clientFoundRows`
+
+```
+Type:           bool
+Valid Values:   true, false
+Default:        false
+```
+
+`clientFoundRows=true` causes an UPDATE to return the number of matching rows instead of the number of rows changed.
+
+##### `columnsWithAlias`
+
+```
+Type:           bool
+Valid Values:   true, false
+Default:        false
+```
+
+When `columnsWithAlias` is true, calls to `sql.Rows.Columns()` will return the table alias and the column name separated by a dot. For example:
+
+```
+SELECT u.id FROM users as u
+```
+
+will return `u.id` instead of just `id` if `columnsWithAlias=true`.
+
+##### `interpolateParams`
+
+```
+Type:           bool
+Valid Values:   true, false
+Default:        false
+```
+
+If `interpolateParams` is true, placeholders (`?`) in calls to `db.Query()` and `db.Exec()` are interpolated into a single query string with given parameters. This reduces the number of roundtrips, since the driver has to prepare a statement, execute it with given parameters and close the statement again with `interpolateParams=false`.
+
+*This can not be used together with the multibyte encodings BIG5, CP932, GB2312, GBK or SJIS. These are blacklisted as they may [introduce a SQL injection vulnerability](http://stackoverflow.com/a/12118602/3430118)!*
+
+##### `loc`
+
+```
+Type:           string
+Valid Values:   <escaped name>
+Default:        UTC
+```
+
+Sets the location for time.Time values (when using `parseTime=true`). *"Local"* sets the system's location. See [time.LoadLocation](https://golang.org/pkg/time/#LoadLocation) for details.
+
+Note that this sets the location for time.Time values but does not change MySQL's [time_zone setting](https://dev.mysql.com/doc/refman/5.5/en/time-zone-support.html). For that see the [time_zone system variable](#system-variables), which can also be set as a DSN parameter.
+
+Please keep in mind, that param values must be [url.QueryEscape](https://golang.org/pkg/net/url/#QueryEscape)'ed. Alternatively you can manually replace the `/` with `%2F`. For example `US/Pacific` would be `loc=US%2FPacific`.
+
+##### `maxAllowedPacket`
+```
+Type:          decimal number
+Default:       4194304
+```
+
+Max packet size allowed in bytes. The default value is 4 MiB and should be adjusted to match the server settings. `maxAllowedPacket=0` can be used to automatically fetch the `max_allowed_packet` variable from server *on every connection*.
+
+##### `multiStatements`
+
+```
+Type:           bool
+Valid Values:   true, false
+Default:        false
+```
+
+Allow multiple statements in one query. While this allows batch queries, it also greatly increases the risk of SQL injections. Only the result of the first query is returned, all other results are silently discarded.
+
+When `multiStatements` is used, `?` parameters must only be used in the first statement.
+
+##### `parseTime`
+
+```
+Type:           bool
+Valid Values:   true, false
+Default:        false
+```
+
+`parseTime=true` changes the output type of `DATE` and `DATETIME` values to `time.Time` instead of `[]byte` / `string`
+The date or datetime like `0000-00-00 00:00:00` is converted into zero value of `time.Time`.
+
+
+##### `readTimeout`
+
+```
+Type:           duration
+Default:        0
+```
+
+I/O read timeout. The value must be a decimal number with a unit suffix (*"ms"*, *"s"*, *"m"*, *"h"*), such as *"30s"*, *"0.5m"* or *"1m30s"*.
+
+##### `rejectReadOnly`
+
+```
+Type:           bool
+Valid Values:   true, false
+Default:        false
+```
+
+
+`rejectReadOnly=true` causes the driver to reject read-only connections. This
+is for a possible race condition during an automatic failover, where the mysql
+client gets connected to a read-only replica after the failover.
+
+Note that this should be a fairly rare case, as an automatic failover normally
+happens when the primary is down, and the race condition shouldn't happen
+unless it comes back up online as soon as the failover is kicked off. On the
+other hand, when this happens, a MySQL application can get stuck on a
+read-only connection until restarted. It is however fairly easy to reproduce,
+for example, using a manual failover on AWS Aurora's MySQL-compatible cluster.
+
+If you are not relying on read-only transactions to reject writes that aren't
+supposed to happen, setting this on some MySQL providers (such as AWS Aurora)
+is safer for failovers.
+
+Note that ERROR 1290 can be returned for a `read-only` server and this option will
+cause a retry for that error. However the same error number is used for some
+other cases. You should ensure your application will never cause an ERROR 1290
+except for `read-only` mode when enabling this option.
+
+
+##### `serverPubKey`
+
+```
+Type:           string
+Valid Values:   <name>
+Default:        none
+```
+
+Server public keys can be registered with [`mysql.RegisterServerPubKey`](https://godoc.org/github.com/go-sql-driver/mysql#RegisterServerPubKey), which can then be used by the assigned name in the DSN.
+Public keys are used to transmit encrypted data, e.g. for authentication.
+If the server's public key is known, it should be set manually to avoid expensive and potentially insecure transmissions of the public key from the server to the client each time it is required.
+
+
+##### `timeout`
+
+```
+Type:           duration
+Default:        OS default
+```
+
+Timeout for establishing connections, aka dial timeout. The value must be a decimal number with a unit suffix (*"ms"*, *"s"*, *"m"*, *"h"*), such as *"30s"*, *"0.5m"* or *"1m30s"*.
+
+
+##### `tls`
+
+```
+Type:           bool / string
+Valid Values:   true, false, skip-verify, <name>
+Default:        false
+```
+
+`tls=true` enables TLS / SSL encrypted connection to the server. Use `skip-verify` if you want to use a self-signed or invalid certificate (server side). Use a custom value registered with [`mysql.RegisterTLSConfig`](https://godoc.org/github.com/go-sql-driver/mysql#RegisterTLSConfig).
+
+
+##### `writeTimeout`
+
+```
+Type:           duration
+Default:        0
+```
+
+I/O write timeout. The value must be a decimal number with a unit suffix (*"ms"*, *"s"*, *"m"*, *"h"*), such as *"30s"*, *"0.5m"* or *"1m30s"*.
+
+
+##### System Variables
+
+Any other parameters are interpreted as system variables:
+  * `<boolean_var>=<value>`: `SET <boolean_var>=<value>`
+  * `<enum_var>=<value>`: `SET <enum_var>=<value>`
+  * `<string_var>=%27<value>%27`: `SET <string_var>='<value>'`
+
+Rules:
+* The values for string variables must be quoted with `'`.
+* The values must also be [url.QueryEscape](http://golang.org/pkg/net/url/#QueryEscape)'ed!
+ (which implies values of string variables must be wrapped with `%27`).
+
+Examples:
+  * `autocommit=1`: `SET autocommit=1`
+  * [`time_zone=%27Europe%2FParis%27`](https://dev.mysql.com/doc/refman/5.5/en/time-zone-support.html): `SET time_zone='Europe/Paris'`
+  * [`tx_isolation=%27REPEATABLE-READ%27`](https://dev.mysql.com/doc/refman/5.5/en/server-system-variables.html#sysvar_tx_isolation): `SET tx_isolation='REPEATABLE-READ'`
+
+
+#### Examples
+```
+user@unix(/path/to/socket)/dbname
+```
+
+```
+root:pw@unix(/tmp/mysql.sock)/myDatabase?loc=Local
+```
+
+```
+user:password@tcp(localhost:5555)/dbname?tls=skip-verify&autocommit=true
+```
+
+Treat warnings as errors by setting the system variable [`sql_mode`](https://dev.mysql.com/doc/refman/5.7/en/sql-mode.html):
+```
+user:password@/dbname?sql_mode=TRADITIONAL
+```
+
+TCP via IPv6:
+```
+user:password@tcp([de:ad:be:ef::ca:fe]:80)/dbname?timeout=90s&collation=utf8mb4_unicode_ci
+```
+
+TCP on a remote host, e.g. Amazon RDS:
+```
+id:password@tcp(your-amazonaws-uri.com:3306)/dbname
+```
+
+Google Cloud SQL on App Engine (First Generation MySQL Server):
+```
+user@cloudsql(project-id:instance-name)/dbname
+```
+
+Google Cloud SQL on App Engine (Second Generation MySQL Server):
+```
+user@cloudsql(project-id:regionname:instance-name)/dbname
+```
+
+TCP using default port (3306) on localhost:
+```
+user:password@tcp/dbname?charset=utf8mb4,utf8&sys_var=esc%40ped
+```
+
+Use the default protocol (tcp) and host (localhost:3306):
+```
+user:password@/dbname
+```
+
+No Database preselected:
+```
+user:password@/
+```
+
+
+### Connection pool and timeouts
+The connection pool is managed by Go's database/sql package. For details on how to configure the size of the pool and how long connections stay in the pool see `*DB.SetMaxOpenConns`, `*DB.SetMaxIdleConns`, and `*DB.SetConnMaxLifetime` in the [database/sql documentation](https://golang.org/pkg/database/sql/). The read, write, and dial timeouts for each individual connection are configured with the DSN parameters [`readTimeout`](#readtimeout), [`writeTimeout`](#writetimeout), and [`timeout`](#timeout), respectively.
+
+## `ColumnType` Support
+This driver supports the [`ColumnType` interface](https://golang.org/pkg/database/sql/#ColumnType) introduced in Go 1.8, with the exception of [`ColumnType.Length()`](https://golang.org/pkg/database/sql/#ColumnType.Length), which is currently not supported.
+
+## `context.Context` Support
+Go 1.8 added `database/sql` support for `context.Context`. This driver supports query timeouts and cancellation via contexts.
+See [context support in the database/sql package](https://golang.org/doc/go1.8#database_sql) for more details.
+
+
+### `LOAD DATA LOCAL INFILE` support
+For this feature you need direct access to the package. Therefore you must change the import path (no `_`):
+```go
+import "github.com/go-sql-driver/mysql"
+```
+
+Files must be whitelisted by registering them with `mysql.RegisterLocalFile(filepath)` (recommended) or the Whitelist check must be deactivated by using the DSN parameter `allowAllFiles=true` ([*Might be insecure!*](http://dev.mysql.com/doc/refman/5.7/en/load-data-local.html)).
+
+To use a `io.Reader` a handler function must be registered with `mysql.RegisterReaderHandler(name, handler)` which returns a `io.Reader` or `io.ReadCloser`. The Reader is available with the filepath `Reader::<name>` then. Choose different names for different handlers and `DeregisterReaderHandler` when you don't need it anymore.
+
+See the [godoc of Go-MySQL-Driver](https://godoc.org/github.com/go-sql-driver/mysql "golang mysql driver documentation") for details.
+
+
+### `time.Time` support
+The default internal output type of MySQL `DATE` and `DATETIME` values is `[]byte` which allows you to scan the value into a `[]byte`, `string` or `sql.RawBytes` variable in your program.
+
+However, many want to scan MySQL `DATE` and `DATETIME` values into `time.Time` variables, which is the logical opposite in Go to `DATE` and `DATETIME` in MySQL. You can do that by changing the internal output type from `[]byte` to `time.Time` with the DSN parameter `parseTime=true`. You can set the default [`time.Time` location](https://golang.org/pkg/time/#Location) with the `loc` DSN parameter.
+
+**Caution:** As of Go 1.1, this makes `time.Time` the only variable type you can scan `DATE` and `DATETIME` values into. This breaks for example [`sql.RawBytes` support](https://github.com/go-sql-driver/mysql/wiki/Examples#rawbytes).
+
+Alternatively you can use the [`NullTime`](https://godoc.org/github.com/go-sql-driver/mysql#NullTime) type as the scan destination, which works with both `time.Time` and `string` / `[]byte`.
+
+
+### Unicode support
+Since version 1.1 Go-MySQL-Driver automatically uses the collation `utf8_general_ci` by default.
+
+Other collations / charsets can be set using the [`collation`](#collation) DSN parameter.
+
+Version 1.0 of the driver recommended adding `&charset=utf8` (alias for `SET NAMES utf8`) to the DSN to enable proper UTF-8 support. This is not necessary anymore. The [`collation`](#collation) parameter should be preferred to set another collation / charset than the default.
+
+See http://dev.mysql.com/doc/refman/5.7/en/charset-unicode.html for more details on MySQL's Unicode support.
+
+## Testing / Development
+To run the driver tests you may need to adjust the configuration. See the [Testing Wiki-Page](https://github.com/go-sql-driver/mysql/wiki/Testing "Testing") for details.
+
+Go-MySQL-Driver is not feature-complete yet. Your help is very appreciated.
+If you want to contribute, you can work on an [open issue](https://github.com/go-sql-driver/mysql/issues?state=open) or review a [pull request](https://github.com/go-sql-driver/mysql/pulls).
+
+See the [Contribution Guidelines](https://github.com/go-sql-driver/mysql/blob/master/CONTRIBUTING.md) for details.
+
+---------------------------------------
+
+## License
+Go-MySQL-Driver is licensed under the [Mozilla Public License Version 2.0](https://raw.github.com/go-sql-driver/mysql/master/LICENSE)
+
+Mozilla summarizes the license scope as follows:
+> MPL: The copyleft applies to any files containing MPLed code.
+
+
+That means:
+  * You can **use** the **unchanged** source code both in private and commercially.
+  * When distributing, you **must publish** the source code of any **changed files** licensed under the MPL 2.0 under a) the MPL 2.0 itself or b) a compatible license (e.g. GPL 3.0 or Apache License 2.0).
+  * You **needn't publish** the source code of your library as long as the files licensed under the MPL 2.0 are **unchanged**.
+
+Please read the [MPL 2.0 FAQ](https://www.mozilla.org/en-US/MPL/2.0/FAQ/) if you have further questions regarding the license.
+
+You can read the full terms here: [LICENSE](https://raw.github.com/go-sql-driver/mysql/master/LICENSE).
+
+![Go Gopher and MySQL Dolphin](https://raw.github.com/wiki/go-sql-driver/mysql/go-mysql-driver_m.jpg "Golang Gopher transporting the MySQL Dolphin in a wheelbarrow")
+

vendor/github.com/go-sql-driver/mysql/appengine.go

@@ -0,0 +1,19 @@
+// Go MySQL Driver - A MySQL-Driver for Go's database/sql package
+//
+// Copyright 2013 The Go-MySQL-Driver Authors. All rights reserved.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at http://mozilla.org/MPL/2.0/.
+
+// +build appengine
+
+package mysql
+
+import (
+	"google.golang.org/appengine/cloudsql"
+)
+
+func init() {
+	RegisterDial("cloudsql", cloudsql.Dial)
+}

vendor/github.com/go-sql-driver/mysql/auth.go

@@ -0,0 +1,420 @@
+// Go MySQL Driver - A MySQL-Driver for Go's database/sql package
+//
+// Copyright 2018 The Go-MySQL-Driver Authors. All rights reserved.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at http://mozilla.org/MPL/2.0/.
+
+package mysql
+
+import (
+	"crypto/rand"
+	"crypto/rsa"
+	"crypto/sha1"
+	"crypto/sha256"
+	"crypto/x509"
+	"encoding/pem"
+	"sync"
+)
+
+// server pub keys registry
+var (
+	serverPubKeyLock     sync.RWMutex
+	serverPubKeyRegistry map[string]*rsa.PublicKey
+)
+
+// RegisterServerPubKey registers a server RSA public key which can be used to
+// send data in a secure manner to the server without receiving the public key
+// in a potentially insecure way from the server first.
+// Registered keys can afterwards be used adding serverPubKey=<name> to the DSN.
+//
+// Note: The provided rsa.PublicKey instance is exclusively owned by the driver
+// after registering it and may not be modified.
+//
+//  data, err := ioutil.ReadFile("mykey.pem")
+//  if err != nil {
+//  	log.Fatal(err)
+//  }
+//
+//  block, _ := pem.Decode(data)
+//  if block == nil || block.Type != "PUBLIC KEY" {
+//  	log.Fatal("failed to decode PEM block containing public key")
+//  }
+//
+//  pub, err := x509.ParsePKIXPublicKey(block.Bytes)
+//  if err != nil {
+//  	log.Fatal(err)
+//  }
+//
+//  if rsaPubKey, ok := pub.(*rsa.PublicKey); ok {
+//  	mysql.RegisterServerPubKey("mykey", rsaPubKey)
+//  } else {
+//  	log.Fatal("not a RSA public key")
+//  }
+//
+func RegisterServerPubKey(name string, pubKey *rsa.PublicKey) {
+	serverPubKeyLock.Lock()
+	if serverPubKeyRegistry == nil {
+		serverPubKeyRegistry = make(map[string]*rsa.PublicKey)
+	}
+
+	serverPubKeyRegistry[name] = pubKey
+	serverPubKeyLock.Unlock()
+}
+
+// DeregisterServerPubKey removes the public key registered with the given name.
+func DeregisterServerPubKey(name string) {
+	serverPubKeyLock.Lock()
+	if serverPubKeyRegistry != nil {
+		delete(serverPubKeyRegistry, name)
+	}
+	serverPubKeyLock.Unlock()
+}
+
+func getServerPubKey(name string) (pubKey *rsa.PublicKey) {
+	serverPubKeyLock.RLock()
+	if v, ok := serverPubKeyRegistry[name]; ok {
+		pubKey = v
+	}
+	serverPubKeyLock.RUnlock()
+	return
+}
+
+// Hash password using pre 4.1 (old password) method
+// https://github.com/atcurtis/mariadb/blob/master/mysys/my_rnd.c
+type myRnd struct {
+	seed1, seed2 uint32
+}
+
+const myRndMaxVal = 0x3FFFFFFF
+
+// Pseudo random number generator
+func newMyRnd(seed1, seed2 uint32) *myRnd {
+	return &myRnd{
+		seed1: seed1 % myRndMaxVal,
+		seed2: seed2 % myRndMaxVal,
+	}
+}
+
+// Tested to be equivalent to MariaDB's floating point variant
+// http://play.golang.org/p/QHvhd4qved
+// http://play.golang.org/p/RG0q4ElWDx
+func (r *myRnd) NextByte() byte {
+	r.seed1 = (r.seed1*3 + r.seed2) % myRndMaxVal
+	r.seed2 = (r.seed1 + r.seed2 + 33) % myRndMaxVal
+
+	return byte(uint64(r.seed1) * 31 / myRndMaxVal)
+}
+
+// Generate binary hash from byte string using insecure pre 4.1 method
+func pwHash(password []byte) (result [2]uint32) {
+	var add uint32 = 7
+	var tmp uint32
+
+	result[0] = 1345345333
+	result[1] = 0x12345671
+
+	for _, c := range password {
+		// skip spaces and tabs in password
+		if c == ' ' || c == '\t' {
+			continue
+		}
+
+		tmp = uint32(c)
+		result[0] ^= (((result[0] & 63) + add) * tmp) + (result[0] << 8)
+		result[1] += (result[1] << 8) ^ result[0]
+		add += tmp
+	}
+
+	// Remove sign bit (1<<31)-1)
+	result[0] &= 0x7FFFFFFF
+	result[1] &= 0x7FFFFFFF
+
+	return
+}
+
+// Hash password using insecure pre 4.1 method
+func scrambleOldPassword(scramble []byte, password string) []byte {
+	if len(password) == 0 {
+		return nil
+	}
+
+	scramble = scramble[:8]
+
+	hashPw := pwHash([]byte(password))
+	hashSc := pwHash(scramble)
+
+	r := newMyRnd(hashPw[0]^hashSc[0], hashPw[1]^hashSc[1])
+
+	var out [8]byte
+	for i := range out {
+		out[i] = r.NextByte() + 64
+	}
+
+	mask := r.NextByte()
+	for i := range out {
+		out[i] ^= mask
+	}
+
+	return out[:]
+}
+
+// Hash password using 4.1+ method (SHA1)
+func scramblePassword(scramble []byte, password string) []byte {
+	if len(password) == 0 {
+		return nil
+	}
+
+	// stage1Hash = SHA1(password)
+	crypt := sha1.New()
+	crypt.Write([]byte(password))
+	stage1 := crypt.Sum(nil)
+
+	// scrambleHash = SHA1(scramble + SHA1(stage1Hash))
+	// inner Hash
+	crypt.Reset()
+	crypt.Write(stage1)
+	hash := crypt.Sum(nil)
+
+	// outer Hash
+	crypt.Reset()
+	crypt.Write(scramble)
+	crypt.Write(hash)
+	scramble = crypt.Sum(nil)
+
+	// token = scrambleHash XOR stage1Hash
+	for i := range scramble {
+		scramble[i] ^= stage1[i]
+	}
+	return scramble
+}
+
+// Hash password using MySQL 8+ method (SHA256)
+func scrambleSHA256Password(scramble []byte, password string) []byte {
+	if len(password) == 0 {
+		return nil
+	}
+
+	// XOR(SHA256(password), SHA256(SHA256(SHA256(password)), scramble))
+
+	crypt := sha256.New()
+	crypt.Write([]byte(password))
+	message1 := crypt.Sum(nil)
+
+	crypt.Reset()
+	crypt.Write(message1)
+	message1Hash := crypt.Sum(nil)
+
+	crypt.Reset()
+	crypt.Write(message1Hash)
+	crypt.Write(scramble)
+	message2 := crypt.Sum(nil)
+
+	for i := range message1 {
+		message1[i] ^= message2[i]
+	}
+
+	return message1
+}
+
+func encryptPassword(password string, seed []byte, pub *rsa.PublicKey) ([]byte, error) {
+	plain := make([]byte, len(password)+1)
+	copy(plain, password)
+	for i := range plain {
+		j := i % len(seed)
+		plain[i] ^= seed[j]
+	}
+	sha1 := sha1.New()
+	return rsa.EncryptOAEP(sha1, rand.Reader, pub, plain, nil)
+}
+
+func (mc *mysqlConn) sendEncryptedPassword(seed []byte, pub *rsa.PublicKey) error {
+	enc, err := encryptPassword(mc.cfg.Passwd, seed, pub)
+	if err != nil {
+		return err
+	}
+	return mc.writeAuthSwitchPacket(enc)
+}
+
+func (mc *mysqlConn) auth(authData []byte, plugin string) ([]byte, error) {
+	switch plugin {
+	case "caching_sha2_password":
+		authResp := scrambleSHA256Password(authData, mc.cfg.Passwd)
+		return authResp, nil
+
+	case "mysql_old_password":
+		if !mc.cfg.AllowOldPasswords {
+			return nil, ErrOldPassword
+		}
+		// Note: there are edge cases where this should work but doesn't;
+		// this is currently "wontfix":
+		// https://github.com/go-sql-driver/mysql/issues/184
+		authResp := append(scrambleOldPassword(authData[:8], mc.cfg.Passwd), 0)
+		return authResp, nil
+
+	case "mysql_clear_password":
+		if !mc.cfg.AllowCleartextPasswords {
+			return nil, ErrCleartextPassword
+		}
+		// http://dev.mysql.com/doc/refman/5.7/en/cleartext-authentication-plugin.html
+		// http://dev.mysql.com/doc/refman/5.7/en/pam-authentication-plugin.html
+		return append([]byte(mc.cfg.Passwd), 0), nil
+
+	case "mysql_native_password":
+		if !mc.cfg.AllowNativePasswords {
+			return nil, ErrNativePassword
+		}
+		// https://dev.mysql.com/doc/internals/en/secure-password-authentication.html
+		// Native password authentication only need and will need 20-byte challenge.
+		authResp := scramblePassword(authData[:20], mc.cfg.Passwd)
+		return authResp, nil
+
+	case "sha256_password":
+		if len(mc.cfg.Passwd) == 0 {
+			return []byte{0}, nil
+		}
+		if mc.cfg.tls != nil || mc.cfg.Net == "unix" {
+			// write cleartext auth packet
+			return append([]byte(mc.cfg.Passwd), 0), nil
+		}
+
+		pubKey := mc.cfg.pubKey
+		if pubKey == nil {
+			// request public key from server
+			return []byte{1}, nil
+		}
+
+		// encrypted password
+		enc, err := encryptPassword(mc.cfg.Passwd, authData, pubKey)
+		return enc, err
+
+	default:
+		errLog.Print("unknown auth plugin:", plugin)
+		return nil, ErrUnknownPlugin
+	}
+}
+
+func (mc *mysqlConn) handleAuthResult(oldAuthData []byte, plugin string) error {
+	// Read Result Packet
+	authData, newPlugin, err := mc.readAuthResult()
+	if err != nil {
+		return err
+	}
+
+	// handle auth plugin switch, if requested
+	if newPlugin != "" {
+		// If CLIENT_PLUGIN_AUTH capability is not supported, no new cipher is
+		// sent and we have to keep using the cipher sent in the init packet.
+		if authData == nil {
+			authData = oldAuthData
+		} else {
+			// copy data from read buffer to owned slice
+			copy(oldAuthData, authData)
+		}
+
+		plugin = newPlugin
+
+		authResp, err := mc.auth(authData, plugin)
+		if err != nil {
+			return err
+		}
+		if err = mc.writeAuthSwitchPacket(authResp); err != nil {
+			return err
+		}
+
+		// Read Result Packet
+		authData, newPlugin, err = mc.readAuthResult()
+		if err != nil {
+			return err
+		}
+
+		// Do not allow to change the auth plugin more than once
+		if newPlugin != "" {
+			return ErrMalformPkt
+		}
+	}
+
+	switch plugin {
+
+	// https://insidemysql.com/preparing-your-community-connector-for-mysql-8-part-2-sha256/
+	case "caching_sha2_password":
+		switch len(authData) {
+		case 0:
+			return nil // auth successful
+		case 1:
+			switch authData[0] {
+			case cachingSha2PasswordFastAuthSuccess:
+				if err = mc.readResultOK(); err == nil {
+					return nil // auth successful
+				}
+
+			case cachingSha2PasswordPerformFullAuthentication:
+				if mc.cfg.tls != nil || mc.cfg.Net == "unix" {
+					// write cleartext auth packet
+					err = mc.writeAuthSwitchPacket(append([]byte(mc.cfg.Passwd), 0))
+					if err != nil {
+						return err
+					}
+				} else {
+					pubKey := mc.cfg.pubKey
+					if pubKey == nil {
+						// request public key from server
+						data := mc.buf.takeSmallBuffer(4 + 1)
+						data[4] = cachingSha2PasswordRequestPublicKey
+						mc.writePacket(data)
+
+						// parse public key
+						data, err := mc.readPacket()
+						if err != nil {
+							return err
+						}
+
+						block, _ := pem.Decode(data[1:])
+						pkix, err := x509.ParsePKIXPublicKey(block.Bytes)
+						if err != nil {
+							return err
+						}
+						pubKey = pkix.(*rsa.PublicKey)
+					}
+
+					// send encrypted password
+					err = mc.sendEncryptedPassword(oldAuthData, pubKey)
+					if err != nil {
+						return err
+					}
+				}
+				return mc.readResultOK()
+
+			default:
+				return ErrMalformPkt
+			}
+		default:
+			return ErrMalformPkt
+		}
+
+	case "sha256_password":
+		switch len(authData) {
+		case 0:
+			return nil // auth successful
+		default:
+			block, _ := pem.Decode(authData)
+			pub, err := x509.ParsePKIXPublicKey(block.Bytes)
+			if err != nil {
+				return err
+			}
+
+			// send encrypted password
+			err = mc.sendEncryptedPassword(oldAuthData, pub.(*rsa.PublicKey))
+			if err != nil {
+				return err
+			}
+			return mc.readResultOK()
+		}
+
+	default:
+		return nil // auth successful
+	}
+
+	return err
+}