Backport #10433 - MySQL - Fix username generation length bug

changelog/10433.txt

@@ -0,0 +1,4 @@
+```release-note:bug
+secrets/database/mysql: Fixes issue where the DisplayName within generated usernames was the incorrect length
+```
+

go.mod

@@ -121,9 +121,8 @@ require (
 	github.com/nwaples/rardecode v1.1.0 // indirect
 	github.com/oklog/run v1.0.0
 	github.com/okta/okta-sdk-golang/v2 v2.0.0
-	github.com/opencontainers/runc v1.0.0-rc9 // indirect
 	github.com/oracle/oci-go-sdk v12.5.0+incompatible
-	github.com/ory/dockertest v3.3.5+incompatible
+	github.com/ory/dockertest/v3 v3.6.2
 	github.com/patrickmn/go-cache v2.1.0+incompatible
 	github.com/petermattis/goid v0.0.0-20180202154549-b0b1615b78e5 // indirect
 	github.com/pkg/errors v0.9.1

go.sum

@@ -110,6 +110,7 @@ github.com/Knetic/govaluate v3.0.1-0.20171022003610-9aa49832a739+incompatible/go
 github.com/Masterminds/semver v1.4.2 h1:WBLTQ37jOCzSLtXNdoo8bNM8876KhNqOKvrlGITgsTc=
 github.com/Masterminds/semver v1.4.2/go.mod h1:MB6lktGJrhw8PrUyiEoblNEGEQ+RzHPF078ddwwvV3Y=
 github.com/Microsoft/go-winio v0.4.13/go.mod h1:qXqCSQ3Xa7+6tgxaGTIe4Kpcdsi+P8jBhyzoq1bpyYA=
+github.com/Microsoft/go-winio v0.4.14/go.mod h1:qXqCSQ3Xa7+6tgxaGTIe4Kpcdsi+P8jBhyzoq1bpyYA=
 github.com/Microsoft/go-winio v0.4.15-0.20190919025122-fc70bd9a86b5 h1:ygIc8M6trr62pF5DucadTWGdEB4mEyvzi0e2nbcmcyA=
 github.com/Microsoft/go-winio v0.4.15-0.20190919025122-fc70bd9a86b5/go.mod h1:tTuCMEN+UleMWgg9dVx4Hu52b1bJo+59jBh3ajtinzw=
 github.com/Microsoft/hcsshim v0.8.9 h1:VrfodqvztU8YSOvygU+DN1BGaSGxmrNfqOv5oOuX2Bk=
@@ -233,6 +234,7 @@ github.com/containerd/containerd v1.3.2/go.mod h1:bC6axHOhabU15QhwfG7w5PipXdVtMX
 github.com/containerd/containerd v1.3.4 h1:3o0smo5SKY7H6AJCmJhsnCjR2/V2T8VmiHt7seN2/kI=
 github.com/containerd/containerd v1.3.4/go.mod h1:bC6axHOhabU15QhwfG7w5PipXdVtMXFTttgp+kVtyUA=
 github.com/containerd/continuity v0.0.0-20190426062206-aaeac12a7ffc/go.mod h1:GL3xCUCBDV3CZiTSEKksMWbLE66hEyuu9qyDOOqM47Y=
+github.com/containerd/continuity v0.0.0-20190827140505-75bee3e2ccb6/go.mod h1:GL3xCUCBDV3CZiTSEKksMWbLE66hEyuu9qyDOOqM47Y=
 github.com/containerd/continuity v0.0.0-20200709052629-daa8e1ccc0bc/go.mod h1:cECdGN1O8G9bgKTlLhuPJimka6Xb/Gg7vYzCTNVxhvo=
 github.com/containerd/continuity v0.0.0-20200710164510-efbc4488d8fe h1:PEmIrUvwG9Yyv+0WKZqjXfSFDeZjs/q15g0m08BYS9k=
 github.com/containerd/continuity v0.0.0-20200710164510-efbc4488d8fe/go.mod h1:cECdGN1O8G9bgKTlLhuPJimka6Xb/Gg7vYzCTNVxhvo=
@@ -262,6 +264,7 @@ github.com/couchbase/gocbcore/v9 v9.0.4/go.mod h1:jOSQeBSECyNvD7aS4lfuaw+pD5t6ci
 github.com/cpuguy83/go-md2man v1.0.10/go.mod h1:SmD6nW6nTyfqj6ABTjUi3V3JVMnlJmwcJI5acqYI6dE=
 github.com/cpuguy83/go-md2man/v2 v2.0.0-20190314233015-f79a8a8ca69d/go.mod h1:maD7wRr/U5Z6m/iR4s+kqSMx2CaBsrgA7czyZG/E6dU=
 github.com/creack/pty v1.1.7/go.mod h1:lj5s0c3V2DBrqTV7llrYr5NG6My20zk30Fl46Y7DoTY=
+github.com/creack/pty v1.1.9 h1:uDmaGzcdjhF4i/plgjmEsriH11Y0o7RKapEf/LDaM3w=
 github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
@@ -763,6 +766,7 @@ github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
 github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
 github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
 github.com/lestrrat-go/jwx v0.9.0/go.mod h1:iEoxlYfZjvoGpuWwxUz+eR5e6KTJGsaRcy/YNA/UnBk=
+github.com/lib/pq v0.0.0-20180327071824-d34b9ff171c2/go.mod h1:5WUZQaWbwv1U+lTReE5YruASi9Al49XbQIvNi/34Woo=
 github.com/lib/pq v1.1.1/go.mod h1:5WUZQaWbwv1U+lTReE5YruASi9Al49XbQIvNi/34Woo=
 github.com/lib/pq v1.2.0/go.mod h1:5WUZQaWbwv1U+lTReE5YruASi9Al49XbQIvNi/34Woo=
 github.com/lib/pq v1.8.0 h1:9xohqzkUwzR4Ga4ivdTcawVS89YSDVxXMa3xJX3cGzg=
@@ -833,6 +837,8 @@ github.com/mitchellh/pointerstructure v1.0.0/go.mod h1:k4XwG94++jLVsSiTxo7qdIfXA
 github.com/mitchellh/reflectwalk v1.0.0/go.mod h1:mSTlrgnPZtwu0c4WaC2kGObEpuNDbx0jmZXqmk4esnw=
 github.com/mitchellh/reflectwalk v1.0.1 h1:FVzMWA5RllMAKIdUSC8mdWo3XtwoecrH79BY70sEEpE=
 github.com/mitchellh/reflectwalk v1.0.1/go.mod h1:mSTlrgnPZtwu0c4WaC2kGObEpuNDbx0jmZXqmk4esnw=
+github.com/moby/term v0.0.0-20200915141129-7f0af18e79f2 h1:SPoLlS9qUUnXcIY4pvA4CTwYjk0Is5f4UPEkeESr53k=
+github.com/moby/term v0.0.0-20200915141129-7f0af18e79f2/go.mod h1:TjQg8pa4iejrUrjiz0MCtMV38jdMNW4doKSiBrEvCQQ=
 github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
 github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd h1:TRLaZ9cD/w8PVh93nsPXa1VrQ6jlwL5oN8l14QlcNfg=
 github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
@@ -919,6 +925,8 @@ github.com/oracle/oci-go-sdk v12.5.0+incompatible/go.mod h1:VQb79nF8Z2cwLkLS35uk
 github.com/ory/dockertest v3.3.4+incompatible/go.mod h1:1vX4m9wsvi00u5bseYwXaSnhNrne+V0E6LAcBILJdPs=
 github.com/ory/dockertest v3.3.5+incompatible h1:iLLK6SQwIhcbrG783Dghaaa3WPzGc+4Emza6EbVUUGA=
 github.com/ory/dockertest v3.3.5+incompatible/go.mod h1:1vX4m9wsvi00u5bseYwXaSnhNrne+V0E6LAcBILJdPs=
+github.com/ory/dockertest/v3 v3.6.2 h1:Q3Y8naCMyC1Nw91BHum1bGyEsNQc/UOIYS3ZoPoou0g=
+github.com/ory/dockertest/v3 v3.6.2/go.mod h1:EFLcVUOl8qCwp9NyDAcCDtq/QviLtYswW/VbWzUnTNE=
 github.com/oxtoacart/bpool v0.0.0-20150712133111-4e1c5567d7c2 h1:CXwSGu/LYmbjEab5aMCs5usQRVBGThelUKBNnoSOuso=
 github.com/oxtoacart/bpool v0.0.0-20150712133111-4e1c5567d7c2/go.mod h1:L3UMQOThbttwfYRNFOWLLVXMhk5Lkio4GGOtw5UrxS0=
 github.com/packethost/packngo v0.1.1-0.20180711074735-b9cb5096f54c h1:vwpFWvAO8DeIZfFeqASzZfsxuWPno9ncAebBEP0N3uE=
@@ -1235,6 +1243,7 @@ golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLL
 golang.org/x/net v0.0.0-20190628185345-da137c7871d7/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20190724013045-ca1201d0de80/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20190813141303-74dc4d7220e7/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
+golang.org/x/net v0.0.0-20191003171128-d98b1b443823/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20191004110552-13f9640d40b9/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20191112182307-2180aed22343/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20191209160850-c0dbc17a3553/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
@@ -1326,6 +1335,8 @@ golang.org/x/sys v0.0.0-20200625212154-ddb9806d33ae h1:Ih9Yo4hSPImZOpfGuA4bR/ORK
 golang.org/x/sys v0.0.0-20200625212154-ddb9806d33ae/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200828194041-157a740278f4 h1:kCCpuwSAoYJPkNc6x0xT9yTtV4oKtARo4RGBQWOfg9E=
 golang.org/x/sys v0.0.0-20200828194041-157a740278f4/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200831180312-196b9ba8737a h1:i47hUS795cOydZI4AwJQCKXOr4BvxzvikwDoDtHhP2Y=
+golang.org/x/sys v0.0.0-20200831180312-196b9ba8737a/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/text v0.0.0-20160726164857-2910a502d2bf/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.0.0-20170915032832-14c0d48ead0c/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
@@ -1533,13 +1544,15 @@ gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.5/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.7/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.3.0 h1:clyUAQHOM3G0M3f5vQj7LuJrETvjVot3Z5el9nffUtU=
 gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gotest.tools v2.2.0+incompatible h1:VsBPFP1AI068pPrMxtb/S8Zkgf9xEmTLJjfM+P5UIEo=
 gotest.tools v2.2.0+incompatible/go.mod h1:DsYFclhRJ6vuDpmuTbkuFWG+y2sxOXAzmJt81HFBacw=
+gotest.tools/v3 v3.0.2 h1:kG1BFyqVHuQoVQiR1bWGnfz/fmHvvuiSPIV7rvl360E=
 gotest.tools/v3 v3.0.2/go.mod h1:3SzNCllyD9/Y+b5r9JIKQ474KzkZyqLqEfYqMsX94Bk=
 honnef.co/go/tools v0.0.0-20180728063816-88497007e858/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20180920025451-e3ad64cb4ed3/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=

helper/builtinplugins/registry.go

@@ -10,6 +10,7 @@ import (
 	credKerb "github.com/hashicorp/vault-plugin-auth-kerberos"
 	credKube "github.com/hashicorp/vault-plugin-auth-kubernetes"
 	credOCI "github.com/hashicorp/vault-plugin-auth-oci"
+	"github.com/hashicorp/vault/sdk/database/helper/credsutil"
 
 	dbCouchbase "github.com/hashicorp/vault-plugin-database-couchbase"
 	dbElastic "github.com/hashicorp/vault-plugin-database-elasticsearch"
@@ -94,10 +95,10 @@ func newRegistry() *registry {
 		databasePlugins: map[string]BuiltinFactory{
 			// These four plugins all use the same mysql implementation but with
 			// different username settings passed by the constructor.
-			"mysql-database-plugin":        dbMysql.New(false),
-			"mysql-aurora-database-plugin": dbMysql.New(true),
-			"mysql-rds-database-plugin":    dbMysql.New(true),
-			"mysql-legacy-database-plugin": dbMysql.New(true),
+			"mysql-database-plugin":        dbMysql.New(dbMysql.MetadataLen, dbMysql.MetadataLen, dbMysql.UsernameLen),
+			"mysql-aurora-database-plugin": dbMysql.New(credsutil.NoneLength, dbMysql.LegacyMetadataLen, dbMysql.LegacyUsernameLen),
+			"mysql-rds-database-plugin":    dbMysql.New(credsutil.NoneLength, dbMysql.LegacyMetadataLen, dbMysql.LegacyUsernameLen),
+			"mysql-legacy-database-plugin": dbMysql.New(credsutil.NoneLength, dbMysql.LegacyMetadataLen, dbMysql.LegacyUsernameLen),
 
 			"cassandra-database-plugin":     dbCass.New,
 			"couchbase-database-plugin":     dbCouchbase.New,

plugins/database/mysql/connection_producer_test.go

@@ -14,7 +14,7 @@ import (
 
 	"github.com/hashicorp/vault/helper/testhelpers/certhelpers"
 	"github.com/hashicorp/vault/sdk/database/helper/dbutil"
-	"github.com/ory/dockertest"
+	dockertest "github.com/ory/dockertest/v3"
 )
 
 func Test_addTLStoDSN(t *testing.T) {
@@ -124,7 +124,7 @@ ssl-key=/etc/mysql/server-key.pem`
 
 	// //////////////////////////////////////////////////////
 	// Test
-	mysql := new(false)
+	mysql := newMySQL(MetadataLen, MetadataLen, UsernameLen)
 
 	conf := map[string]interface{}{
 		"connection_url":      retURL,

plugins/database/mysql/mysql.go

@@ -39,26 +39,31 @@ var _ dbplugin.Database = (*MySQL)(nil)
 
 type MySQL struct {
 	*mySQLConnectionProducer
-	legacy bool
+
+	displayNameLen int
+	roleNameLen    int
+	maxUsernameLen int
 }
 
 // New implements builtinplugins.BuiltinFactory
-func New(legacy bool) func() (interface{}, error) {
+func New(displayNameLen int, roleNameLen int, maxUsernameLen int) func() (interface{}, error) {
 	return func() (interface{}, error) {
-		db := new(legacy)
+		db := newMySQL(displayNameLen, roleNameLen, maxUsernameLen)
 		// Wrap the plugin with middleware to sanitize errors
 		dbType := dbplugin.NewDatabaseErrorSanitizerMiddleware(db, db.SecretValues)
 
 		return dbType, nil
 	}
 }
 
-func new(legacy bool) *MySQL {
+func newMySQL(displayNameLen int, roleNameLen int, maxUsernameLen int) *MySQL {
 	connProducer := &mySQLConnectionProducer{}
 
 	return &MySQL{
 		mySQLConnectionProducer: connProducer,
-		legacy:                  legacy,
+		displayNameLen:          displayNameLen,
+		roleNameLen:             roleNameLen,
+		maxUsernameLen:          maxUsernameLen,
 	}
 }
 
@@ -118,22 +123,10 @@ func (m *MySQL) NewUser(ctx context.Context, req dbplugin.NewUserRequest) (dbplu
 }
 
 func (m *MySQL) generateUsername(req dbplugin.NewUserRequest) (string, error) {
-	var dispNameLen, roleNameLen, maxLen int
-
-	if m.legacy {
-		dispNameLen = LegacyUsernameLen
-		roleNameLen = LegacyMetadataLen
-		maxLen = LegacyUsernameLen
-	} else {
-		dispNameLen = UsernameLen
-		roleNameLen = MetadataLen
-		maxLen = UsernameLen
-	}
-
 	username, err := credsutil.GenerateUsername(
-		credsutil.DisplayName(req.UsernameConfig.DisplayName, dispNameLen),
-		credsutil.RoleName(req.UsernameConfig.RoleName, roleNameLen),
-		credsutil.MaxLength(maxLen),
+		credsutil.DisplayName(req.UsernameConfig.DisplayName, m.displayNameLen),
+		credsutil.RoleName(req.UsernameConfig.RoleName, m.roleNameLen),
+		credsutil.MaxLength(m.maxUsernameLen),
 	)
 	if err != nil {
 		return "", errwrap.Wrapf("error generating username: {{err}}", err)

plugins/database/mysql/mysql_test.go

@@ -30,7 +30,7 @@ func TestMySQL_Initialize(t *testing.T) {
 		VerifyConnection: true,
 	}
 
-	db := new(false)
+	db := newMySQL(MetadataLen, MetadataLen, UsernameLen)
 	_, err := db.Initialize(context.Background(), initReq)
 	if err != nil {
 		t.Fatalf("err: %s", err)
@@ -56,7 +56,7 @@ func TestMySQL_Initialize(t *testing.T) {
 		VerifyConnection: true,
 	}
 
-	db = new(false)
+	db = newMySQL(MetadataLen, MetadataLen, UsernameLen)
 	_, err = db.Initialize(context.Background(), initReq)
 	if err != nil {
 		t.Fatalf("err: %s", err)
@@ -65,7 +65,7 @@ func TestMySQL_Initialize(t *testing.T) {
 
 func TestMySQL_CreateUser(t *testing.T) {
 	t.Run("missing creation statements", func(t *testing.T) {
-		db := new(false)
+		db := newMySQL(MetadataLen, MetadataLen, UsernameLen)
 
 		password, err := credsutil.RandomAlphaNumeric(32, false)
 		if err != nil {
@@ -107,7 +107,7 @@ func TestMySQL_CreateUser(t *testing.T) {
 			VerifyConnection: true,
 		}
 
-		db := new(false)
+		db := newMySQL(MetadataLen, MetadataLen, UsernameLen)
 		_, err := db.Initialize(context.Background(), initReq)
 		if err != nil {
 			t.Fatalf("err: %s", err)
@@ -130,7 +130,7 @@ func TestMySQL_CreateUser(t *testing.T) {
 			VerifyConnection: true,
 		}
 
-		db := new(true)
+		db := newMySQL(credsutil.NoneLength, LegacyMetadataLen, LegacyUsernameLen)
 		_, err := db.Initialize(context.Background(), initReq)
 		if err != nil {
 			t.Fatalf("err: %s", err)
@@ -260,7 +260,7 @@ func TestMySQL_RotateRootCredentials(t *testing.T) {
 				VerifyConnection: true,
 			}
 
-			db := new(false)
+			db := newMySQL(MetadataLen, MetadataLen, UsernameLen)
 			_, err := db.Initialize(context.Background(), initReq)
 			if err != nil {
 				t.Fatalf("err: %s", err)
@@ -335,7 +335,7 @@ func TestMySQL_DeleteUser(t *testing.T) {
 		VerifyConnection: true,
 	}
 
-	db := new(false)
+	db := newMySQL(MetadataLen, MetadataLen, UsernameLen)
 	_, err := db.Initialize(context.Background(), initReq)
 	if err != nil {
 		t.Fatalf("err: %s", err)
@@ -444,7 +444,7 @@ func TestMySQL_UpdateUser(t *testing.T) {
 			ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
 			defer cancel()
 
-			db := new(false)
+			db := newMySQL(MetadataLen, MetadataLen, UsernameLen)
 			_, err := db.Initialize(context.Background(), initReq)
 			if err != nil {
 				t.Fatalf("err: %s", err)
@@ -496,7 +496,7 @@ func TestMySQL_Initialize_ReservedChars(t *testing.T) {
 		"password":       pw,
 	}
 
-	db := new(false)
+	db := newMySQL(MetadataLen, MetadataLen, UsernameLen)
 	_, err := db.Init(context.Background(), connectionDetails, true)
 	if err != nil {
 		t.Fatalf("err: %s", err)

vault/testing.go

@@ -2048,7 +2048,7 @@ func (m *mockBuiltinRegistry) Get(name string, pluginType consts.PluginType) (fu
 	if name == "postgresql-database-plugin" {
 		return dbPostgres.New, true
 	}
-	return dbMysql.New(false), true
+	return dbMysql.New(dbMysql.MetadataLen, dbMysql.MetadataLen, dbMysql.UsernameLen), true
 }
 
 // Keys only supports getting a realistic list of the keys for database plugins.