add support for ipfilter plugins

Signed-off-by: Nicola Murino <[email protected]>

.github/workflows/development.yml

@@ -36,6 +36,9 @@ jobs:
           cd tests/eventsearcher
           go build -trimpath -ldflags "-s -w" -o eventsearcher
           cd -
+          cd tests/ipfilter
+          go build -trimpath -ldflags "-s -w" -o ipfilter
+          cd -
 
       - name: Build for macOS arm64
         if: startsWith(matrix.os, 'macos-') == true
@@ -56,6 +59,9 @@ jobs:
           cd tests/eventsearcher
           go build -trimpath -ldflags "-s -w" -o eventsearcher.exe
           cd ../..
+          cd tests/ipfilter
+          go build -trimpath -ldflags "-s -w" -o ipfilter.exe
+          cd ../..
           mkdir arm64
           $Env:CGO_ENABLED='0'
           $Env:GOOS='windows'
@@ -230,6 +236,9 @@ jobs:
           cd tests/eventsearcher
           go build -trimpath -ldflags "-s -w" -o eventsearcher
           cd -
+          cd tests/ipfilter
+          go build -trimpath -ldflags "-s -w" -o ipfilter
+          cd -
         env:
           GOARCH: 386
 
@@ -286,6 +295,9 @@ jobs:
           cd tests/eventsearcher
           go build -trimpath -ldflags "-s -w" -o eventsearcher
           cd -
+          cd tests/ipfilter
+          go build -trimpath -ldflags "-s -w" -o ipfilter
+          cd -
 
       - name: Run tests using PostgreSQL provider
         run: |

common/common.go

@@ -23,6 +23,7 @@ import (
 	"github.com/drakkan/sftpgo/v2/httpclient"
 	"github.com/drakkan/sftpgo/v2/logger"
 	"github.com/drakkan/sftpgo/v2/metric"
+	"github.com/drakkan/sftpgo/v2/plugin"
 	"github.com/drakkan/sftpgo/v2/util"
 	"github.com/drakkan/sftpgo/v2/vfs"
 )
@@ -225,6 +226,9 @@ func Reload() error {
 
 // IsBanned returns true if the specified IP address is banned
 func IsBanned(ip string) bool {
+	if plugin.Handler.IsIPBanned(ip) {
+		return true
+	}
 	if Config.defender == nil {
 		return false
 	}

common/common_test.go

@@ -22,6 +22,7 @@ import (
 
 	"github.com/drakkan/sftpgo/v2/dataprovider"
 	"github.com/drakkan/sftpgo/v2/kms"
+	"github.com/drakkan/sftpgo/v2/plugin"
 	"github.com/drakkan/sftpgo/v2/util"
 	"github.com/drakkan/sftpgo/v2/vfs"
 )
@@ -128,9 +129,26 @@ func TestDefenderIntegration(t *testing.T) {
 	// by default defender is nil
 	configCopy := Config
 
+	wdPath, err := os.Getwd()
+	require.NoError(t, err)
+	pluginsConfig := []plugin.Config{
+		{
+			Type:     "ipfilter",
+			Cmd:      filepath.Join(wdPath, "..", "tests", "ipfilter", "ipfilter"),
+			AutoMTLS: true,
+		},
+	}
+	if runtime.GOOS == osWindows {
+		pluginsConfig[0].Cmd += ".exe"
+	}
+	err = plugin.Initialize(pluginsConfig, true)
+	require.NoError(t, err)
+
 	ip := "127.1.1.1"
 
 	assert.Nil(t, Reload())
+	// 192.168.1.12 is banned from the ipfilter plugin
+	assert.True(t, IsBanned("192.168.1.12"))
 
 	AddDefenderEvent(ip, HostEventNoLoginTried)
 	assert.False(t, IsBanned(ip))

go.mod

@@ -47,7 +47,7 @@ require (
 	github.com/rs/cors v1.8.2
 	github.com/rs/xid v1.4.0
 	github.com/rs/zerolog v1.26.2-0.20220227173336-263b0bde3672
-	github.com/sftpgo/sdk v0.1.1-0.20220306155429-3a036106d884
+	github.com/sftpgo/sdk v0.1.1-0.20220323095514-1e4782d9c52e
 	github.com/shirou/gopsutil/v3 v3.22.2
 	github.com/spf13/afero v1.8.2
 	github.com/spf13/cobra v1.4.0

go.sum

@@ -662,8 +662,8 @@ github.com/russross/blackfriday/v2 v2.1.0 h1:JIOH55/0cWyOuilr9/qlrm0BSXldqnqwMsf
 github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
 github.com/satori/go.uuid v1.2.0/go.mod h1:dA0hQrYB0VpLJoorglMZABFdXlWrHn1NEOzdhQKdks0=
 github.com/secsy/goftp v0.0.0-20200609142545-aa2de14babf4 h1:PT+ElG/UUFMfqy5HrxJxNzj3QBOf7dZwupeVC+mG1Lo=
-github.com/sftpgo/sdk v0.1.1-0.20220306155429-3a036106d884 h1:YrOexWq3hwNk/QM3ZyP/VI2E7UcCj/PMqJd1PLA1EME=
-github.com/sftpgo/sdk v0.1.1-0.20220306155429-3a036106d884/go.mod h1:zqCRMcwS28IViwekJHNkFu4GqSfyVmOQTlh8h3icAXE=
+github.com/sftpgo/sdk v0.1.1-0.20220323095514-1e4782d9c52e h1:MZA1K8cG6Z31a788iOzidP4xARhsTIs0wvhxgPeVWXE=
+github.com/sftpgo/sdk v0.1.1-0.20220323095514-1e4782d9c52e/go.mod h1:m5J7DH8unhD5RUsREFRiidP8zgBjup0+iQaxQnYHJOM=
 github.com/shirou/gopsutil/v3 v3.22.2 h1:wCrArWFkHYIdDxx/FSfF5RB4dpJYW6t7rcp3+zL8uks=
 github.com/shirou/gopsutil/v3 v3.22.2/go.mod h1:WapW1AOOPlHyXr+yOyw3uYx36enocrtSoSBy0L5vUHY=
 github.com/shopspring/decimal v0.0.0-20180709203117-cd690d0c9e24/go.mod h1:M+9NzErvs504Cn4c5DxATwIqPbtswREoFCre64PpcG4=

httpd/oidc.go

@@ -424,7 +424,7 @@ func (o *oidcManager) cleanupTokens() {
 
 	for k, token := range o.tokens {
 		diff := util.GetTimeAsMsSinceEpoch(time.Now()) - token.UsedAt
-		// remove tokens unused from more than 1 hour
+		// remove tokens unused from more than tokenDeleteInterval
 		if diff > tokenDeleteInterval {
 			delete(o.tokens, k)
 		}

plugin/ipfilter.go

@@ -0,0 +1,82 @@
+package plugin
+
+import (
+	"crypto/sha256"
+	"fmt"
+	"os/exec"
+
+	"github.com/hashicorp/go-hclog"
+	"github.com/hashicorp/go-plugin"
+	"github.com/sftpgo/sdk/plugin/ipfilter"
+
+	"github.com/drakkan/sftpgo/v2/logger"
+)
+
+type ipFilterPlugin struct {
+	config Config
+	filter ipfilter.Filter
+	client *plugin.Client
+}
+
+func newIPFilterPlugin(config Config) (*ipFilterPlugin, error) {
+	p := &ipFilterPlugin{
+		config: config,
+	}
+	if err := p.initialize(); err != nil {
+		logger.Warn(logSender, "", "unable to create IP filter plugin: %v, config %+v", err, config)
+		return nil, err
+	}
+	return p, nil
+}
+
+func (p *ipFilterPlugin) exited() bool {
+	return p.client.Exited()
+}
+
+func (p *ipFilterPlugin) cleanup() {
+	p.client.Kill()
+}
+
+func (p *ipFilterPlugin) initialize() error {
+	logger.Debug(logSender, "", "create new IP filter plugin %#v", p.config.Cmd)
+	killProcess(p.config.Cmd)
+	var secureConfig *plugin.SecureConfig
+	if p.config.SHA256Sum != "" {
+		secureConfig.Checksum = []byte(p.config.SHA256Sum)
+		secureConfig.Hash = sha256.New()
+	}
+	client := plugin.NewClient(&plugin.ClientConfig{
+		HandshakeConfig: ipfilter.Handshake,
+		Plugins:         ipfilter.PluginMap,
+		Cmd:             exec.Command(p.config.Cmd, p.config.Args...),
+		AllowedProtocols: []plugin.Protocol{
+			plugin.ProtocolGRPC,
+		},
+		AutoMTLS:     p.config.AutoMTLS,
+		SecureConfig: secureConfig,
+		Managed:      false,
+		Logger: &logger.HCLogAdapter{
+			Logger: hclog.New(&hclog.LoggerOptions{
+				Name:        fmt.Sprintf("%v.%v", logSender, ipfilter.PluginName),
+				Level:       pluginsLogLevel,
+				DisableTime: true,
+			}),
+		},
+	})
+	rpcClient, err := client.Client()
+	if err != nil {
+		logger.Debug(logSender, "", "unable to get rpc client for plugin %#v: %v", p.config.Cmd, err)
+		return err
+	}
+	raw, err := rpcClient.Dispense(ipfilter.PluginName)
+	if err != nil {
+		logger.Debug(logSender, "", "unable to get plugin %v from rpc client for command %#v: %v",
+			ipfilter.PluginName, p.config.Cmd, err)
+		return err
+	}
+
+	p.client = client
+	p.filter = raw.(ipfilter.Filter)
+
+	return nil
+}

plugin/plugin.go

@@ -12,6 +12,7 @@ import (
 	"github.com/hashicorp/go-hclog"
 	"github.com/sftpgo/sdk/plugin/auth"
 	"github.com/sftpgo/sdk/plugin/eventsearcher"
+	"github.com/sftpgo/sdk/plugin/ipfilter"
 	kmsplugin "github.com/sftpgo/sdk/plugin/kms"
 	"github.com/sftpgo/sdk/plugin/metadata"
 	"github.com/sftpgo/sdk/plugin/notifier"
@@ -92,11 +93,14 @@ type Manager struct {
 	searcher      *searcherPlugin
 	metadaterLock sync.RWMutex
 	metadater     *metadataPlugin
+	ipFilterLock  sync.RWMutex
+	filter        *ipFilterPlugin
 	authScopes    int
 	hasSearcher   bool
 	hasMetadater  bool
 	hasNotifiers  bool
 	hasAuths      bool
+	hasIPFilter   bool
 }
 
 // Initialize initializes the configured plugins
@@ -116,7 +120,15 @@ func Initialize(configs []Config, logVerbose bool) error {
 	if err := Handler.validateConfigs(); err != nil {
 		return err
 	}
+	if err := initializePlugins(); err != nil {
+		return err
+	}
+
+	startCheckTicker()
+	return nil
+}
 
+func initializePlugins() error {
 	kmsID := 0
 	for idx, config := range Handler.Configs {
 		switch config.Type {
@@ -161,11 +173,17 @@ func Initialize(configs []Config, logVerbose bool) error {
 				return err
 			}
 			Handler.metadater = plugin
+		case ipfilter.PluginName:
+			plugin, err := newIPFilterPlugin(config)
+			if err != nil {
+				return err
+			}
+			Handler.filter = plugin
 		default:
 			return fmt.Errorf("unsupported plugin type: %v", config.Type)
 		}
 	}
-	startCheckTicker()
+
 	return nil
 }
 
@@ -176,9 +194,11 @@ func (m *Manager) validateConfigs() error {
 	m.hasMetadater = false
 	m.hasNotifiers = false
 	m.hasAuths = false
+	m.hasIPFilter = false
 
 	for _, config := range m.Configs {
-		if config.Type == kmsplugin.PluginName {
+		switch config.Type {
+		case kmsplugin.PluginName:
 			if _, ok := kmsSchemes[config.KMSOptions.Scheme]; ok {
 				return fmt.Errorf("invalid KMS configuration, duplicated scheme %#v", config.KMSOptions.Scheme)
 			}
@@ -187,24 +207,22 @@ func (m *Manager) validateConfigs() error {
 			}
 			kmsSchemes[config.KMSOptions.Scheme] = true
 			kmsEncryptions[config.KMSOptions.EncryptedStatus] = true
-		}
-		if config.Type == eventsearcher.PluginName {
+		case eventsearcher.PluginName:
 			if m.hasSearcher {
 				return errors.New("only one eventsearcher plugin can be defined")
 			}
 			m.hasSearcher = true
-		}
-		if config.Type == metadata.PluginName {
+		case metadata.PluginName:
 			if m.hasMetadater {
 				return errors.New("only one metadata plugin can be defined")
 			}
 			m.hasMetadater = true
-		}
-		if config.Type == notifier.PluginName {
+		case notifier.PluginName:
 			m.hasNotifiers = true
-		}
-		if config.Type == auth.PluginName {
+		case auth.PluginName:
 			m.hasAuths = true
+		case ipfilter.PluginName:
+			m.hasIPFilter = true
 		}
 	}
 	return nil
@@ -329,6 +347,25 @@ func (m *Manager) GetMetadataFolders(storageID, from string, limit int) ([]strin
 	return plugin.metadater.GetFolders(storageID, limit, from)
 }
 
+// IsIPBanned returns true if the IP filter plugin does not allow the specified ip.
+// If no IP filter plugin is defined this method returns false
+func (m *Manager) IsIPBanned(ip string) bool {
+	if !m.hasIPFilter {
+		return false
+	}
+
+	m.ipFilterLock.RLock()
+	plugin := m.filter
+	m.ipFilterLock.RUnlock()
+
+	if plugin.exited() {
+		logger.Warn(logSender, "", "ip filter plugin is not active, cannot check ip %#v", ip)
+		return false
+	}
+
+	return plugin.filter.CheckIP(ip) != nil
+}
+
 func (m *Manager) kmsEncrypt(secret kms.BaseSecret, url string, masterKey string, kmsID int) (string, string, int32, error) {
 	m.kmsLock.RLock()
 	plugin := m.kms[kmsID]
@@ -524,6 +561,16 @@ func (m *Manager) checkCrashedPlugins() {
 		}
 		m.metadaterLock.RUnlock()
 	}
+
+	if m.hasIPFilter {
+		m.ipFilterLock.RLock()
+		if m.filter.exited() {
+			defer func(cfg Config) {
+				Handler.restartIPFilterPlugin(cfg)
+			}(m.filter.config)
+		}
+		m.ipFilterLock.RUnlock()
+	}
 }
 
 func (m *Manager) restartNotifierPlugin(config Config, idx int) {
@@ -608,6 +655,22 @@ func (m *Manager) restartMetadaterPlugin(config Config) {
 	m.metadaterLock.Unlock()
 }
 
+func (m *Manager) restartIPFilterPlugin(config Config) {
+	if atomic.LoadInt32(&m.closed) == 1 {
+		return
+	}
+	logger.Info(logSender, "", "try to restart crashed IP filter plugin %#v", config.Cmd)
+	plugin, err := newIPFilterPlugin(config)
+	if err != nil {
+		logger.Error(logSender, "", "unable to restart IP filter plugin %#v, err: %v", config.Cmd, err)
+		return
+	}
+
+	m.ipFilterLock.Lock()
+	m.filter = plugin
+	m.ipFilterLock.Unlock()
+}
+
 // Cleanup releases all the active plugins
 func (m *Manager) Cleanup() {
 	logger.Debug(logSender, "", "cleanup")
@@ -647,6 +710,13 @@ func (m *Manager) Cleanup() {
 		m.metadater.cleanup()
 		m.metadaterLock.Unlock()
 	}
+
+	if m.hasIPFilter {
+		m.ipFilterLock.Lock()
+		logger.Debug(logSender, "", "cleanup IP filter plugin %v", m.filter.config.Cmd)
+		m.filter.cleanup()
+		m.ipFilterLock.Unlock()
+	}
 }
 
 func setLogLevel(logVerbose bool) {

plugin/util.go

@@ -16,10 +16,10 @@ func killProcess(processPath string) {
 		if err == nil {
 			if cmdLine == processPath {
 				err = p.Kill()
-				logger.Debug(logSender, "killed process %v, pid %v, err %v", cmdLine, p.Pid, err)
+				logger.Debug(logSender, "", "killed process %v, pid %v, err %v", cmdLine, p.Pid, err)
 				return
 			}
 		}
 	}
-	logger.Debug(logSender, "no match for plugin process %v", processPath)
+	logger.Debug(logSender, "", "no match for plugin process %v", processPath)
 }

tests/eventsearcher/go.mod

@@ -1,6 +1,6 @@
 module github.com/drakkan/sftpgo/tests/eventsearcher
 
-go 1.17
+go 1.18
 
 require (
 	github.com/hashicorp/go-plugin v1.4.3
@@ -11,17 +11,17 @@ require (
 	github.com/fatih/color v1.13.0 // indirect
 	github.com/golang/protobuf v1.5.2 // indirect
 	github.com/google/go-cmp v0.5.6 // indirect
-	github.com/hashicorp/go-hclog v1.1.0 // indirect
+	github.com/hashicorp/go-hclog v1.2.0 // indirect
 	github.com/hashicorp/yamux v0.0.0-20211028200310-0bc27b27de87 // indirect
 	github.com/mattn/go-colorable v0.1.12 // indirect
 	github.com/mattn/go-isatty v0.0.14 // indirect
 	github.com/mitchellh/go-testing-interface v1.14.1 // indirect
 	github.com/oklog/run v1.1.0 // indirect
-	golang.org/x/net v0.0.0-20220127200216-cd36cc0744dd // indirect
-	golang.org/x/sys v0.0.0-20220209214540-3681064d5158 // indirect
+	golang.org/x/net v0.0.0-20220225172249-27dd8689420f // indirect
+	golang.org/x/sys v0.0.0-20220319134239-a9b59b0215f8 // indirect
 	golang.org/x/text v0.3.7 // indirect
-	google.golang.org/genproto v0.0.0-20220211171837-173942840c17 // indirect
-	google.golang.org/grpc v1.44.0 // indirect
-	google.golang.org/protobuf v1.27.1 // indirect
+	google.golang.org/genproto v0.0.0-20220322021311-435b647f9ef2 // indirect
+	google.golang.org/grpc v1.45.0 // indirect
+	google.golang.org/protobuf v1.28.0 // indirect
 	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b // indirect
 )

tests/eventsearcher/go.sum

@@ -1,16 +1,13 @@
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
 cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
-github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
 github.com/antihax/optional v1.0.0/go.mod h1:uupD/76wgC+ih3iEmQUL+0Ugr19nfwCT1kdvxnR2qWY=
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
-github.com/cespare/xxhash v1.1.0/go.mod h1:XrSqR1VqqWfGrhpAt58auRo0WTKS1nRRg3ghfAqPWnc=
 github.com/cespare/xxhash/v2 v2.1.1/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
 github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f/go.mod h1:M8M6+tZqaGXZJjfX53e64911xZQV5JYwmTeXPW+k8Sc=
 github.com/cncf/udpa/go v0.0.0-20201120205902-5459f2c99403/go.mod h1:WmhPx2Nbnhtbo57+VJT5O0JRkEi1Wbu0z5j0R8u5Hbk=
 github.com/cncf/udpa/go v0.0.0-20210930031921-04548b0d99d4/go.mod h1:6pvJx4me5XPnfI9Z40ddWsdw2W/uZgQLFXToKeRcDiI=
-github.com/cncf/xds/go v0.0.0-20210312221358-fbca930ec8ed/go.mod h1:eXthEFrGJvWHgFFCl3hGmgk+/aYT6PnTQLykKQRLhEs=
 github.com/cncf/xds/go v0.0.0-20210805033703-aa0b78936158/go.mod h1:eXthEFrGJvWHgFFCl3hGmgk+/aYT6PnTQLykKQRLhEs=
 github.com/cncf/xds/go v0.0.0-20210922020428-25de7278fc84/go.mod h1:eXthEFrGJvWHgFFCl3hGmgk+/aYT6PnTQLykKQRLhEs=
 github.com/cncf/xds/go v0.0.0-20211011173535-cb28da3451f1/go.mod h1:eXthEFrGJvWHgFFCl3hGmgk+/aYT6PnTQLykKQRLhEs=
@@ -21,7 +18,6 @@ github.com/envoyproxy/go-control-plane v0.9.0/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymF
 github.com/envoyproxy/go-control-plane v0.9.1-0.20191026205805-5f8ba28d4473/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
 github.com/envoyproxy/go-control-plane v0.9.4/go.mod h1:6rpuAdCZL397s3pYoYcLgu1mIlRU8Am5FuJP05cCM98=
 github.com/envoyproxy/go-control-plane v0.9.9-0.20201210154907-fd9021fe5dad/go.mod h1:cXg6YxExXjJnVBQHBLXeUAgxn2UodCpnH306RInaBQk=
-github.com/envoyproxy/go-control-plane v0.9.9-0.20210512163311-63b5d3c536b0/go.mod h1:hliV/p42l8fGbc6Y9bQ70uLwIvmJyVE5k4iMKlh8wCQ=
 github.com/envoyproxy/go-control-plane v0.9.10-0.20210907150352-cf90f659a021/go.mod h1:AFq3mo9L8Lqqiid3OhADV3RfLJnjiw63cSpi+fDTRC0=
 github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7+kN2VEUnK/pcBlmesArF7c=
 github.com/fatih/color v1.7.0/go.mod h1:Zm6kSWBoL9eyXnKyktHP6abPY2pDugNf5KwzbycvMj4=
@@ -57,9 +53,8 @@ github.com/google/go-cmp v0.5.6/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/
 github.com/google/uuid v1.1.2/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/grpc-ecosystem/grpc-gateway v1.16.0/go.mod h1:BDjrQk3hbvj6Nolgz8mAMFbcEtjT1g+wF4CSlocrBnw=
 github.com/hashicorp/go-hclog v0.14.1/go.mod h1:whpDNt7SSdeAju8AWKIWsul05p54N/39EeqMAyrmvFQ=
-github.com/hashicorp/go-hclog v1.0.0/go.mod h1:whpDNt7SSdeAju8AWKIWsul05p54N/39EeqMAyrmvFQ=
-github.com/hashicorp/go-hclog v1.1.0 h1:QsGcniKx5/LuX2eYoeL+Np3UKYPNaN7YKpTh29h8rbw=
-github.com/hashicorp/go-hclog v1.1.0/go.mod h1:whpDNt7SSdeAju8AWKIWsul05p54N/39EeqMAyrmvFQ=
+github.com/hashicorp/go-hclog v1.2.0 h1:La19f8d7WIlm4ogzNHB0JGqs5AUDAZ2UfCY4sJXcJdM=
+github.com/hashicorp/go-hclog v1.2.0/go.mod h1:whpDNt7SSdeAju8AWKIWsul05p54N/39EeqMAyrmvFQ=
 github.com/hashicorp/go-plugin v1.4.3 h1:DXmvivbWD5qdiBts9TpBC7BYL1Aia5sxbRgQB+v6UZM=
 github.com/hashicorp/go-plugin v1.4.3/go.mod h1:5fGEH17QVwTTcR0zV7yhDPLLmFX9YSZ38b18Udy6vYQ=
 github.com/hashicorp/yamux v0.0.0-20180604194846-3520598351bb/go.mod h1:+NfK9FKeTrX5uv1uIXGdwYDTeHna2qgaIlx54MXqjAM=
@@ -88,7 +83,6 @@ github.com/prometheus/client_model v0.0.0-20190812154241-14fe0d1b01d4/go.mod h1:
 github.com/rogpeppe/fastuuid v1.2.0/go.mod h1:jVj6XXZzXRy/MSR5jhDC/2q6DgLz+nrA6LYCDYWNEvQ=
 github.com/sftpgo/sdk v0.1.0 h1:t94VfxsmNbCYLYRDr3x/UTwSbFFtL9DJ171zkQ3MchQ=
 github.com/sftpgo/sdk v0.1.0/go.mod h1:Bhgac6kiwIziILXLzH4wepT8lQXyhF83poDXqZorN6Q=
-github.com/spaolacci/murmur3 v0.0.0-20180118202830-f09979ecbc72/go.mod h1:JwIasOWyU6f++ZhiEuf87xNszmSA2myDM2Kzu9HwQUA=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
@@ -111,9 +105,8 @@ golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn
 golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.0.0-20200822124328-c89045814202/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
 golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4/go.mod h1:p54w0d4576C0XHj96bSt6lcn1PtDYWL6XObtHCRCNQM=
-golang.org/x/net v0.0.0-20220105145211-5b0dc2dfae98/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
-golang.org/x/net v0.0.0-20220127200216-cd36cc0744dd h1:O7DYs+zxREGLKzKoMQrtrEacpb0ZVXA5rIwylE2Xchk=
-golang.org/x/net v0.0.0-20220127200216-cd36cc0744dd/go.mod h1:CfG3xpIq0wQ8r1q4Su4UZFWDARRcnwPjda9FqA0JpMk=
+golang.org/x/net v0.0.0-20220225172249-27dd8689420f h1:oA4XRj0qtSt8Yo1Zms0CUlsT3KG69V2UGQWPBxujDmc=
+golang.org/x/net v0.0.0-20220225172249-27dd8689420f/go.mod h1:CfG3xpIq0wQ8r1q4Su4UZFWDARRcnwPjda9FqA0JpMk=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20200107190931-bf48bf16ab8d/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
 golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
@@ -130,20 +123,15 @@ golang.org/x/sys v0.0.0-20200223170610-d5e6a3e2c0ae/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210330210617-4fbd30eecc44/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210510120138-977fb7262007/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20210927094055-39ccf1dd6fa6/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20211216021012-1d35b9e2eb4e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20220209214540-3681064d5158 h1:rm+CHSpPEEW2IsXUib1ThaHIjuBVZjxNgSKmBLFfD4c=
-golang.org/x/sys v0.0.0-20220209214540-3681064d5158/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20220319134239-a9b59b0215f8 h1:OH54vjqzRWmbJ62fjuhxy7AxFFgoHN0/DPc/UrL8cAs=
+golang.org/x/sys v0.0.0-20220319134239-a9b59b0215f8/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
-golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.3.5/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
-golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.3.7 h1:olpwvP2KacW1ZWvsR7uQhoyTYvKAupfQrRGBFM352Gk=
 golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
@@ -161,9 +149,8 @@ google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoA
 google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc=
 google.golang.org/genproto v0.0.0-20200513103714-09dca8ec2884/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
 google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013/go.mod h1:NbSheEEYHJ7i3ixzK3sjbqSGDJWnxyFXZblF3eUsNvo=
-google.golang.org/genproto v0.0.0-20211223182754-3ac035c7e7cb/go.mod h1:5CzLGKJ67TSI2B9POpiiyGha0AjJvZIUgRMt1dSmuhc=
-google.golang.org/genproto v0.0.0-20220211171837-173942840c17 h1:2X+CNIheCutWRyKRte8szGxrE5ggtV4U+NKAbh/oLhg=
-google.golang.org/genproto v0.0.0-20220211171837-173942840c17/go.mod h1:kGP+zUP2Ddo0ayMi4YuN7C3WZyJvGLZRh8Z5wnAqvEI=
+google.golang.org/genproto v0.0.0-20220322021311-435b647f9ef2 h1:3n0D2NdPGm0g0wrVJzXJWW5CBOoqgGBkDX9cRMJHZAY=
+google.golang.org/genproto v0.0.0-20220322021311-435b647f9ef2/go.mod h1:hAL49I2IFola2sVEjAn7MEwsja0xp51I0tlGAf9hz4E=
 google.golang.org/grpc v1.8.0/go.mod h1:yo6s7OP7yaDglbqo1J04qKzAhqBH6lvTonzMVmEdcZw=
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
 google.golang.org/grpc v1.23.0/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
@@ -172,10 +159,8 @@ google.golang.org/grpc v1.27.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8
 google.golang.org/grpc v1.27.1/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
 google.golang.org/grpc v1.33.1/go.mod h1:fr5YgcSWrqhRRxogOsw7RzIpsmvOZ6IcH4kBYTpR3n0=
 google.golang.org/grpc v1.36.0/go.mod h1:qjiiYl8FncCW8feJPdyg3v6XW24KsRHe+dy9BAGRRjU=
-google.golang.org/grpc v1.40.0/go.mod h1:ogyxbiOoUXAkP+4+xa6PZSE9DZgIHtSpzjDTB9KAK34=
-google.golang.org/grpc v1.43.0/go.mod h1:k+4IHHFw41K8+bbowsex27ge2rCb65oeWqe4jJ590SU=
-google.golang.org/grpc v1.44.0 h1:weqSxi/TMs1SqFRMHCtBgXRs8k3X39QIDEZ0pRcttUg=
-google.golang.org/grpc v1.44.0/go.mod h1:k+4IHHFw41K8+bbowsex27ge2rCb65oeWqe4jJ590SU=
+google.golang.org/grpc v1.45.0 h1:NEpgUqV3Z+ZjkqMsxMg11IaDrXY4RY6CQukSGK0uI1M=
+google.golang.org/grpc v1.45.0/go.mod h1:lN7owxKUQEqMfSyQikvvk5tf/6zMPsrK+ONuO11+0rQ=
 google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
 google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
 google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=
@@ -187,8 +172,9 @@ google.golang.org/protobuf v1.23.1-0.20200526195155-81db48ad09cc/go.mod h1:EGpAD
 google.golang.org/protobuf v1.25.0/go.mod h1:9JNX74DMeImyA3h4bdi1ymwjUzf21/xIlbajtzgsN7c=
 google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
 google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
-google.golang.org/protobuf v1.27.1 h1:SnqbnDw1V7RiZcXPx5MEeqPv2s79L9i7BJUlG/+RurQ=
 google.golang.org/protobuf v1.27.1/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
+google.golang.org/protobuf v1.28.0 h1:w43yiav+6bVFTBQFZX0r7ipe9JQ1QsbMgHwbBziscLw=
+google.golang.org/protobuf v1.28.0/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.3/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=

tests/ipfilter/go.mod

@@ -0,0 +1,25 @@
+module github.com/drakkan/sftpgo/tests/ipfilter
+
+go 1.18
+
+require (
+	github.com/hashicorp/go-plugin v1.4.3
+	github.com/sftpgo/sdk v0.1.1-0.20220323095514-1e4782d9c52e
+)
+
+require (
+	github.com/fatih/color v1.13.0 // indirect
+	github.com/golang/protobuf v1.5.2 // indirect
+	github.com/hashicorp/go-hclog v1.2.0 // indirect
+	github.com/hashicorp/yamux v0.0.0-20211028200310-0bc27b27de87 // indirect
+	github.com/mattn/go-colorable v0.1.12 // indirect
+	github.com/mattn/go-isatty v0.0.14 // indirect
+	github.com/mitchellh/go-testing-interface v1.14.1 // indirect
+	github.com/oklog/run v1.1.0 // indirect
+	golang.org/x/net v0.0.0-20220225172249-27dd8689420f // indirect
+	golang.org/x/sys v0.0.0-20220319134239-a9b59b0215f8 // indirect
+	golang.org/x/text v0.3.7 // indirect
+	google.golang.org/genproto v0.0.0-20220322021311-435b647f9ef2 // indirect
+	google.golang.org/grpc v1.45.0 // indirect
+	google.golang.org/protobuf v1.28.0 // indirect
+)

tests/ipfilter/go.sum

@@ -0,0 +1,183 @@
+cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/antihax/optional v1.0.0/go.mod h1:uupD/76wgC+ih3iEmQUL+0Ugr19nfwCT1kdvxnR2qWY=
+github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
+github.com/cespare/xxhash/v2 v2.1.1/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
+github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
+github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f/go.mod h1:M8M6+tZqaGXZJjfX53e64911xZQV5JYwmTeXPW+k8Sc=
+github.com/cncf/udpa/go v0.0.0-20201120205902-5459f2c99403/go.mod h1:WmhPx2Nbnhtbo57+VJT5O0JRkEi1Wbu0z5j0R8u5Hbk=
+github.com/cncf/udpa/go v0.0.0-20210930031921-04548b0d99d4/go.mod h1:6pvJx4me5XPnfI9Z40ddWsdw2W/uZgQLFXToKeRcDiI=
+github.com/cncf/xds/go v0.0.0-20210805033703-aa0b78936158/go.mod h1:eXthEFrGJvWHgFFCl3hGmgk+/aYT6PnTQLykKQRLhEs=
+github.com/cncf/xds/go v0.0.0-20210922020428-25de7278fc84/go.mod h1:eXthEFrGJvWHgFFCl3hGmgk+/aYT6PnTQLykKQRLhEs=
+github.com/cncf/xds/go v0.0.0-20211011173535-cb28da3451f1/go.mod h1:eXthEFrGJvWHgFFCl3hGmgk+/aYT6PnTQLykKQRLhEs=
+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=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/envoyproxy/go-control-plane v0.9.0/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
+github.com/envoyproxy/go-control-plane v0.9.1-0.20191026205805-5f8ba28d4473/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
+github.com/envoyproxy/go-control-plane v0.9.4/go.mod h1:6rpuAdCZL397s3pYoYcLgu1mIlRU8Am5FuJP05cCM98=
+github.com/envoyproxy/go-control-plane v0.9.9-0.20201210154907-fd9021fe5dad/go.mod h1:cXg6YxExXjJnVBQHBLXeUAgxn2UodCpnH306RInaBQk=
+github.com/envoyproxy/go-control-plane v0.9.10-0.20210907150352-cf90f659a021/go.mod h1:AFq3mo9L8Lqqiid3OhADV3RfLJnjiw63cSpi+fDTRC0=
+github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7+kN2VEUnK/pcBlmesArF7c=
+github.com/fatih/color v1.7.0/go.mod h1:Zm6kSWBoL9eyXnKyktHP6abPY2pDugNf5KwzbycvMj4=
+github.com/fatih/color v1.13.0 h1:8LOYc1KYPPmyKMuN8QV2DNRWNbLo6LZ0iLs8+mlH53w=
+github.com/fatih/color v1.13.0/go.mod h1:kLAiJbzzSOZDVNGyDpeOxJ47H46qBXwg5ILebYFFOfk=
+github.com/ghodss/yaml v1.0.0/go.mod h1:4dBDuWmgqj2HViK6kFavaiC9ZROes6MMH2rRYeMEF04=
+github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
+github.com/golang/mock v1.1.1/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A=
+github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
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tests/ipfilter/main.go

@@ -0,0 +1,28 @@
+package main
+
+import (
+	"fmt"
+
+	"github.com/hashicorp/go-plugin"
+	"github.com/sftpgo/sdk/plugin/ipfilter"
+)
+
+type Filter struct{}
+
+func (f *Filter) CheckIP(ip string) error {
+	if ip == "192.168.1.12" {
+		return fmt.Errorf("ip %#v is not allowed", ip)
+	}
+	return nil
+}
+
+func main() {
+	plugin.Serve(&plugin.ServeConfig{
+		HandshakeConfig: ipfilter.Handshake,
+		Plugins: map[string]plugin.Plugin{
+			ipfilter.PluginName: &ipfilter.Plugin{Impl: &Filter{}},
+		},
+		GRPCServer: plugin.DefaultGRPCServer,
+	})
+
+}