introduce first docker plugin

e2e/docker-compose.yml

@@ -7,6 +7,10 @@ services:
       - PASSWORD_ACCESS=true
       - USER_PASSWORD=pass
       - USER_NAME=user
+    labels:
+      - sshpiper.username=pass
+      - sshpiper.container_username=user
+      - sshpiper.port=2222
     volumes:
       - shared:/shared
       - sshconfig_password:/config
@@ -32,7 +36,9 @@ services:
       - shared:/shared
       - sshconfig_publickey:/sshconfig_publickey
       - sshconfig_password:/sshconfig_password
+      - /var/run/docker.sock:/var/run/docker.sock
     command: ["./e2eentry.sh"]
+    privileged: true
     working_dir: /src/e2e
     depends_on:
       - host-publickey

e2e/docker_test.go

@@ -0,0 +1,57 @@
+package e2e_test
+
+import (
+	"fmt"
+	"testing"
+	"time"
+
+	"github.com/google/uuid"
+)
+
+func TestDocker(t *testing.T) {
+	piperaddr, piperport := nextAvailablePiperAddress()
+
+	piper, _, _, err := runCmd("/sshpiperd/sshpiperd",
+		"-p",
+		piperport,
+		"/sshpiperd/plugins/docker",
+	)
+
+	if err != nil {
+		t.Errorf("failed to run sshpiperd: %v", err)
+	}
+
+	defer killCmd(piper)
+
+	waitForEndpointReady(piperaddr)
+
+	randtext := uuid.New().String()
+	targetfie := uuid.New().String()
+
+	c, stdin, stdout, err := runCmd(
+		"ssh",
+		"-v",
+		"-o",
+		"StrictHostKeyChecking=no",
+		"-o",
+		"UserKnownHostsFile=/dev/null",
+		"-p",
+		piperport,
+		"-l",
+		"pass",
+		"127.0.0.1",
+		fmt.Sprintf(`sh -c "echo -n %v > /shared/%v"`, randtext, targetfie),
+	)
+
+	if err != nil {
+		t.Errorf("failed to ssh to piper-fixed, %v", err)
+	}
+
+	defer killCmd(c)
+
+	enterPassword(stdin, stdout, "pass")
+
+	time.Sleep(time.Second) // wait for file flush
+
+	checkSharedFileContent(t, targetfie, randtext)
+}

go.mod

@@ -8,6 +8,7 @@ require (
 	github.com/Azure/azure-sdk-for-go/sdk/azcore v1.1.1
 	github.com/Azure/azure-sdk-for-go/sdk/azidentity v1.1.0
 	github.com/creack/pty v1.1.18
+	github.com/docker/docker v20.10.17+incompatible
 	github.com/google/uuid v1.3.0
 	github.com/microsoft/kiota-authentication-azure-go v0.3.1
 	github.com/microsoftgraph/msgraph-sdk-go v0.28.0
@@ -25,9 +26,14 @@ require (
 require (
 	github.com/Azure/azure-sdk-for-go/sdk/internal v1.0.0 // indirect
 	github.com/AzureAD/microsoft-authentication-library-for-go v0.5.1 // indirect
+	github.com/Microsoft/go-winio v0.5.2 // indirect
 	github.com/cjlapao/common-go v0.0.20 // indirect
 	github.com/cpuguy83/go-md2man/v2 v2.0.2 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/docker/distribution v2.8.1+incompatible // indirect
+	github.com/docker/go-connections v0.4.0 // indirect
+	github.com/docker/go-units v0.4.0 // indirect
+	github.com/gogo/protobuf v1.3.2 // indirect
 	github.com/golang-jwt/jwt v3.2.1+incompatible // indirect
 	github.com/golang/protobuf v1.5.2 // indirect
 	github.com/kylelemons/godebug v1.1.0 // indirect
@@ -36,7 +42,12 @@ require (
 	github.com/microsoft/kiota-serialization-json-go v0.5.3 // indirect
 	github.com/microsoft/kiota-serialization-text-go v0.4.1 // indirect
 	github.com/microsoftgraph/msgraph-sdk-go-core v0.26.1 // indirect
+	github.com/moby/term v0.0.0-20210619224110-3f7ff695adc6 // indirect
+	github.com/morikuni/aec v1.0.0 // indirect
+	github.com/opencontainers/go-digest v1.0.0 // indirect
+	github.com/opencontainers/image-spec v1.0.2 // indirect
 	github.com/pkg/browser v0.0.0-20210115035449-ce105d075bb4 // indirect
+	github.com/pkg/errors v0.9.1 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/russross/blackfriday/v2 v2.1.0 // indirect
 	github.com/stretchr/testify v1.7.2 // indirect
@@ -45,5 +56,7 @@ require (
 	golang.org/x/net v0.0.0-20220425223048-2871e0cb64e4 // indirect
 	golang.org/x/sys v0.0.0-20211216021012-1d35b9e2eb4e // indirect
 	golang.org/x/text v0.3.7 // indirect
+	golang.org/x/time v0.0.0-20220609170525-579cf78fd858 // indirect
 	google.golang.org/genproto v0.0.0-20211001223012-bfb93cce50d9 // indirect
+	gotest.tools/v3 v3.3.0 // indirect
 )

go.sum

@@ -6,9 +6,13 @@ github.com/Azure/azure-sdk-for-go/sdk/azidentity v1.1.0 h1:QkAcEIAKbNL4KoFr4Sath
 github.com/Azure/azure-sdk-for-go/sdk/azidentity v1.1.0/go.mod h1:bhXu1AjYL+wutSL/kpSq6s7733q2Rb0yuot9Zgfqa/0=
 github.com/Azure/azure-sdk-for-go/sdk/internal v1.0.0 h1:jp0dGvZ7ZK0mgqnTSClMxa5xuRL7NZgHameVYF6BurY=
 github.com/Azure/azure-sdk-for-go/sdk/internal v1.0.0/go.mod h1:eWRD7oawr1Mu1sLCawqVc0CUiF43ia3qQMxLscsKQ9w=
+github.com/Azure/go-ansiterm v0.0.0-20210617225240-d185dfc1b5a1 h1:UQHMgLO+TxOElx5B5HZ4hJQsoJ/PvUvKRhJHDQXO8P8=
+github.com/Azure/go-ansiterm v0.0.0-20210617225240-d185dfc1b5a1/go.mod h1:xomTg63KZ2rFqZQzSB4Vz2SUXa1BpHTVz9L5PTmPC4E=
 github.com/AzureAD/microsoft-authentication-library-for-go v0.5.1 h1:BWe8a+f/t+7KY7zH2mqygeUD0t8hNFXe08p1Pb3/jKE=
 github.com/AzureAD/microsoft-authentication-library-for-go v0.5.1/go.mod h1:Vt9sXTKwMyGcOxSmLDMnGPgqsUg7m8pe215qMLrDXw4=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/Microsoft/go-winio v0.5.2 h1:a9IhgEQBCUEk6QCdml9CiJGhAws+YwffDHEMp1VMrpA=
+github.com/Microsoft/go-winio v0.5.2/go.mod h1:WpS1mjBmmwHBEWmogvA2mj8546UReBk4v8QkMxJ6pZY=
 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=
@@ -26,12 +30,21 @@ github.com/cncf/xds/go v0.0.0-20211001041855-01bcc9b48dfe/go.mod h1:eXthEFrGJvWH
 github.com/cncf/xds/go v0.0.0-20211011173535-cb28da3451f1/go.mod h1:eXthEFrGJvWHgFFCl3hGmgk+/aYT6PnTQLykKQRLhEs=
 github.com/cpuguy83/go-md2man/v2 v2.0.2 h1:p1EgwI/C7NhT0JmVkwCD2ZBK8j4aeHQX2pMHHBfMQ6w=
 github.com/cpuguy83/go-md2man/v2 v2.0.2/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
+github.com/creack/pty v1.1.11/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
 github.com/creack/pty v1.1.18 h1:n56/Zwd5o6whRC5PMGretI4IdRLlmBXYNjScPaBgsbY=
 github.com/creack/pty v1.1.18/go.mod h1:MOBLtS5ELjhRRrroQr9kyvTxUAFNvYEK993ew/Vr4O4=
 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/dnaeon/go-vcr v1.1.0 h1:ReYa/UBrRyQdant9B4fNHGoCNKw6qh6P0fsdGmZpR7c=
+github.com/docker/distribution v2.8.1+incompatible h1:Q50tZOPR6T/hjNsyc9g8/syEs6bk8XXApsHjKukMl68=
+github.com/docker/distribution v2.8.1+incompatible/go.mod h1:J2gT2udsDAN96Uj4KfcMRqY0/ypR+oyYUYmja8H+y+w=
+github.com/docker/docker v20.10.17+incompatible h1:JYCuMrWaVNophQTOrMMoSwudOVEfcegoZZrleKc1xwE=
+github.com/docker/docker v20.10.17+incompatible/go.mod h1:eEKB0N0r5NX/I1kEveEz05bcu8tLC/8azJZsviup8Sk=
+github.com/docker/go-connections v0.4.0 h1:El9xVISelRB7BuFusrZozjnkIM5YnzCViNKohAFqRJQ=
+github.com/docker/go-connections v0.4.0/go.mod h1:Gbd7IOopHjR8Iph03tsViu4nIes5XhDvyHbTtUxmeec=
+github.com/docker/go-units v0.4.0 h1:3uh0PgVws3nIA0Q+MwDC8yjEPf9zjRfZZWXZYDct3Tw=
+github.com/docker/go-units v0.4.0/go.mod h1:fgPhTUdO+D/Jk86RDLlptpiXQzgHJF7gydDDbaIK4Dk=
 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=
@@ -40,6 +53,8 @@ github.com/envoyproxy/go-control-plane v0.9.9-0.20210512163311-63b5d3c536b0/go.m
 github.com/envoyproxy/go-control-plane v0.10.2-0.20220325020618-49ff273808a1/go.mod h1:KJwIaB5Mv44NWtYuAOFCVOjcI94vtpEz2JU/D2v6IjE=
 github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7+kN2VEUnK/pcBlmesArF7c=
 github.com/ghodss/yaml v1.0.0/go.mod h1:4dBDuWmgqj2HViK6kFavaiC9ZROes6MMH2rRYeMEF04=
+github.com/gogo/protobuf v1.3.2 h1:Ov1cvc58UF3b5XjBnZv7+opcTcQFZebYjWzi34vdm4Q=
+github.com/gogo/protobuf v1.3.2/go.mod h1:P1XiOD3dCwIKUDQYPy72D8LYyHL2YPYrpS2s69NZV8Q=
 github.com/golang-jwt/jwt v3.2.1+incompatible h1:73Z+4BJcrTC+KczS6WvTPvRGOp1WmfEP4Q1lOd9Z/+c=
 github.com/golang-jwt/jwt v3.2.1+incompatible/go.mod h1:8pz2t5EyA70fFQQSrl6XZXzqecmYZeUEB8OUGHkxJ+I=
 github.com/golang-jwt/jwt/v4 v4.2.0 h1:besgBTC8w8HjP6NzQdxwKH9Z5oQMZ24ThTrHp3cZ8eU=
@@ -72,6 +87,8 @@ github.com/google/uuid v1.1.2/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+
 github.com/google/uuid v1.3.0 h1:t6JiXgmwXMjEs8VusXIJk2BXHsn+wx8BZdTaoZ5fu7I=
 github.com/google/uuid v1.3.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/grpc-ecosystem/grpc-gateway v1.16.0/go.mod h1:BDjrQk3hbvj6Nolgz8mAMFbcEtjT1g+wF4CSlocrBnw=
+github.com/kisielk/errcheck v1.5.0/go.mod h1:pFxgyoBC7bSaBwPgfKdkLd5X25qrDl4LWUI2bnpBCr8=
+github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
 github.com/kylelemons/godebug v1.1.0 h1:RPNrshWIDI6G2gRW9EHilWtl7Z6Sb1BR0xunSBf0SNc=
 github.com/kylelemons/godebug v1.1.0/go.mod h1:9/0rRGxNHcop5bhtWyNeEfOS8JIWk580+fNqagV/RAw=
 github.com/microsoft/kiota-abstractions-go v0.8.1 h1:ACCwRwddJYOx+SRqfgcR8Wo8PZTd4g+JMa8lY8ABy+4=
@@ -88,22 +105,35 @@ github.com/microsoftgraph/msgraph-sdk-go v0.28.0 h1:BolP/vNW7gsNXivg/qikcdftOicL
 github.com/microsoftgraph/msgraph-sdk-go v0.28.0/go.mod h1:MB2iPD8vd8RTRAqlKTZfhLvE8OBiC/vjaOy8+J+nF1k=
 github.com/microsoftgraph/msgraph-sdk-go-core v0.26.1 h1:wzEoPk6uyd+SkBur9NpzpPfKseUQYT1yjFkDUueLpfk=
 github.com/microsoftgraph/msgraph-sdk-go-core v0.26.1/go.mod h1:cKWHZ9CfJnSvBJxzXnAXRA+SSy8JeAbS+4kOn3uyOIY=
+github.com/moby/term v0.0.0-20210619224110-3f7ff695adc6 h1:dcztxKSvZ4Id8iPpHERQBbIJfabdt4wUm5qy3wOL2Zc=
+github.com/moby/term v0.0.0-20210619224110-3f7ff695adc6/go.mod h1:E2VnQOmVuvZB6UYnnDB0qG5Nq/1tD9acaOpo6xmt0Kw=
 github.com/montanaflynn/stats v0.6.6/go.mod h1:etXPPgVO6n31NxCd9KQUMvCM+ve0ruNzt6R8Bnaayow=
+github.com/morikuni/aec v1.0.0 h1:nP9CBfwrvYnBRgY6qfDQkygYDmYwOilePFkwzv4dU8A=
+github.com/morikuni/aec v1.0.0/go.mod h1:BbKIizmSmc5MMPqRYbxO4ZU0S0+P200+tUnFx7PXmsc=
+github.com/opencontainers/go-digest v1.0.0 h1:apOUWs51W5PlhuyGyz9FCeeBIOUDA/6nW8Oi/yOhh5U=
+github.com/opencontainers/go-digest v1.0.0/go.mod h1:0JzlMkj0TRzQZfJkVvzbP0HBR3IKzErnv2BNG4W4MAM=
+github.com/opencontainers/image-spec v1.0.2 h1:9yCKha/T5XdGtO0q9Q9a6T5NUCsTn/DrBg0D7ufOcFM=
+github.com/opencontainers/image-spec v1.0.2/go.mod h1:BtxoFyWECRxE4U/7sNtV5W15zMzWCbyJoFRP3s7yZA0=
 github.com/patrickmn/go-cache v2.1.0+incompatible h1:HRMgzkcYKYpi3C8ajMPV8OFXaaRUnok+kx1WdO15EQc=
 github.com/patrickmn/go-cache v2.1.0+incompatible/go.mod h1:3Qf8kWWT7OJRJbdiICTKqZju1ZixQ/KpMGzzAfe6+WQ=
 github.com/pires/go-proxyproto v0.6.2 h1:KAZ7UteSOt6urjme6ZldyFm4wDe/z0ZUP0Yv0Dos0d8=
 github.com/pires/go-proxyproto v0.6.2/go.mod h1:Odh9VFOZJCf9G8cLW5o435Xf1J95Jw9Gw5rnCjcwzAY=
 github.com/pkg/browser v0.0.0-20210115035449-ce105d075bb4 h1:Qj1ukM4GlMWXNdMBuXcXfz/Kw9s1qm0CLY32QxuSImI=
 github.com/pkg/browser v0.0.0-20210115035449-ce105d075bb4/go.mod h1:N6UoU20jOqggOuDwUaBQpluzLNDqif3kq9z2wpdYEfQ=
+github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
+github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
+github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/prometheus/client_model v0.0.0-20190812154241-14fe0d1b01d4/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA=
 github.com/rogpeppe/fastuuid v1.2.0/go.mod h1:jVj6XXZzXRy/MSR5jhDC/2q6DgLz+nrA6LYCDYWNEvQ=
 github.com/russross/blackfriday/v2 v2.1.0 h1:JIOH55/0cWyOuilr9/qlrm0BSXldqnqwMsf35Ld67mk=
 github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
+github.com/sirupsen/logrus v1.7.0/go.mod h1:yWOB1SBYBC5VeMP7gHvWumXLIWorT60ONWic61uBYv0=
 github.com/sirupsen/logrus v1.8.1 h1:dJKuHgqk1NNQlqoA6BTlM1Wf9DOH3NBjQyu0h9+AZZE=
 github.com/sirupsen/logrus v1.8.1/go.mod h1:yWOB1SBYBC5VeMP7gHvWumXLIWorT60ONWic61uBYv0=
 github.com/spaolacci/murmur3 v0.0.0-20180118202830-f09979ecbc72/go.mod h1:JwIasOWyU6f++ZhiEuf87xNszmSA2myDM2Kzu9HwQUA=
+github.com/spf13/pflag v1.0.3/go.mod h1:DYY7MBk1bdzusC3SYhjObp+wFpr4gzcvqqNjLnInEg4=
 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 v1.5.1/go.mod h1:5W2xD1RspED5o8YsWQXVCued0rvSQ+mT+I5cxcmMvtA=
@@ -118,16 +148,22 @@ github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673 h1:bAn7/zixMGCfxrRT
 github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673/go.mod h1:N3UwUGtsrSj3ccvlPHLoLsHnpR27oXr4ZE984MbSER8=
 github.com/yosida95/uritemplate/v3 v3.0.2 h1:Ed3Oyj9yrmi9087+NczuL5BwkIc4wvTb5zIM+UJPGz4=
 github.com/yosida95/uritemplate/v3 v3.0.2/go.mod h1:ILOh0sOhIJR3+L/8afwt/kE++YT040gmv5BQTMR2HP4=
+github.com/yuin/goldmark v1.1.27/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
+github.com/yuin/goldmark v1.2.1/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 go.opentelemetry.io/proto/otlp v0.7.0/go.mod h1:PqfVotwruBrMGOCsRd/89rSnXhoiJIqeYNgFYFoEGnI=
 golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
 golang.org/x/lint v0.0.0-20190227174305-5b3e6a55c961/go.mod h1:wehouNa3lNwaWXcvxsM5YxQ5yQlVC4a0KAMCusXpPoU=
 golang.org/x/lint v0.0.0-20190313153728-d0100b6bd8b3/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
+golang.org/x/mod v0.2.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
+golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180826012351-8a410e7b638d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20190108225652-1e06a53dbb7e/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20190213061140-3a22650c66bd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
+golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
+golang.org/x/net v0.0.0-20200226121028-0de0cce0169b/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20200822124328-c89045814202/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
 golang.org/x/net v0.0.0-20201021035429-f5854403a974/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
 golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4/go.mod h1:p54w0d4576C0XHj96bSt6lcn1PtDYWL6XObtHCRCNQM=
@@ -140,6 +176,8 @@ golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJ
 golang.org/x/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20191026070338-33540a1f6037/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
@@ -152,6 +190,7 @@ golang.org/x/sys v0.0.0-20210330210617-4fbd30eecc44/go.mod h1:h1NjWce9XRLGQEsW7w
 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 v0.0.0-20210616094352-59db8d763f22/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20211216021012-1d35b9e2eb4e h1:fLOSk5Q00efkSvAm+4xcoXD+RRmLmmulPn5I3Y9F2EM=
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 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
@@ -162,11 +201,20 @@ 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/time v0.0.0-20220609170525-579cf78fd858 h1:Dpdu/EMxGMFgq0CeYMh4fazTD2vtlZRYE7wyynxJb9U=
+golang.org/x/time v0.0.0-20220609170525-579cf78fd858/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20190114222345-bf090417da8b/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20190226205152-f727befe758c/go.mod h1:9Yl7xja0Znq3iFh3HoIrodX9oNMXvdceNzlUR8zjMvY=
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 golang.org/x/tools v0.0.0-20190524140312-2c0ae7006135/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
+golang.org/x/tools v0.0.0-20190624222133-a101b041ded4/go.mod h1:/rFqwRUd4F7ZHNgwSSTFct+R/Kf4OFW1sUzUTQQTgfc=
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+golang.org/x/tools v0.0.0-20200619180055-7c47624df98f/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
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+golang.org/x/tools v0.1.0/go.mod h1:xkSsbof2nBLbhDlRMhhhyNLN/zl3eTqcnHD5viDpcZ0=
+golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
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@@ -209,5 +257,8 @@ gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
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 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gotest.tools/v3 v3.0.2/go.mod h1:3SzNCllyD9/Y+b5r9JIKQ474KzkZyqLqEfYqMsX94Bk=
+gotest.tools/v3 v3.3.0 h1:MfDY1b1/0xN1CyMlQDac0ziEy9zJQd9CXBRRDHw2jJo=
+gotest.tools/v3 v3.3.0/go.mod h1:Mcr9QNxkg0uMvy/YElmo4SpXgJKWgQvYrT7Kw5RzJ1A=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
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plugin/docker/README.md

@@ -0,0 +1,40 @@
+# docker plugin for sshpiperd
+
+This plugin queries dockerd for containers and creates pipes to them.
+
+## Usage
+
+```
+sshpiperd docker
+```
+
+start a container with sshpiper labels
+
+```
+docker run -d -e USER_NAME=user -e USER_PASSWORD=pass -e PASSWORD_ACCESS=true -l sshpiper.username=pass -l sshpiper.container_username=user -l sshpiper.port=2222 lscr.io/linuxserver/openssh-server
+```
+
+connect to piper
+
+```
+ssh -l pass piper
+```
+
+### Config docker connection
+
+Docker connection is configured with environment variables below:
+
+<https://pkg.go.dev/github.com/docker/docker/client#FromEnv>
+
+ * DOCKER_HOST: to set the url to the docker server, default "unix:///var/run/docker.sock"
+ * DOCKER_API_VERSION: to set the version of the API to reach, leave empty for latest.
+ * DOCKER_CERT_PATH: to load the TLS certificates from.
+ * DOCKER_TLS_VERIFY: to enable or disable TLS verification, off by default.
+
+### Container Labels for plugin
+
+ * sshpiper.username: username to filter containers by `downstream`'s username. left empty to auth with `authorized_keys` only.
+ * sshpiper.container_username: username of container's sshd
+ * sshpiper.port: port of container's sshd
+ * sshpiper.authorized_keys: authorized_keys to verify against `downstream`. in base64 format
+ * sshpiper.private_key: private_key to sent to container's sshd. in base64 format

plugin/docker/docker.go

@@ -0,0 +1,192 @@
+package main
+
+import (
+	"bytes"
+	"context"
+	"encoding/base64"
+	"fmt"
+	"net"
+	"time"
+
+	"github.com/docker/docker/api/types"
+	"github.com/docker/docker/client"
+	"github.com/patrickmn/go-cache"
+	log "github.com/sirupsen/logrus"
+	"github.com/tg123/sshpiper/libplugin"
+	"golang.org/x/crypto/ssh"
+)
+
+type pipe struct {
+	ClientUsername    string
+	ContainerUsername string
+	Host              string
+	AuthorizedKeys    string
+	PrivateKey        string
+}
+
+type plugin struct {
+	dockerCli *client.Client
+	cache     *cache.Cache
+}
+
+func newDockerPlugin() (*plugin, error) {
+	cli, err := client.NewClientWithOpts(client.FromEnv)
+	if err != nil {
+		return nil, err
+	}
+	return &plugin{
+		dockerCli: cli,
+		cache:     cache.New(1*time.Minute, 10*time.Minute),
+	}, nil
+}
+
+func (p *plugin) listPipes() ([]pipe, error) {
+	// filter := filters.NewArgs()
+	// filter.Add("label", fmt.Sprintf("sshpiper.username=%v", username))
+
+	containers, err := p.dockerCli.ContainerList(context.Background(), types.ContainerListOptions{
+		// Filters: filter,
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	var pipes []pipe
+	for _, c := range containers {
+		// TODO: support env?
+		p := pipe{}
+		p.ClientUsername = c.Labels["sshpiper.username"]
+		p.ContainerUsername = c.Labels["sshpiper.container_username"]
+		p.AuthorizedKeys = c.Labels["sshpiper.authorized_keys"]
+		p.PrivateKey = c.Labels["sshpiper.private_key"]
+
+		if p.ClientUsername == "" && p.AuthorizedKeys == "" {
+			log.Debugf("skipping container %v without sshpiper.username or sshpiper.authorized_keys or sshpiper.private_key", c.ID)
+			continue
+		}
+
+		if p.AuthorizedKeys != "" && p.PrivateKey == "" {
+			log.Errorf("skipping container %v without sshpiper.private_key but has sshpiper.authorized_keys", c.ID)
+			continue
+		}
+
+		for _, network := range c.NetworkSettings.Networks {
+			if network.IPAddress != "" {
+				port := c.Labels["sshpiper.port"]
+				if port == "" {
+					p.Host = network.IPAddress // default 22
+				} else {
+					p.Host = net.JoinHostPort(network.IPAddress, port)
+				}
+			}
+		}
+
+		pipes = append(pipes, p)
+	}
+
+	return pipes, nil
+}
+
+func (p *plugin) supportedMethods() ([]string, error) {
+	pipes, err := p.listPipes()
+	if err != nil {
+		return nil, err
+	}
+
+	set := make(map[string]bool)
+
+	for _, pipe := range pipes {
+		if pipe.AuthorizedKeys != "" {
+			set["publickey"] = true // found authorized_keys, so we support publickey
+		} else {
+			set["password"] = true // no authorized_keys, so we support password
+		}
+	}
+
+	var methods []string
+	for k := range set {
+		methods = append(methods, k)
+	}
+	return methods, nil
+}
+
+func (p *plugin) createUpstream(conn libplugin.ConnMetadata, to pipe, originPassword string) (*libplugin.Upstream, error) {
+	host, port, err := libplugin.SplitHostPortForSSH(to.Host)
+	if err != nil {
+		return nil, err
+	}
+
+	u := &libplugin.Upstream{
+		Host:          host,
+		Port:          int32(port),
+		UserName:      to.ContainerUsername,
+		IgnoreHostKey: true,
+	}
+
+	// password found
+	if originPassword != "" {
+		u.Auth = libplugin.CreatePasswordAuth([]byte(originPassword))
+		return u, nil
+	}
+
+	// try private key
+	data, err := base64.StdEncoding.DecodeString(to.PrivateKey)
+	if err != nil {
+		return nil, err
+	}
+
+	if data != nil {
+		u.Auth = libplugin.CreatePrivateKeyAuth(data)
+		return u, nil
+	}
+
+	return nil, fmt.Errorf("no password or private key found")
+}
+
+func (p *plugin) findAndCreateUpstream(conn libplugin.ConnMetadata, password string, publicKey []byte) (*libplugin.Upstream, error) {
+	user := conn.User()
+
+	pipes, err := p.listPipes()
+	if err != nil {
+		return nil, err
+	}
+
+	for _, pipe := range pipes {
+
+		// test password
+		if publicKey == nil {
+			if pipe.ClientUsername != user {
+				continue
+			}
+
+			return p.createUpstream(conn, pipe, password)
+		}
+
+		// test public key
+		if pipe.ClientUsername != "" {
+			if pipe.ClientUsername != user {
+				continue
+			}
+		}
+
+		// ignore username and match all
+		rest, err := base64.RawStdEncoding.DecodeString(pipe.AuthorizedKeys)
+		if err != nil {
+			return nil, err
+		}
+
+		var authedPubkey ssh.PublicKey
+		for len(rest) > 0 {
+			authedPubkey, _, _, rest, err = ssh.ParseAuthorizedKey(rest)
+			if err != nil {
+				return nil, err
+			}
+
+			if bytes.Equal(authedPubkey.Marshal(), publicKey) {
+				return p.createUpstream(conn, pipe, "")
+			}
+		}
+	}
+
+	return nil, fmt.Errorf("no matching pipe for username [%v] found", user)
+}

plugin/docker/main.go

@@ -0,0 +1,35 @@
+package main
+
+import (
+	"github.com/tg123/sshpiper/libplugin"
+	"github.com/urfave/cli/v2"
+)
+
+func main() {
+
+	libplugin.CreateAndRunPluginTemplate(&libplugin.PluginTemplate{
+		Name:  "docker",
+		Usage: "sshpiperd docker plugin, see config in https://github.com/tg123/sshpiper/tree/master/plugin/docker",
+		CreateConfig: func(c *cli.Context) (*libplugin.SshPiperPluginConfig, error) {
+			plugin, err := newDockerPlugin()
+			if err != nil {
+				return nil, err
+			}
+
+			return &libplugin.SshPiperPluginConfig{
+
+				NextAuthMethodsCallback: func(_ libplugin.ConnMetadata) ([]string, error) {
+					return plugin.supportedMethods()
+				},
+
+				PasswordCallback: func(conn libplugin.ConnMetadata, password []byte) (*libplugin.Upstream, error) {
+					return plugin.findAndCreateUpstream(conn, string(password), nil)
+				},
+
+				PublicKeyCallback: func(conn libplugin.ConnMetadata, key []byte) (*libplugin.Upstream, error) {
+					return plugin.findAndCreateUpstream(conn, "", key)
+				},
+			}, nil
+		},
+	})
+}