teleport/lib/client/api_test.go

/*
 * Teleport
 * Copyright (C) 2023  Gravitational, Inc.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package client

import (
	"context"
	"crypto/x509"
	"errors"
	"fmt"
	"io"
	"math"
	"os"
	"testing"
	"time"

	"github.com/google/go-cmp/cmp"
	"github.com/gravitational/trace"
	"github.com/stretchr/testify/require"
	"golang.org/x/crypto/ssh"
	"golang.org/x/crypto/ssh/agent"

	"github.com/gravitational/teleport/api/client/webclient"
	"github.com/gravitational/teleport/api/types"
	"github.com/gravitational/teleport/lib/defaults"
	"github.com/gravitational/teleport/lib/events"
	"github.com/gravitational/teleport/lib/observability/tracing"
	"github.com/gravitational/teleport/lib/session"
	"github.com/gravitational/teleport/lib/utils"
)

func TestMain(m *testing.M) {
	utils.InitLoggerForTests()
	os.Exit(m.Run())
}

var parseProxyHostTestCases = []struct {
	name      string
	input     string
	expectErr bool
	expect    ParsedProxyHost
}{
	{
		name:      "Empty port string",
		input:     "example.org",
		expectErr: false,
		expect: ParsedProxyHost{
			Host:                     "example.org",
			UsingDefaultWebProxyPort: true,
			WebProxyAddr:             "example.org:3080",
			SSHProxyAddr:             "example.org:3023",
		},
	}, {
		name:      "Web proxy port only",
		input:     "example.org:1234",
		expectErr: false,
		expect: ParsedProxyHost{
			Host:                     "example.org",
			UsingDefaultWebProxyPort: false,
			WebProxyAddr:             "example.org:1234",
			SSHProxyAddr:             "example.org:3023",
		},
	}, {
		name:      "Web proxy port with whitespace",
		input:     "example.org: 1234",
		expectErr: false,
		expect: ParsedProxyHost{
			Host:                     "example.org",
			UsingDefaultWebProxyPort: false,
			WebProxyAddr:             "example.org:1234",
			SSHProxyAddr:             "example.org:3023",
		},
	}, {
		name:      "Web proxy port empty with whitespace",
		input:     "example.org:  ,200",
		expectErr: false,
		expect: ParsedProxyHost{
			Host:                     "example.org",
			UsingDefaultWebProxyPort: true,
			WebProxyAddr:             "example.org:3080",
			SSHProxyAddr:             "example.org:200",
		},
	}, {
		name:      "SSH port only",
		input:     "example.org:,200",
		expectErr: false,
		expect: ParsedProxyHost{
			Host:                     "example.org",
			UsingDefaultWebProxyPort: true,
			WebProxyAddr:             "example.org:3080",
			SSHProxyAddr:             "example.org:200",
		},
	}, {
		name:      "SSH port empty",
		input:     "example.org:100,",
		expectErr: false,
		expect: ParsedProxyHost{
			Host:                     "example.org",
			UsingDefaultWebProxyPort: false,
			WebProxyAddr:             "example.org:100",
			SSHProxyAddr:             "example.org:3023",
		},
	}, {
		name:      "SSH port with whitespace",
		input:     "example.org:100, 200 ",
		expectErr: false,
		expect: ParsedProxyHost{
			Host:                     "example.org",
			UsingDefaultWebProxyPort: false,
			WebProxyAddr:             "example.org:100",
			SSHProxyAddr:             "example.org:200",
		},
	}, {
		name:      "SSH port empty with whitespace",
		input:     "example.org:100,  ",
		expectErr: false,
		expect: ParsedProxyHost{
			Host:                     "example.org",
			UsingDefaultWebProxyPort: false,
			WebProxyAddr:             "example.org:100",
			SSHProxyAddr:             "example.org:3023",
		},
	}, {
		name:      "Both ports specified",
		input:     "example.org:100,200",
		expectErr: false,
		expect: ParsedProxyHost{
			Host:                     "example.org",
			UsingDefaultWebProxyPort: false,
			WebProxyAddr:             "example.org:100",
			SSHProxyAddr:             "example.org:200",
		},
	}, {
		name:      "Both ports empty with whitespace",
		input:     "example.org: , ",
		expectErr: false,
		expect: ParsedProxyHost{
			Host:                     "example.org",
			UsingDefaultWebProxyPort: true,
			WebProxyAddr:             "example.org:3080",
			SSHProxyAddr:             "example.org:3023",
		},
	}, {
		name:      "Too many parts",
		input:     "example.org:100,200,300,400",
		expectErr: true,
		expect:    ParsedProxyHost{},
	},
}

func TestParseProxyHostString(t *testing.T) {
	t.Parallel()

	for _, testCase := range parseProxyHostTestCases {
		t.Run(testCase.name, func(t *testing.T) {
			expected := testCase.expect
			actual, err := ParseProxyHost(testCase.input)

			if testCase.expectErr {
				require.Error(t, err)
				require.Nil(t, actual)
				return
			}

			require.NoError(t, err)
			require.Equal(t, expected.Host, actual.Host)
			require.Equal(t, expected.UsingDefaultWebProxyPort, actual.UsingDefaultWebProxyPort)
			require.Equal(t, expected.WebProxyAddr, actual.WebProxyAddr)
			require.Equal(t, expected.SSHProxyAddr, actual.SSHProxyAddr)
		})
	}
}

func TestNew(t *testing.T) {
	conf := Config{
		Host:      "localhost",
		HostLogin: "vincent",
		HostPort:  22,
		KeysDir:   t.TempDir(),
		Username:  "localuser",
		SiteName:  "site",
		Tracer:    tracing.NoopProvider().Tracer("test"),
	}
	err := conf.ParseProxyHost("proxy")
	require.NoError(t, err)

	tc, err := NewClient(&conf)
	require.NoError(t, err)
	require.NotNil(t, tc)

	la := tc.LocalAgent()
	require.NotNil(t, la)
}

func TestParseLabels(t *testing.T) {
	// simplest case:
	m, err := ParseLabelSpec("key=value")
	require.NotNil(t, m)
	require.NoError(t, err)
	require.Empty(t, cmp.Diff(m, map[string]string{
		"key": "value",
	}))

	// multiple values:
	m, err = ParseLabelSpec(`type="database";" role"=master,ver="mongoDB v1,2"`)
	require.NotNil(t, m)
	require.NoError(t, err)
	require.Len(t, m, 3)
	require.Equal(t, "master", m["role"])
	require.Equal(t, "database", m["type"])
	require.Equal(t, "mongoDB v1,2", m["ver"])

	// multiple and unicode:
	m, err = ParseLabelSpec(`服务器环境=测试,操作系统类别=Linux,机房=华北`)
	require.NoError(t, err)
	require.NotNil(t, m)
	require.Len(t, m, 3)
	require.Equal(t, "测试", m["服务器环境"])
	require.Equal(t, "Linux", m["操作系统类别"])
	require.Equal(t, "华北", m["机房"])

	// invalid specs
	m, err = ParseLabelSpec(`type="database,"role"=master,ver="mongoDB v1,2"`)
	require.Nil(t, m)
	require.Error(t, err)
	m, err = ParseLabelSpec(`type="database",role,master`)
	require.Nil(t, m)
	require.Error(t, err)
}

func TestPortsParsing(t *testing.T) {
	// empty:
	ports, err := ParsePortForwardSpec(nil)
	require.Nil(t, ports)
	require.NoError(t, err)
	ports, err = ParsePortForwardSpec([]string{})
	require.Nil(t, ports)
	require.NoError(t, err)
	// not empty (but valid)
	spec := []string{
		"80:remote.host:180",
		"10.0.10.1:443:deep.host:1443",
	}
	ports, err = ParsePortForwardSpec(spec)
	require.NoError(t, err)
	require.Len(t, ports, 2)
	require.Empty(t, cmp.Diff(ports, ForwardedPorts{
		{
			SrcIP:    "127.0.0.1",
			SrcPort:  80,
			DestHost: "remote.host",
			DestPort: 180,
		},
		{
			SrcIP:    "10.0.10.1",
			SrcPort:  443,
			DestHost: "deep.host",
			DestPort: 1443,
		},
	}))

	// back to strings:
	clone := ports.String()
	require.Equal(t, spec[0], clone[0])
	require.Equal(t, spec[1], clone[1])

	// parse invalid spec:
	spec = []string{"foo", "bar"}
	ports, err = ParsePortForwardSpec(spec)
	require.Empty(t, ports)
	require.True(t, trace.IsBadParameter(err), "expected bad parameter, got %v", err)
}

var dynamicPortForwardParsingTestCases = []struct {
	spec    []string
	isError bool
	output  DynamicForwardedPorts
}{
	{
		spec:    nil,
		isError: false,
		output:  DynamicForwardedPorts{},
	},
	{
		spec:    []string{},
		isError: false,
		output:  DynamicForwardedPorts{},
	},
	{
		spec:    []string{"localhost"},
		isError: true,
		output:  DynamicForwardedPorts{},
	},
	{
		spec:    []string{"localhost:123:456"},
		isError: true,
		output:  DynamicForwardedPorts{},
	},
	{
		spec:    []string{"8080"},
		isError: false,
		output: DynamicForwardedPorts{
			DynamicForwardedPort{
				SrcIP:   "127.0.0.1",
				SrcPort: 8080,
			},
		},
	},
	{
		spec:    []string{":8080"},
		isError: false,
		output: DynamicForwardedPorts{
			DynamicForwardedPort{
				SrcIP:   "127.0.0.1",
				SrcPort: 8080,
			},
		},
	},
	{
		spec:    []string{":8080:8081"},
		isError: true,
		output:  DynamicForwardedPorts{},
	},
	{
		spec:    []string{"[::1]:8080"},
		isError: false,
		output: DynamicForwardedPorts{
			DynamicForwardedPort{
				SrcIP:   "::1",
				SrcPort: 8080,
			},
		},
	},
	{
		spec:    []string{"10.0.0.1:8080"},
		isError: false,
		output: DynamicForwardedPorts{
			DynamicForwardedPort{
				SrcIP:   "10.0.0.1",
				SrcPort: 8080,
			},
		},
	},
	{
		spec:    []string{":8080", "10.0.0.1:8080"},
		isError: false,
		output: DynamicForwardedPorts{
			DynamicForwardedPort{
				SrcIP:   "127.0.0.1",
				SrcPort: 8080,
			},
			DynamicForwardedPort{
				SrcIP:   "10.0.0.1",
				SrcPort: 8080,
			},
		},
	},
}

func TestDynamicPortsParsing(t *testing.T) {
	for _, tt := range dynamicPortForwardParsingTestCases {
		specs, err := ParseDynamicPortForwardSpec(tt.spec)
		if tt.isError {
			require.Error(t, err)
			continue
		} else {
			require.NoError(t, err)
		}

		require.Empty(t, cmp.Diff(specs, tt.output))
	}
}

func TestWebProxyHostPort(t *testing.T) {
	t.Parallel()

	tests := []struct {
		desc         string
		webProxyAddr string
		wantHost     string
		wantPort     int
	}{
		{
			desc:         "valid WebProxyAddr",
			webProxyAddr: "example.com:12345",
			wantHost:     "example.com",
			wantPort:     12345,
		},
		{
			desc:         "WebProxyAddr without port",
			webProxyAddr: "example.com",
			wantHost:     "example.com",
			wantPort:     defaults.HTTPListenPort,
		},
		{
			desc:         "invalid WebProxyAddr",
			webProxyAddr: "not a valid addr",
			wantHost:     "unknown",
			wantPort:     defaults.HTTPListenPort,
		},
		{
			desc:         "empty WebProxyAddr",
			webProxyAddr: "",
			wantHost:     "unknown",
			wantPort:     defaults.HTTPListenPort,
		},
	}
	for _, tt := range tests {
		t.Run(tt.desc, func(t *testing.T) {
			c := &Config{WebProxyAddr: tt.webProxyAddr}
			gotHost, gotPort := c.WebProxyHostPort()
			require.Equal(t, tt.wantHost, gotHost)
			require.Equal(t, tt.wantPort, gotPort)
		})
	}
}

func TestGetKubeTLSServerName(t *testing.T) {
	tests := []struct {
		name          string
		kubeProxyAddr string
		want          string
	}{
		{
			name:          "ipv4 format, API domain should be used",
			kubeProxyAddr: "127.0.0.1",
			want:          "kube-teleport-proxy-alpn.teleport.cluster.local",
		},
		{
			name:          "empty host, API domain should be used",
			kubeProxyAddr: "",
			want:          "kube-teleport-proxy-alpn.teleport.cluster.local",
		},
		{
			name:          "ipv4 unspecified, API domain should be used ",
			kubeProxyAddr: "0.0.0.0",
			want:          "kube-teleport-proxy-alpn.teleport.cluster.local",
		},
		{
			name:          "valid hostname",
			kubeProxyAddr: "example.com",
			want:          "kube-teleport-proxy-alpn.example.com",
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			got := GetKubeTLSServerName(tt.kubeProxyAddr)
			require.Equal(t, tt.want, got)
		})
	}
}

// TestApplyProxySettings validates that settings received from the proxy's
// ping endpoint are correctly applied to Teleport client.
func TestApplyProxySettings(t *testing.T) {
	tests := []struct {
		desc        string
		settingsIn  webclient.ProxySettings
		tcConfigIn  Config
		tcConfigOut Config
	}{
		{
			desc:       "Postgres public address unspecified, defaults to web proxy address",
			settingsIn: webclient.ProxySettings{},
			tcConfigIn: Config{
				WebProxyAddr: "web.example.com:443",
			},
			tcConfigOut: Config{
				WebProxyAddr:      "web.example.com:443",
				PostgresProxyAddr: "web.example.com:443",
			},
		},
		{
			desc: "MySQL enabled without public address, defaults to web proxy host and MySQL default port",
			settingsIn: webclient.ProxySettings{
				DB: webclient.DBProxySettings{
					MySQLListenAddr: "0.0.0.0:3036",
				},
			},
			tcConfigIn: Config{
				WebProxyAddr: "web.example.com:443",
			},
			tcConfigOut: Config{
				WebProxyAddr:      "web.example.com:443",
				PostgresProxyAddr: "web.example.com:443",
				MySQLProxyAddr:    "web.example.com:3036",
			},
		},
		{
			desc: "both Postgres and MySQL custom public addresses are specified",
			settingsIn: webclient.ProxySettings{
				DB: webclient.DBProxySettings{
					PostgresPublicAddr: "postgres.example.com:5432",
					MySQLListenAddr:    "0.0.0.0:3036",
					MySQLPublicAddr:    "mysql.example.com:3306",
				},
			},
			tcConfigIn: Config{
				WebProxyAddr: "web.example.com:443",
			},
			tcConfigOut: Config{
				WebProxyAddr:      "web.example.com:443",
				PostgresProxyAddr: "postgres.example.com:5432",
				MySQLProxyAddr:    "mysql.example.com:3306",
			},
		},
		{
			desc: "Postgres public address port unspecified, defaults to web proxy address port",
			settingsIn: webclient.ProxySettings{
				DB: webclient.DBProxySettings{
					PostgresPublicAddr: "postgres.example.com",
				},
			},
			tcConfigIn: Config{
				WebProxyAddr: "web.example.com:443",
			},
			tcConfigOut: Config{
				WebProxyAddr:      "web.example.com:443",
				PostgresProxyAddr: "postgres.example.com:443",
			},
		},
	}
	for _, test := range tests {
		t.Run(test.desc, func(t *testing.T) {
			tc := &TeleportClient{Config: test.tcConfigIn}
			err := tc.applyProxySettings(test.settingsIn)
			require.NoError(t, err)
			require.EqualValues(t, test.tcConfigOut, tc.Config)
		})
	}
}

func TestApplyAuthSettings(t *testing.T) {
	tests := []struct {
		desc        string
		settingsIn  webclient.AuthenticationSettings
		tcConfigIn  Config
		tcConfigOut Config
	}{
		{
			desc: "PIV slot set by server",
			settingsIn: webclient.AuthenticationSettings{
				PIVSlot: "9c",
			},
			tcConfigOut: Config{
				PIVSlot: "9c",
			},
		}, {
			desc: "PIV slot set by client",
			tcConfigIn: Config{
				PIVSlot: "9a",
			},
			tcConfigOut: Config{
				PIVSlot: "9a",
			},
		}, {
			desc: "PIV slot set on server and client, client takes precedence",
			settingsIn: webclient.AuthenticationSettings{
				PIVSlot: "9c",
			},
			tcConfigIn: Config{
				PIVSlot: "9a",
			},
			tcConfigOut: Config{
				PIVSlot: "9a",
			},
		},
	}
	for _, test := range tests {
		t.Run(test.desc, func(t *testing.T) {
			tc := &TeleportClient{Config: test.tcConfigIn}
			tc.applyAuthSettings(test.settingsIn)
			require.EqualValues(t, test.tcConfigOut, tc.Config)
		})
	}
}

type mockAgent struct {
	// Agent is embedded to avoid redeclaring all interface methods.
	// Only the Signers method is implemented by testAgent.
	agent.ExtendedAgent
	ValidPrincipals []string
}

type mockSigner struct {
	ValidPrincipals []string
}

func (s *mockSigner) PublicKey() ssh.PublicKey {
	return &ssh.Certificate{
		ValidPrincipals: s.ValidPrincipals,
	}
}

func (s *mockSigner) Sign(rand io.Reader, b []byte) (*ssh.Signature, error) {
	return nil, fmt.Errorf("mockSigner does not implement Sign")
}

// Signers implements agent.Agent.Signers.
func (m *mockAgent) Signers() ([]ssh.Signer, error) {
	return []ssh.Signer{&mockSigner{ValidPrincipals: m.ValidPrincipals}}, nil
}

func TestNewClient_getProxySSHPrincipal(t *testing.T) {
	for _, tc := range []struct {
		name            string
		cfg             *Config
		expectPrincipal string
	}{
		{
			name: "ProxySSHPrincipal override",
			cfg: &Config{
				Username:          "teleport_user",
				HostLogin:         "host_login",
				WebProxyAddr:      "localhost",
				ProxySSHPrincipal: "proxy_ssh_principal_override",
				Agent:             &mockAgent{ValidPrincipals: []string{"key_principal"}},
				AuthMethods:       []ssh.AuthMethod{ssh.Password("xyz") /* placeholder authmethod */},
				Tracer:            tracing.NoopProvider().Tracer("test"),
			},
			expectPrincipal: "proxy_ssh_principal_override",
		}, {
			name: "Key principal",
			cfg: &Config{
				Username:     "teleport_user",
				HostLogin:    "host_login",
				WebProxyAddr: "localhost",
				Agent:        &mockAgent{ValidPrincipals: []string{"key_principal"}},
				AuthMethods:  []ssh.AuthMethod{ssh.Password("xyz") /* placeholder authmethod */},
				Tracer:       tracing.NoopProvider().Tracer("test"),
			},
			expectPrincipal: "key_principal",
		}, {
			name: "Host login default",
			cfg: &Config{
				Username:     "teleport_user",
				HostLogin:    "host_login",
				WebProxyAddr: "localhost",
				Agent:        &mockAgent{ /* no agent key principals */ },
				AuthMethods:  []ssh.AuthMethod{ssh.Password("xyz") /* placeholder authmethod */},
				Tracer:       tracing.NoopProvider().Tracer("test"),
			},
			expectPrincipal: "host_login",
		}, {
			name: "Jump host",
			cfg: &Config{
				Username:     "teleport_user",
				HostLogin:    "host_login",
				WebProxyAddr: "localhost",
				JumpHosts: []utils.JumpHost{
					{
						Username: "jumphost_user",
					},
				},
				Agent:       &mockAgent{ /* no agent key principals */ },
				AuthMethods: []ssh.AuthMethod{ssh.Password("xyz") /* placeholder authmethod */},
				Tracer:      tracing.NoopProvider().Tracer("test"),
			},
			expectPrincipal: "jumphost_user",
		},
	} {
		t.Run(tc.name, func(t *testing.T) {
			client, err := NewClient(tc.cfg)
			require.NoError(t, err)
			require.Equal(t, tc.expectPrincipal, client.getProxySSHPrincipal(), "ProxySSHPrincipal mismatch")
		})
	}
}

var parseSearchKeywordsTestCases = []struct {
	name     string
	spec     string
	expected []string
}{
	{
		name: "empty input",
		spec: "",
	},
	{
		name:     "simple input",
		spec:     "foo",
		expected: []string{"foo"},
	},
	{
		name:     "complex input",
		spec:     `"foo,bar","some phrase's",baz=qux's ,"some other  phrase"," another one  "`,
		expected: []string{"foo,bar", "some phrase's", "baz=qux's", "some other  phrase", "another one"},
	},
	{
		name:     "unicode input",
		spec:     `"服务器环境=测试,操作系统类别", Linux , 机房=华北 `,
		expected: []string{"服务器环境=测试,操作系统类别", "Linux", "机房=华北"},
	},
}

func TestParseSearchKeywords(t *testing.T) {
	t.Parallel()

	for _, tc := range parseSearchKeywordsTestCases {
		t.Run(tc.name, func(t *testing.T) {
			m := ParseSearchKeywords(tc.spec, ',')
			require.Equal(t, tc.expected, m)
		})
	}

	// Test default delimiter (which is a comma)
	m := ParseSearchKeywords("foo,bar", rune(0))
	require.Equal(t, []string{"foo", "bar"}, m)
}

func TestParseSearchKeywords_SpaceDelimiter(t *testing.T) {
	t.Parallel()

	testCases := []struct {
		name     string
		spec     string
		expected []string
	}{
		{
			name:     "simple input",
			spec:     "foo",
			expected: []string{"foo"},
		},
		{
			name:     "complex input",
			spec:     `foo,bar "some phrase's" baz=qux's "some other  phrase" " another one  "`,
			expected: []string{"foo,bar", "some phrase's", "baz=qux's", "some other  phrase", "another one"},
		},
		{
			name:     "unicode input",
			spec:     `服务器环境=测试,操作系统类别 Linux  机房=华北 `,
			expected: []string{"服务器环境=测试,操作系统类别", "Linux", "机房=华北"},
		},
	}

	for _, tc := range testCases {
		t.Run(tc.name, func(t *testing.T) {
			m := ParseSearchKeywords(tc.spec, ' ')
			require.Equal(t, tc.expected, m)
		})
	}
}

func TestVirtualPathNames(t *testing.T) {
	t.Parallel()

	testCases := []struct {
		name     string
		kind     VirtualPathKind
		params   VirtualPathParams
		expected []string
	}{
		{
			name:   "dummy",
			kind:   VirtualPathKind("foo"),
			params: VirtualPathParams{"a", "b", "c"},
			expected: []string{
				"TSH_VIRTUAL_PATH_FOO_A_B_C",
				"TSH_VIRTUAL_PATH_FOO_A_B",
				"TSH_VIRTUAL_PATH_FOO_A",
				"TSH_VIRTUAL_PATH_FOO",
			},
		},
		{
			name:     "key",
			kind:     VirtualPathKey,
			params:   nil,
			expected: []string{"TSH_VIRTUAL_PATH_KEY"},
		},
		{
			name:   "database ca",
			kind:   VirtualPathCA,
			params: VirtualPathCAParams(types.DatabaseCA),
			expected: []string{
				"TSH_VIRTUAL_PATH_CA_DB",
				"TSH_VIRTUAL_PATH_CA",
			},
		},
		{
			name:   "database client ca",
			kind:   VirtualPathCA,
			params: VirtualPathCAParams(types.DatabaseClientCA),
			expected: []string{
				"TSH_VIRTUAL_PATH_CA_DB_CLIENT",
				"TSH_VIRTUAL_PATH_CA",
			},
		},
		{
			name:   "host ca",
			kind:   VirtualPathCA,
			params: VirtualPathCAParams(types.HostCA),
			expected: []string{
				"TSH_VIRTUAL_PATH_CA_HOST",
				"TSH_VIRTUAL_PATH_CA",
			},
		},
		{
			name:   "database",
			kind:   VirtualPathDatabase,
			params: VirtualPathDatabaseParams("foo"),
			expected: []string{
				"TSH_VIRTUAL_PATH_DB_FOO",
				"TSH_VIRTUAL_PATH_DB",
			},
		},
		{
			name:   "app",
			kind:   VirtualPathApp,
			params: VirtualPathAppParams("foo"),
			expected: []string{
				"TSH_VIRTUAL_PATH_APP_FOO",
				"TSH_VIRTUAL_PATH_APP",
			},
		},
		{
			name:   "kube",
			kind:   VirtualPathKubernetes,
			params: VirtualPathKubernetesParams("foo"),
			expected: []string{
				"TSH_VIRTUAL_PATH_KUBE_FOO",
				"TSH_VIRTUAL_PATH_KUBE",
			},
		},
	}

	for _, tc := range testCases {
		t.Run(tc.name, func(t *testing.T) {
			names := VirtualPathEnvNames(tc.kind, tc.params)
			require.Equal(t, tc.expected, names)
		})
	}
}

func TestFormatConnectToProxyErr(t *testing.T) {
	tests := []struct {
		name string
		err  error

		wantError       string
		wantUserMessage string
	}{
		{
			name: "nil error passes through",
			err:  nil,
		},
		{
			name:      "unrelated error passes through",
			err:       fmt.Errorf("flux capacitor undercharged"),
			wantError: "flux capacitor undercharged",
		},
		{
			name:            "principals mismatch user message injected",
			err:             trace.Wrap(fmt.Errorf(`ssh: handshake failed: ssh: principal "" not in the set of valid principals for given certificate`)),
			wantError:       `ssh: handshake failed: ssh: principal "" not in the set of valid principals for given certificate`,
			wantUserMessage: unconfiguredPublicAddrMsg,
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			err := formatConnectToProxyErr(tt.err)
			if tt.wantError == "" {
				require.NoError(t, err)
				return
			}
			var traceErr *trace.TraceErr
			if errors.As(err, &traceErr) {
				require.EqualError(t, traceErr.OrigError(), tt.wantError)
			} else {
				require.EqualError(t, err, tt.wantError)
			}

			if tt.wantUserMessage != "" {
				require.NotNil(t, traceErr)
				require.Contains(t, traceErr.Messages, tt.wantUserMessage)
			}
		})
	}
}

func TestGetDesktopEventWebURL(t *testing.T) {
	initDate := time.Date(2021, 1, 1, 12, 0, 0, 0, time.UTC)

	tt := []struct {
		name      string
		proxyHost string
		cluster   string
		sid       session.ID
		events    []events.EventFields
		expected  string
	}{
		{
			name:     "nil events",
			events:   nil,
			expected: "",
		},
		{
			name:     "empty events",
			events:   make([]events.EventFields, 0),
			expected: "",
		},
		{
			name:      "two events, 1000 ms duration",
			proxyHost: "host",
			cluster:   "cluster",
			sid:       "session_id",
			events: []events.EventFields{
				{
					"time": initDate,
				},
				{
					"time": initDate.Add(1000 * time.Millisecond),
				},
			},
			expected: "https://host/web/cluster/cluster/session/session_id?recordingType=desktop&durationMs=1000",
		},
		{
			name:      "multiple events",
			proxyHost: "host",
			cluster:   "cluster",
			sid:       "session_id",
			events: []events.EventFields{
				{
					"time": initDate,
				},
				{
					"time": initDate.Add(10 * time.Millisecond),
				},
				{
					"time": initDate.Add(20 * time.Millisecond),
				},
				{
					"time": initDate.Add(30 * time.Millisecond),
				},
				{
					"time": initDate.Add(40 * time.Millisecond),
				},
				{
					"time": initDate.Add(50 * time.Millisecond),
				},
			},
			expected: "https://host/web/cluster/cluster/session/session_id?recordingType=desktop&durationMs=50",
		},
	}

	for _, tc := range tt {
		t.Run(tc.name, func(t *testing.T) {
			require.Equal(t, tc.expected, getDesktopEventWebURL(tc.proxyHost, tc.cluster, &tc.sid, tc.events))
		})
	}
}

type mockRoleGetter func(ctx context.Context) ([]types.Role, error)

func (m mockRoleGetter) GetRoles(ctx context.Context) ([]types.Role, error) {
	return m(ctx)
}

func TestCommandLimit(t *testing.T) {
	t.Parallel()
	cases := []struct {
		name        string
		mfaRequired bool
		getter      roleGetter
		expected    int
	}{
		{
			name:        "mfa required",
			mfaRequired: true,
			expected:    1,
			getter: mockRoleGetter(func(ctx context.Context) ([]types.Role, error) {
				role, err := types.NewRole("test", types.RoleSpecV6{
					Options: types.RoleOptions{MaxConnections: 500},
				})
				require.NoError(t, err)

				return []types.Role{role}, nil
			}),
		},
		{
			name:     "failure getting roles",
			expected: 1,
			getter: mockRoleGetter(func(ctx context.Context) ([]types.Role, error) {
				return nil, errors.New("fail")
			}),
		},
		{
			name:     "no roles",
			expected: -1,
			getter: mockRoleGetter(func(ctx context.Context) ([]types.Role, error) {
				return nil, nil
			}),
		},
		{
			name:     "max_connections=1",
			expected: 1,
			getter: mockRoleGetter(func(ctx context.Context) ([]types.Role, error) {
				role, err := types.NewRole("test", types.RoleSpecV6{
					Options: types.RoleOptions{MaxConnections: 1},
				})
				require.NoError(t, err)

				return []types.Role{role}, nil
			}),
		},
		{
			name:     "max_connections=2",
			expected: 1,
			getter: mockRoleGetter(func(ctx context.Context) ([]types.Role, error) {
				role, err := types.NewRole("test", types.RoleSpecV6{
					Options: types.RoleOptions{MaxConnections: 2},
				})
				require.NoError(t, err)

				return []types.Role{role}, nil
			}),
		},
		{
			name:     "max_connections=500",
			expected: 250,
			getter: mockRoleGetter(func(ctx context.Context) ([]types.Role, error) {
				role, err := types.NewRole("test", types.RoleSpecV6{
					Options: types.RoleOptions{MaxConnections: 500},
				})
				require.NoError(t, err)

				return []types.Role{role}, nil
			}),
		},
		{
			name:     "max_connections=max",
			expected: math.MaxInt64 / 2,
			getter: mockRoleGetter(func(ctx context.Context) ([]types.Role, error) {
				role, err := types.NewRole("test", types.RoleSpecV6{
					Options: types.RoleOptions{MaxConnections: math.MaxInt64},
				})
				require.NoError(t, err)

				return []types.Role{role}, nil
			}),
		},
	}

	for _, tt := range cases {
		tt := tt
		t.Run(tt.name, func(t *testing.T) {
			t.Parallel()
			require.Equal(t, tt.expected, commandLimit(context.Background(), tt.getter, tt.mfaRequired))
		})
	}
}

func TestRootClusterName(t *testing.T) {
	ctx := context.Background()
	ca := newTestAuthority(t)

	rootCluster := ca.trustedCerts.ClusterName
	leafCluster := "leaf-cluster"
	key := ca.makeSignedKey(t, KeyIndex{
		ProxyHost:   "proxy.example.com",
		ClusterName: leafCluster,
		Username:    "teleport-user",
	}, false)

	for _, tc := range []struct {
		name      string
		modifyCfg func(t *Config)
	}{
		{
			name: "static TLS",
			modifyCfg: func(c *Config) {
				tlsConfig, err := key.TeleportClientTLSConfig(nil, []string{leafCluster, rootCluster})
				require.NoError(t, err)
				c.TLS = tlsConfig
			},
		}, {
			name: "key store",
			modifyCfg: func(c *Config) {
				c.ClientStore = NewMemClientStore()
				err := c.ClientStore.AddKey(key)
				require.NoError(t, err)
			},
		},
	} {
		t.Run(tc.name, func(t *testing.T) {
			cfg := &Config{
				WebProxyAddr: "proxy.example.com",
				Username:     "teleport-user",
				SiteName:     leafCluster,
			}
			tc.modifyCfg(cfg)

			tc, err := NewClient(cfg)
			require.NoError(t, err)

			clusterName, err := tc.RootClusterName(ctx)
			require.NoError(t, err)
			require.Equal(t, rootCluster, clusterName)
		})
	}
}

func TestLoadTLSConfigForClusters(t *testing.T) {
	rootCA := newTestAuthority(t)

	rootCluster := rootCA.trustedCerts.ClusterName
	key := rootCA.makeSignedKey(t, KeyIndex{
		ProxyHost:   "proxy.example.com",
		ClusterName: rootCluster,
		Username:    "teleport-user",
	}, false)

	tlsCertPoolNoCA, err := key.clientCertPool()
	require.NoError(t, err)
	tlsCertPoolRootCA, err := key.clientCertPool(rootCluster)
	require.NoError(t, err)

	tlsConfig, err := key.TeleportClientTLSConfig(nil, []string{rootCluster})
	require.NoError(t, err)

	for _, tt := range []struct {
		name      string
		clusters  []string
		modifyCfg func(t *Config)
		expectCAs *x509.CertPool
	}{
		{
			name:     "static TLS",
			clusters: []string{rootCluster},
			modifyCfg: func(c *Config) {
				c.TLS = tlsConfig.Clone()
			},
			expectCAs: tlsCertPoolRootCA,
		}, {
			name:     "key store no clusters",
			clusters: []string{},
			modifyCfg: func(c *Config) {
				c.ClientStore = NewMemClientStore()
				err := c.ClientStore.AddKey(key)
				require.NoError(t, err)
			},
			expectCAs: tlsCertPoolNoCA,
		}, {
			name:     "key store root cluster",
			clusters: []string{rootCluster},
			modifyCfg: func(c *Config) {
				c.ClientStore = NewMemClientStore()
				err := c.ClientStore.AddKey(key)
				require.NoError(t, err)
			},
			expectCAs: tlsCertPoolRootCA,
		}, {
			name:     "key store unknown clusters",
			clusters: []string{"leaf-1", "leaf-2"},
			modifyCfg: func(c *Config) {
				c.ClientStore = NewMemClientStore()
				err := c.ClientStore.AddKey(key)
				require.NoError(t, err)
			},
			expectCAs: tlsCertPoolNoCA,
		},
	} {
		t.Run(tt.name, func(t *testing.T) {
			cfg := &Config{
				WebProxyAddr: "proxy.example.com",
				Username:     "teleport-user",
				SiteName:     rootCluster,
			}
			tt.modifyCfg(cfg)

			tc, err := NewClient(cfg)
			require.NoError(t, err)

			tlsConfig, err := tc.LoadTLSConfigForClusters(tt.clusters)
			require.NoError(t, err)
			require.True(t, tlsConfig.RootCAs.Equal(tt.expectCAs))
		})
	}
}

func TestConnectToProxyCancelledContext(t *testing.T) {
	cfg := MakeDefaultConfig()

	cfg.Agent = &mockAgent{}
	cfg.AuthMethods = []ssh.AuthMethod{ssh.Password("xyz")}
	cfg.AddKeysToAgent = AddKeysToAgentNo
	cfg.WebProxyAddr = "dummy"
	cfg.KeysDir = t.TempDir()
	cfg.TLSRoutingEnabled = true

	clt, err := NewClient(cfg)
	require.NoError(t, err)

	ctx, cancel := context.WithCancel(context.Background())
	cancel()

	proxy, err := clt.ConnectToProxy(ctx)
	require.Nil(t, proxy)
	require.Error(t, err)
}