369 lines
8.9 KiB
Go
369 lines
8.9 KiB
Go
package dnsforward
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import (
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"crypto/tls"
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"net"
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"net/http"
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"net/url"
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"testing"
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"github.com/AdguardTeam/dnsproxy/proxy"
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"github.com/AdguardTeam/golibs/logutil/slogutil"
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"github.com/AdguardTeam/golibs/testutil"
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"github.com/quic-go/quic-go"
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"github.com/stretchr/testify/assert"
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)
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// testTLSConn is a tlsConn for tests.
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type testTLSConn struct {
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// Conn is embedded here simply to make testTLSConn a net.Conn without
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// actually implementing all methods.
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net.Conn
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serverName string
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}
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// ConnectionState implements the tlsConn interface for testTLSConn.
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func (c testTLSConn) ConnectionState() (cs tls.ConnectionState) {
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cs.ServerName = c.serverName
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return cs
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}
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// testQUICConnection is a quicConnection for tests.
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type testQUICConnection struct {
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// Connection is embedded here simply to make testQUICConnection a
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// quic.Connection without actually implementing all methods.
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quic.Connection
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serverName string
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}
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// ConnectionState implements the quicConnection interface for
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// testQUICConnection.
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func (c testQUICConnection) ConnectionState() (cs quic.ConnectionState) {
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cs.TLS.ServerName = c.serverName
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return cs
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}
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func TestServer_clientIDFromDNSContext(t *testing.T) {
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testCases := []struct {
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name string
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proto proxy.Proto
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confSrvName string
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cliSrvName string
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wantClientID string
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wantErrMsg string
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inclHTTPTLS bool
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strictSNI bool
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}{{
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name: "udp",
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proto: proxy.ProtoUDP,
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confSrvName: "",
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cliSrvName: "",
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wantClientID: "",
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wantErrMsg: "",
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inclHTTPTLS: false,
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strictSNI: false,
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}, {
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name: "tls_no_clientid",
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proto: proxy.ProtoTLS,
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confSrvName: "example.com",
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cliSrvName: "example.com",
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wantClientID: "",
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wantErrMsg: "",
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inclHTTPTLS: false,
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strictSNI: true,
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}, {
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name: "tls_no_client_server_name",
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proto: proxy.ProtoTLS,
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confSrvName: "example.com",
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cliSrvName: "",
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wantClientID: "",
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wantErrMsg: `clientid check: client server name "" ` +
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`doesn't match host server name "example.com"`,
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inclHTTPTLS: false,
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strictSNI: true,
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}, {
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name: "tls_no_client_server_name_no_strict",
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proto: proxy.ProtoTLS,
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confSrvName: "example.com",
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cliSrvName: "",
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wantClientID: "",
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wantErrMsg: "",
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inclHTTPTLS: false,
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strictSNI: false,
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}, {
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name: "tls_clientid",
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proto: proxy.ProtoTLS,
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confSrvName: "example.com",
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cliSrvName: "cli.example.com",
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wantClientID: "cli",
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wantErrMsg: "",
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inclHTTPTLS: false,
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strictSNI: true,
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}, {
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name: "tls_clientid_hostname_error",
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proto: proxy.ProtoTLS,
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confSrvName: "example.com",
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cliSrvName: "cli.example.net",
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wantClientID: "",
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wantErrMsg: `clientid check: client server name "cli.example.net" ` +
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`doesn't match host server name "example.com"`,
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inclHTTPTLS: false,
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strictSNI: true,
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}, {
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name: "tls_invalid_clientid",
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proto: proxy.ProtoTLS,
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confSrvName: "example.com",
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cliSrvName: "!!!.example.com",
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wantClientID: "",
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wantErrMsg: `clientid check: invalid clientid "!!!": ` +
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`bad hostname label rune '!'`,
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inclHTTPTLS: false,
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strictSNI: true,
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}, {
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name: "tls_clientid_too_long",
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proto: proxy.ProtoTLS,
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confSrvName: "example.com",
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cliSrvName: `abcdefghijklmnopqrstuvwxyz0123456789abcdefghijklmno` +
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`pqrstuvwxyz0123456789.example.com`,
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wantClientID: "",
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wantErrMsg: `clientid check: invalid clientid "abcdefghijklmno` +
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`pqrstuvwxyz0123456789abcdefghijklmnopqrstuvwxyz0123456789": ` +
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`hostname label is too long: got 72, max 63`,
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inclHTTPTLS: false,
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strictSNI: true,
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}, {
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name: "quic_clientid",
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proto: proxy.ProtoQUIC,
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confSrvName: "example.com",
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cliSrvName: "cli.example.com",
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wantClientID: "cli",
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wantErrMsg: "",
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inclHTTPTLS: false,
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strictSNI: true,
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}, {
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name: "tls_clientid_issue3437",
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proto: proxy.ProtoTLS,
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confSrvName: "example.com",
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cliSrvName: "cli.myexample.com",
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wantClientID: "",
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wantErrMsg: `clientid check: client server name "cli.myexample.com" ` +
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`doesn't match host server name "example.com"`,
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inclHTTPTLS: false,
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strictSNI: true,
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}, {
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name: "tls_case",
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proto: proxy.ProtoTLS,
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confSrvName: "example.com",
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cliSrvName: "InSeNsItIvE.example.com",
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wantClientID: "insensitive",
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wantErrMsg: ``,
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inclHTTPTLS: false,
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strictSNI: true,
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}, {
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name: "quic_case",
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proto: proxy.ProtoQUIC,
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confSrvName: "example.com",
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cliSrvName: "InSeNsItIvE.example.com",
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wantClientID: "insensitive",
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wantErrMsg: ``,
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inclHTTPTLS: false,
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strictSNI: true,
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}, {
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name: "https_no_clientid",
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proto: proxy.ProtoHTTPS,
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confSrvName: "example.com",
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cliSrvName: "example.com",
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wantClientID: "",
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wantErrMsg: "",
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inclHTTPTLS: true,
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strictSNI: true,
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}, {
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name: "https_clientid",
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proto: proxy.ProtoHTTPS,
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confSrvName: "example.com",
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cliSrvName: "cli.example.com",
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wantClientID: "cli",
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wantErrMsg: "",
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inclHTTPTLS: true,
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strictSNI: true,
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}, {
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name: "https_issue5518",
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proto: proxy.ProtoHTTPS,
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confSrvName: "example.com",
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cliSrvName: "cli.example.com",
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wantClientID: "cli",
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wantErrMsg: "",
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inclHTTPTLS: false,
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strictSNI: true,
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}, {
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name: "https_no_host",
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proto: proxy.ProtoHTTPS,
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confSrvName: "example.com",
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cliSrvName: "example.com",
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wantClientID: "",
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wantErrMsg: "",
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inclHTTPTLS: false,
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strictSNI: true,
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}}
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for _, tc := range testCases {
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t.Run(tc.name, func(t *testing.T) {
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tlsConf := TLSConfig{
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ServerName: tc.confSrvName,
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StrictSNICheck: tc.strictSNI,
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}
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srv := &Server{
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conf: ServerConfig{TLSConfig: tlsConf},
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baseLogger: slogutil.NewDiscardLogger(),
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}
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var (
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conn net.Conn
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qconn quic.Connection
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httpReq *http.Request
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)
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switch tc.proto {
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case proxy.ProtoHTTPS:
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httpReq = newHTTPReq(tc.cliSrvName, tc.inclHTTPTLS)
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case proxy.ProtoQUIC:
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qconn = testQUICConnection{
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serverName: tc.cliSrvName,
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}
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case proxy.ProtoTLS:
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conn = testTLSConn{
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serverName: tc.cliSrvName,
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}
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}
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pctx := &proxy.DNSContext{
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Proto: tc.proto,
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Conn: conn,
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HTTPRequest: httpReq,
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QUICConnection: qconn,
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}
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clientID, err := srv.clientIDFromDNSContext(pctx)
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assert.Equal(t, tc.wantClientID, clientID)
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testutil.AssertErrorMsg(t, tc.wantErrMsg, err)
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})
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}
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}
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// newHTTPReq is a helper to create HTTP requests for tests.
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func newHTTPReq(cliSrvName string, inclTLS bool) (r *http.Request) {
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u := &url.URL{
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Path: "/dns-query",
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}
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r = &http.Request{
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ProtoMajor: 1,
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ProtoMinor: 1,
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URL: u,
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Host: cliSrvName,
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}
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if inclTLS {
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r.TLS = &tls.ConnectionState{
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ServerName: cliSrvName,
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}
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}
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return r
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}
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func TestClientIDFromDNSContextHTTPS(t *testing.T) {
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testCases := []struct {
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name string
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path string
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cliSrvName string
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wantClientID string
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wantErrMsg string
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}{{
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name: "no_clientid",
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path: "/dns-query",
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cliSrvName: "example.com",
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wantClientID: "",
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wantErrMsg: "",
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}, {
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name: "no_clientid_slash",
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path: "/dns-query/",
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cliSrvName: "example.com",
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wantClientID: "",
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wantErrMsg: "",
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}, {
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name: "clientid",
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path: "/dns-query/cli",
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cliSrvName: "example.com",
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wantClientID: "cli",
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wantErrMsg: "",
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}, {
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name: "clientid_slash",
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path: "/dns-query/cli/",
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cliSrvName: "example.com",
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wantClientID: "cli",
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wantErrMsg: "",
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}, {
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name: "clientid_case",
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path: "/dns-query/InSeNsItIvE",
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cliSrvName: "example.com",
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wantClientID: "insensitive",
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wantErrMsg: ``,
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}, {
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name: "bad_url",
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path: "/foo",
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cliSrvName: "example.com",
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wantClientID: "",
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wantErrMsg: `clientid check: invalid path "/foo"`,
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}, {
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name: "extra",
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path: "/dns-query/cli/foo",
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cliSrvName: "example.com",
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wantClientID: "",
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wantErrMsg: `clientid check: invalid path "/dns-query/cli/foo": extra parts`,
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}, {
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name: "invalid_clientid",
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path: "/dns-query/!!!",
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cliSrvName: "example.com",
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wantClientID: "",
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wantErrMsg: `clientid check: invalid clientid "!!!": bad hostname label rune '!'`,
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}, {
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name: "both_ids",
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path: "/dns-query/right",
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cliSrvName: "wrong.example.com",
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wantClientID: "right",
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wantErrMsg: "",
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}}
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for _, tc := range testCases {
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t.Run(tc.name, func(t *testing.T) {
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connState := &tls.ConnectionState{
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ServerName: tc.cliSrvName,
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}
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r := &http.Request{
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URL: &url.URL{
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Path: tc.path,
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},
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TLS: connState,
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}
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pctx := &proxy.DNSContext{
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Proto: proxy.ProtoHTTPS,
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HTTPRequest: r,
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}
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clientID, err := clientIDFromDNSContextHTTPS(pctx)
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assert.Equal(t, tc.wantClientID, clientID)
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testutil.AssertErrorMsg(t, tc.wantErrMsg, err)
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})
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}
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}
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