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bluepython508
2026-02-19 10:07:43 +00:00
parent 007438e372
commit 6e637ecf77
1763 changed files with 60820 additions and 279516 deletions
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147
vendor/tailscale.com/net/tlsdial/tlsdial.go generated vendored
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@@ -21,11 +21,14 @@ import (
"net"
"net/http"
"os"
"strings"
"sync"
"sync/atomic"
"time"
"tailscale.com/derp/derpconst"
"tailscale.com/envknob"
"tailscale.com/feature/buildfeatures"
"tailscale.com/health"
"tailscale.com/hostinfo"
"tailscale.com/net/bakedroots"
@@ -34,12 +37,6 @@ import (
var counterFallbackOK int32 // atomic
// If SSLKEYLOGFILE is set, it's a file to which we write our TLS private keys
// in a way that WireShark can read.
//
// See https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/Key_Log_Format
var sslKeyLogFile = os.Getenv("SSLKEYLOGFILE")
var debug = envknob.RegisterBool("TS_DEBUG_TLS_DIAL")
// tlsdialWarningPrinted tracks whether we've printed a warning about a given
@@ -57,26 +54,40 @@ var mitmBlockWarnable = health.Register(&health.Warnable{
ImpactsConnectivity: true,
})
// Config returns a tls.Config for connecting to a server.
// Config returns a tls.Config for connecting to a server that
// uses system roots for validation but, if those fail, also tries
// the baked-in LetsEncrypt roots as a fallback validation method.
//
// If base is non-nil, it's cloned as the base config before
// being configured and returned.
// If ht is non-nil, it's used to report health errors.
func Config(host string, ht *health.Tracker, base *tls.Config) *tls.Config {
func Config(ht *health.Tracker, base *tls.Config) *tls.Config {
var conf *tls.Config
if base == nil {
conf = new(tls.Config)
} else {
conf = base.Clone()
}
conf.ServerName = host
if n := sslKeyLogFile; n != "" {
f, err := os.OpenFile(n, os.O_CREATE|os.O_APPEND|os.O_WRONLY, 0600)
if err != nil {
log.Fatal(err)
// Note: we do NOT set conf.ServerName here (as we accidentally did
// previously), as this path is also used when dialing an HTTPS proxy server
// (through which we'll send a CONNECT request to get a TCP connection to do
// the real TCP connection) because host is the ultimate hostname, but this
// tls.Config is used for both the proxy and the ultimate target.
if buildfeatures.HasDebug {
// If SSLKEYLOGFILE is set, it's a file to which we write our TLS private keys
// in a way that WireShark can read.
//
// See https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/Key_Log_Format
if n := os.Getenv("SSLKEYLOGFILE"); n != "" {
f, err := os.OpenFile(n, os.O_CREATE|os.O_APPEND|os.O_WRONLY, 0600)
if err != nil {
log.Fatal(err)
}
log.Printf("WARNING: writing to SSLKEYLOGFILE %v", n)
conf.KeyLogWriter = f
}
log.Printf("WARNING: writing to SSLKEYLOGFILE %v", n)
conf.KeyLogWriter = f
}
if conf.InsecureSkipVerify {
@@ -91,7 +102,9 @@ func Config(host string, ht *health.Tracker, base *tls.Config) *tls.Config {
// (with the baked-in fallback root) in the VerifyConnection hook.
conf.InsecureSkipVerify = true
conf.VerifyConnection = func(cs tls.ConnectionState) (retErr error) {
if host == "log.tailscale.com" && hostinfo.IsNATLabGuestVM() {
dialedHost := cs.ServerName
if dialedHost == "log.tailscale.com" && hostinfo.IsNATLabGuestVM() {
// Allow log.tailscale.com TLS MITM for integration tests when
// the client's running within a NATLab VM.
return nil
@@ -114,7 +127,7 @@ func Config(host string, ht *health.Tracker, base *tls.Config) *tls.Config {
// Show a dedicated warning.
m, ok := blockblame.VerifyCertificate(cert)
if ok {
log.Printf("tlsdial: server cert for %q looks like %q equipment (could be blocking Tailscale)", host, m.Name)
log.Printf("tlsdial: server cert seen while dialing %q looks like %q equipment (could be blocking Tailscale)", dialedHost, m.Name)
ht.SetUnhealthy(mitmBlockWarnable, health.Args{"manufacturer": m.Name})
} else {
ht.SetHealthy(mitmBlockWarnable)
@@ -133,7 +146,7 @@ func Config(host string, ht *health.Tracker, base *tls.Config) *tls.Config {
ht.SetTLSConnectionError(cs.ServerName, nil)
if selfSignedIssuer != "" {
// Log the self-signed issuer, but don't treat it as an error.
log.Printf("tlsdial: warning: server cert for %q passed x509 validation but is self-signed by %q", host, selfSignedIssuer)
log.Printf("tlsdial: warning: server cert for %q passed x509 validation but is self-signed by %q", dialedHost, selfSignedIssuer)
}
}
}()
@@ -142,7 +155,7 @@ func Config(host string, ht *health.Tracker, base *tls.Config) *tls.Config {
// First try doing x509 verification with the system's
// root CA pool.
opts := x509.VerifyOptions{
DNSName: cs.ServerName,
DNSName: dialedHost,
Intermediates: x509.NewCertPool(),
}
for _, cert := range cs.PeerCertificates[1:] {
@@ -150,22 +163,22 @@ func Config(host string, ht *health.Tracker, base *tls.Config) *tls.Config {
}
_, errSys := cs.PeerCertificates[0].Verify(opts)
if debug() {
log.Printf("tlsdial(sys %q): %v", host, errSys)
log.Printf("tlsdial(sys %q): %v", dialedHost, errSys)
}
if !buildfeatures.HasBakedRoots || (errSys == nil && !debug()) {
return errSys
}
// Always verify with our baked-in Let's Encrypt certificate,
// so we can log an informational message. This is useful for
// detecting SSL MiTM.
// If we have baked-in LetsEncrypt roots and we either failed above, or
// debug logging is enabled, also verify with LetsEncrypt.
opts.Roots = bakedroots.Get()
_, bakedErr := cs.PeerCertificates[0].Verify(opts)
if debug() {
log.Printf("tlsdial(bake %q): %v", host, bakedErr)
log.Printf("tlsdial(bake %q): %v", dialedHost, bakedErr)
} else if bakedErr != nil {
if _, loaded := tlsdialWarningPrinted.LoadOrStore(host, true); !loaded {
if errSys == nil {
log.Printf("tlsdial: warning: server cert for %q is not a Let's Encrypt cert", host)
} else {
log.Printf("tlsdial: error: server cert for %q failed to verify and is not a Let's Encrypt cert", host)
if _, loaded := tlsdialWarningPrinted.LoadOrStore(dialedHost, true); !loaded {
if errSys != nil {
log.Printf("tlsdial: error: server cert for %q failed both system roots & Let's Encrypt root validation", dialedHost)
}
}
}
@@ -200,9 +213,6 @@ func SetConfigExpectedCert(c *tls.Config, certDNSName string) {
c.ServerName = certDNSName
return
}
if c.VerifyPeerCertificate != nil {
panic("refusing to override tls.Config.VerifyPeerCertificate")
}
// Set InsecureSkipVerify to prevent crypto/tls from doing its
// own cert verification, but do the same work that it'd do
// (but using certDNSName) in the VerifyPeerCertificate hook.
@@ -232,8 +242,8 @@ func SetConfigExpectedCert(c *tls.Config, certDNSName string) {
if debug() {
log.Printf("tlsdial(sys %q/%q): %v", c.ServerName, certDNSName, errSys)
}
if errSys == nil {
return nil
if !buildfeatures.HasBakedRoots || errSys == nil {
return errSys
}
opts.Roots = bakedroots.Get()
_, err := certs[0].Verify(opts)
@@ -247,41 +257,50 @@ func SetConfigExpectedCert(c *tls.Config, certDNSName string) {
}
}
// SetConfigExpectedCertHash configures c's VerifyPeerCertificate function
// to require that exactly 1 cert is presented, and that the hex of its SHA256 hash
// is equal to wantFullCertSHA256Hex and that it's a valid cert for c.ServerName.
// SetConfigExpectedCertHash configures c's VerifyPeerCertificate function to
// require that exactly 1 cert is presented (not counting any present MetaCert),
// and that the hex of its SHA256 hash is equal to wantFullCertSHA256Hex and
// that it's a valid cert for c.ServerName.
func SetConfigExpectedCertHash(c *tls.Config, wantFullCertSHA256Hex string) {
if c.VerifyPeerCertificate != nil {
panic("refusing to override tls.Config.VerifyPeerCertificate")
}
// Set InsecureSkipVerify to prevent crypto/tls from doing its
// own cert verification, but do the same work that it'd do
// (but using certDNSName) in the VerifyPeerCertificate hook.
// (but using certDNSName) in the VerifyConnection hook.
c.InsecureSkipVerify = true
c.VerifyConnection = nil
c.VerifyPeerCertificate = func(rawCerts [][]byte, _ [][]*x509.Certificate) error {
if len(rawCerts) == 0 {
return errors.New("no certs presented")
c.VerifyConnection = func(cs tls.ConnectionState) error {
dialedHost := cs.ServerName
var sawGoodCert bool
for _, cert := range cs.PeerCertificates {
if strings.HasPrefix(cert.Subject.CommonName, derpconst.MetaCertCommonNamePrefix) {
continue
}
if sawGoodCert {
return errors.New("unexpected multiple certs presented")
}
if fmt.Sprintf("%02x", sha256.Sum256(cert.Raw)) != wantFullCertSHA256Hex {
return fmt.Errorf("cert hash does not match expected cert hash")
}
if dialedHost != "" { // it's empty when dialing a derper by IP with no hostname
if err := cert.VerifyHostname(dialedHost); err != nil {
return fmt.Errorf("cert does not match server name %q: %w", dialedHost, err)
}
}
now := time.Now()
if now.After(cert.NotAfter) {
return fmt.Errorf("cert expired %v", cert.NotAfter)
}
if now.Before(cert.NotBefore) {
return fmt.Errorf("cert not yet valid until %v; is your clock correct?", cert.NotBefore)
}
sawGoodCert = true
}
if len(rawCerts) > 1 {
return errors.New("unexpected multiple certs presented")
}
if fmt.Sprintf("%02x", sha256.Sum256(rawCerts[0])) != wantFullCertSHA256Hex {
return fmt.Errorf("cert hash does not match expected cert hash")
}
cert, err := x509.ParseCertificate(rawCerts[0])
if err != nil {
return fmt.Errorf("ParseCertificate: %w", err)
}
if err := cert.VerifyHostname(c.ServerName); err != nil {
return fmt.Errorf("cert does not match server name %q: %w", c.ServerName, err)
}
now := time.Now()
if now.After(cert.NotAfter) {
return fmt.Errorf("cert expired %v", cert.NotAfter)
}
if now.Before(cert.NotBefore) {
return fmt.Errorf("cert not yet valid until %v; is your clock correct?", cert.NotBefore)
if !sawGoodCert {
return errors.New("expected cert not presented")
}
return nil
}
@@ -292,12 +311,8 @@ func SetConfigExpectedCertHash(c *tls.Config, wantFullCertSHA256Hex string) {
func NewTransport() *http.Transport {
return &http.Transport{
DialTLSContext: func(ctx context.Context, network, addr string) (net.Conn, error) {
host, _, err := net.SplitHostPort(addr)
if err != nil {
return nil, err
}
var d tls.Dialer
d.Config = Config(host, nil, nil)
d.Config = Config(nil, nil)
return d.DialContext(ctx, network, addr)
},
}