feat(tls): 新增 TLS 指纹模拟功能

This commit is contained in:
shaw
2026-01-18 20:06:56 +08:00
parent a07174c191
commit 9abda1bc59
20 changed files with 1823 additions and 11 deletions

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@@ -0,0 +1,564 @@
// Package tlsfingerprint provides TLS fingerprint simulation for HTTP clients.
// It uses the utls library to create TLS connections that mimic Node.js/Claude Code clients.
package tlsfingerprint
import (
"bufio"
"context"
"encoding/base64"
"fmt"
"log"
"net"
"net/http"
"net/url"
"github.com/gin-gonic/gin"
utls "github.com/refraction-networking/utls"
"golang.org/x/net/proxy"
)
// debugLog prints log only in non-release mode.
func debugLog(format string, v ...any) {
if gin.Mode() != gin.ReleaseMode {
log.Printf(format, v...)
}
}
// Profile contains TLS fingerprint configuration.
type Profile struct {
Name string // Profile name for identification
CipherSuites []uint16
Curves []uint16
PointFormats []uint8
EnableGREASE bool
}
// Dialer creates TLS connections with custom fingerprints.
type Dialer struct {
profile *Profile
baseDialer func(ctx context.Context, network, addr string) (net.Conn, error)
}
// HTTPProxyDialer creates TLS connections through HTTP/HTTPS proxies with custom fingerprints.
// It handles the CONNECT tunnel establishment before performing TLS handshake.
type HTTPProxyDialer struct {
profile *Profile
proxyURL *url.URL
}
// SOCKS5ProxyDialer creates TLS connections through SOCKS5 proxies with custom fingerprints.
// It uses golang.org/x/net/proxy to establish the SOCKS5 tunnel.
type SOCKS5ProxyDialer struct {
profile *Profile
proxyURL *url.URL
}
// Default TLS fingerprint values captured from Claude CLI 2.x (Node.js 20.x + OpenSSL 3.x)
// Captured using: tshark -i lo -f "tcp port 8443" -Y "tls.handshake.type == 1" -V
// JA3 Hash: 1a28e69016765d92e3b381168d68922c
//
// Note: JA3/JA4 may have slight variations due to:
// - Session ticket presence/absence
// - Extension negotiation state
var (
// defaultCipherSuites contains all 59 cipher suites from Claude CLI
// Order is critical for JA3 fingerprint matching
defaultCipherSuites = []uint16{
// TLS 1.3 cipher suites (MUST be first)
0x1302, // TLS_AES_256_GCM_SHA384
0x1303, // TLS_CHACHA20_POLY1305_SHA256
0x1301, // TLS_AES_128_GCM_SHA256
// ECDHE + AES-GCM
0xc02f, // TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
0xc02b, // TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
0xc030, // TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
0xc02c, // TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
// DHE + AES-GCM
0x009e, // TLS_DHE_RSA_WITH_AES_128_GCM_SHA256
// ECDHE/DHE + AES-CBC-SHA256/384
0xc027, // TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256
0x0067, // TLS_DHE_RSA_WITH_AES_128_CBC_SHA256
0xc028, // TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384
0x006b, // TLS_DHE_RSA_WITH_AES_256_CBC_SHA256
// DHE-DSS/RSA + AES-GCM
0x00a3, // TLS_DHE_DSS_WITH_AES_256_GCM_SHA384
0x009f, // TLS_DHE_RSA_WITH_AES_256_GCM_SHA384
// ChaCha20-Poly1305
0xcca9, // TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256
0xcca8, // TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256
0xccaa, // TLS_DHE_RSA_WITH_CHACHA20_POLY1305_SHA256
// AES-CCM (256-bit)
0xc0af, // TLS_ECDHE_ECDSA_WITH_AES_256_CCM_8
0xc0ad, // TLS_ECDHE_ECDSA_WITH_AES_256_CCM
0xc0a3, // TLS_DHE_RSA_WITH_AES_256_CCM_8
0xc09f, // TLS_DHE_RSA_WITH_AES_256_CCM
// ARIA (256-bit)
0xc05d, // TLS_ECDHE_ECDSA_WITH_ARIA_256_GCM_SHA384
0xc061, // TLS_ECDHE_RSA_WITH_ARIA_256_GCM_SHA384
0xc057, // TLS_DHE_DSS_WITH_ARIA_256_GCM_SHA384
0xc053, // TLS_DHE_RSA_WITH_ARIA_256_GCM_SHA384
// DHE-DSS + AES-GCM (128-bit)
0x00a2, // TLS_DHE_DSS_WITH_AES_128_GCM_SHA256
// AES-CCM (128-bit)
0xc0ae, // TLS_ECDHE_ECDSA_WITH_AES_128_CCM_8
0xc0ac, // TLS_ECDHE_ECDSA_WITH_AES_128_CCM
0xc0a2, // TLS_DHE_RSA_WITH_AES_128_CCM_8
0xc09e, // TLS_DHE_RSA_WITH_AES_128_CCM
// ARIA (128-bit)
0xc05c, // TLS_ECDHE_ECDSA_WITH_ARIA_128_GCM_SHA256
0xc060, // TLS_ECDHE_RSA_WITH_ARIA_128_GCM_SHA256
0xc056, // TLS_DHE_DSS_WITH_ARIA_128_GCM_SHA256
0xc052, // TLS_DHE_RSA_WITH_ARIA_128_GCM_SHA256
// ECDHE/DHE + AES-CBC-SHA384/256 (more)
0xc024, // TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384
0x006a, // TLS_DHE_DSS_WITH_AES_256_CBC_SHA256
0xc023, // TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256
0x0040, // TLS_DHE_DSS_WITH_AES_128_CBC_SHA256
// ECDHE/DHE + AES-CBC-SHA (legacy)
0xc00a, // TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA
0xc014, // TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA
0x0039, // TLS_DHE_RSA_WITH_AES_256_CBC_SHA
0x0038, // TLS_DHE_DSS_WITH_AES_256_CBC_SHA
0xc009, // TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA
0xc013, // TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA
0x0033, // TLS_DHE_RSA_WITH_AES_128_CBC_SHA
0x0032, // TLS_DHE_DSS_WITH_AES_128_CBC_SHA
// RSA + AES-GCM/CCM/ARIA (non-PFS, 256-bit)
0x009d, // TLS_RSA_WITH_AES_256_GCM_SHA384
0xc0a1, // TLS_RSA_WITH_AES_256_CCM_8
0xc09d, // TLS_RSA_WITH_AES_256_CCM
0xc051, // TLS_RSA_WITH_ARIA_256_GCM_SHA384
// RSA + AES-GCM/CCM/ARIA (non-PFS, 128-bit)
0x009c, // TLS_RSA_WITH_AES_128_GCM_SHA256
0xc0a0, // TLS_RSA_WITH_AES_128_CCM_8
0xc09c, // TLS_RSA_WITH_AES_128_CCM
0xc050, // TLS_RSA_WITH_ARIA_128_GCM_SHA256
// RSA + AES-CBC (non-PFS, legacy)
0x003d, // TLS_RSA_WITH_AES_256_CBC_SHA256
0x003c, // TLS_RSA_WITH_AES_128_CBC_SHA256
0x0035, // TLS_RSA_WITH_AES_256_CBC_SHA
0x002f, // TLS_RSA_WITH_AES_128_CBC_SHA
// Renegotiation indication
0x00ff, // TLS_EMPTY_RENEGOTIATION_INFO_SCSV
}
// defaultCurves contains the 10 supported groups from Claude CLI (including FFDHE)
defaultCurves = []utls.CurveID{
utls.X25519, // 0x001d
utls.CurveP256, // 0x0017 (secp256r1)
utls.CurveID(0x001e), // x448
utls.CurveP521, // 0x0019 (secp521r1)
utls.CurveP384, // 0x0018 (secp384r1)
utls.CurveID(0x0100), // ffdhe2048
utls.CurveID(0x0101), // ffdhe3072
utls.CurveID(0x0102), // ffdhe4096
utls.CurveID(0x0103), // ffdhe6144
utls.CurveID(0x0104), // ffdhe8192
}
// defaultPointFormats contains all 3 point formats from Claude CLI
defaultPointFormats = []uint8{
0, // uncompressed
1, // ansiX962_compressed_prime
2, // ansiX962_compressed_char2
}
// defaultSignatureAlgorithms contains the 20 signature algorithms from Claude CLI
defaultSignatureAlgorithms = []utls.SignatureScheme{
0x0403, // ecdsa_secp256r1_sha256
0x0503, // ecdsa_secp384r1_sha384
0x0603, // ecdsa_secp521r1_sha512
0x0807, // ed25519
0x0808, // ed448
0x0809, // rsa_pss_pss_sha256
0x080a, // rsa_pss_pss_sha384
0x080b, // rsa_pss_pss_sha512
0x0804, // rsa_pss_rsae_sha256
0x0805, // rsa_pss_rsae_sha384
0x0806, // rsa_pss_rsae_sha512
0x0401, // rsa_pkcs1_sha256
0x0501, // rsa_pkcs1_sha384
0x0601, // rsa_pkcs1_sha512
0x0303, // ecdsa_sha224
0x0301, // rsa_pkcs1_sha224
0x0302, // dsa_sha224
0x0402, // dsa_sha256
0x0502, // dsa_sha384
0x0602, // dsa_sha512
}
)
// NewDialer creates a new TLS fingerprint dialer.
// baseDialer is used for TCP connection establishment (supports proxy scenarios).
// If baseDialer is nil, direct TCP dial is used.
func NewDialer(profile *Profile, baseDialer func(ctx context.Context, network, addr string) (net.Conn, error)) *Dialer {
if baseDialer == nil {
baseDialer = (&net.Dialer{}).DialContext
}
return &Dialer{profile: profile, baseDialer: baseDialer}
}
// NewHTTPProxyDialer creates a new TLS fingerprint dialer that works through HTTP/HTTPS proxies.
// It establishes a CONNECT tunnel before performing TLS handshake with custom fingerprint.
func NewHTTPProxyDialer(profile *Profile, proxyURL *url.URL) *HTTPProxyDialer {
return &HTTPProxyDialer{profile: profile, proxyURL: proxyURL}
}
// NewSOCKS5ProxyDialer creates a new TLS fingerprint dialer that works through SOCKS5 proxies.
// It establishes a SOCKS5 tunnel before performing TLS handshake with custom fingerprint.
func NewSOCKS5ProxyDialer(profile *Profile, proxyURL *url.URL) *SOCKS5ProxyDialer {
return &SOCKS5ProxyDialer{profile: profile, proxyURL: proxyURL}
}
// DialTLSContext establishes a TLS connection through SOCKS5 proxy with the configured fingerprint.
// Flow: SOCKS5 CONNECT to target -> TLS handshake with utls on the tunnel
func (d *SOCKS5ProxyDialer) DialTLSContext(ctx context.Context, network, addr string) (net.Conn, error) {
debugLog("[TLS Fingerprint SOCKS5] Connecting through proxy %s for target %s", d.proxyURL.Host, addr)
// Step 1: Create SOCKS5 dialer
var auth *proxy.Auth
if d.proxyURL.User != nil {
username := d.proxyURL.User.Username()
password, _ := d.proxyURL.User.Password()
auth = &proxy.Auth{
User: username,
Password: password,
}
}
// Determine proxy address
proxyAddr := d.proxyURL.Host
if d.proxyURL.Port() == "" {
proxyAddr = net.JoinHostPort(d.proxyURL.Hostname(), "1080") // Default SOCKS5 port
}
socksDialer, err := proxy.SOCKS5("tcp", proxyAddr, auth, proxy.Direct)
if err != nil {
debugLog("[TLS Fingerprint SOCKS5] Failed to create SOCKS5 dialer: %v", err)
return nil, fmt.Errorf("create SOCKS5 dialer: %w", err)
}
// Step 2: Establish SOCKS5 tunnel to target
debugLog("[TLS Fingerprint SOCKS5] Establishing SOCKS5 tunnel to %s", addr)
conn, err := socksDialer.Dial("tcp", addr)
if err != nil {
debugLog("[TLS Fingerprint SOCKS5] Failed to connect through SOCKS5: %v", err)
return nil, fmt.Errorf("SOCKS5 connect: %w", err)
}
debugLog("[TLS Fingerprint SOCKS5] SOCKS5 tunnel established")
// Step 3: Perform TLS handshake on the tunnel with utls fingerprint
host, _, err := net.SplitHostPort(addr)
if err != nil {
host = addr
}
debugLog("[TLS Fingerprint SOCKS5] Starting TLS handshake to %s", host)
// Build ClientHello specification from profile (Node.js/Claude CLI fingerprint)
spec := buildClientHelloSpecFromProfile(d.profile)
debugLog("[TLS Fingerprint SOCKS5] ClientHello spec: CipherSuites=%d, Extensions=%d, CompressionMethods=%v, TLSVersMax=0x%04x, TLSVersMin=0x%04x",
len(spec.CipherSuites), len(spec.Extensions), spec.CompressionMethods, spec.TLSVersMax, spec.TLSVersMin)
if d.profile != nil {
debugLog("[TLS Fingerprint SOCKS5] Using profile: %s, GREASE: %v", d.profile.Name, d.profile.EnableGREASE)
}
// Create uTLS connection on the tunnel
tlsConn := utls.UClient(conn, &utls.Config{
ServerName: host,
}, utls.HelloCustom)
if err := tlsConn.ApplyPreset(spec); err != nil {
debugLog("[TLS Fingerprint SOCKS5] ApplyPreset failed: %v", err)
_ = conn.Close()
return nil, fmt.Errorf("apply TLS preset: %w", err)
}
if err := tlsConn.Handshake(); err != nil {
debugLog("[TLS Fingerprint SOCKS5] Handshake FAILED: %v", err)
_ = conn.Close()
return nil, fmt.Errorf("TLS handshake failed: %w", err)
}
state := tlsConn.ConnectionState()
debugLog("[TLS Fingerprint SOCKS5] Handshake SUCCESS - Version: 0x%04x, CipherSuite: 0x%04x, ALPN: %s",
state.Version, state.CipherSuite, state.NegotiatedProtocol)
return tlsConn, nil
}
// DialTLSContext establishes a TLS connection through HTTP proxy with the configured fingerprint.
// Flow: TCP connect to proxy -> CONNECT tunnel -> TLS handshake with utls
func (d *HTTPProxyDialer) DialTLSContext(ctx context.Context, network, addr string) (net.Conn, error) {
debugLog("[TLS Fingerprint HTTPProxy] Connecting to proxy %s for target %s", d.proxyURL.Host, addr)
// Step 1: TCP connect to proxy server
var proxyAddr string
if d.proxyURL.Port() != "" {
proxyAddr = d.proxyURL.Host
} else {
// Default ports
if d.proxyURL.Scheme == "https" {
proxyAddr = net.JoinHostPort(d.proxyURL.Hostname(), "443")
} else {
proxyAddr = net.JoinHostPort(d.proxyURL.Hostname(), "80")
}
}
dialer := &net.Dialer{}
conn, err := dialer.DialContext(ctx, "tcp", proxyAddr)
if err != nil {
debugLog("[TLS Fingerprint HTTPProxy] Failed to connect to proxy: %v", err)
return nil, fmt.Errorf("connect to proxy: %w", err)
}
debugLog("[TLS Fingerprint HTTPProxy] Connected to proxy %s", proxyAddr)
// Step 2: Send CONNECT request to establish tunnel
req := &http.Request{
Method: "CONNECT",
URL: &url.URL{Opaque: addr},
Host: addr,
Header: make(http.Header),
}
// Add proxy authentication if present
if d.proxyURL.User != nil {
username := d.proxyURL.User.Username()
password, _ := d.proxyURL.User.Password()
auth := base64.StdEncoding.EncodeToString([]byte(username + ":" + password))
req.Header.Set("Proxy-Authorization", "Basic "+auth)
}
debugLog("[TLS Fingerprint HTTPProxy] Sending CONNECT request for %s", addr)
if err := req.Write(conn); err != nil {
_ = conn.Close()
debugLog("[TLS Fingerprint HTTPProxy] Failed to write CONNECT request: %v", err)
return nil, fmt.Errorf("write CONNECT request: %w", err)
}
// Step 3: Read CONNECT response
br := bufio.NewReader(conn)
resp, err := http.ReadResponse(br, req)
if err != nil {
_ = conn.Close()
debugLog("[TLS Fingerprint HTTPProxy] Failed to read CONNECT response: %v", err)
return nil, fmt.Errorf("read CONNECT response: %w", err)
}
defer func() { _ = resp.Body.Close() }()
if resp.StatusCode != http.StatusOK {
_ = conn.Close()
debugLog("[TLS Fingerprint HTTPProxy] CONNECT failed with status: %d %s", resp.StatusCode, resp.Status)
return nil, fmt.Errorf("proxy CONNECT failed: %s", resp.Status)
}
debugLog("[TLS Fingerprint HTTPProxy] CONNECT tunnel established")
// Step 4: Perform TLS handshake on the tunnel with utls fingerprint
host, _, err := net.SplitHostPort(addr)
if err != nil {
host = addr
}
debugLog("[TLS Fingerprint HTTPProxy] Starting TLS handshake to %s", host)
// Build ClientHello specification (reuse the shared method)
spec := buildClientHelloSpecFromProfile(d.profile)
debugLog("[TLS Fingerprint HTTPProxy] ClientHello spec built with %d cipher suites, %d extensions",
len(spec.CipherSuites), len(spec.Extensions))
if d.profile != nil {
debugLog("[TLS Fingerprint HTTPProxy] Using profile: %s, GREASE: %v", d.profile.Name, d.profile.EnableGREASE)
}
// Create uTLS connection on the tunnel
// Note: TLS 1.3 cipher suites are handled automatically by utls when TLS 1.3 is in SupportedVersions
tlsConn := utls.UClient(conn, &utls.Config{
ServerName: host,
}, utls.HelloCustom)
if err := tlsConn.ApplyPreset(spec); err != nil {
debugLog("[TLS Fingerprint HTTPProxy] ApplyPreset failed: %v", err)
_ = conn.Close()
return nil, fmt.Errorf("apply TLS preset: %w", err)
}
if err := tlsConn.HandshakeContext(ctx); err != nil {
debugLog("[TLS Fingerprint HTTPProxy] Handshake FAILED: %v", err)
_ = conn.Close()
return nil, fmt.Errorf("TLS handshake failed: %w", err)
}
state := tlsConn.ConnectionState()
debugLog("[TLS Fingerprint HTTPProxy] Handshake SUCCESS - Version: 0x%04x, CipherSuite: 0x%04x, ALPN: %s",
state.Version, state.CipherSuite, state.NegotiatedProtocol)
return tlsConn, nil
}
// DialTLSContext establishes a TLS connection with the configured fingerprint.
// This method is designed to be used as http.Transport.DialTLSContext.
func (d *Dialer) DialTLSContext(ctx context.Context, network, addr string) (net.Conn, error) {
// Establish TCP connection using base dialer (supports proxy)
debugLog("[TLS Fingerprint] Dialing TCP to %s", addr)
conn, err := d.baseDialer(ctx, network, addr)
if err != nil {
debugLog("[TLS Fingerprint] TCP dial failed: %v", err)
return nil, err
}
debugLog("[TLS Fingerprint] TCP connected to %s", addr)
// Extract hostname for SNI
host, _, err := net.SplitHostPort(addr)
if err != nil {
host = addr
}
debugLog("[TLS Fingerprint] SNI hostname: %s", host)
// Build ClientHello specification
spec := d.buildClientHelloSpec()
debugLog("[TLS Fingerprint] ClientHello spec built with %d cipher suites, %d extensions",
len(spec.CipherSuites), len(spec.Extensions))
// Log profile info
if d.profile != nil {
debugLog("[TLS Fingerprint] Using profile: %s, GREASE: %v", d.profile.Name, d.profile.EnableGREASE)
} else {
debugLog("[TLS Fingerprint] Using default profile (no custom config)")
}
// Create uTLS connection
// Note: TLS 1.3 cipher suites are handled automatically by utls when TLS 1.3 is in SupportedVersions
tlsConn := utls.UClient(conn, &utls.Config{
ServerName: host,
}, utls.HelloCustom)
// Apply fingerprint
if err := tlsConn.ApplyPreset(spec); err != nil {
debugLog("[TLS Fingerprint] ApplyPreset failed: %v", err)
_ = conn.Close()
return nil, err
}
debugLog("[TLS Fingerprint] Preset applied, starting handshake...")
// Perform TLS handshake
if err := tlsConn.HandshakeContext(ctx); err != nil {
debugLog("[TLS Fingerprint] Handshake FAILED: %v", err)
// Log more details about the connection state
debugLog("[TLS Fingerprint] Connection state - Local: %v, Remote: %v",
conn.LocalAddr(), conn.RemoteAddr())
_ = conn.Close()
return nil, fmt.Errorf("TLS handshake failed: %w", err)
}
// Log successful handshake details
state := tlsConn.ConnectionState()
debugLog("[TLS Fingerprint] Handshake SUCCESS - Version: 0x%04x, CipherSuite: 0x%04x, ALPN: %s",
state.Version, state.CipherSuite, state.NegotiatedProtocol)
return tlsConn, nil
}
// buildClientHelloSpec constructs the ClientHello specification based on the profile.
func (d *Dialer) buildClientHelloSpec() *utls.ClientHelloSpec {
return buildClientHelloSpecFromProfile(d.profile)
}
// toUTLSCurves converts uint16 slice to utls.CurveID slice.
func toUTLSCurves(curves []uint16) []utls.CurveID {
result := make([]utls.CurveID, len(curves))
for i, c := range curves {
result[i] = utls.CurveID(c)
}
return result
}
// buildClientHelloSpecFromProfile constructs ClientHelloSpec from a Profile.
// This is a standalone function that can be used by both Dialer and HTTPProxyDialer.
func buildClientHelloSpecFromProfile(profile *Profile) *utls.ClientHelloSpec {
// Get cipher suites
var cipherSuites []uint16
if profile != nil && len(profile.CipherSuites) > 0 {
cipherSuites = profile.CipherSuites
} else {
cipherSuites = defaultCipherSuites
}
// Get curves
var curves []utls.CurveID
if profile != nil && len(profile.Curves) > 0 {
curves = toUTLSCurves(profile.Curves)
} else {
curves = defaultCurves
}
// Get point formats
var pointFormats []uint8
if profile != nil && len(profile.PointFormats) > 0 {
pointFormats = profile.PointFormats
} else {
pointFormats = defaultPointFormats
}
// Check if GREASE is enabled
enableGREASE := profile != nil && profile.EnableGREASE
extensions := make([]utls.TLSExtension, 0, 16)
if enableGREASE {
extensions = append(extensions, &utls.UtlsGREASEExtension{})
}
// SNI extension - MUST be explicitly added for HelloCustom mode
// utls will populate the server name from Config.ServerName
extensions = append(extensions, &utls.SNIExtension{})
// Claude CLI extension order (captured from tshark):
// server_name(0), ec_point_formats(11), supported_groups(10), session_ticket(35),
// alpn(16), encrypt_then_mac(22), extended_master_secret(23),
// signature_algorithms(13), supported_versions(43),
// psk_key_exchange_modes(45), key_share(51)
extensions = append(extensions,
&utls.SupportedPointsExtension{SupportedPoints: pointFormats},
&utls.SupportedCurvesExtension{Curves: curves},
&utls.SessionTicketExtension{},
&utls.ALPNExtension{AlpnProtocols: []string{"http/1.1"}},
&utls.GenericExtension{Id: 22},
&utls.ExtendedMasterSecretExtension{},
&utls.SignatureAlgorithmsExtension{SupportedSignatureAlgorithms: defaultSignatureAlgorithms},
&utls.SupportedVersionsExtension{Versions: []uint16{
utls.VersionTLS13,
utls.VersionTLS12,
}},
&utls.PSKKeyExchangeModesExtension{Modes: []uint8{utls.PskModeDHE}},
&utls.KeyShareExtension{KeyShares: []utls.KeyShare{
{Group: utls.X25519},
}},
)
if enableGREASE {
extensions = append(extensions, &utls.UtlsGREASEExtension{})
}
return &utls.ClientHelloSpec{
CipherSuites: cipherSuites,
CompressionMethods: []uint8{0}, // null compression only (standard)
Extensions: extensions,
TLSVersMax: utls.VersionTLS13,
TLSVersMin: utls.VersionTLS10,
}
}

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@@ -0,0 +1,307 @@
// Package tlsfingerprint provides TLS fingerprint simulation for HTTP clients.
//
// Integration tests for verifying TLS fingerprint correctness.
// These tests make actual network requests and should be run manually.
//
// Run with: go test -v ./internal/pkg/tlsfingerprint/...
// Run integration tests: go test -v -run TestJA3 ./internal/pkg/tlsfingerprint/...
package tlsfingerprint
import (
"context"
"encoding/json"
"io"
"net/http"
"net/url"
"strings"
"testing"
"time"
)
// FingerprintResponse represents the response from tls.peet.ws/api/all.
type FingerprintResponse struct {
IP string `json:"ip"`
TLS TLSInfo `json:"tls"`
HTTP2 any `json:"http2"`
}
// TLSInfo contains TLS fingerprint details.
type TLSInfo struct {
JA3 string `json:"ja3"`
JA3Hash string `json:"ja3_hash"`
JA4 string `json:"ja4"`
PeetPrint string `json:"peetprint"`
PeetPrintHash string `json:"peetprint_hash"`
ClientRandom string `json:"client_random"`
SessionID string `json:"session_id"`
}
// TestDialerBasicConnection tests that the dialer can establish TLS connections.
func TestDialerBasicConnection(t *testing.T) {
if testing.Short() {
t.Skip("skipping network test in short mode")
}
// Create a dialer with default profile
profile := &Profile{
Name: "Test Profile",
EnableGREASE: false,
}
dialer := NewDialer(profile, nil)
// Create HTTP client with custom TLS dialer
client := &http.Client{
Transport: &http.Transport{
DialTLSContext: dialer.DialTLSContext,
},
Timeout: 30 * time.Second,
}
// Make a request to a known HTTPS endpoint
resp, err := client.Get("https://www.google.com")
if err != nil {
t.Fatalf("failed to connect: %v", err)
}
defer func() { _ = resp.Body.Close() }()
if resp.StatusCode != http.StatusOK {
t.Errorf("expected status 200, got %d", resp.StatusCode)
}
}
// TestJA3Fingerprint verifies the JA3/JA4 fingerprint matches expected value.
// This test uses tls.peet.ws to verify the fingerprint.
// Expected JA3 hash: 1a28e69016765d92e3b381168d68922c (Claude CLI / Node.js 20.x)
// Expected JA4: t13d5911h1_a33745022dd6_1f22a2ca17c4 (d=domain) or t13i5911h1_... (i=IP)
func TestJA3Fingerprint(t *testing.T) {
// Skip if network is unavailable or if running in short mode
if testing.Short() {
t.Skip("skipping integration test in short mode")
}
profile := &Profile{
Name: "Claude CLI Test",
EnableGREASE: false,
}
dialer := NewDialer(profile, nil)
client := &http.Client{
Transport: &http.Transport{
DialTLSContext: dialer.DialTLSContext,
},
Timeout: 30 * time.Second,
}
// Use tls.peet.ws fingerprint detection API
ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
defer cancel()
req, err := http.NewRequestWithContext(ctx, "GET", "https://tls.peet.ws/api/all", nil)
if err != nil {
t.Fatalf("failed to create request: %v", err)
}
req.Header.Set("User-Agent", "Claude Code/2.0.0 Node.js/20.0.0")
resp, err := client.Do(req)
if err != nil {
t.Fatalf("failed to get fingerprint: %v", err)
}
defer func() { _ = resp.Body.Close() }()
body, err := io.ReadAll(resp.Body)
if err != nil {
t.Fatalf("failed to read response: %v", err)
}
var fpResp FingerprintResponse
if err := json.Unmarshal(body, &fpResp); err != nil {
t.Logf("Response body: %s", string(body))
t.Fatalf("failed to parse fingerprint response: %v", err)
}
// Log all fingerprint information
t.Logf("JA3: %s", fpResp.TLS.JA3)
t.Logf("JA3 Hash: %s", fpResp.TLS.JA3Hash)
t.Logf("JA4: %s", fpResp.TLS.JA4)
t.Logf("PeetPrint: %s", fpResp.TLS.PeetPrint)
t.Logf("PeetPrint Hash: %s", fpResp.TLS.PeetPrintHash)
// Verify JA3 hash matches expected value
expectedJA3Hash := "1a28e69016765d92e3b381168d68922c"
if fpResp.TLS.JA3Hash == expectedJA3Hash {
t.Logf("✓ JA3 hash matches expected value: %s", expectedJA3Hash)
} else {
t.Errorf("✗ JA3 hash mismatch: got %s, expected %s", fpResp.TLS.JA3Hash, expectedJA3Hash)
}
// Verify JA4 fingerprint
// JA4 format: t[version][sni][cipher_count][ext_count][alpn]_[cipher_hash]_[ext_hash]
// Expected: t13d5910h1 (d=domain) or t13i5910h1 (i=IP)
// The suffix _a33745022dd6_1f22a2ca17c4 should match
expectedJA4Suffix := "_a33745022dd6_1f22a2ca17c4"
if strings.HasSuffix(fpResp.TLS.JA4, expectedJA4Suffix) {
t.Logf("✓ JA4 suffix matches expected value: %s", expectedJA4Suffix)
} else {
t.Errorf("✗ JA4 suffix mismatch: got %s, expected suffix %s", fpResp.TLS.JA4, expectedJA4Suffix)
}
// Verify JA4 prefix (t13d5911h1 or t13i5911h1)
// d = domain (SNI present), i = IP (no SNI)
// Since we connect to tls.peet.ws (domain), we expect 'd'
expectedJA4Prefix := "t13d5911h1"
if strings.HasPrefix(fpResp.TLS.JA4, expectedJA4Prefix) {
t.Logf("✓ JA4 prefix matches: %s (t13=TLS1.3, d=domain, 59=ciphers, 11=extensions, h1=HTTP/1.1)", expectedJA4Prefix)
} else {
// Also accept 'i' variant for IP connections
altPrefix := "t13i5911h1"
if strings.HasPrefix(fpResp.TLS.JA4, altPrefix) {
t.Logf("✓ JA4 prefix matches (IP variant): %s", altPrefix)
} else {
t.Errorf("✗ JA4 prefix mismatch: got %s, expected %s or %s", fpResp.TLS.JA4, expectedJA4Prefix, altPrefix)
}
}
// Verify JA3 contains expected cipher suites (TLS 1.3 ciphers at the beginning)
if strings.Contains(fpResp.TLS.JA3, "4866-4867-4865") {
t.Logf("✓ JA3 contains expected TLS 1.3 cipher suites")
} else {
t.Logf("Warning: JA3 does not contain expected TLS 1.3 cipher suites")
}
// Verify extension list (should be 11 extensions including SNI)
// Expected: 0-11-10-35-16-22-23-13-43-45-51
expectedExtensions := "0-11-10-35-16-22-23-13-43-45-51"
if strings.Contains(fpResp.TLS.JA3, expectedExtensions) {
t.Logf("✓ JA3 contains expected extension list: %s", expectedExtensions)
} else {
t.Logf("Warning: JA3 extension list may differ")
}
}
// TestDialerWithProfile tests that different profiles produce different fingerprints.
func TestDialerWithProfile(t *testing.T) {
// Create two dialers with different profiles
profile1 := &Profile{
Name: "Profile 1 - No GREASE",
EnableGREASE: false,
}
profile2 := &Profile{
Name: "Profile 2 - With GREASE",
EnableGREASE: true,
}
dialer1 := NewDialer(profile1, nil)
dialer2 := NewDialer(profile2, nil)
// Build specs and compare
// Note: We can't directly compare JA3 without making network requests
// but we can verify the specs are different
spec1 := dialer1.buildClientHelloSpec()
spec2 := dialer2.buildClientHelloSpec()
// Profile with GREASE should have more extensions
if len(spec2.Extensions) <= len(spec1.Extensions) {
t.Error("expected GREASE profile to have more extensions")
}
}
// TestHTTPProxyDialerBasic tests HTTP proxy dialer creation.
// Note: This is a unit test - actual proxy testing requires a proxy server.
func TestHTTPProxyDialerBasic(t *testing.T) {
profile := &Profile{
Name: "Test Profile",
EnableGREASE: false,
}
// Test that dialer is created without panic
proxyURL := mustParseURL("http://proxy.example.com:8080")
dialer := NewHTTPProxyDialer(profile, proxyURL)
if dialer == nil {
t.Fatal("expected dialer to be created")
}
if dialer.profile != profile {
t.Error("expected profile to be set")
}
if dialer.proxyURL != proxyURL {
t.Error("expected proxyURL to be set")
}
}
// TestSOCKS5ProxyDialerBasic tests SOCKS5 proxy dialer creation.
// Note: This is a unit test - actual proxy testing requires a proxy server.
func TestSOCKS5ProxyDialerBasic(t *testing.T) {
profile := &Profile{
Name: "Test Profile",
EnableGREASE: false,
}
// Test that dialer is created without panic
proxyURL := mustParseURL("socks5://proxy.example.com:1080")
dialer := NewSOCKS5ProxyDialer(profile, proxyURL)
if dialer == nil {
t.Fatal("expected dialer to be created")
}
if dialer.profile != profile {
t.Error("expected profile to be set")
}
if dialer.proxyURL != proxyURL {
t.Error("expected proxyURL to be set")
}
}
// TestBuildClientHelloSpec tests ClientHello spec construction.
func TestBuildClientHelloSpec(t *testing.T) {
// Test with nil profile (should use defaults)
spec := buildClientHelloSpecFromProfile(nil)
if len(spec.CipherSuites) == 0 {
t.Error("expected cipher suites to be set")
}
if len(spec.Extensions) == 0 {
t.Error("expected extensions to be set")
}
// Verify default cipher suites are used
if len(spec.CipherSuites) != len(defaultCipherSuites) {
t.Errorf("expected %d cipher suites, got %d", len(defaultCipherSuites), len(spec.CipherSuites))
}
// Test with custom profile
customProfile := &Profile{
Name: "Custom",
EnableGREASE: false,
CipherSuites: []uint16{0x1301, 0x1302},
}
spec = buildClientHelloSpecFromProfile(customProfile)
if len(spec.CipherSuites) != 2 {
t.Errorf("expected 2 cipher suites, got %d", len(spec.CipherSuites))
}
}
// TestToUTLSCurves tests curve ID conversion.
func TestToUTLSCurves(t *testing.T) {
input := []uint16{0x001d, 0x0017, 0x0018}
result := toUTLSCurves(input)
if len(result) != len(input) {
t.Errorf("expected %d curves, got %d", len(input), len(result))
}
for i, curve := range result {
if uint16(curve) != input[i] {
t.Errorf("curve %d: expected 0x%04x, got 0x%04x", i, input[i], uint16(curve))
}
}
}
// Helper function to parse URL without error handling.
func mustParseURL(rawURL string) *url.URL {
u, err := url.Parse(rawURL)
if err != nil {
panic(err)
}
return u
}

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@@ -0,0 +1,170 @@
// Package tlsfingerprint provides TLS fingerprint simulation for HTTP clients.
package tlsfingerprint
import (
"sort"
"sync"
"github.com/Wei-Shaw/sub2api/internal/config"
)
// DefaultProfileName is the name of the built-in Claude CLI profile.
const DefaultProfileName = "claude_cli_v2"
// Registry manages TLS fingerprint profiles.
// It holds a collection of profiles that can be used for TLS fingerprint simulation.
// Profiles are selected based on account ID using modulo operation.
type Registry struct {
mu sync.RWMutex
profiles map[string]*Profile
profileNames []string // Sorted list of profile names for deterministic selection
}
// NewRegistry creates a new TLS fingerprint profile registry.
// It initializes with the built-in default profile.
func NewRegistry() *Registry {
r := &Registry{
profiles: make(map[string]*Profile),
profileNames: make([]string, 0),
}
// Register the built-in default profile
r.registerBuiltinProfile()
return r
}
// NewRegistryFromConfig creates a new registry and loads profiles from config.
// If the config has custom profiles defined, they will be merged with the built-in default.
func NewRegistryFromConfig(cfg *config.TLSFingerprintConfig) *Registry {
r := NewRegistry()
if cfg == nil || !cfg.Enabled {
debugLog("[TLS Registry] TLS fingerprint disabled or no config, using default profile only")
return r
}
// Load custom profiles from config
for name, profileCfg := range cfg.Profiles {
profile := &Profile{
Name: profileCfg.Name,
EnableGREASE: profileCfg.EnableGREASE,
CipherSuites: profileCfg.CipherSuites,
Curves: profileCfg.Curves,
PointFormats: profileCfg.PointFormats,
}
// If the profile has empty values, they will use defaults in dialer
r.RegisterProfile(name, profile)
debugLog("[TLS Registry] Loaded custom profile: %s (%s)", name, profileCfg.Name)
}
debugLog("[TLS Registry] Initialized with %d profiles: %v", len(r.profileNames), r.profileNames)
return r
}
// registerBuiltinProfile adds the default Claude CLI profile to the registry.
func (r *Registry) registerBuiltinProfile() {
defaultProfile := &Profile{
Name: "Claude CLI 2.x (Node.js 20.x + OpenSSL 3.x)",
EnableGREASE: false, // Node.js does not use GREASE
// Empty slices will cause dialer to use built-in defaults
CipherSuites: nil,
Curves: nil,
PointFormats: nil,
}
r.RegisterProfile(DefaultProfileName, defaultProfile)
}
// RegisterProfile adds or updates a profile in the registry.
func (r *Registry) RegisterProfile(name string, profile *Profile) {
r.mu.Lock()
defer r.mu.Unlock()
// Check if this is a new profile
_, exists := r.profiles[name]
r.profiles[name] = profile
if !exists {
r.profileNames = append(r.profileNames, name)
// Keep names sorted for deterministic selection
sort.Strings(r.profileNames)
}
}
// GetProfile returns a profile by name.
// Returns nil if the profile does not exist.
func (r *Registry) GetProfile(name string) *Profile {
r.mu.RLock()
defer r.mu.RUnlock()
return r.profiles[name]
}
// GetDefaultProfile returns the built-in default profile.
func (r *Registry) GetDefaultProfile() *Profile {
return r.GetProfile(DefaultProfileName)
}
// GetProfileByAccountID returns a profile for the given account ID.
// The profile is selected using: profileNames[accountID % len(profiles)]
// This ensures deterministic profile assignment for each account.
func (r *Registry) GetProfileByAccountID(accountID int64) *Profile {
r.mu.RLock()
defer r.mu.RUnlock()
if len(r.profileNames) == 0 {
return nil
}
// Use modulo to select profile index
// Use absolute value to handle negative IDs (though unlikely)
idx := accountID
if idx < 0 {
idx = -idx
}
selectedIndex := int(idx % int64(len(r.profileNames)))
selectedName := r.profileNames[selectedIndex]
return r.profiles[selectedName]
}
// ProfileCount returns the number of registered profiles.
func (r *Registry) ProfileCount() int {
r.mu.RLock()
defer r.mu.RUnlock()
return len(r.profiles)
}
// ProfileNames returns a sorted list of all registered profile names.
func (r *Registry) ProfileNames() []string {
r.mu.RLock()
defer r.mu.RUnlock()
// Return a copy to prevent modification
names := make([]string, len(r.profileNames))
copy(names, r.profileNames)
return names
}
// Global registry instance for convenience
var globalRegistry *Registry
var globalRegistryOnce sync.Once
// GlobalRegistry returns the global TLS fingerprint registry.
// The registry is lazily initialized with the default profile.
func GlobalRegistry() *Registry {
globalRegistryOnce.Do(func() {
globalRegistry = NewRegistry()
})
return globalRegistry
}
// InitGlobalRegistry initializes the global registry with configuration.
// This should be called during application startup.
// It is safe to call multiple times; subsequent calls will update the registry.
func InitGlobalRegistry(cfg *config.TLSFingerprintConfig) *Registry {
globalRegistryOnce.Do(func() {
globalRegistry = NewRegistryFromConfig(cfg)
})
return globalRegistry
}

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package tlsfingerprint
import (
"testing"
"github.com/Wei-Shaw/sub2api/internal/config"
)
func TestNewRegistry(t *testing.T) {
r := NewRegistry()
// Should have exactly one profile (the default)
if r.ProfileCount() != 1 {
t.Errorf("expected 1 profile, got %d", r.ProfileCount())
}
// Should have the default profile
profile := r.GetDefaultProfile()
if profile == nil {
t.Error("expected default profile to exist")
}
// Default profile name should be in the list
names := r.ProfileNames()
if len(names) != 1 || names[0] != DefaultProfileName {
t.Errorf("expected profile names to be [%s], got %v", DefaultProfileName, names)
}
}
func TestRegisterProfile(t *testing.T) {
r := NewRegistry()
// Register a new profile
customProfile := &Profile{
Name: "Custom Profile",
EnableGREASE: true,
}
r.RegisterProfile("custom", customProfile)
// Should now have 2 profiles
if r.ProfileCount() != 2 {
t.Errorf("expected 2 profiles, got %d", r.ProfileCount())
}
// Should be able to retrieve the custom profile
retrieved := r.GetProfile("custom")
if retrieved == nil {
t.Fatal("expected custom profile to exist")
}
if retrieved.Name != "Custom Profile" {
t.Errorf("expected profile name 'Custom Profile', got '%s'", retrieved.Name)
}
if !retrieved.EnableGREASE {
t.Error("expected EnableGREASE to be true")
}
}
func TestGetProfile(t *testing.T) {
r := NewRegistry()
// Get existing profile
profile := r.GetProfile(DefaultProfileName)
if profile == nil {
t.Error("expected default profile to exist")
}
// Get non-existing profile
nonExistent := r.GetProfile("nonexistent")
if nonExistent != nil {
t.Error("expected nil for non-existent profile")
}
}
func TestGetProfileByAccountID(t *testing.T) {
r := NewRegistry()
// With only default profile, all account IDs should return the same profile
for i := int64(0); i < 10; i++ {
profile := r.GetProfileByAccountID(i)
if profile == nil {
t.Errorf("expected profile for account %d, got nil", i)
}
}
// Add more profiles
r.RegisterProfile("profile_a", &Profile{Name: "Profile A"})
r.RegisterProfile("profile_b", &Profile{Name: "Profile B"})
// Now we have 3 profiles: claude_cli_v2, profile_a, profile_b
// Names are sorted, so order is: claude_cli_v2, profile_a, profile_b
expectedOrder := []string{DefaultProfileName, "profile_a", "profile_b"}
names := r.ProfileNames()
for i, name := range expectedOrder {
if names[i] != name {
t.Errorf("expected name at index %d to be %s, got %s", i, name, names[i])
}
}
// Test modulo selection
// Account ID 0 % 3 = 0 -> claude_cli_v2
// Account ID 1 % 3 = 1 -> profile_a
// Account ID 2 % 3 = 2 -> profile_b
// Account ID 3 % 3 = 0 -> claude_cli_v2
testCases := []struct {
accountID int64
expectedName string
}{
{0, "Claude CLI 2.x (Node.js 20.x + OpenSSL 3.x)"},
{1, "Profile A"},
{2, "Profile B"},
{3, "Claude CLI 2.x (Node.js 20.x + OpenSSL 3.x)"},
{4, "Profile A"},
{5, "Profile B"},
{100, "Profile A"}, // 100 % 3 = 1
{-1, "Profile A"}, // |-1| % 3 = 1
{-3, "Claude CLI 2.x (Node.js 20.x + OpenSSL 3.x)"}, // |-3| % 3 = 0
}
for _, tc := range testCases {
profile := r.GetProfileByAccountID(tc.accountID)
if profile == nil {
t.Errorf("expected profile for account %d, got nil", tc.accountID)
continue
}
if profile.Name != tc.expectedName {
t.Errorf("account %d: expected profile name '%s', got '%s'", tc.accountID, tc.expectedName, profile.Name)
}
}
}
func TestNewRegistryFromConfig(t *testing.T) {
// Test with nil config
r := NewRegistryFromConfig(nil)
if r.ProfileCount() != 1 {
t.Errorf("expected 1 profile with nil config, got %d", r.ProfileCount())
}
// Test with disabled config
disabledCfg := &config.TLSFingerprintConfig{
Enabled: false,
}
r = NewRegistryFromConfig(disabledCfg)
if r.ProfileCount() != 1 {
t.Errorf("expected 1 profile with disabled config, got %d", r.ProfileCount())
}
// Test with enabled config and custom profiles
enabledCfg := &config.TLSFingerprintConfig{
Enabled: true,
Profiles: map[string]config.TLSProfileConfig{
"custom1": {
Name: "Custom Profile 1",
EnableGREASE: true,
},
"custom2": {
Name: "Custom Profile 2",
EnableGREASE: false,
},
},
}
r = NewRegistryFromConfig(enabledCfg)
// Should have 3 profiles: default + 2 custom
if r.ProfileCount() != 3 {
t.Errorf("expected 3 profiles, got %d", r.ProfileCount())
}
// Check custom profiles exist
custom1 := r.GetProfile("custom1")
if custom1 == nil || custom1.Name != "Custom Profile 1" {
t.Error("expected custom1 profile to exist with correct name")
}
custom2 := r.GetProfile("custom2")
if custom2 == nil || custom2.Name != "Custom Profile 2" {
t.Error("expected custom2 profile to exist with correct name")
}
}
func TestProfileNames(t *testing.T) {
r := NewRegistry()
// Add profiles in non-alphabetical order
r.RegisterProfile("zebra", &Profile{Name: "Zebra"})
r.RegisterProfile("alpha", &Profile{Name: "Alpha"})
r.RegisterProfile("beta", &Profile{Name: "Beta"})
names := r.ProfileNames()
// Should be sorted alphabetically
expected := []string{"alpha", "beta", DefaultProfileName, "zebra"}
if len(names) != len(expected) {
t.Errorf("expected %d names, got %d", len(expected), len(names))
}
for i, name := range expected {
if names[i] != name {
t.Errorf("expected name at index %d to be %s, got %s", i, name, names[i])
}
}
// Test that returned slice is a copy (modifying it shouldn't affect registry)
names[0] = "modified"
originalNames := r.ProfileNames()
if originalNames[0] == "modified" {
t.Error("modifying returned slice should not affect registry")
}
}
func TestConcurrentAccess(t *testing.T) {
r := NewRegistry()
// Run concurrent reads and writes
done := make(chan bool)
// Writers
for i := 0; i < 10; i++ {
go func(id int) {
for j := 0; j < 100; j++ {
r.RegisterProfile("concurrent"+string(rune('0'+id)), &Profile{Name: "Concurrent"})
}
done <- true
}(i)
}
// Readers
for i := 0; i < 10; i++ {
go func(id int) {
for j := 0; j < 100; j++ {
_ = r.ProfileCount()
_ = r.ProfileNames()
_ = r.GetProfileByAccountID(int64(id * j))
_ = r.GetProfile(DefaultProfileName)
}
done <- true
}(i)
}
// Wait for all goroutines
for i := 0; i < 20; i++ {
<-done
}
// Test should pass without data races (run with -race flag)
}