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Fix android ping

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9seconds
2026-03-13 16:20:18 +01:00
parent 6d8d2961e8
commit 45b0964afd
3 changed files with 21 additions and 34 deletions
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mtglib/internal/tls/fake/server_side.go
+3 -6
View File
@@ -32,27 +32,24 @@ var serverHelloSuffix = []byte{
0x00, 0x20, // 32 bytes of key
}
func SendServerHello(w io.Writer, secret []byte, clientHello *ClientHello) ([]byte, error) {
func SendServerHello(w io.Writer, secret []byte, clientHello *ClientHello) error {
buf := &bytes.Buffer{}
buf.Grow(tls.MaxRecordSize)
generateServerHello(buf, clientHello)
generateChangeCipherValue(buf)
noise := &bytes.Buffer{}
generateNoise(noise)
generateNoise(buf)
packet := buf.Bytes()
digest := hmac.New(sha256.New, secret)
digest.Write(clientHello.Random[:])
digest.Write(packet)
digest.Write(noise.Bytes())
copy(packet[RandomOffset:], digest.Sum(nil))
_, err := w.Write(packet)
return noise.Bytes()[tls.SizeHeader:], err
return err
}
func generateServerHello(buf *bytes.Buffer, hello *ClientHello) {
mtglib/internal/tls/fake/server_side_test.go
+11 -14
View File
@@ -38,7 +38,7 @@ func (suite *SendServerHelloTestSuite) SetupTest() {
}
func (suite *SendServerHelloTestSuite) TestRecordStructure() {
noise, err := fake.SendServerHello(suite.buf, suite.secret.Key[:], suite.hello)
err := fake.SendServerHello(suite.buf, suite.secret.Key[:], suite.hello)
suite.NoError(err)
var rec bytes.Buffer
@@ -53,14 +53,18 @@ func (suite *SendServerHelloTestSuite) TestRecordStructure() {
suite.NoError(err)
suite.Equal(byte(tls.TypeChangeCipherSpec), recordType)
suite.Empty(suite.buf.Bytes())
rec.Reset()
// noise is raw payload without TLS record header
suite.Len(noise, 1369)
recordType, length, err := tls.ReadRecord(suite.buf, &rec)
suite.NoError(err)
suite.Equal(byte(tls.TypeApplicationData), recordType)
suite.Equal(int64(1369), length)
suite.Empty(suite.buf.Bytes())
}
func (suite *SendServerHelloTestSuite) TestHMAC() {
noise, err := fake.SendServerHello(suite.buf, suite.secret.Key[:], suite.hello)
err := fake.SendServerHello(suite.buf, suite.secret.Key[:], suite.hello)
suite.NoError(err)
packet := make([]byte, suite.buf.Len())
@@ -74,18 +78,11 @@ func (suite *SendServerHelloTestSuite) TestHMAC() {
mac.Write(suite.hello.Random[:])
mac.Write(packet)
// HMAC is computed over the full noise TLS record (with header),
// but SendServerHello returns noise without the header,
// so we reconstruct the full record.
var fullNoise bytes.Buffer
tls.WriteRecord(&fullNoise, noise) //nolint: errcheck
mac.Write(fullNoise.Bytes())
suite.Equal(random, mac.Sum(nil))
}
func (suite *SendServerHelloTestSuite) TestHandshakePayload() {
_, err := fake.SendServerHello(suite.buf, suite.secret.Key[:], suite.hello)
err := fake.SendServerHello(suite.buf, suite.secret.Key[:], suite.hello)
suite.NoError(err)
packet := suite.buf.Bytes()
@@ -107,7 +104,7 @@ func (suite *SendServerHelloTestSuite) TestHandshakePayload() {
}
func (suite *SendServerHelloTestSuite) TestChangeCipherSpec() {
_, err := fake.SendServerHello(suite.buf, suite.secret.Key[:], suite.hello)
err := fake.SendServerHello(suite.buf, suite.secret.Key[:], suite.hello)
suite.NoError(err)
// Skip first record