1 files changed, 287 insertions, 0 deletions
diff --git a/src/crypto/tls/conn_test.go b/src/crypto/tls/conn_test.go
new file mode 100644
index 0000000..78935b1
--- /dev/null
+++ b/src/crypto/tls/conn_test.go
@@ -0,0 +1,287 @@
+// Copyright 2010 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package tls
+
+import (
+	"bytes"
+	"io"
+	"net"
+	"testing"
+)
+
+func TestRoundUp(t *testing.T) {
+	if roundUp(0, 16) != 0 ||
+		roundUp(1, 16) != 16 ||
+		roundUp(15, 16) != 16 ||
+		roundUp(16, 16) != 16 ||
+		roundUp(17, 16) != 32 {
+		t.Error("roundUp broken")
+	}
+}
+
+// will be initialized with {0, 255, 255, ..., 255}
+var padding255Bad = [256]byte{}
+
+// will be initialized with {255, 255, 255, ..., 255}
+var padding255Good = [256]byte{255}
+
+var paddingTests = []struct {
+	in          []byte
+	good        bool
+	expectedLen int
+}{
+	{[]byte{1, 2, 3, 4, 0}, true, 4},
+	{[]byte{1, 2, 3, 4, 0, 1}, false, 0},
+	{[]byte{1, 2, 3, 4, 99, 99}, false, 0},
+	{[]byte{1, 2, 3, 4, 1, 1}, true, 4},
+	{[]byte{1, 2, 3, 2, 2, 2}, true, 3},
+	{[]byte{1, 2, 3, 3, 3, 3}, true, 2},
+	{[]byte{1, 2, 3, 4, 3, 3}, false, 0},
+	{[]byte{1, 4, 4, 4, 4, 4}, true, 1},
+	{[]byte{5, 5, 5, 5, 5, 5}, true, 0},
+	{[]byte{6, 6, 6, 6, 6, 6}, false, 0},
+	{padding255Bad[:], false, 0},
+	{padding255Good[:], true, 0},
+}
+
+func TestRemovePadding(t *testing.T) {
+	for i := 1; i < len(padding255Bad); i++ {
+		padding255Bad[i] = 255
+		padding255Good[i] = 255
+	}
+	for i, test := range paddingTests {
+		paddingLen, good := extractPadding(test.in)
+		expectedGood := byte(255)
+		if !test.good {
+			expectedGood = 0
+		}
+		if good != expectedGood {
+			t.Errorf("#%d: wrong validity, want:%d got:%d", i, expectedGood, good)
+		}
+		if good == 255 && len(test.in)-paddingLen != test.expectedLen {
+			t.Errorf("#%d: got %d, want %d", i, len(test.in)-paddingLen, test.expectedLen)
+		}
+	}
+}
+
+var certExampleCom = `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`
+
+var certWildcardExampleCom = `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`
+
+var certFooExampleCom = `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`
+
+func TestCertificateSelection(t *testing.T) {
+	config := Config{
+		Certificates: []Certificate{
+			{
+				Certificate: [][]byte{fromHex(certExampleCom)},
+			},
+			{
+				Certificate: [][]byte{fromHex(certWildcardExampleCom)},
+			},
+			{
+				Certificate: [][]byte{fromHex(certFooExampleCom)},
+			},
+		},
+	}
+
+	config.BuildNameToCertificate()
+
+	pointerToIndex := func(c *Certificate) int {
+		for i := range config.Certificates {
+			if c == &config.Certificates[i] {
+				return i
+			}
+		}
+		return -1
+	}
+
+	certificateForName := func(name string) *Certificate {
+		clientHello := &ClientHelloInfo{
+			ServerName: name,
+		}
+		if cert, err := config.getCertificate(clientHello); err != nil {
+			t.Errorf("unable to get certificate for name '%s': %s", name, err)
+			return nil
+		} else {
+			return cert
+		}
+	}
+
+	if n := pointerToIndex(certificateForName("example.com")); n != 0 {
+		t.Errorf("example.com returned certificate %d, not 0", n)
+	}
+	if n := pointerToIndex(certificateForName("bar.example.com")); n != 1 {
+		t.Errorf("bar.example.com returned certificate %d, not 1", n)
+	}
+	if n := pointerToIndex(certificateForName("foo.example.com")); n != 2 {
+		t.Errorf("foo.example.com returned certificate %d, not 2", n)
+	}
+	if n := pointerToIndex(certificateForName("foo.bar.example.com")); n != 0 {
+		t.Errorf("foo.bar.example.com returned certificate %d, not 0", n)
+	}
+}
+
+// Run with multiple crypto configs to test the logic for computing TLS record overheads.
+func runDynamicRecordSizingTest(t *testing.T, config *Config) {
+	clientConn, serverConn := localPipe(t)
+
+	serverConfig := config.Clone()
+	serverConfig.DynamicRecordSizingDisabled = false
+	tlsConn := Server(serverConn, serverConfig)
+
+	handshakeDone := make(chan struct{})
+	recordSizesChan := make(chan []int, 1)
+	defer func() { <-recordSizesChan }() // wait for the goroutine to exit
+	go func() {
+		// This goroutine performs a TLS handshake over clientConn and
+		// then reads TLS records until EOF. It writes a slice that
+		// contains all the record sizes to recordSizesChan.
+		defer close(recordSizesChan)
+		defer clientConn.Close()
+
+		tlsConn := Client(clientConn, config)
+		if err := tlsConn.Handshake(); err != nil {
+			t.Errorf("Error from client handshake: %v", err)
+			return
+		}
+		close(handshakeDone)
+
+		var recordHeader [recordHeaderLen]byte
+		var record []byte
+		var recordSizes []int
+
+		for {
+			n, err := io.ReadFull(clientConn, recordHeader[:])
+			if err == io.EOF {
+				break
+			}
+			if err != nil || n != len(recordHeader) {
+				t.Errorf("io.ReadFull = %d, %v", n, err)
+				return
+			}
+
+			length := int(recordHeader[3])<<8 | int(recordHeader[4])
+			if len(record) < length {
+				record = make([]byte, length)
+			}
+
+			n, err = io.ReadFull(clientConn, record[:length])
+			if err != nil || n != length {
+				t.Errorf("io.ReadFull = %d, %v", n, err)
+				return
+			}
+
+			recordSizes = append(recordSizes, recordHeaderLen+length)
+		}
+
+		recordSizesChan <- recordSizes
+	}()
+
+	if err := tlsConn.Handshake(); err != nil {
+		t.Fatalf("Error from server handshake: %s", err)
+	}
+	<-handshakeDone
+
+	// The server writes these plaintexts in order.
+	plaintext := bytes.Join([][]byte{
+		bytes.Repeat([]byte("x"), recordSizeBoostThreshold),
+		bytes.Repeat([]byte("y"), maxPlaintext*2),
+		bytes.Repeat([]byte("z"), maxPlaintext),
+	}, nil)
+
+	if _, err := tlsConn.Write(plaintext); err != nil {
+		t.Fatalf("Error from server write: %s", err)
+	}
+	if err := tlsConn.Close(); err != nil {
+		t.Fatalf("Error from server close: %s", err)
+	}
+
+	recordSizes := <-recordSizesChan
+	if recordSizes == nil {
+		t.Fatalf("Client encountered an error")
+	}
+
+	// Drop the size of the second to last record, which is likely to be
+	// truncated, and the last record, which is a close_notify alert.
+	recordSizes = recordSizes[:len(recordSizes)-2]
+
+	// recordSizes should contain a series of records smaller than
+	// tcpMSSEstimate followed by some larger than maxPlaintext.
+	seenLargeRecord := false
+	for i, size := range recordSizes {
+		if !seenLargeRecord {
+			if size > (i+1)*tcpMSSEstimate {
+				t.Fatalf("Record #%d has size %d, which is too large too soon", i, size)
+			}
+			if size >= maxPlaintext {
+				seenLargeRecord = true
+			}
+		} else if size <= maxPlaintext {
+			t.Fatalf("Record #%d has size %d but should be full sized", i, size)
+		}
+	}
+
+	if !seenLargeRecord {
+		t.Fatalf("No large records observed")
+	}
+}
+
+func TestDynamicRecordSizingWithStreamCipher(t *testing.T) {
+	config := testConfig.Clone()
+	config.MaxVersion = VersionTLS12
+	config.CipherSuites = []uint16{TLS_RSA_WITH_RC4_128_SHA}
+	runDynamicRecordSizingTest(t, config)
+}
+
+func TestDynamicRecordSizingWithCBC(t *testing.T) {
+	config := testConfig.Clone()
+	config.MaxVersion = VersionTLS12
+	config.CipherSuites = []uint16{TLS_RSA_WITH_AES_256_CBC_SHA}
+	runDynamicRecordSizingTest(t, config)
+}
+
+func TestDynamicRecordSizingWithAEAD(t *testing.T) {
+	config := testConfig.Clone()
+	config.MaxVersion = VersionTLS12
+	config.CipherSuites = []uint16{TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256}
+	runDynamicRecordSizingTest(t, config)
+}
+
+func TestDynamicRecordSizingWithTLSv13(t *testing.T) {
+	config := testConfig.Clone()
+	runDynamicRecordSizingTest(t, config)
+}
+
+// hairpinConn is a net.Conn that makes a “hairpin” call when closed, back into
+// the tls.Conn which is calling it.
+type hairpinConn struct {
+	net.Conn
+	tlsConn *Conn
+}
+
+func (conn *hairpinConn) Close() error {
+	conn.tlsConn.ConnectionState()
+	return nil
+}
+
+func TestHairpinInClose(t *testing.T) {
+	// This tests that the underlying net.Conn can call back into the
+	// tls.Conn when being closed without deadlocking.
+	client, server := localPipe(t)
+	defer server.Close()
+	defer client.Close()
+
+	conn := &hairpinConn{client, nil}
+	tlsConn := Server(conn, &Config{
+		GetCertificate: func(*ClientHelloInfo) (*Certificate, error) {
+			panic("unreachable")
+		},
+	})
+	conn.tlsConn = tlsConn
+
+	// This call should not deadlock.
+	tlsConn.Close()
+}