Fuzzing: Add new mysql fuzzer

go/mysql/mysql_fuzzer.go

@@ -18,13 +18,19 @@ limitations under the License.
 package mysql
 
 import (
+	"context"
 	"fmt"
+	"io/ioutil"
 	"net"
+	"os"
+	"path"
 	"sync"
 	"time"
 
 	"vitess.io/vitess/go/sqltypes"
 	querypb "vitess.io/vitess/go/vt/proto/query"
+	"vitess.io/vitess/go/vt/tlstest"
+	"vitess.io/vitess/go/vt/vttls"
 )
 
 func createFuzzingSocketPair() (net.Listener, *Conn, *Conn) {
@@ -216,3 +222,135 @@ func FuzzReadQueryResults(data []byte) int {
 	}
 	return 1
 }
+
+type fuzzTestHandler struct {
+	mu       sync.Mutex
+	lastConn *Conn
+	result   *sqltypes.Result
+	err      error
+	warnings uint16
+}
+
+func (th *fuzzTestHandler) LastConn() *Conn {
+	th.mu.Lock()
+	defer th.mu.Unlock()
+	return th.lastConn
+}
+
+func (th *fuzzTestHandler) Result() *sqltypes.Result {
+	th.mu.Lock()
+	defer th.mu.Unlock()
+	return th.result
+}
+
+func (th *fuzzTestHandler) SetErr(err error) {
+	th.mu.Lock()
+	defer th.mu.Unlock()
+	th.err = err
+}
+
+func (th *fuzzTestHandler) Err() error {
+	th.mu.Lock()
+	defer th.mu.Unlock()
+	return th.err
+}
+
+func (th *fuzzTestHandler) SetWarnings(count uint16) {
+	th.mu.Lock()
+	defer th.mu.Unlock()
+	th.warnings = count
+}
+
+func (th *fuzzTestHandler) NewConnection(c *Conn) {
+	th.mu.Lock()
+	defer th.mu.Unlock()
+	th.lastConn = c
+}
+
+func (th *fuzzTestHandler) ConnectionClosed(_ *Conn) {
+}
+
+func (th *fuzzTestHandler) ComQuery(c *Conn, query string, callback func(*sqltypes.Result) error) error {
+
+	return nil
+}
+
+func (th *fuzzTestHandler) ComPrepare(c *Conn, query string, bindVars map[string]*querypb.BindVariable) ([]*querypb.Field, error) {
+	return nil, nil
+}
+
+func (th *fuzzTestHandler) ComStmtExecute(c *Conn, prepare *PrepareData, callback func(*sqltypes.Result) error) error {
+	return nil
+}
+
+func (th *fuzzTestHandler) ComResetConnection(c *Conn) {
+
+}
+
+func (th *fuzzTestHandler) WarningCount(c *Conn) uint16 {
+	th.mu.Lock()
+	defer th.mu.Unlock()
+	return th.warnings
+}
+
+func FuzzTLSServer(data []byte) int {
+	th := &fuzzTestHandler{}
+
+	authServer := NewAuthServerStatic("", "", 0)
+	authServer.entries["user1"] = []*AuthServerStaticEntry{{
+		Password: "password1",
+	}}
+	defer authServer.close()
+	l, err := NewListener("tcp", ":0", authServer, th, 0, 0, false)
+	if err != nil {
+		return -1
+	}
+	defer l.Close()
+	host, err := os.Hostname()
+	if err != nil {
+		return -1
+	}
+	port := l.Addr().(*net.TCPAddr).Port
+	root, err := ioutil.TempDir("", "TestTLSServer")
+	if err != nil {
+		return -1
+	}
+	defer os.RemoveAll(root)
+	tlstest.CreateCA(root)
+	tlstest.CreateSignedCert(root, tlstest.CA, "01", "server", host)
+	tlstest.CreateSignedCert(root, tlstest.CA, "02", "client", "Client Cert")
+
+	serverConfig, err := vttls.ServerConfig(
+		path.Join(root, "server-cert.pem"),
+		path.Join(root, "server-key.pem"),
+		path.Join(root, "ca-cert.pem"),
+		"")
+	if err != nil {
+		return -1
+	}
+	l.TLSConfig.Store(serverConfig)
+	go l.Accept()
+
+	connCountByTLSVer.ResetAll()
+	// Setup the right parameters.
+	params := &ConnParams{
+		Host:  host,
+		Port:  port,
+		Uname: "user1",
+		Pass:  "password1",
+		// SSL flags.
+		Flags:   CapabilityClientSSL,
+		SslCa:   path.Join(root, "ca-cert.pem"),
+		SslCert: path.Join(root, "client-cert.pem"),
+		SslKey:  path.Join(root, "client-key.pem"),
+	}
+	conn, err := Connect(context.Background(), params)
+	if err != nil {
+		return -1
+	}
+	_, err = conn.ExecuteFetch(string(data), 1000, true)
+	if err != nil {
+		return 0
+	}
+	return 1
+}