Go 带有自签名证书的 TLS

我正在try 使用自签名服务器证书建立TLS连接.

我使用以下示例代码生成了证书:http://golang.org/src/pkg/crypto/tls/generate_cert.go

我的相关客户端代码如下所示:

// server cert is self signed -> server_cert == ca_cert
CA_Pool := x509.NewCertPool()
severCert, err := ioutil.ReadFile("./cert.pem")
if err != nil {
    log.Fatal("Could not load server certificate!")
}
CA_Pool.AppendCertsFromPEM(severCert)

config := tls.Config{RootCAs: CA_Pool}

conn, err := tls.Dial("tcp", "127.0.0.1:8000", &config)
if err != nil {
    log.Fatalf("client: dial: %s", err)
}

以及相关的服务器代码，如下所示:

cert, err := tls.LoadX509KeyPair("./cert.pem", "./key.pem")
config := tls.Config{Certificates: []tls.Certificate{cert}}
listener, err := tls.Listen("tcp", "127.0.0.1:8000", &config)

for {
    conn, err := listener.Accept()
    if err != nil {
        log.Printf("server: accept: %s", err)
        break
    }
    log.Printf("server: accepted from %s", conn.RemoteAddr())
    go handleConnection(conn)
}

因为服务器证书是自签名的，所以对服务器和客户端CA_Pool使用相同的证书，但是这似乎不起作用，因为我总是收到以下错误:

client: dial: x509: certificate signed by unknown authority 
(possibly because of "x509: invalid signature: parent certificate
cannot sign this kind of certificate" while trying to verify 
candidate authority certificate "serial:0")

我犯了什么错误？