java如何使用HttpsURLConnection连接到https URL

Question

我试图将一些数据发布到https URL，所以我使用了在http://developer.安卓.com/reference/javax/net/ssl/HttpsURLConnection.html中找到的代码：

                KeyStore keyStore = ...;
                String algorithm = TrustManagerFactory.getDefaultAlgorithm();
                TrustManagerFactory tmf =TrustManagerFactory.getInstance(algorithm);
                tmf.init(keyStore);

                SSLContext context = SSLContext.getInstance("TLS");
                context.init(null, tmf.getTrustManagers(), null);

                // Open a HTTP  connection to  the URL
                conn = (HttpsURLConnection) url.openConnection();
                conn.setSSLSocketFactory(context.getSocketFactory());

问题是，我遇到了这个例外：

    Exception : java.security.cert.CertPathValidatorException: Trust anchor for certification path not found.
    javax.net.ssl.SSLHandshakeException: java.security.cert.CertPathValidatorException: Trust anchor for certification path not found.

额外信息1： 我可以成功地发布到https:地址，而无需从笔记本电脑的终端执行任何额外操作，这是连接详细信息的打印输出：

== Info: Connected to cloud.someserver.com (127.0.0.1) port 443 (#0)
== Info: TLS 1.2 connection using TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
== Info: Server certificate: cloud.someserver.com
== Info: Server certificate: StartCom Class 1 Primary Intermediate Server CA
== Info: Server certificate: StartCom Certification Authority

额外信息2：这是我在执行“openssl s_客户端-connect cloud.myserver.com:80”时从控制台获得的打印输出：

已连接（00000003） 77152:错误：140770FC:SSL例程：SSL23_GET_SERVER_HELLO:未知协议：/BuildRoot/Library/Caches/com。苹果xbs/Sources/OpenSSL098/OpenSSL098-59/src/ssl/s23_clnt。c:618: Joshs MacBook Pro:~JoshDBS$openssl s_客户端-连接云。我的服务器。通讯：8080 连接：连接被拒绝 连接：errno=61 Joshs MacBook Pro:~JoshDBS$openssl s_客户端-连接云。我的服务器。com:81 连接：连接被拒绝 连接：errno=61 Joshs MacBook Pro:~JoshDBS$openssl s_客户端-连接云。我的服务器。com:80

CONNECTED(00000003)
77155:error:140770FC:SSL routines:SSL23_GET_SERVER_HELLO:unknown protocol:/BuildRoot/Library/Caches/com.apple.xbs/Sources/OpenSSL098/OpenSSL098-59/src/ssl/s23_clnt.c:618:
Joshs-MacBook-Pro:~ JoshDBS$ openssl s_client -connect cloud.myserver.com:443
CONNECTED(00000003)
depth=0 /C=ES/CN=cloud.myserver.com/emailAddress=postmaster@myserver.com
verify error:num=20:unable to get local issuer certificate
verify return:1
depth=0 /C=ES/CN=cloud.myserver.com/emailAddress=postmaster@myserver.com
verify error:num=27:certificate not trusted
verify return:1
depth=0 /C=ES/CN=cloud.myserver.com/emailAddress=postmaster@myserver.com
verify error:num=21:unable to verify the first certificate
verify return:1
---
Certificate chain
 0 s:/C=ES/CN=cloud.myserver.com/emailAddress=postmaster@myserver.com
   i:/C=IL/O=StartCom Ltd./OU=Secure Digital Certificate Signing/CN=StartCom Class 1 Primary Intermediate Server CA
---
Server certificate
-----BEGIN CERTIFICATE-----
MIIGQTCCBSmgAwIBAgIHBcg1dAivUzANBgkqhkiG9w0BAQsFADCBjDELMAkGA1UE
(Lots of alphanumeric characters here)
-----END CERTIFICATE-----
subject=/C=ES/CN=cloud.myserver.com/emailAddress=postmaster@myserver.com
issuer=/C=IL/O=StartCom Ltd./OU=Secure Digital Certificate Signing/CN=StartCom Class 1 Primary Intermediate Server CA
---
No client certificate CA names sent
---
SSL handshake has read 2304 bytes and written 328 bytes
---
New, TLSv1/SSLv3, Cipher is DHE-RSA-AES256-SHA
Server public key is 2048 bit
Secure Renegotiation IS supported
Compression: NONE
Expansion: NONE
SSL-Session:
    Protocol  : TLSv1
    Cipher    : DHE-RSA-AES256-SHA
    Session-ID: B67EED30382BE22A81F86884646480E967662A1559CA791B1B4DA8F06EDC
    Session-ID-ctx: 
    Master-Key: DE439EC4BEA0AA6E9B15836AD33DB46105D1A27544E0570E8EFF50D3BEF8F0725FC1A34343495D5ADAE192DD09838
    Key-Arg   : None
    Start Time: 1450886131
    Timeout   : 300 (sec)
    Verify return code: 21 (unable to verify the first certificate)
---
closed

我需要为密钥库分配什么值，而不是这三个点（…）我从哪里得到的

如何使用HttpsURLConnection发布数据？（我已经可以发布到简单的http:url）

Answer 1

尝试禁用SSL证书验证as explained here。 建议仅用于开发目的，而不是在生产环境中。在生产环境中，必须安装方便的证书

 TrustManager[] trustAllCerts = new TrustManager[] {
        new X509TrustManager() {
          public java.security.cert.X509Certificate[] getAcceptedIssuers() {
           return null;
          }
          @Override
          public void checkClientTrusted(X509Certificate[] arg0, String arg1)
           throws CertificateException {}

          @Override
          public void checkServerTrusted(X509Certificate[] arg0, String arg1)
            throws CertificateException {}

          }
     };

  SSLContext sc=null;
  try {
   sc = SSLContext.getInstance("SSL");
  } catch (NoSuchAlgorithmException e) {
   e.printStackTrace();
  }
  try {
   sc.init(null, trustAllCerts, new java.security.SecureRandom());
  } catch (KeyManagementException e) {
   e.printStackTrace();
  }
  HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());

  // Create all-trusting host name verifier
  HostnameVerifier validHosts = new HostnameVerifier() {
  @Override
  public boolean verify(String arg0, SSLSession arg1) {
   return true;
  }
  };
  // All hosts will be valid
  HttpsURLConnection.setDefaultHostnameVerifier(validHosts);

Answer 2

尝试以下方法：

String keyStoreType = KeyStore.getDefaultType();
KeyStore keyStore = KeyStore.getInstance(keyStoreType);

另外，你想访问哪个URL？它可能不在Android的可信证书数据存储中，这意味着您需要自己做更多的工作才能将证书添加到数据存储中

如果您仍然卡住，请告诉我，我们将进一步调试您的问题