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，所以我使用了我在 http://developer.android.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，我遇到了这个异常:

    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，而无需从我的笔记本电脑的终端做任何额外的事情，这是详细连接的打印输出:

== 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_client -connect cloud.myserver.com:80”时从控制台获得的打印输出:

连接(00000003)77152:错误:140770FC:SSL例程:SSL23_GET_SERVER_HELLO:未知协议(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:8080连接:连接被拒绝连接:错误号=61Joshs-MacBook-Pro:~ JoshDBS$ openssl s_client -connect cloud.myserver.com:81连接:连接被拒绝连接:错误号=61Joshs-MacBook-Pro:~ JoshDBS$ openssl s_client -connect cloud.myserver.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 keystore 分配什么值而不是那三个点 (...)，我从哪里得到它？

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

Answer 1

尝试以下操作:

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

此外，您要访问哪个 URL？它可能不在 Android 的受信任证书的 DataStore 中，这意味着您必须自己做更多的工作才能将证书添加到 DataStore。

如果您仍然卡住，请告诉我，我们将进一步调试您的问题。