java - 如何配置“imaps”来接收邮件？ JavaMail

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7年前关闭。





如何配置Java应用程序以将993端口与TLS结合使用，以从IMAP邮箱中读取邮件。

我将邮件服务器的证书存储在默认的javakeystore cacerts中。
尝试连接到邮箱后。我得到了这个堆栈跟踪（完整的跟踪）：

 javax.mail.MessagingException: java.lang.RuntimeException: Unexpected error: java.security.InvalidAlgorithmParameterException: the trustAnchors parameter must be non-empty;
 nested exception is:
    javax.net.ssl.SSLException: java.lang.RuntimeException: Unexpected error: java.security.InvalidAlgorithmParameterException: the trustAnchors parameter must be non-empty
    at com.sun.mail.imap.IMAPStore.protocolConnect(IMAPStore.java:670)
    at javax.mail.Service.connect(Service.java:317)
    at javax.mail.Service.connect(Service.java:176)
    at javax.mail.Service.connect(Service.java:125)
    at imap.IMAP.receive(IMAP.java:77)
    at imap.IMAP.main(IMAP.java:46)
 Caused by: javax.net.ssl.SSLException: java.lang.RuntimeException: Unexpected error: java.security.InvalidAlgorithmParameterException: the trustAnchors parameter must be non-empty
    at com.sun.net.ssl.internal.ssl.Alerts.getSSLException(Alerts.java:190)
    at com.sun.net.ssl.internal.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1764)
    at com.sun.net.ssl.internal.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1725)
    at com.sun.net.ssl.internal.ssl.SSLSocketImpl.handleException(SSLSocketImpl.java:1708)
    at com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1237)
    at com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1214)
    at com.sun.mail.util.SocketFetcher.configureSSLSocket(SocketFetcher.java:548)
    at com.sun.mail.util.SocketFetcher.createSocket(SocketFetcher.java:352)
    at com.sun.mail.util.SocketFetcher.getSocket(SocketFetcher.java:207)
    at com.sun.mail.iap.Protocol.<init>(Protocol.java:113)
    at com.sun.mail.imap.protocol.IMAPProtocol.<init>(IMAPProtocol.java:111)
    at com.sun.mail.imap.IMAPStore.protocolConnect(IMAPStore.java:637)
    ... 5 more
Caused by: java.lang.RuntimeException: Unexpected error: java.security.InvalidAlgorithmParameterException: the trustAnchors parameter must be non-empty
    at sun.security.validator.PKIXValidator.<init>(PKIXValidator.java:57)
    at sun.security.validator.Validator.getInstance(Validator.java:161)
    at com.sun.net.ssl.internal.ssl.X509TrustManagerImpl.getValidator(X509TrustManagerImpl.java:108)
    at com.sun.net.ssl.internal.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:204)
    at com.sun.net.ssl.internal.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:249)
    at com.sun.net.ssl.internal.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1185)
    at com.sun.net.ssl.internal.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:136)
    at com.sun.net.ssl.internal.ssl.Handshaker.processLoop(Handshaker.java:593)
    at com.sun.net.ssl.internal.ssl.Handshaker.process_record(Handshaker.java:529)
    at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:958)
    at com.sun.net.ssl.internal.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1203)
    at com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1230)
    ... 12 more
Caused by: java.security.InvalidAlgorithmParameterException: the trustAnchors parameter must be non-empty
    at java.security.cert.PKIXParameters.setTrustAnchors(PKIXParameters.java:183)
    at java.security.cert.PKIXParameters.<init>(PKIXParameters.java:103)
    at java.security.cert.PKIXBuilderParameters.<init>(PKIXBuilderParameters.java:87)
    at sun.security.validator.PKIXValidator.<init>(PKIXValidator.java:55)
    ... 23 more
15.03.2013 13:54:50 imap.IMAP main
SCHWERWIEGEND: null
java.lang.NullPointerException
    at imap.IMAP.receive(IMAP.java:123)
    at imap.IMAP.main(IMAP.java:46)

这是我的比例：

System.setProperty("javax.net.ssl.trustStore", "/usr/java/jdk_1.6.0_35/jre/lib/security/cacerts");
System.setProperty("javax.net.ssl.trustStorePassword", "changeit");

Properties props = System.getProperties();

props.setProperty("mail.imaps.host", server);
props.setProperty("mail.imaps.user", user);
props.setProperty("mail.imaps.password", password);
props.setProperty("mail.imaps.auth", "true");
props.setProperty("mail.imaps.starttls.enable", "true");
props.setProperty("mail.imaps.socketFactory.port", "993");
props.setProperty("mail.imaps.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
props.setProperty("mail.imaps.socketFactory.fallback", "false");

MailAuthenticator auth = new MailAuthenticator(user, password);

Session session = Session.getDefaultInstance(props, auth);

store = session.getStore("imaps");
store.connect();

缺少什么吗？互联网上有很多关于此问题的文章。但是大多数是用于SMTP。我还没有找到真正可以解释的东西，要使此案例正常工作，您真正需要哪些属性。

我希望有人可以帮助我找到我的错误。

非常感谢。

最佳答案

首先是一些注释，这些注释不是造成问题的原因，但是可以简化程序。

摆脱socketFactory属性，您不需要它们。

使用Session.getInstance代替Session.getDefaultInstance。

摆脱MailAuthenticator并调用store.connect（用户，密码）。

有关详细信息，请参见JavaMail FAQ。

至于您得到的例外情况，这似乎是与您的证书或信任库有关的问题。 This JavaMail FAQ entry具有调试此类问题的提示的指针。您可能需要Java SSL /网络/安全专家来解释问题所在。

您说您已经将证书添加到信任库中，但是以防万一您可能想检查this JavaMail FAQ entry。

关于java - 如何配置“imaps”来接收邮件？ JavaMail ，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/15433992/