如何在Java中使用LDAP身份验证进行Exchange Web服务连接？

我尝试编写一个访问Exchange Web服务的 Java应用程序,以便阅读电子邮件.因此,我使用Microsoft提供的Exchange Web服务(EWS)Java API.

I already had several issues with it,我终于发现应该使用LDAP完成身份验证.不幸的是,我不知道怎么做这样的事情. EWS API是否允许配置连接到Exchange服务器时要使用的身份验证方案？如果是,如何配置？

这是我用于连接的代码,但它使用默认的身份验证方案,即NTLM：

String url = "https//my-server/EWS/exchange.asmx";
ExchangeService service = new ExchangeService(ExchangeVersion.Exchange2007_SP1);
service.setTraceEnabled(true);
service.setCredentials(new WebCredentials("user","password"));
service.setUrl(url.toURI());

Mailbox mailbox = new Mailbox("foo@bar.com");
FolderId folder = new FolderId(WellKnownFolderName.Inbox,mailbox);
ItemView view = new ItemView(10);
view.getOrderBy().add(ItemSchema.DateTimeReceived,SortDirection.Descending);
FindItemsResults<Item> items = service.findItems(folder,view);

解决方法

在Microsft EWS API中,类NTLM是错误的.所以我们用类的以下代码重新构建了JAR：

private class NTLM {
    /** Character encoding */
    public static final String DEFAULT_CHARSET = "ASCII";

    /**
    * The character was used by 3.x's NTLM to encode the username and
    * password. Apparently,this is not needed in when passing username,* password from NTCredentials to the JCIFS library
    */
    private String credentialCharset = DEFAULT_CHARSET;

    void setCredentialCharset(String credentialCharset) {
           this.credentialCharset = credentialCharset;
    }

    private static final int TYPE_1_FLAGS = NtlmFlags.NTLMSSP_NEGOTIATE_NTLM
                 | NtlmFlags.NTLMSSP_NEGOTIATE_UNICODE
                 | NtlmFlags.NTLMSSP_NEGOTIATE_NTLM2;

    private String generateType1Msg(String host,String domain) {
           jcifs.ntlmssp.Type1Message t1m = new jcifs.ntlmssp.Type1Message(
                        TYPE_1_FLAGS,domain,host);
           return jcifs.util.Base64.encode(t1m.toByteArray());
    }

    private String generateType3Msg(String username,String password,String host,String domain,String challenge) {
           jcifs.ntlmssp.Type2Message t2m;
           try {
                 t2m = new jcifs.ntlmssp.Type2Message(
                               jcifs.util.Base64.decode(challenge));
           } catch (IOException e) {
                 throw new RuntimeException("Invalid Type2 message",e);
           }

           final int type2Flags = t2m.getFlags();
           final int type3Flags = type2Flags
                        & (0xffffffff ^ (NtlmFlags.NTLMSSP_TARGET_TYPE_DOMAIN | NtlmFlags.NTLMSSP_TARGET_TYPE_SERVER));

           jcifs.ntlmssp.Type3Message t3m = new jcifs.ntlmssp.Type3Message(
                        t2m,password,username,host,type3Flags);
           return jcifs.util.Base64.encode(t3m.toByteArray());
    }
}

另一种解决方案是使用JWebServices库(商业).

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