生成SPNEGO令牌失败

Question

我尝试生成可用作header的令牌，以验证HTTP和Oozie REST API URL。我引用了下面的url来生成协商令牌的代码。https://www.ibm.com/support/knowledgecenter/en/SS7JFU_8.5.5/com.ibm.websphere.express.doc/ae/tsec_SPNEGO_token.html

public class TokenCreation {
  private static final String SPNEGO_OID = "1.3.6.1.5.5.2";
  private static final String KERBEROS_OID = "1.2.840.113554.1.2.2";
  public static byte[] genToken(String principal) {
    System.setProperty("javax.security.auth.useSubjectCredsOnly", "false");
    byte[] spnegoToken = new byte[0];
    try {
      Oid spnegoMechOid = new Oid(SPNEGO_OID);
      Oid krb5MechOid = new Oid(KERBEROS_OID);
      GSSCredential clientGssCreds = null;
      GSSManager manager = GSSManager.getInstance();
      GSSName gssUserName = manager.createName(principal, GSSName.NT_USER_NAME, krb5MechOid);
      clientGssCreds = manager.createCredential(gssUserName.canonicalize(krb5MechOid),
          GSSCredential.INDEFINITE_LIFETIME,
          krb5MechOid,
          GSSCredential.INITIATE_ONLY);
      clientGssCreds.add(gssUserName,
          GSSCredential.INDEFINITE_LIFETIME,
          GSSCredential.INDEFINITE_LIFETIME,
          spnegoMechOid, GSSCredential.INITIATE_ONLY);
      GSSName gssServerName = manager.createName(principal, GSSName.NT_USER_NAME);
      GSSContext clientContext = manager.createContext(gssServerName.canonicalize(spnegoMechOid),
          spnegoMechOid,
          clientGssCreds,
          GSSContext.DEFAULT_LIFETIME);
      // optional enable GSS credential delegation
      clientContext.requestCredDeleg(true);
      // create a SPNEGO token for the target server
      spnegoToken = clientContext.initSecContext(spnegoToken, 0, spnegoToken.length);
    } catch (GSSException e) {
      e.printStackTrace();
    }
    return spnegoToken;
  }

但是在运行上面的代码后，我总是得到以下提示：

2019-09-25 14:12:51 760 [INFO] [pool-2-thread-1] c.s.n.c.u.security.KrbUtils - after loginUserFromKeytab............AtoimcUser:HTTP/host1.exmaple.com@EXAMPLE.COM
2019-09-25 14:12:51 760 [INFO] [pool-2-thread-1] c.s.n.app.oozie.OozieAppCaller - ->>>>>>User Name is HTTP/host1.exmaple.com@EXAMPLE.COM
2019-09-25 14:12:51 760 [INFO] [pool-2-thread-1] c.s.n.app.oozie.OozieAppCaller - ->>>>>>Mode is KERBEROS
>>>KinitOptions cache name is /tmp/krb5cc_0
Kerberos username [root]: ^C^C^C
Kerberos password for root:

您可以在上面的输出日志的末尾看到。总是会提示"Kerberos username“询问用户名。

此外，我还尝试手动运行kinit the keytab。上面的类可以成功地生成令牌。但是手动运行kinit不是我想要的方式。

你能帮我吗？谢谢。

Answer 1

不幸的是，Java中的Kerberos和SPNEGO支持很麻烦。

我已经创建了一个小型库来简化一些Kerberos用例：https://github.com/bedrin/kerb4j您可以像这样使用它来生成SPNEGO令牌：

SpnegoClient spnegoClient = SpnegoClient.loginWithKeyTab("svc_consumer", "/opt/myapp/consumer.keytab");
URL url = new URL("http://api.provider.acme.com/api/operation1");
SpnegoContext context = spnegoClient.createContext("http://provider.acme.com"); // Will result in HTTP/provider.acme.com SPN
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setRequestProperty("Authorization", context.createTokenAsAuthroizationHeader());