我到处找过,问了很多人,但到目前为止没有人能帮我。我试图通过Java (8)应用程序从我的windows (7)膝上型计算机连接到远程计算机上的postgres (9.6)数据库。我们使用Kerberos来确保访问的安全,但是我有一个有效的Kerberos帐户,并且可以通过de票证管理器创建票证。我还可以登录到其他需要Kerberos身份验证的“服务”,尽管不是通过java,而是通过浏览器。
但是无论我尝试什么,我都不能让我的java程序工作。我要说的是:
krb5.ini
[libdefaults]
default_realm = <domain>
forwardable = true
kdc_timesync = 1
ccache_type = 4
proxiable = true
dns_lookup_kdc = true
dns_lookup_realm = true
[realms]
<domain>.NET = {
admin_server = <domain-server>
default_domain = <domain>
}
[domain_realm]
.<domain> = <domain>
<domain> = <domain>
.local.nl.<company>.com = <domain>
local.nl.<company>.com = <domain>
[login]
krb4_convert = true
krb4_get_tickets = falsejaas.conf:
pgjdbc {
com.sun.security.auth.module.Krb5LoginModule required
refreshKrb5Config=true
doNotPrompt=false
useTicketCache=false
renewTGT=false
useKeyTab=true
keyTab="<location>/<filename>.keytab"
debug=true
client=true
principal="<username>@<domain>";
};.keytab文件
public class KerberosPostgresClient {
static {
System.setProperty("java.security.krb5.conf","c:/tmp/krb5.ini");
System.setProperty("java.security.krb5.realm","<domain>");
System.setProperty("java.security.krb5.kdc","<domain>");
System.setProperty("javax.security.auth.useSubjectCredsOnly","false");
System.setProperty("java.security.auth.login.config","c:/tmp/jaas.conf"); }
@Test
public void test() throws Exception {
String url = "jdbc:postgresql://<hostname>:<port>/<database>";
Properties properties = new Properties();
properties.setProperty("JAASConfigName", "pgjdbc");
try (Connection conn = DriverManager.getConnection(url, connInfo)) {
conn.createStatement();
} catch (Exception e) {
e.printStackTrace();
}
}
}非常简单的java代码可以找到keytab,jaas.conf。我在另一台机器上创建了keytab文件,但使用的是相同的主体和密码。
当我运行程序时,我看到:
Debug is true storeKey false useTicketCache false useKeyTab true doNotPrompt false ticketCache is null isInitiator true KeyTab is c:/tmp/<username>.keytab refreshKrb5Config is true principal is <username>@<domain> tryFirstPass is false useFirstPass is false storePass is false clearPass is false
Refreshing Kerberos configuration过了一会儿,我得到了一个例外:
[Krb5LoginModule] authentication failed
Receive timed out
org.postgresql.util.PSQLException: GSS Authentication failed
at org.postgresql.gss.MakeGSS.authenticate(MakeGSS.java:65)
....
Caused by: java.net.SocketTimeoutException: Receive timed out
at java.net.DualStackPlainDatagramSocketImpl.socketReceiveOrPeekData(Native Method)
at java.net.DualStackPlainDatagramSocketImpl.receive0(DualStackPlainDatagramSocketImpl.java:120)
at java.net.AbstractPlainDatagramSocketImpl.receive(AbstractPlainDatagramSocketImpl.java:144)
at java.net.DatagramSocket.receive(DatagramSocket.java:812)
at sun.security.krb5.internal.UDPClient.receive(NetClient.java:206)
at sun.security.krb5.KdcComm$KdcCommunication.run(KdcComm.java:411)
at sun.security.krb5.KdcComm$KdcCommunication.run(KdcComm.java:364)
at java.security.AccessController.doPrivileged(Native Method)
at sun.security.krb5.KdcComm.send(KdcComm.java:348)
at sun.security.krb5.KdcComm.sendIfPossible(KdcComm.java:253)
at sun.security.krb5.KdcComm.send(KdcComm.java:229)
at sun.security.krb5.KdcComm.send(KdcComm.java:200)
at sun.security.krb5.KrbAsReqBuilder.send(KrbAsReqBuilder.java:316)
at sun.security.krb5.KrbAsReqBuilder.action(KrbAsReqBuilder.java:361)
at com.sun.security.auth.module.Krb5LoginModule.attemptAuthentication(Krb5LoginModule.java:776)
... 45 more我曾经得到其他的异常,这表明它找不到keytab文件,但是有了上面的设置,它似乎可以工作。我也可以在我的机器上打开postgres数据库。
我发现:Error connecting to PostgreSQL 9.4 with MIT Kerberos via JDBC vs CLI但没有解决方案
发布于 2017-09-25 07:28:37
我终于让它在我的jaas.conf中使用以下设置:
pgjdbc {
com.sun.security.auth.module.Krb5LoginModule required
refreshKrb5Config=true
doNotPrompt=true
useTicketCache=true
renewTGT=true
useKeyTab=true
keyTab="c:/<locationto>/<user>.keytab"
debug=true
client=true
principal="<user>@<domain>";
};即doNotPrompt、useTicketCache、renewTGT三者的结合,最终使其发挥作用。
https://stackoverflow.com/questions/46370374
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