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[JENKINS-55813] Improve analysis of the AD attributes #34
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| /* | ||
| * The MIT License | ||
| * | ||
| * Copyright (c) 2019, CloudBees, Inc. | ||
| * | ||
| * Permission is hereby granted, free of charge, to any person obtaining a copy | ||
| * of this software and associated documentation files (the "Software"), to deal | ||
| * in the Software without restriction, including without limitation the rights | ||
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
| * copies of the Software, and to permit persons to whom the Software is | ||
| * furnished to do so, subject to the following conditions: | ||
| * | ||
| * The above copyright notice and this permission notice shall be included in | ||
| * all copies or substantial portions of the Software. | ||
| * | ||
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | ||
| * THE SOFTWARE. | ||
| */ | ||
| package hudson.security; | ||
|
|
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| import org.kohsuke.accmod.Restricted; | ||
| import org.kohsuke.accmod.restrictions.NoExternalUse; | ||
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|
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| import javax.annotation.CheckForNull; | ||
| import javax.annotation.Nonnull; | ||
| import javax.naming.NamingException; | ||
| import javax.naming.directory.Attribute; | ||
| import javax.naming.directory.Attributes; | ||
| import java.util.Calendar; | ||
| import java.util.Date; | ||
| import java.util.GregorianCalendar; | ||
| import java.util.concurrent.TimeUnit; | ||
|
|
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| /** | ||
| * Ease all the computations required to determine the user account optional attributes for creating | ||
| * the UserDetails that will be used by the SecurityRealm | ||
| */ | ||
| @Restricted(NoExternalUse.class) | ||
| public class UserAttributesHelper { | ||
| // https://support.microsoft.com/en-us/help/305144/how-to-use-the-useraccountcontrol-flags-to-manipulate-user-account-pro | ||
| private static final String ATTR_USER_ACCOUNT_CONTROL = "userAccountControl"; | ||
| private static final String ATTR_ACCOUNT_EXPIRES = "accountExpires"; | ||
| // for Windows Server 2003-based domain | ||
| private static final String ATTR_USER_ACCOUNT_CONTROL_COMPUTED = "msDS-User-Account-Control-Computed"; | ||
| // for ADAM (Active Directory Application Mode), replace the ADS_UF_DISABLED | ||
| private static final String ATTR_USER_ACCOUNT_DISABLED = "msDS-UserAccountDisabled"; | ||
| // for ADAM, replace the ADS_UF_PASSWORD_EXPIRED | ||
| private static final String ATTR_USER_PASSWORD_EXPIRED = "msDS-UserPasswordExpired"; | ||
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| // https://docs.microsoft.com/en-us/windows/desktop/adschema/a-accountexpires | ||
| // constant names follow the code in Iads.h | ||
| private static final long ACCOUNT_NO_EXPIRATION = 0x7FFF_FFFF_FFFF_FFFFL; | ||
| private static final int ADS_UF_DISABLED = 0x0002; | ||
| private static final int ADS_UF_LOCK_OUT = 0x0010; | ||
| private static final int ADS_UF_PASSWORD_EXPIRED = 0x80_0000; | ||
|
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| public static boolean checkIfUserIsEnabled(@Nonnull Attributes user) { | ||
| try { | ||
| String userAccountControl = getStringAttribute(user, ATTR_USER_ACCOUNT_CONTROL); | ||
| if (userAccountControl != null) { | ||
| int uacAsInt = Integer.parseInt(userAccountControl); | ||
| if ((uacAsInt & ADS_UF_DISABLED) == ADS_UF_DISABLED) { | ||
| return false; | ||
| } | ||
| } | ||
|
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| String adamUserAccountDisabled = getStringAttribute(user, ATTR_USER_ACCOUNT_DISABLED); | ||
| if (adamUserAccountDisabled != null) { | ||
| if (adamUserAccountDisabled.equals("true")) { | ||
| return false; | ||
| } else { | ||
| return true; | ||
| } | ||
| } | ||
|
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| return true; | ||
| } catch (NamingException e) { | ||
| return true; | ||
| } | ||
| } | ||
|
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| public static boolean checkIfAccountNonExpired(@Nonnull Attributes user) { | ||
| try { | ||
| String accountExpirationDate = getStringAttribute(user, ATTR_ACCOUNT_EXPIRES); | ||
| if (accountExpirationDate != null) { | ||
| long expirationAsLong = Long.parseLong(accountExpirationDate); | ||
| if (expirationAsLong == 0L || expirationAsLong == ACCOUNT_NO_EXPIRATION) { | ||
| return true; | ||
| } | ||
|
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| long nowIn100NsFromJan1601 = getWin32EpochHundredNanos(); | ||
| boolean expired = expirationAsLong < nowIn100NsFromJan1601; | ||
| return !expired; | ||
| } | ||
|
|
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| return true; | ||
| } catch (NamingException e) { | ||
| return true; | ||
| } | ||
| } | ||
|
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| // documentation: https://docs.microsoft.com/en-us/windows/desktop/adschema/a-accountexpires | ||
| // code inspired by https://community.oracle.com/thread/1157460 | ||
| private static long getWin32EpochHundredNanos() { | ||
| GregorianCalendar win32Epoch = new GregorianCalendar(1601, Calendar.JANUARY, 1); | ||
|
Member
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Author
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If anybody else agree on your proposal I will change ;)
Member
There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. My proposal was taking a random java.time class that sounded appropriate. Calendar is much more annoying to use. |
||
| Date win32EpochDate = win32Epoch.getTime(); | ||
| // note that 1/1/1601 will be returned as a negative value by Java | ||
| GregorianCalendar today = new GregorianCalendar(); | ||
| Date todayDate = today.getTime(); | ||
| long timeSinceWin32EpochInMs = todayDate.getTime() - win32EpochDate.getTime(); | ||
| // milliseconds to microseconds => x1000 | ||
| long timeSinceWin32EpochInNs = TimeUnit.NANOSECONDS.convert(timeSinceWin32EpochInMs, TimeUnit.MILLISECONDS); | ||
| // but we need in 100 ns, as 1000 ns = 1 micro, add a x10 factor | ||
| return timeSinceWin32EpochInNs * 100; | ||
| } | ||
|
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| public static boolean checkIfCredentialsAreNonExpired(@Nonnull Attributes user) { | ||
| try { | ||
| String userAccountControl = getStringAttribute(user, ATTR_USER_ACCOUNT_CONTROL); | ||
| if (userAccountControl != null) { | ||
| int uacAsInt = Integer.parseInt(userAccountControl); | ||
| if ((uacAsInt & ADS_UF_PASSWORD_EXPIRED) == ADS_UF_PASSWORD_EXPIRED) { | ||
| return false; | ||
| } | ||
| } | ||
|
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| String userAccountControlComputed = getStringAttribute(user, ATTR_USER_ACCOUNT_CONTROL_COMPUTED); | ||
| if (userAccountControlComputed != null) { | ||
| int uacAsInt = Integer.parseInt(userAccountControlComputed); | ||
| if ((uacAsInt & ADS_UF_PASSWORD_EXPIRED) == ADS_UF_PASSWORD_EXPIRED) { | ||
| return false; | ||
| } | ||
| } | ||
|
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| String adamUserPasswordExpired = getStringAttribute(user, ATTR_USER_PASSWORD_EXPIRED); | ||
| if (adamUserPasswordExpired != null) { | ||
| if (adamUserPasswordExpired.equals("true")) { | ||
| return false; | ||
| } else { | ||
| return true; | ||
| } | ||
| } | ||
|
|
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| return true; | ||
| } catch (NamingException e) { | ||
| return true; | ||
| } | ||
| } | ||
|
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| public static boolean checkIfAccountNonLocked(@Nonnull Attributes user) { | ||
| try { | ||
| String userAccountControl = getStringAttribute(user, ATTR_USER_ACCOUNT_CONTROL); | ||
| if (userAccountControl != null) { | ||
| int uacAsInt = Integer.parseInt(userAccountControl); | ||
| if ((uacAsInt & ADS_UF_LOCK_OUT) == ADS_UF_LOCK_OUT) { | ||
| return false; | ||
| } | ||
| } | ||
|
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| String userAccountControlComputed = getStringAttribute(user, ATTR_USER_ACCOUNT_CONTROL_COMPUTED); | ||
| if (userAccountControlComputed != null) { | ||
| int uacAsInt = Integer.parseInt(userAccountControlComputed); | ||
| if ((uacAsInt & ADS_UF_LOCK_OUT) == ADS_UF_LOCK_OUT) { | ||
| return false; | ||
| } | ||
| } | ||
|
|
||
| return true; | ||
| } catch (NamingException e) { | ||
| return true; | ||
| } | ||
| } | ||
|
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| private static @CheckForNull String getStringAttribute(@Nonnull Attributes user, @Nonnull String name) throws NamingException { | ||
| Attribute a = user.get(name); | ||
| if (a == null) { | ||
| return null; | ||
| } | ||
| Object v = a.get(); | ||
| if (v == null) { | ||
| return null; | ||
| } | ||
| return v.toString(); | ||
| } | ||
| } | ||
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