| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| */ |
| package org.apache.directory.shared.kerberos; |
| |
| |
| import static org.apache.directory.shared.kerberos.codec.types.EncryptionType.DES3_CBC_MD5; |
| import static org.apache.directory.shared.kerberos.codec.types.EncryptionType.DES3_CBC_SHA1; |
| import static org.apache.directory.shared.kerberos.codec.types.EncryptionType.DES3_CBC_SHA1_KD; |
| import static org.apache.directory.shared.kerberos.codec.types.EncryptionType.DES_CBC_CRC; |
| import static org.apache.directory.shared.kerberos.codec.types.EncryptionType.DES_CBC_MD4; |
| import static org.apache.directory.shared.kerberos.codec.types.EncryptionType.DES_CBC_MD5; |
| import static org.apache.directory.shared.kerberos.codec.types.EncryptionType.DES_EDE3_CBC_ENV_OID; |
| import static org.apache.directory.shared.kerberos.codec.types.EncryptionType.DSAWITHSHA1_CMSOID; |
| import static org.apache.directory.shared.kerberos.codec.types.EncryptionType.MD5WITHRSAENCRYPTION_CMSOID; |
| import static org.apache.directory.shared.kerberos.codec.types.EncryptionType.RC2CBC_ENVOID; |
| import static org.apache.directory.shared.kerberos.codec.types.EncryptionType.RC4_HMAC; |
| import static org.apache.directory.shared.kerberos.codec.types.EncryptionType.RSAENCRYPTION_ENVOID; |
| import static org.apache.directory.shared.kerberos.codec.types.EncryptionType.RSAES_OAEP_ENV_OID; |
| import static org.apache.directory.shared.kerberos.codec.types.EncryptionType.SHA1WITHRSAENCRYPTION_CMSOID; |
| |
| import java.net.InetAddress; |
| import java.text.ParseException; |
| import java.text.SimpleDateFormat; |
| import java.util.ArrayList; |
| import java.util.HashSet; |
| import java.util.LinkedHashMap; |
| import java.util.LinkedHashSet; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Set; |
| import java.util.TimeZone; |
| |
| import javax.security.auth.kerberos.KerberosPrincipal; |
| |
| import org.apache.directory.api.util.Strings; |
| import org.apache.directory.server.i18n.I18n; |
| import org.apache.directory.server.kerberos.protocol.codec.KerberosDecoder; |
| import org.apache.directory.server.kerberos.shared.crypto.encryption.CipherTextHandler; |
| import org.apache.directory.server.kerberos.shared.crypto.encryption.KeyUsage; |
| import org.apache.directory.server.kerberos.shared.replay.ReplayCache; |
| import org.apache.directory.server.kerberos.shared.store.PrincipalStore; |
| import org.apache.directory.server.kerberos.shared.store.PrincipalStoreEntry; |
| import org.apache.directory.shared.kerberos.codec.options.ApOptions; |
| import org.apache.directory.shared.kerberos.codec.types.EncryptionType; |
| import org.apache.directory.shared.kerberos.components.EncTicketPart; |
| import org.apache.directory.shared.kerberos.components.EncryptionKey; |
| import org.apache.directory.shared.kerberos.components.HostAddress; |
| import org.apache.directory.shared.kerberos.components.PrincipalName; |
| import org.apache.directory.shared.kerberos.exceptions.ErrorType; |
| import org.apache.directory.shared.kerberos.exceptions.KerberosException; |
| import org.apache.directory.shared.kerberos.messages.ApReq; |
| import org.apache.directory.shared.kerberos.messages.Authenticator; |
| import org.apache.directory.shared.kerberos.messages.Ticket; |
| |
| |
| /** |
| * An utility class for Kerberos. |
| * |
| * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> |
| */ |
| public class KerberosUtils |
| { |
| /** A constant for integer optional values */ |
| public static final int NULL = -1; |
| |
| /** An empty list of principal names */ |
| public static final List<String> EMPTY_PRINCIPAL_NAME = new ArrayList<String>(); |
| |
| /** |
| * an order preserved map containing cipher names to the corresponding algorithm |
| * names in the descending order of strength |
| */ |
| private static final Map<String, String> cipherAlgoMap = new LinkedHashMap<String, String>(); |
| |
| public static final TimeZone UTC_TIME_ZONE = TimeZone.getTimeZone( "UTC" ); |
| |
| /** Defines a default date format with a "yyyyMMddHHmmss'Z'" pattern */ |
| public static final SimpleDateFormat UTC_DATE_FORMAT = new SimpleDateFormat( "yyyyMMddHHmmss'Z'" ); |
| |
| private static final Set<EncryptionType> oldEncTypes = new HashSet<EncryptionType>(); |
| |
| static |
| { |
| UTC_DATE_FORMAT.setTimeZone( UTC_TIME_ZONE ); |
| |
| cipherAlgoMap.put( "rc4", "ArcFourHmac" ); |
| cipherAlgoMap.put( "aes256", "AES256" ); |
| cipherAlgoMap.put( "aes128", "AES128" ); |
| cipherAlgoMap.put( "des3", "DESede" ); |
| cipherAlgoMap.put( "des", "DES" ); |
| |
| oldEncTypes.add( DES_CBC_CRC ); |
| oldEncTypes.add( DES_CBC_MD4 ); |
| oldEncTypes.add( DES_CBC_MD5 ); |
| oldEncTypes.add( DES_EDE3_CBC_ENV_OID ); |
| oldEncTypes.add( DES3_CBC_MD5 ); |
| oldEncTypes.add( DES3_CBC_SHA1 ); |
| oldEncTypes.add( DES3_CBC_SHA1_KD ); |
| oldEncTypes.add( DSAWITHSHA1_CMSOID ); |
| oldEncTypes.add( MD5WITHRSAENCRYPTION_CMSOID ); |
| oldEncTypes.add( SHA1WITHRSAENCRYPTION_CMSOID ); |
| oldEncTypes.add( RC2CBC_ENVOID ); |
| oldEncTypes.add( RSAENCRYPTION_ENVOID ); |
| oldEncTypes.add( RSAES_OAEP_ENV_OID ); |
| oldEncTypes.add( RC4_HMAC ); |
| } |
| |
| |
| /** |
| * Parse a KerberosPrincipal instance and return the names. The Principal name |
| * is described in RFC 1964 : <br/> |
| * <br/> |
| * This name type corresponds to the single-string representation of a<br/> |
| * Kerberos name. (Within the MIT Kerberos V5 implementation, such<br/> |
| * names are parseable with the krb5_parse_name() function.) The<br/> |
| * elements included within this name representation are as follows,<br/> |
| * proceeding from the beginning of the string:<br/> |
| * <br/> |
| * (1) One or more principal name components; if more than one<br/> |
| * principal name component is included, the components are<br/> |
| * separated by `/`. Arbitrary octets may be included within<br/> |
| * principal name components, with the following constraints and<br/> |
| * special considerations:<br/> |
| * <br/> |
| * (1a) Any occurrence of the characters `@` or `/` within a<br/> |
| * name component must be immediately preceded by the `\`<br/> |
| * quoting character, to prevent interpretation as a component<br/> |
| * or realm separator.<br/> |
| * <br/> |
| * (1b) The ASCII newline, tab, backspace, and null characters<br/> |
| * may occur directly within the component or may be<br/> |
| * represented, respectively, by `\n`, `\t`, `\b`, or `\0`.<br/> |
| * <br/> |
| * (1c) If the `\` quoting character occurs outside the contexts<br/> |
| * described in (1a) and (1b) above, the following character is<br/> |
| * interpreted literally. As a special case, this allows the<br/> |
| * doubled representation `\\` to represent a single occurrence<br/> |
| * of the quoting character.<br/> |
| * <br/> |
| * (1d) An occurrence of the `\` quoting character as the last<br/> |
| * character of a component is illegal.<br/> |
| * <br/> |
| * (2) Optionally, a `@` character, signifying that a realm name<br/> |
| * immediately follows. If no realm name element is included, the<br/> |
| * local realm name is assumed. The `/` , `:`, and null characters<br/> |
| * may not occur within a realm name; the `@`, newline, tab, and<br/> |
| * backspace characters may be included using the quoting<br/> |
| * conventions described in (1a), (1b), and (1c) above.<br/> |
| * |
| * @param principal The principal to be parsed |
| * @return The names as a List of nameComponent |
| * |
| * @throws ParseException if the name is not valid |
| */ |
| public static List<String> getNames( KerberosPrincipal principal ) throws ParseException |
| { |
| if ( principal == null ) |
| { |
| return EMPTY_PRINCIPAL_NAME; |
| } |
| |
| String names = principal.getName(); |
| |
| if ( Strings.isEmpty( names ) ) |
| { |
| // Empty name... |
| return EMPTY_PRINCIPAL_NAME; |
| } |
| |
| return getNames( names ); |
| } |
| |
| |
| /** |
| * Parse a PrincipalName and return the names. |
| */ |
| public static List<String> getNames( String principalNames ) throws ParseException |
| { |
| if ( principalNames == null ) |
| { |
| return EMPTY_PRINCIPAL_NAME; |
| } |
| |
| List<String> nameComponents = new ArrayList<String>(); |
| |
| // Start the parsing. Another State Machine :) |
| char[] chars = principalNames.toCharArray(); |
| |
| boolean escaped = false; |
| boolean done = false; |
| int start = 0; |
| int pos = 0; |
| |
| for ( int i = 0; i < chars.length; i++ ) |
| { |
| pos = i; |
| |
| switch ( chars[i] ) |
| { |
| case '\\': |
| escaped = !escaped; |
| break; |
| |
| case '/': |
| if ( escaped ) |
| { |
| escaped = false; |
| } |
| else |
| { |
| // We have a new name component |
| if ( i - start > 0 ) |
| { |
| String nameComponent = new String( chars, start, i - start ); |
| nameComponents.add( nameComponent ); |
| start = i + 1; |
| } |
| else |
| { |
| throw new ParseException( I18n.err( I18n.ERR_628 ), i ); |
| } |
| } |
| |
| break; |
| |
| case '@': |
| if ( escaped ) |
| { |
| escaped = false; |
| } |
| else |
| { |
| // We have reached the realm : let's get out |
| done = true; |
| } |
| |
| break; |
| |
| default: |
| } |
| |
| if ( done ) |
| { |
| // We have a new name component |
| if ( i - start > 0 ) |
| { |
| String nameComponent = new String( chars, start, i - start ); |
| nameComponents.add( nameComponent ); |
| start = i + 1; |
| } |
| else |
| { |
| throw new ParseException( I18n.err( I18n.ERR_628 ), i ); |
| } |
| |
| break; |
| } |
| else if ( i + 1 == chars.length ) |
| { |
| // We have a new name component |
| String nameComponent = new String( chars, start, i - start + 1 ); |
| nameComponents.add( nameComponent ); |
| |
| break; |
| } |
| } |
| |
| if ( escaped ) |
| { |
| throw new ParseException( I18n.err( I18n.ERR_629 ), pos ); |
| } |
| |
| return nameComponents; |
| } |
| |
| |
| /** |
| * Constructs a KerberosPrincipal from a PrincipalName and an |
| * optional realm |
| * |
| * @param principal The principal name and type |
| * @param realm The optional realm |
| * |
| * @return A KerberosPrincipal |
| */ |
| public static KerberosPrincipal getKerberosPrincipal( PrincipalName principal, String realm ) |
| { |
| String name = principal.getNameString(); |
| |
| if ( !Strings.isEmpty( realm ) ) |
| { |
| name += '@' + realm; |
| } |
| |
| return new KerberosPrincipal( name, principal.getNameType().getValue() ); |
| } |
| |
| |
| /** |
| * Get the matching encryption type from the configured types, searching |
| * into the requested types. We returns the first we find. |
| * |
| * @param requestedTypes The client encryption types |
| * @param configuredTypes The configured encryption types |
| * @return The first matching encryption type. |
| */ |
| public static EncryptionType getBestEncryptionType( Set<EncryptionType> requestedTypes, |
| Set<EncryptionType> configuredTypes ) |
| { |
| for ( EncryptionType encryptionType : configuredTypes ) |
| { |
| if ( requestedTypes.contains( encryptionType ) ) |
| { |
| return encryptionType; |
| } |
| } |
| |
| return null; |
| } |
| |
| |
| /** |
| * Build a list of encryptionTypes |
| * |
| * @param encryptionTypes The encryptionTypes |
| * @return A list comma separated of the encryptionTypes |
| */ |
| public static String getEncryptionTypesString( Set<EncryptionType> encryptionTypes ) |
| { |
| StringBuilder sb = new StringBuilder(); |
| boolean isFirst = true; |
| |
| for ( EncryptionType etype : encryptionTypes ) |
| { |
| if ( isFirst ) |
| { |
| isFirst = false; |
| } |
| else |
| { |
| sb.append( ", " ); |
| } |
| |
| sb.append( etype ); |
| } |
| |
| return sb.toString(); |
| } |
| |
| |
| public static boolean isKerberosString( byte[] value ) |
| { |
| if ( value == null ) |
| { |
| return false; |
| } |
| |
| for ( byte b : value ) |
| { |
| if ( ( b < 0x20 ) || ( b > 0x7E ) ) |
| { |
| return false; |
| } |
| } |
| |
| return true; |
| } |
| |
| |
| public static String getAlgoNameFromEncType( EncryptionType encType ) |
| { |
| String cipherName = encType.getName().toLowerCase(); |
| |
| for ( String c : cipherAlgoMap.keySet() ) |
| { |
| if ( cipherName.startsWith( c ) ) |
| { |
| return cipherAlgoMap.get( c ); |
| } |
| } |
| |
| throw new IllegalArgumentException( "Unknown algorithm name for the encryption type " + encType ); |
| } |
| |
| |
| /** |
| * Order a list of EncryptionType in a decreasing strength order |
| * |
| * @param etypes The ETypes to order |
| * @return A list of ordered ETypes. he strongest is on the left. |
| */ |
| public static Set<EncryptionType> orderEtypesByStrength( Set<EncryptionType> etypes ) |
| { |
| Set<EncryptionType> ordered = new LinkedHashSet<EncryptionType>( etypes.size() ); |
| |
| for ( String algo : cipherAlgoMap.values() ) |
| { |
| for ( EncryptionType encType : etypes ) |
| { |
| String foundAlgo = getAlgoNameFromEncType( encType ); |
| |
| if ( algo.equals( foundAlgo ) ) |
| { |
| ordered.add( encType ); |
| } |
| } |
| } |
| |
| return ordered; |
| } |
| |
| |
| /** |
| * Get a PrincipalStoreEntry given a principal. The ErrorType is used to indicate |
| * whether any resulting error pertains to a server or client. |
| */ |
| public static PrincipalStoreEntry getEntry( KerberosPrincipal principal, PrincipalStore store, ErrorType errorType ) |
| throws KerberosException |
| { |
| PrincipalStoreEntry entry = null; |
| |
| try |
| { |
| entry = store.getPrincipal( principal ); |
| } |
| catch ( Exception e ) |
| { |
| throw new KerberosException( errorType, e ); |
| } |
| |
| if ( entry == null ) |
| { |
| throw new KerberosException( errorType ); |
| } |
| |
| if ( entry.getKeyMap() == null || entry.getKeyMap().isEmpty() ) |
| { |
| throw new KerberosException( ErrorType.KDC_ERR_NULL_KEY ); |
| } |
| |
| return entry; |
| } |
| |
| |
| /** |
| * Verifies an AuthHeader using guidelines from RFC 1510 section A.10., "KRB_AP_REQ verification." |
| * |
| * @param authHeader |
| * @param ticket |
| * @param serverKey |
| * @param clockSkew |
| * @param replayCache |
| * @param emptyAddressesAllowed |
| * @param clientAddress |
| * @param lockBox |
| * @param authenticatorKeyUsage |
| * @param isValidate |
| * @return The authenticator. |
| * @throws KerberosException |
| */ |
| public static Authenticator verifyAuthHeader( ApReq authHeader, Ticket ticket, EncryptionKey serverKey, |
| long clockSkew, ReplayCache replayCache, boolean emptyAddressesAllowed, InetAddress clientAddress, |
| CipherTextHandler lockBox, KeyUsage authenticatorKeyUsage, boolean isValidate ) throws KerberosException |
| { |
| if ( authHeader.getProtocolVersionNumber() != KerberosConstants.KERBEROS_V5 ) |
| { |
| throw new KerberosException( ErrorType.KRB_AP_ERR_BADVERSION ); |
| } |
| |
| if ( authHeader.getMessageType() != KerberosMessageType.AP_REQ ) |
| { |
| throw new KerberosException( ErrorType.KRB_AP_ERR_MSG_TYPE ); |
| } |
| |
| if ( authHeader.getTicket().getTktVno() != KerberosConstants.KERBEROS_V5 ) |
| { |
| throw new KerberosException( ErrorType.KRB_AP_ERR_BADVERSION ); |
| } |
| |
| EncryptionKey ticketKey = null; |
| |
| if ( authHeader.getOption( ApOptions.USE_SESSION_KEY ) ) |
| { |
| ticketKey = authHeader.getTicket().getEncTicketPart().getKey(); |
| } |
| else |
| { |
| ticketKey = serverKey; |
| } |
| |
| if ( ticketKey == null ) |
| { |
| // TODO - check server key version number, skvno; requires store |
| // if ( false ) |
| // { |
| // throw new KerberosException( ErrorType.KRB_AP_ERR_BADKEYVER ); |
| // } |
| |
| throw new KerberosException( ErrorType.KRB_AP_ERR_NOKEY ); |
| } |
| |
| byte[] encTicketPartData = lockBox.decrypt( ticketKey, ticket.getEncPart(), |
| KeyUsage.AS_OR_TGS_REP_TICKET_WITH_SRVKEY ); |
| EncTicketPart encPart = KerberosDecoder.decodeEncTicketPart( encTicketPartData ); |
| ticket.setEncTicketPart( encPart ); |
| |
| byte[] authenticatorData = lockBox.decrypt( ticket.getEncTicketPart().getKey(), authHeader.getAuthenticator(), |
| authenticatorKeyUsage ); |
| |
| Authenticator authenticator = KerberosDecoder.decodeAuthenticator( authenticatorData ); |
| |
| if ( !authenticator.getCName().getNameString().equals( ticket.getEncTicketPart().getCName().getNameString() ) ) |
| { |
| throw new KerberosException( ErrorType.KRB_AP_ERR_BADMATCH ); |
| } |
| |
| if ( ticket.getEncTicketPart().getClientAddresses() != null ) |
| { |
| if ( !ticket.getEncTicketPart().getClientAddresses().contains( new HostAddress( clientAddress ) ) ) |
| { |
| throw new KerberosException( ErrorType.KRB_AP_ERR_BADADDR ); |
| } |
| } |
| else |
| { |
| if ( !emptyAddressesAllowed ) |
| { |
| throw new KerberosException( ErrorType.KRB_AP_ERR_BADADDR ); |
| } |
| } |
| |
| KerberosPrincipal serverPrincipal = getKerberosPrincipal( ticket.getSName(), ticket.getRealm() ); |
| KerberosPrincipal clientPrincipal = getKerberosPrincipal( authenticator.getCName(), authenticator.getCRealm() ); |
| KerberosTime clientTime = authenticator.getCtime(); |
| int clientMicroSeconds = authenticator.getCusec(); |
| |
| if ( replayCache != null ) |
| { |
| if ( replayCache.isReplay( serverPrincipal, clientPrincipal, clientTime, clientMicroSeconds ) ) |
| { |
| throw new KerberosException( ErrorType.KRB_AP_ERR_REPEAT ); |
| } |
| |
| replayCache.save( serverPrincipal, clientPrincipal, clientTime, clientMicroSeconds ); |
| } |
| |
| if ( !authenticator.getCtime().isInClockSkew( clockSkew ) ) |
| { |
| throw new KerberosException( ErrorType.KRB_AP_ERR_SKEW ); |
| } |
| |
| /* |
| * "The server computes the age of the ticket: local (server) time minus |
| * the starttime inside the Ticket. If the starttime is later than the |
| * current time by more than the allowable clock skew, or if the INVALID |
| * flag is set in the ticket, the KRB_AP_ERR_TKT_NYV error is returned." |
| */ |
| KerberosTime startTime = ( ticket.getEncTicketPart().getStartTime() != null ) ? ticket.getEncTicketPart() |
| .getStartTime() : ticket.getEncTicketPart().getAuthTime(); |
| |
| KerberosTime now = new KerberosTime(); |
| boolean isValidStartTime = startTime.lessThan( now ); |
| |
| if ( !isValidStartTime || ( ticket.getEncTicketPart().getFlags().isInvalid() && !isValidate ) ) |
| { |
| // it hasn't yet become valid |
| throw new KerberosException( ErrorType.KRB_AP_ERR_TKT_NYV ); |
| } |
| |
| // TODO - doesn't take into account skew |
| if ( !ticket.getEncTicketPart().getEndTime().greaterThan( now ) ) |
| { |
| throw new KerberosException( ErrorType.KRB_AP_ERR_TKT_EXPIRED ); |
| } |
| |
| authHeader.getApOptions().set( ApOptions.MUTUAL_REQUIRED ); |
| |
| return authenticator; |
| } |
| |
| |
| /** |
| * checks if the given encryption type is *new* (ref sec#3.1.3 of rfc4120) |
| * |
| * @param eType the encryption type |
| * @return true if the encryption type is new, false otherwise |
| */ |
| public static boolean isNewEncryptionType( EncryptionType eType ) |
| { |
| return !oldEncTypes.contains( eType ); |
| } |
| |
| /** |
| * Verifies an AuthHeader using guidelines from RFC 1510 section A.10., "KRB_AP_REQ verification." |
| * |
| * @param authHeader |
| * @param ticket |
| * @param serverKey |
| * @param clockSkew |
| * @param replayCache |
| * @param emptyAddressesAllowed |
| * @param clientAddress |
| * @param lockBox |
| * @param authenticatorKeyUsage |
| * @param isValidate |
| * @return The authenticator. |
| * @throws KerberosException |
| * |
| public static Authenticator verifyAuthHeader( ApplicationRequest authHeader, Ticket ticket, EncryptionKey serverKey, |
| long clockSkew, ReplayCache replayCache, boolean emptyAddressesAllowed, InetAddress clientAddress, |
| CipherTextHandler lockBox, KeyUsage authenticatorKeyUsage, boolean isValidate ) throws KerberosException |
| { |
| if ( authHeader.getProtocolVersionNumber() != KerberosConstants.KERBEROS_V5 ) |
| { |
| throw new KerberosException( ErrorType.KRB_AP_ERR_BADVERSION ); |
| } |
| |
| if ( authHeader.getMessageType() != KerberosMessageType.AP_REQ ) |
| { |
| throw new KerberosException( ErrorType.KRB_AP_ERR_MSG_TYPE ); |
| } |
| |
| if ( authHeader.getTicket().getTktVno() != KerberosConstants.KERBEROS_V5 ) |
| { |
| throw new KerberosException( ErrorType.KRB_AP_ERR_BADVERSION ); |
| } |
| |
| EncryptionKey ticketKey = null; |
| |
| if ( authHeader.getOption( ApOptions.USE_SESSION_KEY ) ) |
| { |
| ticketKey = authHeader.getTicket().getEncTicketPart().getSessionKey(); |
| } |
| else |
| { |
| ticketKey = serverKey; |
| } |
| |
| if ( ticketKey == null ) |
| { |
| // TODO - check server key version number, skvno; requires store |
| if ( false ) |
| { |
| throw new KerberosException( ErrorType.KRB_AP_ERR_BADKEYVER ); |
| } |
| |
| throw new KerberosException( ErrorType.KRB_AP_ERR_NOKEY ); |
| } |
| |
| EncTicketPart encPart = ( EncTicketPart ) lockBox.unseal( EncTicketPart.class, ticketKey, ticket.getEncPart(), |
| KeyUsage.NUMBER2 ); |
| ticket.setEncTicketPart( encPart ); |
| |
| Authenticator authenticator = ( Authenticator ) lockBox.unseal( Authenticator.class, ticket.getEncTicketPart().getSessionKey(), |
| authHeader.getEncPart(), authenticatorKeyUsage ); |
| |
| if ( !authenticator.getClientPrincipal().getName().equals( ticket.getEncTicketPart().getClientPrincipal().getName() ) ) |
| { |
| throw new KerberosException( ErrorType.KRB_AP_ERR_BADMATCH ); |
| } |
| |
| if ( ticket.getEncTicketPart().getClientAddresses() != null ) |
| { |
| if ( !ticket.getEncTicketPart().getClientAddresses().contains( new HostAddress( clientAddress ) ) ) |
| { |
| throw new KerberosException( ErrorType.KRB_AP_ERR_BADADDR ); |
| } |
| } |
| else |
| { |
| if ( !emptyAddressesAllowed ) |
| { |
| throw new KerberosException( ErrorType.KRB_AP_ERR_BADADDR ); |
| } |
| } |
| |
| KerberosPrincipal serverPrincipal = ticket.getServerPrincipal(); |
| KerberosPrincipal clientPrincipal = authenticator.getClientPrincipal(); |
| KerberosTime clientTime = authenticator.getClientTime(); |
| int clientMicroSeconds = authenticator.getClientMicroSecond(); |
| |
| if ( replayCache.isReplay( serverPrincipal, clientPrincipal, clientTime, clientMicroSeconds ) ) |
| { |
| throw new KerberosException( ErrorType.KRB_AP_ERR_REPEAT ); |
| } |
| |
| replayCache.save( serverPrincipal, clientPrincipal, clientTime, clientMicroSeconds ); |
| |
| if ( !authenticator.getClientTime().isInClockSkew( clockSkew ) ) |
| { |
| throw new KerberosException( ErrorType.KRB_AP_ERR_SKEW ); |
| } |
| |
| /* |
| * "The server computes the age of the ticket: local (server) time minus |
| * the starttime inside the Ticket. If the starttime is later than the |
| * current time by more than the allowable clock skew, or if the INVALID |
| * flag is set in the ticket, the KRB_AP_ERR_TKT_NYV error is returned." |
| * |
| KerberosTime startTime = ( ticket.getEncTicketPart().getStartTime() != null ) ? ticket.getEncTicketPart().getStartTime() : ticket.getEncTicketPart().getAuthTime(); |
| |
| KerberosTime now = new KerberosTime(); |
| boolean isValidStartTime = startTime.lessThan( now ); |
| |
| if ( !isValidStartTime || ( ticket.getEncTicketPart().getFlags().isInvalid() && !isValidate ) ) |
| { |
| // it hasn't yet become valid |
| throw new KerberosException( ErrorType.KRB_AP_ERR_TKT_NYV ); |
| } |
| |
| // TODO - doesn't take into account skew |
| if ( !ticket.getEncTicketPart().getEndTime().greaterThan( now ) ) |
| { |
| throw new KerberosException( ErrorType.KRB_AP_ERR_TKT_EXPIRED ); |
| } |
| |
| authHeader.setOption( ApOptions.MUTUAL_REQUIRED ); |
| |
| return authenticator; |
| }*/ |
| } |
