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      1 package com.android.anqp.eap;
      2 
      3 import java.net.ProtocolException;
      4 import java.nio.ByteBuffer;
      5 import java.util.EnumMap;
      6 import java.util.HashMap;
      7 import java.util.Map;
      8 
      9 import static com.android.anqp.Constants.BYTE_MASK;
     10 
     11 /**
     12  * An EAP authentication parameter, IEEE802.11-2012, table 8-188
     13  */
     14 public class NonEAPInnerAuth implements AuthParam {
     15 
     16     public enum NonEAPType {Reserved, PAP, CHAP, MSCHAP, MSCHAPv2}
     17     private static final Map<NonEAPType, String> sOmaMap = new EnumMap<>(NonEAPType.class);
     18     private static final Map<String, NonEAPType> sRevOmaMap = new HashMap<>();
     19 
     20     private final NonEAPType mType;
     21 
     22     static {
     23         sOmaMap.put(NonEAPType.PAP, "PAP");
     24         sOmaMap.put(NonEAPType.CHAP, "CHAP");
     25         sOmaMap.put(NonEAPType.MSCHAP, "MS-CHAP");
     26         sOmaMap.put(NonEAPType.MSCHAPv2, "MS-CHAP-V2");
     27 
     28         for (Map.Entry<NonEAPType, String> entry : sOmaMap.entrySet()) {
     29             sRevOmaMap.put(entry.getValue(), entry.getKey());
     30         }
     31     }
     32 
     33     public NonEAPInnerAuth(int length, ByteBuffer payload) throws ProtocolException {
     34         if (length != 1) {
     35             throw new ProtocolException("Bad length: " + payload.remaining());
     36         }
     37 
     38         int typeID = payload.get() & BYTE_MASK;
     39         mType = typeID < NonEAPType.values().length ?
     40                 NonEAPType.values()[typeID] :
     41                 NonEAPType.Reserved;
     42     }
     43 
     44     public NonEAPInnerAuth(NonEAPType type) {
     45         mType = type;
     46     }
     47 
     48     /**
     49      * Construct from the OMA-DM PPS data
     50      * @param eapType as defined in the HS2.0 spec.
     51      */
     52     public NonEAPInnerAuth(String eapType) {
     53         mType = sRevOmaMap.get(eapType);
     54     }
     55 
     56     @Override
     57     public EAP.AuthInfoID getAuthInfoID() {
     58         return EAP.AuthInfoID.NonEAPInnerAuthType;
     59     }
     60 
     61     public NonEAPType getType() {
     62         return mType;
     63     }
     64 
     65     public String getOMAtype() {
     66         return sOmaMap.get(mType);
     67     }
     68 
     69     public static String mapInnerType(NonEAPType type) {
     70         return sOmaMap.get(type);
     71     }
     72 
     73     @Override
     74     public int hashCode() {
     75         return mType.hashCode();
     76     }
     77 
     78     @Override
     79     public boolean equals(Object thatObject) {
     80         if (thatObject == this) {
     81             return true;
     82         } else if (thatObject == null || thatObject.getClass() != NonEAPInnerAuth.class) {
     83             return false;
     84         } else {
     85             return ((NonEAPInnerAuth) thatObject).getType() == getType();
     86         }
     87     }
     88 
     89     @Override
     90     public String toString() {
     91         return "Auth method NonEAPInnerAuthEAP, inner = " + mType + '\n';
     92     }
     93 }
     94