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1 /*
2  * Copyright (C) 2019 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package com.android.internal.net.eap.test.message;
18 
19 import static com.android.internal.net.TestUtils.hexStringToByteArray;
20 import static com.android.internal.net.eap.test.message.simaka.attributes.EapTestAttributeDefinitions.AT_VERSION_LIST_DATA;
21 import static com.android.internal.net.eap.test.message.simaka.attributes.EapTestAttributeDefinitions.IDENTITY_STRING;
22 import static com.android.internal.net.eap.test.message.simaka.attributes.EapTestAttributeDefinitions.NONCE_MT_STRING;
23 import static com.android.internal.net.eap.test.message.simaka.attributes.EapTestAttributeDefinitions.RAND_1;
24 import static com.android.internal.net.eap.test.message.simaka.attributes.EapTestAttributeDefinitions.RAND_2;
25 import static com.android.internal.net.eap.test.message.simaka.attributes.EapTestAttributeDefinitions.RES;
26 
27 /**
28  * EapTestMessageDefinitions provides byte[] encodings of commonly used EAP Messages.
29  *
30  * @see <a href="https://tools.ietf.org/html/rfc3748#section-4">RFC 3748, Extensible Authentication
31  * Protocol (EAP)</a>
32  */
33 public class EapTestMessageDefinitions {
34     public static final String ID = "10";
35     public static final int ID_INT = Integer.parseInt(ID, 16 /* radix */);
36 
37     // EAP-AKA Identity request
38     public static final String EAP_REQUEST_TYPE_DATA = "0500000D010000";
39     public static final byte[] EAP_AKA_IDENTITY_REQUEST =
40             hexStringToByteArray(EAP_REQUEST_TYPE_DATA);
41 
42     // EAP-AKA/Identity request with no attributes
43     public static final byte[] EAP_REQUEST_AKA = hexStringToByteArray("01" + ID + "000817050000");
44     public static final byte[] EAP_REQUEST_AKA_IDENTITY_PACKET =
45             hexStringToByteArray("01" + ID + "000A17" + EAP_REQUEST_TYPE_DATA);
46     public static final byte[] EAP_REQUEST_IDENTITY_PACKET =
47             hexStringToByteArray("01" + ID + "000501");
48     public static final byte[] EAP_REQUEST_IDENTITY_PACKET_TOO_LONG =
49             hexStringToByteArray("01" + ID + "00050100");
50 
51     // EAP-Identity: hex for ASCII in "test@android.net"
52     public static final String EAP_IDENTITY_STRING = "7465737440616E64726F69642E6E6574";
53     public static final byte[] EAP_IDENTITY = hexStringToByteArray(EAP_IDENTITY_STRING);
54     public static final byte[] EAP_RESPONSE_IDENTITY_PACKET =
55             hexStringToByteArray("02" + ID + "001501" + EAP_IDENTITY_STRING);
56     public static final byte[] EAP_RESPONSE_IDENTITY_DEFAULT_PACKET =
57             hexStringToByteArray("02" + ID + "000501");
58     public static final byte[] EAP_REQUEST_NOTIFICATION_PACKET =
59             hexStringToByteArray("01" + ID + "000802AABBCC");
60     public static final byte[] EAP_SUCCESS_PACKET = hexStringToByteArray("03" + ID + "0004");
61     public static final byte[] EAP_FAILURE_PACKET = hexStringToByteArray("04" + ID + "0004");
62     public static final byte[] EAP_SIM_CLIENT_ERROR_RESPONSE =
63             hexStringToByteArray("02" + ID + "000C120E000016010001");
64     public static final byte[] EAP_SIM_CLIENT_ERROR_INSUFFICIENT_CHALLENGES =
65             hexStringToByteArray("02" + ID + "000C120E000016010002");
66     public static final byte[] EAP_SIM_CLIENT_ERROR_UNABLE_TO_PROCESS =
67             hexStringToByteArray("02" + ID + "000C120E000016010000");
68     public static final byte[] EAP_AKA_CLIENT_ERROR_UNABLE_TO_PROCESS =
69             hexStringToByteArray("02" + ID + "000C170E000016010000");
70 
71     // EAP-SIM response containing SELECTED_VERSION (1) and IDENTITY attributes
72     public static final byte[] EAP_SIM_RESPONSE_PACKET = hexStringToByteArray(
73             "02" + ID + "0024120A0000100100010E060011" + IDENTITY_STRING + "000000");
74     public static final byte[] EAP_SIM_RESPONSE_WITHOUT_IDENTITY =
75             hexStringToByteArray("02" + ID + "0020120A000007050000" + NONCE_MT_STRING + "10010001");
76     public static final byte[] EAP_SIM_NOTIFICATION_RESPONSE = hexStringToByteArray(
77             "02" + ID + "0008120C0000");
78     public static final byte[] EAP_AKA_NOTIFICATION_RESPONSE =
79             hexStringToByteArray("02" + ID + "0008170C0000");
80 
81     // Body of EapData is the list of supported methods
82     public static final byte[] EAP_RESPONSE_NAK_PACKET =
83             hexStringToByteArray("02" + ID + "00060312");
84     public static final byte[] EAP_RESPONSE_NOTIFICATION_PACKET =
85             hexStringToByteArray("02" + ID + "000502");
86     public static final byte[] EAP_REQUEST_MD5_CHALLENGE =
87             hexStringToByteArray("01" + ID + "000504");
88     public static final byte[] EAP_REQUEST_NAK_PACKET =
89             hexStringToByteArray("01" + ID + "000503");
90     public static final String EAP_REQUEST_SIM_TYPE_DATA = "0A00000F02000200010000";
91     public static final byte[] EAP_REQUEST_SIM_START_PACKET =
92             hexStringToByteArray("01" + ID + "001012" + EAP_REQUEST_SIM_TYPE_DATA);
93 
94     public static final byte[] REQUEST_UNSUPPORTED_TYPE_PACKET =
95             hexStringToByteArray("01" + ID + "0005FF");
96     public static final byte[] REQUEST_MISSING_TYPE_PACKET =
97             hexStringToByteArray("01" + ID + "0004");
98     public static final byte[] LONG_SUCCESS_PACKET = hexStringToByteArray("03" + ID + "000500");
99     public static final byte[] SHORT_PACKET = hexStringToByteArray("01" + ID + "0005");
100     public static final byte[] INCOMPLETE_HEADER_PACKET = hexStringToByteArray("03" + ID);
101     public static final byte[] INVALID_CODE_PACKET = hexStringToByteArray("F0" + ID + "0004");
102 
103     // Attributes
104     public static final String SKIPPABLE_DATA = "112233445566";
105     public static final byte[] SKIPPABLE_DATA_BYTES = hexStringToByteArray(SKIPPABLE_DATA);
106     public static final byte[] SKIPPABLE_INVALID_ATTRIBUTE =
107             hexStringToByteArray("FF02" + SKIPPABLE_DATA);
108     public static final byte[] NON_SKIPPABLE_INVALID_ATTRIBUTE =
109             hexStringToByteArray("7F010000");
110 
111     // Type-Data
112     public static final byte[] EAP_SIM_START_SUBTYPE =
113             hexStringToByteArray("0A00000F02" + AT_VERSION_LIST_DATA + "0A010000");
114     public static final byte[] INVALID_SUBTYPE = hexStringToByteArray("FF");
115     public static final byte[] TYPE_DATA_INVALID_AT_RAND =
116             hexStringToByteArray("0A000001050000" + RAND_1);
117     public static final byte[] SHORT_TYPE_DATA = hexStringToByteArray("0A");
118     public static final byte[] TYPE_DATA_INVALID_ATTRIBUTE =
119             hexStringToByteArray("0A00007F01");
120     public static final byte[] EAP_SIM_START_DUPLICATE_ATTRIBUTES =
121             hexStringToByteArray("0A00000F02" + "0A010000" + "0A010000");
122 
123     // RAND Challenge Results
124     public static final String SRES_1 = "11223344";
125     public static final byte[] SRES_1_BYTES = hexStringToByteArray(SRES_1);
126     public static final String SRES_2 = "44332211";
127     public static final byte[] SRES_2_BYTES = hexStringToByteArray(SRES_2);
128     public static final byte[] SRES_BYTES = hexStringToByteArray(SRES_1 + SRES_2);
129     public static final String KC_1 = "0102030405060708";
130     public static final byte[] KC_1_BYTES = hexStringToByteArray(KC_1);
131     public static final String KC_2 = "0807060504030201";
132     public static final byte[] KC_2_BYTES = hexStringToByteArray(KC_2);
133     public static final byte[] VALID_CHALLENGE_RESPONSE =
134             hexStringToByteArray("04" + SRES_1 + "08" + KC_1);
135     public static final byte[] CHALLENGE_RESPONSE_INVALID_SRES = hexStringToByteArray("03");
136     public static final byte[] CHALLENGE_RESPONSE_INVALID_KC =
137             hexStringToByteArray("04" + SRES_1 + "04");
138 
139     public static final String IMSI = "123456789012345";
140     public static final String EAP_SIM_IDENTITY = "1" + IMSI;
141     public static final byte[] EAP_SIM_IDENTITY_BYTES = hexStringToByteArray(EAP_SIM_IDENTITY);
142 
143     // ASCII hex for "0" + IMSI (EAP-AKA identity format)
144     public static final String EAP_AKA_IDENTITY_BYTES = "30313233343536373839303132333435";
145 
146     // Master Key generation
147     public static final String MK_STRING = "0123456789ABCDEF0123456789ABCDEF01234567";
148     public static final byte[] MK = hexStringToByteArray(MK_STRING);
149     public static final String K_ENCR_STRING = "000102030405060708090A0B0C0D0E0F";
150     public static final byte[] K_ENCR = hexStringToByteArray(K_ENCR_STRING);
151     public static final String K_AUT_STRING = "0F0E0D0C0B0A09080706050403020100";
152     public static final byte[] K_AUT = hexStringToByteArray(K_AUT_STRING);
153     public static final String MSK_STRING =
154             "00112233445566778899AABBCCDDEEFF"
155             + "00112233445566778899AABBCCDDEEFF"
156             + "00112233445566778899AABBCCDDEEFF"
157             + "00112233445566778899AABBCCDDEEFF";
158     public static final byte[] MSK = hexStringToByteArray(MSK_STRING);
159     public static final String EMSK_STRING =
160             "FFEEDDCCBBAA99887766554433221100"
161             + "FFEEDDCCBBAA99887766554433221100"
162             + "FFEEDDCCBBAA99887766554433221100"
163             + "FFEEDDCCBBAA99887766554433221100";
164     public static final byte[] EMSK = hexStringToByteArray(EMSK_STRING);
165 
166     // MAC computation
167     public static final String ORIGINAL_MAC_STRING = "112233445566778899AABBCCDDEEFF11";
168     public static final byte[] ORIGINAL_MAC = hexStringToByteArray(ORIGINAL_MAC_STRING);
169     public static final String COMPUTED_MAC_STRING = "FFEEDDCCBBAA998877665544332211FF";
170     public static final byte[] COMPUTED_MAC = hexStringToByteArray(COMPUTED_MAC_STRING);
171     public static final String EAP_SIM_CHALLENGE_REQUEST_STRING =
172             "01" + ID + "0040" // EAP-Request | ID | length in bytes
173             + "120b0000" // EAP-SIM | Challenge | 2B padding
174             + "01090000" + RAND_1 + RAND_2 // EAP-SIM AT_RAND attribute
175             + "0B05000000000000000000000000000000000000"; // AT_MAC attribute with no MAC
176     public static final byte[] MAC_INPUT =
177             hexStringToByteArray(EAP_SIM_CHALLENGE_REQUEST_STRING + NONCE_MT_STRING);
178 
179     // Response Message with MAC
180     public static final String EAP_SIM_CHALLENGE_RESPONSE_EMPTY_MAC =
181             "02" + ID + "001C" // EAP-Response | ID | length in bytes
182             + "120b0000" // EAP-SIM | Challenge | 2B padding
183             + "0B05000000000000000000000000000000000000"; // AT_MAC attribute with no MAC
184     public static final byte[] EAP_SIM_CHALLENGE_RESPONSE_MAC_INPUT =
185             hexStringToByteArray(EAP_SIM_CHALLENGE_RESPONSE_EMPTY_MAC + SRES_1 + SRES_2);
186     public static final byte[] EAP_SIM_CHALLENGE_RESPONSE_WITH_MAC = hexStringToByteArray(
187             "02" + ID + "001C" // EAP-Response | ID | length in bytes
188             + "120b0000" // EAP-SIM | Challenge | 2B padding
189             + "0B050000" + COMPUTED_MAC_STRING); // AT_MAC attribute
190     public static final byte[] EAP_SIM_NOTIFICATION_REQUEST_WITH_EMPTY_MAC = hexStringToByteArray(
191             "01" + ID + "0020" // EAP-Request | ID | length in bytes
192                     + "120C0000" // EAP-SIM | Notification | 2B padding
193                     + "0C010000" // AT_NOTIFICATION attribute
194                     + "0B05000000000000000000000000000000000000"); // empty AT_MAC attribute
195     public static final byte[] EAP_SIM_NOTIFICATION_RESPONSE_WITH_EMPTY_MAC = hexStringToByteArray(
196             "02" + ID + "001C" // EAP-Response | ID | length in bytes
197                     + "120C0000" // EAP-SIM | Notification | 2B padding
198                     + "0B05000000000000000000000000000000000000"); // empty AT_MAC attribute
199     public static final byte[] EAP_SIM_NOTIFICATION_RESPONSE_WITH_MAC = hexStringToByteArray(
200             "02" + ID + "001C" // EAP-Response | ID | length in bytes
201             + "120C0000" // EAP-SIM | Notification | 2B padding
202             + "0B050000" + COMPUTED_MAC_STRING); // AT_MAC attribute
203 
204     public static final byte[] EAP_AKA_IDENTITY_RESPONSE =
205             hexStringToByteArray("02" + ID + "001C" // EAP-Response | ID | length in bytes
206                     + "17050000" // EAP-AKA | Identity | 2B padding
207                     + "0E050010" + EAP_AKA_IDENTITY_BYTES); // AT_IDENTITY ("0" + IMSI)
208 
209     // Base64 of: FF0111
210     public static final String EAP_AKA_UICC_RESP_INVALID_TAG = "/wER";
211 
212     // Base64 of: DC0E112233445566778899AABBCCDDEE
213     public static final String EAP_AKA_UICC_RESP_SYNCHRONIZE_BASE_64 = "3A4RIjNEVWZ3iJmqu8zd7g==";
214 
215     public static final byte[] EAP_AKA_SYNCHRONIZATION_FAILURE =
216             hexStringToByteArray("02" + ID + "0018" // EAP-Response | ID | length in bytes
217                     + "17040000" // EAP-SIM | Synchronization-Failure | 2B padding
218                     + "0404112233445566778899AABBCCDDEE"); // AT_AUTS attribute
219 
220     public static final String CK = "00112233445566778899AABBCCDDEEFF";
221     public static final byte[] CK_BYTES = hexStringToByteArray(CK);
222     public static final String IK = "FFEEDDCCBBAA99887766554433221100";
223     public static final byte[] IK_BYTES = hexStringToByteArray(IK);
224 
225     // Base-64 of: 'DB05' + RES_BYTES + '10' + CK + '10' + IK
226     // 'DB0511223344551000112233445566778899AABBCCDDEEFF10FFEEDDCCBBAA99887766554433221100'
227     public static final String EAP_AKA_UICC_RESP_SUCCESS_BASE_64 =
228             "2wURIjNEVRAAESIzRFVmd4iZqrvM3e7/EP/u3cy7qpmId2ZVRDMiEQA=";
229 
230     public static final byte[] EAP_AKA_AUTHENTICATION_REJECT =
231             hexStringToByteArray("02" + ID + "000817020000");
232     public static final String EAP_AKA_CHALLENGE_RESPONSE_MAC = "7086E8341306F99CDB949DBE9CAC4EB2";
233     public static final byte[] EAP_AKA_CHALLENGE_RESPONSE_MAC_BYTES =
234             hexStringToByteArray(EAP_AKA_CHALLENGE_RESPONSE_MAC);
235     public static final byte[] EAP_AKA_CHALLENGE_RESPONSE_TYPE_DATA =
236             hexStringToByteArray(
237                     "01000003030028" + RES + "0000000B050000" + EAP_AKA_CHALLENGE_RESPONSE_MAC);
238     public static final byte[] EAP_AKA_CHALLENGE_RESPONSE =
239             hexStringToByteArray(
240                     "02100028" // EAP-Response | ID | length in bytes
241                             + "17010000" // EAP-AKA | Challenge | 2B padding
242                             + "03030028" + RES + "000000" // AT_RES attribute
243                             + "0B050000" + EAP_AKA_CHALLENGE_RESPONSE_MAC); // AT_MAC attribute
244 
245     public static final byte[] EAP_SUCCESS = hexStringToByteArray("03860004");
246 
247     public static final byte[] EAP_REQUEST_MSCHAP_V2 =
248             hexStringToByteArray("01" + ID + "00061A01");
249 
250     // MSCHAPv2 Test vectors taken from RFC 2759#9.2 and RFC 3079#3.5.3
251     public static final String MSCHAP_V2_USERNAME = "User";
252     public static final String MSCHAP_V2_USERNAME_HEX = "55736572";
253     public static final byte[] MSCHAP_V2_USERNAME_ASCII_BYTES =
254             hexStringToByteArray(MSCHAP_V2_USERNAME_HEX);
255     public static final String MSCHAP_V2_PASSWORD = "clientPass";
256     public static final byte[] MSCHAP_V2_PASSWORD_UTF_BYTES =
257             hexStringToByteArray("63006C00690065006E0074005000610073007300");
258     public static final String MSCHAP_V2_AUTHENTICATOR_CHALLENGE_STRING =
259             "5B5D7C7D7B3F2F3E3C2C602132262628";
260     public static final byte[] MSCHAP_V2_AUTHENTICATOR_CHALLENGE =
261             hexStringToByteArray(MSCHAP_V2_AUTHENTICATOR_CHALLENGE_STRING);
262     public static final String MSCHAP_V2_PEER_CHALLENGE_STRING = "21402324255E262A28295F2B3A337C7E";
263     public static final byte[] MSCHAP_V2_PEER_CHALLENGE =
264             hexStringToByteArray(MSCHAP_V2_PEER_CHALLENGE_STRING);
265     public static final byte[] MSCHAP_V2_CHALLENGE = hexStringToByteArray("D02E4386BCE91226");
266     public static final byte[] MSCHAP_V2_PASSWORD_HASH =
267             hexStringToByteArray("44EBBA8D5312B8D611474411F56989AE");
268     public static final byte[] MSCHAP_V2_PASSWORD_HASH_HASH =
269             hexStringToByteArray("41C00C584BD2D91C4017A2A12FA59F3F");
270     public static final String MSCHAP_V2_NT_RESPONSE_STRING =
271             "82309ECD8D708B5EA08FAA3981CD83544233114A3D85D6DF";
272     public static final byte[] MSCHAP_V2_NT_RESPONSE =
273             hexStringToByteArray(MSCHAP_V2_NT_RESPONSE_STRING);
274     public static final byte[] MSCHAP_V2_AUTHENTICATOR_RESPONSE =
275             hexStringToByteArray("407A5589115FD0D6209F510FE9C04566932CDA56");
276     public static final byte[] MSCHAP_V2_MASTER_KEY =
277             hexStringToByteArray("FDECE3717A8C838CB388E527AE3CDD31");
278 
279     // generated based on RFC 3079#3.5.3 params
280     public static final String SEND_KEY = "D5F0E9521E3EA9589645E86051C82226";
281     public static final byte[] MSCHAP_V2_SEND_START_KEY = hexStringToByteArray(SEND_KEY);
282 
283     // This value is labeled 'send key' in RFC 3079#3.5.3. However, it's used as 'receive key' here,
284     // because send and receive keys are swapped for peers relative to authenticators.
285     public static final String RECEIVE_KEY = "8B7CDC149B993A1BA118CB153F56DCCB";
286     public static final byte[] MSCHAP_V2_RECEIVE_START_KEY = hexStringToByteArray(RECEIVE_KEY);
287 
288     // MSK: MSCHAP_V2_SEND_START_KEY + MSCHAP_V2_RECEIVE_START_KEY, padded to 64B
289     public static final byte[] MSCHAP_V2_MSK =
290             hexStringToByteArray(
291                     SEND_KEY
292                             + RECEIVE_KEY
293                             + "0000000000000000000000000000000000000000000000000000000000000000");
294     public static final int MSCHAP_V2_EMSK_LEN = 64;
295     public static final byte[] MSCHAP_V2_EMSK = new byte[MSCHAP_V2_EMSK_LEN];
296 
297     public static final String MSCHAP_V2_ID = "42";
298     public static final int MSCHAP_V2_ID_INT = Integer.parseInt(MSCHAP_V2_ID, 16 /* radix */);
299     public static final byte[] EAP_MSCHAP_V2_CHALLENGE_RESPONSE =
300             hexStringToByteArray("02" + ID + "003F" // EAP-Response | ID | length in bytes
301                     + "1A02" + MSCHAP_V2_ID // EAP-MSCHAPv2 | Response | MSCHAPv2 ID
302                     + "003A31" // MS length | Value Size (0x31)
303                     + MSCHAP_V2_PEER_CHALLENGE_STRING
304                     + "0000000000000000" // 8B (reserved)
305                     + MSCHAP_V2_NT_RESPONSE_STRING
306                     + "00" // Flags (always 0)
307                     + MSCHAP_V2_USERNAME_HEX);
308 
309     public static final byte[] EAP_MSCHAP_V2_SUCCESS_RESPONSE =
310             hexStringToByteArray("02" + ID + "0006" // EAP-Response | ID | length in bytes
311                     + "1A03"); // EAP-MSCHAPv2 | Success
312 
313     public static final byte[] INVALID_AUTHENTICATOR_RESPONSE = new byte[20];
314 
315     public static final byte[] EAP_MSCHAP_V2_FAILURE_RESPONSE =
316             hexStringToByteArray("02" + ID + "0006" // EAP-Response | ID | length in bytes
317                     + "1A04"); // EAP-MSCHAPv2 | Failure
318 
319     public static final byte[] EAP_AKA_PRIME_REQUEST =
320             hexStringToByteArray("01" + ID + "000832050000");
321     public static final byte[] EAP_AKA_PRIME_CLIENT_ERROR_UNABLE_TO_PROCESS =
322             hexStringToByteArray("02" + ID + "000C320E000016010000");
323     public static final String EAP_AKA_PRIME_IDENTITY = "36313233343536373839303132333435";
324     public static final byte[] EAP_AKA_PRIME_IDENTITY_BYTES =
325             hexStringToByteArray(EAP_AKA_PRIME_IDENTITY);
326     public static final byte[] EAP_AKA_PRIME_IDENTITY_RESPONSE =
327             hexStringToByteArray(
328                     "02" + ID + "001C" // EAP-Response | ID | length in bytes
329                             + "32050000" // EAP-AKA' | Identity | 2B padding
330                             + "0E050010" + EAP_AKA_PRIME_IDENTITY); // AT_IDENTITY ("6" + IMSI)
331     public static final byte[] EAP_AKA_PRIME_AUTHENTICATION_REJECT =
332             hexStringToByteArray(
333                     "02" + ID + "0008" // EAP-Response | ID | length in bytes
334                             + "32020000"); // EAP-AKA' | Authentication Reject | 2B padding
335 
336     // EAP-TTLS test vectors
337     public static final String EAP_DUMMY_REQUEST = "011000051A";
338     public static final String EAP_DUMMY_RESPONSE = "021000051A";
339     public static final String EAP_TTLS_DUMMY_DATA =
340             "17010160301000E050010a516030100a010000a151603010036313233343"
341                     + "5363738393031323334003A31316030100a55a51603320500000100a516030100a50";
342     public static final String EAP_TTLS_DUMMY_DATA_INITIAL_FRAGMENT =
343             "36313233343536373839303132333435030100a010000a151603010036313"
344                     + "2333435363738393031323334003A31316030100a55a51603320500000100a51603";
345     public static final String EAP_TTLS_DUMMY_DATA_FINAL_FRAGMENT =
346             "010000a10E050010320200000000000000000000";
347     public static final String EAP_TTLS_DUMMY_DATA_ASSEMBLED_FRAGMENT =
348             EAP_TTLS_DUMMY_DATA_INITIAL_FRAGMENT + EAP_TTLS_DUMMY_DATA_FINAL_FRAGMENT;
349 
350     public static final byte[] EAP_DUMMY_REQUEST_BYTES = hexStringToByteArray(EAP_DUMMY_REQUEST);
351     public static final byte[] EAP_DUMMY_RESPONSE_BYTES = hexStringToByteArray(EAP_DUMMY_RESPONSE);
352     public static final byte[] EAP_TTLS_DUMMY_DATA_BYTES =
353             hexStringToByteArray(EAP_TTLS_DUMMY_DATA);
354     public static final byte[] EAP_TTLS_DUMMY_DATA_ASSEMBLED_FRAGMENT_BYTES =
355             hexStringToByteArray(EAP_TTLS_DUMMY_DATA_ASSEMBLED_FRAGMENT);
356     public static final byte[] EAP_TTLS_DUMMY_DATA_INITIAL_FRAGMENT_BYTES =
357             hexStringToByteArray(EAP_TTLS_DUMMY_DATA_INITIAL_FRAGMENT);
358     public static final byte[] EAP_TTLS_DUMMY_DATA_FINAL_FRAGMENT_BYTES =
359             hexStringToByteArray(EAP_TTLS_DUMMY_DATA_FINAL_FRAGMENT);
360 
361     public static final byte[] EAP_REQUEST_TTLS_START =
362             hexStringToByteArray(
363                     "01" + ID + "0006" // EAP-REQUEST | ID | length in bytes
364                             + "1520"); // EAP-TTLS | flags
365     public static final byte[] EAP_RESPONSE_TTLS_WITH_LENGTH =
366             hexStringToByteArray(
367                     "02" + ID + "004A" // EAP-RESPONSE | ID | length in bytes
368                             + "158000000040" // EAP-TTLS | flags | message length in bytes
369                             + EAP_TTLS_DUMMY_DATA);
370     public static final byte[] EAP_RESPONSE_TTLS_WITHOUT_LENGTH =
371             hexStringToByteArray(
372                     "02" + ID + "0046" // EAP-RESPONSE | ID | length in bytes
373                             + "1500" // EAP-TTLS | flags
374                             + EAP_TTLS_DUMMY_DATA);
375     public static final byte[] EAP_RESPONSE_TTLS_INITIAL_FRAGMENT =
376             hexStringToByteArray(
377                     "02" + ID + "004A" // EAP-RESPONSE | ID | length in bytes
378                             + "15C000000054" // EAP-TTLS | flags | message length in bytes
379                             + EAP_TTLS_DUMMY_DATA_INITIAL_FRAGMENT);
380     public static final byte[] EAP_RESPONSE_TTLS_FINAL_FRAGMENT =
381             hexStringToByteArray(
382                     "02" + ID + "001A" // EAP-RESPONSE | ID | length in bytes
383                             + "1500" // EAP-TTLS | flags
384                             + EAP_TTLS_DUMMY_DATA_FINAL_FRAGMENT);
385     public static final byte[] EAP_RESPONSE_TTLS_ACK =
386             hexStringToByteArray(
387                     "02" + ID + "0006" // EAP-RESPONSE | ID | length in bytes
388                             + "1500"); // EAP-TTLS | flags
389     public static final byte[] EAP_MESSAGE_AVP_EAP_REQUEST =
390             hexStringToByteArray(
391                     "0000004F"
392                             + "40"
393                             + "00000D" // AVP Code | AVP Flags | Avp Length
394                             + EAP_DUMMY_REQUEST // EAP-REQUEST
395                             + "000000"); // Padding
396     public static final byte[] EAP_MESSAGE_AVP_EAP_RESPONSE =
397             hexStringToByteArray(
398                     "0000004F"
399                             + "40"
400                             + "00000D" // AVP Code | AVP Flags | Avp Length
401                             + EAP_DUMMY_RESPONSE // EAP-RESPONSE
402                             + "000000"); // Padding
403 }
404