mock of key checking
[proxmark3-svn] / client / cmdhflist.c
CommitLineData
4f131b53 1//-----------------------------------------------------------------------------
2// Copyright (C) Merlok - 2017
3//
4// This code is licensed to you under the terms of the GNU GPL, version 2 or,
5// at your option, any later version. See the LICENSE.txt file for the text of
6// the license.
7//-----------------------------------------------------------------------------
8// Command: hf mf list. It shows data from arm buffer.
9//-----------------------------------------------------------------------------
10
11#include "cmdhflist.h"
12
13#include <stdlib.h>
14#include <stdio.h>
15#include <string.h>
6612a5a2 16#include <stdint.h>
17#include <stdbool.h>
18#include "util.h"
19#include "data.h"
20#include "ui.h"
21#include "iso14443crc.h"
22#include "parity.h"
23#include "protocols.h"
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24#include "crapto1/crapto1.h"
25#include "mifarehost.h"
c6a886fb 26#include "mifaredefault.h"
4f131b53 27
28
6612a5a2 29enum MifareAuthSeq {
30 masNone,
31 masNt,
32 masNrAr,
33 masAt,
747885a6 34 masAuthComplete,
aadc6bf1 35 masFirstData,
6612a5a2 36 masData,
6612a5a2 37 masError,
38};
39static enum MifareAuthSeq MifareAuthState;
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40static TAuthData AuthData;
41
42void ClearAuthData() {
43 AuthData.uid = 0;
44 AuthData.nt = 0;
7b215d14 45 AuthData.first_auth = true;
aadc6bf1 46}
6612a5a2 47
48/**
49 * @brief iso14443A_CRC_check Checks CRC in command or response
50 * @param isResponse
51 * @param data
52 * @param len
53 * @return 0 : CRC-command, CRC not ok
54 * 1 : CRC-command, CRC ok
55 * 2 : Not crc-command
56 */
57uint8_t iso14443A_CRC_check(bool isResponse, uint8_t* data, uint8_t len)
58{
59 uint8_t b1,b2;
60
61 if(len <= 2) return 2;
62
63 if(isResponse & (len < 6)) return 2;
64
65 ComputeCrc14443(CRC_14443_A, data, len-2, &b1, &b2);
66 if (b1 != data[len-2] || b2 != data[len-1]) {
67 return 0;
68 } else {
69 return 1;
70 }
71}
72
73uint8_t mifare_CRC_check(bool isResponse, uint8_t* data, uint8_t len)
74{
75 switch(MifareAuthState) {
76 case masNone:
6612a5a2 77 case masError:
78 return iso14443A_CRC_check(isResponse, data, len);
79 default:
80 return 2;
81 }
6612a5a2 82}
83
84void annotateIso14443a(char *exp, size_t size, uint8_t* cmd, uint8_t cmdsize)
85{
86 switch(cmd[0])
87 {
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88 case ISO14443A_CMD_WUPA:
89 snprintf(exp,size,"WUPA");
90 MifareAuthState = masNone;
91 break;
6612a5a2 92 case ISO14443A_CMD_ANTICOLL_OR_SELECT:{
93 // 93 20 = Anticollision (usage: 9320 - answer: 4bytes UID+1byte UID-bytes-xor)
94 // 93 70 = Select (usage: 9370+5bytes 9320 answer - answer: 1byte SAK)
95 if(cmd[1] == 0x70)
96 {
97 snprintf(exp,size,"SELECT_UID"); break;
98 }else
99 {
100 snprintf(exp,size,"ANTICOLL"); break;
101 }
102 }
103 case ISO14443A_CMD_ANTICOLL_OR_SELECT_2:{
104 //95 20 = Anticollision of cascade level2
105 //95 70 = Select of cascade level2
106 if(cmd[2] == 0x70)
107 {
108 snprintf(exp,size,"SELECT_UID-2"); break;
109 }else
110 {
111 snprintf(exp,size,"ANTICOLL-2"); break;
112 }
113 }
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114 case ISO14443A_CMD_REQA:
115 snprintf(exp,size,"REQA");
116 MifareAuthState = masNone;
117 break;
6612a5a2 118 case ISO14443A_CMD_READBLOCK: snprintf(exp,size,"READBLOCK(%d)",cmd[1]); break;
119 case ISO14443A_CMD_WRITEBLOCK: snprintf(exp,size,"WRITEBLOCK(%d)",cmd[1]); break;
120 case ISO14443A_CMD_HALT:
121 snprintf(exp,size,"HALT");
122 MifareAuthState = masNone;
123 break;
124 case ISO14443A_CMD_RATS: snprintf(exp,size,"RATS"); break;
125 case MIFARE_CMD_INC: snprintf(exp,size,"INC(%d)",cmd[1]); break;
126 case MIFARE_CMD_DEC: snprintf(exp,size,"DEC(%d)",cmd[1]); break;
127 case MIFARE_CMD_RESTORE: snprintf(exp,size,"RESTORE(%d)",cmd[1]); break;
128 case MIFARE_CMD_TRANSFER: snprintf(exp,size,"TRANSFER(%d)",cmd[1]); break;
129 case MIFARE_AUTH_KEYA:
130 if ( cmdsize > 3) {
131 snprintf(exp,size,"AUTH-A(%d)",cmd[1]);
132 MifareAuthState = masNt;
133 } else {
134 // case MIFARE_ULEV1_VERSION : both 0x60.
135 snprintf(exp,size,"EV1 VERSION");
136 }
137 break;
138 case MIFARE_AUTH_KEYB:
139 MifareAuthState = masNt;
140 snprintf(exp,size,"AUTH-B(%d)",cmd[1]);
141 break;
142 case MIFARE_MAGICWUPC1: snprintf(exp,size,"MAGIC WUPC1"); break;
143 case MIFARE_MAGICWUPC2: snprintf(exp,size,"MAGIC WUPC2"); break;
144 case MIFARE_MAGICWIPEC: snprintf(exp,size,"MAGIC WIPEC"); break;
145 case MIFARE_ULC_AUTH_1: snprintf(exp,size,"AUTH "); break;
146 case MIFARE_ULC_AUTH_2: snprintf(exp,size,"AUTH_ANSW"); break;
147 case MIFARE_ULEV1_AUTH:
148 if ( cmdsize == 7 )
149 snprintf(exp,size,"PWD-AUTH KEY: 0x%02x%02x%02x%02x", cmd[1], cmd[2], cmd[3], cmd[4] );
150 else
151 snprintf(exp,size,"PWD-AUTH");
152 break;
153 case MIFARE_ULEV1_FASTREAD:{
154 if ( cmdsize >=3 && cmd[2] <= 0xE6)
155 snprintf(exp,size,"READ RANGE (%d-%d)",cmd[1],cmd[2]);
156 else
157 snprintf(exp,size,"?");
158 break;
159 }
160 case MIFARE_ULC_WRITE:{
161 if ( cmd[1] < 0x21 )
162 snprintf(exp,size,"WRITEBLOCK(%d)",cmd[1]);
163 else
164 snprintf(exp,size,"?");
165 break;
166 }
167 case MIFARE_ULEV1_READ_CNT:{
168 if ( cmd[1] < 5 )
169 snprintf(exp,size,"READ CNT(%d)",cmd[1]);
170 else
171 snprintf(exp,size,"?");
172 break;
173 }
174 case MIFARE_ULEV1_INCR_CNT:{
175 if ( cmd[1] < 5 )
176 snprintf(exp,size,"INCR(%d)",cmd[1]);
177 else
178 snprintf(exp,size,"?");
179 break;
180 }
181 case MIFARE_ULEV1_READSIG: snprintf(exp,size,"READ_SIG"); break;
182 case MIFARE_ULEV1_CHECKTEAR: snprintf(exp,size,"CHK_TEARING(%d)",cmd[1]); break;
183 case MIFARE_ULEV1_VCSL: snprintf(exp,size,"VCSL"); break;
184 default: snprintf(exp,size,"?"); break;
185 }
186 return;
187}
188
b957bcd3 189void annotateMifare(char *exp, size_t size, uint8_t* cmd, uint8_t cmdsize, uint8_t* parity, uint8_t paritysize, bool isResponse) {
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190 // get UID
191 if (MifareAuthState == masNone) {
7b215d14 192 if (cmdsize == 9 && cmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT && cmd[1] == 0x70) {
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193 ClearAuthData();
194 AuthData.uid = bytes_to_num(&cmd[2], 4);
195 }
7b215d14 196 if (cmdsize == 9 && cmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT_2 && cmd[1] == 0x70) {
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197 ClearAuthData();
198 AuthData.uid = bytes_to_num(&cmd[2], 4);
199 }
200 }
201
6612a5a2 202 switch(MifareAuthState) {
203 case masNt:
fb30f5a1 204 if (cmdsize == 4 && isResponse) {
aadc6bf1 205 snprintf(exp,size,"AUTH: nt %s", (AuthData.first_auth) ? "" : "(enc)");
6612a5a2 206 MifareAuthState = masNrAr;
aadc6bf1 207 if (AuthData.first_auth)
7b215d14 208 AuthData.nt = bytes_to_num(cmd, 4);
aadc6bf1 209 else
7b215d14 210 AuthData.nt_enc = bytes_to_num(cmd, 4);
b957bcd3 211 AuthData.nt_enc_par = parity[0];
6612a5a2 212 return;
213 } else {
214 MifareAuthState = masError;
6612a5a2 215 }
216 break;
217 case masNrAr:
fb30f5a1 218 if (cmdsize == 8 && !isResponse) {
6c30a244 219 snprintf(exp,size,"AUTH: nr ar (enc)");
6612a5a2 220 MifareAuthState = masAt;
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221 AuthData.nr_enc = bytes_to_num(cmd, 4);
222 AuthData.ar_enc = bytes_to_num(&cmd[4], 4);
b957bcd3 223 AuthData.ar_enc_par = parity[0] << 4;
6612a5a2 224 return;
225 } else {
226 MifareAuthState = masError;
227 }
228 break;
229 case masAt:
fb30f5a1 230 if (cmdsize == 4 && isResponse) {
6c30a244 231 snprintf(exp,size,"AUTH: at (enc)");
747885a6 232 MifareAuthState = masAuthComplete;
7b215d14 233 AuthData.at_enc = bytes_to_num(cmd, 4);
b957bcd3 234 AuthData.at_enc_par = parity[0];
6612a5a2 235 return;
236 } else {
237 MifareAuthState = masError;
238 }
239 break;
240 default:
241 break;
242 }
243
747885a6 244 if (!isResponse && ((MifareAuthState == masNone) || (MifareAuthState == masError)))
6612a5a2 245 annotateIso14443a(exp, size, cmd, cmdsize);
246
247}
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248
249bool DecodeMifareData(uint8_t *cmd, uint8_t cmdsize, bool isResponse, uint8_t *mfData, size_t *mfDataLen) {
747885a6 250 static struct Crypto1State *traceCrypto1;
dca8220f 251 static uint64_t mfLastKey;
747885a6 252
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253 *mfDataLen = 0;
254
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255 if (MifareAuthState == masAuthComplete) {
256 if (traceCrypto1) {
257 crypto1_destroy(traceCrypto1);
258 }
259
260 MifareAuthState = masFirstData;
261 return false;
262 }
263
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264 if (cmdsize > 32)
265 return false;
266
267 if (MifareAuthState == masFirstData) {
268 if (AuthData.first_auth) {
269 uint32_t ks2 = AuthData.ar_enc ^ prng_successor(AuthData.nt, 64);
270 uint32_t ks3 = AuthData.at_enc ^ prng_successor(AuthData.nt, 96);
271 struct Crypto1State *revstate = lfsr_recovery64(ks2, ks3);
272 lfsr_rollback_word(revstate, 0, 0);
273 lfsr_rollback_word(revstate, 0, 0);
274 lfsr_rollback_word(revstate, AuthData.nr_enc, 1);
275 lfsr_rollback_word(revstate, AuthData.uid ^ AuthData.nt, 0);
276
277 uint64_t lfsr = 0;
278 crypto1_get_lfsr(revstate, &lfsr);
279 crypto1_destroy(revstate);
747885a6 280 mfLastKey = lfsr;
28ee794f 281 PrintAndLog(" | * | key | probable key:%x%x Prng:%s ks2:%08x ks3:%08x | |",
7b215d14 282 (unsigned int)((lfsr & 0xFFFFFFFF00000000) >> 32), (unsigned int)(lfsr & 0xFFFFFFFF),
28ee794f 283 validate_prng_nonce(AuthData.nt) ? "WEAK": "HARD",
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284 ks2,
285 ks3);
286
287 AuthData.first_auth = false;
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288
289 traceCrypto1 = lfsr_recovery64(ks2, ks3);
7b215d14 290 } else {
28ee794f 291 printf("uid:%x nt:%x ar_enc:%x at_enc:%x\n", AuthData.uid, AuthData.nt, AuthData.ar_enc, AuthData.at_enc);
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292
293 // check last used key
294 if (mfLastKey) {
c6a886fb
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295 if (NestedCheckKey(mfLastKey, &AuthData, cmd, cmdsize)) {
296 };
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297 }
298
299 // check default keys
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300 for (int defaultKeyCounter = 0; defaultKeyCounter < MifareDefaultKeysSize; defaultKeyCounter++){
301 if (NestedCheckKey(MifareDefaultKeys[defaultKeyCounter], &AuthData, cmd, cmdsize)) {
302
303 break;
304 };
305 }
747885a6
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306
307 // nested
308 if (validate_prng_nonce(AuthData.nt)) {
309 }
310
311 //hardnested
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312 }
313
314
315
316 MifareAuthState = masData;
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317 }
318
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319 if (MifareAuthState == masData && traceCrypto1) {
320 memcpy(mfData, cmd, cmdsize);
321 mf_crypto1_decrypt(traceCrypto1, mfData, cmdsize, 0);
322 *mfDataLen = cmdsize;
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OM
323 }
324
325 return *mfDataLen > 0;
326}
327
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328bool NTParityChk(TAuthData *ad, uint32_t ntx) {
329 if (
330 (oddparity8(ntx >> 8 & 0xff) ^ (ntx & 0x01) ^ ((ad->nt_enc_par >> 5) & 0x01) ^ (ad->nt_enc & 0x01)) ||
331 (oddparity8(ntx >> 16 & 0xff) ^ (ntx >> 8 & 0x01) ^ ((ad->nt_enc_par >> 6) & 0x01) ^ (ad->nt_enc >> 8 & 0x01)) ||
332 (oddparity8(ntx >> 24 & 0xff) ^ (ntx >> 16 & 0x01) ^ ((ad->nt_enc_par >> 7) & 0x01) ^ (ad->nt_enc >> 16 & 0x01))
333 )
334 return false;
335
336 uint32_t ar = prng_successor(ntx, 64);
337 if (
338 (oddparity8(ar >> 8 & 0xff) ^ (ar & 0x01) ^ ((ad->ar_enc_par >> 5) & 0x01) ^ (ad->ar_enc & 0x01)) ||
339 (oddparity8(ar >> 16 & 0xff) ^ (ar >> 8 & 0x01) ^ ((ad->ar_enc_par >> 6) & 0x01) ^ (ad->ar_enc >> 8 & 0x01)) ||
340 (oddparity8(ar >> 24 & 0xff) ^ (ar >> 16 & 0x01) ^ ((ad->ar_enc_par >> 7) & 0x01) ^ (ad->ar_enc >> 16 & 0x01))
341 )
342 return false;
343
344 uint32_t at = prng_successor(ntx, 96);
345 if (
346 (oddparity8(ar & 0xff) ^ (at >> 24 & 0x01) ^ ((ad->ar_enc_par >> 4) & 0x01) ^ (ad->at_enc >> 24 & 0x01)) ||
347 (oddparity8(at >> 8 & 0xff) ^ (at & 0x01) ^ ((ad->at_enc_par >> 5) & 0x01) ^ (ad->at_enc & 0x01)) ||
348 (oddparity8(at >> 16 & 0xff) ^ (at >> 8 & 0x01) ^ ((ad->at_enc_par >> 6) & 0x01) ^ (ad->at_enc >> 8 & 0x01)) ||
349 (oddparity8(at >> 24 & 0xff) ^ (at >> 16 & 0x01) ^ ((ad->at_enc_par >> 7) & 0x01) ^ (ad->at_enc >> 16 & 0x01))
350 )
351 return false;
352
353 return true;
354}
355
c6a886fb 356bool NestedCheckKey(uint64_t key, TAuthData *ad, uint8_t *cmd, uint8_t cmdsize) {
dca8220f
OM
357 uint8_t buf[32] = {0};
358 struct Crypto1State *pcs;
359
360 pcs = crypto1_create(key);
361 uint32_t nt1 = crypto1_word(pcs, ad->nt_enc ^ ad->uid, 1) ^ ad->nt_enc;
362 uint32_t ar = prng_successor(nt1, 64);
363 uint32_t at = prng_successor(nt1, 96);
364 printf("key> nested auth uid: %08x nt: %08x nt_parity: %s ar: %08x at: %08x\n", ad->uid, nt1, printBitsPar(&ad->nt_enc_par, 4), ar, at);
365 uint32_t nr1 = crypto1_word(pcs, ad->nr_enc, 1) ^ ad->nr_enc;
366 uint32_t ar1 = crypto1_word(pcs, 0, 0) ^ ad->ar_enc;
367 uint32_t at1 = crypto1_word(pcs, 0, 0) ^ ad->at_enc;
368 printf("key> the same key test. nr1: %08x ar1: %08x at1: %08x \n", nr1, ar1, at1);
369
370 if (NTParityChk(ad, nt1))
371 printf("key> the same key test OK. key=%x%x\n", (unsigned int)((key & 0xFFFFFFFF00000000) >> 32), (unsigned int)(key & 0xFFFFFFFF));
372 else {
373 printf("key> the same key test. check nt parity error.\n");
374 return false;
375 }
376
377 memcpy(buf, cmd, cmdsize);
378 mf_crypto1_decrypt(pcs, buf, cmdsize, 0);
379
380 return CheckCrc14443(CRC_14443_A, buf, cmdsize);
c6a886fb 381}
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