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1 | //----------------------------------------------------------------------------- | |
2 | // Copyright (C) 2010 iZsh <izsh at fail0verflow.com> | |
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 | // High frequency ISO14443B commands | |
9 | //----------------------------------------------------------------------------- | |
10 | ||
11 | #include <stdio.h> | |
12 | #include <stdlib.h> | |
13 | #include <stdbool.h> | |
14 | #include <string.h> | |
15 | #include <stdint.h> | |
16 | #include "iso14443crc.h" | |
17 | #include "proxmark3.h" | |
18 | #include "data.h" | |
19 | #include "graph.h" | |
20 | #include "util.h" | |
21 | #include "ui.h" | |
22 | #include "cmdparser.h" | |
23 | #include "cmdhf14b.h" | |
24 | #include "cmdmain.h" | |
25 | ||
26 | static int CmdHelp(const char *Cmd); | |
27 | ||
28 | int CmdHF14BDemod(const char *Cmd) | |
29 | { | |
30 | int i, j, iold; | |
31 | int isum, qsum; | |
32 | int outOfWeakAt; | |
33 | bool negateI, negateQ; | |
34 | ||
35 | uint8_t data[256]; | |
36 | int dataLen = 0; | |
37 | ||
38 | // As received, the samples are pairs, correlations against I and Q | |
39 | // square waves. So estimate angle of initial carrier (or just | |
40 | // quadrant, actually), and then do the demod. | |
41 | ||
42 | // First, estimate where the tag starts modulating. | |
43 | for (i = 0; i < GraphTraceLen; i += 2) { | |
44 | if (abs(GraphBuffer[i]) + abs(GraphBuffer[i + 1]) > 40) { | |
45 | break; | |
46 | } | |
47 | } | |
48 | if (i >= GraphTraceLen) { | |
49 | PrintAndLog("too weak to sync"); | |
50 | return 0; | |
51 | } | |
52 | PrintAndLog("out of weak at %d", i); | |
53 | outOfWeakAt = i; | |
54 | ||
55 | // Now, estimate the phase in the initial modulation of the tag | |
56 | isum = 0; | |
57 | qsum = 0; | |
58 | for (; i < (outOfWeakAt + 16); i += 2) { | |
59 | isum += GraphBuffer[i + 0]; | |
60 | qsum += GraphBuffer[i + 1]; | |
61 | } | |
62 | negateI = (isum < 0); | |
63 | negateQ = (qsum < 0); | |
64 | ||
65 | // Turn the correlation pairs into soft decisions on the bit. | |
66 | j = 0; | |
67 | for (i = 0; i < GraphTraceLen / 2; i++) { | |
68 | int si = GraphBuffer[j]; | |
69 | int sq = GraphBuffer[j + 1]; | |
70 | if (negateI) si = -si; | |
71 | if (negateQ) sq = -sq; | |
72 | GraphBuffer[i] = si + sq; | |
73 | j += 2; | |
74 | } | |
75 | GraphTraceLen = i; | |
76 | ||
77 | i = outOfWeakAt / 2; | |
78 | while (GraphBuffer[i] > 0 && i < GraphTraceLen) | |
79 | i++; | |
80 | if (i >= GraphTraceLen) goto demodError; | |
81 | ||
82 | iold = i; | |
83 | while (GraphBuffer[i] < 0 && i < GraphTraceLen) | |
84 | i++; | |
85 | if (i >= GraphTraceLen) goto demodError; | |
86 | if ((i - iold) > 23) goto demodError; | |
87 | ||
88 | PrintAndLog("make it to demod loop"); | |
89 | ||
90 | for (;;) { | |
91 | iold = i; | |
92 | while (GraphBuffer[i] >= 0 && i < GraphTraceLen) | |
93 | i++; | |
94 | if (i >= GraphTraceLen) goto demodError; | |
95 | if ((i - iold) > 6) goto demodError; | |
96 | ||
97 | uint16_t shiftReg = 0; | |
98 | if (i + 20 >= GraphTraceLen) goto demodError; | |
99 | ||
100 | for (j = 0; j < 10; j++) { | |
101 | int soft = GraphBuffer[i] + GraphBuffer[i + 1]; | |
102 | ||
103 | if (abs(soft) < (abs(isum) + abs(qsum)) / 20) { | |
104 | PrintAndLog("weak bit"); | |
105 | } | |
106 | ||
107 | shiftReg >>= 1; | |
108 | if(GraphBuffer[i] + GraphBuffer[i+1] >= 0) { | |
109 | shiftReg |= 0x200; | |
110 | } | |
111 | ||
112 | i+= 2; | |
113 | } | |
114 | ||
115 | if ((shiftReg & 0x200) && !(shiftReg & 0x001)) | |
116 | { | |
117 | // valid data byte, start and stop bits okay | |
118 | PrintAndLog(" %02x", (shiftReg >> 1) & 0xff); | |
119 | data[dataLen++] = (shiftReg >> 1) & 0xff; | |
120 | if (dataLen >= sizeof(data)) { | |
121 | return 0; | |
122 | } | |
123 | } else if (shiftReg == 0x000) { | |
124 | // this is EOF | |
125 | break; | |
126 | } else { | |
127 | goto demodError; | |
128 | } | |
129 | } | |
130 | ||
131 | uint8_t first, second; | |
132 | ComputeCrc14443(CRC_14443_B, data, dataLen-2, &first, &second); | |
133 | PrintAndLog("CRC: %02x %02x (%s)\n", first, second, | |
134 | (first == data[dataLen-2] && second == data[dataLen-1]) ? | |
135 | "ok" : "****FAIL****"); | |
136 | ||
137 | RepaintGraphWindow(); | |
138 | return 0; | |
139 | ||
140 | demodError: | |
141 | PrintAndLog("demod error"); | |
142 | RepaintGraphWindow(); | |
143 | return 0; | |
144 | } | |
145 | ||
146 | int CmdHF14BList(const char *Cmd) | |
147 | { | |
148 | PrintAndLog("Deprecated command, use 'hf list 14b' instead"); | |
149 | ||
150 | return 0; | |
151 | } | |
152 | int CmdHF14BRead(const char *Cmd) | |
153 | { | |
154 | UsbCommand c = {CMD_ACQUIRE_RAW_ADC_SAMPLES_ISO_14443, {strtol(Cmd, NULL, 0), 0, 0}}; | |
155 | SendCommand(&c); | |
156 | return 0; | |
157 | } | |
158 | ||
159 | int CmdHF14Sim(const char *Cmd) | |
160 | { | |
161 | UsbCommand c={CMD_SIMULATE_TAG_ISO_14443}; | |
162 | SendCommand(&c); | |
163 | return 0; | |
164 | } | |
165 | ||
166 | int CmdHFSimlisten(const char *Cmd) | |
167 | { | |
168 | UsbCommand c = {CMD_SIMULATE_TAG_HF_LISTEN}; | |
169 | SendCommand(&c); | |
170 | return 0; | |
171 | } | |
172 | ||
173 | int CmdHF14BSnoop(const char *Cmd) | |
174 | { | |
175 | UsbCommand c = {CMD_SNOOP_ISO_14443}; | |
176 | SendCommand(&c); | |
177 | return 0; | |
178 | } | |
179 | ||
180 | /* New command to read the contents of a SRI512 tag | |
181 | * SRI512 tags are ISO14443-B modulated memory tags, | |
182 | * this command just dumps the contents of the memory | |
183 | */ | |
184 | int CmdSri512Read(const char *Cmd) | |
185 | { | |
186 | UsbCommand c = {CMD_READ_SRI512_TAG, {strtol(Cmd, NULL, 0), 0, 0}}; | |
187 | SendCommand(&c); | |
188 | return 0; | |
189 | } | |
190 | ||
191 | /* New command to read the contents of a SRIX4K tag | |
192 | * SRIX4K tags are ISO14443-B modulated memory tags, | |
193 | * this command just dumps the contents of the memory/ | |
194 | */ | |
195 | int CmdSrix4kRead(const char *Cmd) | |
196 | { | |
197 | UsbCommand c = {CMD_READ_SRIX4K_TAG, {strtol(Cmd, NULL, 0), 0, 0}}; | |
198 | SendCommand(&c); | |
199 | return 0; | |
200 | } | |
201 | ||
202 | int CmdHF14BCmdRaw (const char *cmd) { | |
203 | UsbCommand resp; | |
204 | uint8_t *recv; | |
205 | UsbCommand c = {CMD_ISO_14443B_COMMAND, {0, 0, 0}}; // len,recv? | |
206 | uint8_t reply=1; | |
207 | uint8_t crc=0; | |
208 | uint8_t power=0; | |
209 | char buf[5]=""; | |
210 | int i=0; | |
211 | uint8_t data[100] = {0x00}; | |
212 | unsigned int datalen=0, temp; | |
213 | char *hexout; | |
214 | ||
215 | if (strlen(cmd)<3) { | |
216 | PrintAndLog("Usage: hf 14b raw [-r] [-c] [-p] <0A 0B 0C ... hex>"); | |
217 | PrintAndLog(" -r do not read response"); | |
218 | PrintAndLog(" -c calculate and append CRC"); | |
219 | PrintAndLog(" -p leave the field on after receive"); | |
220 | return 0; | |
221 | } | |
222 | ||
223 | // strip | |
224 | while (*cmd==' ' || *cmd=='\t') cmd++; | |
225 | ||
226 | while (cmd[i]!='\0') { | |
227 | if (cmd[i]==' ' || cmd[i]=='\t') { i++; continue; } | |
228 | if (cmd[i]=='-') { | |
229 | switch (cmd[i+1]) { | |
230 | case 'r': | |
231 | case 'R': | |
232 | reply=0; | |
233 | break; | |
234 | case 'c': | |
235 | case 'C': | |
236 | crc=1; | |
237 | break; | |
238 | case 'p': | |
239 | case 'P': | |
240 | power=1; | |
241 | break; | |
242 | default: | |
243 | PrintAndLog("Invalid option"); | |
244 | return 0; | |
245 | } | |
246 | i+=2; | |
247 | continue; | |
248 | } | |
249 | if ((cmd[i]>='0' && cmd[i]<='9') || | |
250 | (cmd[i]>='a' && cmd[i]<='f') || | |
251 | (cmd[i]>='A' && cmd[i]<='F') ) { | |
252 | buf[strlen(buf)+1]=0; | |
253 | buf[strlen(buf)]=cmd[i]; | |
254 | i++; | |
255 | ||
256 | if (strlen(buf)>=2) { | |
257 | sscanf(buf,"%x",&temp); | |
258 | data[datalen]=(uint8_t)(temp & 0xff); | |
259 | datalen++; | |
260 | *buf=0; | |
261 | } | |
262 | continue; | |
263 | } | |
264 | PrintAndLog("Invalid char on input"); | |
265 | return 1; | |
266 | } | |
267 | if (datalen == 0) | |
268 | { | |
269 | PrintAndLog("Missing data input"); | |
270 | return 0; | |
271 | } | |
272 | if(crc) | |
273 | { | |
274 | uint8_t first, second; | |
275 | ComputeCrc14443(CRC_14443_B, data, datalen, &first, &second); | |
276 | data[datalen++] = first; | |
277 | data[datalen++] = second; | |
278 | } | |
279 | ||
280 | c.arg[0] = datalen; | |
281 | c.arg[1] = reply; | |
282 | c.arg[2] = power; | |
283 | memcpy(c.d.asBytes,data,datalen); | |
284 | ||
285 | SendCommand(&c); | |
286 | ||
287 | if (reply) { | |
288 | if (WaitForResponseTimeout(CMD_ACK,&resp,1000)) { | |
289 | recv = resp.d.asBytes; | |
290 | PrintAndLog("received %i octets",resp.arg[0]); | |
291 | if(!resp.arg[0]) | |
292 | return 0; | |
293 | hexout = (char *)malloc(resp.arg[0] * 3 + 1); | |
294 | if (hexout != NULL) { | |
295 | uint8_t first, second; | |
296 | for (int i = 0; i < resp.arg[0]; i++) { // data in hex | |
297 | sprintf(&hexout[i * 3], "%02X ", recv[i]); | |
298 | } | |
299 | PrintAndLog("%s", hexout); | |
300 | free(hexout); | |
301 | ComputeCrc14443(CRC_14443_B, recv, resp.arg[0]-2, &first, &second); | |
302 | if(recv[resp.arg[0]-2]==first && recv[resp.arg[0]-1]==second) { | |
303 | PrintAndLog("CRC OK"); | |
304 | } else { | |
305 | PrintAndLog("CRC failed"); | |
306 | } | |
307 | } else { | |
308 | PrintAndLog("malloc failed your client has low memory?"); | |
309 | } | |
310 | } else { | |
311 | PrintAndLog("timeout while waiting for reply."); | |
312 | } | |
313 | } // if reply | |
314 | return 0; | |
315 | } | |
316 | ||
317 | int CmdHF14BWrite( const char *Cmd){ | |
318 | ||
319 | /* | |
320 | * For SRIX4K blocks 00 - 7F | |
321 | * hf 14b raw -c -p 09 $srix4kwblock $srix4kwdata | |
322 | * | |
323 | * For SR512 blocks 00 - 0F | |
324 | * hf 14b raw -c -p 09 $sr512wblock $sr512wdata | |
325 | * | |
326 | * Special block FF = otp_lock_reg block. | |
327 | * Data len 4 bytes- | |
328 | */ | |
329 | char cmdp = param_getchar(Cmd, 0); | |
330 | uint8_t blockno = -1; | |
331 | uint8_t data[4] = {0x00}; | |
332 | bool isSrix4k = true; | |
333 | char str[20]; | |
334 | ||
335 | if (strlen(Cmd) < 1 || cmdp == 'h' || cmdp == 'H') { | |
336 | PrintAndLog("Usage: hf 14b write <1|2> <BLOCK> <DATA>"); | |
337 | PrintAndLog(" [1 = SRIX4K]"); | |
338 | PrintAndLog(" [2 = SRI512]"); | |
339 | PrintAndLog(" [BLOCK number depends on tag, special block == FF]"); | |
340 | PrintAndLog(" sample: hf 14b write 1 7F 11223344"); | |
341 | PrintAndLog(" : hf 14b write 1 FF 11223344"); | |
342 | PrintAndLog(" : hf 14b write 2 15 11223344"); | |
343 | PrintAndLog(" : hf 14b write 2 FF 11223344"); | |
344 | return 0; | |
345 | } | |
346 | ||
347 | if ( cmdp == '2' ) | |
348 | isSrix4k = false; | |
349 | ||
350 | //blockno = param_get8(Cmd, 1); | |
351 | ||
352 | if ( param_gethex(Cmd,1, &blockno, 2) ) { | |
353 | PrintAndLog("Block number must include 2 HEX symbols"); | |
354 | return 0; | |
355 | } | |
356 | ||
357 | if ( isSrix4k ){ | |
358 | if ( blockno > 0x7f && blockno != 0xff ){ | |
359 | PrintAndLog("Block number out of range"); | |
360 | return 0; | |
361 | } | |
362 | } else { | |
363 | if ( blockno > 0x0f && blockno != 0xff ){ | |
364 | PrintAndLog("Block number out of range"); | |
365 | return 0; | |
366 | } | |
367 | } | |
368 | ||
369 | if (param_gethex(Cmd, 2, data, 8)) { | |
370 | PrintAndLog("Data must include 8 HEX symbols"); | |
371 | return 0; | |
372 | } | |
373 | ||
374 | if ( blockno == 0xff) | |
375 | PrintAndLog("[%s] Write special block %02X [ %s ]", (isSrix4k)?"SRIX4K":"SRI512" , blockno, sprint_hex(data,4) ); | |
376 | else | |
377 | PrintAndLog("[%s] Write block %02X [ %s ]", (isSrix4k)?"SRIX4K":"SRI512", blockno, sprint_hex(data,4) ); | |
378 | ||
379 | sprintf(str, "-c 09 %02x %02x%02x%02x%02x", blockno, data[0], data[1], data[2], data[3]); | |
380 | ||
381 | CmdHF14BCmdRaw(str); | |
382 | return 0; | |
383 | } | |
384 | ||
385 | static command_t CommandTable[] = | |
386 | { | |
387 | {"help", CmdHelp, 1, "This help"}, | |
388 | {"demod", CmdHF14BDemod, 1, "Demodulate ISO14443 Type B from tag"}, | |
389 | {"list", CmdHF14BList, 0, "[Deprecated] List ISO 14443b history"}, | |
390 | {"read", CmdHF14BRead, 0, "Read HF tag (ISO 14443)"}, | |
391 | {"sim", CmdHF14Sim, 0, "Fake ISO 14443 tag"}, | |
392 | {"simlisten", CmdHFSimlisten, 0, "Get HF samples as fake tag"}, | |
393 | {"snoop", CmdHF14BSnoop, 0, "Eavesdrop ISO 14443"}, | |
394 | {"sri512read", CmdSri512Read, 0, "Read contents of a SRI512 tag"}, | |
395 | {"srix4kread", CmdSrix4kRead, 0, "Read contents of a SRIX4K tag"}, | |
396 | {"raw", CmdHF14BCmdRaw, 0, "Send raw hex data to tag"}, | |
397 | {"write", CmdHF14BWrite, 0, "Write data to a SRI512 | SRIX4K tag"}, | |
398 | {NULL, NULL, 0, NULL} | |
399 | }; | |
400 | ||
401 | int CmdHF14B(const char *Cmd) | |
402 | { | |
403 | CmdsParse(CommandTable, Cmd); | |
404 | return 0; | |
405 | } | |
406 | ||
407 | int CmdHelp(const char *Cmd) | |
408 | { | |
409 | CmdsHelp(CommandTable); | |
410 | return 0; | |
411 | } |