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1 //-----------------------------------------------------------------------------
2 // Copyright (C) 2012 Frederik Möllers
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 // Commands related to the German electronic Identification Card
9 //-----------------------------------------------------------------------------
10
11 #include "util.h"
12 #include "proxusb.h"
13 #include "proxmark3.h"
14 #include "ui.h"
15 #include "cmdparser.h"
16 #include "common.h"
17 #include "cmdmain.h"
18 #include "sleep.h"
19
20 #include "cmdhfepa.h"
21
22 static int CmdHelp(const char *Cmd);
23
24 // Perform (part of) the PACE protocol
25 int CmdHFEPACollectPACENonces(const char *Cmd)
26 {
27 // requested nonce size
28 uint8_t m = 0;
29 // requested number of Nonces
30 unsigned int n = 0;
31 // delay between requests
32 unsigned int d = 0;
33
34 sscanf(Cmd, "%hhu %u %u", &m, &n, &d);
35
36 // values are expected to be > 0
37 m = m > 0 ? m : 1;
38 n = n > 0 ? n : 1;
39
40 PrintAndLog("Collecting %u %hhu-byte nonces", n, m);
41 PrintAndLog("Start: %u", time(NULL));
42 // repeat n times
43 for (unsigned int i = 0; i < n; i++) {
44 // execute PACE
45 UsbCommand c = {CMD_EPA_PACE_COLLECT_NONCE, {(int)m, 0, 0}};
46 SendCommand(&c);
47 UsbCommand resp;
48
49 WaitForResponse(CMD_ACK,&resp);
50
51 // check if command failed
52 if (resp.arg[0] != 0) {
53 PrintAndLog("Error in step %d, Return code: %d",resp.arg[0],(int)resp.arg[1]);
54 } else {
55 size_t nonce_length = resp.arg[1];
56 char *nonce = (char *) malloc(2 * nonce_length + 1);
57 for(int j = 0; j < nonce_length; j++) {
58 snprintf(nonce + (2 * j), 3, "%02X", resp.d.asBytes[j]);
59 }
60 // print nonce
61 PrintAndLog("Length: %d, Nonce: %s",resp.arg[1], nonce);
62 }
63 if (i < n - 1) {
64 sleep(d);
65 }
66 }
67 PrintAndLog("End: %u", time(NULL));
68
69 return 1;
70 }
71
72 // UI-related stuff
73
74 static const command_t CommandTable[] =
75 {
76 {"help", CmdHelp, 1, "This help"},
77 {"cnonces", CmdHFEPACollectPACENonces, 0,
78 "<m> <n> <d> Acquire n>0 encrypted PACE nonces of size m>0 with d sec pauses"},
79 {NULL, NULL, 0, NULL}
80 };
81
82 int CmdHelp(const char *Cmd)
83 {
84 CmdsHelp(CommandTable);
85 return 0;
86 }
87
88 int CmdHFEPA(const char *Cmd)
89 {
90 // flush
91 while (!WaitForResponseTimeout(CMD_ACK,NULL,500));
92
93 // parse
94 CmdsParse(CommandTable, Cmd);
95 return 0;
96 }
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