projects / proxmark3-svn / blame
| Commit | Line | Data |
|---|---|---|
| ae3340a0 OM |
1 | //----------------------------------------------------------------------------- |
| 2 | // Copyright (C) 2018 Merlok | |
| 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 | // iso14443-4 mifare commands | |
| 9 | //----------------------------------------------------------------------------- | |
| 10 | ||
| 11 | #include "mifare4.h" | |
| 12 | #include <ctype.h> | |
| 13 | #include <string.h> | |
| 14 | #include "cmdhf14a.h" | |
| 15 | #include "util.h" | |
| 16 | #include "ui.h" | |
| 17 | #include "polarssl/libpcrypto.h" | |
| 18 | ||
| 19 | int MifareAuth4(mf4Session *session, uint8_t *keyn, uint8_t *key, bool activateField, bool leaveSignalON, bool verbose) { | |
| 20 | uint8_t data[257] = {0}; | |
| 21 | int datalen = 0; | |
| 22 | ||
| 23 | uint8_t Rnd1[17] = {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x00}; | |
| 24 | uint8_t Rnd2[17] = {0}; | |
| 25 | ||
| 26 | if (session) | |
| 27 | session->Authenticated = false; | |
| 28 | ||
| 29 | uint8_t cmd1[] = {0x70, keyn[1], keyn[0], 0x00}; | |
| 30 | int res = ExchangeRAW14a(cmd1, sizeof(cmd1), activateField, true, data, sizeof(data), &datalen); | |
| 31 | if (res) { | |
| 32 | PrintAndLog("ERROR exchande raw error: %d", res); | |
| 33 | DropField(); | |
| 34 | return 2; | |
| 35 | } | |
| 36 | ||
| 37 | if (verbose) | |
| 38 | PrintAndLog("<phase1: %s", sprint_hex(data, datalen)); | |
| 39 | ||
| 40 | if (datalen < 1) { | |
| 41 | PrintAndLog("ERROR: card response length: %d", datalen); | |
| 42 | DropField(); | |
| 43 | return 3; | |
| 44 | } | |
| 45 | ||
| 46 | if (data[0] != 0x90) { | |
| 47 | PrintAndLog("ERROR: card response error: %02x", data[2]); | |
| 48 | DropField(); | |
| 49 | return 3; | |
| 50 | } | |
| 51 | ||
| 52 | if (datalen != 19) { // code 1b + 16b + crc 2b | |
| 53 | PrintAndLog("ERROR: card response must be 19 bytes long instead of: %d", datalen); | |
| 54 | DropField(); | |
| 55 | return 3; | |
| 56 | } | |
| 57 | ||
| 58 | aes_decode(NULL, key, &data[1], Rnd2, 16); | |
| 59 | Rnd2[16] = Rnd2[0]; | |
| 60 | if (verbose) | |
| 61 | PrintAndLog("Rnd2: %s", sprint_hex(Rnd2, 16)); | |
| 62 | ||
| 63 | uint8_t cmd2[33] = {0}; | |
| 64 | cmd2[0] = 0x72; | |
| 65 | ||
| 66 | uint8_t raw[32] = {0}; | |
| 67 | memmove(raw, Rnd1, 16); | |
| 68 | memmove(&raw[16], &Rnd2[1], 16); | |
| 69 | ||
| 70 | aes_encode(NULL, key, raw, &cmd2[1], 32); | |
| 71 | if (verbose) | |
| 72 | PrintAndLog(">phase2: %s", sprint_hex(cmd2, 33)); | |
| 73 | ||
| 74 | res = ExchangeRAW14a(cmd2, sizeof(cmd2), false, false, data, sizeof(data), &datalen); | |
| 75 | if (res) { | |
| 76 | PrintAndLog("ERROR exchande raw error: %d", res); | |
| 77 | DropField(); | |
| 78 | return 4; | |
| 79 | } | |
| 80 | ||
| 81 | if (verbose) | |
| 82 | PrintAndLog("<phase2: %s", sprint_hex(data, datalen)); | |
| 83 | ||
| 84 | aes_decode(NULL, key, &data[1], raw, 32); | |
| 85 | ||
| 86 | if (verbose) { | |
| 87 | PrintAndLog("res: %s", sprint_hex(raw, 32)); | |
| 88 | PrintAndLog("Rnd1`: %s", sprint_hex(&raw[4], 16)); | |
| 89 | } | |
| 90 | ||
| 91 | if (memcmp(&raw[4], &Rnd1[1], 16)) { | |
| 92 | PrintAndLog("\nERROR: Authentication FAILED. rnd not equal"); | |
| 93 | if (verbose) { | |
| 94 | PrintAndLog("rnd1 reader: %s", sprint_hex(&Rnd1[1], 16)); | |
| 95 | PrintAndLog("rnd1 card: %s", sprint_hex(&raw[4], 16)); | |
| 96 | } | |
| 97 | DropField(); | |
| 98 | return 5; | |
| 99 | } | |
| 100 | ||
| 101 | if (!leaveSignalON) | |
| 102 | DropField(); | |
| 103 | ||
| 104 | if (verbose) | |
| 105 | PrintAndLog(""); | |
| 106 | ||
| 107 | if (session) { | |
| 108 | session->Authenticated = true; | |
| 109 | session->KeyNum = keyn[1] + (keyn[0] << 8); | |
| 110 | memmove(session->Rnd1, Rnd1, 16); | |
| 111 | memmove(session->Rnd2, Rnd2, 16); | |
| 112 | } | |
| 113 | ||
| 114 | PrintAndLog("Authentication OK"); | |
| 115 | ||
| 116 | return 0; | |
| 117 | } | |
| 118 |