#include <stdlib.h>
#include <stdio.h>
#include <string.h>
+#include <stdint.h>
+#include <stdbool.h>
+#include "util.h"
+#include "data.h"
+#include "ui.h"
+#include "iso14443crc.h"
+#include "parity.h"
+#include "protocols.h"
+#include "crapto1/crapto1.h"
+#include "mifarehost.h"
+enum MifareAuthSeq {
+ masNone,
+ masNt,
+ masNrAr,
+ masAt,
+ masAuthComplete,
+ masFirstData,
+ masData,
+ masError,
+};
+static enum MifareAuthSeq MifareAuthState;
+static TAuthData AuthData;
+
+void ClearAuthData() {
+ AuthData.uid = 0;
+ AuthData.nt = 0;
+ AuthData.first_auth = true;
+}
+
+/**
+ * @brief iso14443A_CRC_check Checks CRC in command or response
+ * @param isResponse
+ * @param data
+ * @param len
+ * @return 0 : CRC-command, CRC not ok
+ * 1 : CRC-command, CRC ok
+ * 2 : Not crc-command
+ */
+uint8_t iso14443A_CRC_check(bool isResponse, uint8_t* data, uint8_t len)
+{
+ uint8_t b1,b2;
+
+ if(len <= 2) return 2;
+
+ if(isResponse & (len < 6)) return 2;
+
+ ComputeCrc14443(CRC_14443_A, data, len-2, &b1, &b2);
+ if (b1 != data[len-2] || b2 != data[len-1]) {
+ return 0;
+ } else {
+ return 1;
+ }
+}
+
+uint8_t mifare_CRC_check(bool isResponse, uint8_t* data, uint8_t len)
+{
+ switch(MifareAuthState) {
+ case masNone:
+ case masError:
+ return iso14443A_CRC_check(isResponse, data, len);
+ default:
+ return 2;
+ }
+}
+
+void annotateIso14443a(char *exp, size_t size, uint8_t* cmd, uint8_t cmdsize)
+{
+ switch(cmd[0])
+ {
+ case ISO14443A_CMD_WUPA:
+ snprintf(exp,size,"WUPA");
+ MifareAuthState = masNone;
+ break;
+ case ISO14443A_CMD_ANTICOLL_OR_SELECT:{
+ // 93 20 = Anticollision (usage: 9320 - answer: 4bytes UID+1byte UID-bytes-xor)
+ // 93 70 = Select (usage: 9370+5bytes 9320 answer - answer: 1byte SAK)
+ if(cmd[1] == 0x70)
+ {
+ snprintf(exp,size,"SELECT_UID"); break;
+ }else
+ {
+ snprintf(exp,size,"ANTICOLL"); break;
+ }
+ }
+ case ISO14443A_CMD_ANTICOLL_OR_SELECT_2:{
+ //95 20 = Anticollision of cascade level2
+ //95 70 = Select of cascade level2
+ if(cmd[2] == 0x70)
+ {
+ snprintf(exp,size,"SELECT_UID-2"); break;
+ }else
+ {
+ snprintf(exp,size,"ANTICOLL-2"); break;
+ }
+ }
+ case ISO14443A_CMD_REQA:
+ snprintf(exp,size,"REQA");
+ MifareAuthState = masNone;
+ break;
+ case ISO14443A_CMD_READBLOCK: snprintf(exp,size,"READBLOCK(%d)",cmd[1]); break;
+ case ISO14443A_CMD_WRITEBLOCK: snprintf(exp,size,"WRITEBLOCK(%d)",cmd[1]); break;
+ case ISO14443A_CMD_HALT:
+ snprintf(exp,size,"HALT");
+ MifareAuthState = masNone;
+ break;
+ case ISO14443A_CMD_RATS: snprintf(exp,size,"RATS"); break;
+ case MIFARE_CMD_INC: snprintf(exp,size,"INC(%d)",cmd[1]); break;
+ case MIFARE_CMD_DEC: snprintf(exp,size,"DEC(%d)",cmd[1]); break;
+ case MIFARE_CMD_RESTORE: snprintf(exp,size,"RESTORE(%d)",cmd[1]); break;
+ case MIFARE_CMD_TRANSFER: snprintf(exp,size,"TRANSFER(%d)",cmd[1]); break;
+ case MIFARE_AUTH_KEYA:
+ if ( cmdsize > 3) {
+ snprintf(exp,size,"AUTH-A(%d)",cmd[1]);
+ MifareAuthState = masNt;
+ } else {
+ // case MIFARE_ULEV1_VERSION : both 0x60.
+ snprintf(exp,size,"EV1 VERSION");
+ }
+ break;
+ case MIFARE_AUTH_KEYB:
+ MifareAuthState = masNt;
+ snprintf(exp,size,"AUTH-B(%d)",cmd[1]);
+ break;
+ case MIFARE_MAGICWUPC1: snprintf(exp,size,"MAGIC WUPC1"); break;
+ case MIFARE_MAGICWUPC2: snprintf(exp,size,"MAGIC WUPC2"); break;
+ case MIFARE_MAGICWIPEC: snprintf(exp,size,"MAGIC WIPEC"); break;
+ case MIFARE_ULC_AUTH_1: snprintf(exp,size,"AUTH "); break;
+ case MIFARE_ULC_AUTH_2: snprintf(exp,size,"AUTH_ANSW"); break;
+ case MIFARE_ULEV1_AUTH:
+ if ( cmdsize == 7 )
+ snprintf(exp,size,"PWD-AUTH KEY: 0x%02x%02x%02x%02x", cmd[1], cmd[2], cmd[3], cmd[4] );
+ else
+ snprintf(exp,size,"PWD-AUTH");
+ break;
+ case MIFARE_ULEV1_FASTREAD:{
+ if ( cmdsize >=3 && cmd[2] <= 0xE6)
+ snprintf(exp,size,"READ RANGE (%d-%d)",cmd[1],cmd[2]);
+ else
+ snprintf(exp,size,"?");
+ break;
+ }
+ case MIFARE_ULC_WRITE:{
+ if ( cmd[1] < 0x21 )
+ snprintf(exp,size,"WRITEBLOCK(%d)",cmd[1]);
+ else
+ snprintf(exp,size,"?");
+ break;
+ }
+ case MIFARE_ULEV1_READ_CNT:{
+ if ( cmd[1] < 5 )
+ snprintf(exp,size,"READ CNT(%d)",cmd[1]);
+ else
+ snprintf(exp,size,"?");
+ break;
+ }
+ case MIFARE_ULEV1_INCR_CNT:{
+ if ( cmd[1] < 5 )
+ snprintf(exp,size,"INCR(%d)",cmd[1]);
+ else
+ snprintf(exp,size,"?");
+ break;
+ }
+ case MIFARE_ULEV1_READSIG: snprintf(exp,size,"READ_SIG"); break;
+ case MIFARE_ULEV1_CHECKTEAR: snprintf(exp,size,"CHK_TEARING(%d)",cmd[1]); break;
+ case MIFARE_ULEV1_VCSL: snprintf(exp,size,"VCSL"); break;
+ default: snprintf(exp,size,"?"); break;
+ }
+ return;
+}
+
+void annotateMifare(char *exp, size_t size, uint8_t* cmd, uint8_t cmdsize, uint8_t* parity, uint8_t paritysize, bool isResponse) {
+ // get UID
+ if (MifareAuthState == masNone) {
+ if (cmdsize == 9 && cmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT && cmd[1] == 0x70) {
+ ClearAuthData();
+ AuthData.uid = bytes_to_num(&cmd[2], 4);
+ }
+ if (cmdsize == 9 && cmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT_2 && cmd[1] == 0x70) {
+ ClearAuthData();
+ AuthData.uid = bytes_to_num(&cmd[2], 4);
+ }
+ }
+
+ switch(MifareAuthState) {
+ case masNt:
+ if (cmdsize == 4 && isResponse) {
+ snprintf(exp,size,"AUTH: nt %s", (AuthData.first_auth) ? "" : "(enc)");
+ MifareAuthState = masNrAr;
+ if (AuthData.first_auth)
+ AuthData.nt = bytes_to_num(cmd, 4);
+ else
+ AuthData.nt_enc = bytes_to_num(cmd, 4);
+ AuthData.nt_enc_par = parity[0];
+ return;
+ } else {
+ MifareAuthState = masError;
+ }
+ break;
+ case masNrAr:
+ if (cmdsize == 8 && !isResponse) {
+ snprintf(exp,size,"AUTH: nr ar (enc)");
+ MifareAuthState = masAt;
+ AuthData.nr_enc = bytes_to_num(cmd, 4);
+ AuthData.ar_enc = bytes_to_num(&cmd[4], 4);
+ AuthData.ar_enc_par = parity[0] << 4;
+ return;
+ } else {
+ MifareAuthState = masError;
+ }
+ break;
+ case masAt:
+ if (cmdsize == 4 && isResponse) {
+ snprintf(exp,size,"AUTH: at (enc)");
+ MifareAuthState = masAuthComplete;
+ AuthData.at_enc = bytes_to_num(cmd, 4);
+ AuthData.at_enc_par = parity[0];
+ return;
+ } else {
+ MifareAuthState = masError;
+ }
+ break;
+ default:
+ break;
+ }
+
+ if (!isResponse && ((MifareAuthState == masNone) || (MifareAuthState == masError)))
+ annotateIso14443a(exp, size, cmd, cmdsize);
+
+}
+
+bool DecodeMifareData(uint8_t *cmd, uint8_t cmdsize, bool isResponse, uint8_t *mfData, size_t *mfDataLen) {
+ static struct Crypto1State *traceCrypto1;
+ uint64_t mfLastKey;
+
+ *mfDataLen = 0;
+
+ if (MifareAuthState == masAuthComplete) {
+ if (traceCrypto1) {
+ crypto1_destroy(traceCrypto1);
+ }
+
+ MifareAuthState = masFirstData;
+ return false;
+ }
+
+ if (cmdsize > 32)
+ return false;
+
+ if (MifareAuthState == masFirstData) {
+ if (AuthData.first_auth) {
+ uint32_t ks2 = AuthData.ar_enc ^ prng_successor(AuthData.nt, 64);
+ uint32_t ks3 = AuthData.at_enc ^ prng_successor(AuthData.nt, 96);
+ struct Crypto1State *revstate = lfsr_recovery64(ks2, ks3);
+ lfsr_rollback_word(revstate, 0, 0);
+ lfsr_rollback_word(revstate, 0, 0);
+ lfsr_rollback_word(revstate, AuthData.nr_enc, 1);
+ lfsr_rollback_word(revstate, AuthData.uid ^ AuthData.nt, 0);
+
+ uint64_t lfsr = 0;
+ crypto1_get_lfsr(revstate, &lfsr);
+ crypto1_destroy(revstate);
+ mfLastKey = lfsr;
+ PrintAndLog(" | * | key | probable key:%x%x Prng:%s ks2:%08x ks3:%08x | |",
+ (unsigned int)((lfsr & 0xFFFFFFFF00000000) >> 32), (unsigned int)(lfsr & 0xFFFFFFFF),
+ validate_prng_nonce(AuthData.nt) ? "WEAK": "HARD",
+ ks2,
+ ks3);
+
+ AuthData.first_auth = false;
+
+ traceCrypto1 = lfsr_recovery64(ks2, ks3);
+ } else {
+ printf("uid:%x nt:%x ar_enc:%x at_enc:%x\n", AuthData.uid, AuthData.nt, AuthData.ar_enc, AuthData.at_enc);
+
+ // check last used key
+ if (mfLastKey) {
+
+ }
+
+ // check default keys
+
+ // nested
+ if (validate_prng_nonce(AuthData.nt)) {
+ }
+
+ //hardnested
+ }
+
+
+
+ MifareAuthState = masData;
+ }
+
+ if (MifareAuthState == masData && traceCrypto1) {
+ memcpy(mfData, cmd, cmdsize);
+ mf_crypto1_decrypt(traceCrypto1, mfData, cmdsize, 0);
+ *mfDataLen = cmdsize;
+ }
+
+ return *mfDataLen > 0;
+}
+
projects / proxmark3-svn / blobdiff