X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/2da2e9283771f20e4fb809709ea1c97c0636e455..dc3e2acf33a1f62b530d3a199073c1b9bfebf9b5:/armsrc/mifareutil.c?ds=sidebyside diff --git a/armsrc/mifareutil.c b/armsrc/mifareutil.c index 8ef364c2..684b5e36 100644 --- a/armsrc/mifareutil.c +++ b/armsrc/mifareutil.c @@ -9,37 +9,44 @@ // Work with mifare cards. //----------------------------------------------------------------------------- +#include "mifareutil.h" + +#include +#include + #include "proxmark3.h" #include "apps.h" #include "util.h" -#include "string.h" - +#include "parity.h" #include "iso14443crc.h" #include "iso14443a.h" -#include "crapto1.h" -#include "mifareutil.h" -#include "des.h" +#include "crapto1/crapto1.h" +#include "polarssl/des.h" int MF_DBGLEVEL = MF_DBG_ALL; // crypto1 helpers -void mf_crypto1_decrypt(struct Crypto1State *pcs, uint8_t *data, int len){ +void mf_crypto1_decryptEx(struct Crypto1State *pcs, uint8_t *data_in, int len, uint8_t *data_out){ uint8_t bt = 0; int i; if (len != 1) { for (i = 0; i < len; i++) - data[i] = crypto1_byte(pcs, 0x00, 0) ^ data[i]; + data_out[i] = crypto1_byte(pcs, 0x00, 0) ^ data_in[i]; } else { bt = 0; for (i = 0; i < 4; i++) - bt |= (crypto1_bit(pcs, 0, 0) ^ BIT(data[0], i)) << i; + bt |= (crypto1_bit(pcs, 0, 0) ^ BIT(data_in[0], i)) << i; - data[0] = bt; + data_out[0] = bt; } return; } +void mf_crypto1_decrypt(struct Crypto1State *pcs, uint8_t *data, int len){ + mf_crypto1_decryptEx(pcs, data, len, data); +} + void mf_crypto1_encrypt(struct Crypto1State *pcs, uint8_t *data, uint16_t len, uint8_t *par) { uint8_t bt = 0; int i; @@ -50,7 +57,7 @@ void mf_crypto1_encrypt(struct Crypto1State *pcs, uint8_t *data, uint16_t len, u data[i] = crypto1_byte(pcs, 0x00, 0) ^ data[i]; if((i&0x0007) == 0) par[i>>3] = 0; - par[i>>3] |= (((filter(pcs->odd) ^ oddparity(bt)) & 0x01)<<(7-(i&0x0007))); + par[i>>3] |= (((filter(pcs->odd) ^ oddparity8(bt)) & 0x01)<<(7-(i&0x0007))); } return; } @@ -99,7 +106,7 @@ int mifare_sendcmd_short(struct Crypto1State *pcs, uint8_t crypted, uint8_t cmd, for (pos = 0; pos < 4; pos++) { ecmd[pos] = crypto1_byte(pcs, 0x00, 0) ^ dcmd[pos]; - par[0] |= (((filter(pcs->odd) ^ oddparity(dcmd[pos])) & 0x01) << (7-pos)); + par[0] |= (((filter(pcs->odd) ^ oddparity8(dcmd[pos])) & 0x01) << (7-pos)); } ReaderTransmitPar(ecmd, sizeof(ecmd), par, timing); @@ -193,7 +200,7 @@ int mifare_classic_authex(struct Crypto1State *pcs, uint32_t uid, uint8_t blockN for (pos = 0; pos < 4; pos++) { mf_nr_ar[pos] = crypto1_byte(pcs, nr[pos], 0) ^ nr[pos]; - par[0] |= (((filter(pcs->odd) ^ oddparity(nr[pos])) & 0x01) << (7-pos)); + par[0] |= (((filter(pcs->odd) ^ oddparity8(nr[pos])) & 0x01) << (7-pos)); } // Skip 32 bits in pseudo random generator @@ -204,7 +211,7 @@ int mifare_classic_authex(struct Crypto1State *pcs, uint32_t uid, uint8_t blockN { nt = prng_successor(nt,8); mf_nr_ar[pos] = crypto1_byte(pcs,0x00,0) ^ (nt & 0xff); - par[0] |= (((filter(pcs->odd) ^ oddparity(nt & 0xff)) & 0x01) << (7-pos)); + par[0] |= (((filter(pcs->odd) ^ oddparity8(nt)) & 0x01) << (7-pos)); } // Transmit reader nonce and reader answer @@ -289,6 +296,7 @@ int mifare_ultra_auth(uint8_t *keybytes){ /// 3des2k + des3_context ctx = { 0x00 }; uint8_t random_a[8] = {1,1,1,1,1,1,1,1}; uint8_t random_b[8] = {0x00}; uint8_t enc_random_b[8] = {0x00}; @@ -312,7 +320,16 @@ int mifare_ultra_auth(uint8_t *keybytes){ memcpy(enc_random_b,resp+1,8); // decrypt nonce. - tdes_2key_dec(random_b, enc_random_b, sizeof(random_b), key, IV ); + // tdes_2key_dec(random_b, enc_random_b, sizeof(random_b), key, IV ); + des3_set2key_dec(&ctx, key); + des3_crypt_cbc(&ctx // des3_context + , DES_DECRYPT // int mode + , sizeof(random_b) // length + , IV // iv[8] + , enc_random_b // input + , random_b // output + ); + rol(random_b,8); memcpy(rnd_ab ,random_a,8); memcpy(rnd_ab+8,random_b,8); @@ -332,7 +349,16 @@ int mifare_ultra_auth(uint8_t *keybytes){ } // encrypt out, in, length, key, iv - tdes_2key_enc(rnd_ab, rnd_ab, sizeof(rnd_ab), key, enc_random_b); + //tdes_2key_enc(rnd_ab, rnd_ab, sizeof(rnd_ab), key, enc_random_b); + des3_set2key_enc(&ctx, key); + des3_crypt_cbc(&ctx // des3_context + , DES_ENCRYPT // int mode + , sizeof(rnd_ab) // length + , enc_random_b // iv[8] + , rnd_ab // input + , rnd_ab // output + ); + //len = mifare_sendcmd_short_mfucauth(NULL, 1, 0xAF, rnd_ab, resp, respPar, NULL); len = mifare_sendcmd(0xAF, rnd_ab, sizeof(rnd_ab), resp, respPar, NULL); if (len != 11) { @@ -345,7 +371,15 @@ int mifare_ultra_auth(uint8_t *keybytes){ memcpy(enc_resp, resp+1, 8); // decrypt out, in, length, key, iv - tdes_2key_dec(resp_random_a, enc_resp, 8, key, enc_random_b); + // tdes_2key_dec(resp_random_a, enc_resp, 8, key, enc_random_b); + des3_set2key_dec(&ctx, key); + des3_crypt_cbc(&ctx // des3_context + , DES_DECRYPT // int mode + , 8 // length + , enc_random_b // iv[8] + , enc_resp // input + , resp_random_a // output + ); if ( memcmp(resp_random_a, random_a, 8) != 0 ) { if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("failed authentication"); return 0; @@ -371,31 +405,48 @@ int mifare_ultra_auth(uint8_t *keybytes){ return 1; } + +#define MFU_MAX_RETRIES 5 int mifare_ultra_readblock(uint8_t blockNo, uint8_t *blockData) { uint16_t len; uint8_t bt[2]; uint8_t receivedAnswer[MAX_FRAME_SIZE]; uint8_t receivedAnswerPar[MAX_PARITY_SIZE]; - + uint8_t retries; + int result = 0; - len = mifare_sendcmd_short(NULL, 1, 0x30, blockNo, receivedAnswer, receivedAnswerPar, NULL); - if (len == 1) { - if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd Error: %02x", receivedAnswer[0]); - return 1; - } - if (len != 18) { - if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd Error: card timeout. len: %x", len); - return 2; + for (retries = 0; retries < MFU_MAX_RETRIES; retries++) { + len = mifare_sendcmd_short(NULL, 1, 0x30, blockNo, receivedAnswer, receivedAnswerPar, NULL); + if (len == 1) { + if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd Error: %02x", receivedAnswer[0]); + result = 1; + continue; + } + if (len != 18) { + if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd Error: card timeout. len: %x", len); + result = 2; + continue; + } + + memcpy(bt, receivedAnswer + 16, 2); + AppendCrc14443a(receivedAnswer, 16); + if (bt[0] != receivedAnswer[16] || bt[1] != receivedAnswer[17]) { + if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd CRC response error."); + result = 3; + continue; + } + + // No errors encountered; don't retry + result = 0; + break; } - - memcpy(bt, receivedAnswer + 16, 2); - AppendCrc14443a(receivedAnswer, 16); - if (bt[0] != receivedAnswer[16] || bt[1] != receivedAnswer[17]) { - if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd CRC response error."); - return 3; + + if (result != 0) { + Dbprintf("Cmd Error: too many retries; read failed"); + return result; } - + memcpy(blockData, receivedAnswer, 14); return 0; } @@ -427,7 +478,7 @@ int mifare_classic_writeblock(struct Crypto1State *pcs, uint32_t uid, uint8_t bl for (pos = 0; pos < 18; pos++) { d_block_enc[pos] = crypto1_byte(pcs, 0x00, 0) ^ d_block[pos]; - par[pos>>3] |= (((filter(pcs->odd) ^ oddparity(d_block[pos])) & 0x01) << (7 - (pos&0x0007))); + par[pos>>3] |= (((filter(pcs->odd) ^ oddparity8(d_block[pos])) & 0x01) << (7 - (pos&0x0007))); } ReaderTransmitPar(d_block_enc, sizeof(d_block_enc), par, NULL); @@ -553,6 +604,19 @@ uint8_t FirstBlockOfSector(uint8_t sectorNo) } +uint8_t SectorTrailer(uint8_t blockNo) +{ + if (blockNo < 32*4) { + return (blockNo | 0x03); + } else { + return (blockNo | 0x0f); + } +} + +bool IsSectorTrailer(uint8_t blockNo) +{ + return (blockNo == SectorTrailer(blockNo)); +} // work with emulator memory void emlSetMem(uint8_t *data, int blockNum, int blocksCount) { @@ -736,3 +800,125 @@ int mifare_desfire_des_auth2(uint32_t uid, uint8_t *key, uint8_t *blockData){ } return 1; } + +//----------------------------------------------------------------------------- +// MIFARE check keys +// +//----------------------------------------------------------------------------- +// one key check +int MifareChkBlockKey(uint8_t *uid, uint32_t *cuid, uint8_t *cascade_levels, uint64_t ui64Key, uint8_t blockNo, uint8_t keyType, uint8_t debugLevel) { + + struct Crypto1State mpcs = {0, 0}; + struct Crypto1State *pcs; + pcs = &mpcs; + + // Iceman: use piwi's faster nonce collecting part in hardnested. + if (*cascade_levels == 0) { // need a full select cycle to get the uid first + iso14a_card_select_t card_info; + if(!iso14443a_select_card(uid, &card_info, cuid, true, 0, true)) { + if (debugLevel >= 1) Dbprintf("ChkKeys: Can't select card"); + return 1; + } + switch (card_info.uidlen) { + case 4 : *cascade_levels = 1; break; + case 7 : *cascade_levels = 2; break; + case 10: *cascade_levels = 3; break; + default: break; + } + } else { // no need for anticollision. We can directly select the card + if(!iso14443a_select_card(uid, NULL, NULL, false, *cascade_levels, true)) { + if (debugLevel >= 1) Dbprintf("ChkKeys: Can't select card (UID) lvl=%d", *cascade_levels); + return 1; + } + } + + if(mifare_classic_auth(pcs, *cuid, blockNo, keyType, ui64Key, AUTH_FIRST)) { +// SpinDelayUs(AUTHENTICATION_TIMEOUT); // it not needs because mifare_classic_auth have timeout from iso14a_set_timeout() + return 2; + } else { +/* // let it be here. it like halt command, but maybe it will work in some strange cases + uint8_t dummy_answer = 0; + ReaderTransmit(&dummy_answer, 1, NULL); + int timeout = GetCountSspClk() + AUTHENTICATION_TIMEOUT; + // wait for the card to become ready again + while(GetCountSspClk() < timeout) {}; +*/ + // it needs after success authentication + mifare_classic_halt(pcs, *cuid); + } + + return 0; +} + +// multi key check +int MifareChkBlockKeys(uint8_t *keys, uint8_t keyCount, uint8_t blockNo, uint8_t keyType, uint8_t debugLevel) { + uint8_t uid[10]; + uint32_t cuid = 0; + uint8_t cascade_levels = 0; + uint64_t ui64Key = 0; + + int retryCount = 0; + for (uint8_t i = 0; i < keyCount; i++) { + + // Allow button press / usb cmd to interrupt device + if (BUTTON_PRESS() && !usb_poll_validate_length()) { + Dbprintf("ChkKeys: Cancel operation. Exit..."); + return -2; + } + + ui64Key = bytes_to_num(keys + i * 6, 6); + int res = MifareChkBlockKey(uid, &cuid, &cascade_levels, ui64Key, blockNo, keyType, debugLevel); + + // can't select + if (res == 1) { + retryCount++; + if (retryCount >= 5) { + Dbprintf("ChkKeys: block=%d key=%d. Can't select. Exit...", blockNo, keyType); + return -1; + } + --i; // try the same key once again + + SpinDelay(20); +// Dbprintf("ChkKeys: block=%d key=%d. Try the same key once again...", blockNo, keyType); + continue; + } + + // can't authenticate + if (res == 2) { + retryCount = 0; + continue; // can't auth. wrong key. + } + + return i + 1; + } + + return 0; +} + +// multisector multikey check +int MifareMultisectorChk(uint8_t *keys, uint8_t keyCount, uint8_t SectorCount, uint8_t keyType, uint8_t debugLevel, TKeyIndex *keyIndex) { + int res = 0; + +// int clk = GetCountSspClk(); + + for(int sc = 0; sc < SectorCount; sc++){ + WDT_HIT(); + + int keyAB = keyType; + do { + res = MifareChkBlockKeys(keys, keyCount, FirstBlockOfSector(sc), keyAB & 0x01, debugLevel); + if (res < 0){ + return res; + } + if (res > 0){ + (*keyIndex)[keyAB & 0x01][sc] = res; + } + } while(--keyAB > 0); + } + +// Dbprintf("%d %d", GetCountSspClk() - clk, (GetCountSspClk() - clk)/(SectorCount*keyCount*(keyType==2?2:1))); + + return 0; +} + +