mirror of
https://github.com/RfidResearchGroup/proxmark3.git
synced 2025-08-14 18:48:13 -07:00
improved version of "hf 14a mifare" command
with merge with utility nonce2key
This commit is contained in:
Merlokbr@gmail.com
parent
4abe4f5867
commit
f89c705002
14 changed files with 1155 additions and 106 deletions
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@ -1,4 +1,5 @@
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//-----------------------------------------------------------------------------
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// Merlok - June 2011
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// Gerhard de Koning Gans - May 2008
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// Hagen Fritsch - June 2010
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//
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@ -1492,6 +1493,16 @@ int ReaderReceive(uint8_t* receivedAnswer)
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return Demod.len;
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}
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int ReaderReceivePar(uint8_t* receivedAnswer, uint32_t * parptr)
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{
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int samples = 0;
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if (!GetIso14443aAnswerFromTag(receivedAnswer,160,&samples,0)) return FALSE;
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if (tracing) LogTrace(receivedAnswer,Demod.len,samples,Demod.parityBits,FALSE);
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*parptr = Demod.parityBits;
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if(samples == 0) return FALSE;
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return Demod.len;
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}
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/* performs iso14443a anticolision procedure
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* fills the uid pointer unless NULL
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* fills resp_data unless NULL */
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@ -1664,11 +1675,11 @@ void ReaderMifare(uint32_t parameter)
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{
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// Mifare AUTH
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uint8_t mf_auth[] = { 0x60,0x00,0xf5,0x7b };
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uint8_t mf_nr_ar[] = { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 };
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uint8_t mf_nr_ar[] = { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 };
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uint8_t* receivedAnswer = (((uint8_t *)BigBuf) + 3560); // was 3560 - tied to other size changes
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traceLen = 0;
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tracing = false;
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uint8_t* receivedAnswer = (((uint8_t *)BigBuf) + 3560); // was 3560 - tied to other size changes
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traceLen = 0;
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tracing = false;
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iso14443a_setup();
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@ -1676,89 +1687,103 @@ void ReaderMifare(uint32_t parameter)
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LED_B_OFF();
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LED_C_OFF();
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byte_t nt_diff = 0;
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LED_A_OFF();
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byte_t par = 0;
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byte_t par_mask = 0xff;
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byte_t par_low = 0;
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int led_on = TRUE;
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byte_t nt_diff = 0;
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LED_A_OFF();
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byte_t par = 0;
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byte_t par_mask = 0xff;
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byte_t par_low = 0;
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int led_on = TRUE;
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uint8_t uid[7];
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uint32_t cuid;
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tracing = FALSE;
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byte_t nt[4];
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byte_t nt_attacked[4];
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byte_t par_list[8];
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byte_t ks_list[8];
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num_to_bytes(parameter,4,nt_attacked);
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tracing = FALSE;
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byte_t nt[4] = {0,0,0,0};
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byte_t nt_attacked[4];
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byte_t par_list[8] = {0,0,0,0,0,0,0,0};
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byte_t ks_list[8] = {0,0,0,0,0,0,0,0};
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num_to_bytes(parameter, 4, nt_attacked);
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int isOK = 0;
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while(TRUE)
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{
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FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
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SpinDelay(200);
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FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_MOD);
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while(TRUE)
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{
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FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
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SpinDelay(200);
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FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_MOD);
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// Test if the action was cancelled
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if(BUTTON_PRESS()) {
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break;
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}
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// Test if the action was cancelled
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if(BUTTON_PRESS()) {
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break;
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}
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if(!iso14443a_select_card(uid, NULL, &cuid)) continue;
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if(!iso14443a_select_card(NULL, NULL, NULL)) continue;
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// Transmit MIFARE_CLASSIC_AUTH
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ReaderTransmit(mf_auth, sizeof(mf_auth));
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// Transmit MIFARE_CLASSIC_AUTH
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ReaderTransmit(mf_auth,sizeof(mf_auth));
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// Receive the (16 bit) "random" nonce
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if (!ReaderReceive(receivedAnswer)) continue;
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memcpy(nt, receivedAnswer, 4);
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// Receive the (16 bit) "random" nonce
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if (!ReaderReceive(receivedAnswer)) continue;
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memcpy(nt,receivedAnswer,4);
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// Transmit reader nonce and reader answer
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ReaderTransmitPar(mf_nr_ar, sizeof(mf_nr_ar),par);
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// Transmit reader nonce and reader answer
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ReaderTransmitPar(mf_nr_ar,sizeof(mf_nr_ar),par);
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// Receive 4 bit answer
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if (ReaderReceive(receivedAnswer))
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{
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if (nt_diff == 0)
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{
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LED_A_ON();
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memcpy(nt_attacked, nt, 4);
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par_mask = 0xf8;
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par_low = par & 0x07;
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}
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// Receive 4 bit answer
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if (ReaderReceive(receivedAnswer))
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{
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if (nt_diff == 0)
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{
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LED_A_ON();
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memcpy(nt_attacked,nt,4);
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par_mask = 0xf8;
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par_low = par & 0x07;
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}
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if (memcmp(nt, nt_attacked, 4) != 0) continue;
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if (memcmp(nt,nt_attacked,4) != 0) continue;
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led_on = !led_on;
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if(led_on) LED_B_ON(); else LED_B_OFF();
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par_list[nt_diff] = par;
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ks_list[nt_diff] = receivedAnswer[0] ^ 0x05;
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led_on = !led_on;
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if(led_on) LED_B_ON(); else LED_B_OFF();
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par_list[nt_diff] = par;
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ks_list[nt_diff] = receivedAnswer[0]^0x05;
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// Test if the information is complete
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if (nt_diff == 0x07) {
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isOK = 1;
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break;
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}
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// Test if the information is complete
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if (nt_diff == 0x07) break;
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nt_diff = (nt_diff + 1) & 0x07;
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mf_nr_ar[3] = nt_diff << 5;
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par = par_low;
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} else {
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if (nt_diff == 0)
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{
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par++;
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} else {
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par = (((par >> 3) + 1) << 3) | par_low;
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}
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}
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}
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nt_diff = (nt_diff+1) & 0x07;
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mf_nr_ar[3] = nt_diff << 5;
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par = par_low;
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} else {
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if (nt_diff == 0)
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{
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par++;
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} else {
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par = (((par>>3)+1) << 3) | par_low;
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}
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}
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}
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LogTrace(nt, 4, 0, GetParity(nt, 4), TRUE);
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LogTrace(par_list, 8, 0, GetParity(par_list, 8), TRUE);
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LogTrace(ks_list, 8, 0, GetParity(ks_list, 8), TRUE);
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LogTrace(nt,4,0,GetParity(nt,4),TRUE);
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LogTrace(par_list,8,0,GetParity(par_list,8),TRUE);
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LogTrace(ks_list,8,0,GetParity(ks_list,8),TRUE);
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UsbCommand ack = {CMD_ACK, {isOK, 0, 0}};
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memcpy(ack.d.asBytes + 0, uid, 4);
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memcpy(ack.d.asBytes + 4, nt, 4);
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memcpy(ack.d.asBytes + 8, par_list, 8);
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memcpy(ack.d.asBytes + 16, ks_list, 8);
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LED_B_ON();
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UsbSendPacket((uint8_t *)&ack, sizeof(UsbCommand));
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LED_B_OFF();
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// Thats it...
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// Thats it...
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FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
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LEDsoff();
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tracing = TRUE;
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DbpString("COMMAND FINISHED");
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Dbprintf("nt=%x", (int)nt[0]);
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tracing = TRUE;
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// DbpString("COMMAND mifare FINISHED");
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}
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//-----------------------------------------------------------------------------
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@ -2027,6 +2052,14 @@ void MifareWriteBlock(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
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}
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// Return 1 if the nonce is invalid else return 0
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int valid_nonce(uint32_t Nt, uint32_t NtEnc, uint32_t Ks1, byte_t * parity) {
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return ((oddparity((Nt >> 24) & 0xFF) == ((parity[0]) ^ oddparity((NtEnc >> 24) & 0xFF) ^ BIT(Ks1,16))) & \
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(oddparity((Nt >> 16) & 0xFF) == ((parity[1]) ^ oddparity((NtEnc >> 16) & 0xFF) ^ BIT(Ks1,8))) & \
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(oddparity((Nt >> 8) & 0xFF) == ((parity[2]) ^ oddparity((NtEnc >> 8) & 0xFF) ^ BIT(Ks1,0)))) ? 1 : 0;
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}
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//-----------------------------------------------------------------------------
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// MIFARE nested authentication.
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//
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@ -2041,60 +2074,191 @@ void MifareNested(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
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ui64Key = bytes_to_num(datain, 6);
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// variables
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byte_t isOK = 0;
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uint8_t targetBlockNo = blockNo + 1;
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int rtr, i, m, len;
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int davg, dmin, dmax;
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uint8_t uid[8];
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uint32_t cuid;
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uint8_t dataoutbuf[16];
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uint32_t cuid, nt1, nt2, nttmp, nttest, par, ks1;
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uint8_t par_array[4];
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nestedVector nvector[3][10];
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int nvectorcount[3] = {10, 10, 10};
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int ncount = 0;
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struct Crypto1State mpcs = {0, 0};
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struct Crypto1State *pcs;
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pcs = &mpcs;
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uint8_t* receivedAnswer = mifare_get_bigbufptr();
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// clear trace
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traceLen = 0;
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// tracing = false;
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tracing = false;
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iso14443a_setup();
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LED_A_ON();
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LED_B_OFF();
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LED_B_ON();
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LED_C_OFF();
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while (true) {
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FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
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SpinDelay(200);
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davg = dmax = 0;
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dmin = 2000;
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// test nonce distance
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for (rtr = 0; rtr < 10; rtr++) {
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FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
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SpinDelay(100);
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FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_MOD);
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// Test if the action was cancelled
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if(BUTTON_PRESS()) {
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break;
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}
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if(!iso14443a_select_card(uid, NULL, &cuid)) {
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Dbprintf("Can't select card");
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break;
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};
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if(mifare_classic_auth(pcs, cuid, blockNo, keyType, ui64Key, AUTH_FIRST)) {
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Dbprintf("Auth error");
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if(mifare_classic_authex(pcs, cuid, blockNo, keyType, ui64Key, AUTH_FIRST, &nt1)) {
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Dbprintf("Auth1 error");
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break;
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};
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// nested authenticate block = (blockNo + 1)
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if(mifare_classic_auth(pcs, (uint32_t)bytes_to_num(uid, 4), blockNo + 1, keyType, ui64Key, AUTH_NESTED)) {
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Dbprintf("Auth error");
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if(mifare_classic_authex(pcs, cuid, blockNo, keyType, ui64Key, AUTH_NESTED, &nt2)) {
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Dbprintf("Auth2 error");
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break;
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};
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if(mifare_classic_readblock(pcs, (uint32_t)bytes_to_num(uid, 4), blockNo + 1, dataoutbuf)) {
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Dbprintf("Read block error");
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break;
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};
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if(mifare_classic_halt(pcs, (uint32_t)bytes_to_num(uid, 4))) {
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Dbprintf("Halt error");
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break;
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};
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nttmp = prng_successor(nt1, 500);
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for (i = 501; i < 2000; i++) {
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nttmp = prng_successor(nttmp, 1);
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if (nttmp == nt2) break;
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}
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isOK = 1;
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break;
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if (i != 2000) {
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davg += i;
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if (dmin > i) dmin = i;
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if (dmax < i) dmax = i;
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// Dbprintf("r=%d nt1=%08x nt2=%08x distance=%d", rtr, nt1, nt2, i);
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}
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}
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if (rtr == 0) return;
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davg = davg / rtr;
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Dbprintf("distance: min=%d max=%d avg=%d", dmin, dmax, davg);
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LED_B_OFF();
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tracing = true;
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LED_C_ON();
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// get crypted nonces for target sector
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for (rtr = 0; rtr < 4; rtr++) {
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Dbprintf("------------------------------");
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FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
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SpinDelay(100);
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FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_MOD);
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// Test if the action was cancelled
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if(BUTTON_PRESS()) {
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break;
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}
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if(!iso14443a_select_card(uid, NULL, &cuid)) {
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Dbprintf("Can't select card");
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break;
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};
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if(mifare_classic_authex(pcs, cuid, blockNo, keyType, ui64Key, AUTH_FIRST, &nt1)) {
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Dbprintf("Auth1 error");
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break;
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};
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// nested authentication
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len = mifare_sendcmd_shortex(pcs, AUTH_NESTED, 0x60 + (keyType & 0x01), targetBlockNo, receivedAnswer, &par);
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if (len != 4) {
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Dbprintf("Auth2 error len=%d", len);
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break;
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};
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nt2 = bytes_to_num(receivedAnswer, 4);
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Dbprintf("r=%d nt1=%08x nt2enc=%08x nt2par=%08x", rtr, nt1, nt2, par);
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// ----------------------- test
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/* uint32_t d_nt, d_ks1, d_ks2, d_ks3, reader_challenge;
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byte_t ar[4];
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ar[0] = 0x55;
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ar[1] = 0x41;
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ar[2] = 0x49;
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ar[3] = 0x92;
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crypto1_destroy(pcs);
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crypto1_create(pcs, ui64Key);
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// decrypt nt with help of new key
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d_nt = crypto1_word(pcs, nt2 ^ cuid, 1) ^ nt2;
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reader_challenge = d_nt;//(uint32_t)bytes_to_num(ar, 4);
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d_ks1 = crypto1_word(pcs, reader_challenge, 0);
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d_ks2 = crypto1_word(pcs, 0, 0);
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d_ks3 = crypto1_word(pcs, 0,0);
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Dbprintf("TST: ks1=%08x nt=%08x", d_ks1, d_nt);*/
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// ----------------------- test
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// Parity validity check
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for (i = 0; i < 4; i++) {
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par_array[i] = (oddparity(receivedAnswer[i]) != ((par & 0x08) >> 3));
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par = par << 1;
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}
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ncount = 0;
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for (m = dmin - 10; m < dmax + 10; m++) {
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nttest = prng_successor(nt1, m);
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ks1 = nt2 ^ nttest;
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//-------------------------------------- test
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/* if (nttest == d_nt){
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Dbprintf("nttest=d_nt! m=%d ks1=%08x nttest=%08x", m, ks1, nttest);
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}*/
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//-------------------------------------- test
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if (valid_nonce(nttest, nt2, ks1, par_array) && (ncount < 11)){
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nvector[2][ncount].nt = nttest;
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nvector[2][ncount].ks1 = ks1;
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ncount++;
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nvectorcount[2] = ncount;
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Dbprintf("valid m=%d ks1=%08x nttest=%08x", m, ks1, nttest);
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}
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}
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// select vector with length less than got
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m = 2;
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if (nvectorcount[2] < nvectorcount[1]) m = 1;
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if (nvectorcount[2] < nvectorcount[0]) m = 0;
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if (m != 2) {
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for (i = 0; i < nvectorcount[m]; i++) {
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nvector[m][i] = nvector[2][i];
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}
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nvectorcount[m] = nvectorcount[2];
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}
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Dbprintf("vector count: 1=%d 2=%d 3=%d", nvectorcount[0], nvectorcount[1], nvectorcount[2]);
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}
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LED_C_OFF();
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// ----------------------------- crypto1 destroy
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crypto1_destroy(pcs);
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DbpString("NESTED FINISHED");
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// add trace trailer
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uid[0] = 0xff;
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uid[1] = 0xff;
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@ -2102,13 +2266,33 @@ void MifareNested(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
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uid[3] = 0xff;
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LogTrace(uid, 4, 0, 0, TRUE);
|
||||
|
||||
UsbCommand ack = {CMD_ACK, {isOK, 0, 0}};
|
||||
memcpy(ack.d.asBytes, dataoutbuf, 16);
|
||||
for (i = 0; i < 2; i++) {
|
||||
ncount = nvectorcount[i];
|
||||
if (ncount > 5) ncount = 5; //!!!!! needs to be 2 packets x 5 pairs (nt,ks1)
|
||||
|
||||
// isEOF = 0
|
||||
UsbCommand ack = {CMD_ACK, {0, ncount, targetBlockNo}};
|
||||
memcpy(ack.d.asBytes, &cuid, 4);
|
||||
for (m = 0; m < 5; m++) {
|
||||
memcpy(ack.d.asBytes + 4 + m * 8 + 0, &nvector[i][m].nt, 4);
|
||||
memcpy(ack.d.asBytes + 4 + m * 8 + 4, &nvector[i][m].ks1, 4);
|
||||
}
|
||||
|
||||
LED_B_ON();
|
||||
UsbSendPacket((uint8_t *)&ack, sizeof(UsbCommand));
|
||||
LED_B_OFF();
|
||||
}
|
||||
|
||||
// finalize list
|
||||
// isEOF = 1
|
||||
UsbCommand ack = {CMD_ACK, {1, 0, 0}};
|
||||
|
||||
LED_B_ON();
|
||||
UsbSendPacket((uint8_t *)&ack, sizeof(UsbCommand));
|
||||
LED_B_OFF();
|
||||
|
||||
DbpString("NESTED FINISHED");
|
||||
|
||||
// Thats it...
|
||||
FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
|
||||
LEDsoff();
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue