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https://github.com/RfidResearchGroup/proxmark3.git
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66 lines
2 KiB
C
Executable file
66 lines
2 KiB
C
Executable file
// Test-file: test2.c
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#include "crapto1.h"
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#include <stdio.h>
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int main (int argc, char *argv[]) {
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struct Crypto1State *revstate;
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uint64_t lfsr;
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uint8_t* plfsr = (uint8_t*)&lfsr;
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uint32_t uid; // serial number
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uint32_t nt; // tag challenge
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uint32_t nr_enc; // encrypted reader challenge
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uint32_t ar_enc; // encrypted reader response
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uint32_t at_enc; // encrypted tag response
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uint32_t ks2; // keystream used to encrypt reader response
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uint32_t ks3; // keystream used to encrypt tag response
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printf("MIFARE Classic key recovery\n\n");
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if (argc < 6) {
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printf(" syntax: %s <uid> <nt> <{nr}> <{ar}> <{at}>\n\n",argv[0]);
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return 1;
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}
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sscanf(argv[1],"%x",&uid);
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sscanf(argv[2],"%x",&nt);
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sscanf(argv[3],"%x",&nr_enc);
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sscanf(argv[4],"%x",&ar_enc);
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sscanf(argv[5],"%x",&at_enc);
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printf("Recovering key for:\n");
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printf(" uid: %08x\n",uid);
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printf(" nt: %08x\n",nt);
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printf(" {nr}: %08x\n",nr_enc);
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printf(" {ar}: %08x\n",ar_enc);
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printf(" {at}: %08x\n",at_enc);
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/*
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uint32_t uid = 0x9c599b32;
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uint32_t tag_challenge = 0x82a4166c;
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uint32_t nr_enc = 0xa1e458ce;
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uint32_t reader_response = 0x6eea41e0;
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uint32_t tag_response = 0x5cadf439;
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*/
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// Generate lfsr succesors of the tag challenge
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printf("\nLFSR succesors of the tag challenge:\n");
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printf(" nt': %08x\n",prng_successor(nt, 64));
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printf(" nt'': %08x\n",prng_successor(nt, 96));
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// Extract the keystream from the messages
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printf("\nKeystream used to generate {ar} and {at}:\n");
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ks2 = ar_enc ^ prng_successor(nt, 64);
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ks3 = at_enc ^ prng_successor(nt, 96);
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printf(" ks2: %08x\n",ks2);
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printf(" ks3: %08x\n",ks3);
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revstate = lfsr_recovery64(ks2, ks3);
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lfsr_rollback_word(revstate, 0, 0);
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lfsr_rollback_word(revstate, 0, 0);
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lfsr_rollback_word(revstate, nr_enc, 1);
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lfsr_rollback_word(revstate, uid ^ nt, 0);
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crypto1_get_lfsr(revstate, &lfsr);
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printf("\nFound Key: [%02x %02x %02x %02x %02x %02x]\n\n",plfsr[5],plfsr[4],plfsr[3],plfsr[2],plfsr[1],plfsr[0]);
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return 0;
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}
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