--- /dev/null
+#define __STDC_FORMAT_MACROS
+#include <inttypes.h>
+#define llx PRIx64
+#define lli PRIi64
+
+// Test-file: test2.c
+#include "crapto1.h"
+#include <stdio.h>
+
+int main (int argc, char *argv[]) {
+ struct Crypto1State *revstate;
+ uint64_t key; // recovered key
+ uint32_t uid; // serial number
+ uint32_t nt; // tag challenge
+ uint32_t nr_enc; // encrypted reader challenge
+ uint32_t ar_enc; // encrypted reader response
+ uint32_t at_enc; // encrypted tag response
+ uint32_t ks2; // keystream used to encrypt reader response
+ uint32_t ks3; // keystream used to encrypt tag response
+
+ printf("MIFARE Classic key recovery - based 64 bits of keystream\n");
+ printf("Recover key from only one complete authentication!\n\n");
+
+ if (argc < 6) {
+ printf(" syntax: %s <uid> <nt> <{nr}> <{ar}> <{at}>\n\n",argv[0]);
+ return 1;
+ }
+
+ sscanf(argv[1],"%x",&uid);
+ sscanf(argv[2],"%x",&nt);
+ sscanf(argv[3],"%x",&nr_enc);
+ sscanf(argv[4],"%x",&ar_enc);
+ sscanf(argv[5],"%x",&at_enc);
+
+ printf("Recovering key for:\n");
+ printf(" uid: %08x\n",uid);
+ printf(" nt: %08x\n",nt);
+ printf(" {nr}: %08x\n",nr_enc);
+ printf(" {ar}: %08x\n",ar_enc);
+ printf(" {at}: %08x\n",at_enc);
+
+/*
+ uint32_t uid = 0x9c599b32;
+ uint32_t tag_challenge = 0x82a4166c;
+ uint32_t nr_enc = 0xa1e458ce;
+ uint32_t reader_response = 0x6eea41e0;
+ uint32_t tag_response = 0x5cadf439;
+*/
+ // Generate lfsr succesors of the tag challenge
+ printf("\nLFSR succesors of the tag challenge:\n");
+ printf(" nt': %08x\n",prng_successor(nt, 64));
+ printf(" nt'': %08x\n",prng_successor(nt, 96));
+
+ // Extract the keystream from the messages
+ printf("\nKeystream used to generate {ar} and {at}:\n");
+ ks2 = ar_enc ^ prng_successor(nt, 64);
+ ks3 = at_enc ^ prng_successor(nt, 96);
+ printf(" ks2: %08x\n",ks2);
+ printf(" ks3: %08x\n",ks3);
+
+ revstate = lfsr_recovery64(ks2, ks3);
+ lfsr_rollback_word(revstate, 0, 0);
+ lfsr_rollback_word(revstate, 0, 0);
+ lfsr_rollback_word(revstate, nr_enc, 1);
+ lfsr_rollback_word(revstate, uid ^ nt, 0);
+ crypto1_get_lfsr(revstate, &key);
+ printf("\nFound Key: [%012"llx"]\n\n",key);
+ crypto1_destroy(revstate);
+
+ return 0;
+}