SendCommand(&c);
return 0;
}
+int usage_hf_iclass_sim()
+{
+ PrintAndLog("Usage: hf iclass sim <option> [CSN]");
+ PrintAndLog(" options");
+ PrintAndLog(" 0 <CSN> simulate the given CSN");
+ PrintAndLog(" 1 simulate default CSN");
+ PrintAndLog(" 2 Reader-attack, gather reader responses to extract elite key");
+ PrintAndLog(" 3 Full simulation using emulator memory (see 'hf iclass eload')");
+ PrintAndLog(" example: hf iclass sim 0 031FEC8AF7FF12E0");
+ PrintAndLog(" example: hf iclass sim 2");
+ PrintAndLog(" example: hf iclass eload 'tagdump.bin'");
+ PrintAndLog(" hf iclass sim 3");
+ return 0;
+}
+
#define NUM_CSNS 15
int CmdHFiClassSim(const char *Cmd)
{
uint8_t CSN[8] = {0, 0, 0, 0, 0, 0, 0, 0};
if (strlen(Cmd)<1) {
- PrintAndLog("Usage: hf iclass sim [0 <CSN>] | x");
- PrintAndLog(" options");
- PrintAndLog(" 0 <CSN> simulate the given CSN");
- PrintAndLog(" 1 simulate default CSN");
- PrintAndLog(" 2 iterate CSNs, gather MACs");
- PrintAndLog(" sample: hf iclass sim 0 031FEC8AF7FF12E0");
- PrintAndLog(" sample: hf iclass sim 2");
- return 0;
+ usage_hf_iclass_sim();
}
simType = param_get8(Cmd, 0);
{
if (param_gethex(Cmd, 1, CSN, 16)) {
PrintAndLog("A CSN should consist of 16 HEX symbols");
- return 1;
+ return usage_hf_iclass_sim();
}
- PrintAndLog("--simtype:%02x csn:%s", simType, sprint_hex(CSN, 8));
+ PrintAndLog("--simtype:%02x csn:%s", simType, sprint_hex(CSN, 8));
}
- if(simType > 2)
+ if(simType > 3)
{
PrintAndLog("Undefined simptype %d", simType);
- return 1;
+ return usage_hf_iclass_sim();
}
- uint8_t numberOfCSNs=0;
+ uint8_t numberOfCSNs=0;
if(simType == 2)
{
UsbCommand c = {CMD_SIMULATE_TAG_ICLASS, {simType,NUM_CSNS}};
UsbCommand resp = {0};
- /*uint8_t csns[8 * NUM_CSNS] = {
- 0x00,0x0B,0x0F,0xFF,0xF7,0xFF,0x12,0xE0 ,
- 0x00,0x13,0x94,0x7e,0x76,0xff,0x12,0xe0 ,
- 0x2a,0x99,0xac,0x79,0xec,0xff,0x12,0xe0 ,
- 0x17,0x12,0x01,0xfd,0xf7,0xff,0x12,0xe0 ,
- 0xcd,0x56,0x01,0x7c,0x6f,0xff,0x12,0xe0 ,
- 0x4b,0x5e,0x0b,0x72,0xef,0xff,0x12,0xe0 ,
- 0x00,0x73,0xd8,0x75,0x58,0xff,0x12,0xe0 ,
- 0x0c,0x90,0x32,0xf3,0x5d,0xff,0x12,0xe0 };
-*/
-
uint8_t csns[8*NUM_CSNS] = {
0x00, 0x0B, 0x0F, 0xFF, 0xF7, 0xFF, 0x12, 0xE0,
0x00, 0x04, 0x0E, 0x08, 0xF7, 0xFF, 0x12, 0xE0,
return 0;
}
+int usage_hf_iclass_decrypt()
+{
+ PrintAndLog("Usage: hf iclass decrypt f <tagdump> o ");
+ PrintAndLog("");
+ PrintAndLog("OBS! In order to use this function, the file 'iclass_decryptionkey.bin' must reside");
+ PrintAndLog("in the working directory. The file should be 16 bytes binary data");
+ PrintAndLog("");
+ PrintAndLog("example: hf iclass decrypt tagdump_12312342343.bin");
+ PrintAndLog("");
+ PrintAndLog("OBS! This is pretty stupid implementation, it tries to decrypt every block after block 6. ");
+ PrintAndLog("Correct behaviour would be to decrypt only the application areas where the key is valid,");
+ PrintAndLog("which is defined by the configuration block.");
+ return 1;
+}
+
+int readKeyfile(const char *filename, size_t len, uint8_t* buffer)
+{
+ FILE *f = fopen(filename, "rb");
+ if(!f) {
+ PrintAndLog("Failed to read from file '%s'", filename);
+ return 1;
+ }
+ fseek(f, 0, SEEK_END);
+ long fsize = ftell(f);
+ fseek(f, 0, SEEK_SET);
+ size_t bytes_read = fread(buffer, 1, len, f);
+ fclose(f);
+ if(fsize != len)
+ {
+ PrintAndLog("Warning, file size is %d, expected %d", fsize, len);
+ return 1;
+ }
+ if(bytes_read != len)
+ {
+ PrintAndLog("Warning, could only read %d bytes, expected %d" ,bytes_read, len);
+ return 1;
+ }
+ return 0;
+}
+
+int CmdHFiClassDecrypt(const char *Cmd)
+{
+ uint8_t key[16] = { 0 };
+ if(readKeyfile("iclass_decryptionkey.bin", 16, key))
+ {
+ usage_hf_iclass_decrypt();
+ return 1;
+ }
+ PrintAndLog("Decryption file found... ");
+ char opt = param_getchar(Cmd, 0);
+ if (strlen(Cmd)<1 || opt == 'h')
+ return usage_hf_iclass_decrypt();
+
+ //Open the tagdump-file
+ FILE *f;
+ char filename[FILE_PATH_SIZE];
+ if(opt == 'f' && param_getstr(Cmd, 1, filename) > 0)
+ {
+ f = fopen(filename, "rb");
+ }else{
+ return usage_hf_iclass_decrypt();
+ }
+
+ fseek(f, 0, SEEK_END);
+ long fsize = ftell(f);
+ fseek(f, 0, SEEK_SET);
+ uint8_t enc_dump[8] = {0};
+ uint8_t *decrypted = malloc(fsize);
+ des3_context ctx = { DES_DECRYPT ,{ 0 } };
+ des3_set2key_dec( &ctx, key);
+ size_t bytes_read = fread(enc_dump, 1, 8, f);
+
+ //Use the first block (CSN) for filename
+ char outfilename[FILE_PATH_SIZE] = { 0 };
+ snprintf(outfilename,FILE_PATH_SIZE,"iclass_tagdump-%02x%02x%02x%02x%02x%02x%02x%02x-decrypted",
+ enc_dump[0],enc_dump[1],enc_dump[2],enc_dump[3],
+ enc_dump[4],enc_dump[5],enc_dump[6],enc_dump[7]);
+
+ size_t blocknum =0;
+ while(bytes_read == 8)
+ {
+ if(blocknum < 7)
+ {
+ memcpy(decrypted+(blocknum*8), enc_dump, 8);
+ }else{
+ des3_crypt_ecb(&ctx, enc_dump,decrypted +(blocknum*8) );
+ }
+ printvar("decrypted block", decrypted +(blocknum*8), 8);
+ bytes_read = fread(enc_dump, 1, 8, f);
+ blocknum++;
+ }
+ fclose(f);
+
+ saveFile(outfilename,"bin", decrypted, blocknum*8);
+
+ return 0;
+}
int CmdHFiClass_iso14443A_write(const char *Cmd)
{
// {"write", CmdHFiClass_iso14443A_write, 0, "Authenticate and Write iClass block"},
{"loclass", CmdHFiClass_loclass, 1, "Use loclass to perform bruteforce of reader attack dump"},
{"eload", CmdHFiClassELoad, 0, "[experimental] Load data into iclass emulator memory"},
+ {"decrypt", CmdHFiClassDecrypt, 1, "Decrypt tagdump" },
{NULL, NULL, 0, NULL}
};
projects / proxmark3-svn / blobdiff