+bool IsCancelled(void) {\r
+ if (ukbhit()) {\r
+ int ch = getchar();\r
+ (void)ch;\r
+ printf("\naborted via keyboard!\n");\r
+ return TRUE;\r
+ }\r
+ return FALSE;\r
+}\r
+\r
+int CmdT55xxBruteForce(const char *Cmd) {\r
+ \r
+ // load a default pwd file.\r
+ char line[9];\r
+ char filename[FILE_PATH_SIZE]={0};\r
+ int keycnt = 0;\r
+ uint8_t stKeyBlock = 20;\r
+ uint8_t *keyBlock = NULL, *p = NULL;\r
+ uint32_t start_password = 0x00000000; //start password\r
+ uint32_t end_password = 0xFFFFFFFF; //end password\r
+ bool found = false;\r
+\r
+ memset(line, 0, sizeof(line));\r
+ \r
+ char cmdp = param_getchar(Cmd, 0);\r
+ if (cmdp == 'h' || cmdp == 'H') return usage_t55xx_bruteforce();\r
+\r
+ keyBlock = calloc(stKeyBlock, 4);\r
+ if (keyBlock == NULL) return 1;\r
+\r
+ if (cmdp == 'i' || cmdp == 'I') {\r
+ \r
+ int len = strlen(Cmd+2);\r
+ if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;\r
+ memcpy(filename, Cmd+2, len);\r
+ \r
+ FILE * f = fopen( filename , "r"); \r
+ if ( !f ) {\r
+ PrintAndLog("File: %s: not found or locked.", filename);\r
+ free(keyBlock);\r
+ return 1;\r
+ } \r
+ \r
+ while( fgets(line, sizeof(line), f) ){\r
+ if (strlen(line) < 8 || line[7] == '\n') continue;\r
+ \r
+ //goto next line\r
+ while (fgetc(f) != '\n' && !feof(f)) ;\r
+ \r
+ //The line start with # is comment, skip\r
+ if( line[0]=='#' ) continue;\r
+\r
+ if (!isxdigit(line[0])) {\r
+ PrintAndLog("File content error. '%s' must include 8 HEX symbols", line);\r
+ continue;\r
+ }\r
+ \r
+ line[8] = 0; \r
+ \r
+ // realloc keyblock array size.\r
+ if ( stKeyBlock - keycnt < 2) {\r
+ p = realloc(keyBlock, 4 * (stKeyBlock += 10));\r
+ if (!p) {\r
+ PrintAndLog("Cannot allocate memory for defaultKeys");\r
+ free(keyBlock);\r
+ if (f)\r
+ fclose(f);\r
+ return 2;\r
+ }\r
+ keyBlock = p;\r
+ }\r
+ // clear mem\r
+ memset(keyBlock + 4 * keycnt, 0, 4);\r
+ \r
+ num_to_bytes( strtoll(line, NULL, 16), 4, keyBlock + 4*keycnt);\r
+ \r
+ PrintAndLog("chk custom pwd[%2d] %08X", keycnt, bytes_to_num(keyBlock + 4 * keycnt, 4) ); \r
+ keycnt++; \r
+ memset(line, 0, sizeof(line));\r
+ } \r
+ if (f)\r
+ fclose(f);\r
+ \r
+ if (keycnt == 0) {\r
+ PrintAndLog("No keys found in file");\r
+ free(keyBlock);\r
+ return 1;\r
+ }\r
+ PrintAndLog("Loaded %d keys", keycnt);\r
+ \r
+ // loop\r
+ uint64_t testpwd = 0x00;\r
+ for (uint16_t c = 0; c < keycnt; ++c ) {\r
+\r
+ if ( offline ) {\r
+ printf("Device offline\n");\r
+ free(keyBlock);\r
+ return 2;\r
+ }\r
+ \r
+ if (IsCancelled()) {\r
+ free(keyBlock);\r
+ return 0;\r
+ }\r
+ \r
+ testpwd = bytes_to_num(keyBlock + 4*c, 4);\r
+\r
+ PrintAndLog("Testing %08X", testpwd);\r
+ \r
+ if ( !AquireData(T55x7_PAGE0, T55x7_CONFIGURATION_BLOCK, TRUE, testpwd)) {\r
+ PrintAndLog("Acquire data from device failed. Quitting");\r
+ free(keyBlock);\r
+ return 0;\r
+ }\r
+ \r
+ found = tryDetectModulation();\r
+ if ( found ) {\r
+ PrintAndLog("Found valid password: [%08X]", testpwd);\r
+ //free(keyBlock);\r
+ //return 0;\r
+ } \r
+ }\r
+ PrintAndLog("Password NOT found.");\r
+ free(keyBlock);\r
+ return 0;\r
+ }\r
+ \r
+ // Try to read Block 7, first :)\r
+ \r
+ // incremental pwd range search\r
+ start_password = param_get32ex(Cmd, 0, 0, 16);\r
+ end_password = param_get32ex(Cmd, 1, 0, 16);\r
+ \r
+ if ( start_password >= end_password ) {\r
+ free(keyBlock);\r
+ return usage_t55xx_bruteforce();\r
+ }\r
+ \r
+ PrintAndLog("Search password range [%08X -> %08X]", start_password, end_password);\r
+ \r
+ uint32_t i = start_password;\r
+\r
+ while ((!found) && (i <= end_password)){\r
+\r
+ printf(".");\r
+ fflush(stdout);\r
+ \r
+ if (IsCancelled()) {\r
+ free(keyBlock);\r
+ return 0;\r
+ }\r
+ \r
+ if (!AquireData(T55x7_PAGE0, T55x7_CONFIGURATION_BLOCK, TRUE, i)) {\r
+ PrintAndLog("Acquire data from device failed. Quitting");\r
+ free(keyBlock);\r
+ return 0;\r
+ }\r
+ found = tryDetectModulation();\r
+ \r
+ if (found) break;\r
+ i++;\r
+ }\r
+ \r
+ PrintAndLog("");\r
+ \r
+ if (found)\r
+ PrintAndLog("Found valid password: [%08x]", i);\r
+ else\r
+ PrintAndLog("Password NOT found. Last tried: [%08x]", --i);\r
+\r
+ free(keyBlock);\r
+ return 0;\r
+}\r
+\r
+int tryOnePassword(uint32_t password) {\r
+ PrintAndLog("Trying password %08x", password);\r
+ if (!AquireData(T55x7_PAGE0, T55x7_CONFIGURATION_BLOCK, TRUE, password)) {\r
+ PrintAndLog("Acquire data from device failed. Quitting");\r
+ return -1;\r
+ }\r
+\r
+ if (tryDetectModulation())\r
+ return 1;\r
+ else \r
+ return 0;\r
+}\r
+\r
+int CmdT55xxRecoverPW(const char *Cmd) {\r
+ int bit = 0;\r
+ uint32_t orig_password = 0x0;\r
+ uint32_t curr_password = 0x0;\r
+ uint32_t prev_password = 0xffffffff;\r
+ uint32_t mask = 0x0;\r
+ int found = 0;\r
+ char cmdp = param_getchar(Cmd, 0);\r
+ if (cmdp == 'h' || cmdp == 'H') return usage_t55xx_recoverpw();\r
+\r
+ orig_password = param_get32ex(Cmd, 0, 0x51243648, 16); //password used by handheld cloners\r
+\r
+ // first try fliping each bit in the expected password\r
+ while (bit < 32) {\r
+ curr_password = orig_password ^ ( 1 << bit );\r
+ found = tryOnePassword(curr_password);\r
+ if (found == -1) return 0;\r
+ bit++;\r
+ \r
+ if (IsCancelled()) return 0;\r
+ }\r
+\r
+ // now try to use partial original password, since block 7 should have been completely\r
+ // erased during the write sequence and it is possible that only partial password has been\r
+ // written\r
+ // not sure from which end the bit bits are written, so try from both ends \r
+ // from low bit to high bit\r
+ bit = 0;\r
+ while (bit < 32) {\r
+ mask += ( 1 << bit );\r
+ curr_password = orig_password & mask;\r
+ // if updated mask didn't change the password, don't try it again\r
+ if (prev_password == curr_password) {\r
+ bit++;\r
+ continue;\r
+ }\r
+ found = tryOnePassword(curr_password);\r
+ if (found == -1) return 0;\r
+ bit++;\r
+ prev_password = curr_password;\r
+ \r
+ if (IsCancelled()) return 0;\r
+ }\r
+\r
+ // from high bit to low\r
+ bit = 0;\r
+ mask = 0xffffffff;\r
+ while (bit < 32) {\r
+ mask -= ( 1 << bit );\r
+ curr_password = orig_password & mask;\r
+ // if updated mask didn't change the password, don't try it again\r
+ if (prev_password == curr_password) {\r
+ bit++;\r
+ continue;\r
+ }\r
+ found = tryOnePassword(curr_password);\r
+ if (found == -1)\r
+ return 0;\r
+ bit++;\r
+ prev_password = curr_password;\r
+ \r
+ if (IsCancelled()) return 0;\r
+ }\r
+\r
+ PrintAndLog("");\r
+\r
+ if (found == 1)\r
+ PrintAndLog("Found valid password: [%08x]", curr_password);\r
+ else\r
+ PrintAndLog("Password NOT found.");\r
+\r
+ return 0;\r
+}\r
+\r
projects / proxmark3-svn / blobdiff