Decrypt StringData.NOS

SUBMITTED BY: Guest

DATE: June 25, 2014, 6:59 p.m.

FORMAT: C++

SIZE: 2.9 kB

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  1. /* @ NosTale Text File Extractor @ */
  3. //--INCLUDES--
  4. #include <iostream>
  5. #include <sstream>
  6. //--INCLUDES--
  8. //--Decrypt text file--
  9. int decryptnosfile(unsigned char *cData, unsigned int f_buffer, unsigned char *cOut, unsigned int &nOut)
  10. {
  11. static unsigned char table[] = { 0, 0x20,'-','.','0','1','2','3','4','5','6','7','8','9', 0x0d };
  12. unsigned int i, offset, len;
  13. unsigned char size, c;
  14. len = f_buffer;
  15. unsigned char *cBuffer;
  16. cBuffer = (unsigned char*)malloc(f_buffer + 1);
  17. memcpy(cBuffer, cData, f_buffer);
  18. offset = nOut = 0;
  19. while(offset < len)
  20. {
  21. if(cBuffer[offset] == 0xFFu)
  22. {
  23. offset++;
  24. *(cOut + nOut++) = 0x0d;
  25. continue;
  26. }
  27. size = cBuffer[offset++];
  28. i = 0;
  29. if ((size & 0x80U) == 0)
  30. {
  31. while ((i++ < size) && (offset < len))
  32. {
  33. *(cOut + nOut++) = (cBuffer[offset++] ^ 0x33U);
  34. }
  35. }
  36. else
  37. {
  38. size &= 0x7FU;
  39. while ((i < size) && (offset < len))
  40. {
  41. c = cBuffer[offset++];
  42. *(cOut + nOut++) = (table[(c & 0xF0U) >> 4]);
  43. if (table[c & 0x0FU] != 0)
  44. *(cOut + nOut++) = table[c & 0x0FU];
  45. i += 2;
  46. }
  47. }
  48. }
  49. free(cBuffer);
  50. return offset;
  51. }
  52. //--Decrypt text file--
  54. //--MAIN--
  55. void main()
  56. {
  57. std::string infile_name;
  58. unsigned int file_num, file_count, file_name_size, file_crypto_mode, file_size;
  59. FILE *inFile, *outFile;
  60. std::cout
  61. << " NTExtractor" << std::endl
  62. << " Write file name: ";
  63. std::cin >> infile_name;
  64. inFile = fopen(infile_name.c_str(),"rb");
  65. if(inFile == NULL)
  66. return;
  67. fread(&file_num, 1, 4, inFile);
  68. std::cout << file_num << " files found" << std::endl;
  69. for(auto i = 0; i < file_num; i++)
  70. {
  71. fread(&file_count, 1, 4, inFile);
  72. fread(&file_name_size, 1, 4, inFile);
  73. char *file_name = (char*)malloc(file_name_size+1);
  74. fread(file_name, 1, file_name_size, inFile);
  75. file_name[file_name_size] = 0;
  76. fread(&file_crypto_mode, 1, 4, inFile);
  77. fread(&file_size, 1, 4, inFile);
  78. unsigned char *file = (unsigned char*)malloc(file_size+1);
  79. fread(file, 1, file_size, inFile);
  80. file[file_size] = 0;
  81. std::cout << " File [" << file_count << "] '"<< file_name <<"' size: " << file_size / 1024 << "KB" << std::endl;
  82. outFile = fopen(file_name,"wb");
  83. unsigned char *file_decrypted = (unsigned char*)malloc(2*file_size);
  84. unsigned int file_decrypted_lenght = 0;
  85. decryptnosfile(file, file_size, file_decrypted, file_decrypted_lenght);
  86. fwrite(file_decrypted,1, file_decrypted_lenght,outFile);
  87. std::cout << " The file are decrypted and saved!" << std::endl;
  88. fclose(outFile);
  89. }
  90. fclose(inFile);
  91. std::cout << " Files extracted correctly" << std::endl;
  92. _sleep(1000);
  93. }
  94. //--MAIN--
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