ssn-installer/src/main.c

#include <errno.h>
#include <stdio.h>
#include <string.h>

//Import our code
#include "decrypt.h"
#include "fileReader.h"
#include "utils/min.h"

int main(int argc, unsigned char *argv[]) {
  printf("Hello World!\n");
  //TODO: verify argv and assign it to variables
  char* archiveName = "1234";
  const unsigned long archiveOffset = 0UL;
  const unsigned long fileLength = 0xffffUL;
  uint32_t key0 = 0;
  uint32_t key1 = 0;
  uint32_t key2 = 0;

  //Initialise file reader
  initFileReader(archiveName, archiveOffset);

  //Skip header (30 bytes + additional length)
  char* fileHeader = getBytes(30UL);
  printf(fileHeader);
  //TODO: check that header is correct
  //TODO: read additional length
  const unsigned long additionalLength = 0UL;
  getBytes(additionalLength);

  //Initialise decryption (pass decryption keys)
  initDecryptor(key0, key1, key2);

  //Skip 12-byte encryption header
  const unsigned long encrHeaderLength = 12UL;
  char* encrHeader = getBytes(encrHeaderLength);
  decrypt(encrHeader, encrHeaderLength);

  //Read actual file
  unsigned long remainingBytes = fileLength;
  while (remainingBytes > 0) {
    const unsigned long chunkSize = min(0xFF, remainingBytes);
    char* chunk = getBytes(chunkSize);
    remainingBytes -= chunkSize;

    decrypt(chunk, chunkSize);

    //Decompress file
    //TODO

    //Optionally perform xdelta3
    //TODO
  }

  return 0;
}