/*
* @arg in_array: array to search in
* @arg out_array: array to write to
* @arg out_file_name: file to write to
* @arg cur_pos: pointer to current position in in_array
* @arg cur_pos_out: pointer to current position in out_array
* @arg print: boolean to check if we have to print or not
* @arg file_size: size of in_array
* @return: none
*/
void sync_word_search(unsigned char *in_array, unsigned char *out_array, char *out_file_name, int *cur_pos, int *cur_pos_out, char *print, int file_size){
unsigned char first, second, third;
char first_time = 1;
//First check for sync word
first = in_array[*cur_pos];
second = in_array[(*cur_pos) + 1];
third = in_array[(*cur_pos) + 2];
(*cur_pos) += 3;
while(!((first + second == 0) && (second + third == 1))){
if(*cur_pos > file_size){
write_out_file(out_array, in_array, out_file_name, *cur_pos_out);
}
if (first_time){
if (*print){
out_array[*cur_pos_out] = first;
out_array[(*cur_pos_out) + 1] = second;
(*cur_pos_out) += 2;
}
first_time = 0;
}
if(*print){
//Write RBSP to the output
out_array[*cur_pos_out] = third;
++(*cur_pos_out);
}
//Roll the list over
first = second;
second = third;
//Try to find sync word
third = in_array[*cur_pos];
++(*cur_pos);
}
}
int
main(int argc, char **argv)
{
GError *error = NULL;
int retval = EXIT_SUCCESS;
EVP_PKEY *pubkey;
if (!process_arguments(&argc, &argv, &error)) {
retval = handle_error(error);
g_clear_error(&error);
} else if ((pubkey = read_public_key(option_key_file, &error)) == NULL) {
retval = handle_error(error);
g_clear_error(&error);
} else {
FILE *infile = fopen(option_data_file, "rb");
if (infile == NULL) {
fprintf(stderr, "%s: %s\n", option_data_file, strerror(errno));
retval = EXIT_IO_ERROR;
} else {
uint8_t hash[SHA256_DIGEST_LENGTH];
uint8_t signature[SIGNATURE_SIZE];
if (fread(signature, 1, sizeof(signature), infile) !=
sizeof(signature)) {
if (ferror(infile)) {
fprintf(
stderr, "%s: %s\n", option_data_file, strerror(errno));
retval = EXIT_IO_ERROR;
} else {
fprintf(stderr,
"%s: File too short for signature\n",
option_data_file);
retval = EXIT_FORMAT_ERROR;
}
} else if (!hash_stream(infile, hash, &error) ||
!verify_signature(hash, signature, pubkey, &error)) {
retval = handle_error(error);
g_clear_error(&error);
} else if (option_out_file &&
!write_out_file(infile, option_out_file, &error)) {
retval = handle_error(error);
g_clear_error(&error);
}
fclose(infile);
}
EVP_PKEY_free(pubkey);
}
return retval;
}
