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#define _GNU_SOURCE
#include "encryption.h"
#include "shared.h"
#include <sodium.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <stdarg.h>
#include <unistd.h>
#include <errno.h>
#include <error.h>
#include <fcntl.h>
#include <stdio.h>
int checkSodium(void) {
int ret = sodium_init();
if(ret < 0)
error(1, ENOTSUP, "Couldn't initialize sodium for some reason. Quitting...");
return ret;
}
// To encrypt:
// 1- Create a temp file with the correct name in the root folder of the partition being encrypted
// 1.1- Detect the partition and find the root folder
// 1.2- Create the temp file with the correct name
// 2- Encrypt the file's contents to the temp file
// 2.1- Open the file
// 2.2- Stream the file's contents into some encryption algo
// 2.3- Pipe the output of the encryption into the temp file
// 3- Once the file has been encrypted, hard link it back to the original location
// 4- Delete the original file
// 5- Delete the temp file
int maketmp(const char *dest, const char *format, ...) {
char *filename = NULL, *fullpath = NULL;
struct stat fb;
int fd = -1;
va_list ap;
// Make sure the destination exists and is a directory
if(stat(dest, &fb) < 0)
return -1;
if(!S_ISDIR(fb.st_mode))
return -2;
// Get the first half of the filename
va_start(ap, format);
if(vasprintf(&filename, format, ap) < 0)
return -3;
va_end(ap);
// Get the second half of the filename
int fps = asprintf(&fullpath, "%s%s", dest, filename); // Hack to not duplicate `free(filename)`
free(filename);
if(fps < 0)
return -4;
// Open the temp file
if((fd = open(dest, (O_WRONLY | O_CLOEXEC | O_CREAT | O_TMPFILE), S_IWUSR)) < 0)
fd = -5;
free(fullpath);
return fd;
}
int main(int argc, char *argv[]) {
if(argc != 3)
error(1, 0, "USAGE: <dest> <filename>");
int fd = maketmp(argv[1], "%s.test", argv[2]);
if(fd < 0)
error(1, errno, "Couldn't open temp file");
return 0;
}
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