From 08fb644c7d101551edfe8fc2608e0ac501b3df9f Mon Sep 17 00:00:00 2001
From: "@syxhe" <https://t.me/syxhe>
Date: Sun, 8 Jun 2025 17:25:13 -0500
Subject: Trim the fat

---
 src/encryption.c | 56 ++++++++++++++++++++++----------------------------------
 1 file changed, 22 insertions(+), 34 deletions(-)

(limited to 'src/encryption.c')

diff --git a/src/encryption.c b/src/encryption.c
index 3bf9dd4..b6832ed 100644
--- a/src/encryption.c
+++ b/src/encryption.c
@@ -1,4 +1,7 @@
 // TODO: Go back and make sure every function has proper error handling
+// Oh fucking christ what have I done
+// I need to make sure every single function in this file returns with an indicated error instead of nuking the whole program with
+//  error()
 
 #define _GNU_SOURCE
 
@@ -27,7 +30,7 @@ void naclfaildefault(void *none) {
     exit(EXIT_FAILURE);
 }
 
-int checksodiumcb(const vxgg_naclfailcb callback, void *data, unsigned char set) {
+int checksodiumcb(vxgg_naclfailcb const callback, void *data, unsigned char set) {
     static vxgg_naclfailcb cb = naclfaildefault;
     static void *usr = NULL;
     int ret;
@@ -84,7 +87,9 @@ int linkto(const char * const target, int tgfd) {
     if(!path)
         ERROR(1, errno, "<linkto> Couldn't get path to move file into system",);
     remove(target); // Make sure an old version isn't sticking around (it's not catastrophic if this fails, but it should be noted or logged somewhere)
-    return linkat(AT_FDCWD, path, AT_FDCWD, target, AT_SYMLINK_FOLLOW);
+    int res = linkat(AT_FDCWD, path, AT_FDCWD, target, AT_SYMLINK_FOLLOW);
+    free(path);
+    return res;
 }
 
 int encryptviatmp(const char * const target, const char * const output, const unsigned char key[crypto_secretstream_xchacha20poly1305_KEYBYTES]) {
@@ -127,17 +132,11 @@ int encryptviatmp(const char * const target, const char * const output, const un
 }
 
 int decryptto(const char * const encrypted, const char * const target, const unsigned char key[crypto_secretstream_xchacha20poly1305_KEYBYTES]) {
+    if(!encrypted || !target || !key) ERRRET(EINVAL, -1);
     #if ___VXGG___ALWAYS_CHECK_LIBSODIUM___ > 0
         checksodium();
     #endif
-
-    if(!encrypted)
-        ERRRET(EINVAL, -1);
-    if(!target)
-        ERRRET(EINVAL, -1);
-    if(!key)
-        ERRRET(EINVAL, -1);
-
+    
     FILE *src, *dst;
     if(!(src = fopen(encrypted, "rb")))
         ERROR(1, errno, "<decryptto> Could not open \"%s\" for decryption", , encrypted);
@@ -164,6 +163,11 @@ int decryptto(const char * const encrypted, const char * const target, const uns
 }
 
 int encrypttofile(FILE *src, FILE *dst, const unsigned char key[crypto_secretstream_xchacha20poly1305_KEYBYTES]) {
+    if(!src || !dst || !key) ERRRET(EINVAL, -1);
+    #if ___VXGG___ALWAYS_CHECK_LIBSODIUM___ > 0
+        checksodium();
+    #endif
+
     unsigned char  buf[CHUNKSIZE], cbuf[CHUNKSIZE + crypto_secretstream_xchacha20poly1305_ABYTES];
     unsigned char  header[crypto_secretstream_xchacha20poly1305_HEADERBYTES];
     crypto_secretstream_xchacha20poly1305_state state;
@@ -172,17 +176,6 @@ int encrypttofile(FILE *src, FILE *dst, const unsigned char key[crypto_secretstr
     size_t bytesread;
     int eof;
 
-    #if ___VXGG___ALWAYS_CHECK_LIBSODIUM___ > 0
-        checksodium();
-    #endif
-
-    if(!src)
-        ERRRET(EINVAL, -1);
-    if(!dst)
-        ERRRET(EINVAL, -1);
-    if(!key)
-        ERRRET(EINVAL, -1);
-
     // Write the header
     crypto_secretstream_xchacha20poly1305_init_push(&state, header, key);
     if(fwrite(header, 1, sizeof(header), dst) < sizeof(header))
@@ -206,7 +199,12 @@ int encrypttofile(FILE *src, FILE *dst, const unsigned char key[crypto_secretstr
     return 0;
 }
 
-int decrypttofile(FILE *src, FILE *dst, const unsigned char key[crypto_secretstream_xchacha20poly1305_KEYBYTES]) {
+int decrypttofile(FILE *src, FILE *dst, const unsigned char key[crypto_secretstream_xchacha20poly1305_KEYBYTES]) {    
+    if(!src || !dst || !key) ERRRET(EINVAL, -1);    
+    #if ___VXGG___ALWAYS_CHECK_LIBSODIUM___ > 0
+        checksodium();
+    #endif
+
     unsigned char  cbuf[CHUNKSIZE + crypto_secretstream_xchacha20poly1305_ABYTES], buf[CHUNKSIZE];
     unsigned char  header[crypto_secretstream_xchacha20poly1305_HEADERBYTES];
     crypto_secretstream_xchacha20poly1305_state state;
@@ -215,17 +213,6 @@ int decrypttofile(FILE *src, FILE *dst, const unsigned char key[crypto_secretstr
     size_t bytesread;
     int eof;
     
-    #if ___VXGG___ALWAYS_CHECK_LIBSODIUM___ > 0
-        checksodium();
-    #endif
-
-    if(!src)
-        ERRRET(EINVAL, -1);
-    if(!dst)
-        ERRRET(EINVAL, -1);
-    if(!key)
-        ERRRET(EINVAL, -1);
-
     // Read the header
     if(fread(header, 1, sizeof(header), src) < sizeof(header))
         if(ferror(src))
@@ -258,7 +245,8 @@ int decrypttofile(FILE *src, FILE *dst, const unsigned char key[crypto_secretstr
 
 int genpassword(char **str, unsigned int words) {
     // Early returns
-    if(words < 1) {return 0;}
+    if(words < 1) return 0;
+    if(!str) ERRRET(EINVAL, -1);
     #if ___VXGG___ALWAYS_CHECK_LIBSODIUM___ > 0
         checksodium();
     #endif
-- 
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