In the realm of software development, code obfuscation is a crucial technique used to protect source code from unauthorized viewing and modification.
“obfusgator.zig” leverages the Zig programming language to provide a robust tool for developers seeking to obfuscate their Zig projects effectively.
This article delves into how “obfusgator.zig” works and demonstrates its usage on various Zig applications.
A zig program obfusgator
To self obfusgator:
zig run obfusgator.zigTo obfusgator another program:
zig run obfusgator.zig -- myprog.zig// obfusgator.zig, Toby Jaffey 2025-01-07
// zig run obfusgator.zig
// zig run obfusgator.zig -- myprog.zig
const g = & [ _ ] u8 {
31 , 139 , 8 , 8 , 45 , 79 ,
125 , 103 , 0 , 3 , 102 ,
111 , 111 , 46 , 112 , 112 ,
109 , 0 , 237 , 211 ,
203 , 13 ,
131 , 48 , 16 ,
69 , 209 , 172
, 93 , 69 ,
74 , 64 , 40
, 160 , 148
, 65 , 255 ,
205 , 144 , 29
, 66 , 254
, 105 , 226 , 121 ,
248 , 243 , 60 , 119 , 69 , 64
, 25 , 124 , 12 , 28 , 187 ,
251 , 46 , 239 , 207 , 226 , 214 , 109 , 115
, 47 , 75 , 214 , 9 , 170 , 181 , 195 , 15 , 229 , 50 ,
102 , 87 , 77 , 226 , 229 , 19 , 229 , 99 , 117 , 133 , 113 ,
63 , 199 , 48 , 243 , 82 , 50 , 175 , 204 , 203 , 234 , 21 , 74 , 205 ,
59 , 104 , 147 , 48 , 175 , 40 , 189 , 25 , 72 , 91 , 47 , 246 ,
190 , 18 , 136 , 121 , 43 , 236 , 128 , 112 , 172 , 102 ,
109 , 247 , 131 , 251 , 165 , 178 , 153 , 209 , 91 ,
104 , 118 , 62 , 58 , 7 , 178 , 54 , 111 , 44 , 106 ,
38 , 36 , 148 , 215 , 155 , 208 , 173 , 23 , 21 ,
189 , 215 , 179 , 232 , 191 , 172 , 174 , 10 , 23
, 159 , 1 , 142 , 232 , 205 , 188 , 159 , 255 ,
214 , 22 , 34 , 140 , 222 , 171 , 17 , 153 , 119 , 56 ,
111 , 234 , 60 , 153 , 58 , 44 , 197 , 143 , 254 , 60 ,
211 , 251 , 83 , 123 , 221 , 165 , 205 , 230 , 85 , 102 , 94 , 202 , 102 ,
123 , 159 , 139 , 191 , 226 , 212 , 31 , 171 , 13 , 196 , 134 , 218 , 183 ,
231 , 6 , 62 , 212 , 108 , 112 , 243 , 114 , 120 , 127 , 82 , 105 , 15 ,
254 , 141 , 37 , 0 , 0 } ; const z = @import ( "std" ) ; const Ti = z .
zig . Tokenizer
; const T = z . zig . Token ;
const a = z . heap .
page_allocator ; const io = z
. io ; const w = io .
getStdOut ( ) . writer
( ) ; const mem = z . mem ;
const fmt = z . fmt ; const
iobs = io .
fixedBufferStream ;
const u =
undefined ; pub
const P =
struct { d :
[ 2 ] u32 ,
p : [ ] u1 ,
pub fn from (
ls : [ ] const
u8 ) ! P {
var f = iobs ( ls )
; var ln : u32 = 0 ; var p : P =
u ; var lb : [ 1024 * 128 ] u8
= u ; var b = io . bufferedReader (
f . reader ( ) ) ; var r = b . reader ( ) ; while (
true ) { if ( try r . readUntilDelimiterOrEof ( & lb , '\n' ) )
| l | { switch ( ln ) { 1 => { var it = mem . splitAny ( u8 , l , " " )
; for ( 0 .. 2 ) | i | p . d [ i ] = try fmt . parseInt ( u32 , it
. next ( ) . ? , 10 ) ; } , 3 => { p . p = try a . alloc ( u1
, p . d [ 0 ] * p . d [ 1 ] ) ; for ( 0 .. p . d [ 0 ] *
p . d [ 1 ] ) | i | { if ( l [ i * 3 ] > 0 or l [ i * 3
+ 1 ] > 0 or l [ i * 3 + 2 ] > 0 ) { p . p [ i ]
= 1 ; } } break ; } , else => { } , } ln += 1 ; }
} return p ; } } ; fn pt ( src : [ ] const u8 , ts
: [ ] const T , ti : * u32 , ncf : u32 , pws : * bool ) !
void { var nc = ncf ; while ( true ) { if ( ti .* >= ts
. len ) { return ; } const tok = ts [ ti .* ] ; if ( mem . containsAtLeast (
u8 , @tagName ( tok . tag ) , 1 , "comment" ) ) { ti .* += 1 ; continue ; }
var tl : u32 = @intCast ( ( tok . loc . end - tok . loc . start ) + 1 ) ;
if ( ! pws .* ) tl += 1 ; if ( tl <= nc ) { if ( ! pws .* ) _ = try w .
write ( " " ) ;
try w . print ( "{s} " , . {
src [ tok . loc . start .. tok
. loc . end ] } ) ; pws .* =
true ; nc -= tl ; ti .* += 1 ;
} else { for ( 0 .. nc
) | _ | _ = try w . write (
" " ) ; return ; } } } pub
fn main ( ) ! void { _ = try
w . write ( "// zig"
++ " run" ++
" obfusg" ++
"ator.zig" ++
"\n// zig"
++
" run obfus"
++ "gator.zig"
++ " -- m" ++
"yprog" ++
".zig\n" ) ; const
args = try z . process .
argsAlloc ( a ) ; var src : [ :
0 ] const u8 = @embedFile (
"obfusgator.zig" ) ; if ( args . len > 1 ) { const d =
try z . fs . cwd ( ) . readFileAlloc ( a , args [ 1 ] , 1024 *
64 ) ; src = try a . dupeZ ( u8 , d ) ; } var in = iobs ( g ) ; var r :
[ 32768 ] u8 = u ; var ot = iobs ( & r ) ; try z . compress .
gzip . decompress ( in . reader ( ) , ot . writer ( ) ) ;
const p = try P . from ( & r ) ; var e : bool = false ;
var elen : u32 = 0 ; var ts = z . ArrayList ( T ) .
init ( a ) ; var tokenizer = Ti . init ( src ) ;
while ( true ) { const token = tokenizer . next (
) ; try ts . append ( token ) ; if ( token . tag ==
. eof ) break ; } var ti : u32 = 0 ; var pws = true ;
var n : u32 = 0 ; while ( ti < ts . items . len ) { for ( 0 ..
p . d [ 1 ] ) | y | { for ( 0 .. p . d [ 0 ] ) | x | { var nx = x ; if ( n %
2 > 0 ) { nx = ( p . d [ 0 ] - 1 ) - x ; } if ( p . p [ y * p . d [ 0 ] + nx
] > 0 ) { if ( ! e ) { e = true ; elen = 1 ; } else { elen += 1 ; } }
else { if ( e ) { e = false ; try pt ( src , ts . items , & ti , elen , &
pws ) ; } _ = try w
. write ( " " ) ; } } if ( e )
{ e = false ; try pt ( src ,
ts . items , & ti , elen , &
pws ) ; } try w . print ( "\n"
, . { } ) ; if ( ti >=
ts . items . len ) break ; }
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