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License: GNU General Public License v3.0
Chad Strings - The Chad way to handle strings in C.
License: GNU General Public License v3.0
I know even if this is a kind-of meme, it's a severe limitation for my personal use.
I guess compilers ain't that smart after all....
Now I am back at the dumb strdup
stuff I've been struggling with :(
take example code generate random strings and compile with sanitizers.
$ gcc -fsanitize=address main.c
# ./a.out
=================================================================
==567==ERROR: AddressSanitizer: dynamic-stack-buffer-overflow on address 0x7ffe55e4a198 at pc 0x55b34322c058 bp 0x7ffe55e4a0e0 sp 0x7ffe55e4a0d8
WRITE of size 1 at 0x7ffe55e4a198 thread T0
#0 0x55b34322c057 in random_string (/root/chadstr/a.out+0x4057)
#1 0x55b34322c1f6 in main (/root/chadstr/a.out+0x41f6)
#2 0x7f2811d11d09 in __libc_start_main ../csu/libc-start.c:308
#3 0x55b34322a249 in _start (/root/chadstr/a.out+0x2249)
Address 0x7ffe55e4a198 is located in stack of thread T0
SUMMARY: AddressSanitizer: dynamic-stack-buffer-overflow (/root/chadstr/a.out+0x4057) in random_string
Shadow bytes around the buggy address:
0x10004abc13e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x10004abc13f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x10004abc1400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x10004abc1410: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x10004abc1420: ca ca ca ca 00 00 00 00 00 00 00 00 00 00 00 00
=>0x10004abc1430: 00 00 00[cb]cb cb cb cb 00 00 00 00 00 00 00 00
0x10004abc1440: 00 00 00 00 00 00 f1 f1 f1 f1 00 f2 f2 f2 00 00
0x10004abc1450: f3 f3 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1
0x10004abc1460: 00 f3 f3 f3 00 00 00 00 00 00 00 00 00 00 00 00
0x10004abc1470: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x10004abc1480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Shadow byte legend (one shadow byte represents 8 application bytes):
Addressable: 00
Partially addressable: 01 02 03 04 05 06 07
Heap left redzone: fa
Freed heap region: fd
Stack left redzone: f1
Stack mid redzone: f2
Stack right redzone: f3
Stack after return: f5
Stack use after scope: f8
Global redzone: f9
Global init order: f6
Poisoned by user: f7
Container overflow: fc
Array cookie: ac
Intra object redzone: bb
ASan internal: fe
Left alloca redzone: ca
Right alloca redzone: cb
Shadow gap: cc
==567==ABORTING
$
Lots of vulns, please consider creating a Rust version.
main.c
#include "chadstr.h"
int main() {
chadstr test = str("orange apple");
return 0;
}
The result when I try to compile it:
D:\workspace\chadstr>cl /I. main.c
Microsoft (R) C/C++ Optimizing Compiler Version 19.28.29915 for x86
Copyright (C) Microsoft Corporation. All rights reserved.
main.c
D:\workspace\chadstr\chadstr.h(69): fatal error C1112: compiler limit: '129' too many macro arguments, only '127' allowed
All identifiers starting with two underscores are reserved, see https://port70.net/~nsz/c/c11/n1570.html#7.1.3
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