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+---- Thread: [C] C++ AES GCM 256 (/showthread.php?tid=6130410)
C++ AES GCM 256 - neonbytes - Dec 30, 2020
Hello everyone,
Is there a way to decrypt AES GCM 256 without statically linking any library?
A pure C++ implementation?
Or using Loadlibrary with a DLL (OpenSSL or another crypto) ?
Thank you
RE: C++ AES GCM 256 - Tafelpoot - Dec 30, 2020
https://github.com/kokke/tiny-AES-c
RE: C++ AES GCM 256 - cghhhhasd - Dec 30, 2020
idk what OS ur using but Windows comes with WinCrypt which gives you access to lots of encryption algorithms, hash algorithms, etc.
RE: C++ AES GCM 256 - 0x0SH3 - Dec 30, 2020
You can do it by using WinApi only (header: <Bcrypt.h>) without linking any library. Try to check this repo on github XShar/Fuck_Chrome_C it performs a chromium password decryption using pure C winapi
RE: C++ AES GCM 256 - neonbytes - Jan 4, 2021
(Dec 30, 2020 10:59 AM)Tafelpoot Wrote: github.com/kokke/tiny-AES-c
Thanks, although it says "small and portable implementation of the AES ECB, CTR and CBC encryption algorithms" it does not cover GCM.
RE: C++ AES GCM 256 - guardian - Jan 4, 2021
Of course, those libraries would also be written in C++. Just have a look at their source code and learn how they implemented it. Then implement it in your project.
RE: C++ AES GCM 256 - HFDone - Jan 4, 2021
(Jan 4, 2021 09:46 AM)neonbytes Wrote: Thanks, although it says "small and portable implementation of the AES ECB, CTR and CBC encryption algorithms" it does not cover GCM.
for GCM you will need to use openssl
https://github.com/bawejakunal/AES-GCM-256
RE: C++ AES GCM 256 - DarkVision - Jan 4, 2021
embedtls (formerly PolarSSL)
embedtls has GCM support. (Used it in the RAT to create a cipher to recover passwords for Chrome +v80 browsers).
embedtls also allows you to build (DLL) only using the exports you want.
🙃🙃🙃
RE: C++ AES GCM 256 - neonbytes - Jan 5, 2021
(Dec 30, 2020 02:56 PM)0x0SH3 Wrote: You can do it by using WinApi only (header: <Bcrypt.h>) without linking any library. Try to check this repo on github XShar/Fuck_Chrome_C it performs a chromium password decryption using pure C winapi
Thanks for the info. I was not aware it could be done with winapi only.
It's actually working for Chrome and Edge, but for some reason I cant make it work with Opera.
(Jan 4, 2021 01:58 PM)DarkVision Wrote: embedtls (formerly PolarSSL)
embedtls has GCM support. (Used it in the RAT to create a cipher to recover passwords for Chrome +v80 browsers).
embedtls also allows you to build (DLL) only using the exports you want.
🙃🙃🙃
Thank you will check it out.
RE: C++ AES GCM 256 - aude - Jan 8, 2021
(Dec 30, 2020 10:32 AM)neonbytes Wrote: Hello everyone,
Is there a way to decrypt AES GCM 256 without statically linking any library?
A pure C++ implementation?
Or using Loadlibrary with a DLL (OpenSSL or another crypto) ?
Thank you
LOL damn, i have the exact opposite question as yours.
Today i made a chrome >80 password recoverer, i used libsodium. BUT i failed at doing with static library, but it directly worked on my first dynamic library test
Help me solve this and i give you my code ;)
I know there is this trick, and i did it, but still it doesnt work.. https://github.com/jedisct1/libsodium/issues/247
All working fine with dynamic DLL, so header and .lib are correctly called i guess..
#define SODIUM_STATIC TRUE
extern "C" {
#include "sodium.h"
}
#pragma comment(lib, "libsodium.lib")
fucking lost so much time on this...
Another point is.. with base64 decode part and libsum the exe is not that small.
(Jan 4, 2021 01:58 PM)DarkVision Wrote: embedtls (formerly PolarSSL)
embedtls has GCM support. (Used it in the RAT to create a cipher to recover passwords for Chrome +v80 browsers).
embedtls also allows you to build (DLL) only using the exports you want.
🙃🙃🙃
sound pretty good too
RE: C++ AES GCM 256 - poker - Jan 8, 2021
(Dec 30, 2020 10:32 AM)neonbytes Wrote: Hello everyone,
Is there a way to decrypt AES GCM 256 without statically linking any library?
A pure C++ implementation?
Or using Loadlibrary with a DLL (OpenSSL or another crypto) ?
Thank you
Yes, you can implement your own code or instead use LoadLibray & GetProcAddress in order to call desired functions.