MingW missing some functions from the Win32 Crypto API

Question

I need to use some functions from the Win32 Crypto API, such as CryptQueryObject. The problem is that I also need to compile my program with MingW and the crypto library included is missing some of the functions that I need, like the aformentioned CryptQueryObject. I tried copying the relevant C header definitions, so that the program now compiles, but at link time it fails with undefined reference errors (since mingw's crypt32.dll doesn't implement some functions). I tried linking against C:\Windows\System32\crypt32.dll, but it still returns linking errors.

Is there a way to use the entire Crypto API in mingw?

Why not download the [entire Windows SDK](http://www.microsoft.com/download/en/details.aspx?id=8279)? Surely you can use that from MinGW. — Cody Gray - on strike, Dec 17 '11 at 13:13

score 1 · Accepted Answer · edited Apr 12 '23 at 17:13

1

You need to dynamically link to crypt32.dll. You can either do this at runtime using Win32 API functions LoadLibrary + GetProcAddress, or at compile time using an import library.

For runtime binding, MSDN has a good example.

EDIT: If you need a bunch of API functions not present in MinGW's headers, go for the import library.

edited Apr 12 '23 at 17:13

Koliw

28
1
6

answered Dec 16 '11 at 16:29

user1071136

15,636
4
42
61

Another good example is in the openssl library in the file /crypto/rand/rand_win.c – President James K. Polk Dec 16 '11 at 22:10
This is bad advice. Don't mix Microsoft's SDK/MSDN with MinGW. If the functions are missing in your MinGW it's because it's too old. Use newer MinGW-w64 instead. – Brecht Sanders Apr 16 '23 at 07:46

score 0 · Answer 2 · answered Dec 18 '17 at 12:24

0

I had the same problem. Download and install the Windows SDK.

Now call the linker:

gcc -L"C:\Program Files (x86)\Windows Kits\10\Lib\10.0.14393.0\um\arm" -o "Test"  ./main.o -lcrypt32

answered Dec 18 '17 at 12:24

Jonny Schubert

1,393
2
18
39

No, don't mix MinGW with Microsoft's SDK. That will mess up things more as there are 2 different implementations that should bot be mixed. – Brecht Sanders Apr 13 '23 at 11:52

score 0 · Answer 3 · answered Apr 13 '23 at 11:56

0

Maybe you are using an old version of MinGW, because the crypto stuff is present in recent versions like MinGW-w64. Get the latest version via MSYS2's package manager pacman or use a standalone build from https://winlibs.com

answered Apr 13 '23 at 11:56

Brecht Sanders

6,215
1
16
40

MingW missing some functions from the Win32 Crypto API

3 Answers3

Linked