Req.exe is crashing with error "OPENSSL_Uplink(00007FFE08E3F5F8,08): no OPENSSL_Applink" on Windows Server 2022 VM

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Req.exe is crashing with error "OPENSSL_Uplink(00007FFE08E3F5F8,08): no OPENSSL_Applink" on Windows Server 2022 VM as below-:

C:\utilities>req.exe -out clientreq -newkey rsa:2048 -keyout mykey -verbose
Using configuration from C:\Program Files\Common Files\SSL/openssl.cnf
Generating rsa key with 2048 bits
......
Writing private key to 'mykey'
OPENSSL_Uplink(00007FFE0914F5F8,08): no OPENSSL_Applink
C:\utilities>

Req.exe is compiled with MSVC2022.

When I made below changes in the apps.c at line 3071 (in function bio_open_owner) -:

//b = BIO_new_fp(fp, bflags);   // commented this line
b = BIO_new_file(filename, "w"); // Added this line

Crash issue is resolved.

Please suggest solution for this behavior. If above change is ok, then I can raise a pull request as well for the same.

[mattcaswell]

How did you create req.exe? That isn't a standard OpenSSL executable - that is called openssl.exe.

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In our product, a Makefile is written to copy req.c and other required files at a separate folder and compile the same to generate the req.exe.

[mattcaswell]

You should compile and link uplink.c into your req.exe:

https://github.com/openssl/openssl/blob/master/ms/uplink.c

See:
https://www.openssl.org/docs/man3.3/man3/OPENSSL_Applink.html

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I have added uplink.c and its dependent files to created req.exe, but now I am getting below error-:

uplink.obj : error LNK2019: unresolved external symbol OPENSSL_showfatal referenced in function unimplemented
test_Windows_NT\reqtest.exe : fatal error LNK1120: 1 unresolved externals
make[6]: *** [../../../../../make/Makefile.test:68: test_Windows_NT/reqtest.exe] Error 2

OPENSSL_showfatal symobl not present in libcrypo.lib and libssl.lib.

[tom-cosgrove-arm]

In our product, a Makefile is written to copy req.c and other required files

OPENSSL_showfatal symobl not present in libcrypo.lib and libssl.lib

OPENSSL_showfatal comes from crypto/cryptlib.c

NOTE: You are unlikely to get much more help trying to debug a completely non-standard build of OpenSSL

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I am able to created req.exe after adding libcrypt.c along with other files. And provided option -DOPENSSL_USE_APPLINK during compilation. Req.exe still crashing with - OPENSSL_Uplink(00007FFE0914F5F8,08): no OPENSSL_Applink.
Behavior is same without compilation option -DOPENSSL_USE_APPLINK.