[openssl-users] Possible bug in crypto/engine

Dr. Matthias St. Pierre Matthias.St.Pierre at ncp-e.com
Sun Jan 6 22:53:06 UTC 2019


did you debug the preinstalled openssl app or have you tried to debug your own version, built with a debug configuration?

You get the best results in the debugger if you use the `debug-linux-x86_64` config target and
after building (you only need to run `make`, not `make install`) run it in the debugger directly from the source
directory as follows:

    util/shlib_wrap.sh  gdb  apps/openssl cms -sign -signer cert.pem -inkey 101 -keyform engine -engine pkcs11

If you can reproduce the crash with your debug version, please post a backtrace of the call stack when it’s stopped
at the segmentation fault.


Von: openssl-users <openssl-users-bounces at openssl.org> Im Auftrag von Antonio Iacono
Gesendet: Sonntag, 6. Januar 2019 19:55
An: openssl-users at openssl.org
Betreff: [openssl-users] Possible bug in crypto/engine


I sign a text file with:
openssl cms -sign -signer cert.pem -inkey 01 -keyform engine -engine pkcs11
in openssl.cnf
engine_id = pkcs11
dynamic_path = /path/pkcs11.so
MODULE_PATH = /path/opensc-pkcs11.so
everything works well but if I write a wrong key, es. -inkey 101, this is gdb result:

PKCS11_get_private_key returned NULL
cannot load signing key file from engine
140737353990592:error:26096080:engine routines:ENGINE_load_private_key:failed loading private key:crypto/engine/eng_pkey.c:78:
unable to load signing key file
Program received signal SIGSEGV, Segmentation fault.
__GI___pthread_rwlock_wrlock (rwlock=0x0) at pthread_rwlock_wrlock.c:27
27    pthread_rwlock_wrlock.c: No such file or directory

I realized that the error is probably here:
crypto/engine/eng_lib.c line 93
if (e->destroy)
CRYPTO_free_ex_data(CRYPTO_EX_INDEX_ENGINE, e, &e->ex_data);
if I comment these lines openssl does not crash

I do not know engine well and I do not know what these two lines do, if anyone has any suggestions I can do some tests

Antonio Iacono
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