On Sun, Sep 6, 2020 at 02:37:22PM +0200, Bernhard Übelacker wrote:
> Hello Bruce Momjian,
> thanks for the details and confirmation.
>
>
> Am 05.09.20 um 17:32 schrieb Bruce Momjian,,,:
> > (gdb) print pmeth->init
> > $1 = (int (*)(EVP_PKEY_CTX *)) 0xf0e0d0c0b0a0908
>
> > gdb) print *pmeth
> > $8 = {pkey_id = 50462976, flags = 117835012, init = 0xf0e0d0c0b0a0908,
> > copy = 0x1716151413121110, cleanup = 0x1f1e1d1c1b1a1918, paramgen_init =
> > 0x98c476a19fc273a5, paramgen = 0x9cc072a593ce7fa9,
>
> The pointer init copy and cleanup are really not looking like usual
> pointers or random ...
>
> > I am using a pkcs11 hardware crypto device, and perhaps it is
> > misconfigured, but it probably shouldn't crash. This might be a library
> > bug, not sure. I will check the pkcs11's configuration now, but it used
> > to work.
>
> But I have no knowledge about such crypto hardware, therefore
> I am not sure if I can be of any more help. Maybe you could
> provide the needed packages, libraries and configuration steps
> that are needed to use such a device of yours when starting with
> a fresh debian installation?
I was just able to reproduce this failure on a fresh install of Debian
10.5/Buster. What I did was just to install pkcs11 support:
apt-get install libengine-pkcs11-openssl
and then modify /etc/ssl/openssl.cnf with the attached patch to use
pkcs11 support; 'curl https://google.com' will then segmentation fault.
This server has no pkcs11 hardware; it is an AWS instance. If you
comment out the line:
pkcs11 = pkcs11_section
curl works again. Thanks for your research so far on this.
--
Bruce Momjian <br...@momjian.us> https://momjian.us
EnterpriseDB https://enterprisedb.com
The usefulness of a cup is in its emptiness, Bruce Lee
--- /etc/ssl/openssl.cnf.orig 2019-05-30 11:27:48.000000000 -0400
+++ /etc/ssl/openssl.cnf 2020-09-07 16:02:31.448309714 -0400
@@ -353,6 +353,7 @@
# identifier (optional, default: sha1)
[default_conf]
ssl_conf = ssl_sect
+engines = engine_section
[ssl_sect]
system_default = system_default_sect
@@ -360,3 +361,14 @@
[system_default_sect]
MinProtocol = TLSv1.2
CipherString = DEFAULT@SECLEVEL=2
+
+[engine_section]
+pkcs11 = pkcs11_section
+
+[pkcs11_section]
+# https://github.com/openssl/openssl/blob/master/README.ENGINE
+engine_id = pkcs11
+# same as SO_PATH
+dynamic_path = /usr/lib/x86_64-linux-gnu/engines-1.1/pkcs11.so
+MODULE_PATH = opensc-pkcs11.so
+init = 0
