Greetings!!!
We have developed an engine with our own AES
implementation.(PFA engine file - sw_cryptodev.c).
This was a modification of the hw_cryptodev.c engine
file provided with the openssl source code. The engine
is getting loaded, keys are getting initialized and
even encryption/decryption is done correctly.We tried
this with file encryption. But after the decryption a
segmentation fault occurs. While debugging we found
that after it returns from our decryption routing the
following happens:
apps/enc.c
Line number 593 if (in != NULL) BIO_free(in);
crypto/bio/bio_lib.c within BIO_free method it calls
file_free
crypto/bio/bss_file.c within the file_free the
segmentation fault occurs
We tried commenting out the BIO_free calls in
apps/enc.c. But then the segmentation fault shifted to
the following flow
apps/enc.c
apps_shutdown();
crypto/ex_data.c
static void int_cleanup(void)
{
EX_DATA_CHECK(return;)
// lh_doall(ex_data, def_cleanup_cb); -->
internally calls def_cleanup_cb which seg faults.
// lh_free(ex_data);
ex_data = NULL;
impl = NULL;
}
We commented out the two lines as shown above and the
code now works fine.
After all this we tried using the openvpn (open source
VPN solution) which uses openssl.But the application
also shows a segmentation fault which was not shown
with the original openssl.
We feel that the problem should be in our engine code.
Please help us in this matter.
Thanks in advance
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sw_cryptodev.c
Description: pat1251177750
