Am Sonntag, 25. Oktober 2015, 11:56:27 schrieb Harsh Jain: Hi Harsh, >Hi, > > >When trying to calculate HMAC(SHA1) with openssl using af-alg engine >kernel crashes.Find below the command used and kernel. I have added >some debug print in logs. > >Command used : ./openssl dgst -engine af_alg -sha1 -hmac "key" r.txt >kernel version : 3.17.8 > >Initial Investigation : In shash_desc structure tfm pointer contains >5a5a5a5a5a5a5a5a(invalid pointer), when it triess to reference export >function pointer it crashes. As per my understanding tfm object should >have pointer of memory bloack allocated in >"crypto_init_shash_ops_async" function > >Please give some pointers to debug the issue.Any documentation to >understand the crypto-api code. May I ask you to send 2 things: the source code of the OpenSSL af_alg engine that you use (IIRC it is not included upstream, I want to be sure I used the right one). Further, can you attach an strace of the aforementioned command? Note, I am playing and abusing the AF_ALG interface for quite some time with [1] but I did not come across any issues like the one you describe here. [1] http://www.chronox.de/libkcapi.html Ciao Stephan -- To unsubscribe from this list: send the line "unsubscribe linux-crypto" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
