Bug#828614: yara: FTBFS with openssl 1.1.0

[Hilko Bengen]

* Kurt Roeckx:

> On Mon, Jun 27, 2016 at 12:46:26AM +0200, Hilko Bengen wrote:
>> control: tag -1 moreinfo
>> 
>> Hi Kurt,
>> 
>> I was able to get the yara build fixed by applying this simple patch:
>> 
>> -      const char* sig_alg = OBJ_nid2ln(OBJ_obj2nid(cert->sig_alg->algorithm));
>> +      const char* sig_alg = OBJ_nid2ln(X509_get_signature_nid(cert));
>> 
>> However, since I don't really know a lot about OpenSSL's internals, I'm
>> not sure if the fix is actually correct.
>
> Yes, that looks correct.

I have some more questions:

YARA upstream has added some things, leading to further breakage with
OpenSSL 1.1:

1. CRYPTO_LOCK is no longer defined, apparently because some locking
   functions have been removed:

   - CRYPTO_num_locks()
   - CRYPTO_set_id_callback()
   - CRYPTO_set_locking_callback()
   - CRYPTO_num_locks()

   What API am I supposed to use instead ... and is it also available
   with previous versions of OpenSSL?

2. i2c_ASN1_INTEGER() is no longer available outside the OpenSSL code
   base. What am I supposed to use instead? (What is this "context
   encoding", anyway?)

Cheers,
-Hilko