[Botan-devel] upgrade of included botan for mtn
markus at bluegap.ch
Sat Sep 27 06:09:08 EDT 2008
I've finally taken the time to go through upgrading the included botan
library to 1.7.9 first, then 1.7.12. Some renaming and name conflicts
during merging were a PITA to solve and made me do it in two steps.
The Global_RNG of botan has gone, so I've added a pointer to an RNG to
the app_state, the key_store and the database. Most places using an RNG
have access to a key_store object, so we could maybe even get rid of the
pointer in the database object.
Only mkstemp.cc was puzzling me: I've now changed it to assign its own
RNG. Dunno if that can be optimized to use monotone's, but OTOH it maybe
The Memory_Exhausted exception has now gone, so we don't need a special
check for that and can rely on std::bad_alloc now.
Performance of the SHA-1 remains pretty much the same since we cannot
use the optimized SSE2 variant (+60% sha1 throughput ). That alone is
a good reason to push the library-build branch.
: benchmark results for sha1:
(using "mtn benchmark_sha1"):
default botan sha1: ~ 144 MiB/s
botan_sha1_sse: ~ 234 MiB/s
I've been unable to measure the amd64_asm variant, yet.
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