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query, clearing, and cloning. Applies to ciphers, hashes, MACs, and
PBKDFs. May extend to KDFs later as well.
A single combined hierarchy in particular will make the algo_factory
much simpler.
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the parameters of the key length. Instead define a new function which
returns a simple object which contains this information.
This definitely breaks backwards compatability, though only with code
that directly manipulates low level objects like BlockCipher*s
directly, which is probably relatively rare.
Also remove some deprecated accessor functions from lookup.h. It turns
out block_size_of and output_size_of are being used in the TLS code; I
need to remove them from there before I can delete these entirely.
Really that didn't make much sense, because they assumed all
implementations of a particular algorithm will have the same
specifications, which is definitely not necessarily true, especially
WRT key length. It is much safer (and probably simpler) to first
retrieve an instance of the actual object you are going to use and
then ask it directly.
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compatability with 1.8, but actually the signature is completely
different anyway because that version took a Timer object, which
doesn't exist at all anymore.
I suppose I could add an empty Timer class plus subclasses, let
someone instantiate it and pass it in, ignoring it, but I'm not
feeling this is worth the effort. It would make more sense to add a
version with this signature to 1.8, which creates a
Default_Benchmark_Timer and uses it.
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16 KiB buffer. Also reorder the parameters to make somewhat more sense, with the
first arguments being totally mandatory and the later ones potentially optional.
Provide inlined version matching the old interface that just forwards to the
new call, marking it as deprecated.
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This caused Doxygen to think this was markup meant for it, which really
caused some clutter in the namespace page.
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bswap.h); too many external apps rely on loadstor.h existing.
Define 64-bit generic bswap in terms of 32-bit bswap, since it's
not much slower if 32-bit is also generic, and much faster if
it's not. This may be quite helpful on 32-bit x86 in particular.
Change formulation of generic 32-bit bswap. It may be faster or
slower depending on the CPU, especially the latency and throuput
of rotate instructions, but should be faster on an ideally
superscalar processor with rotate instructions (ie, what I expect
future CPUs to look more like).
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QueryPerformanceCounter, into an entropy source hres_timer. Its
results, if any, do not count as contributing entropy to the poll.
Convert the other (monotonic/fixed epoch) timers to a single function
get_nanoseconds_clock(), living in time.h, which statically chooses
the 'best' timer type (clock_gettime, gettimeofday, std::clock, in
that order depending on what is available). Add feature test macros
for clock_gettime and gettimeofday.
Remove the Timer class and timer.h. Remove the Timer& argument to the
algorithm benchmark function.
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Pretty much useless and unused, except for listing the module names in
build.h and the short versions totally suffice for that.
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Remove encrypt, decrypt - replace by cipher() and cipher1()
Remove seek() - not well supported/tested, I want to redo with a new interface
once CTR and OFB modes become stream ciphers.
Rename resync to set_iv()
Remove StreamCipher::IV_LENGTH and add StreamCipher::valid_iv_length() to
allow multiple IV lengths (as for instance Turing allows, as would Salsa20
if XSalsa20 were supported).
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This, I think, was what was causing the OpenSSL AES code to crash (without
a key being set, the rounds are unset and probably causes the code to loop
out past the end of an array somewhere).
Sadly, this also confirms that OpenSSL's AES is much faster than Botan's:
AES-128: 115.032 [core] 152.994 [openssl]
AES-192: 98.6724 [core] 130.087 [openssl]
AES-256: 86.6348 [core] 113.608 [openssl]
Definitely some improvement can be made there! :(
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- rounding.h (round_up, round_down)
- workfactor.h (dl_work_factor)
- timer.h (system_time)
And update all users of the previous util.h
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the info.txt files with the right module dependencies.
Apply it across the codebase.
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up during the Fedora submission review, that each source file include some
text about the license. One handy Perl script later and each file now has
the line
Distributed under the terms of the Botan license
after the copyright notices.
While I was in there modifying every file anyway, I also stripped out the
remainder of the block comments (lots of astericks before and after the
text); this is stylistic thing I picked up when I was first learning C++
but in retrospect it is not a good style as the structure makes it harder
to modify comments (with the result that comments become fewer, shorter and
are less likely to be updated, which are not good things).
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timer alternatives. I realized otherwise each application would be forced
to do the exact same thing, and no reason for that.
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integers where we manipulate values denominated in nanoseconds to avoid
overflow (2^64 nanoseconds = 584.55 years, aka long enough)
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was not the right place to keep track of this information. Also modify
all Algorithm_Factory constructor functions to take instead of a SCAN_Name
a pair of std::strings - the SCAN name and an optional provider name. If
a provider is specified, either that provider will be used or the request
will fail. Otherwise, the library will attempt best effort, based on
user-set algorithm implementation settings (combine with benchmark.h for
choosing the fastest implementation at runtime) or if not set, a static
ordering (preset in static_provider_weight in prov_weight.cpp, though it
would be nice to make this easier to toggle).
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