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* 1.5.6, March 1, 2006
- The low-level DER/BER coding system was redesigned and rewritten
- Portions of the certificate code were cleaned up internally
- Use macros to substantially clean up the GCC assembly code
- Added 32-bit x86 assembly for Visual C++ (by Luca Piccarreta)
- Avoid a couple of spurious warnings under Visual C++
- Some slight cleanups in X509_PublicKey::key_id
* 1.5.5, February 4, 2006
- Fixed a potential infinite loop in the memory pool code (Matt Johnston)
- Made Pooling_Allocator::Memory_Block an actual class of sorts
- Some small optimizations to the division and modulo computations
- Cleaned up the implementation of some of the BigInt operators
- Reduced use of dynamic memory allocation in low-level BigInt functions
- A few simplifications in the Randpool mixing function
- Removed power(), as it was not particularly useful (or fast)
- Fixed some annoying bugs in the benchmark code
- Added a real credits file
* 1.5.4, January 29, 2006
- Integrated x86 and amd64 assembly code, contributed by Luca Piccarreta
- Fixed a memory access off-by-one in the Karatsuba code
- Changed Pooling_Allocator's free list search to a log(N) algorithm
- Merged ModularReducer with its only subclass, Barrett_Reducer
- Fixed sign-handling bugs in some of the division and modulo code
- Renamed the module description files to modinfo.txt
- Further cleanups in the initialization code
- Removed BigInt::add and BigInt::sub
- Merged all the division-related functions into just divide()
- Modified the <mp_asmi.h> functions to allow for better optimizations
- Made the number of bits polled from an EntropySource user configurable
- Avoid including <algorithm> in <botan/secmem.h>
- Fixed some build problems with Sun Forte
- Removed some dead code from bigint_modop
- Fix the definition of same_mem
* 1.5.3, January 24, 2006
- Many optimizations in the low-level multiple precision integer code
- Added hooks for assembly implementations of the MPI code
- Support for the X.509 issuer alternative name extension in new certs
- Fixed a bug in the decompression modules; found and patched by Matt Johnston
- New Windows mutex module (mux_win32), by Luca Piccarreta
- Changed the Windows timer module to use QueryPerformanceCounter
- mem_pool.cpp was using std::set iterators instead of std::multiset ones
- Fixed a bug in X509_CA preventing users from disabling particular extensions
- Fixed the mp_asm64 module, which was entirely broken in 1.5.2
- Fixed some module build problems on FreeBSD and Tru64
* 1.5.2, January 15, 2006
- Fixed an off-by-one memory read in MISTY1::key()
- Fixed a nasty memory leak in Output_Buffers::retire()
- Reimplemented the memory allocator for scratch
- Improved memory caching in Montgomery exponentiation
- Optimizations for multiple precision addition and subtraction
- Fixed a build problem in the hardware timer module on 64-bit PowerPC
- Changed default Karatsuba cutoff to 12 words (was 14)
- Removed MemoryRegion::bits(), which was unused and incorrect
- Changed maximum HMAC keylength to 1024 bits
- Various minor Makefile and build system changes
- Avoid using std::min in <secmem.h> to bypass Windows libc macro pollution
- Switched checks/clock.cpp back to using clock() by default
- Enabled the symmetric algorithm tests, which were accidentally off in 1.5.1
- Removed the Default_Mutex's unused clone() member function
* 1.5.1, January 8, 2006
- Implemented Montgomery exponentiation
- Implemented generalized Karatsuba multiplication and squaring
- Implemented Comba squaring for 4, 6, and 8 word inputs
- Added new Modular_Exponentiator and Power_Mod classes
- Removed FixedBase_Exp and FixedExponent_Exp
- Fixed a performance regression in get_allocator introduced in 1.5.0
- Engines can now offer S2K algorithms and block cipher padding methods
- Merged the remaining global 'algolist' code into Default_Engine
- The low-level MPI code is linked as C again
- Replaced BigInt's get_nibble with the more general get_substring
- Some documentation updates
* 1.5.0, January 1, 2006
- Moved all global/shared library state into a single object
- Mutex objects are created through mutex factories instead of a global
- Removed ::get_mutex(), ::initialize_mutex(), and Mutex::clone()
- Removed the RNG_Quality enum entirely
- There is now only a single global-use PRNG
- Removed the no_aliases and no_oids options for LibraryInitializer
- Removed the deprecated algorithms SEAL, ISAAC, and HAVAL
- Change es_ftw to use unbuffered I/O
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