404 lines
24 KiB
Plaintext
404 lines
24 KiB
Plaintext
July 23rd, 2010
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v0.42.0
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-- Fix for mp_prime_next_prime() bug when checking generated prime
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-- allow mp_shrink to shrink initialized, but empty MPI's
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-- Added project and solution files for Visual Studio 2005 and Visual Studio 2008.
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March 10th, 2007
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v0.41 -- Wolfgang Ehrhardt suggested a quick fix to mp_div_d() which makes the detection of powers of two quicker.
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-- [CRI] Added libtommath.dsp for Visual C++ users.
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December 24th, 2006
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v0.40 -- Updated makefile to properly support LIBNAME
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-- Fixed bug in fast_s_mp_mul_high_digs() which overflowed (line 83), thanks Valgrind!
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April 4th, 2006
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v0.39 -- Jim Wigginton pointed out my Montgomery examples in figures 6.4 and 6.6 were off by one, k should be 9 not 8
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-- Bruce Guenter suggested I use --tag=CC for libtool builds where the compiler may think it's C++.
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-- "mm" from sci.crypt pointed out that my mp_gcd was sub-optimal (I also updated and corrected the book)
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-- updated some of the @@ tags in tommath.src to reflect source changes.
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-- updated email and url info in all source files
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Jan 26th, 2006
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v0.38 -- broken makefile.shared fixed
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-- removed some carry stores that were not required [updated text]
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November 18th, 2005
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v0.37 -- [Don Porter] reported on a TCL list [HEY SEND ME BUGREPORTS ALREADY!!!] that mp_add_d() would compute -0 with some inputs. Fixed.
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-- [rinick@gmail.com] reported the makefile.bcc was messed up. Fixed.
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-- [Kevin Kenny] reported some issues with mp_toradix_n(). Now it doesn't require a min of 3 chars of output.
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-- Made the make command renamable. Wee
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August 1st, 2005
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v0.36 -- LTM_PRIME_2MSB_ON was fixed and the "OFF" flag was removed.
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-- [Peter LaDow] found a typo in the XREALLOC macro
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-- [Peter LaDow] pointed out that mp_read_(un)signed_bin should have "const" on the input
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-- Ported LTC patch to fix the prime_random_ex() function to get the bitsize correct [and the maskOR flags]
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-- Kevin Kenny pointed out a stray //
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-- David Hulton pointed out a typo in the textbook [mp_montgomery_setup() pseudo-code]
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-- Neal Hamilton (Elliptic Semiconductor) pointed out that my Karatsuba notation was backwards and that I could use
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unsigned operations in the routine.
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-- Paul Schmidt pointed out a linking error in mp_exptmod() when BN_S_MP_EXPTMOD_C is undefined (and another for read_radix)
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-- Updated makefiles to be way more flexible
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March 12th, 2005
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v0.35 -- Stupid XOR function missing line again... oops.
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-- Fixed bug in invmod not handling negative inputs correctly [Wolfgang Ehrhardt]
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-- Made exteuclid always give positive u3 output...[ Wolfgang Ehrhardt ]
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-- [Wolfgang Ehrhardt] Suggested a fix for mp_reduce() which avoided underruns. ;-)
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-- mp_rand() would emit one too many digits and it was possible to get a 0 out of it ... oops
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-- Added montgomery to the testing to make sure it handles 1..10 digit moduli correctly
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-- Fixed bug in comba that would lead to possible erroneous outputs when "pa < digs"
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-- Fixed bug in mp_toradix_size for "0" [Kevin Kenny]
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-- Updated chapters 1-5 of the textbook ;-) It now talks about the new comba code!
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February 12th, 2005
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v0.34 -- Fixed two more small errors in mp_prime_random_ex()
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-- Fixed overflow in mp_mul_d() [Kevin Kenny]
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-- Added mp_to_(un)signed_bin_n() functions which do bounds checking for ya [and report the size]
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-- Added "large" diminished radix support. Speeds up things like DSA where the moduli is of the form 2^k - P for some P < 2^(k/2) or so
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Actually is faster than Montgomery on my AMD64 (and probably much faster on a P4)
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-- Updated the manual a bit
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-- Ok so I haven't done the textbook work yet... My current freelance gig has landed me in France till the
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end of Feb/05. Once I get back I'll have tons of free time and I plan to go to town on the book.
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As of this release the API will freeze. At least until the book catches up with all the changes. I welcome
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bug reports but new algorithms will have to wait.
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December 23rd, 2004
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v0.33 -- Fixed "small" variant for mp_div() which would munge with negative dividends...
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-- Fixed bug in mp_prime_random_ex() which would set the most significant byte to zero when
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no special flags were set
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-- Fixed overflow [minor] bug in fast_s_mp_sqr()
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-- Made the makefiles easier to configure the group/user that ltm will install as
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-- Fixed "final carry" bug in comba multipliers. (Volkan Ceylan)
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-- Matt Johnston pointed out a missing semi-colon in mp_exptmod
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October 29th, 2004
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v0.32 -- Added "makefile.shared" for shared object support
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-- Added more to the build options/configs in the manual
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-- Started the Depends framework, wrote dep.pl to scan deps and
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produce "callgraph.txt" ;-)
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-- Wrote SC_RSA_1 which will enable close to the minimum required to perform
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RSA on 32-bit [or 64-bit] platforms with LibTomCrypt
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-- Merged in the small/slower mp_div replacement. You can now toggle which
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you want to use as your mp_div() at build time. Saves roughly 8KB or so.
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-- Renamed a few files and changed some comments to make depends system work better.
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(No changes to function names)
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-- Merged in new Combas that perform 2 reads per inner loop instead of the older
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3reads/2writes per inner loop of the old code. Really though if you want speed
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learn to use TomsFastMath ;-)
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August 9th, 2004
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v0.31 -- "profiled" builds now :-) new timings for Intel Northwoods
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-- Added "pretty" build target
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-- Update mp_init() to actually assign 0's instead of relying on calloc()
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-- "Wolfgang Ehrhardt" <Wolfgang.Ehrhardt@munich.netsurf.de> found a bug in mp_mul() where if
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you multiply a negative by zero you get negative zero as the result. Oops.
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-- J Harper from PeerSec let me toy with his AMD64 and I got 60-bit digits working properly
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[this also means that I fixed a bug where if sizeof(int) < sizeof(mp_digit) it would bug]
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April 11th, 2004
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v0.30 -- Added "mp_toradix_n" which stores upto "n-1" least significant digits of an mp_int
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-- Johan Lindh sent a patch so MSVC wouldn't whine about redefining malloc [in weird dll modes]
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-- Henrik Goldman spotted a missing OPT_CAST in mp_fwrite()
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-- Tuned tommath.h so that when MP_LOW_MEM is defined MP_PREC shall be reduced.
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[I also allow MP_PREC to be externally defined now]
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-- Sped up mp_cnt_lsb() by using a 4x4 table [e.g. 4x speedup]
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-- Added mp_prime_random_ex() which is a more versatile prime generator accurate to
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exact bit lengths (unlike the deprecated but still available mp_prime_random() which
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is only accurate to byte lengths). See the new LTM_PRIME_* flags ;-)
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-- Alex Polushin contributed an optimized mp_sqrt() as well as mp_get_int() and mp_is_square().
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I've cleaned them all up to be a little more consistent [along with one bug fix] for this release.
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-- Added mp_init_set and mp_init_set_int to initialize and set small constants with one function
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call.
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-- Removed /etclib directory [um LibTomPoly deprecates this].
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-- Fixed mp_mod() so the sign of the result agrees with the sign of the modulus.
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++ N.B. My semester is almost up so expect updates to the textbook to be posted to the libtomcrypt.org
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website.
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Jan 25th, 2004
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v0.29 ++ Note: "Henrik" from the v0.28 changelog refers to Henrik Goldman ;-)
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-- Added fix to mp_shrink to prevent a realloc when used == 0 [e.g. realloc zero bytes???]
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-- Made the mp_prime_rabin_miller_trials() function internal table smaller and also
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set the minimum number of tests to two (sounds a bit safer).
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-- Added a mp_exteuclid() which computes the extended euclidean algorithm.
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-- Fixed a memory leak in s_mp_exptmod() [called when Barrett reduction is to be used] which would arise
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if a multiplication or subsequent reduction failed [would not free the temp result].
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-- Made an API change to mp_radix_size(). It now returns an error code and stores the required size
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through an "int star" passed to it.
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Dec 24th, 2003
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v0.28 -- Henrik Goldman suggested I add casts to the montomgery code [stores into mu...] so compilers wouldn't
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spew [erroneous] diagnostics... fixed.
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-- Henrik Goldman also spotted two typos. One in mp_radix_size() and another in mp_toradix().
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-- Added fix to mp_shrink() to avoid a memory leak.
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-- Added mp_prime_random() which requires a callback to make truly random primes of a given nature
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(idea from chat with Niels Ferguson at Crypto'03)
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-- Picked up a second wind. I'm filled with Gooo. Mission Gooo!
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-- Removed divisions from mp_reduce_is_2k()
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-- Sped up mp_div_d() [general case] to use only one division per digit instead of two.
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-- Added the heap macros from LTC to LTM. Now you can easily [by editing four lines of tommath.h]
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change the name of the heap functions used in LTM [also compatible with LTC via MPI mode]
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-- Added bn_prime_rabin_miller_trials() which gives the number of Rabin-Miller trials to achieve
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a failure rate of less than 2^-96
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-- fixed bug in fast_mp_invmod(). The initial testing logic was wrong. An invalid input is not when
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"a" and "b" are even it's when "b" is even [the algo is for odd moduli only].
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-- Started a new manual [finally]. It is incomplete and will be finished as time goes on. I had to stop
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adding full demos around half way in chapter three so I could at least get a good portion of the
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manual done. If you really need help using the library you can always email me!
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-- My Textbook is now included as part of the package [all Public Domain]
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Sept 19th, 2003
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v0.27 -- Removed changes.txt~ which was made by accident since "kate" decided it was
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a good time to re-enable backups... [kde is fun!]
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-- In mp_grow() "a->dp" is not overwritten by realloc call [re: memory leak]
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Now if mp_grow() fails the mp_int is still valid and can be cleared via
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mp_clear() to reclaim the memory.
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-- Henrik Goldman found a buffer overflow bug in mp_add_d(). Fixed.
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-- Cleaned up mp_mul_d() to be much easier to read and follow.
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Aug 29th, 2003
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v0.26 -- Fixed typo that caused warning with GCC 3.2
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-- Martin Marcel noticed a bug in mp_neg() that allowed negative zeroes.
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Also, Martin is the fellow who noted the bugs in mp_gcd() of 0.24/0.25.
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-- Martin Marcel noticed an optimization [and slight bug] in mp_lcm().
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-- Added fix to mp_read_unsigned_bin to prevent a buffer overflow.
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-- Beefed up the comments in the baseline multipliers [and montgomery]
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-- Added "mont" demo to the makefile.msvc in etc/
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-- Optimized sign compares in mp_cmp from 4 to 2 cases.
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Aug 4th, 2003
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v0.25 -- Fix to mp_gcd again... oops (0,-a) == (-a, 0) == a
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-- Fix to mp_clear which didn't reset the sign [Greg Rose]
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-- Added mp_error_to_string() to convert return codes to strings. [Greg Rose]
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-- Optimized fast_mp_invmod() to do the test for invalid inputs [both even]
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first so temps don't have to be initialized if it's going to fail.
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-- Optimized mp_gcd() by removing mp_div_2d calls for when one of the inputs
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is odd.
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-- Tons of new comments, some indentation fixups, etc.
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-- mp_jacobi() returns MP_VAL if the modulus is less than or equal to zero.
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-- fixed two typos in the header of each file :-)
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-- LibTomMath is officially Public Domain [see LICENSE]
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July 15th, 2003
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v0.24 -- Optimized mp_add_d and mp_sub_d to not allocate temporary variables
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-- Fixed mp_gcd() so the gcd of 0,0 is 0. Allows the gcd operation to be chained
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e.g. (0,0,a) == a [instead of 1]
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-- Should be one of the last release for a while. Working on LibTomMath book now.
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-- optimized the pprime demo [/etc/pprime.c] to first make a huge table of single
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digit primes then it reads them randomly instead of randomly choosing/testing single
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digit primes.
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July 12th, 2003
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v0.23 -- Optimized mp_prime_next_prime() to not use mp_mod [via is_divisible()] in each
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iteration. Instead now a smaller table is kept of the residues which can be updated
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without division.
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-- Fixed a bug in next_prime() where an input of zero would be treated as odd and
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have two added to it [to move to the next odd].
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-- fixed a bug in prime_fermat() and prime_miller_rabin() which allowed the base
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to be negative, zero or one. Normally the test is only valid if the base is
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greater than one.
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-- changed the next_prime() prototype to accept a new parameter "bbs_style" which
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will find the next prime congruent to 3 mod 4. The default [bbs_style==0] will
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make primes which are either congruent to 1 or 3 mod 4.
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-- fixed mp_read_unsigned_bin() so that it doesn't include both code for
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the case DIGIT_BIT < 8 and >= 8
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-- optimized div_d() to easy out on division by 1 [or if a == 0] and use
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logical shifts if the divisor is a power of two.
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-- the default DIGIT_BIT type was not int for non-default builds. Fixed.
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July 2nd, 2003
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v0.22 -- Fixed up mp_invmod so the result is properly in range now [was always congruent to the inverse...]
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-- Fixed up s_mp_exptmod and mp_exptmod_fast so the lower half of the pre-computed table isn't allocated
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which makes the algorithm use half as much ram.
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-- Fixed the install script not to make the book :-) [which isn't included anyways]
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-- added mp_cnt_lsb() which counts how many of the lsbs are zero
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-- optimized mp_gcd() to use the new mp_cnt_lsb() to replace multiple divisions by two by a single division.
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-- applied similar optimization to mp_prime_miller_rabin().
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-- Fixed a bug in both mp_invmod() and fast_mp_invmod() which tested for odd
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via "mp_iseven() == 0" which is not valid [since zero is not even either].
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June 19th, 2003
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v0.21 -- Fixed bug in mp_mul_d which would not handle sign correctly [would not always forward it]
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-- Removed the #line lines from gen.pl [was in violation of ISO C]
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June 8th, 2003
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v0.20 -- Removed the book from the package. Added the TDCAL license document.
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-- This release is officially pure-bred TDCAL again [last officially TDCAL based release was v0.16]
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June 6th, 2003
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v0.19 -- Fixed a bug in mp_montgomery_reduce() which was introduced when I tweaked mp_rshd() in the previous release.
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Essentially the digits were not trimmed before the compare which cause a subtraction to occur all the time.
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-- Fixed up etc/tune.c a bit to stop testing new cutoffs after 16 failures [to find more optimal points].
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Brute force ho!
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May 29th, 2003
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v0.18 -- Fixed a bug in s_mp_sqr which would handle carries properly just not very elegantly.
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(e.g. correct result, just bad looking code)
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-- Fixed bug in mp_sqr which still had a 512 constant instead of MP_WARRAY
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-- Added Toom-Cook multipliers [needs tuning!]
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-- Added efficient divide by 3 algorithm mp_div_3
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-- Re-wrote mp_div_d to be faster than calling mp_div
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-- Added in a donated BCC makefile and a single page LTM poster (ahalhabsi@sbcglobal.net)
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-- Added mp_reduce_2k which reduces an input modulo n = 2**p - k for any single digit k
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-- Made the exptmod system be aware of the 2k reduction algorithms.
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-- Rewrote mp_dr_reduce to be smaller, simpler and easier to understand.
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May 17th, 2003
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v0.17 -- Benjamin Goldberg submitted optimized mp_add and mp_sub routines. A new gen.pl as well
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as several smaller suggestions. Thanks!
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-- removed call to mp_cmp in inner loop of mp_div and put mp_cmp_mag in its place :-)
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-- Fixed bug in mp_exptmod that would cause it to fail for odd moduli when DIGIT_BIT != 28
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-- mp_exptmod now also returns errors if the modulus is negative and will handle negative exponents
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-- mp_prime_is_prime will now return true if the input is one of the primes in the prime table
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-- Damian M Gryski (dgryski@uwaterloo.ca) found a index out of bounds error in the
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mp_fast_s_mp_mul_high_digs function which didn't come up before. (fixed)
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-- Refactored the DR reduction code so there is only one function per file.
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-- Fixed bug in the mp_mul() which would erroneously avoid the faster multiplier [comba] when it was
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allowed. The bug would not cause the incorrect value to be produced just less efficient (fixed)
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-- Fixed similar bug in the Montgomery reduction code.
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-- Added tons of (mp_digit) casts so the 7/15/28/31 bit digit code will work flawlessly out of the box.
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Also added limited support for 64-bit machines with a 60-bit digit. Both thanks to Tom Wu (tom@arcot.com)
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-- Added new comments here and there, cleaned up some code [style stuff]
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-- Fixed a lingering typo in mp_exptmod* that would set bitcnt to zero then one. Very silly stuff :-)
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-- Fixed up mp_exptmod_fast so it would set "redux" to the comba Montgomery reduction if allowed. This
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saves quite a few calls and if statements.
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-- Added etc/mont.c a test of the Montgomery reduction [assuming all else works :-| ]
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-- Fixed up etc/tune.c to use a wider test range [more appropriate] also added a x86 based addition which
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uses RDTSC for high precision timing.
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-- Updated demo/demo.c to remove MPI stuff [won't work anyways], made the tests run for 2 seconds each so its
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not so insanely slow. Also made the output space delimited [and fixed up various errors]
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-- Added logs directory, logs/graph.dem which will use gnuplot to make a series of PNG files
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that go with the pre-made index.html. You have to build [via make timing] and run ltmtest first in the
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root of the package.
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-- Fixed a bug in mp_sub and mp_add where "-a - -a" or "-a + a" would produce -0 as the result [obviously invalid].
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-- Fixed a bug in mp_rshd. If the count == a.used it should zero/return [instead of shifting]
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-- Fixed a "off-by-one" bug in mp_mul2d. The initial size check on alloc would be off by one if the residue
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shifting caused a carry.
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-- Fixed a bug where s_mp_mul_digs() would not call the Comba based routine if allowed. This made Barrett reduction
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slower than it had to be.
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Mar 29th, 2003
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v0.16 -- Sped up mp_div by making normalization one shift call
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-- Sped up mp_mul_2d/mp_div_2d by aliasing pointers :-)
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-- Cleaned up mp_gcd to use the macros for odd/even detection
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-- Added comments here and there, mostly there but occasionally here too.
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Mar 22nd, 2003
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v0.15 -- Added series of prime testing routines to lib
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-- Fixed up etc/tune.c
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-- Added DR reduction algorithm
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-- Beefed up the manual more.
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-- Fixed up demo/demo.c so it doesn't have so many warnings and it does the full series of
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tests
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-- Added "pre-gen" directory which will hold a "gen.pl"'ed copy of the entire lib [done at
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zipup time so its always the latest]
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-- Added conditional casts for C++ users [boo!]
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Mar 15th, 2003
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v0.14 -- Tons of manual updates
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-- cleaned up the directory
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-- added MSVC makefiles
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-- source changes [that I don't recall]
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-- Fixed up the lshd/rshd code to use pointer aliasing
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-- Fixed up the mul_2d and div_2d to not call rshd/lshd unless needed
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-- Fixed up etc/tune.c a tad
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-- fixed up demo/demo.c to output comma-delimited results of timing
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also fixed up timing demo to use a finer granularity for various functions
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-- fixed up demo/demo.c testing to pause during testing so my Duron won't catch on fire
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[stays around 31-35C during testing :-)]
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Feb 13th, 2003
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v0.13 -- tons of minor speed-ups in low level add, sub, mul_2 and div_2 which propagate
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to other functions like mp_invmod, mp_div, etc...
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-- Sped up mp_exptmod_fast by using new code to find R mod m [e.g. B^n mod m]
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-- minor fixes
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Jan 17th, 2003
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v0.12 -- re-wrote the majority of the makefile so its more portable and will
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install via "make install" on most *nix platforms
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-- Re-packaged all the source as seperate files. Means the library a single
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file packagage any more. Instead of just adding "bn.c" you have to add
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libtommath.a
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-- Renamed "bn.h" to "tommath.h"
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-- Changes to the manual to reflect all of this
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-- Used GNU Indent to clean up the source
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Jan 15th, 2003
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v0.11 -- More subtle fixes
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-- Moved to gentoo linux [hurrah!] so made *nix specific fixes to the make process
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-- Sped up the montgomery reduction code quite a bit
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-- fixed up demo so when building timing for the x86 it assumes ELF format now
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Jan 9th, 2003
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v0.10 -- Pekka Riikonen suggested fixes to the radix conversion code.
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-- Added baseline montgomery and comba montgomery reductions, sped up exptmods
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[to a point, see bn.h for MONTGOMERY_EXPT_CUTOFF]
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Jan 6th, 2003
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v0.09 -- Updated the manual to reflect recent changes. :-)
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-- Added Jacobi function (mp_jacobi) to supplement the number theory side of the lib
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-- Added a Mersenne prime finder demo in ./etc/mersenne.c
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Jan 2nd, 2003
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v0.08 -- Sped up the multipliers by moving the inner loop variables into a smaller scope
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-- Corrected a bunch of small "warnings"
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-- Added more comments
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-- Made "mtest" be able to use /dev/random, /dev/urandom or stdin for RNG data
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-- Corrected some bugs where error messages were potentially ignored
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-- add etc/pprime.c program which makes numbers which are provably prime.
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Jan 1st, 2003
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v0.07 -- Removed alot of heap operations from core functions to speed them up
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-- Added a root finding function [and mp_sqrt macro like from MPI]
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-- Added more to manual
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Dec 31st, 2002
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v0.06 -- Sped up the s_mp_add, s_mp_sub which inturn sped up mp_invmod, mp_exptmod, etc...
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-- Cleaned up the header a bit more
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Dec 30th, 2002
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v0.05 -- Builds with MSVC out of the box
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|
-- Fixed a bug in mp_invmod w.r.t. even moduli
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|
-- Made mp_toradix and mp_read_radix use char instead of unsigned char arrays
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|
-- Fixed up exptmod to use fewer multiplications
|
|
-- Fixed up mp_init_size to use only one heap operation
|
|
-- Note there is a slight "off-by-one" bug in the library somewhere
|
|
without the padding (see the source for comment) the library
|
|
crashes in libtomcrypt. Anyways a reasonable workaround is to pad the
|
|
numbers which will always correct it since as the numbers grow the padding
|
|
will still be beyond the end of the number
|
|
-- Added more to the manual
|
|
|
|
Dec 29th, 2002
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|
v0.04 -- Fixed a memory leak in mp_to_unsigned_bin
|
|
-- optimized invmod code
|
|
-- Fixed bug in mp_div
|
|
-- use exchange instead of copy for results
|
|
-- added a bit more to the manual
|
|
|
|
Dec 27th, 2002
|
|
v0.03 -- Sped up s_mp_mul_high_digs by not computing the carries of the lower digits
|
|
-- Fixed a bug where mp_set_int wouldn't zero the value first and set the used member.
|
|
-- fixed a bug in s_mp_mul_high_digs where the limit placed on the result digits was not calculated properly
|
|
-- fixed bugs in add/sub/mul/sqr_mod functions where if the modulus and dest were the same it wouldn't work
|
|
-- fixed a bug in mp_mod and mp_mod_d concerning negative inputs
|
|
-- mp_mul_d didn't preserve sign
|
|
-- Many many many many fixes
|
|
-- Works in LibTomCrypt now :-)
|
|
-- Added iterations to the timing demos... more accurate.
|
|
-- Tom needs a job.
|
|
|
|
Dec 26th, 2002
|
|
v0.02 -- Fixed a few "slips" in the manual. This is "LibTomMath" afterall :-)
|
|
-- Added mp_cmp_mag, mp_neg, mp_abs and mp_radix_size that were missing.
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|
-- Sped up the fast [comba] multipliers more [yahoo!]
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|
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|
Dec 25th,2002
|
|
v0.01 -- Initial release. Gimme a break.
|
|
-- Todo list,
|
|
add details to manual [e.g. algorithms]
|
|
more comments in code
|
|
example programs
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