Revision history for Perl extension Digest::SHA.

6.02  Fri Apr 20 16:25:30 MST 2018

	- silenced compiler warnings from VS2017

		-- ref. rt.cpan.org #124477

		-- thanks to Sergey Aleynikov for diagnostics

	- modified addfile to return error when given a directory name

		-- makes behavior consistent with GNU coreutils shaXsum

		-- thanks to Scott Baker for pointing this out

6.01  Mon Dec 25 00:08:08 MST 2017

	- added "--ignore-missing" and "--strict" options to shasum

		-- consistent with GNU coreutils

		-- ref. rt.cpan.org #123897

	- removed PERL_CORE preambles from test scripts

		-- preambles no longer needed for core testing

		-- thanks to Chris Williams for patch

		-- ref. rt.cpan.org #123863

6.00  Fri Dec  8 22:44:44 MST 2017

	- added "tag" option (BSD-style checksums) to shasum

		-- consistent with GNU sha1sum, sha224sum, etc.

		-- thanks to Christopher Tubbs for suggestion

	- modified SHA.pm to use XSLoader

		-- falls back to DynaLoader if necessary

	- decoupled Digest::SHA and Digest::SHA::PurePerl

		-- scripts/tests in each module now fully independent

		-- Digest::SHA::PurePerl to be phased out eventually

			-- past versions will remain available

5.98  Wed Oct  4 00:40:02 MST 2017

	- removed "portable" mode from shasum and addfile

		-- rarely used, mostly in outdated systems

		-- potentially confusing features (e.g. \r\r\n -> \n)

		-- Universal Newlines mode (-U) a much cleaner approach

			-- mimics Universal Newlines in Python

	- shasum now uses Digest::SHA explicitly

		-- no longer loads Digest::SHA::PurePerl as an option

			-- hence no need for -R switch

		-- Digest::SHA::PurePerl has its own shasum: shasumpp

5.97  Wed Sep  6 02:23:02 MST 2017

	- added 'quiet' option to shasum

		-- thanks to Chris David for suggestion and initial patch

		-- ref. rt.cpan.org #122750

	- expanded shasum --help message

		-- to explain use of escaped FILE names

5.96  Wed Jul 27 20:04:34 MST 2016

	- prevented shasum from possibly running malicious code

		-- remove '.' from @INC before module loading

		-- ref. rt.cpan.org #116513

	- namespace cleanup (ref. rt.cpan.org #105371 and #105372)

	- minor code and documentation tweaks

5.95  Sat Jan 10 12:15:36 MST 2015

	- modified the bit-ordering test (ref. t/bitorder.t)

		-- supplied directory-change preamble for CORE builds

5.94  Sat Jan 10 00:45:28 MST 2015

	- added support for threaded builds 

		-- PERL_GET_NO_CONTEXT, pTHX_, aTHX_, etc.

		-- employed 'const' storage class where possible

		-- ref. rt.cpan.org #101260

	- simplified shabits() routine (bitwise input buffering)

		-- slightly less efficient but easier to understand

		-- ref. rt.cpan.org #101344

	- minor documentation tweaks and additions

5.93  Sun Oct 26 06:00:48 MST 2014

	- corrected alignment problem in SHA struct (src/sha.h)

		-- thanks to H. Merijn Brand and J. Hietaniemi for 

			analysis and suggested patch

	- provided workaround in t/methods.t for unreliable -T test

		-- Some Perl 5.8's mistake text for binary

5.92  Sun Jun  1 00:15:44 MST 2014

	- fixed reserved-word clash when compiling with C++

		-- use 'classname' instead of 'class'

			-- ref. SHA.xs (rt.cpan.org #96090)

	- silenced MSC compiler warning about signed/unsigned comparison

		-- ref. SHA.xs (rt.cpan.org #95830)

5.91  Fri May 16 10:21:44 MST 2014

	- restored original 'addfile' for use on opened file handles

		-- allows callbacks in place of actual files

			-- ref. IO::Callback (rt.cpan.org #95643)

	- re-established inheritance from Digest::base

		-- to pick up future Digest enhancements automatically

	- cleaned up documentation

5.90  Wed May  7 07:57:08 MST 2014

	- consolidated all dynamic memory allocation into XSUBs

		-- streamlines referencing of SHA objects

		-- simplifies DESTROYing of objects

	- enhanced Makefile.PL to allow 'use warnings'

		-- automatically reverts to $^W for early Perls

	- scrubbed C and Perl code to remove all compiler warnings

5.89  Sat Apr 19 05:14:48 MST 2014

	- added universal newlines mode ("U") to addfile and shasum

		-- based on Python Universal Newlines concept

			-- newlines identical across MacOS, DOS, and UNIX

		-- will deprecate portable mode ("p") in future

			-- "U" mode is cleaner and more efficient

	- enhanced performance

		-- reduced number of dynamic memory allocations

		-- sped up addfile method with use of C code

			-- ref. SHA.xs (_addfilebin and _addfileuniv)

	- eliminated experimental -M option in favor of new -R option

		-- reverses order of digest module preference

		-- undocumented: for test and development use only

	- sealed memory leak in SHA.xs

		-- arose only with SvPVbyte exceptions during eval

	- patched inheritence bug (ref: rt.cpan.org #94830)

		-- use sv_isobject/sv_derived_from instead of sv_isa

	- added 'allocated' flag to SHA structure (ref. src/sha.h)

		-- to guard against Perl double frees

5.88  Mon Mar 17 08:46:10 MST 2014

	- added OUTPUT clause in SHA.xs to silence compiler warning

		-- ref. shaclose()

	- changed text file test (-T) to act on filehandles

		-- ref. addfile portable mode

		-- improves consistency when reading from STDIN

		-- still must act on filenames for early Perls (< 5.6)

	- added -M and -V options to shasum

		-- undocumented: for development and testing use only

5.87  Mon Feb 17 16:42:02 MST 2014

	- simplified capture of intermediate SHA states

		-- can now be done via strings (ref. getstate/putstate)

		-- substantially reduces size of src/sha.c

	- tightened code in SHA.xs

		-- added sv_isa checks when invoking methods

5.86  Thu Jan 30 08:24:28 MST 2014

	- improved the performance of hexadecimal output functions

		-- ref. 'shahex' in src/sha.c

		-- thanks to Thomas Drugeon for ideas and test script

5.85  Wed Jun 26 04:05:26 MST 2013

	- workaround for repeated calls to shaclose (ref. Bug #86295)

		-- need to explicitly reset internal pointer to NULL

			ref. shaclose() in SHA.xs

	- corrected typos in shasum script

		-- ref. Bug #85430

5.84  Sat Mar  9 17:36:08 MST 2013

	- untweaked Makefile.PL to remove dependencies of SHA.c

		-- dependencies were breaking builds on VMS

		-- retaining dependencies provides too little benefit

			for cost of portable workaround

5.83  Mon Mar  4 08:12:00 MST 2013

	- removed code for standalone C operation (no longer used)

		-- eliminates need for external symbols

		-- consolidates SHA and HMAC code

		-- reduces size of object files

		-- thanks to Marc Lehmann for suggestions

	- tweaked Makefile.PL to show dependencies of SHA.c

5.82  Thu Jan 24 04:54:12 MST 2013

	- introduced workaround to SvPVbyte bug in Perl 5.6

		-- module behavior now consistent under all Perls 5.6+

			-- ref: new test script t/unicode.t

		-- SHA routines now always croak on wide chars (5.6+)

	- removed "static" message schedules from C code

		-- default "auto" is now just as fast

		-- thread-safe option (-t) no longer necessary

			-- still allowed, but ignored

		-- simplifies source and header files

			-- eliminates SHA_STO_CLASS and SHA_THREAD_SAFE

			-- ref. Bug #82784

		-- thanks to Steve Hay for initial patch

	- provided documentation to describe Unicode handling

		-- ref: Bug #82378

	- updated documentation of NIST statement on SHA-1

5.81  Mon Jan 14 05:17:08 MST 2013

	- corrected load subroutine (SHA.pm) to prevent double-free

		-- Bug #82655: Security issue - segfault

		-- thanks to Victor Efimov and Nicholas Clark

			for technical expertise and suggestions

5.80  Mon Dec 10 14:15:26 MST 2012

	- obtained noticeable speedup on Intel/gcc

		-- by setting -O1 and -fomit-frame-pointer

		-- SHA-1 about 63% faster, SHA-2 improves 11-20%

5.74  Sat Nov 24 03:10:18 MST 2012

	- handle wide-string input by converting to bytes first

		-- viz. use SvPVbyte instead of SvPV in SHA.xs

		-- thanks to Eric Brine for summary and code

5.73  Wed Oct 31 04:32:44 MST 2012

	- provided workaround for DEC compiler bug (ref. Makefile.PL)

5.72  Mon Sep 24 15:22:08 MST 2012

	- adjusted module installation directory for later Perls

		-- As of 5.11 Perl searches 'site' first, so use that

			-- ref. INSTALLDIRS in Makefile.PL

		-- thanks to Robert Sedlacek for patch

5.71  Wed Feb 29 04:06:10 MST 2012

	- prevented $! from getting clobbered in _bail() routine

		-- thanks to Zefram for patch

	- added example of BITS mode usage to shasum documentation

5.70  Wed Dec 14 02:32:10 MST 2011

	- added BITS mode to addfile method and shasum

		-- partial-byte inputs now possible via files/STDIN

		-- allows shasum to check all 8074 NIST Msg vectors

			-- previously required special programming

5.63  Tue Nov  8 02:36:42 MST 2011

	- added code to allow very large data inputs all at once

		-- previously limited to several hundred MB at a time

		-- many thanks to Thomas Drugeon for his elegant patch

	- removed outdated reference URLs from several test scripts

		-- these URLs aren't essential, and often go stale

		-- thanks to Leon Brocard for spotting this

			-- ref. rt.cpan.org #68740

5.62  Sat May 14 04:00:34 MST 2011

	- removed unnecessary loading of MIME::Base64 module

		-- thanks to dolmen for pointing this out

5.61  Wed Mar  9 05:26:36 MST 2011

	- corrected bug in 'algorithm' method

	- fixed -x option in Makefile.PL

		-- not often used since it deliberately excludes

			all 64-bit SHA transforms

	- addressed minor documentation oversights

5.60  Thu Mar  3 05:26:42 MST 2011

	- added new SHA-512/224 and SHA-512/256 transforms

		-- ref. NIST Draft FIPS 180-4 (February 2011)

	- simplified shasum by removing duplicative text

	- improved efficiency of Addfile

		-- expensive -T test now occurs only in portable mode

5.50  Tue Dec 14 06:20:08 MST 2010

	- adopted convention that '-' always means STDIN

		-- actual filename '-' accessed as './-'

		-- accords with behavior of sha1sum/md5sum

	- corrected undefined subroutine oversight in shasum

		-- inadvertent migration of _bail() from SHA.pm

5.49  Sun Dec 12 07:22:04 MST 2010

	- modified Addfile to accept all POSIX filenames

		-- standard allows all characters except NUL and '/'

	- updated shasum to more closely mimic sha1sum/md5sum

		-- added "backslash processing" to handle newlines

			and backslashes in filenames

		-- now accepts all POSIX filenames via Addfile

		-- thanks to Sean Burke for identifying edge cases

5.48  Mon Jan  4 16:32:52 MST 2010

	- fixed "shasum -a0" option (ref. rt.cpan.org #53319)

		-- incorrectly accepted 0 as a valid algorithm

			-- thanks to Zefram for patch

	- updated URL for NIST test vectors

		-- ref. files t/nistbit.t, t/nistbyte.t

			-- thanks to Leon Brocard for patch

5.47  Wed Apr 30 04:00:54 MST 2008

	- modified Makefile.PL to install in core for Perls >= 5.10

		-- thanks to Jerry Hedden for patch

	- changed from #include <> to #include "" in SHA.xs

		-- some platforms not able to find SHA source files

			-- thanks to Alexandr Ciornii for testing

	- moved .pm file to appropriate lib directory

	- minor addition to META.yml

5.46  Wed Apr  9 05:04:00 MST 2008

	- modified Addfile to recognize leading and trailing

		whitespace in filenames (ref. rt.cpan.org #34690)

	- minor C source code modification (ref. hmac.c)

	- use const in sha.c for clean builds with -Wwrite-strings

		-- thanks to Robin Barker for patch

5.45  Tue Jun 26 02:36:00 MST 2007

	- extended portability to earlier Perls

		-- works on Perl 5.003 and later

		-- thanks to Jim Doble for testing on legacy platforms

	- updated META.yml to conform to current META spec (1.3)

	- minor documentation fixes

5.44  Sat Oct 14 00:42:44 MST 2006

	- removed SIGNATURE file from distribution

		-- spurious errors from CPANPLUS can break build

	- eliminated ppport.h header file

		-- significantly reduces size of distribution

	- modified C functions in src/hmac.c to use ANSI prototypes

		-- thanks to Jarkko Hietaniemi for patch

5.43  Sat Aug  5 02:36:18 MST 2006

	- undid Perl Best Practice of favoring 3-argument "open"

		-- 3-arg version uses different semantics for "-"

			causing bugs in addfile and shasum

	- modified underlying C functions to use ANSI prototypes

		-- requested by Steve Hay (ref. Smoke [5.9.4] 28630)

		-- K&R style was causing numerous warnings from

			Borland compiler

5.42  Mon Jul 24 04:04:40 MST 2006

	- minor code changes suggested by Perl::Critic

		-- e.g. no bareword filehandles, no 2-argument open's

	- updated public key (ref. B538C51C)

		-- previous one (0AF563FE) expired July 2, 2006

	- added documentation to warn that Base64 digests are NOT padded

		-- padding must be done by user if interoperability

			with other software is required

5.41  Sat Jun  3 01:50:46 MST 2006

	- corrected addfile

		-- process $file argument as a filehandle unless passed

			as a SCALAR (which indicates a file name)

5.40  Fri Jun  2 04:00:30 MST 2006

	- modified addfile to accept indirect filehandles

		-- ref. rt.cpan.org #19627 and #19641

5.39  Sun May 28 03:22:24 MST 2006

	- modified shasum to warn rather than die for file errors

		-- to follow conventions of GNU sha1sum/md5sum

5.38  Thu May 25 02:02:02 MST 2006

	- added new capabilities to the "addfile" method

		-- now able to accept file names as well as handles

		-- includes mode for portable digest calculation

			-- thanks to Adam Kennedy for emails and ideas

				ref. File::LocalizeNewlines

	- used expanded addfile interface to simplify shasum (sumfile)

		-- regex a tad less general than 5.37, but handles all

			known newline variants in UNIX/Windows/MacOS

	- enhanced WARNING messages from shasum checkfile processing

		-- to mimic behavior of md5sum

5.37  Mon May  8 04:30:09 MST 2006

	- modified shasum to avoid file slurping (ref. sub sumfile)

	- improved error handling of checksum files in shasum

		-- to better mimic the behavior of md5sum

	- refined line-break regex in shasum (ref. sub sumfile)

		-- catches multiple CR's preceding LF

			thanks to Gisle Aas for suggested patch

	- changed loop vars to signed int's in shadump (ref. src/sha.c)

		-- to prevent type mismatch warnings

5.36  Mon May  8 01:38:36 MST 2006

	- fixed the "portable" option in shasum

		-- normalize line-breaks in text files only

5.35  Thu May  4 16:54:42 MST 2006

	- added "portable" option to shasum

		-- to make digests match across Windows/Unix/MacOS

	- enabled bundling of shasum command line options

		-- to mimic behavior of md5sum

	- removed \r's from text files in t/nist directory

		-- resolves SIGNATURE clashes (rt.cpan.org #18983)

	- changed suffix on SHA64_MAX (src/sha.h) to ULL

		-- eliminates gcc warnings (rt.cpan.org #18988)

	- specified minimum Perl version for module and Makefile.PL

		-- closes rt.cpan.org #18984

5.34  Thu Feb  2 18:55:40 MST 2006

	- removed Unix-style pathnames in test scripts

		-- causing problems on OpenVMS

		-- thanks to Steve Peters for patch

	- included latest version of Perl Portability header (ppport.h)

	- added PERL_CORE check to test scripts

		-- allows module to be built into Perl distribution

5.32  Fri Dec  2 02:32:20 MST 2005

	- added POD section to shasum script

		-- thanks to Gunnar Wolf for patch

	- made minor code changes to silence compiler warnings

		-- resulting from signed/unsigned integer mixing

	- inserted code in test scripts for POD checking

		-- to recover gracefully if Test::More isn't installed

5.31  Mon Sep  5 00:52:42 MST 2005

	- added standard tests for pod and pod-coverage checking

	- inserted subtest to check for failure when using

		unrecognized SHA algorithm

5.30  Sat Aug 20 16:46:08 MST 2005

	- updated docs with recent NIST statement on SHA-1

		-- advises use of larger and stronger hash functions

			(i.e. SHA-224/256/384/512) for new developments

5.29  Sun Aug 14 04:48:34 MST 2005

	- added explicit casts in "shaload" routine (ref. "ldvals")

		-- thanks to E. Allen Smith for pointing out SGI compiler

			warnings on IPxx-irix platforms

	- updated docs with cautionary note about SHA-1

5.28  Wed Nov 10 15:33:20 MST 2004

	- provided more flexible formatting of SHA state files

		-- entries may now contain embedded whitespace

			for improved readability

	- minor code cleanups

5.27  Sun Oct 24 02:54:00 MST 2004

	- minor code cleanups

		-- reduces size of dump files for SHA-1/224/256

5.26  Thu Oct  7 14:52:00 MST 2004

	- streamlined distribution

		-- reduced NIST vector tests from 200 to 20

			-- former number was overkill

			-- distro now downloads and builds more quickly

	- rewrote SYNOPSIS sections in pod file

	- made additional tweaks to t/8-shasum.t for portability

	- cleaned up test scripts

5.25  Sun Sep 12 18:48:00 MST 2004

	- removed non-essential test script

		-- t/8-shasum.t causes problems on sparc64-linux

	- reverted to using eval "require $module" in shasum

5.24  Sun Sep 12 02:50:18 MST 2004

	- modified shasum to use barewords in "require" statements

		-- ref. perl.cpan.testers (157305)

5.23  Thu Sep  9 23:06:18 MST 2004

	- corrected bug in test script

		-- use blib when invoking perl as an external

			command in t/8-shasum.t

5.22  Tue Sep  7 19:12:40 MST 2004

	- broadened SHA-384/512 support

		-- to compilers with no ULLONG_MAX in limits.h

			-- e.g IBM C (xlC 6.0.0) on AIX 4.3.3

			-- thanks to Chris Carey for suggestions

				and technical expertise

	- improved use of static storage class in transforms

		-- detection of Intel arch. now done in Makefile.PL

		-- NB: static not used if compiling for thread safety

	- minor changes to documentation

5.21  Mon Aug 23 04:02:00 MST 2004

	- removed 64-bit constant expressions from #if statements

		-- ref. src/sha.h (lines 55, 58, and 61)

		-- even if compiler supports long long's, preprocessor

			may use long's when evaluating expressions

	- improved test script for "shasum" (t/8-shasum.t)

		-- exercises check file option (-c)

5.20  Sun Aug 15 04:24:48 MST 2004

	- introduced "shasum" script

		-- mimics the usage and behavior of "md5sum"

		-- adds "-a" option to select SHA algorithm

		-- for help, just type "shasum -h"

5.10  Fri Aug  6 02:04:38 MST 2004

	- simplified module documentation

		-- made it consistent with Digest::SHA::PurePerl docs

5.03  Sat Jul 31 00:00:48 MST 2004

	- corrected HMAC-SHA-384/512 bug (cpan #7181, Adam Woodbury)

		-- code was using hardwired blocksize for SHA-1/256

			-- ref. src/hmac.c, src/hmac.h

5.02  Thu Jul 29 02:48:00 MST 2004

	- updated documentation and "dump-load.t" test script

		-- to be consistent with Digest::SHA::PurePerl

	- included a SIGNATURE file

		-- for stronger authentication of module contents

			-- ref. Module::Signature on CPAN

	- corrected embarrassing misspelling in docs

		-- apologies to Gisle Aas

5.01  Fri May 21 13:08:12 MST 2004

	- check for undefined SHA handle when calling "shaclose()"

		-- prevents intermittent cleanup errors during

			global object destruction

5.00  Fri May 14 04:45:00 MST 2004

	- minor documentation fixes

	- restored classical style of version numbering (X.YZ)

		-- previous X.Y.Z style caused installation difficulties

			when using CPANPLUS

4.3.3 Wed May  5 00:30:40 MST 2004

	- fixed bug in "strto64()" function

		-- caused problems in state files with CR/LF pairs

		-- thanks to Martin Thurn for testing support

4.3.2 Wed Apr 28 03:56:00 MST 2004

	- added Makefile.PL options

		-- thread-safety: -t

		-- exclude 384/512 support: -x

		-- e.g. perl Makefile.PL -t

	- temporarily suppress dump/load tests for SHA-384/512

		-- pending clarification of problem on sun4u sparc

4.3.1 Thu Mar  4 02:54:00 MST 2004

	- removed unused functions from XS file

		-- reduces size of compiled objects

	- simplified implementation of Digest::SHA object

		-- now a blessed SHAPtr ref instead of blessed array ref

		-- results in slight speed-up of OO operations

	- streamlined underlying C source

		-- used macros to consolidate repetitive code

	- rewrote test scripts to depend on Test rather than Test::More

		-- allows module to be checked in minimal Perl environments

	- added compilation option for thread-safety

		-- overrides use of static arrays

4.3.0 Sat Feb  7 02:58:00 MST 2004

	- included SHA-384/512 support if using Microsoft C/C++

		-- uses MSVC's __int64 in place of "long long"

	- enhanced portability and efficiency on diverse platforms

		-- automatically sets up optimal types for 32/64-bit ops

	- improved test scripts for better reporting

		-- many thanks to Alex Muntada for helpful suggestions

4.2.2 Sat Jan 31 17:10:20 MST 2004

	- repaired 32-bit SHA operations for 8-byte longs

4.2.1 Sat Jan 24 00:56:54 MST 2004

	- modified I/O and memory management in underlying C code

		-- uses Perl libraries when compiled as CPAN module

			-- otherwise defaults to ANSI C libraries

		-- bypasses problems in MSWin multi-threaded Perls

			-- avoids "Free to wrong pool" error

		-- special thanks to Robert Gilmour and Brian Gladman

			for technical guidance and testing

4.2.0 Sat Dec 27 16:08:00 MST 2003

	- added support for recently-announced SHA-224 algorithm

		-- ref. FIPS 180-2 Change Notice 1

		-- also includes HMAC-SHA-224

4.1.0 Thu Dec 25 00:58:00 MST 2003

	- repaired "nist-vectors" test scripts for MSWin32 portability

		-- use binmode for data files

4.0.9 Wed Dec 24 02:58:22 MST 2003

	- use canonical file specs in test scripts

		-- enhances portability across different OSes

	- modify type declarations of objects in XS file

		-- re-declare as (SV *) and cast to (AV *) SvRV(self)

			-- in response to AVPtr problem on MSWin32

4.0.8 Thu Dec 18 23:32:00 MST 2003

	- inherits from Digest::base if installed

		-- also checks for MIME::Base64

		-- still fully-functional if neither are installed

	- added buffer overflow protection in underlying C code

		-- ref. shahex() and shabase64() routines

		-- prior code appeared impossible to exploit, but ...

			-- better safe than sorry

		-- does not impact runtime efficiency

	- minor code cleanup

4.0.7 Sat Dec 13 00:48:24 MST 2003

	- check for undefined SHA handle when calling "shaclose()"

		-- was causing cleanup err during global destruction

4.0.6 Thu Dec 11 02:18:00 MST 2003

	- more optimization and streamlining

		-- a bit faster on non-big-endians (e.g. Intel)

	- rewrote time-critical functions and methods in XS

	- removed unused C functions from source files

4.0.5 Sat Dec  6 00:02:24 MST 2003

	- performance optimizations

		-- rewrote "add" method in XS

		-- unrolled loops in sha256 transform

4.0.4 Thu Dec  4 00:07:00 MST 2003

	- made Digest::SHA into a self-contained module

		-- no longer depends on Digest::base

		-- more convenient for users

			-- no need to install Digest:: module

4.0.3 Wed Dec  3 00:01:20 MST 2003

	- Digest::SHA now a subclass of Digest::base

		-- inherits hexdigest/b64digest/addfile methods

	- added "hashsize" method

	- removed old "shaopen()/shawrite()/..." legacy code

		-- in favor of standard, streamlined OO interface

	- renamed test vector files from NIST

		-- prevents problems on 8+3 filesystems

	- added test for Dave Ireland's SHA-256 vector

4.0.0 Sat Nov 29 21:14:09 MST 2003

	- major streamlining of interface (hence, major version change)

		-- coordinated with Gisle Aas and J. Duque

			-- goal is to produce a single SHA module

		-- adheres to OO and functional styles of Digest::

		-- greatly reduces the number of interface functions

		-- old functions still supported

			-- use Digest::SHA ':legacy'

			-- will be deprecated in near future

	- rewrote all test scripts to match new interface

		-- very easy to modify all 281 tests

		-- old interface maps cleanly to new one

3.0   Wed Nov 26 05:02:34 MST 2003

	- added functions that conform to Digest:: interface

		-- both functional and OO styles

			-- byte-oriented data only

		-- continue to support original interface as well

			-- necessary for bit-oriented data

	- supplied formal test vectors for HMAC-SHA-256

		-- from draft-ietf-ipsec-ciph-sha-256-01.txt

	- included tests for all OO methods

2.4   Sat Nov 22 17:10:22 MST 2003

	- code cleanup

		-- "sha.c" now completely free of #ifdef's

	- modularized all 64-bit (long long) code

	- improved readability of header files

	- simplified logic of "fixdump" utility

2.3   Wed Nov 19 03:54:31 MST 2003

	- minor optimizations and code cleanup

		-- improved maintainability by reducing #ifdef's

		-- sha1 transform code now easier to follow

	- streamlined shadump/shaload file format

		-- eliminated special "HQ" entry

		-- state now held in "H" for all transforms

		-- supplied "fixdump" utility to convert old format

	- SHA-384/512 functions now return NULL for no 64-bit operations

		-- previously they were undefined

		-- no longer necessary to use eval's to test for presence

2.2   Sun Nov 16 01:54:00 MST 2003

	- optimized the performance of the SHA-1 transform

		-- around 20-30% faster than previous version

		-- achieved by loop unrolling and assignment consolidation

	- enhanced shaload/shadump to allow interaction with stdin/stdout

		-- "$filename" argument now optional

2.1   Sun Nov  9 03:28:04 MST 2003

	- simplified data input routines

		-- length argument now optional for byte data

			(special thanks to Jeffrey Friedl for this idea)

		-- interface still compatible with earlier versions

			-- changes will not affect existing client code

	- streamlined underlying C code for easier maintenance

	- provided additional tests for persistent data

2.0   Sat Nov  1 03:55:36 MST 2003

	- added functions for HMAC-SHA-1/256/384/512 (FIPS PUB 198)

	- shadump/shaload files now compatible between 32/64-bit machines

1.01  Sat Oct 25 02:44:55 MST 2003

	- package now downloads and installs much faster

	- reduced distribution size by 80%

		-- pruned extensive NIST vectors to a useful subset

		-- still possible to test all vectors if desired

			--- see "t/nist/COPYRIGHT" file for details

	- added routines to provide persistent storage of SHA states

		-- shadump() and shaload()

	- reduced runtime of large bitstring tests (gillogly-hard)

		-- illustrates usefulness of shadump()/shaload()

1.0   Sat Oct 18 17:35:07 MST 2003

	- documentation fixes

	- code cleanup: no more compiler warnings from gcc -Wall

	- added code to allow reading of intermediate digest state

		-- shahex() prior to shafinish() returns current state

0.9   Thu Oct  9 20:43:54 MST 2003

	- version updated to reflect portability check and passing

		of all tests (1401)

0.01  Wed Oct  8 22:28:05 2003

	- original version; created by h2xs 1.22 with options

		-x -A -n Digest::SHA sha.h