Changelog for cpsa-2.2.10

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2012-06-28 John D. Ramsdell ramsdell@mitre.org

* cpsa.cabal (Version):  Tagged as version 2.2.10.

* src/CPSA/Lib/Entry.hs (tryIO): Made error option in return value
a string so that error messages are correctly parsed Emacs.

2012-06-06 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Entry.hs (tryIO): The use of System.IO.Error.try
has been deprecated, so CPSA.LIB.Entry now exports a replacement.

2012-06-06 John D. Ramsdell ramsdell@mitre.org

* {doc,tst}/Make.hs: Changed imports so that ExitCode and system
come from System.Exit and System.process, not System, which is
part of the haskell98 package that is now hidden by default.

2012-05-25 John D. Ramsdell ramsdell@mitre.org

* cpsa.cabal (Version):  Tagged as version 2.2.9.

* src/CPSA/Lib/Reduction.hs (begin, search): Collapsing is
performed as a pre-processing stage before any tests are solved.
As a result, there is no need for hulling, and it has been
disabled.

2012-05-24 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Strand.hs (augment): Removed the ability to turn
off displacement.

* src/CPSA/Lib/Strand.hs (augmentAndDisplace): Put skeletons
produced by displacement before the ones created by augmentation.

2012-05-23 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/*.hs:  Added penetrator non-origination
assumptions (pen-non-orig).

2012-05-22 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/SimpleDiffieHellman/Algebra.hs (normalize): Equality,
comparison, and substitution normalize exponentiated values.

2012-05-21 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/SimpleDiffieHellman/Algebra.hs (idSubst, substChase):
Produce canonical form for double exponents.

* src/CPSA/SimpleDiffieHellman/Algebra.hs (equalTerm)
(compareTerm): Compare double exponents using lists for efficiency
and readability.

2012-05-14 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/DiffieHellmanNoReciprocal/LinDiophEq.hs: Used the
method in the paper by Contejean and Devie for solving an
inhomogeneous equation using the algorithm for the homogeneous
equation solver.  The previous version buggy.

2012-05-04 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Graph/SVG.hs (kbutton): In a tree drawing, the label of
a shape is now blue.

2012-02-27 John D. Ramsdell ramsdell@mitre.org

* cpsa.cabal (Version):  Tagged as version 2.2.8.

2012-02-23 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Strand.hs (separateVariablesLimit): Added a hard
coded limit to the number of attempts to perform variable
separation during generalization.

2012-02-22 John D. Ramsdell ramsdell@mitre.org

* doc/cpsa.mk,doc/Make.hs: Removed rules for *.sch files.

2012-02-02 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Strand.hs (usePrunedStrandNotInPOV): Turned this
flag on.  It never was supposed to be off except for when
experimenting.

2012-02-01 John D. Ramsdell ramsdell@mitre.org

* cpsa.cabal (Version):  Tagged as version 2.2.7.

* doc/cpsasdha.tex: Added a document describing the current
implementation of a Diffie-Hellman algebra.

2012-01-25 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/*/Algebra.hs (encryptions): Used the C preprocessor to
all support for GHC 6.x while eliminating the annoying warnings
because Data.Map.foldWithKey has been deprecated in newer versions
of GHC.

* src/CPSA/Lib/Algebra.hs (encryptions): Changed the signature so
that an encryption returned by this function may have more than
one key used to prepare it as in the case of Diffie-Hellman
algebras.

2011-12-20 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Basic/Algebra.hs (match): Handle algebra equation with
the rule match(invk(t), t', env) -> match(t, invk(t'), env) when
t' is not of the form invk(t").  Corrects a missing case in
previous algorithm.

* src/CPSA/Lib/Notation.hs (mesg): Print (hash a b ... z)
as #(a, b, ..., z).

2011-12-09 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Graph/SVG.hs (tooltip): Display tool tips with
<g><title>TOOLTIP</title>...</g> instead of <a
xlink:title='MESSAGE'>...</a> so that tool tips work in Firefox
and Chrome again.

* cpsa.cabal (Version):  Tagged as version 2.2.6.

2011-11-18 John D. Ramsdell ramsdell@mitre.org

* tst/deorig_mesg.scm (deorig-mesg):  Added an example showing
that variables of sort mesg make deorigination very hard.

2011-11-07 John D. Ramsdell ramsdell@mitre.org

* doc/*: Delete cpsatheory.tex, and replace references to it with
ones to the MTR "Completeness of CPSA".

* src/CPSA/Lib/Loader.hs (notListenerPrefix): Ensure each role
does not have the pattern <-t, +t, ...> so as to avoid confusion
with listeners.q

2011-08-16 John D. Ramsdell ramsdell@mitre.org

* cpsa.cabal (Version):  Tagged as version 2.2.5.

2011-08-15 John D. Ramsdell ramsdell@mitre.org

* src/cpsa.pl: Changed the internal form so that compound terms
are represented as function symbols applied to terms, not as
S-expressions.

2011-08-12 John D. Ramsdell ramsdell@mitre.org

* doc/*: Updated documentation to reflect support for hashing.

2011-08-11 Paul Rowe prowe@mitre.org

* src/CPSA/Basic/Algebra.hs: Added support for hashing.

2011-07-26 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Strand.hs (ksubst): Made the flag validate the
first argument.

* src/CPSA/Lib/Strand.hs (compress): Added a flag validate.  When
false, compression does not check for intrastrand orderings that
create cycles.  Used in thinning.

2011-05-18 John D. Ramsdell ramsdell@mitre.org

* cpsa.cabal (Version):  Tagged as version 2.2.4.

2011-05-16 John D. Ramsdell ramsdell@mitre.org

* src/prover9.pl: Added a translator from cpsalogic output to
prover9 syntax.

2011-05-13 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Reduction.hs (parMap): The option to compile CPSA
without using the parallel runtime has been removed.  The parallel
library comes with Haskell Platform, so it is always available
these days.

* cpsa.cabal (Executable cpsa): Added the GHC option -rtsopts when
the compiler is version 7.0.0 or greater.  In 7.0.0, needed
runtime option have been disabled for security reasons by default.

2011-05-12 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Logic/Logic.hs (precForm): Shortened the predicate's
name from precedes to prec.

* src/CPSA/Logic/Logic.hs (origForm): Added the orig predicate
which asserts the node of origination for each uniquely originating
atom.

* src/CPSA/Lib/Reduction.hs (origs): Added nodes of origination
of uniquely originating atoms for POV and shapes for cpsalogic.

* src/CPSA/Lib/Reduction.hs (commentPreskel):  Rewrote this
function so as to make its much more understandable.

2011-05-09 John D. Ramsdell ramsdell@mitre.org

* doc/cpsaspec.tex: Added the orig predicate to shape analysis
sentences so that eliminate a counterexample to Conjecture B.1.
The addition of this predicate in necessary because with out it,
there is no way to ensure that skeletons that model a description
of a skeleton preserve nodes of origination of uniquely
originating atoms.

2011-05-04 John D. Ramsdell ramsdell@mitre.org

* cpsa.cabal (Version):  Tagged as version 2.2.3.

2011-05-02 John D. Ramsdell ramsdell@mitre.org

* doc/cpsaprimer.tex: Added sections on macros, cpsaparameters,
and cpsalogic.

* doc/cpsaspec.tex: Extensively rewritten to improve readability
and reflect the current code base.  Added Appendix B that
describes the theory behind shape analysis sentences and
cpsalogic.

* src/CPSA/Lib/Strand.hs (pruneStrand): Added check for
homomorphism.  This fix slightly reduces CPSA's ability to prune.
This problem was notice while rewriting The CPSA Specification.

2011-04-25 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Reduction.hs (commentPreskel): The format of the
homomorphism comment in a shape changed to (maps (STRAND-MAP
SUBST) ...), where there may be more than one homomorphism.

2011-04-18 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Logic/Logic.hs (logic): Added the cpsalogic program.
It extracts an axiom in the language of first-order logic for each
problem and its shapes from a CPSA run. The axiom is modeled by
all realized skeletons.

2011-04-14 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Reduction.hs (commentPreskel): Added the
preskeleton symbol to input that is not the point-of-view
skeleton, but is the one used to generate it.

2011-04-11 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Reduction.hs (commentPreskel): For each shape,
added the homomorphism from the POV skeleton to it as a comment
using the key map.  The format is (map STRAND-MAP SUBST...), where
there may be more than one substitution depending on the algebra.

* src/CPSA/Lib/Algebra.hs: Added displayEnv to a Context.

2011-04-06 John D. Ramsdell ramsdell@mitre.org

* doc/cpsadesign.tex: Updated to reflect the current code base.

2011-03-29 John D. Ramsdell ramsdell@mitre.org

* cpsa.cabal (Version):  Tagged as version 2.2.2.

* src/CPSA/Lib/Cohort.hs (cowt): Added a duplicate substitution
removal filter so as to resolve a large memory usage bug when
analyzing Wang's Fair Exchange Protocol.

* tst/wang.lisp ("Wang's Fair Exchange Protocol"): Added new
test.

2011-03-22 John D. Ramsdell ramsdell@mitre.org

* doc/cpsaprimer.tex: Added the hashed value as key idea:
(defmacro (hash x) (enc "hash" (cat "hash" x)))

* tst/epmo-key-hash.scm, tst/epmo_acctnum-key-hash.lsp: Variants
of epmo and empo_acctnum that use the hashed value as the key.

2011-02-02 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Cohort.hs (solved): Disabled condition 2a for
protocols with role variables that are all atoms.  The use of
condition 2a is never fruitful in this case.

2011-02-01 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Cohort.hs (solved): Added condition 2a to the
solved predicate so that CPSA now finds the shape in targetterms8.

* src/CPSA/Lib/Notation.hs (decl): The sort in a declaration is
now printed after the variables, as in "a, b: name".

2010-12-27 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/SExpr.hs (abort): Close input handle when reporting
a failure.

* src/CPSA/Lib/SExpr.hs (isSym, isStr): Non-ASCII characters are
accepted as constituents of symbols and strings.

2010-12-20 John D. Ramsdell ramsdell@mitre.org

* cpsa.cabal (Version):  Tagged as version 2.2.1.

2010-12-16 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Diff/Main.hs (showDiff): Closed output handle when a
difference is found so as to ensure the output is flushed before
exiting signaling failure.

2010-12-15 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Graph/ExpandedView.hs (treelessView): Added
treelessView, an output format that just prints the skeletons.
It's meant to be used on cpsagraph input that is too large to
handle otherwise.

2010-12-14 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Graph/Loader.hs (loadFirst, loadNext): The loader
returns one preskeleton per call, rather than returning the list
of all preskeletons in the input.  This allows modes of operation
in which only a small portion of the input is in memory at any one
time.

2010-12-10 John D. Ramsdell ramsdell@mitre.org

* doc/cpsa.mk, doc/Make.hs: Changed the extension associated with
cpsagraph output from .xml to .xhtml.

* doc/cpsa.mk, doc/Make.hs: Changed the extension associated with
cpsaparameters output from .params to _parameters.txt.

2010-12-09 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Graph/Tree.hs: Dump commented out copy of the old
algorithm.

* src/CPSA/Graph/ExpandedView.hs (kdrawer): Replaced tree
sorting with a queue to produce a breadth first ordering of the
tree on output.  This change has a big impact on performance on
large inputs.

2010-12-08 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Graph/ExpandedView.hs (zoomControl): Omit need to run a
script at load time by adding the attribute onchange="zoom(event)".

2010-12-07 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Graph/ExpandedView.hs: Changed the scripting to better
support very large documents.  Instead of running a script to
insert the new control, this version builds the controls into the
document.  The script run a load time just registers event
handlers.

* src/CPSA/Graph/Tree.hs (forest): Changed data structures used to
form the forest so as to replace linear searches on lists with
binary searches on maps and sets.

2010-12-01 John D. Ramsdell ramsdell@mitre.org

* cpsa.cabal (Version):  Tagged as version 2.2.0.

2010-11-29 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Graph/Preskeleton.hs (addNode): Use the color blue to
distinguish realized reception nodes from transmission nodes.

* src/CPSA/Lib/Strand.hs (augment): Removed hullForAugmentation.
Hulling is now always performed after contractions, regular
augmentations, and listener augmentations.

2010-11-26 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Graph/*.hs: Added support for the cpsagraph option
--zoom.  This option adds support for SVG diagram scaling in
the expanded format, the one that generates an XML compound
document.  If the browser supports HTML5 sliders, cpsagraph
generates them, otherwise, it generates old style drop down lists.

2010-11-19 John D. Ramsdell ramsdell@mitre.org

* doc/*.scm: Updated examples to use herald forms.

* src/CPSA/Lib/Main.hs (getHerald): Added support for a herald
form that allows options specified on the command line to be
specified within an input file.

* src/CPSA/SimpleDiffieHellman/Algebra.hs (outFlow, inFlow):
Updated to handle (gen) and (exp h x).

2010-11-16 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Cohort.hs (testStrand): Corrected a flaw in which
this function incorrectly computed the public messages available
at a node when the node ordering is reversed, such as when using
the -r option or a reverse-search role hint.

2010-11-15 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Diff/Main.hs (main): Added cpsadiff, a program that
compares CPSA output files S-expression by S-expression, and
prints the first skeleton that differs.

* src/CPSA/Lib/Protocol.hs (Role):  Added the rsearch boolean that
is used to determine the order in which a strand is searched for a
test node.  The search is reversed if the role includes the
"reverse-search" key as one of its comments.

* src/CPSA/Lib/Entry.hs (gentlyReadSExpr): Added a version of the
S-expression reader that gently fails on error by printing the
error message to standard error and returning EOF.  Changed
cpsagraph, cpsashapes, and cpsapp to use this reader.  That way,
an aborted run can be processed by these programs.

2010-11-05 John D. Ramsdell ramsdell@mitre.org

* cpsa.cabal (Version): Tagged as version 2.1.2.

* src/CPSA/Lib/Main.hs (interp): Enabled displacement by default,
and changed the sense of the -d option.

2010-10-25 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/SimpleDiffieHellman/Algebra.hs: Changed algebra
signature so that gen is a constant.

2010-10-21 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Strand.hs (homomorphismFilter): Added a filter that
ensures there is a homomorphism from the parent to each member of
a cohort.

2010-10-20 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Strand.hs (hullByDeOrigination): Added a mode to
hulling based on deorigination.

2010-10-19 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/SimpleDiffieHellman/Algebra.hs (loadVar): For now,
variables of sort base are forbidden to deal with missing
contractions in the Diffie-Hellman Man-In-The-Middle example.

2010-10-15 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/SimpleDiffieHellman/Algebra.hs: Made the Simple
Diffie-Hellman algebra what one gets where one requests the
algebra diffie-hellman.

2010-10-14 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/{Basic,SimpleDiffieHellman}/Algebra.hs (places,
replace): Corrected these definitions so that they handle
occurrences of variables without a sort inclusion function.  For
example, the old version would not find I when in akey(invk(I))
when looking for the places at which akey(I) occurs.

2010-10-13 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/SimpleDiffieHellman/Algebra.hs: Added an implementation
of the Simple Diffie-Hellman algebra, one that supports only
commutativity in exponents.

* src/CPSA/SimpleDiffieHellman/Algebra.hs (foldCarriedTerms,
carriedPlaces): Despite there names, these two functions follow
the definition of heldBy, not carriedBy.

* src/CPSA/Lib/Protocol.hs (originates, originationPos): carriedBy
-> heldBy.

* src/CPSA/Lib/Cohort.hs (testNode): carriedBy -> heldBy.

* src/CPSA/Lib/Strand.hs (gainedPos, preskelWellFormed)
(deleteNodeRest): carriedBy -> heldBy.

2010-10-12 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Algebra.hs: Changed the signature of unify and
match so they return a list rather than a Maybe.

2010-10-06 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/DiffieHellman/Algebra.hs (specialize): Added code to
specialize an environment by mapping all generated variables to
one.  This is used when producing an environment for an instance.

2010-10-04 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/DiffieHellman/Algebra.hs: Modified algebra so that
bases are no longer atoms, and implemented a more realistic
version of derivability.

2010-10-02 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Algebra.hs: Added heldBy to support
Diffie-Hellman.

2010-09-23 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Notation.hs (mesg): Use [x,y,..]k instead of
E(k;x,y,...).

2010-09-17 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Graph/LaTeXView.hs (writeLnPreskel): Add Tree number
before printing a protocol.

2010-09-10 John D. Ramsdell ramsdell@mitre.org

* cpsa.cabal (Version): Tagged as version 2.1.1.

* src/CPSA/Graph/Tree.hs (assemble): To handle incomplete outputs,
assemble ignores unavailable seen children instead of signaling an
error.

2010-08-24 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Strand.hs (augCollapses): Pruning is now performed
only after augmentation, and only when the augmented strand is
involved.

2010-08-12 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Graph/LaTeXView.hs (matrix):  When drawing a skeleton,
communication edges between nodes with different messages is shown
with a dotted arrow as is already done for SVG diagrams.

2010-08-09 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Notation.hs: Added an infix notation for XHTML and
LaTeX output.  Enable by specifying the -i flag when invoking
cpsagraph or cpsapp.

2010-07-29 John D. Ramsdell ramsdell@mitre.org

* cpsa.cabal (Version): Tagged as version 2.1.0.

2010-07-23 John D. Ramsdell ramsdell@mitre.org

* cpsa.cabal (Cabal-Version): CPSA now assumes Cabal is version
1.6 or greater, and support for GHC 6.8 has been withdrawn.

* src/CPSA/Graph/Loader.hs (loadDefs): The graph program displays
the initial comments in an input file.

2010-07-14 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Main.hs (options): Four new command line options
have been added:
  -d         --displacement     enable displacement
  -c         --check-nonces     check nonces first
  -t         --try-old-strands  try old strands first
  -r         --reverse-nodes    try old nodes first

2010-07-09 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Strand.hs (contractAndOrder): Support for this
addition to authentication test solving has been removed.

* src/CPSA/Lib/Cohort.hs (contractions): Contraction has changed
so that it only solves the test for one position of the critical
message in the test node, not every position.  Previously, CPSA
was missing most general solutions due to contracting too many
positions at the same time.

* src/CPSA/Lib/Strand.hs (pruneStrands): The pruning condition now
checks to see that there is a variable renaming between the
preskeletons involved.  Previously, the only check ensured the map
was idempotent.

2010-07-08 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Cohort.hs (useEcapeSetInTargetTerms): Added an
option to include the escape set in the set of target terms.

2010-06-22 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Strand.hs (gainedPos): In a skeleton, a node with a
uniquely originating atom that is gained must be after the node of
origination.  It used to be that only nodes in which the atom is
acquired must have the ordering.

2010-06-18 John D. Ramsdell ramsdell@mitre.org

* cpsa.cabal (Version): Tagged as version 2.0.5.

* doc/cpsatheory.tex: Added theory document on authentication
tests.

2010-06-11 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Strand.hs (augCollapses): Added a collapsing phase
after adding a strand so that hulling succeeds without when
origination points on augmented strands move.

* src/CPSA/Lib/Strand.hs (hull): Added a better algorithm for
finding pairs of strands to hull.

2010-06-07 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Cohort.hs (cowt): As does cows, the cowt has to
iterate to ensure all places are considered.  This change fixes
the bug exposed by the tst/non_transforming.scm text case.

2010-06-03 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Cohort.hs (transformingNode): Removed junk in
output by applying the mgu filter to more substitutions used to
construct augmentations.  This fix has a dramatic effect on
performance for the NSL4 and NSL5 test cases.

2010-05-06 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Cohort.hs (cows): Update function to better match
correctness result in the upcoming algebra paper.

2010-04-28 John D. Ramsdell ramsdell@mitre.org

* cpsa.cabal (Version): Tagged as version 2.0.4.

* cpsa.cabal: Base versions are now base >= 3 &&< 5.

2010-04-20 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Strand.hs (acyclicOrder): Fix acyclic check by
analyzing all edges in graph, not just communication edges.

2010-04-15 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Strand.hs (firstSkeleton): Input skeletons are no
longer pruned.

2010-03-30 John D. Ramsdell ramsdell@mitre.org

* cpsa.cabal (Version): Tagged as version 2.0.3.

* src/CPSA/Lib/Cohort.hs (useEncryptionFirstOrder): Added switch
to determine critical message search order.

* src/CPSA/Lib/Strand.hs (skelNons, skelUniques): Use inheritRnon,
and inheritRunique for inherited origination assumptions.

2010-03-27 John D. Ramsdell ramsdell@mitre.org

* src/pp.pl: Added an SWI-Prolog version of the pretty printer in
CPSA.Lib.Pretty.

* src/cpsa.pl: Added an SWI-Prolog version of the CPSA specific
pretty printer in CPSA.Lib.Printer and support for skeleton
transformations.

2010-03-11 John D. Ramsdell ramsdell@mitre.org

* cpsa.cabal (Version): Tagged as version 2.0.2.

* src/CPSA/Graph/Loader.hs (itrace): When computing the trace of
an instance, use the traces comment if it is available.

2010-03-11 John D. Ramsdell ramsdell@mitre.org

* cpsa.cabal (Version): Tagged as version 2.0.1.

2010-03-10 John D. Ramsdell ramsdell@mitre.org

* src/cpsa.el: Added Emacs support for skeleton transformations.

2010-03-07 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Basic/Algebra.hs (rootName):  Improved renaming
algorithm used to avoid collisions while printing variables.

2010-03-05 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Strand.hs (roleOrigCheck): Added check that
unique origination position is preserved by inheritance.

2010-03-04 John D. Ramsdell ramsdell@mitre.org

* cpsa.cabal (Version): Tagged as version 2.0.0, the first release
for the public.

2010-03-01 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/SExpr.hs (load): Load now returns one S-expression
per call.

2010-02-19 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Loader.hs (loadPosBaseTerm): Added a missing check
that ensures a non-originating term at given length is an atom.

* doc/Make.hs (cpsa): Made *.sch the extension for problems
that use Diffie-Hellman.

2010-02-15 John D. Ramsdell ramsdell@mitre.org

* cpsa.cabal (Version): Tagged as version 1.5.5.

* src/CPSA/Lib/Loader.hs:  Added better error messages for roles
and preskeletons that are not well formed.

2010-02-13 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Basic/Algebra.hs:  Enforce a canonical form for terms
so that term equality is just structural equality.

2010-02-08 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Cohort.hs (testNode): Changed order in which
critical message are picked to look at encryption tests before
nonce tests.

2010-02-05 John D. Ramsdell ramsdell@mitre.org

* cpsa.cabal (Version): Tagged as version 1.5.4.

2010-02-04 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Strand.hs (origCheck): For pruning, added a check
that insures that origination assumptions are honored by the
homomorphisms associated with pruning.

2010-01-29 John D. Ramsdell ramsdell@mitre.org

* doc/cpsauser.html (Visualization): Added a comment that notes
that cpsagraph draws dashed lines between nodes with terms that
are equivalent, but not syntactically identical.

* src/CPSA/Lib/Strand.hs (Preskel): Preskeletons retain a comment
that is given in the input.

2010-01-21 John D. Ramsdell ramsdell@mitre.org

* doc/cpsa.mk (%.sch): Added a rule that runs CPSA with the
Diffie-Hellman algebra for *.sch files.

* tst/completeness-test.scm: Added new example

2010-01-07 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Strand.hs (copresentVertices): Fixed a bug, and now
contractions with ordering codes works, when
Cohort.useContractionsWithOrdering is True.

2010-01-06 John D. Ramsdell ramsdell@mitre.org

* cpsa.cabal (Version): Tagged as version 1.5.3.

2009-12-21 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Cohort.hs (mgus): Enabled mgu filtering on
contractions and regular augmentation.

2009-12-20 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Basic/Algebra.hs (moreGeneral): Original implementation
failed to consider variables in the range of the more general
substitution.

2009-12-17 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Graph/Preskeleton.hs (addEdge): In a skeleton diagram,
an edge between nodes that do not agree on their message is
displayed with a dashed line.

2009-11-16 John D. Ramsdell ramsdell@mitre.org

* cpsa.cabal (Version): Tagged as version 1.5.2.

2009-11-10 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Strand.hs (precedesCheck): Added the requirement to
pruning that ordering relations associated with the more
general (pruned) strand are implied by the less general strand.

2009-10-31 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Protocol.hs (Role): Added support for delaying the
inheritance of a role non-origination assumption by adding a
length specification to role non-origination declarations.

2009-10-26 John D. Ramsdell ramsdell@mitre.org

* cpsa.cabal (Version): Tagged as version 1.5.1.

2009-10-24 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Cohort.hs (specialization): Generalization no
longer uses pruning.

2009-10-24 John D. Ramsdell ramsdell@mitre.org

* license.txt: Changed license to BSD.

2009-10-15 John D. Ramsdell ramsdell@mitre.org

* cpsa.cabal (Version): Tagged as version 1.5.0.

2009-10-14 John D. Ramsdell ramsdell@mitre.org

* src/preskel.sh: Added a script to change defpreskeleton to
defskeleton.

* src/CPSA/Lib/Loader.hs (loadSExpr): Changed defpreskeleton
keyword to defskeleton.

2009-10-10 John D. Ramsdell ramsdell@mitre.org

* cpsa.cabal (Extra-Source-Files): Added files left out of a
distribution so that the documentation compiles.

* {doc,tst}/README: Added a doc and tst read me

2009-10-03 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Strand.hs (checkOrigs): Isomorphism orig check now
uses matching.  Isomorphism checking now works in diffie-hellman.

2009-10-01 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Algebra.hs (encryptions): Encryptions that occur in
other encryption are now required to be later in the list.

* cpsa.cabal (Version): Tagged as version 1.4.9.

2009-09-30 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Strand.hs (roleOrigCheck): Role origination check
is now omitted when the inheriting strand is too short to inherit
a unique origination assumption.

2009-09-22 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Cohort.hs (useMguFilter): Turned off all mgu
filtering for contractions and augmentations.

* src/CPSA/Lib/Algebra.hs: Changed signature for unification and
matching so as to pass through a variable generator for
Diffie-Hellman.  Threaded the variable generator throughout the
library as needed.

* src/CPSA/Diffie-Hellman/Algebra.hs:  Added a module for
analyzing protocols that use Diffie-Hellman.  Its unifier and
matcher make use of fresh variable generation.

2009-09-16 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Cohort.hs (mgus): Added a filter that removes
non-most general unifiers from a list of contractions after the
list has been filtered to ensure each member solves the test.  For
each role considered during augmentation, added a filter that
removes non-most general unifiers from the list of augmentations
after the list has been filtered to ensure each member solves the
test.

2009-08-28 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Cohort.hs (testDestroyingContractions): Added a
filter that removes non-most general unifiers from the generated
list of potential contractions.

2009-08-18 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Displayer.hs (displayOpTerm, displayOpTerms): Terms
in the operation field may contain variables not in the skeleton.
Two functions were added for printing terms is the operation
field.  These functions extend the display context as needed.

2009-08-05 John D. Ramsdell ramsdell@mitre.org

* cpsa.cabal (Version): Tagged as version 1.4.8.

* tst/{encsig.scm,sigenc.scm}: Added tests for labeled named akey
operations.

2009-08-03 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Basic/Algebra.hs:  Added labeled named akey operations
(pubk STRING ID) and (privk STRING ID).

2009-08-02 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Algebra.hs (lte):  Added more general substitution
predicate to the algebra interface.

2009-07-24 John D. Ramsdell ramsdell@mitre.org

* cpsa.cabal (Version): Tagged as version 1.4.7.

* src/CPSA/Lib/Strand.hs (permutations): Reversed the order in
which strands are matched, and found a big performance
improvement.

* src/CPSA/Lib/Loader.hs (loadRole): Unused variables in a role
are now silently dropped instead of causing an error message.

2009-07-21 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Strand.hs (permutations): Intertwined the
computation of permutations with the substitutions that match
traces.

2009-07-11 John D. Ramsdell ramsdell@mitre.org

* cpsa.cabal (Version): Tagged as version 1.4.6.

2009-07-08 John D. Ramsdell ramsdell@mitre.org

* doc/cpsaprimer.tex (Section Advice): Added a description of how
to use CPSA for protocol design and made other improvements.

2009-07-07 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Cohort.hs (maybeAug): Use a role's trace as a
template instead of generating a fresh instance for that purpose.

2009-07-01 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Graph/LaTeXView.hs (latexView):

2009-06-23 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Search.hs (solve): The top-level search loop is now
implemented in the IO monad using tail recursive functions so as to
ensure data is released when it should.

2009-06-21 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Search.hs (solve): Added no isomorphism checking
mode (--noisochk).  In noisochk mode, isomorphism checks are
avoided by not identifying duplicate skeletons and by not
generalizing realized skeletons.

* src/CPSA/Lib/Search.hs (Params): Collected runtime parameters
into a record.

* src/CPSA/Lib/Search.hs (dump): Dump no longer generalizes
realized skeletons.  It just dumps them quickly.

2009-06-19 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Strand.hs (generalize): Perform variable separation
last as it could take a long time.

2009-06-17 John D. Ramsdell ramsdell@mitre.org

* doc/cpsaprimer.tex: Updated the Needham-Schroeder example, added
the collapsing operation, and fix other minor problems.

2009-06-14 John D. Ramsdell ramsdell@mitre.org

* doc/cpsadesign.tex: This document was rewritten.  It now assumes
its reader have already read the CPSA specification
(doc/cpsaspec.tex).  As a result, it focuses on implementation
issues, and leaves correctness issues to the specification.

2009-06-11 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Strand.hs (instRnon,instRunique): Filter
origination assumptions using the terms in the instance's trace.

* src/CPSA/Lib/Strand.hs (separateVariable): Don't memoize subsets
computation.  It causes memory problems when a large permutation
is used infrequently.

2009-06-10 John D. Ramsdell ramsdell@mitre.org

* cpsa.cabal (Version): Tagged as version 1.4.5.

2009-05-29 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Strand.hs (isomorphic): Don't memoize
permutations--can cause excessive use of memory.

2009-05-28 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Entry.hs: Code common to several programs has been
moved into the Entry module and shared.

2009-05-27 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/{Search.hs,Expand.hs}: CPSA now expands macros
rather than using a preprocessor for the task.  The cpsapp program
now just pretty prints its input.

* src/CPSA/Pretty/Main.hs: The source for the cpsapp program has
moved into another directory as it no longer macro expands its
input.

* doc/cpsa.mk: Makefile no longer has preprocessor support.

* doc/cpsaoverview.tex: Add a short overview of CPSA.

* src/CPSA/Annotations/Formulas.hs (keywords): "t" and "f" are no
longer keywords in formulas.  Use (and) for truth and (or) for
falsehood.

2009-05-22 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Macros/Main.hs (prettyPrint): Add -p option so that
cpsapp pretty prints without macro expansion.

* doc/cpsa.mk: Makefile now save preprocessor output.

2009-05-12 John D. Ramsdell ramsdell@mitre.org

* cpsa.cabal (Version): Tagged as version 1.4.4.

* cpsa.cabal (Flag par): Changed the default for the par flag to
true so that CPSA is compiled with multiprocessor support by
default.

2009-05-11 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/SExpr.hs (Tokens): Added strictness annotations
that allows the reading of much larger input files and improves
performance.

2009-05-10 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Strand.hs (collapse): Added the collapse operation
which applies to a shape.  It attempts to unify pairs of strands
and searches for shapes starting from the results.

* src/CPSA/Shapes/Shapes.hs (shapes): Reduced memory requirements
by use of shape notes and added support for output in which a
shape is a descendent of a shape.

2009-05-09 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Search.hs (commentPreskel): Added a shape note to
be used by the cpsashapes program.

2009-05-07 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Strand.hs (hull, enrich, prune): With the
correction of the pruning algorithm, the preskeleton reduction
rules are now applied in the order of hull, enrich, and then
prune.

2009-05-05 John D. Ramsdell ramsdell@mitre.org

* doc/cpsaspec.tex: Added the sources to the CPSA document that
specifies CPSA as a reduction system.

2009-05-04 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Strand.hs (pruneStrands): The pruning operation
now uses a substitution that is idempotent for strands other than
the pruned strand.

2009-04-29 John D. Ramsdell ramsdell@mitre.org

* cpsa.cabal (Version): Tagged as version 1.4.3.

* src/CPSA/Lib/Cohort.hs (specialization): The homomorphism check
is applied to the preskeleton because it matches the strand
mapping.  This fixes a bug that reject some valid generalizations.

2009-04-19 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Algebra.hs (Subst): A substitution is now required
to be ordered.

* src/CPSA/Basic/Algebra.hs (unifyChase): The exported version of
a substitution no longer requires chasing to find the canonical
representative of the equivalence class of variables determined to
be equal.  This means there is a canonical representation of an
external version of a substitution that is ordered.

* src/CPSA/Basic/Algebra.hs (substitute): Corrected a bug in
substitution associated with variables of sort mesg.  The
correction effects tst/dy.scm only.

2009-04-18 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Basic/Algebra.hs (IdMap): Use Data.Map Id Term for
substitutions instead of association lists.

* src/CPSA/Basic/Algebra.hs (loadVar): Removed sort "term" as a
synonym for "mesg".

2009-04-14 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Basic/Algebra.hs (compose):  Corrected a bug in the
code that removes the trivial bindings from s2 to form s4.  The
fix changes the output for tst/dy.scm.

2009-03-30 John D. Ramsdell ramsdell@mitre.org

* cpsa.cabal (Version): Tagged as version 1.4.2.

2009-03-27 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Search.hs (parMap): Added support for SMP
parallelism.  To enable, configure with -fpar.

2009-03-22 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Printer.hs: Added a CPSA specific pretty printer
and made it so that the roles in protocols are laid out using the
group layout.

2009-03-03 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Pretty.hs (grp): Added support for the group layout
and used it for the top-level lists.

2009-03-01 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Cohort.hs (unifyTerm): For contraction, the
unifyOnPaths function does not check to see if its result has the
desired properties and it turns out that sometimes it doesn't.
Now unifyTerm repeats its operations until the desired properties
hold.

* src/CPSA/Lib/Cohort.hs (unifyPast): For augmentation, the
original unifyPast failed to each to see if the final result has
the desired properties, and it turns out that sometimes it
doesn't.  Now unifyPast repeats its operations until the desired
properties hold.

2009-02-23 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Loader.hs (loadInsts): Check for preskeletons
with no strands.

2009-02-21 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Parameters/Main.hs,Flow.hs: Added a data flow analysis
of roles.

2009-02-16 John D. Ramsdell ramsdell@mitre.org

* cpsa.cabal (Version): Tagged as version 1.4.1.

* doc/*: Update document to reflect changes.

2009-02-10 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Macros/*.hs: Added the macro preprocessor cpsapp.

2009-02-08 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Annotations/Annotations.hs (loadFormulas): Allow base
terms as principals so as to allow keys as principals.

2009-01-03 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Strand.hs (changeLocations): Changed variable
separation so that so that two candidates are generated for a
location configuration, one that maps the changes to uniques, and
the other does not.  This fixes a generalization bug.

2009-01-31 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Cohort.hs (solved): The cohort is now filtered so
that every member is solved.

2009-01-03 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Strand.hs (changeLocations): When separating a
uniquely originating base term, either the term or its clone is
uniquely originating.

2008-12-28 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Basic/Algebra.hs (Symbol): Removed tag as a sort, and
made tags constants of sort mesg.

2008-12-24 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Basic/Algebra.hs (matchVarRenaming): Use sets to
improve injective test.

2008-12-09 John D. Ramsdell ramsdell@mitre.org

* cpsa.cabal (Version): Tagged as version 1.4.0.

2008-12-08 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Search.hs (nextState): Added the --dfs command line
option to allow the selection of depth first search.

* src/CPSA/Graph/SVG.hs (kbutton): Duplicate nodes are now
rendered in italic so as to make it easier to distinguish them
from tree nodes.

* src/CPSA/*/{Main.hs,Search.hs}: Added default option values to
command line help message.

2008-12-03 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Basic/Algebra.hs: Allowed variable declaration forms to
declare more than one variable of a given sort.

* src/CPSA/Basic/Algebra.hs: Added the sort data, a second
sort similar to sort text.  The second sort can be used to
partition nonce-like data from ordinary text-like data.

* src/CPSA/Basic/Algebra.hs: Changed the symbol used for the top
sort from "term" to "mesg".

* src/CPSA/Lib/SExpr.hs (isStr): The characters that make up a
string are the ASCII printing characters omitting double quote and
backslash.

2008-12-02 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Search.hs (nextState): Switched back to
breadth-first-search and removed support for parallelism.
Breadth-first-search makes it more likely shapes are printed in
ill-fated runs.

* src/CPSA/Graph/Main.hs (interp): Changed the default output
format to expanded format.

2008-12-01 John D. Ramsdell ramsdell@mitre.org

* cpsa.cabal (Version): Tagged as version 1.3.2.

2008-11-30 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Strand.hs (roleOrigCheck): Added new well-formed
preskeleton check.  Every uniquely originating role term mapped by
an instance must be mapped to a term that originates on the
instance's strand.

2008-11-19 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Search.hs (nextState): Switched to
depth-first-search by adding freshly generated skeletons to the
front of the to do list.

* src/CPSA/Lib/Strand.hs (isomorphic): Added same number of
variables in isomorphism check to speed it up.

* src/CPSA/Lib/Algebra.hs: (matchVarRenaming) The special purpose
renaming detector was eliminated in favor of using matching and
predicate that decides if a match is one-to-one and
variable-to-variable.

2008-11-16 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Strand.hs (deleteNode): Use the transitive closure
of the communication ordering before deleting a node.  This change
fixes a minimization bug.

2008-11-14 John D. Ramsdell ramsdell@mitre.org

* cpsa.cabal (Version): Tagged as version 1.3.1.

* src/CPSA/Lib/Cohort.hs (addListeners):  Listeners are now added
only for the decryption keys of the top most encryptions in the
escape set.  This fixes a bug caused by adding listeners for
decryption keys of internal encryptions in the escape set.

* src/CPSA/Lib/Algebra.hs (decryptionKey):  Changed the name from
keysUsedBy to reflect the fact only the decryption key from the
top most encryption is returned.

* src/CPSA/Lib/Algebra.hs (protectors): Changed the name from
decrypts to better reflect the purpose of the function.

2008-11-10 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Annotations/Annotations.hs (obligations): The alist key
theorems was replaced with obligations as it lists the formulas
one is obligated to show are theorems to show the protocol is
sound.

2008-11-07 John D. Ramsdell ramsdell@mitre.org

* cpsa.cabal (Version): Tagged as version 1.3.0.

* doc/cpsauser.html:  Added cpsaannotations documentation.

2008-11-02 John D. Ramsdell ramsdell@mitre.org

* doc/cpsadesign.tex: Added a complete draft of the algorithm part
of the design document.

2008-10-27 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Strand.hs (deleteNode): When deleting a strand,
this function used to apply the inverse of the correct permutation
to the prob field, but now applies the correct permutation.

2008-10-19 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Graph/Main.hs (options): Add --compact option to select
the use of the compact output format.

2008-10-15 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Cohort.hs (targetTerms): Added term extraction from
the escape set for use as targets for binding with the carried
terms in an outbound when looking for a transforming node.  This
change allows CPSA to find the flaw in the Dolev-Yao Example 1.3
test case.

2008-10-14 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Cohort.hs (augmentations): Changed the augmentation
algorithm to use foldCarriedTerms.

* src/cpsacgi.py: Added expanded graph output to the CGI script.
Added support for annotations.

2008-10-13 John D. Ramsdell ramsdell@mitre.org

* doc/cpsaprimer.tex: The CPSA Tutorial was renamed to the CPSA
Primer.

2008-10-08 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Strand.hs (forgetAssumption): Fix a bug that allows
assumption forgetting to work again.

2008-10-04 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Basic/Algebra.hs (loadEnc): When enc has more that two
terms, a concatenation is added to all but the last term.

* src/CPSA/Lib/Strand.hs (tryPerm): An isomorphism testing bug was
fixed.  The permutation map was applied to the wrong ordering.

2008-10-03 John D. Ramsdell ramsdell@mitre.org

* cpsa.cabal (Version): Tagged as version 1.2.3.

* src/CPSA/Graph/ExpandedView.hs (header): The title generated for
the expanded view now includes the name of the first protocol to
be graphed.

* src/CPSA/Lib/Search.hs (search): The comment generated for
non-default strand bounded or step count limited runs contained
an illegal character that has been removed.

* src/CPSA/Basic/Algebra.hs (displaySubst): This function displays
substitutions without requiring that the sort of every variable be
known.  The function that infers enough sort information to
perform the display was correct, thus fixing a reported bug.

2008-09-30 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Algebra.hs (Context): Changed the interface to
contexts to allow them to be extended.  Also, eliminated
displayEnv from the Context type class.  It can be written using
other functions in the interface.

2008-09-26 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Cohort.hs (transformingNode): The fix on the 22th
wasn't right, it unified on all outgoing terms.  The function now
unifies an outgoing term only when it is a transforming node.

2008-09-24 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/*/*.hs:  Loading works with all monads.  With this
change, there is no longer a need for using the flexible instances
language extension.

2008-09-23 John D. Ramsdell ramsdell@mitre.org

* cpsa.cabal (Version): Tagged as version 1.2.2.

2008-09-22 John D. Ramsdell ramsdell@mitre.org

* cpsa.cabal (Cabal-Version): Updated to use Cabal 1.2 section
syntax.

* src/CPSA/Lib/Cohort.hs (transformingNode): Changed the
augmentation algorithm so that it continues looking for more
transforming nodes farther down a trace after it finds one
transforming node.

* src/CPSA/Lib/Search.hs (par): Added HAVE_PAR preprocessor symbol
which should be defined when Control.Parallel is available.

* src/CPSA/*/*.hs:  A major code clean up was completed.

2008-09-17 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Strand.hs (Gist): Created a data structure designed
to support only skeleton isomorphism checks, thus improving the
performance and memory requirements associated with the check.

2008-09-15 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Annotations/*.hs: Added the cpsaannotations program
that propagates annotations on protocols to annotations on
realized skeletons.

2008-09-06 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Main.hs (main): Algebras export a name and the
origin used to generate fresh variables.

2008-08-29 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Strand.hs (weakenOrderings): Corrected a bug by
adding the strand succession edges before taking the transitive
closure.

2008-08-25 John D. Ramsdell ramsdell@mitre.org

* cpsa.cabal (Version): Tagged as version 1.2.1.

2008-08-23 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Strand.hs (weakenOrderings): Changed the weakening
algorithm so as to use the transitive closure.  The result is all
possible weakenings are considered, and a reported bug was fixed.

2008-08-19 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Graph/ExpandedView.hs (kdrawer): Added the definition
of the marker for arrow heads so that arrow heads now appear in
preskeleton drawings.

2008-08-18 John D. Ramsdell ramsdell@mitre.org

* cpsa.cabal (Version): Tagged as version 1.2.0.

* src/CPSA/Lib/Utilities.hs (permutations): Used permutations from
Haskell 1.3 as a model, and ensured the identity permutation is
the first one in the result.

* doc/cpsatutorial.tex, doc/cpsauser.html: Changed the
introductions to note that the search for shapes in the current
implementation is known to be not complete.  See tst/dy.scm.

2008-08-11 John D. Ramsdell ramsdell@mitre.org

* tst/Makefile: Changed the file extensions to be consistent with
the ones used in doc/cpsa.mk.

* src/CPSA/Basic/Loader.hs: Added tags as non-atomic terms, and
removed tagged concatenation.

* src/CPSA/Graph/ExpandedView.hs: Added support for the expanded
view option (-x) in cpsagraph.

2008-08-04 John D. Ramsdell ramsdell@mitre.org

* cpsa.cabal: Added support for local installation.

* doc/cpsa.mk: Added GNU Make rules for inclusion.

* src/CPSA/Lib/Search.hs: Reorganized search loop so that
S-expression printing is done outside the search code.

* src/CPSA/Lib/Search.hs: Modified the abort dump routine so that
it minimizes when it is asked to print a realized skeleton.

2008-07-31 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/*/Loader.hs: Ignore top-level S-expression of the form
(comment S-EXP*) rather than signal an error so as to allow file
level comments as S-expressions.

* src/CPSA/*/*: Renamed cpsabasic to cpsa, as that program can now
provide support for more than one algebra.

2008-07-28 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Algebra.hs: Added foldTerms to interface. It folds
a function through a term applying it to each term that occurs in
the term.

2008-07-26 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Algebra.hs: Added carriedPlaces and ancestors to
the interface and moved existsOnAllPathsToTarget and
foldOnAllPathsToTarget to CPSA.Lib.Cohort as they no longer need
to be implemented by each algebra.

2008-07-25 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/*/*.hs: Reorganized the algebra interface so that as
algebra exports an algebra specific protocol loader so as to allow
CPSA to handle more than one algebra at a time.  Algebras are now
linked into the program in CPSA.Lib.Main.

2008-07-24 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Search.hs: Added the --bound option to limit the
number of strands in a skeleton.

2008-07-15 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Strand.hs (validateSubst): Changed the result of a
failure to find a uniquely-originating atom to False rather than
an signaling an error.  The addition of unique origination
assumption forgetting makes this case no longer an error.

2008-06-16 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Basic/Main.hs (compose): Use algorithm from Handbook of
Automated Reasoning, remembering to delete identity bindings.

2008-06-05 John D. Ramsdell ramsdell@mitre.org

* cpsa.cabal (Version): Tagged as version 1.1.0.

* doc/cpsadesign.tex: Added document status and other small
improvements in preparation for release.

2008-05-27 John D. Ramsdell ramsdell@mitre.org

* doc/strands.mp: Placed strand macros in a separate file.

2008-05-23 John D. Ramsdell ramsdell@mitre.org

* src/httpd_allow_execmem.te: Added this SELinux refpolicy module
so as to allow Haskell to run as a CGI script.

2008-05-22 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Displayer.hs (displayOperation): Changed the
wording for the operation used to derive a skeleton.

2008-05-19 John D. Ramsdell ramsdell@mitre.org

* src/cpsa.{sh,py}: CGI scripts modified to work with SELinux.

2008-05-13 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Shapes/Main.hs: Added output margin option.

* src/CPSA/Lib/Strand.hs (Method): Added a parameter to each
minimization method.

2008-05-04 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Strand.hs (forgetAssumption): Added the
origination assumption forgetting minimization operation.

2008-05-04 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Search.hs (options): Added output margin option.

2008-04-30 Joshua D. Guttman guttman@mitre.org

* src/CPSA/Basic/Main.hs: Re-enabled indeterminates

2008-02-27 John D. Ramsdell ramsdell@mitre.org

* src/CPSA/Lib/Protocol.hs: Add a comment field in protocols and
roles.

2008-02-20 John D. Ramsdell ramsdell@mitre.org

* cpsa.cabal (Version): Tagged as 1.0.0, the initial release.