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authorPhilipp Gesang <pgesang@ix.urz.uni-heidelberg.de>2012-02-24 16:56:17 +0100
committerPhilipp Gesang <pgesang@ix.urz.uni-heidelberg.de>2012-02-24 16:56:17 +0100
commit2ad1a2fae027aa6c1f4c1259574b5aa506f833a8 (patch)
tree628924d2965d9f52b65478a42664b5dfdea86767 /doc/context/third
parent8d93a4c0ccbfb9b3fb1f17ccecdc5bf430f18154 (diff)
downloadenigma-2ad1a2fae027aa6c1f4c1259574b5aa506f833a8.tar.gz
minor fixes; [doc] example of two-pass filter
Diffstat (limited to 'doc/context/third')
-rw-r--r--doc/context/third/enigma/enigma_manual.tex50
1 files changed, 46 insertions, 4 deletions
diff --git a/doc/context/third/enigma/enigma_manual.tex b/doc/context/third/enigma/enigma_manual.tex
index 281ae93..efb4fe2 100644
--- a/doc/context/third/enigma/enigma_manual.tex
+++ b/doc/context/third/enigma/enigma_manual.tex
@@ -1,4 +1,10 @@
-\startdocchapter[title=Example: Encrypted Document]
+\startdocchapter[title=Usage]
+
+\startdocsection[title=Loading the Module/Package]
+ \TODO{instuctions for plain, latex + ctx}
+\stopdocsection
+
+\startdocsection[title=Basic Functionality]
Encrypt the text of your document using the script interface. For
a start try out the settings as given in below listing.
@@ -9,11 +15,11 @@ mtxrun --script mtx-t-enigma \
day_key = B I II III 01 01 01, \
rotor_setting = xyz, \
verbose=0" \
- --text="Nobody can read this."
+ --text="Gentlemen don’t read each other’s mail, Mr. Turing\!"
\stoptyping
This will result in the thoroughly scrambled string
-\type{zdkbxwwnwkazpokvgr}.
+\type{omribshpwfrfjovkntgqgiabbkhjpxmhdztapkatwrvf}.
Then, use the same settings you encrypted the text with in your
document.
@@ -30,7 +36,7 @@ document.
\starttext
\startsecretmessage
-zdkbxwwnwkazpokvgr
+ omribshpwfrfjovkntgqgiabbkhjpxmhdztapkatwrvf
\stopsecretmessage
\stoptext
@@ -41,6 +47,42 @@ reappear.
Notice that punctuation is substituted with the letter “x” before
encryption and that spaces are omitted.
+\stopdocsection
+
+\startdocsection[title=Uses and Abuses]
+
+In \LUATEX, \identifier{callback}s may stack. This allows filtering the
+input through many enigma machines successively. For instance, in the
+following listing, two instances of the same machine are generated and
+applied.
+
+\startcontexttyping
+\usemodule[enigma] %% load the module
+\defineenigma [secretmessage] %% generate and
+\setupenigma [secretmessage] [ %% configure a machine
+ other_chars = ok,
+ day_key = B IV V II 01 01 01 AD CN ET FL GI JV KZ PU QY WX,
+ rotor_setting = foo,
+ verbose=3,
+]
+
+%% now, copy the first machine’s settings
+\defineenigma [othermessage] [secretmessage]
+
+%% here we go!
+\starttext
+
+\startothermessage %% enable machine 1
+\startsecretmessage %% enable machine 2 while no 1 is active
+Encryption equals decryption.
+\stopothermessage
+\stopsecretmessage
+
+\stoptext \endinput
+\stopcontexttyping
+
+\stopdocsection
+
\stopdocchapter
\startdocchapter[title=Acknowledgements]