NAME

SYNOPSIS

DESCRIPTION

cipherProc configure ?options?

Configure the settings for the baconian cipher. Valid options are:

cipherProc configure -ciphertext string

cipherProc configure -ct string

Set the ciphertext for this cipher instance to string. Invalid letters or numbers in the ciphertext are silently discarded.

cipherProc configure -stepinterval n

Set the display interval while solving to n. The stepcommand procedure will be called for every nth iteration while solving. This is used to provide user feedback while solving is taking place.

cipherProc configure -stepcommand proc

Set the display command while solving to proc. This command will be called for every nth iteration while solving. The arguments for this procedure are:

stepcommand iter key pt

iter is the current iteration number. key is the current value of the key that is being used. pt is the plaintext that is produced with this key.

cipherProc configure -bestfitcommand proc

Set the best fit display command while solving to proc. This command will be called every time a better solution is found while autosolving. The arguments for this procedure are:

bestfitcommand iter key value pt

iter is the current iteration number. key is the current value of the key that is being used. value is the value of the metric used to judge how good this solution is. The value is often a digram or trigram frequency count. pt is the plaintext that is produced with this key.

cipherProc configure -language language

This option is currently ignored for all cipher types. Set the current cipher language to language. If the cipher has a solve method then digram frequencies for this language are used to determine the best fit. If the language is not specified or not known then english is used.

cipherProc cget option

Look up the value for a given option. Valid options are:

cipherProc cget -type

Returns the type of this cipher. In this case, baconian

cipherProc cget -ciphertext

cipherProc cget -ct

Return the ciphertext for this cipher.

cipherProc cget -plaintext

cipherProc cget -pt

Return the plaintext for this cipher based on the current key setting.

cipherProc cget -key

Returns the current key setting for this cipher. The result can be passed back to this cipher instance or another cipher with the cipherProc restore subcommand.

cipherProc cget -alphabet

undocumented feature

cipherProc cget -bacontext

undocumented feature

cipherProc cget -length

Returns the length of the ciphertext for this cipher. 0 is returned if the ciphertext has not been set.

cipherProc cget -period

Return the period for this cipher.

cipherProc cget -stepinterval

Returns the current value of the stepinterval.

cipherProc cget -stepcommand

Returns the name of the procedure currently set for the stepcommand. An empty string is returned if no stepcommand is set.

cipherProc cget -bestfitcommand

Returns the name of the procedure currently set for the bestfitcommand. An empty string is returned if no bestfitcommand is set.

cipherProc cget -language

Returns the name of the language used for this cipher.

cipherProc substitute ct pt

Substitutes the ct string for pt. If ct and pt are the same length, then pt is interpreted as bacon text and should consist solely of bacon values a and b. Otherwise the pt must be exactly 1/5 the length of the ct. The pt is first translated to its corresponding bacon text and then the substitution is performed.

pt does not need to appear in the ciphertext. ct and pt must be the same length. The substitute command calculates what key letter(s) would produce the specified ct from the pt and enters it in the cipher's key. After performing a substitution, you can use the cipherProc cget -plaintext command to look at the rest of the substitutions that the key change produced.

cipherProc undo ct

The undo command erases the bacon values for the specified ct letters.

cipherProc restore ct pt

The restore command restores the cipher's key to a previously stored state. The output from cipherProc cget -key can be passed back into the restore command to implement a crude save feature. Example:

set key [$firstCipher cget -key]
$secondCipher restore [lindex $key 0] [lindex $key 1]

cipherProc locate tip ?ct?

Locate a possible position for the tip in the ciphertext. The tip is dragged along the ciphertext until a valid substitution is found. If the ct argument is specified, the tip is dragged along starting where ct appears in the ciphertext.

cipherProc solve

Solve the current cipher. Solutions are found by looping through all possible 26^2 bacon alphabet keys. When this command returns, it will set the current key for the cipher to the best one that was found.