def test_cadenus_break():
- plaintext = sanitise('''It is a truth universally acknowledged, that a single man in
- possession of a good fortune, must be in want of a wife. However
- little known the feelings or views of such a man may be on his
- first entering a neighbourhood, this truth is so well fixed in
- the minds of the surrounding families, that he is considered the
- rightful property of some one or other of their daughters.''')
+ plaintext = sanitise('''You will rejoice to hear that no disaster has accompanied the
+commencement of an enterprise which you have regarded with such evil
+forebodings. I arrived here yesterday, and my first task is to assure
+my dear sister of my welfare and increasing confidence in the success
+of my undertaking.
+
+I am already far north of London, and as I walk in the streets of
+Petersburgh, I feel a cold northern breeze play upon my cheeks, which
+braces my nerves and fills me with delight. Do you understand this
+feeling? This breeze, which has travelled from the regions towards
+which I am advancing, gives me a foretaste of those icy climes.
+Inspirited by this wind of promise, my daydreams become more fervent
+and vivid.
+
+I try in vain to be persuaded that the pole is the seat of
+frost and desolation; it ever presents itself to my imagination as the
+region of beauty and delight. There, Margaret, the sun is for ever
+visible, its broad disk just skirting the horizon and diffusing a
+perpetual splendour. There—for with your leave, my sister, I will put
+some trust in preceding navigators—there snow and frost are banished;
+and, sailing over a calm sea, we may be wafted to a land surpassing in
+wonders and in beauty every region hitherto discovered on the habitable
+globe.
+
+Its productions and features may be without example, as the
+phenomena of the heavenly bodies undoubtedly are in those undiscovered
+solitudes. What may not be expected in a country of eternal light? I
+may there discover the wondrous power which attracts the needle and may
+regulate a thousand celestial observations that require only this
+voyage to render their seeming eccentricities consistent for ever. I
+shall satiate my ardent curiosity with the sight of a part of the world
+never before visited, and may tread a land never before imprinted by
+the foot of man. These are my enticements, and they are sufficient to
+conquer all fear of danger or death and to induce me to commence this
+laborious voyage with the joy a child feels when he embarks in a little
+boat, with his holiday mates, on an expedition of discovery up his
+native river. '''
+)
expected_key = 'swashbuckling'
- expected_score = Ptrigrams(plaintext)
+ chunk_len = len(transpositions_of(expected_key)) * 25
+ target = plaintext + pad(len(plaintext), chunk_len, 'a')
+ expected_score = Ptrigrams(target)
expected_keycol = make_cadenus_keycolumn(doubled_letters='vw', start='a',
reverse=True)
ciphertext = cadenus_encipher(plaintext, expected_key, expected_keycol)
- # dictionary = ['clearinghouse', 'computerising', 'counterclaims',
- # 'housewarmings', 'intravenously', 'liquefactions', 'somersaulting',
- # 'sportsmanlike', 'swashbuckling']
+ dictionary = ['clearinghouse', 'computerising', 'counterclaims',
+ 'housewarmings', 'intravenously', 'liquefactions', 'somersaulting',
+ 'sportsmanlike', 'swashbuckling']
- dictionary = ['swashbuckling']
+ # dictionary = ['swashbuckling']
- (key, keycol), score = cadenus_break(ciphertext, words=dictionary,
+ (key, keycol), score = cadenus_break(ciphertext, wordlist=dictionary,
fitness=Ptrigrams)
assert key == expected_key
projects / szyfrow.git / blobdiff