def test():
chiList = getKeyChiSquaredStatistics(textoperations.getFileAsString("duan.encrypt"), getPTableAlphabet("sweletterfrequency.txt"), 11)
for key in chiList:
print("Key for index: ", key[0])
temp = getNMinMax(key[1], 3, False)
print("Likley keys:", temp)
print("Corresponds to the character:", alphabet[key[1].index(temp[1])])
def getTAfileStringsList(filePath):
cFiles = []
for file in textoperations.getFilesInFolder(filePath):
if(file[-12:-8] == "text"):
cFiles.append(file)
cipherStrings = []
for fileName in cFiles:
cipherStrings.append(textoperations.getFileAsString(fileName))
return cipherStrings
def getPTableAlphabet(fileName):
"""Reads a file where every row have the letter and occurence as a percentage seperated by |"""
alphF = textoperations.getFileAsString(fileName).split('\n')
i = 0
for dataString in alphF:
dataString = dataString.split('|')
f = 0.0
f = float(dataString[1])
alphF[i] = [dataString[0], f]
i += 1
return alphF
def doCrypt(inFile, keyFile, outFile, encryptB):
if(os.path.exists(inFile) and os.path.exists(keyFile)):
if(encryptB):
inString = textoperations.getFormattedStringFromFile(inFile)
else:
inString = textoperations.getFileAsString(inFile)
keyString = textoperations.getFormattedStringFromFile(keyFile)
outString = ""
if(encryptB):
outString = encrypt(inString, keyString)
else:
outString = decrypt(inString, keyString)
textoperations.printOutputToFile(outFile, outString)
else:
print("Didn't find the keyfile or the inFile file.")
def getICforKeyLengths(start, stop, fileName):
cipherText = textoperations.getFileAsString(fileName)
answers = []
for i in range(start, stop+1):
answers.append([i, 0])
for i in range(start, stop+1):
answers[i-start][1] = getIndexOfCoincidence(cipherText, i)
maximum = 0.0
maxKey = 0
sKey = 0
sMax = 0.0
for keyIC in answers:
if(keyIC[1]>maximum):
sKey = maxKey
sMax = maximum
maximum = keyIC[1]
maxKey = keyIC[0]
print("Maximum IC found is: ", maximum, " for key of length ", maxKey)
print("Second largest pair is (", sKey, ", ", sMax, ")")
return answers
def getKeyCharCandidates(cipherFile, frequencyFile, keyLength, nrOfCandidates):
return getKeyCharCandidates_(textoperations.getFileAsString(cipherFile), frequencyFile, keyLength, nrOfCandidates)
def freidmanTest(encryptedTextFile, minKey, maxKey):
return friedmanTest_(textoperations.getFileAsString(encryptedTextFile), minKey, maxKey)