Ejemplo n.º 1
0
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])])
Ejemplo n.º 2
0
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
Ejemplo n.º 3
0
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
Ejemplo n.º 4
0
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.")
Ejemplo n.º 5
0
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
Ejemplo n.º 6
0
def getKeyCharCandidates(cipherFile, frequencyFile, keyLength, nrOfCandidates):
    return getKeyCharCandidates_(textoperations.getFileAsString(cipherFile), frequencyFile, keyLength, nrOfCandidates)
Ejemplo n.º 7
0
def freidmanTest(encryptedTextFile, minKey, maxKey):
    return friedmanTest_(textoperations.getFileAsString(encryptedTextFile), minKey, maxKey)