Exemplo n.º 1
0
def hash(plaintext, outputType = '-hex'):
	hashKey = None
	retval = 0
	try:
		# name the temporary files randomly
		# since the client and server are in the same dir, sometimes
		# when both tried to use openSSL simultaneously there were collisions
		temp_name = str(uuid.uuid1())
		plaintext_file = 'p' + temp_name
		key_file = 'k' + temp_name
		# write out input / create output files
		fileIO.writeFile(plaintext_file, plaintext)
		fileIO.writeFile(key_file, '')
		# run openssl hash command
		retval = subprocess.call(['openssl', 'dgst', '-sha256', outputType, '-out', key_file, plaintext_file])
		# read in the output
		hashKey = fileIO.readFile(key_file)
	finally:
		# delete temp files
		fileIO.removeFile(plaintext_file)
		fileIO.removeFile(key_file)
		# return the output
		if hashKey is None or retval != 0:
			raise Exception('Hash failed')
		else:
			return hashKey.replace('SHA256(plain.tmp)= ', '', 1)
Exemplo n.º 2
0
def storeFiletable(peer_name, dictionary):
	filetable_name = 'CA/' + peer_name + '/filetable.dat'
	keyfile = 'CA/' + peer_name + '/' + peer_name + '.key'
	# If we don't remove the file before rewriting it we get bad decrypts
	fileIO.removeFile(filetable_name)
	ciphertext = openSSL.encrypt(keyfile, str(dictionary))
	fileIO.writeFile(filetable_name, ciphertext)
Exemplo n.º 3
0
def encrypt(keyfile, plaintext):
	ciphertext = None
	retval = 0
	try:
		# name the temporary files randomly
		# since the client and server are in the same dir, sometimes
		# when both tried to use openSSL simultaneously there were collisions
		temp_name = str(uuid.uuid1())
		plaintext_file = 'p' + temp_name
		cipher_file = 'c' + temp_name
		# write out input / create output files
		fileIO.writeFile(plaintext_file, plaintext)
		fileIO.writeFile(cipher_file, '')
		# run openssl enc command
		with open(keyfile) as f:
			retval = subprocess.call(['openssl', 'enc', '-aes-256-cbc', '-a', '-pass', 'stdin', '-out', cipher_file, '-in', plaintext_file], stdin=f)
		# read in the output
		ciphertext = fileIO.readFile(cipher_file)
	finally:
		# delete temp files
		fileIO.removeFile(plaintext_file)
		fileIO.removeFile(cipher_file)
		# return the output
		if ciphertext is None or retval != 0:
			raise Exception('Encrypt failed')
		else:
			return ciphertext
Exemplo n.º 4
0
def storeFile(peer_name, net):
	peer_info = net.getPeerInfo()
	client_common_name = peer_info[4][0][1]

	filename = net.recv()
	file_contents = net.recv()

	fileIO.writeFile(tmp_file_dir + '/' + filename, file_contents)

	os.chdir('refmon')
	process = subprocess.Popen(['ocaml', 'RefMon.ml', peer_name, 'execute', client_common_name, 'put', filename], stdout=subprocess.PIPE)
	out, err = process.communicate()
	os.chdir('..')

	net.send(out.decode("utf-8"))
	fileIO.removeFile(tmp_file_dir + '/' + filename)

	print('Stored', filename, 'for', client_common_name)
Exemplo n.º 5
0
def hash(plaintext, outputType):
	hashKey = None
	retval = 0
	try:
		# write out input / create output files
		fileIO.writeFile('plain.tmp', plaintext)
		fileIO.writeFile('key.tmp', "")
		# run openssl hash command
		retval = subprocess.call(['openssl', 'dgst', '-sha256', outputType, '-out', 'key.tmp', 'plain.tmp'])
		# read in the output
		hashKey = fileIO.readFile('key.tmp')
	finally:
		# delete temp files
		fileIO.removeFile('plain.tmp')
		fileIO.removeFile('key.tmp')
		# return the output
		if hashKey is None or retval != 0:
			raise Exception("hash failed")
		else:
			return hashKey.replace('SHA256(plain.tmp)= ', '', 1)
Exemplo n.º 6
0
def encrypt(key, plaintext):
    ciphertext = None
    retval = 0
    try:
        # write out input / create output files
        fileIO.writeFile('key.tmp', key)
        fileIO.writeFile('plain.tmp', plaintext)
        fileIO.writeFile('cipher.tmp', "")
        # run openssl enc command
        with file('key.tmp') as f:
            retval = subprocess.call([
                'openssl', 'enc', '-aes-256-cbc', '-pass', 'stdin', '-out',
                'cipher.tmp', '-in', 'plain.tmp'
            ],
                                     stdin=f)
        # read in the output
        ciphertext = fileIO.readFile('cipher.tmp')
    finally:
        # delete temp files
        fileIO.removeFile('key.tmp')
        fileIO.removeFile('plain.tmp')
        fileIO.removeFile('cipher.tmp')
        # return the output
        if ciphertext is None or retval != 0:
            raise Exception("encrypt failed")
        else:
            return ciphertext
Exemplo n.º 7
0
def generatePassword():
	password = None
	retval = 0
	try: 
		# get the current time
		time = datetime.now().time()
		# write out input / create output files
		fileIO.writeFile('rand.tmp', "")
		# run openssl rand command
		retval = subprocess.call(['openssl', 'rand', '-hex', '-out', 'rand.tmp', '16'])
		# read in the output
		rand = fileIO.readFile('rand.tmp')
		# the password is actually the hash of the current time and random nonce value
		password = hash(str(time)+str(rand), '-hex')
	finally:
		# delete temp files
		fileIO.removeFile('rand.tmp')
		#return the output
		if password is None or retval != 0:
			raise Exception("generatePassword failed")
		else:
			return password
Exemplo n.º 8
0
def retrieveFile(peer_name, net):
	peer_info = net.getPeerInfo()
	client_common_name = peer_info[4][0][1]

	filename = net.recv()

	os.chdir('refmon')
	process = subprocess.Popen(['ocaml', 'RefMon.ml', peer_name, 'execute', client_common_name, 'get', filename], stdout=subprocess.PIPE)
	out, err = process.communicate()
	os.chdir('..')

	result = out.decode("utf-8")

	if(result == "Success"):
		file_contents = fileIO.readFile(tmp_file_dir + '/' + filename)
		net.send(file_contents)
	else:
		net.send(result)

	net.send(result)
	fileIO.removeFile(tmp_file_dir + '/' + filename)

	print('Retrieved', filename, 'for', client_common_name)
Exemplo n.º 9
0
def generatePassword():
    password = None
    retval = 0
    try:
        # get the current time
        time = datetime.now().time()
        # write out input / create output files
        fileIO.writeFile('rand.tmp', "")
        # run openssl rand command
        retval = subprocess.call(
            ['openssl', 'rand', '-hex', '-out', 'rand.tmp', '16'])
        # read in the output
        rand = fileIO.readFile('rand.tmp')
        # the password is actually the hash of the current time and random nonce value
        password = hash(str(time) + str(rand), '-hex')
    finally:
        # delete temp files
        fileIO.removeFile('rand.tmp')
        #return the output
        if password is None or retval != 0:
            raise Exception("generatePassword failed")
        else:
            return password
Exemplo n.º 10
0
def hash(plaintext, outputType):
    hashKey = None
    retval = 0
    try:
        # write out input / create output files
        fileIO.writeFile('plain.tmp', plaintext)
        fileIO.writeFile('key.tmp', "")
        # run openssl hash command
        retval = subprocess.call([
            'openssl', 'dgst', '-sha256', outputType, '-out', 'key.tmp',
            'plain.tmp'
        ])
        # read in the output
        hashKey = fileIO.readFile('key.tmp')
    finally:
        # delete temp files
        fileIO.removeFile('plain.tmp')
        fileIO.removeFile('key.tmp')
        # return the output
        if hashKey is None or retval != 0:
            raise Exception("hash failed")
        else:
            return hashKey.replace('SHA256(plain.tmp)= ', '', 1)
Exemplo n.º 11
0
def encrypt(key, plaintext):
	ciphertext = None
	retval = 0
	try:
		# write out input / create output files
		fileIO.writeFile('key.tmp', key)	
		fileIO.writeFile('plain.tmp', plaintext)
		fileIO.writeFile('cipher.tmp', "")
		# run openssl enc command
		with file('key.tmp') as f:
			retval = subprocess.call(['openssl', 'enc', '-aes-256-cbc', '-pass', 'stdin', '-out', 'cipher.tmp', '-in', 'plain.tmp'], stdin=f)
		# read in the output
		ciphertext = fileIO.readFile('cipher.tmp')
	finally:
		# delete temp files
		fileIO.removeFile('key.tmp')
		fileIO.removeFile('plain.tmp')
		fileIO.removeFile('cipher.tmp')
		# return the output
		if ciphertext is None or retval != 0:
			raise Exception("encrypt failed")
		else:
			return ciphertext