def encryptMessageToSendRSA(params):
with open("PublicKey", "rb") as f:
serverPublicKey = security.importkey_RSA(f.read())
tf = tempfile.NamedTemporaryFile(delete=True)
security.encrypt_RSA(serverPublicKey, json.dumps(params), tf)
sendparam = {"data": tf.read().encode("hex")}
return sendparam
def logInUser(self, **kwargs):
"""Server Side logIn User
User sends his username (Unique Identifier) and his password
Security: Message from user ciphered with Server Public Key
Session Management: Create a Public Key with DiffieHellman"""
# Decipher the Message with Server Private Key
receivedData = dm.decryptMessageReceived(kwargs['data'].decode('hex'))
print receivedData['userID']
# Verify if the user exists and has finished the regist process
if DBmodule.db_registAuthenticate(receivedData['userID']) and \
DBmodule.db_getLogIn(receivedData['userID'], receivedData['password']) == 1:
# Create Session
print receivedData['userID']
print receivedData['password']
serverSession = DiffieHellman.DiffieHellman()
# Create challenge
token = os.urandom(20)
um.addSession(receivedData['userID'], serverSession, token)
# Send to client the Token and the session public key
tf = tempfile.NamedTemporaryFile(delete=True)
pub_key = DBmodule.db_getUserPubKey(
DBmodule.db_getUserID(receivedData['userID'])).decode('hex')
security.encrypt_RSA(security.importkey_RSA(pub_key), token, tf)
messageToSend = {
'token': tf.read().encode('hex'),
'session': serverSession.publicKey
}
return json.dumps(messageToSend)
elif DBmodule.db_registNotAuthenticate(receivedData['userID']):
return "REGIST_AGAIN"
else:
return "ERROR"
def encryptMessageToSendRSA(params):
with open('PublicKey', 'rb') as f:
serverPublicKey = security.importkey_RSA(f.read())
tf = tempfile.NamedTemporaryFile(delete=True)
security.encrypt_RSA(serverPublicKey, json.dumps(params), tf)
sendparam = {'data': tf.read().encode('hex')}
return sendparam
def shareFile(user, filename, usr_dest, permission):
"""Share function, allows a file to be shared
with another user. The file with the AES used to encrypt
the file to be shared is sent from the server, it is
decrypted and encrypted with the target user's public key
Security:
- Sharing user's private key is used for decrypting
file with AES key
- Target user's public key is used for encrypting
file with AES key
- Sharing client receives no information from the
other user except username and public key
- All relevant information is kept client-side"""
(username, session) = user.getInfo()
message = {
'filename': filename,
'usrdstname': usr_dest,
}
messageToSend = security.encryptS_AES(json.dumps(message),
session.decode('hex')).encode('hex')
params = {'data': messageToSend, 'username': username}
datagen, headers = multipart_encode(params)
try:
resp = urllib2.Request('https://localhost:8080/share', datagen,
headers)
data = urllib2.urlopen(resp)
date = json.loads(
security.decryptS_AES(data.info().getheader('data').decode('hex'),
session.decode('hex')))
aes = date['aes'].decode('hex')
pub_key = date['pubkey'].decode('hex')
with open('PrivateKeys/Private_key_' + str(username), 'rb') as f:
priv = security.importkey_RSA(f.read())
RsaAES = security.decrypt_RSA(priv, aes)
tf = tempfile.NamedTemporaryFile(delete=True)
security.encrypt_RSA(security.importkey_RSA(pub_key), RsaAES, tf)
message = {
'filename': filename,
'usrdstname': usr_dest,
'filekey': tf.read().encode('hex'),
'permission': permission
}
messageToSend = security.encryptS_AES(
json.dumps(message), session.decode('hex')).encode('hex')
request = urllib2.Request('https://localhost:8080/shareFile')
request.add_header('username', username)
request.add_header('data', messageToSend)
response = urllib2.urlopen(request)
tf.close()
print response.read()
except urllib2.HTTPError as e:
print str(e.code) + ': ' + e.reason
print 'Currently, you are not a valid user!\nSafeBox Team'
def shareFile(user, filename, usr_dest, permission):
"""Share function, allows a file to be shared
with another user. The file with the AES used to encrypt
the file to be shared is sent from the server, it is
decrypted and encrypted with the target user's public key
Security:
- Sharing user's private key is used for decrypting
file with AES key
- Target user's public key is used for encrypting
file with AES key
- Sharing client receives no information from the
other user except username and public key
- All relevant information is kept client-side"""
(username, session) = user.getInfo()
message = {"filename": filename, "usrdstname": usr_dest}
messageToSend = security.encryptS_AES(json.dumps(message), session.decode("hex")).encode("hex")
params = {"data": messageToSend, "username": username}
datagen, headers = multipart_encode(params)
try:
resp = urllib2.Request("https://localhost:8080/share", datagen, headers)
data = urllib2.urlopen(resp)
date = json.loads(security.decryptS_AES(data.info().getheader("data").decode("hex"), session.decode("hex")))
aes = date["aes"].decode("hex")
pub_key = date["pubkey"].decode("hex")
with open("PrivateKeys/Private_key_" + str(username), "rb") as f:
priv = security.importkey_RSA(f.read())
RsaAES = security.decrypt_RSA(priv, aes)
tf = tempfile.NamedTemporaryFile(delete=True)
security.encrypt_RSA(security.importkey_RSA(pub_key), RsaAES, tf)
message = {
"filename": filename,
"usrdstname": usr_dest,
"filekey": tf.read().encode("hex"),
"permission": permission,
}
messageToSend = security.encryptS_AES(json.dumps(message), session.decode("hex")).encode("hex")
request = urllib2.Request("https://localhost:8080/shareFile")
request.add_header("username", username)
request.add_header("data", messageToSend)
response = urllib2.urlopen(request)
tf.close()
print response.read()
except urllib2.HTTPError as e:
print str(e.code) + ": " + e.reason
print "Currently, you are not a valid user!\nSafeBox Team"
def registUser(self, **kwargs):
"""Server Side Regist User
User sends his username (Unique Identifier) and his Smart Card
Public Key information (MOD and EXP).
Security: Message from user ciphered with Server Public Key"""
# Decipher the Message with Server Private Key
receivedData = dm.decryptMessageReceived(kwargs['data'].decode('hex'))
# Verify if the user exists or has not finished the regist process
if not DBmodule.db_existingUserBI(receivedData['userID']) or \
DBmodule.db_registNotAuthenticate(receivedData['userID']):
# Save User Public Key in a File
destination = os.path.join('publicKey',
str(receivedData['userID']) + '.pub')
with open(destination, 'wb') as f:
f.write("%s:%s" % (str(kwargs['exp']), str(kwargs['mod'])))
# Update DB
if not DBmodule.db_existingUserBI(receivedData['userID']):
DBmodule.db_addNewUser(receivedData['username'],
receivedData['userID'],
pw.make_hash(receivedData['password']),
kwargs['pub_key'])
else:
DBmodule.db_UserInfoUpdate(
receivedData['username'], receivedData['userID'],
pw.make_hash(receivedData['password']), kwargs['pub_key'])
# Ask PAM what it needs to validate the user identity
""" ----------------- PAM -------------------- """
token = os.urandom(20)
um.addRegist(receivedData['userID'], token)
""" ----------------- PAM -------------------- """
# Send to client the Token encrypted by User Public Key
tf = tempfile.NamedTemporaryFile(delete=True)
security.encrypt_RSA(
security.importkey_RSA(kwargs['pub_key'].decode('hex')), token,
tf)
return tf.read().encode('hex')
else:
return "ERROR"
def upload(fp, user):
"""Upload function, creates a temporary file to which
the data of the user file is encrypted to. That temp file
is then read by chunks and sent to the CherryPy server
Security:
- Authentication
- File is encrypt with AES
- hasher is created for File Integrity Control
- Public key is accessed for creating a signature
- Private Key is accessed for encrypting the AES
key
- All relevant information is kept client-side"""
(username, session) = user.getInfo()
tf = tempfile.NamedTemporaryFile(delete=False)
filesize = os.stat(fp).st_size
hasher = security.Hasher()
pu_key = getPubKey(username)
enc, iv, aes = security.getCipher(security.importkey_RSA(pu_key))
with open("PrivateKeys/Private_key_" + str(username), "rb") as f:
priv = security.importkey_RSA(f.read())
security.encrypt_AES(open(fp, "rb"), tf, enc, hasher, filesize)
h = hasher.get()
signature = security.signFile(priv, h)
tf.close()
f = FileLenIO(tf.name, "rb")
list_pu_key = getUsersPubkey(fp.split("/")[-1], username)
message = {"filename": fp.split("/")[-1], "iv": iv, "sign": signature.encode("hex")}
messageToSend = security.encryptS_AES(json.dumps(message), session.decode("hex")).encode("hex")
# New File
if list_pu_key == []:
try:
request = urllib2.Request("https://localhost:8080/upload", f)
request.add_header("Content-Type", "application/octet-stream")
request.add_header("username", username)
request.add_header("aes", aes)
request.add_header("data", messageToSend)
request.add_header("Content-Length", os.stat(tf.name).st_size)
response = urllib2.urlopen(request)
except urllib2.URLError as e:
print e.reason
print "Currently, you are not a valid user!\nSafeBox Team"
# New File Version
else:
RsaAES = security.decrypt_RSA(priv, aes.decode("hex"))
fileList = []
for publickey in list_pu_key:
tf2 = tempfile.NamedTemporaryFile(delete=True)
security.encrypt_RSA(security.importkey_RSA(publickey.decode("hex")), RsaAES, tf2)
fileList += [tf2.read().encode("hex")]
try:
request = urllib2.Request("https://localhost:8080/uploadExistingFile", f)
request.add_header("Content-Type", "application/octet-stream")
request.add_header("username", username)
request.add_header("aes", json.dumps(fileList))
request.add_header("data", messageToSend)
request.add_header("Content-Length", os.stat(tf.name).st_size)
response = urllib2.urlopen(request)
except urllib2.URLError as e:
print e.reason
print "Currently, you are not a valid user!\nSafeBox Team"
os.remove(tf.name)
def upload(fp, user):
"""Upload function, creates a temporary file to which
the data of the user file is encrypted to. That temp file
is then read by chunks and sent to the CherryPy server
Security:
- Authentication
- File is encrypt with AES
- hasher is created for File Integrity Control
- Public key is accessed for creating a signature
- Private Key is accessed for encrypting the AES
key
- All relevant information is kept client-side"""
(username, session) = user.getInfo()
tf = tempfile.NamedTemporaryFile(delete=False)
filesize = os.stat(fp).st_size
hasher = security.Hasher()
pu_key = getPubKey(username)
enc, iv, aes = security.getCipher(security.importkey_RSA(pu_key))
with open('PrivateKeys/Private_key_' + str(username), 'rb') as f:
priv = security.importkey_RSA(f.read())
security.encrypt_AES(open(fp, 'rb'), tf, enc, hasher, filesize)
h = hasher.get()
signature = security.signFile(priv, h)
tf.close()
f = FileLenIO(tf.name, 'rb')
list_pu_key = getUsersPubkey(fp.split('/')[-1], username)
message = {
'filename': fp.split('/')[-1],
'iv': iv,
'sign': signature.encode('hex')
}
messageToSend = security.encryptS_AES(json.dumps(message),
session.decode('hex')).encode('hex')
# New File
if list_pu_key == []:
try:
request = urllib2.Request('https://localhost:8080/upload', f)
request.add_header('Content-Type', 'application/octet-stream')
request.add_header('username', username)
request.add_header('aes', aes)
request.add_header('data', messageToSend)
request.add_header('Content-Length', os.stat(tf.name).st_size)
response = urllib2.urlopen(request)
except urllib2.URLError as e:
print e.reason
print 'Currently, you are not a valid user!\nSafeBox Team'
# New File Version
else:
RsaAES = security.decrypt_RSA(priv, aes.decode('hex'))
fileList = []
for publickey in list_pu_key:
tf2 = tempfile.NamedTemporaryFile(delete=True)
security.encrypt_RSA(
security.importkey_RSA(publickey.decode('hex')), RsaAES, tf2)
fileList += [tf2.read().encode('hex')]
try:
request = urllib2.Request(
'https://localhost:8080/uploadExistingFile', f)
request.add_header('Content-Type', 'application/octet-stream')
request.add_header('username', username)
request.add_header('aes', json.dumps(fileList))
request.add_header('data', messageToSend)
request.add_header('Content-Length', os.stat(tf.name).st_size)
response = urllib2.urlopen(request)
except urllib2.URLError as e:
print e.reason
print 'Currently, you are not a valid user!\nSafeBox Team'
os.remove(tf.name)
