def removeData(self, username, signature, key):
""" Remove a block of data from user
Requires signature of key
Returns True if success, False otherwise
"""
if not checkSignature(username, signature, key):
return False
Isis.removeKey("data/%s/%s" % (username, key))
return True
def registerKey(self, username, signature, privatekey):
""" Register a private key with a user
Requires signature of privatekey
Returns True if success, False otherwise
"""
if not checkSignature(username, signature, privatekey):
print "invalid signature"
return False
Isis.putKey(("keys/%s" % username), privatekey)
return True
def updateFile(self, username, signature, data):
""" Update file list of user
Requires signature of data
Data should be encrypted
Returns True if success, False otherwise
"""
if not checkSignature(username, signature, data):
return False
Isis.putKey(("files/%s" % username), data)
return True
def addData(self, username, signature, key, data):
""" Add a block of data to a user
Requires signature of key
Key should be unique reference for block (sha1 hash)
Data should be encrypted
Returns True if success, False otherwise
"""
if not checkSignature(username, signature, key):
return False
Isis.putKey(("data/%s/%s" % (username, key)), data)
return True
def registerUser(self, username, publickey):
""" Register a username and publickey.
Returns True if success, False otherwise
"""
if username and publickey:
return Isis.registerUser(username, publickey)
else:
return False
def getData(self, username, signature, key):
""" Get a block of data from user
Requires signature of key
Returns data if success, False otherwise
"""
if not checkSignature(username, signature, key):
return False
return Isis.getKey("data/%s/%s" % (username, key))
def getUser(self, username):
""" Get public key of user
Returns publickey
"""
key = Isis.getUserKey(username)
if key:
return key
else:
return False
def poll(self, username):
""" Get file list of user
Returns filelist (encrypted) if success, False otherwise
"""
return Isis.getKey("files/%s" % username)
def getKey(self, username):
""" Get the (encrypted) private key of the user
Returns privatekey
"""
return Isis.getKey("keys/%s" % username)
def checkSignature(username, signature, data):
publickey = Isis.getUserKey(username)
instance = RSA.importKey(publickey)
hash = SHA.new(data).digest()
return instance.verify(hash, (bytes_to_long(signature),))
