def request_send(sock,path=None,exactsize=None):
if not exactsize:
print "Requesting to send", path
length = ceil(os.stat(path).st_size,16)*16 + 256 #now length is a generous estimate of ciphertext filesize
message = makeheader(3,length)
sock.send(message) #send request has no body
else:
print "Requesting to send", exactsize, "bytes"
sock.send(makeheader(3,exactsize))
reply = sock.recv(1)
if ord(reply) != 1:
print "Upload request denied. Sorry."
return False
return True
def upload(socket, data):
""" Sends a large string data to the server, using sha to ensure integrity """
cursor = 0
while cursor < len(data):
if len(data) - cursor >= 256:
block = data[cursor : cursor + 256]
else:
block = data[cursor:]
socket.send(block)
socket.send(sha(block))
cursor += 256
# wait for acknowledgement from server
resend = ""
while True:
resend += socket.recv(1)
if resend[-1] == chr(255):
resend = [int(i) for i in resend.split(chr(0))[:-1]]
break
for i in resend:
# resend corrupted blocks
# print "resending block", i
socket.send(makeheader(4, min(256, len(data) - i)))
upload(data[i : min(i + 256, len(data))])
return len(resend)
def remote_create(sock,path):
if os.path.isfile(path):
if request_send(sock,path):
send_file(sock,path)
else:
#user made a folder
message = makeheader(2,getrel(path))
sock.send(message)
def send_file(sock, path):
fin = open(repopath(sock) + "\\" + path, "rb")
data = fin.read()
exactlength = len(data) + ceil(len(data), 256) * 64
# length of file + number of hashes * 64 bytes per hash
# SEND HEAD
message = makeheader(4, path, exactlength)
sock.send(message)
# SEND BODY
r = upload(sock, data)
sock.send(sha(data)[:8])
def relay(sock, command, args):
if command == 2:
# a folder was made
message = makeheader(2, args[0])
sock.send(message)
if command == 4:
# a file was added to a folder; now add it to yours
if request_send(sock, exactsize=int(args[1]) + 256):
send_file(sock, args[0])
elif command == 5:
# a file was deleted from a folder; now delete it from yours
message = makeheader(5, args[0])
sock.send(message)
elif command == 6:
# a file was moved in a folder; now move it in yours
message = makeheader(6, args[0], args[1])
sock.send(message)
elif command == 7:
# a file was renamed in a folder; now rename it in yours
message = makeheader(7, args[0], args[1])
sock.send(message)
def send_file(sock,path):
cipher = []
print "Encrypting..."
cipher = easyaes.encrypt(g.password,path=path) #easyaes needs your password to make an IV)
print "Done"
print list(sha(cipher)[:8])
exactlength = len(cipher)+ceil(len(cipher),256)*64
# length of file + number of hashes * 64 bytes per hash
# SEND HEAD
message = makeheader(4,getrel(path),exactlength)
sock.send(message)
# SEND BODY
r = upload(sock,cipher)
print "File sent,", r, "blocks resent"
def remote_rename(sock,pathold,pathnew):
message = makeheader(7,pathold,pathnew)
sock.send(message)
def remote_move(sock,pathold,pathnew):
message = makeheader(6,pathold,pathnew)
sock.send(message)
def remote_delete(sock,path):
message = makeheader(5,getrel(path))
sock.send(message)
