def doauth(self,serverid): conn = secureconnection(authhost,authport) conn.sendmsg(self.username, self.password,'HEAD', '/', str(serverid)+"\r\nnokey") token = conn.recvmsg() conn.close() ticket, sessionkey, c = self.decrypttoken(token,password) return ticket, sessionkey
def __init__(self, authhost, authport):
username = '******'
password = '******'
self.numreplicas = 2 # number of replicas each file should have
#register with auth server
#generate key
key = RSA.generate(1024)
self.key = key.exportKey()
msg = str(key)+'\r\n'
#setup socket and get my port
self.s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
self.s.bind(('', 0))
self.port = self.s.getsockname()[1]
self.host = socket.getfqdn()
#formulate the registration request
request = self.host +'\r\n'+str(self.port)+'\r\n'+self.key
#send data
conn = secureconnection(authhost,authport)
conn.sendmsg(username, password,'GET', '/', '0'+"\r\n"+request)
token = conn.recvmsg()
conn.close()
#record assigned server id
self.serverid = self.decrypttoken(token,password)
print "my sid:", self.serverid
#start a thread to look out for dead servers
thread.start_new_thread(self.removedeadservers, ())
def write(self, filePath, contents): #get token from Auth server conn = secureconnection(self.ahost, self.aport) conn.sendmsg(self.user, self.passwd,'POST', filePath, "0\r\nnokey") resp = conn.recvmsg() conn.close() #check ok code , a, b, c = self.parsehttp(resp) if code == 302: #extract details from token ticket, sessionkey, serverid = self.decrypttoken(resp) #make request to dir server code, dhost, dport, fserverid = self.parsehttp(resp) conn2 = secureconnection(dhost, dport) conn2.sendmsg(self.user, self.passwd,'POST', filePath, ticket+"\r\nnokey") resp = conn2.recvmsg() conn2.close() #make request to file server code, fhost, fport, fserverid = self.parsehttp(resp) print 'code: ', code if code == 302: #Authorize request #get token from Auth server conn = secureconnection(self.ahost, self.aport) conn.sendmsg(self.user, self.passwd,'POST', filePath, fserverid+"\r\nnokey") token = conn.recvmsg() conn.close() #extract ticket ticket, sessionkey, serverid = self.decrypttoken(token) #Make request conn2 = secureconnection(fhost, fport) conn2.sendmsg(self.user, self.passwd,'POST', filePath, ticket+contents) resp = conn2.recvmsg() conn2.close() return (self.parsehttp(resp)[3])[:-2] else: return "http error:" + str(code)
def removedeadservers(self):
while True:
time.sleep(2)
servers = dirservice.allservers[1:]
for server in servers:
host, port = server[1].split(':')[:2]
# try:
conn2 = secureconnection(host, int(port))
conn2.sendmsg(self.user, self.passwd,'TEST', '#','none')
resp = conn2.recvmsg()
conn2.close()
def __init__(self, username, password, authhost, authport, rootdir):
#setup
#save some args
self.rootdir = rootdir
self.username = username
self.passwd = password
#setup socket and get my port
self.s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
self.s.bind(('', 0))
port = self.s.getsockname()[1]
host = socket.getfqdn()
self.host = host+':'+str(port)
#register with auth server
#generate key
key = RSA.generate(1024)
self.key = key.exportKey()
msg = str(key)+'\r\n'
#send data
conn = secureconnection(authhost,authport)
conn.sendmsg(username, password,'GET', '/', '0'+"\r\n"+self.key)
token = conn.recvmsg()
conn.close()
ticket, self.sessionkey, self.serverid = self.decrypttoken(token,password)
self.dirhost, self.dirport = self.getdirloc(token)
print "my sid:", self.serverid
#register with dirserver
request = self.host+'\r\n'+self.serverid+'\r\n'+str(self.getfolders())
conn = secureconnection(self.dirhost, int(self.dirport))
conn.sendmsg(username, password,'GET', '/', ticket+request)
token = conn.recvmsg()
conn.close()
def getpeers(self, path, ticket, sessionkey):
#make request
conn = secureconnection(self.dirhost, self.dirport)
conn.sendmsg(self.username, self.password,'HEAD', path , ticket)
resp = conn.recvmsg()
conn.close()
#extract data
headers = resp.split('\r\n\r\n')[0]
respline = headers.split('\r\n')[0]
code = int(respline.split(' ')[1]) # response code
body = resp.split('\r\n\r\n')[1]
#decript body
decryptor = ARC4.new(sessionkey)
body = (decryptor.decrypt(body))
return body
def writes(self, server, path, contents):
#get server details
fshost = server[0:server.index(':')]
fsport = int(server[server.index(':')+1:server.rfind(':')])
fssid = server[server.rfind(':')+1:]
#quit if for this server
if fssid == self.getid():
pass
else:
print 'writing to a replica of', path, 'sid: ', fssid
#get token from Auth server
ticket, sessionkey = self.doauth(fssid)
#make request to file server
conn2 = secureconnection(fshost, fsport)
conn2.sendmsg(self.username, self.password,'POST', path, ticket+contents)
resp = conn2.recvmsg()
conn2.close()
