#client side code
import sha1code #import the code for sha1 algorithm
import socket
clientsocket = socket.socket(
socket.AF_INET,
socket.SOCK_STREAM) #create a unix domain, stream type client side socket
#get hostname of local machine
#host = socket.gethostname()
host = '127.0.0.1' #localhost
#assign port no.
port = 12345
clientsocket.connect((host, port)) #connect to localhost,port no.
clientsocket.send("thisisaplaintext") # send message to be encrypted to server
message_from_server = clientsocket.recv(1024) #get message digest from server
message_digest = sha1code.sha1(
"thisisaplaintext") #compute message digest locally
if (message_digest == message_from_server):
print("success")
else:
print("failure")
#server side code
import socket
import sha1code
#create a server side socket object
serversocket =socket.socket(socket.AF_INET,socket.SOCK_STREAM) #create a unix domain stream socket
#get the hostname of local machine
hostname= '127.0.0.1'
print hostname
port = 12345 #port to which server will be listening
#bind the socket to port
serversocket.bind((hostname, port)) #bind serverside socket to host and port
#set max no. of connections to listen
serversocket.listen(10)
while True:
#establish a connection by accepting connection from client
clientsocket,addr =serversocket.accept() #clientsocket is socket connected with client , addr corresponds to address of client
print("successfully accepted connection from %s" % str(addr)) #print address of client from whom connection is recieved
#receive 1024 bytes of message from client
plain_text =clientsocket.recv(1024)
message_digest=sha1code.sha1(plain_text) #get message digest from sha1 algorithm
clientsocket.send(message_digest) #send back message digest
clientsocket.close() #close client side socket
#client side code
import sha1code #import the code for sha1 algorithm
import socket
clientsocket = socket.socket(
socket.AF_INET,
socket.SOCK_STREAM) #create a unix domain, stream type client side socket
#get hostname of local machine
#host = socket.gethostname()
host = 'localhost' #localhost
#assign port no.
port = 12345
clientsocket.connect((host, port)) #connect to localhost,port no.
msg = raw_input("Enter message: ")
message_digest = sha1code.sha1(msg)
print "Message Digest Initial: ", message_digest
clientsocket.send(msg) # send message to be encrypted to server
message_from_server = clientsocket.recv(1024) #get message digest from server
#compute message digest locally
newmd = sha1code.sha1(message_from_server)
print "Message Digest Final: ", newmd
if (message_digest == newmd):
print("success")
else:
print("failure")