def handle(self):
global email
global password
conn = challenge34_shared.Conn(self)
print('S: reading email...')
readEmail = conn.readline()
print('S: reading A...')
A = conn.readnum()
print('S: writing salt...')
conn.writenum(salt)
b = random.randint(0, N)
B = (pow(g, b, N) + k*v) % N
print('S: writing B...')
conn.writenum(B)
u = challenge36_util.hashToInt(str(A) + str(B))
S = pow(pow(v, u, N) * A, b, N)
K = challenge36_util.hashToBytes(str(S))
server_hmac = challenge36_util.hmac(salt, K)
print('S: reading hmac...')
client_hmac = conn.readbytes()
if client_hmac == server_hmac:
print('S: writing success...')
conn.writeline(b'OK')
else:
conn.writeline(b'NOT OK')
def handle(self):
global email
global password
util = challenge34_util.Util(self)
print('S: reading email...')
readEmail = util.readline()
print('S: reading A...')
A = util.readnum()
print('S: writing salt...')
util.writenum(salt)
b = random.randint(0, N)
B = (pow(g, b, N) + k*v) % N
print('S: writing B...')
util.writenum(B)
u = challenge36_util.hashToInt(str(A) + str(B))
S = pow(pow(v, u, N) * A, b, N)
K = challenge36_util.hashToBytes(str(S))
server_hmac = challenge36_util.hmac(salt, K)
print('S: reading hmac...')
client_hmac = util.readbytes()
if client_hmac == server_hmac:
print('S: writing success...')
util.writeline(b'OK')
else:
util.writeline(b'NOT OK')
def handle(self):
global email
global password
util = challenge34_util.Util(self)
print('S: reading email...')
readEmail = util.readline()
print('S: reading A...')
A = util.readnum()
print('S: writing salt...')
util.writenum(salt)
b = random.randint(0, N)
B = pow(g, b, N)
print('S: writing B...')
util.writenum(B)
u = random.getrandbits(128)
print('S: writing u...')
util.writenum(u)
S = pow(pow(v, u, N) * A, b, N)
K = challenge36_util.hashToBytes(str(S))
server_hmac = challenge36_util.hmac(salt, K)
print('S: reading hmac...')
client_hmac = util.readbytes()
if client_hmac == server_hmac:
print('S: writing success...')
util.writeline(b'OK')
else:
util.writeline(b'NOT OK')
sock.connect((host, port))
util = challenge34_util.Util(sock)
print('C: writing email...')
util.writeline(email.encode('ascii'))
A = m*N
print('C: writing A...')
util.writenum(A)
print('C: reading salt...')
salt = util.readnum()
print('C: reading B...')
B = util.readnum()
S = 0
K = challenge36_util.hashToBytes(str(S))
client_hmac = challenge36_util.hmac(salt, K)
print('C: writing hmac...')
util.writebytes(client_hmac)
print('C: reading result...')
result = util.readline()
print('result:', result)
finally:
sock.close()
util.writeline(email.encode('ascii'))
print('C: writing A...')
util.writenum(A)
print('C: reading salt...')
salt = util.readnum()
print('C: reading B...')
B = util.readnum()
print('C: reading u...')
u = util.readnum()
x = challenge36_util.hashToInt(str(salt) + password)
S = pow(B, a + u * x, N)
K = challenge36_util.hashToBytes(str(S))
client_hmac = challenge36_util.hmac(salt, K)
print('C: writing hmac...')
util.writebytes(client_hmac)
print('C: reading result...')
result = util.readline()
print('result:', result)
finally:
sock.close()
