def sign_string(self, string_to_sign):
if self._hmac_256:
hmac = self._hmac_256.copy()
else:
hmac = self._hmac.copy()
hmac.update(string_to_sign)
return base64.encodestring(hmac.digest()).strip()
def _mac(self, fh):
hmac = self.hmac.copy()
d = self._read(fh, BUFFER_SIZE, 0)
while d:
hmac.update(d)
d = self._read(fh, BUFFER_SIZE)
return hmac.digest()[:MAC_SIZE]
def calc_signature_2(self, params, verb, path):
boto.log.debug('using calc_signature_2')
string_to_sign = '%s\n%s\n%s\n' % (verb, self.server_name().lower(),
path)
if self.hmac_256:
hmac = self.hmac_256.copy()
params['SignatureMethod'] = 'HmacSHA256'
else:
hmac = self.hmac.copy()
params['SignatureMethod'] = 'HmacSHA1'
keys = params.keys()
keys.sort()
pairs = []
for key in keys:
val = self.get_utf8_value(params[key])
pairs.append(
urllib.quote(key, safe='') + '=' +
urllib.quote(val, safe='-_~'))
qs = '&'.join(pairs)
boto.log.debug('query string: %s' % qs)
string_to_sign += qs
boto.log.debug('string_to_sign: %s' % string_to_sign)
hmac.update(string_to_sign)
b64 = base64.b64encode(hmac.digest())
boto.log.debug('len(b64)=%d' % len(b64))
boto.log.debug('base64 encoded digest: %s' % b64)
return (qs, b64)
def _calc_signature(self, params, verb, path, server_name):
boto.log.debug('using _calc_signature_2')
string_to_sign = '%s\n%s\n%s\n' % (verb, server_name.lower(), path)
if self._hmac_256:
hmac = self._hmac_256.copy()
params['SignatureMethod'] = 'HmacSHA256'
else:
hmac = self._hmac.copy()
params['SignatureMethod'] = 'HmacSHA1'
keys = params.keys()
keys.sort()
pairs = []
for key in keys:
val = boto.utils.get_utf8_value(params[key])
pairs.append(urllib.quote(key, safe='') + '=' +
urllib.quote(val, safe='-_~'))
qs = '&'.join(pairs)
boto.log.debug('query string: %s' % qs)
string_to_sign += qs
boto.log.debug('string_to_sign: %s' % string_to_sign)
hmac.update(string_to_sign)
b64 = base64.b64encode(hmac.digest())
boto.log.debug('len(b64)=%d' % len(b64))
boto.log.debug('base64 encoded digest: %s' % b64)
return (qs, b64)
def _calc_signature(self, params, verb, path, server_name):
boto.log.debug("using _calc_signature_2")
string_to_sign = "%s\n%s\n%s\n" % (verb, server_name.lower(), path)
if self._hmac_256:
hmac = self._hmac_256.copy()
params["SignatureMethod"] = "HmacSHA256"
else:
hmac = self._hmac.copy()
params["SignatureMethod"] = "HmacSHA1"
if self._provider.security_token:
params["SecurityToken"] = self._provider.security_token
keys = params.keys()
keys.sort()
pairs = []
for key in keys:
val = boto.utils.get_utf8_value(params[key])
pairs.append(urllib.quote(key, safe="") + "=" + urllib.quote(val, safe="-_~"))
qs = "&".join(pairs)
boto.log.debug("query string: %s" % qs)
string_to_sign += qs
boto.log.debug("string_to_sign: %s" % string_to_sign)
hmac.update(string_to_sign)
b64 = base64.b64encode(hmac.digest())
boto.log.debug("len(b64)=%d" % len(b64))
boto.log.debug("base64 encoded digest: %s" % b64)
return (qs, b64)
def sign_string(self, string_to_sign):
if self._hmac_256:
hmac = self._hmac_256.copy()
else:
hmac = self._hmac.copy()
hmac.update(string_to_sign)
return base64.encodestring(hmac.digest()).strip()
def _mac(self, fh, h):
pos, hmac = MAC_SIZE, self.hmac.copy()
d = self._read(fh, BUFFER_SIZE, pos)
while d:
hmac.update(self._dec(h, pos, d))
pos, d = pos + len(d), self._read(fh, BUFFER_SIZE)
return hmac.digest()[:MAC_SIZE]
def sign_string(self, string_to_sign):
boto.log.debug('Canonical: %s' % string_to_sign)
if self._hmac_256:
hmac = self._hmac_256.copy()
else:
hmac = self._hmac.copy()
hmac.update(string_to_sign)
return base64.encodestring(hmac.digest()).strip()
def sign_string(self, string_to_sign):
boto.log.debug('Canonical: %s' % string_to_sign)
if self._hmac_256:
hmac = self._hmac_256.copy()
else:
hmac = self._hmac.copy()
hmac.update(string_to_sign)
return base64.encodestring(hmac.digest()).strip()
def request_new_test(self, duration, interval, hmac_hex, raw_data=False):
"""Request a new test instance.
This will allocate a new ITGRecv instance and parse the log file it
produces. The results of this can then be retrieved with
get_test_results() after the test has run.
The parameters are:
duration: Requested test duration in seconds. The ITGRecv instance will
be killed after this time has passed (+ a grace period of five
seconds).
interval: The requested interval for data points, in milliseconds
(passed to ITGDec).
hmac_hex: A hexadecimal HMAC-SHA256 of the two other parameters computed
by concatenating their ASCII representations. The HMAC secret
is configured by the operator of the control server instance.
raw_data: Whether to store and return the raw text log from ITGDec (i.e.
the output of ITGDec -l)
The return value is a dictionary with the following keys:
status: 'OK' if everything went well, 'Error' otherwise.
message: Set if status is 'Error'; contains an error message.
test_id: The assigned test ID, to be passed to get_test_results() after
the duration has expired.
port: The control server port of the ITGRecv instance. The sender is
expected to use port+1 for the data connection.
"""
self._collect_garbage()
duration = int(duration)
interval = int(interval)
hmac = self.hmac.copy()
hmac.update(str(duration).encode())
hmac.update(str(interval).encode())
if hmac.hexdigest() != hmac_hex:
return {"status": "Error", "message": "HMAC authentication failure."}
if duration <= 0 or interval <= 0:
return {"status": "Error", "message": "Duration and interval must be positive integers."}
if duration > self.max_test_time:
return {"status": "Error", "message": "Maximum test time of %d seconds exceeded." % self.max_test_time}
if interval > duration * 1000:
return {"status": "Error", "message": "Interval must be <= duration."}
if len(self.children) >= self.max_instances:
return {"status": "Error", "message": "Too many concurrent instances running. " "Try again later."}
test_id = "".join(random.sample(ALPHABET, self.id_length))
# Need one port for control, one for data (if the data stream is TCP).
port = self.current_port
self.current_port += 2
return self._spawn_receiver(test_id, duration, interval, port, raw_data)
def add_aws_auth_header(self, headers, method, path):
if not headers.has_key('Date'):
headers['Date'] = time.strftime("%a, %d %b %Y %H:%M:%S GMT",
time.gmtime())
c_string = boto.utils.canonical_string(method, path, headers)
boto.log.debug('Canonical: %s' % c_string)
hmac = self.hmac.copy()
hmac.update(c_string)
b64_hmac = base64.encodestring(hmac.digest()).strip()
headers['Authorization'] = "AWS %s:%s" % (self.aws_access_key_id, b64_hmac)
def add_aws_auth_header(self, headers, method, path):
if not headers.has_key('Date'):
headers['Date'] = time.strftime("%a, %d %b %Y %H:%M:%S GMT",
time.gmtime())
c_string = boto.utils.canonical_string(method, path, headers)
boto.log.debug('Canonical: %s' % c_string)
hmac = self.hmac.copy()
hmac.update(c_string)
b64_hmac = base64.encodestring(hmac.digest()).strip()
headers['Authorization'] = "AWS %s:%s" % (self.aws_access_key_id,
b64_hmac)
def add_aws_auth_header(self, headers, method, path):
path = self.get_path(path)
if not headers.has_key("Date"):
headers["Date"] = time.strftime("%a, %d %b %Y %H:%M:%S GMT", time.gmtime())
c_string = boto.utils.canonical_string(method, path, headers, None, self.provider)
boto.log.debug("Canonical: %s" % c_string)
hmac = self.hmac.copy()
hmac.update(c_string)
b64_hmac = base64.encodestring(hmac.digest()).strip()
auth_hdr = self.provider.auth_header
headers["Authorization"] = "%s %s:%s" % (auth_hdr, self.aws_access_key_id, b64_hmac)
def getSignedUrl(base_url, params, timestamp=None):
global HMAC
hmac = HMAC.copy()
# Add a ISO 8601 compliant timestamp (in GMT)
if timestamp:
params["Timestamp"] = timestamp
else:
params["Timestamp"] = time.strftime("%Y-%m-%dT%H:%M:%S", time.gmtime())
# params['SignatureVersion']='1'
# Sort the URL parameters by key
keys = params.keys()
# keys.sort(cmp = lambda x, y: cmp(x.lower(), y.lower()))
keys.sort()
# Reconstruct the URL parameters and encode them
pairs = []
for key in keys:
# val = urllib.quote(params[key])
val = params[key]
pairs.append(key + "=" + val)
url_string = "&".join(pairs)
url_string = url_string.replace("+", "%20")
url_string = url_string.replace(":", "%3A")
# Construct the string to sign
urlparts = base_url.split("/")
string_to_sign = """GET
%s
/%s/%s
%s""" % (
urlparts[2],
urlparts[3],
urlparts[4],
url_string,
)
url_string = url_string.replace(";", urllib.quote(";"))
# Sign the request
hmac.update(string_to_sign)
signature = hmac.digest()
# Base64 encode the signature
signature = base64.encodestring(signature).strip()
signature = signature.replace("+", "%2B")
signature = signature.replace("=", "%3D")
signature = signature.replace("/", "%2F")
# Make the signature URL safe
url_string += "&Signature=%s" % signature
return "%s?%s" % (base_url, url_string)
def calc_signature_1(self, params):
boto.log.debug("using calc_signature_1")
hmac = self.hmac.copy()
keys = params.keys()
keys.sort(cmp=lambda x, y: cmp(x.lower(), y.lower()))
pairs = []
for key in keys:
hmac.update(key)
val = self.get_utf8_value(params[key])
hmac.update(val)
pairs.append(key + "=" + urllib.quote(val))
qs = "&".join(pairs)
return (qs, base64.b64encode(hmac.digest()))
def _calc_signature(self, params, *args):
boto.log.debug('using _calc_signature_1')
hmac = self._get_hmac()
keys = params.keys()
keys.sort(cmp=lambda x, y: cmp(x.lower(), y.lower()))
pairs = []
for key in keys:
hmac.update(key.encode('utf-8'))
val = boto.utils.get_utf8_value(params[key])
hmac.update(val)
pairs.append(key + '=' + urllib.parse.quote(val))
qs = '&'.join(pairs)
return (qs, base64.b64encode(hmac.digest()))
def _calc_signature(self, params, *args):
boto.log.debug('using _calc_signature_0')
hmac = self._get_hmac()
s = params['Action'] + params['Timestamp']
hmac.update(s.encode('utf-8'))
keys = params.keys()
keys.sort(cmp=lambda x, y: cmp(x.lower(), y.lower()))
pairs = []
for key in keys:
val = get_utf8able_str(params[key])
pairs.append(key + '=' + urllib.parse.quote(val))
qs = '&'.join(pairs)
return (qs, base64.b64encode(hmac.digest()))
def calc_signature_1(self, params):
boto.log.debug('using calc_signature_1')
hmac = self.hmac.copy()
keys = params.keys()
keys.sort(cmp=lambda x, y: cmp(x.lower(), y.lower()))
pairs = []
for key in keys:
hmac.update(key)
val = self.get_utf8_value(params[key])
hmac.update(val)
pairs.append(key + '=' + urllib.quote(val))
qs = '&'.join(pairs)
return (qs, base64.b64encode(hmac.digest()))
def calc_signature_0(self, params):
boto.log.debug('using calc_signature_0')
hmac = self.hmac.copy()
s = params['Action'] + params['Timestamp']
hmac.update(s)
keys = params.keys()
keys.sort(cmp = lambda x, y: cmp(x.lower(), y.lower()))
pairs = []
for key in keys:
val = self.get_utf8_value(params[key])
pairs.append(key + '=' + urllib.quote(val))
qs = '&'.join(pairs)
return (qs, base64.b64encode(hmac.digest()))
def _calc_signature(self, params, *args):
boto.log.debug("using _calc_signature_0")
hmac = self._get_hmac()
s = params["Action"] + params["Timestamp"]
hmac.update(s)
keys = params.keys()
keys.sort(cmp=lambda x, y: cmp(x.lower(), y.lower()))
pairs = []
for key in keys:
val = boto.utils.get_utf8_value(params[key])
pairs.append(key + "=" + urllib.quote(val))
qs = "&".join(pairs)
return (qs, base64.b64encode(hmac.digest()))
def _calc_signature(self, params, *args):
boto.log.debug('using _calc_signature_1')
hmac = self._get_hmac()
keys = list(params.keys())
keys.sort(key=lambda x: x.lower())
pairs = []
for key in keys:
hmac.update(key.encode('utf-8'))
val = get_utf8able_str(params[key]).encode('utf-8')
hmac.update(val)
pairs.append(key + '=' + urllib.parse.quote(val))
qs = '&'.join(pairs)
return (qs, base64.b64encode(hmac.digest()))
def _calc_signature(self, params, *args):
boto.log.debug('using _calc_signature_0')
hmac = self._hmac.copy()
s = params['Action'] + params['Timestamp']
hmac.update(s)
keys = params.keys()
keys.sort(key=str.lower)
pairs = []
for key in keys:
val = boto.utils.get_utf8_value(params[key])
pairs.append(key + '=' + quote(val))
qs = '&'.join(pairs)
return (qs, base64.b64encode(hmac.digest()))
def _calc_signature(self, params, *args):
boto.log.debug('using _calc_signature_1')
hmac = self._hmac.copy()
keys = params.keys()
keys.sort(cmp = lambda x, y: cmp(x.lower(), y.lower()))
pairs = []
for key in keys:
hmac.update(key)
val = boto.utils.get_utf8_value(params[key])
hmac.update(val)
pairs.append(key + '=' + urllib.quote(val))
qs = '&'.join(pairs)
return (qs, base64.b64encode(hmac.digest()))
def _calc_signature(self, params, *args):
boto.log.debug('using _calc_signature_1')
hmac = self._get_hmac()
keys = list(params.keys())
keys.sort(key=lambda x: x.lower())
pairs = []
for key in keys:
hmac.update(key.encode('utf-8'))
val = boto.utils.get_utf8_value(params[key])
hmac.update(val)
pairs.append(key + '=' + urllib.parse.quote(val))
qs = '&'.join(pairs)
return (qs, base64.b64encode(hmac.digest()))
def _calc_signature(self, params, *args):
txboto.log.debug('using _calc_signature_0')
hmac = self._get_hmac()
s = params['Action'] + params['Timestamp']
hmac.update(s.encode('utf-8'))
keys = params.keys()
keys.sort(cmp=lambda x, y: cmp(x.lower(), y.lower()))
pairs = []
for key in keys:
val = txboto.utils.get_utf8_value(params[key])
pairs.append(key + '=' + quote(val))
qs = '&'.join(pairs)
return (qs, base64.b64encode(hmac.digest()))
def getSignedUrl(base_url, params, timestamp=None):
global HMAC
hmac = HMAC.copy()
# Add a ISO 8601 compliant timestamp (in GMT)
if timestamp:
params['Timestamp'] = timestamp
else:
params['Timestamp'] = time.strftime("%Y-%m-%dT%H:%M:%S", time.gmtime())
#params['SignatureVersion']='1'
# Sort the URL parameters by key
keys = params.keys()
#keys.sort(cmp = lambda x, y: cmp(x.lower(), y.lower()))
keys.sort()
# Reconstruct the URL parameters and encode them
pairs = []
for key in keys:
#val = urllib.quote(params[key])
val = params[key]
pairs.append(key + '=' + val)
url_string = '&'.join(pairs)
url_string = url_string.replace('+', "%20")
url_string = url_string.replace(':', "%3A")
#Construct the string to sign
urlparts = base_url.split('/')
string_to_sign = """GET
%s
/%s/%s
%s""" % (urlparts[2], urlparts[3], urlparts[4], url_string)
url_string = url_string.replace(';', urllib.quote(';'))
# Sign the request
hmac.update(string_to_sign)
signature = hmac.digest()
# Base64 encode the signature
signature = base64.encodestring(signature).strip()
signature = signature.replace('+', '%2B')
signature = signature.replace('=', '%3D')
signature = signature.replace('/', '%2F')
# Make the signature URL safe
url_string += "&Signature=%s" % signature
return "%s?%s" % (base_url, url_string)
def calc_signature(self, args):
scheme, host, port = requests.packages.urllib3.get_host(args['url'])
string_to_sign = '%s\n%s\n%s\n' % (args['method'], host, '/')
hmac = self.hmac.copy()
args['params']['SignatureMethod'] = 'HmacSHA256'
if self.credentials.token:
args['params']['SecurityToken'] = self.credentials.token
sorted_params = sorted(args['params'])
pairs = []
for key in sorted_params:
value = args['params'][key]
pairs.append(quote(key, safe='') + '=' + quote(value, safe='-_~'))
qs = '&'.join(pairs)
string_to_sign += qs
print('string_to_sign')
print(string_to_sign)
hmac.update(string_to_sign.encode('utf-8'))
b64 = base64.b64encode(hmac.digest()).strip().decode('utf-8')
return (qs, b64)
def calc_signature(self, args):
scheme, host, port = requests.packages.urllib3.get_host(args['url'])
string_to_sign = '%s\n%s\n%s\n' % (args['method'], host, '/')
hmac = self.hmac.copy()
args['params']['SignatureMethod'] = 'HmacSHA256'
if self.credentials.token:
args['params']['SecurityToken'] = self.credentials.token
sorted_params = sorted(args['params'])
pairs = []
for key in sorted_params:
value = args['params'][key]
pairs.append(quote(key, safe='') + '=' +
quote(value, safe='-_~'))
qs = '&'.join(pairs)
string_to_sign += qs
print('string_to_sign')
print(string_to_sign)
hmac.update(string_to_sign.encode('utf-8'))
b64 = base64.b64encode(hmac.digest()).strip().decode('utf-8')
return (qs, b64)
def _calc_signature(self, params, headers, verb, path):
boto.log.debug('using euca_signature')
string_to_sign = '%s\n%s\n%s\n' % (verb, headers['Date'], path)
keys = params.keys()
keys.sort()
pairs = []
for key in keys:
val = params[key]
pairs.append(urllib.quote(key, safe='') + '=' + urllib.quote(val, safe='-_~'))
qs = '&'.join(pairs)
boto.log.debug('query string: %s' % qs)
string_to_sign += qs
hmac = self.hmac.copy()
hmac.update(string_to_sign)
sha_manifest = hashlib.sha1()
sha_manifest.update(string_to_sign)
private_key = M2Crypto.RSA.load_key(self.private_key_path)
signature_value = private_key.sign(sha_manifest.digest())
b64 = base64.b64encode(signature_value)
boto.log.debug('len(b64)=%d' % len(b64))
boto.log.debug('base64 encoded digest: %s' % b64)
return (qs, b64)
def _calc_signature(self, params, headers, verb, path):
boto.log.debug('using euca_signature')
string_to_sign = '%s\n%s\n%s\n' % (verb, headers['Date'], path)
keys = list(params.keys())
keys.sort()
pairs = []
for key in keys:
val = params[key]
pairs.append(urllib.parse.quote(key, safe='') + '=' + urllib.parse.quote(val, safe='-_~'))
qs = '&'.join(pairs)
boto.log.debug('query string: %s' % qs)
string_to_sign += qs
hmac = self.hmac.copy()
hmac.update(string_to_sign)
sha_manifest = hashlib.sha1()
sha_manifest.update(string_to_sign)
private_key = crypto.RSA.load_key(self.private_key_path)
signature_value = private_key.sign(sha_manifest.digest())
b64 = base64.b64encode(signature_value)
boto.log.debug('len(b64)=%d' % len(b64))
boto.log.debug('base64 encoded digest: %s' % b64)
return (qs, b64)
def _calc_signature(self, params, verb, path, server_name):
boto.log.debug('using _calc_signature_2')
string_to_sign = '%s\n%s\n%s\n' % (verb, server_name.lower(), path)
hmac = self._get_hmac()
params['SignatureMethod'] = self.algorithm()
if self._provider.security_token:
params['SecurityToken'] = self._provider.security_token
keys = sorted(params.keys())
pairs = []
for key in keys:
val = boto.utils.get_utf8_value(params[key])
pairs.append(urllib.quote(key, safe='') + '=' +
urllib.quote(val, safe='-_~'))
qs = '&'.join(pairs)
boto.log.debug('query string: %s' % qs)
string_to_sign += qs
boto.log.debug('string_to_sign: %s' % string_to_sign)
hmac.update(string_to_sign)
b64 = base64.b64encode(hmac.digest())
boto.log.debug('len(b64)=%d' % len(b64))
boto.log.debug('base64 encoded digest: %s' % b64)
return (qs, b64)
def _calc_signature(self, params, verb, path, server_name):
boto.log.debug('using _calc_signature_2')
string_to_sign = '%s\n%s\n%s\n' % (verb, server_name.lower(), path)
hmac = self._get_hmac()
params['SignatureMethod'] = self.algorithm()
if self._provider.security_token:
params['SecurityToken'] = self._provider.security_token
keys = sorted(params.keys())
pairs = []
for key in keys:
val = boto.utils.get_utf8_value(params[key])
pairs.append(urllib.parse.quote(key, safe='') + '=' +
urllib.parse.quote(val, safe='-_~'))
qs = '&'.join(pairs)
boto.log.debug('query string: %s' % qs)
string_to_sign += qs
boto.log.debug('string_to_sign: %s' % string_to_sign)
hmac.update(string_to_sign.encode('utf-8'))
b64 = base64.b64encode(hmac.digest())
boto.log.debug('len(b64)=%d' % len(b64))
boto.log.debug('base64 encoded digest: %s' % b64)
return (qs, b64)
def sign_string(self, to_sign):
hmac = self.hmac.copy()
hmac.update(to_sign)
return base64.b64encode(hmac.digest())
def hash(self, value):
hmac = self.newHMAC()
hmac.update(value)
return hmac.digest()
T = arraysA[i] * QBj
U = str(T.x) + str(T.y) + "NoNeedToRunAndHide"
U = str.encode(U)
K_ENC = SHA3_256.new(U)
K_ENC = K_ENC.digest()
K_MAC = SHA3_256.new(K_ENC)
K_MAC = K_MAC.digest()
# Encyption
cipher = AES.new(K_ENC, AES.MODE_CTR)
ctext = str.encode(mesg)
ctext = cipher.encrypt(ctext)
#hmac calculation
hmac = HMAC.new(K_MAC, digestmod=SHA256)
hmac = hmac.update(ctext)
hmac = hmac.digest()
msg = cipher.nonce + ctext + hmac
msg = int.from_bytes(msg, byteorder="big")
### Send message to student B
mes = {'ID_A': stuID, 'ID_B': stuID_B, 'I': i, 'J': j, 'MSG': msg}
response = requests.put('{}/{}'.format(API_URL, "SendMsg"), json=mes)
print(response.json())
'''
## Get your message
mes = {'ID_A': stuID, 'S': s, 'H': h}
response = requests.get('{}/{}'.format(API_URL, "ReqMsg_PH3"), json = mes)
print(response.json())
if(response.ok): ## Decrypt message
res = response.json()
def s3_authorization(self, headers, verb, path):
c_string = boto.utils.canonical_string(verb, path, headers)
hmac = self.hmac.copy()
hmac.update(c_string)
b64_hmac = base64.encodestring(hmac.digest()).strip()
return b64_hmac
def request_new_test(self, duration, interval, hmac_hex):
"""Request a new test instance.
This will allocate a new ITGRecv instance and parse the log file it produces.
The results of this can then be retrieved with get_test_results() after the
test has run.
The parameters are:
duration: Requested test duration in seconds. The ITGRecv instance will be killed
after this time has passed (+ a grace period of five seconds).
interval: The requested interval for data points, in milliseconds (passed to ITGDec).
hmac_hex: A hexadecimal HMAC-SHA256 of the two other parameters computed by
concatenating their ASCII representations. The HMAC secret is configured
by the operator of the control server instance.
The return value is a dictionary with the following keys:
status: 'OK' if everything went well, 'Error' otherwise.
message: Set if status is 'Error'; contains an error message.
test_id: The assigned test ID, to be passed to get_test_results() after the duration
has expired.
port: The control server port of the ITGRecv instance. The sender is expected to
use port+1 for the data connection.
"""
self._collect_garbage()
duration = int(duration)
interval = int(interval)
hmac = self.hmac.copy()
hmac.update(str(duration).encode())
hmac.update(str(interval).encode())
if hmac.hexdigest() != hmac_hex:
return {
'status': 'Error',
'message': "HMAC authentication failure."
}
if duration <= 0 or interval <= 0:
return {
'status': 'Error',
'message': "Duration and interval must be positive integers."
}
if duration > self.max_test_time:
return {
'status':
'Error',
'message':
"Maximum test time of %d seconds exceeded." %
self.max_test_time
}
if interval > duration * 1000:
return {
'status': 'Error',
'message': "Interval must be <= duration."
}
if len(self.children) >= self.max_instances:
return {
'status':
'Error',
'message':
"Too many concurrent instances running. Try again later."
}
test_id = "".join(random.sample(ALPHABET, self.id_length))
# Need one port for control, one for data (if the data stream is TCP).
port = self.current_port
self.current_port += 2
return self._spawn_receiver(test_id, duration, interval, port)
U = str(T.x)+str(T.y)+"NoNeedToRunAndHide"
U = str.encode(U)
K_ENC = SHA3_256.new(U)
K_ENC = K_ENC.digest()
K_MAC = SHA3_256.new(K_ENC)
K_MAC = K_MAC.digest()
# Encyption
cipher = AES.new(K_ENC, AES.MODE_CTR)
ctext=str.encode(mesg)
ctext=cipher.encrypt(ctext)
print("ctext:",ctext)
#hmac calculation is missing
hmac=HMAC.new(K_MAC,digestmod=SHA256)
hmac=hmac.update(str.encode(str(ctext)))
hmac=hmac.digest()
print("hmac:",hmac)
msg = cipher.nonce + ctext + hmac
print("nonce+ctext+hmac:",msg)
msg = int.from_bytes(msg, byteorder="big")
print("int of the ctext:",msg)
### Send message to student B
mes = {'ID_A': stuID, 'ID_B':stuID_B, 'I': i, 'J':j, 'MSG': msg}
response = requests.put('{}/{}'.format(API_URL, "SendMsg"), json = mes)
print(response.json())
## Get your message
mes = {'ID_A': stuID, 'S': s, 'H': h}
response = requests.get('{}/{}'.format(API_URL, "ReqMsg_PH3"), json = mes)