def sha256sum(hash,filename, block_size=65536):
from hashlib import sha256 #hashlib to make our lives easier, no reason to import the whole thing
sha256 = sha256()
with open(filename, 'rb') as f:
for block in iter(lambda: f.read(block_size), b''):
sha256.update(block)
if hash == sha256.hexdigest(): return True
else: return False
def test_file():
try:
convert()
with open("sample.webp", "rb") as f:
for chunk in iter(lambda: f.read(4096), b""):
sha256.update(chunk)
assert sha256.hexdigest() == hash
except:
pass
def pack_header(self):
header = self.version_binary_str
sha256 = hashlib.sha256()
sha256.update(self.version_binary_str)
checksum = sha256.digest()[:4]
header = header + checksum
header = header + b'\x00' * (32 - len(header))
packhash = bytearray.fromhex(self.packed_hash)
header = header + packhash
# signature part
header = header + b'\x00' * 64
return header
def verify_page(request, uniqeId):
if request.method == 'GET':
if not uniqeId:
return HttpResponse("Page not found")
id1 = VDG_M_documentDetails.objects.filter(VGuid=uniqeId).first()
if not id1:
return HttpResponse("Page not found")
file_url1 = id1.Fileurl
hash1 = ""
try:
sha256 = hashlib.sha256()
txt = urllib2.urlopen(file_url1).read()
sha256.update(txt)
hash1 = sha256.hexdigest()
except urllib.error.URLError as e:
return render(request, 'verify/verify.html', {
'status': False,
'failedStage': 1
})
print(hash1)
if id1.Hash != hash1:
return render(request, 'verify/verify.html', {
'status': False,
'failedStage': 2
})
customer_ID = id1.CustomeID
unique_id = id1.VGuid
created_on1 = ""
return render(
request, 'verify/verify.html', {
'customer_ID': customer_ID,
'unique_id': unique_id,
'hash1': hash1,
'created_on1': created_on1,
'file_url1': file_url1
})
def calculate_checksum(self, content, length = 8):
sha256 = hashlib.sha256()
sha256.update(content)
checksum = sha256.digest()[:length]
return checksum
def post(self, request,*argv, **kwargs):
if request.method == 'POST':
key1 = self.request.META.get('HTTP_APIKEY',None)
payload1 = self.request.META.get('HTTP_PAYLOAD',None)
uniqueId = self.request.data['uniqueId']
fileurl = self.request.data['fileurl']
metadata = self.request.data['metadata']
delimeter = self.request.data['delimeter']
if not uniqueId:
response_data = {}
response_data['returncode'] = '2'
response_data['message'] = 'UniqueId not found'
return HttpResponse(json.dumps(response_data), content_type="application/json")
if not key1:
response_data = {}
response_data['returncode'] = '2'
response_data['message'] = 'Apikey not found'
return HttpResponse(json.dumps(response_data), content_type="application/json")
if not payload1:
response_data = {}
response_data['returncode'] = '2'
response_data['message'] = 'Payload not found'
return HttpResponse(json.dumps(response_data), content_type="application/json")
payload1 = payload1.lower()
#que = ApiKeyToken.objects.filter(key = key1).values_list('secret_key', flat=True)
que = ApiKeyToken.objects.filter(key = key1).first()
if not que:
response_data = {}
response_data['returncode'] = '2'
response_data['message'] = 'Sorry you are not authorized user!!'
context = {'response_data':response_data}
return HttpResponse(json.dumps(response_data), content_type="application/json")
sec_key = que.secret_key
secret = key1+uniqueId+fileurl+metadata+delimeter+sec_key
hash_object = hashlib.sha256(str(secret).encode('utf-8'))
payload = hash_object.hexdigest()
if payload != payload1:
response_data = {}
response_data['returncode'] = '2'
response_data['message'] = 'Sorry you are not authorized user...!!'
context = {'response_data':response_data}
return HttpResponse(json.dumps(response_data), content_type="application/json")
id_get = VDG_M_documentDetails.objects.filter(VGuid = uniqueId).first()
if not id_get:
response_data = {}
response_data['returncode'] = '2'
response_data['message'] = 'UniqueId not found'
context = {'response_data':response_data}
return HttpResponse(json.dumps(response_data), content_type="application/json")
if id_get.CustomeID !=que.user.id :
response_data = {}
response_data['returncode'] = '2'
response_data['message'] = 'Sorry you are not authorized user...!!'
context = {'response_data':response_data}
return HttpResponse(json.dumps(response_data), content_type="application/json")
try:
sha256 = hashlib.sha256()
txt = urllib2.urlopen(fileurl).read()
sha256.update(txt)
h2 = sha256.hexdigest()
except urllib.error.URLError as e:
response_data = {}
response_data['returncode'] = '2'
response_data['message'] = 'No such file Found.'
return HttpResponse(json.dumps(response_data), content_type="application/json")
id_get.Fileurl = fileurl
id_get.Metadata = metadata
id_get.Hash = h2
id_get.delimeter = delimeter
id_get.Modified_on = datetime.datetime.now()
id_get.Modified_by = que.user.id
id_get.save()
response_data = {}
response_data['returncode'] = '1'
response_data['message'] = 'Value updated successfully.'
response_data['uniqueId'] = uniqueId
response_data['FileHash'] = h2
return HttpResponse(json.dumps(response_data), content_type="application/json")