示例#1
0
    def test_load_key(self):
        pri_k, pub_k = ECCipher.load_key_pair(self.private_key_file_path,
                                              self.password)
        self.assertIsNotNone(pri_k)
        self.assertIsNotNone(pub_k)

        pri_key = ECCipher.load_private_key(self.private_key_file_path,
                                            self.password)
        self.assertIsNotNone(pri_key)

        msg = 'test123'
        sig = ECCipher.create_signature(pri_key, msg)
        print('sig:', sig)
        self.assertIsNotNone(sig)

        create_pub_key = ECCipher.create_public_key_from_private_key(pri_key)
        self.assertIsNotNone(create_pub_key)

        load_pub_key = ECCipher.load_public_key(self.private_key_file_path,
                                                self.password)
        self.assertIsNotNone(load_pub_key)

        v1 = ECCipher.verify_sign(load_pub_key, sig, msg)
        self.assertTrue(v1)

        v2 = ECCipher.verify_sign(create_pub_key, sig, msg)
        self.assertTrue(v2)

        addr = ECCipher.get_address_from_public_key(load_pub_key)
        print(addr)
        self.assertIsNotNone(addr)
示例#2
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    def test_generate_key_pair_signature_and_verify(self):
        private_key_file_path = join_with_root(private_key_file)
        password_path = join_with_root(private_key_password_file)

        with open(password_path) as f:
            password = f.read()

        print(password)
        new_pri_key, pub_key = ECCipher.load_key_pair(private_key_file_path,
                                                      password)

        sample = b"qZaQ6S"
        print("gen prikey:", new_pri_key)

        self.assertIsNotNone(new_pri_key)

        new_signature = ECCipher.create_signature(new_pri_key, sample)
        print("new_signature is:", new_signature)
        self.assertIsNotNone(new_signature)

        # pub_key = ECCipher.create_public_key(new_pub_key)
        is_valid_sign = ECCipher.verify_sign(pub_key, new_signature, sample)

        print("is valid new_signature:", is_valid_sign)
        self.assertTrue(is_valid_sign)
示例#3
0
文件: net.py 项目: Alex-Cheng/pdash
 def login(self, username=None):
     header = {'Content-Type': 'application/json'}
     data = {'public_key': self.public_key, 'username': username}
     resp = yield treq.post(url=self.url + 'account/v1/login/',
                            headers=header,
                            json=data,
                            persistent=False)
     confirm_info = yield treq.json_content(resp)
     logger.debug("login response: %s", confirm_info)
     self.nonce = confirm_info['message']
     logger.debug('nonce: %s', self.nonce)
     signature = ECCipher.create_signature(self.account.private_key,
                                           self.nonce)
     header_confirm = {'Content-Type': 'application/json'}
     data_confirm = {
         'public_key': self.public_key,
         'code': Encoder.bytes_to_hex(signature)
     }
     resp = yield treq.post(self.url + 'account/v1/confirm/',
                            headers=header_confirm,
                            json=data_confirm,
                            persistent=False)
     confirm_info = yield treq.json_content(resp)
     self.token = confirm_info['message']
     return confirm_info['status']
示例#4
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    def test_load_key_pair_from_private_key_and_verify_signature(self):

        private_key_file_path = join_with_root(private_key_file)
        password_path = join_with_root(private_key_password_file)

        with open(password_path) as f:
            password = f.read()

        print(password)
        pri_key, pub_key = ECCipher.load_key_pair(private_key_file_path,
                                                  password)

        # ---------- sign and verify ------------
        data = "testdata"
        new_signature = ECCipher.create_signature(pri_key, data)
        print("new_signature is:" + new_signature.hex())

        is_valid_sign = verify_geth_signature(pub_key, new_signature, data)
        print("is valid new_signature:" + str(is_valid_sign))
        self.assertTrue(is_valid_sign, "should be success")

        is_valid_sign = verify_geth_signature(pub_key, new_signature,
                                              data + "error")
        print("is valid new_signature:" + str(is_valid_sign))
        self.assertFalse(is_valid_sign, "should be failed")
示例#5
0
文件: chain.py 项目: Alex-Cheng/pdash
    def seller_send_request_stream(self, order_info):
        logger.debug("seller send request to proxy ...")
        order_id = list(order_info.keys())[0]
        new_order_info = order_info[order_id]
        market_hash = new_order_info[0]
        seller_addr = eth_addr_to_string(new_order_info[3])
        buyer_addr = eth_addr_to_string(new_order_info[2])
        buyer_rsa_public_key = new_order_info[1]
        proxy_id = eth_addr_to_string(new_order_info[4])
        session = get_session()
        raw_aes_key = session.query(FileInfo.aes_key) \
            .filter(FileInfo.market_hash == Encoder.bytes_to_base64_str(market_hash)) \
            .all()[0][0]
        logger.debug("start to encrypt aes key with buyer rsa public key")
        logger.debug("raw aes key: %s", raw_aes_key)
        logger.debug("buyer rsa public key: %s", buyer_rsa_public_key)
        encrypted_aes_key = load_der_public_key(
            buyer_rsa_public_key, backend=default_backend()).encrypt(
                raw_aes_key,
                padding.OAEP(mgf=padding.MGF1(algorithm=hashes.SHA256()),
                             algorithm=hashes.SHA256(),
                             label=None))
        logger.debug("encrypted aes key: %s", encrypted_aes_key)
        logger.debug("order info got generated")
        message = Message()
        seller_data = message.seller_data
        message.type = Message.SELLER_DATA
        seller_data.order_id = order_id
        seller_data.order_type = 'stream'
        seller_data.seller_addr = seller_addr
        seller_data.buyer_addr = buyer_addr
        seller_data.market_hash = Encoder.bytes_to_base64_str(market_hash)
        seller_data.AES_key = encrypted_aes_key
        storage = seller_data.storage

        storage_type = session.query(FileInfo.remote_type) \
            .filter(FileInfo.market_hash == Encoder.bytes_to_base64_str(market_hash)) \
            .all()[0][0]
        remote_uri = session.query(FileInfo.remote_uri) \
            .filter(FileInfo.market_hash == Encoder.bytes_to_base64_str(market_hash)) \
            .all()[0][0]
        storage.type = storage_type
        storage.path = remote_uri

        sign_message = SignMessage()
        sign_message.public_key = self.wallet.market_client.public_key
        sign_message.data = message.SerializeToString()
        sign_message.signature = ECCipher.create_signature(
            self.wallet.market_client.account.private_key, sign_message.data)
        try:
            error, AES_key, urls = yield start_proxy_request(
                sign_message, proxy_id)
            if error:
                logger.error(error)
            else:
                logger.debug(AES_key)
                logger.debug(urls)
                event.emit(events.SELLER_DELIVERY, order_id)
        except Exception as e:
            logger.error(e)
示例#6
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def sign_buyer_message(message):
    sign_message = SignMessage()
    sign_message.public_key = buyer_public_key
    sign_message.data = message.SerializeToString()
    sign_message.signature = ECCipher.create_signature(buyer_private_key,
                                                       sign_message.data)

    return sign_message
示例#7
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文件: chain.py 项目: Alex-Cheng/pdash
    def buyer_send_request(self, order_info):
        logger.debug("buyer send request to proxy ...")
        order_id = list(order_info.keys())[0]
        new_order_info = order_info[order_id]
        seller_addr = eth_addr_to_string(new_order_info[3])
        buyer_addr = eth_addr_to_string(new_order_info[2])
        proxy_id = eth_addr_to_string(new_order_info[4])
        message = Message()
        buyer_data = message.buyer_data
        message.type = Message.BUYER_DATA
        buyer_data.order_id = order_id
        buyer_data.order_type = 'file'
        buyer_data.seller_addr = seller_addr
        buyer_data.buyer_addr = buyer_addr
        buyer_data.market_hash = Encoder.bytes_to_base64_str(new_order_info[0])

        sign_message = SignMessage()
        sign_message.public_key = self.wallet.market_client.public_key
        sign_message.data = message.SerializeToString()
        sign_message.signature = ECCipher.create_signature(
            self.wallet.market_client.account.private_key, sign_message.data)
        error, AES_key, urls = yield start_proxy_request(
            sign_message, proxy_id)

        def update_buyer_db(file_uri, file_path):
            market_hash = Encoder.bytes_to_base64_str(new_order_info[0])
            file_uuid = file_uri.split('/')[3]
            session = get_session()
            session.query(BuyerFileInfo).filter(
                BuyerFileInfo.order_id == order_id).update(
                    {
                        BuyerFileInfo.market_hash: market_hash,
                        BuyerFileInfo.is_downloaded: True,
                        BuyerFileInfo.file_uuid: file_uuid,
                        BuyerFileInfo.path: file_path,
                        BuyerFileInfo.size: os.path.getsize(file_path)
                    },
                    synchronize_session=False)
            session.commit()

        if error:
            logger.error(error)
        else:
            file_name = urls[0].split('/')[3]
            file_dir = join_with_rc(config.wallet.download_dir)
            # create if not exists
            os.makedirs(file_dir, exist_ok=True)
            file_path = os.path.join(file_dir, file_name)
            yield download_proxy_file(urls[0], file_path)
            logger.debug("downloaded file path: %s", file_path)
            decrypted_file = decrypt_file_aes(file_path, AES_key)
            logger.debug('Decrypted file path: %s', str(decrypted_file))

            update_buyer_db(urls[0], decrypted_file)
            logger.debug("file has been downloaded")
            logger.debug("put order into confirmed queue, order id: %s",
                         order_id)
        event.emit(events.BUYER_RECEIVE, order_id)
示例#8
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文件: net.py 项目: Alex-Cheng/pdash
 def publish_product(self,
                     selected_id,
                     title,
                     ptype,
                     description,
                     price,
                     tags,
                     start_date,
                     end_date,
                     category=None,
                     cover_image=None):
     logger.debug("start publish product")
     header = {'Content-Type': 'multipart/form-data'}  # 'application/json'}
     header['MARKET-KEY'] = self.public_key
     header['MARKET-TOKEN'] = self.token
     logger.debug('header token: %s', self.token)
     data = {
         'owner_address': self.public_key,
         'title': title,
         'ptype': ptype,
         'description': description,
         'price': price,
         'tags': tags,
         'start_date': start_date,
         'end_date': end_date,
         'category': category
     }
     signature_source = str(
         self.public_key) + str(title) + str(ptype) + str(
             description) + str(price) + MarketClient.str_to_timestamp(
                 start_date) + MarketClient.str_to_timestamp(end_date)
     signature = ECCipher.create_signature(self.account.private_key,
                                           signature_source)
     data['signature'] = Encoder.bytes_to_hex(signature)
     logger.debug("signature: %s", data['signature'])
     try:
         url = self.url + 'product/v1/allproducts/'
         resp = yield treq.post(
             url,
             files=dict(cover_image=open(cover_image, 'rb')),
             headers=header,
             data=data,
             persistent=False)
         confirm_info = yield treq.json_content(resp)
         logger.debug('market_hash: %s',
                      confirm_info['data']['market_hash'])
         market_hash = confirm_info['data']['market_hash']
     except Exception as e:
         logger.exception(e)
     if ptype == 'file' or ptype == 'stream':
         publish_file_update(market_hash, selected_id)
     return market_hash
示例#9
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def sign_proxy_data(data):
    public_key = _proxy_account.public_key
    private_key = _proxy_account.private_key

    signature = ECCipher.create_signature(private_key, data)

    msg = {
        'data': data,
        'public_key': ECCipher.serialize_public_key(public_key),
        'signature': signature
    }

    return packb(msg, use_bin_type=True)
示例#10
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    def __generate_nonce_signature_and_get_token(self, header, nonce, pub_key_str, pri_key):
        url = '%s/account/v1/confirm/' % HOST
        print("nonce:%s" % nonce)
        nonce_signature = ECCipher.create_signature(pri_key, nonce)

        payload = {"public_key": pub_key_str, "code": Encoder.bytes_to_hex(nonce_signature)}
        confirm_resp = requests.post(url, headers=header, json=payload)
        print("response:%s" , confirm_resp.text)
        self.assertEqual(confirm_resp.status_code, 200)
        parsed_json = json.loads(confirm_resp.text)
        self.assertEqual(parsed_json['status'], 1)
        token = parsed_json['message']
        print("token:%s" % token)
        return token
示例#11
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文件: chain.py 项目: Alex-Cheng/pdash
    def buyer_send_request_stream(self, order_info):
        logger.debug("buyer send request to proxy ...")
        order_id = list(order_info.keys())[0]
        new_order_info = order_info[order_id]
        seller_addr = eth_addr_to_string(new_order_info[3])
        buyer_addr = eth_addr_to_string(new_order_info[2])
        proxy_id = eth_addr_to_string(new_order_info[4])
        message = Message()
        buyer_data = message.buyer_data
        message.type = Message.BUYER_DATA
        buyer_data.order_id = order_id
        buyer_data.order_type = 'stream'
        buyer_data.seller_addr = seller_addr
        buyer_data.buyer_addr = buyer_addr
        buyer_data.market_hash = Encoder.bytes_to_base64_str(new_order_info[0])

        sign_message = SignMessage()
        sign_message.public_key = self.wallet.market_client.public_key
        sign_message.data = message.SerializeToString()
        sign_message.signature = ECCipher.create_signature(
            self.wallet.market_client.account.private_key, sign_message.data)

        error, AES_key, urls = yield start_proxy_request(
            sign_message, proxy_id)

        def update_buyer_db(stream_id):
            session = get_session()
            session.query(BuyerFileInfo).filter(
                BuyerFileInfo.order_id == order_id).update(
                    {
                        BuyerFileInfo.is_downloaded: True,
                        BuyerFileInfo.path: stream_id,
                    },
                    synchronize_session=False)
            session.commit()

        if error:
            logger.error(error)
        else:
            update_buyer_db(json.dumps(urls))
            logger.debug("Stream data has been geted")
        event.emit(events.BUYER_RECEIVE, order_id)
示例#12
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    def send_buyer_message(self, order):
        global kad_port

        message = Message()
        buyer_data = message.buyer_data
        message.type = Message.BUYER_DATA
        buyer_data.order_id = order['order_id']
        buyer_data.order_type = order['order_type']
        buyer_data.seller_addr = order['seller']
        buyer_data.buyer_addr = order['buyer']
        buyer_data.market_hash = order['market_hash']

        sign_message = SignMessage()
        sign_message.public_key = self.public_key
        sign_message.data = message.SerializeToString()
        sign_message.signature = ECCipher.create_signature(
            self.private_key,
            sign_message.data
            )

        kad_port += 1

        proxy_id = order['proxy']

        error, AES_key, urls = yield start_proxy_request(sign_message, proxy_id, kad_port)

        if error:
            print(error)
        else:
            print(urls)
            if order['order_type'] == 'file':
                file_name = urls[0].split('/')[3]
                file_dir = join_with_rc(config.wallet.download_dir)
                # create if not exists
                os.makedirs(file_dir, exist_ok=True)
                file_path = os.path.join(file_dir, file_name)

                yield download_proxy_file(urls[0], file_path)
示例#13
0
    def __generate_nonce_signature_and_get_token(self, header, nonce,
                                                 pub_key_str, pri_key):
        url = reverse('confirm')
        print("nonce:%s" % nonce)
        nonce_signature = ECCipher.create_signature(pri_key, nonce)

        payload = {
            "public_key": pub_key_str,
            "code": Encoder.bytes_to_hex(nonce_signature)
        }
        # self.client.head(header)
        confirm_resp = self.client.post(url,
                                        data=payload,
                                        format='json',
                                        **header)

        self.assertEqual(confirm_resp.status_code, 200)
        resp = confirm_resp.content.decode("utf-8")
        print("response:%s" % resp)
        parsed_json = json.loads(resp)
        self.assertEqual(parsed_json['status'], 1)
        token = parsed_json['message']
        print("token:%s" % token)
        return token
示例#14
0
    def send_seller_message(self, order):
        global kad_port

        message = Message()
        seller_data = message.seller_data
        message.type = Message.SELLER_DATA
        seller_data.order_id = order['order_id']
        seller_data.order_type = order['order_type']
        seller_data.seller_addr = order['seller']
        seller_data.buyer_addr = order['buyer']
        seller_data.market_hash = order['market_hash']
        seller_data.AES_key = order['AES_key']

        storage = seller_data.storage

        storage.type = order['storage_type']
        storage.path = order['storage_path']

        sign_message = SignMessage()
        sign_message.public_key = self.public_key
        sign_message.data = message.SerializeToString()
        sign_message.signature = ECCipher.create_signature(
            self.private_key,
            sign_message.data
            )

        kad_port += 1

        proxy_id = order['proxy']

        error, AES_key, urls = yield start_proxy_request(sign_message, proxy_id, kad_port)

        if error:
            print(error)
        else:
            print(urls)
示例#15
0
    def publish_product(self, selected_id, title, description, price, tags, start_date, end_date,
                        file_md5, size):

        logger.debug("start publish product")
        header = {'Content-Type': 'application/json'}
        header['MARKET-KEY'] = self.public_key
        header['MARKET-TOKEN'] = self.token
        logger.debug('header token: %s', self.token)
        data = {'owner_address': self.public_key, 'title': title, 'description': description,
                'price': price, 'tags': tags, 'start_date': start_date, 'end_date': end_date,
                'file_md5': file_md5, 'size': size}
        signature_source = str(self.public_key) + str(title) + str(description) + str(
            price) + MarketClient.str_to_timestamp(start_date) + MarketClient.str_to_timestamp(end_date) + str(file_md5)
        signature = ECCipher.create_signature(self.account.private_key, signature_source)
        data['signature'] = Encoder.bytes_to_hex(signature)
        logger.debug("signature: %s", data['signature'])
        resp = yield treq.post(self.url + 'product/v1/product/publish/', headers=header, json=data, persistent=False)
        confirm_info = yield treq.json_content(resp)
        print(confirm_info)

        logger.debug('market_hash: %s', confirm_info['data']['market_hash'])
        market_hash = confirm_info['data']['market_hash']
        publish_file_update(market_hash, selected_id)
        return market_hash
示例#16
0
def buyer_request():
    message = Message()
    buyer_data = message.buyer_data
    message.type = Message.BUYER_DATA
    buyer_data.order_id = order_id
    buyer_data.order_type = order_type
    buyer_data.seller_addr = seller_addr
    buyer_data.buyer_addr = buyer_addr
    buyer_data.market_hash = 'MARKET_HASH'

    sign_message = SignMessage()
    sign_message.public_key = buyer_public_key
    sign_message.data = message.SerializeToString()
    sign_message.signature = ECCipher.create_signature(buyer_private_key,
                                                       sign_message.data)

    proxy_list = yield pick_proxy()
    proxy_id = proxy_list[0]  # should be selected by UI from proxy list

    if proxy_id:
        error, AES_key, urls = yield start_proxy_request(
            sign_message, proxy_id)

        if error:
            print(error)
        else:
            print(AES_key)
            print(urls)

            file_name = urls[0].split('/')[3]
            file_dir = join_with_rc(config.wallet.download_dir)
            # create if not exists
            os.makedirs(file_dir, exist_ok=True)
            file_path = os.path.join(file_dir, file_name)

            yield download_proxy_file(urls[0], file_path)
示例#17
0
def seller_request():
    # seller_request
    message = Message()
    seller_data = message.seller_data
    message.type = Message.SELLER_DATA
    seller_data.order_id = order_id
    seller_data.order_type = order_type
    seller_data.seller_addr = seller_addr
    seller_data.buyer_addr = buyer_addr
    seller_data.market_hash = 'MARKET_HASH'
    seller_data.AES_key = b'AES_key'

    storage = seller_data.storage

    #stream test
    storage.type = 'stream'

    storage_plugin = "cpchain.storage_plugin."
    module = importlib.import_module(storage_plugin + storage.type)
    s = module.Storage()
    param = yield s.user_input_param()
    param['proxy_id'] = param['proxy_id'][
        0]  # should be selected by UI from proxy list
    storage.path = yield s.upload_data(None, param)

    # proxy storage
    # storage.type = 'proxy'

    # storage_plugin = "cpchain.storage_plugin."
    # module = importlib.import_module(storage_plugin + storage.type)
    # s = module.Storage()
    # param = yield s.user_input_param()
    # param['proxy_id'] = param['proxy_id'][0] # should be selected by UI from proxy list
    # storage.path = yield s.upload_data('/bin/bash', param)

    # ipfs storage
    # storage.type = 'ipfs'

    # storage_plugin = "cpchain.storage_plugin."
    # module = importlib.import_module(storage_plugin + storage.type)
    # s = module.Storage()
    # param = yield s.user_input_param()
    # storage.path = yield s.upload_data('/bin/bash', param)

    # # S3 storage
    # storage.type = 's3'

    # storage_plugin = "cpchain.storage_plugin."
    # module = importlib.import_module(storage_plugin + storage.type)
    # s = module.Storage()
    # param = yield s.user_input_param()
    # storage.path = yield s.upload_data('/bin/bash', param)

    sign_message = SignMessage()
    sign_message.public_key = seller_public_key
    sign_message.data = message.SerializeToString()
    sign_message.signature = ECCipher.create_signature(seller_private_key,
                                                       sign_message.data)

    proxy_list = yield pick_proxy()
    proxy_id = proxy_list[0]  # should be selected by UI from proxy list

    if proxy_id:
        error, AES_key, urls = yield start_proxy_request(
            sign_message, proxy_id)

        if error:
            print(error)
        else:
            print(AES_key)
            print(urls)
示例#18
0
文件: utils.py 项目: jkulesza/pdash
def sign(private_key, message):
    return ECCipher.create_signature(private_key=private_key, message=message)
示例#19
0
    def seller_send_request(self, order_info):
        logger.debug("seller send request to proxy ...")
        order_id = list(order_info.keys())[0]
        new_order_info = order_info[order_id]
        market_hash = new_order_info[0]
        seller_addr = eth_addr_to_string(new_order_info[3])
        buyer_addr = eth_addr_to_string(new_order_info[2])
        buyer_rsa_public_key = new_order_info[1]
        proxy_id = eth_addr_to_string(new_order_info[4])
        session = get_session()
        raw_aes_key = session.query(FileInfo.aes_key) \
            .filter(FileInfo.market_hash == Encoder.bytes_to_base64_str(market_hash)) \
            .all()[0][0]
        logger.debug("start to encrypt aes key with buyer rsa public key")
        logger.debug("raw aes key: %s", raw_aes_key)
        logger.debug("buyer rsa public key: %s", buyer_rsa_public_key)
        encrypted_aes_key = load_der_public_key(
            buyer_rsa_public_key, backend=default_backend()).encrypt(
                raw_aes_key,
                padding.OAEP(mgf=padding.MGF1(algorithm=hashes.SHA256()),
                             algorithm=hashes.SHA256(),
                             label=None))
        logger.debug("encrypted aes key: %s", encrypted_aes_key)
        file_hash = session.query(FileInfo.hashcode) \
            .filter(FileInfo.market_hash == Encoder.bytes_to_base64_str(market_hash)) \
            .all()[0][0]
        logger.debug("order info got generated")
        message = Message()
        seller_data = message.seller_data
        message.type = Message.SELLER_DATA
        seller_data.order_id = order_id
        seller_data.seller_addr = seller_addr
        seller_data.buyer_addr = buyer_addr
        seller_data.market_hash = 'market hash'
        seller_data.AES_key = encrypted_aes_key
        storage = seller_data.storage

        # ipfs storage example
        storage.type = Message.Storage.IPFS
        ipfs = storage.ipfs
        ipfs.file_hash = file_hash
        ipfs.gateway = "192.168.0.132:5001"

        sign_message = SignMessage()
        sign_message.public_key = self.wallet.market_client.public_key
        sign_message.data = message.SerializeToString()
        sign_message.signature = ECCipher.create_signature(
            self.wallet.accounts.default_account.private_key,
            sign_message.data)

        seller_sign_message = sign_message
        logger.debug("message created")
        d_proxy_reply = start_proxy_request(seller_sign_message,
                                            proxy_id=proxy_id)

        def seller_deliver_proxy_callback(proxy_reply):
            logger.debug("in seller request callback.")
            if not proxy_reply.error:
                logger.debug("receive reply from proxy")
                logger.debug('file_uri: %s', proxy_reply.file_uri)
            else:
                logger.debug(proxy_reply.error)

        d_proxy_reply.addCallback(seller_deliver_proxy_callback)
示例#20
0
    def buyer_send_request(self, order_info):
        logger.debug("buyer send request to proxy ...")
        order_id = list(order_info.keys())[0]
        new_order_info = order_info[order_id]
        seller_addr = eth_addr_to_string(new_order_info[3])
        buyer_addr = eth_addr_to_string(new_order_info[2])
        proxy_id = eth_addr_to_string(new_order_info[4])
        message = Message()
        buyer_data = message.buyer_data
        message.type = Message.BUYER_DATA
        buyer_data.order_id = order_id
        buyer_data.seller_addr = seller_addr
        buyer_data.buyer_addr = buyer_addr
        buyer_data.market_hash = 'market hash'

        sign_message = SignMessage()
        sign_message.public_key = self.wallet.market_client.public_key
        sign_message.data = message.SerializeToString()
        sign_message.signature = ECCipher.create_signature(
            self.wallet.accounts.default_account.private_key,
            sign_message.data)
        buyer_sign_message = sign_message
        d_proxy_reply = start_proxy_request(buyer_sign_message,
                                            proxy_id=proxy_id)

        def update_buyer_db(file_uri, file_path):
            market_hash = Encoder.bytes_to_base64_str(new_order_info[0])
            file_uuid = file_uri.split('/')[3]
            session = get_session()
            session.query(BuyerFileInfo).filter(
                BuyerFileInfo.order_id == order_id).update(
                    {
                        BuyerFileInfo.market_hash: market_hash,
                        BuyerFileInfo.is_downloaded: True,
                        BuyerFileInfo.file_uuid: file_uuid,
                        BuyerFileInfo.path: file_path,
                        BuyerFileInfo.size: os.path.getsize(file_path)
                    },
                    synchronize_session=False)
            session.commit()
            return market_hash

        def buyer_request_proxy_callback(proxy_reply):
            logger.debug("in buyer request callback.")
            if not proxy_reply.error:
                logger.debug('file_uri: %s', proxy_reply.file_uri)
                file_dir = os.path.expanduser(config.wallet.download_dir)
                file_name = proxy_reply.file_uri.split('/')[3]
                file_path = os.path.join(file_dir, file_name)
                logger.debug("downloaded file path: %s", file_path)
                decrypted_file = decrypt_file_aes(file_path,
                                                  proxy_reply.AES_key)
                logger.debug('Decrypted file path: %s', str(decrypted_file))

                update_buyer_db(proxy_reply.file_uri, decrypted_file)
                logger.debug("file has been downloaded")
                logger.debug("put order into confirmed queue, order id: %s",
                             order_id)
                self.confirmed_order_queue.put(order_id)
                self.wallet.main_wnd.update_purchased_tab('downloaded')
            else:
                logger.debug(proxy_reply.error)

        d_proxy_reply.addCallback(buyer_request_proxy_callback)