def get_item_list_from_contract(identity_acct: Account) -> list:
sdk = app.config['ONTOLOGY']
if not isinstance(sdk, Ontology):
return list()
get_item_list_func = WasmInvokeFunction('get_item_list')
get_item_list_func.set_params_value(identity_acct.get_address())
tx = sdk.wasm_vm.make_invoke_transaction(
app.config['CONTRACT_ADDRESS_HEX'], get_item_list_func,
identity_acct.get_address(), app.config['GAS_PRICE'],
app.config['GAS_LIMIT'])
tx.sign_transaction(identity_acct)
response = sdk.rpc.send_raw_transaction_pre_exec(tx)
if not isinstance(response, dict):
return list()
result = response.get('Result')
if result is None:
return list()
builder = WasmParamsBuilder(bytes.fromhex(result))
struct_len = builder.read_var_uint()
album_list = list()
for _ in range(struct_len):
try:
encrypted_ipfs_address_bytes = bytes.fromhex(builder.pop_str())
ext = builder.pop_str()
aes_iv = bytes.fromhex(builder.pop_str())
encode_g_tilde = bytes.fromhex(builder.pop_str())
ipfs_address = ECIES.decrypt_with_cbc_mode(
encrypted_ipfs_address_bytes,
identity_acct.get_private_key_bytes(), aes_iv, encode_g_tilde)
album_list.append([ipfs_address.decode('ascii'), ext])
except Exception as e:
print('Decrypt with cbc mode failed: ', e.args[0])
return album_list
def decrypt_with_ont_id_in_cbc(aes_iv: bytes, encode_g_tilde: bytes,
cipher_text: bytes, ont_id_acct: Account):
if not isinstance(ont_id_acct, Account):
return b''
private_key_bytes = ont_id_acct.get_private_key_bytes()
plain_text = ECIES.decrypt_with_cbc_mode(cipher_text,
private_key_bytes, aes_iv,
encode_g_tilde)
return plain_text
def encrypt_with_ont_id_in_cbc(plain_text: bytes, ont_id_acct: Account):
if not isinstance(ont_id_acct, Account):
return b''
private_key_bytes = ont_id_acct.get_private_key_bytes()
public_key_bytes = ECDSA.ec_get_public_key_by_private_key(
private_key_bytes)
aes_iv, encode_g_tilde, cipher_text = ECIES.encrypt_with_cbc_mode(
plain_text, public_key_bytes)
return aes_iv, encode_g_tilde, cipher_text
def test_get_private_key_bytes(self):
hex_private_key = '523c5fcf74823831756f0bcb3634234f10b3beb1c05595058534577752ad2d9f'
account = Account(hex_private_key, SignatureScheme.SHA256withECDSA)
hex_get_private_key_bytes = account.get_private_key_bytes().hex()
self.assertEqual(hex_private_key, hex_get_private_key_bytes)
