diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..e928de1
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,4 @@
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
\ No newline at end of file
diff --git a/cas_wrapper.py b/cas_wrapper.py
index 8533dc9..512a923 100644
--- a/cas_wrapper.py
+++ b/cas_wrapper.py
@@ -1,5 +1,7 @@
+from concurrent.futures import ThreadPoolExecutor, as_completed
 import json
-from typing import Dict
+import logging
+import typing
 
 from plumbum import local, ProcessExecutionError
 
@@ -16,6 +18,7 @@ class CasWrapper:
             self,
             cas_api_key: str,
             cas_signer_id: str,
+            logger: logging.Logger = None,
     ):
         if self.binary_name not in local:
             raise FileNotFoundError(
@@ -23,17 +26,22 @@ class CasWrapper:
             )
         self._cas_api_key = cas_api_key
         self._cas_signer_id = cas_signer_id
+        self._cas = local['cas']
+        self._logger = logger
+        if self._logger is None:
+            self._logger = logging.getLogger()
+
+    def ensure_login(self):
         with local.env(
-                CAS_API_KEY=self._cas_api_key,
-                SIGNER_ID=self._cas_signer_id
+            CAS_API_KEY=self._cas_api_key,
+            SIGNER_ID=self._cas_signer_id,
         ):
-            self._cas = local['cas']
             self._cas['login']()
 
     def notarize(
             self,
             local_path: str,
-            metadata: Dict = None,
+            metadata: typing.Dict = None,
     ) -> str:
         """
         Wrapper around `cas notarize`
@@ -64,21 +72,25 @@ class CasWrapper:
     def authenticate(
             self,
             local_path: str,
+            return_json: bool = False,
+            use_hash: bool = False,
     ):
         """
         Wrapper around `cas authenticate`
         :param local_path: path to a local Git repo
                (should be started from `git://`)
-               or to a single local file
+               or to a single local file or hash
+        :param return_json: flag for return json response
+        :param use_hash: flag for authenticate by hash
         :return: true if a commit is trusted, vice versa - false
-        :rtype: bool
+                 or dict with result if return_json param is True
+        :rtype: bool or dict
         """
-        command = self._cas[
-            'authenticate',
-            local_path,
-            '-o',
-            'json',
-        ]
+        command_args = ['authenticate', local_path]
+        if use_hash:
+            command_args = ['authenticate', '--hash', local_path]
+        command_args.extend(('-o', 'json'))
+        command = self._cas[command_args]
         try:
             with local.env(
                     CAS_API_KEY=self._cas_api_key,
@@ -92,4 +104,81 @@ class CasWrapper:
             ):
                 # in case if commit is untrusted
                 result_of_execution = command(retcode=1)
-        return not bool(json.loads(result_of_execution)['status'])
+        json_result = json.loads(result_of_execution)
+        if return_json:
+            return json_result
+        return not bool(json_result['status'])
+
+    def authenticate_source(
+        self,
+        local_path: str,
+    ) -> typing.Tuple[bool, typing.Optional[str]]:
+        """
+        Authenticates source by git path.
+        Returns authenticate result and source commit hash.
+        """
+        is_authenticated = False
+        commit_cas_hash = None
+        self.ensure_login()
+        try:
+            result_json = self.authenticate(local_path, return_json=True)
+            is_authenticated = result_json['verified']
+            commit_cas_hash = result_json['hash']
+        # we can fall with ProcessExecutionError,
+        # because source can be not notarized
+        except ProcessExecutionError:
+            self._logger.exception('Cannot authenticate: %s', local_path)
+        return is_authenticated, commit_cas_hash
+
+    def authenticate_artifact(
+        self,
+        local_path: str,
+        use_hash: bool = False,
+    ) -> bool:
+        """
+        Authenticates artifact by artifact path or hash if `use_hash` is True.
+        Returns authenticate result.
+        """
+        is_authenticated = False
+        self.ensure_login()
+        try:
+            is_authenticated = self.authenticate(
+                local_path,
+                use_hash=use_hash,
+                return_json=True,
+            )['verified']
+        # we can fall with ProcessExecutionError,
+        # because artifact can be not notarized
+        except ProcessExecutionError:
+            self._logger.exception('Cannot authenticate: %s', local_path)
+        return is_authenticated
+
+    def notarize_artifacts(
+        self,
+        artifact_paths: typing.List[str],
+        metadata: typing.Dict[str, typing.Any],
+    ) -> typing.Tuple[bool, typing.Dict[str, str]]:
+        """
+        Notarize artifacts by their paths.
+        Returns `True` if all artifacts was succesful notarizated
+        and dict with CAS hashes.
+        """
+        all_artifacts_is_notarized = True
+        notarized_artifacts = {}
+        self.ensure_login()
+        with ThreadPoolExecutor(max_workers=4) as executor:
+            futures = {
+                executor.submit(self.notarize, artifact_path, metadata): artifact_path
+                for artifact_path in artifact_paths
+            }
+            for future in as_completed(futures):
+                artifact_path = futures[future]
+                try:
+                    cas_artifact_hash = future.result()
+                except Exception:
+                    self._logger.exception('Cannot notarize artifact: %s',
+                                           artifact_path)
+                    all_artifacts_is_notarized = False
+                    continue
+                notarized_artifacts[artifact_path] = cas_artifact_hash
+        return all_artifacts_is_notarized, notarized_artifacts
diff --git a/setup.py b/setup.py
index d7c772d..f19dd49 100644
--- a/setup.py
+++ b/setup.py
@@ -2,7 +2,7 @@ from setuptools import setup
 
 setup(
     name="cas_wrapper",
-    version="0.0.1",
+    version="0.0.2",
     author="Stepan Oksanichenko",
     author_email="soksanichenko@almalinux.org",
     description="The python wrapper around binary cas from "