Add typing to sse.py

Signed-off-by: Bala.FA <bala@minio.io>

.github/workflows/ci.yml

@@ -30,11 +30,11 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11"]
+        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11", "3.12"]
         os: [ubuntu-latest, windows-latest, macos-latest]
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Run spell check on Ubuntu
       if: matrix.os == 'ubuntu-latest'
       uses: codespell-project/actions-codespell@master
@@ -59,7 +59,7 @@ jobs:
         echo "/Users/runner/.local/bin" >> $GITHUB_PATH
     - name: Run unit tests
       run: |
-        python setup.py install
+        pip install
         pytest
     - name: Run functional tests on Ubuntu
       if: matrix.os == 'ubuntu-latest'

minio/sse.py

@@ -34,22 +34,22 @@ class Sse:
     __metaclass__ = ABCMeta
 
     @abstractmethod
-    def headers(self):
+    def headers(self) -> dict[str, str]:
         """Return headers."""
 
-    def tls_required(self):  # pylint: disable=no-self-use
+    def tls_required(self) -> bool:  # pylint: disable=no-self-use
         """Return TLS required to use this server-side encryption."""
         return True
 
-    def copy_headers(self):  # pylint: disable=no-self-use
+    def copy_headers(self) -> dict[str, str]:  # pylint: disable=no-self-use
         """Return copy headers."""
         return {}
 
 
 class SseCustomerKey(Sse):
     """ Server-side encryption - customer key type."""
 
-    def __init__(self, key):
+    def __init__(self, key: bytes):
         if len(key) != 32:
             raise ValueError(
                 "SSE-C keys need to be 256 bit base64 encoded",
@@ -71,17 +71,17 @@ def __init__(self, key):
             md5key,
         }
 
-    def headers(self):
+    def headers(self) -> dict[str, str]:
         return self._headers.copy()
 
-    def copy_headers(self):
+    def copy_headers(self) -> dict[str, str]:
         return self._copy_headers.copy()
 
 
 class SseKMS(Sse):
     """Server-side encryption - KMS type."""
 
-    def __init__(self, key, context):
+    def __init__(self, key: str, context: dict):
         self._headers = {
             "X-Amz-Server-Side-Encryption-Aws-Kms-Key-Id": key,
             "X-Amz-Server-Side-Encryption": "aws:kms"
@@ -92,17 +92,17 @@ def __init__(self, key, context):
                 base64.b64encode(data).decode()
             )
 
-    def headers(self):
+    def headers(self) -> dict[str, str]:
         return self._headers.copy()
 
 
 class SseS3(Sse):
     """Server-side encryption - S3 type."""
 
-    def headers(self):
+    def headers(self) -> dict[str, str]:
         return {
             "X-Amz-Server-Side-Encryption": "AES256"
         }
 
-    def tls_required(self):
+    def tls_required(self) -> bool:
         return False