[GHA] Store sha-256 checksums for artifacts

Signed-off-by: Alina Kladieva <alina.kladieva@intel.com>

.github/actions/store_artifacts/store_artifacts.py

@@ -4,6 +4,7 @@
 from __future__ import annotations
 
 import argparse
+import hashlib
 import logging
 import os
 import sys
@@ -62,6 +63,33 @@ def rotate_dir(directory: Path) -> bool:
     return True
 
 
+def generate_sha256sum(file_path: str | Path) -> str:
+    """
+    Generates the SHA-256 checksum for the given file.
+
+    :param file_path: Path to the file
+    :return: SHA-256 checksum as a hexadecimal string
+    """
+    sha256 = hashlib.sha256()
+    with open(file_path, 'rb') as file:
+        for chunk in iter(lambda: file.read(4096), b''):
+            sha256.update(chunk)
+    return sha256.hexdigest()
+
+
+def store_checksums(artifact_path: Path) -> None:
+    """
+    Generates SHA-256 checksums for a given artifact and stores them in separate files.
+
+    :param artifact_path: Path to either a single artifact file or the directory with files to generate checksums for
+    """
+    files = [path for path in artifact_path.rglob('*') if path.is_file] if artifact_path.is_dir() else [artifact_path]
+    for file in files:
+        hashsum_filepath = file.with_suffix('.sha256')
+        with open(hashsum_filepath, 'w') as hashsum_file:
+            hashsum_file.write(generate_sha256sum(file))
+
+
 def main():
     action_utils.init_logger()
     logger = logging.getLogger(__name__)
@@ -79,6 +107,14 @@ def main():
     error_found = False
     for artifact in args.artifacts.split():
         artifact_path = Path(artifact)
+
+        logger.debug(f"Calculating checksum for {artifact_path}")
+        try:
+            store_checksums(artifact_path)
+        except Exception as e:
+            logger.error(f'Failed to calculate checksum for {artifact}: {e}')
+            error_found = True
+
         logger.debug(f"Copying {artifact_path} to {storage / artifact_path.name}")
         try:
             with preserve_stats_context():
@@ -87,6 +123,9 @@ def main():
                 else:
                     storage.mkdir(parents=True, exist_ok=True)
                     shutil.copy2(artifact_path, storage / artifact_path.name)
+                    if artifact_path.with_suffix('.sha256').exists():
+                        shutil.copy2(artifact_path.with_suffix('.sha256'),
+                                     storage / artifact_path.with_suffix('.sha256').name)
         except Exception as e:
             logger.error(f'Failed to copy {artifact}: {e}')
             error_found = True