fix: usage of hashlib for FIPS (#1512)

fix usage of hashlib for FIPS

Signed-off-by: Michele Dolfi <dol@zurich.ibm.com>

docling/document_converter.py

@@ -189,7 +189,9 @@ class DocumentConverter:
     def _get_pipeline_options_hash(self, pipeline_options: PipelineOptions) -> str:
         """Generate a hash of pipeline options to use as part of the cache key."""
         options_str = str(pipeline_options.model_dump())
-        return hashlib.md5(options_str.encode("utf-8")).hexdigest()
+        return hashlib.md5(
+            options_str.encode("utf-8"), usedforsecurity=False
+        ).hexdigest()
 
     def initialize_pipeline(self, format: InputFormat):
         """Initialize the conversion pipeline for the selected format."""

docling/utils/utils.py

@@ -20,7 +20,7 @@ def create_file_hash(path_or_stream: Union[BytesIO, Path]) -> str:
     """Create a stable page_hash of the path_or_stream of a file"""
 
     block_size = 65536
-    hasher = hashlib.sha256()
+    hasher = hashlib.sha256(usedforsecurity=False)
 
     def _hash_buf(binary_stream):
         buf = binary_stream.read(block_size)  # read and page_hash in chunks
@@ -38,7 +38,7 @@ def create_file_hash(path_or_stream: Union[BytesIO, Path]) -> str:
 
 
 def create_hash(string: str):
-    hasher = hashlib.sha256()
+    hasher = hashlib.sha256(usedforsecurity=False)
     hasher.update(string.encode("utf-8"))
 
     return hasher.hexdigest()