smaheshwar-pltr commented on code in PR #49667:
URL: https://github.com/apache/arrow/pull/49667#discussion_r3053583787
##########
python/pyarrow/_parquet_encryption.pyx:
##########
@@ -711,3 +711,186 @@ cdef shared_ptr[CDecryptionConfiguration]
pyarrow_unwrap_decryptionconfig(object
if isinstance(decryptionconfig, DecryptionConfiguration):
return (<DecryptionConfiguration> decryptionconfig).unwrap()
raise TypeError("Expected DecryptionConfiguration, got %s" %
type(decryptionconfig))
+
+
+def create_decryption_properties(
+ footer_key,
+ *,
+ aad_prefix=None,
+ bint check_footer_integrity=True,
+ bint allow_plaintext_files=False,
+):
+ """
+ Create FileDecryptionProperties using a direct footer key.
+
+ This bypasses the KMS-based :class:`CryptoFactory` API and directly
+ constructs decryption properties from a plaintext key. This is useful
+ when the caller manages key wrapping externally (e.g. via an
+ application-level envelope encryption scheme).
+
+ For most use cases, prefer the higher-level :class:`CryptoFactory`
+ with :class:`DecryptionConfiguration`, which handles envelope
+ encryption and key rotation automatically.
Review Comment:
Per https://github.com/apache/arrow/issues/47435#issuecomment-3240985817,
adding this documentation
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