aws_encryption_sdk.caches.null

Null cache: a cache which does not cache.

Classes

NullCryptoMaterialsCache Null cache: a cache which does not cache.
class aws_encryption_sdk.caches.null.NullCryptoMaterialsCache

Bases: aws_encryption_sdk.caches.base.CryptoMaterialsCache

Null cache: a cache which does not cache.

New in version 1.3.0.

put_encryption_materials(cache_key, encryption_materials, plaintext_length, entry_hints=None)

Does not add encryption materials to the cache since there is no cache to which to add them.

Parameters:
  • cache_key (bytes) – Identifier for entries in cache
  • encryption_materials (aws_encryption_sdk.materials_managers.EncryptionMaterials) – Encryption materials to add to cache
  • plaintext_length (int) – Length of plaintext associated with this request to the cache
  • entry_hints (aws_encryption_sdk.caches.CryptoCacheEntryHints) – Metadata to associate with entry (optional)
Return type:

aws_encryption_sdk.caches.CryptoMaterialsCacheEntry

put_decryption_materials(cache_key, decryption_materials)

Does not add decryption materials to the cache since there is no cache to which to add them.

Parameters:
Return type:

aws_encryption_sdk.caches.CryptoMaterialsCacheEntry

get_encryption_materials(cache_key, plaintext_length)

Always raises a CacheKeyError.

Parameters:
  • cache_key (bytes) – Cache ID for which to locate cache entries
  • plaintext_length (int) – Bytes to be encrypted by the encryption materials
Return type:

aws_encryption_sdk.caches.CryptoCacheEntry

Raises:

CacheKeyError – when called

get_decryption_materials(cache_key)

Always raises a CacheKeyError.

Parameters:cache_key (bytes) – Cache ID for which to locate cache entries
Return type:aws_encryption_sdk.caches.CryptoCacheEntry
Raises:CacheKeyError – when called