dynamodb_encryption_sdk.internal.crypto.jce_bridge.encryption

Cipher resource for JCE bridge.

Warning

No guarantee is provided on the modules and APIs within this namespace staying consistent. Directly reference at your own risk.

Classes

JavaCipher(cipher, mode, padding)

Defines the encryption cipher, mode, and padding type to use for encryption.

class dynamodb_encryption_sdk.internal.crypto.jce_bridge.encryption.JavaCipher(cipher: dynamodb_encryption_sdk.internal.crypto.jce_bridge.primitives.JavaEncryptionAlgorithm, mode: dynamodb_encryption_sdk.internal.crypto.jce_bridge.primitives.JavaMode, padding: dynamodb_encryption_sdk.internal.crypto.jce_bridge.primitives.JavaPadding)[source]

Bases: object

Defines the encryption cipher, mode, and padding type to use for encryption.

https://docs.oracle.com/javase/8/docs/api/javax/crypto/Cipher.html

Parameters

cipher (JavaEncryptionAlgorithm) – Encryption algorithm to use
mode (JavaMode) – Encryption mode to use
padding (JavaPadding) – Encryption padding to use

encrypt(key, data)[source]

Encrypt data using loaded key.

Parameters

key – Key loaded by cipher
data (bytes) – Data to encrypt

Returns

Encrypted data

Return type

bytes

decrypt(key, data)[source]

Decrypt data using loaded key.

Parameters

key – Key loaded by cipher
data (bytes) – Data to decrypt

Returns

Decrypted data

Return type

bytes

wrap(wrapping_key, key_to_wrap)[source]

Wrap key using loaded key.

Parameters

wrapping_key – Key loaded by cipher
key_to_wrap (bytes) – Key to wrap

Returns

Wrapped key

Return type

bytes

unwrap(wrapping_key, wrapped_key)[source]

Wrap key using loaded key.

Parameters

wrapping_key – Key loaded by cipher
wrapped_key (bytes) – Wrapped key

Returns

Unwrapped key

Return type

bytes

property transformation

Returns the Java transformation describing this JavaCipher. https://docs.oracle.com/javase/8/docs/api/javax/crypto/Cipher.html https://docs.oracle.com/javase/8/docs/technotes/guides/security/StandardNames.html#Cipher

Returns: Formatted transformation
Return type: str

classmethod from_transformation(cipher_transformation)[source]

Generates an JavaCipher object from the Java transformation. https://docs.oracle.com/javase/8/docs/api/javax/crypto/Cipher.html https://docs.oracle.com/javase/8/docs/technotes/guides/security/StandardNames.html#Cipher

Parameters: cipher_transformation (str) – Formatted transformation
Returns: JavaCipher instance
Return type: JavaCipher