dfvfs.encryption package

Submodules

dfvfs.encryption.aes_decrypter module

The AES decrypter implementation.

class dfvfs.encryption.aes_decrypter.AESDecrypter(cipher_mode=None, initialization_vector=None, key=None, **kwargs)[source]

Bases: CryptographyBlockCipherDecrypter

AES decrypter using Cryptography.

ENCRYPTION_METHOD = 'aes'

dfvfs.encryption.blowfish_decrypter module

The Blowfish decrypter implementation.

class dfvfs.encryption.blowfish_decrypter.BlowfishDecrypter(cipher_mode=None, initialization_vector=None, key=None, **kwargs)[source]

Bases: CryptographyBlockCipherDecrypter

Blowfish decrypter using Cryptography.

ENCRYPTION_METHOD = 'blowfish'

dfvfs.encryption.decrypter module

The decrypter interface.

class dfvfs.encryption.decrypter.CryptographyBlockCipherDecrypter(algorithm=None, cipher_mode=None, initialization_vector=None, **kwargs)[source]

Bases: Decrypter

Block cipher decrypter using Cryptography.

Decrypt(encrypted_data, finalize=False)[source]

Decrypts the encrypted data.

Parameters

encrypted_data (bytes) – encrypted data.
finalize (Optional[bool]) – True if the end of data has been reached and the cipher context should be finalized.

Returns

decrypted data and remaining encrypted data.

Return type

tuple[bytes, bytes]

class dfvfs.encryption.decrypter.Decrypter(**kwargs)[source]

Bases: object

Decrypter interface.

abstract Decrypt(encrypted_data, finalize=False)[source]

Decrypts the encrypted data.

Parameters

encrypted_data (bytes) – encrypted data.
finalize (Optional[bool]) – True if the end of data has been reached and the cipher context should be finalized.

Returns

decrypted data and remaining encrypted data.

Return type

tuple[bytes, bytes]

dfvfs.encryption.des3_decrypter module

The triple DES decrypter implementation.

class dfvfs.encryption.des3_decrypter.DES3Decrypter(cipher_mode=None, initialization_vector=None, key=None, **kwargs)[source]

Bases: CryptographyBlockCipherDecrypter

Triple DES decrypter using Cryptography.

ENCRYPTION_METHOD = 'des3'

dfvfs.encryption.manager module

The encryption manager.

class dfvfs.encryption.manager.EncryptionManager[source]

Bases: object

Encryption manager.

classmethod DeregisterDecrypter(decrypter)[source]

Deregisters a decrypter for a specific encryption method.

Parameters: decrypter (type) – decrypter class.
Raises: KeyError – if the corresponding decrypter is not set.

classmethod GetDecrypter(encryption_method, **kwargs)[source]

Retrieves the decrypter object for a specific encryption method.

Parameters

encryption_method (str) – encryption method identifier.
kwargs (dict) – keyword arguments depending on the decrypter.

Returns

decrypter or None if the encryption method does not exists.

Return type

Decrypter

Raises

CredentialError – if the necessary credentials are missing.

classmethod RegisterDecrypter(decrypter)[source]

Registers a decrypter for a specific encryption method.

Parameters: decrypter (type) – decrypter class.
Raises: KeyError – if the corresponding decrypter is already set.

classmethod RegisterDecrypters(decrypters)[source]

Registers decrypters.

The decrypters are identified based on their lower case encryption method.

Parameters: decrypters (list[type]) – decrypter classes.
Raises: KeyError – if decrypters is already set for the corresponding encryption method.

dfvfs.encryption.rc4_decrypter module

The RC4 decrypter implementation.

class dfvfs.encryption.rc4_decrypter.RC4Decrypter(key=None, **kwargs)[source]

Bases: Decrypter

RC4 decrypter using Cryptography.

Decrypt(encrypted_data, finalize=False)[source]

Decrypts the encrypted data.

Parameters

encrypted_data (bytes) – encrypted data.
finalize (Optional[bool]) – True if the end of data has been reached and the cipher context should be finalized.

Returns

decrypted data and remaining encrypted data.

Return type

tuple[bytes,bytes]

ENCRYPTION_METHOD = 'rc4'

Module contents

Imports for the encryption manager.