chacha20_poly1305

Module for ChaCha20-Poly1305 algorithm.

class ChaCha20Poly1305

Bases: object

ChaCha20-Poly1305 class. It decrypts/encrypts data using ChaCha20-Poly1305 algorithm.

static Decrypt(key: Union[bytes, str], nonce: Union[bytes, str], assoc_data: Union[bytes, str], cipher_text: Union[bytes, str], tag: Union[bytes, str]) → bytes

Decrypt data.

Parameters:

• key (str or bytes) – Key

• nonce (str or bytes) – Nonce

• assoc_data (str or bytes) – Associated data

• cipher_text (bytes) – Cipher text

• tag (bytes) – Tag

Returns:

Decrypted data

Return type:

bytes

static Encrypt(key: Union[bytes, str], nonce: Union[bytes, str], assoc_data: Union[bytes, str], plain_text: Union[bytes, str]) → Tuple[bytes, bytes]

Encrypt data.

Parameters:

• key (str or bytes) – Key

• nonce (str or bytes) – Nonce

• assoc_data (str or bytes) – Associated data

• plain_text (str or bytes) – Plain text

Returns:

Cipher text bytes (index 0) and tag bytes (index 1)

Return type:

tuple[bytes, bytes]

static KeySize() → int

Get the key size.

Returns:

Key size

Return type:

int

static TagSize() → int

Get the tag size.

Returns:

Tag size

Return type:

int