Tools related to asymmetric ciphers¶

Tools for asymmetric ciphers common to all the backends.

class pyflocker.ciphers.backends.asymmetric.MGF1(hashfunc: BaseHash = <factory>)[source]

Bases: BaseMGF

Mask Generation Function.

Parameters:: hashfunc – A BaseHash object. Defaults to ‘sha256’.

hashfunc: BaseHash

class pyflocker.ciphers.backends.asymmetric.OAEP(mgf: BaseMGF = <factory>, hashfunc: BaseHash = <factory>, label: bytes | None = None)[source]

Bases: BaseAsymmetricPadding

PKCS#1 OAEP is an asymmetric cipher based on RSA and OAEP padding. It can encrypt messages slightly shorter than RSA modulus.

Parameters:

mgf – Mask Generation Function. Defaults to MGF1.
hashfunc – A BaseHash object. Defaults to ‘sha256’. Can be created from interfaces.Hash.new() function.
label – A label to apply to this encryption. Defaults to None.

mgf: BaseMGF

hashfunc: BaseHash

label: bytes | None = None

name: ClassVar[str] = 'OAEP'

class pyflocker.ciphers.backends.asymmetric.PSS(mgf: ~pyflocker.ciphers.base.BaseMGF = <factory>, salt_length: int | None = None)[source]

Bases: BaseAsymmetricPadding

Probabilistic Digital Signature Scheme.

Parameters:

mgf – A Mask Generation Function. Defaults to MGF1.
salt_length – Length of the salt, in bytes. It must be greater than 0. Defaults to None.

mgf: BaseMGF

salt_length: int | None = None

name: ClassVar[str] = 'PSS'

class pyflocker.ciphers.backends.asymmetric.ECDSA[source]

Bases: BaseEllepticCurveSignatureAlgorithm

Elleptic Curve Digital Signature Algorithm.

class pyflocker.ciphers.backends.asymmetric.ECDH[source]

Bases: BaseEllepticCurveExchangeAlgorithm

Elleptic Curve Diffie Hellmann Algorithm.

class pyflocker.ciphers.backends.asymmetric.EdDSA(mode: str = 'rfc8032', context: bytes | None = None)[source]

Bases: BaseEllepticCurveSignatureAlgorithm

Edwards-curve Digital Signature Algorithm.

Parameters:

mode – A string that is currently equal to "rfc8032".
context – Up to 255 bytes of context, which is a constant byte string to segregate different protocols or different applications of the same key.

mode: str = 'rfc8032'

context: bytes | None = None