Struct PyFernet 

pub struct PyFernet { /* private fields */ }

Fernet symmetric authenticated encryption.

Implements the Fernet specification <https://github.com/fernet/spec/blob/master/Spec.md>_ using AES-128-CBC encryption and HMAC-SHA256 authentication. Tokens produced by this class are byte-for-byte compatible with those produced by cryptography.fernet.Fernet.

Key format: a URL-safe base64-encoded string of 32 raw bytes, where the first 16 bytes are the signing key and the last 16 bytes are the encryption key.

Token format (before base64url encoding):

• 1 byte: version (0x80)
• 8 bytes: timestamp (big-endian unsigned 64-bit Unix seconds)
• 16 bytes: AES-CBC initialization vector
• N bytes: AES-128-CBC ciphertext (PKCS#7-padded plaintext)
• 32 bytes: HMAC-SHA256 of all preceding bytes

import synta

key   = synta.Fernet.generate_key()
fern  = synta.Fernet(key)
token = fern.encrypt(b"secret data")
plain = fern.decrypt(token)
assert plain == b"secret data"

# TTL check (seconds):
plain = fern.decrypt(token, ttl=300)

Trait Implementations

impl DerefToPyAny for PyFernet

impl ExtractPyClassWithClone for PyFernet

impl<'py> IntoPyObject<'py> for PyFernet

type Target = PyFernet

The Python output type

type Output = Bound<'py, <PyFernet as IntoPyObject<'py>>::Target>

The smart pointer type to use.

type Error = PyErr

The type returned in the event of a conversion error.

fn into_pyobject( self, py: Python<'py>, ) -> Result<<Self as IntoPyObject<'_>>::Output, <Self as IntoPyObject<'_>>::Error>

Performs the conversion.

impl PyClass for PyFernet

type Frozen = True

Whether the pyclass is frozen.

impl PyClassImpl for PyFernet

const IS_BASETYPE: bool = false

#[pyclass(subclass)]

const IS_SUBCLASS: bool = false

#[pyclass(extends=…)]

const IS_MAPPING: bool = false

#[pyclass(mapping)]

const IS_SEQUENCE: bool = false

#[pyclass(sequence)]

const IS_IMMUTABLE_TYPE: bool = false

#[pyclass(immutable_type)]

const RAW_DOC: &'static CStr = /// Fernet symmetric authenticated encryption. /// /// Implements the `Fernet specification <https://github.com/fernet/spec/blob/master/Spec.md>`_ /// using AES-128-CBC encryption and HMAC-SHA256 authentication. Tokens /// produced by this class are byte-for-byte compatible with those produced /// by ``cryptography.fernet.Fernet``. /// /// **Key format:** a URL-safe base64-encoded string of 32 raw bytes, where /// the first 16 bytes are the signing key and the last 16 bytes are the /// encryption key. /// /// **Token format (before base64url encoding):** /// /// * 1 byte: version (``0x80``) /// * 8 bytes: timestamp (big-endian unsigned 64-bit Unix seconds) /// * 16 bytes: AES-CBC initialization vector /// * N bytes: AES-128-CBC ciphertext (PKCS#7-padded plaintext) /// * 32 bytes: HMAC-SHA256 of all preceding bytes /// /// ```python,ignore /// import synta /// /// key = synta.Fernet.generate_key() /// fern = synta.Fernet(key) /// token = fern.encrypt(b"secret data") /// plain = fern.decrypt(token) /// assert plain == b"secret data" /// /// # TTL check (seconds): /// plain = fern.decrypt(token, ttl=300) /// ```

Docstring for the class provided on the struct or enum.

const DOC: &'static CStr

Fully rendered class doc, including the text_signature if a constructor is defined.

type BaseType = PyAny

Base class

type ThreadChecker = SendablePyClass<PyFernet>

This handles following two situations:

type PyClassMutability = <<PyAny as PyClassBaseType>::PyClassMutability as PyClassMutability>::ImmutableChild

Immutable or mutable

type Dict = PyClassDummySlot

Specify this class has #[pyclass(dict)] or not.

type WeakRef = PyClassDummySlot

Specify this class has #[pyclass(weakref)] or not.

type BaseNativeType = PyAny

The closest native ancestor. This is PyAny by default, and when you declare #[pyclass(extends=PyDict)], it’s PyDict.

fn items_iter() -> PyClassItemsIter

fn lazy_type_object() -> &'static LazyTypeObject<Self>

fn dict_offset() -> Option<isize>

fn weaklist_offset() -> Option<isize>

impl PyClassNewTextSignature for PyFernet

const TEXT_SIGNATURE: &'static str = "(key)"

impl PyMethods<PyFernet> for PyClassImplCollector<PyFernet>

fn py_methods(self) -> &'static PyClassItems

impl PyTypeInfo for PyFernet

const NAME: &'static str = "Fernet"

Class name.

const MODULE: Option<&'static str> = ::core::option::Option::None

Module name, if any.

fn type_object_raw(py: Python<'_>) -> *mut PyTypeObject

Returns the PyTypeObject instance for this type.

fn type_object(py: Python<'_>) -> Bound<'_, PyType>

Returns the safe abstraction over the type object.

fn is_type_of(object: &Bound<'_, PyAny>) -> bool

Checks if object is an instance of this type or a subclass of this type.

fn is_exact_type_of(object: &Bound<'_, PyAny>) -> bool

Checks if object is an instance of this type.