src.crypto

Generic functions for the cryptographic primitives used in this project.

Functions

get_hasher()

Returns a object that you can use for hashing, compatible to the hashlib interface.

Classes

Signing(byte_repr)

Functionality for creating and verifying signatures, and their public/private keys.

src.crypto.get_hasher()

Returns a object that you can use for hashing, compatible to the hashlib interface.

class src.crypto.Signing(byte_repr)

Functionality for creating and verifying signatures, and their public/private keys.

Parameters:byte_repr (bytes) – The bytes serialization of a public key.

as_bytes(include_priv=False)

Serialize this key to a bytes value.

Return type:bytes

classmethod from_file(path)

Reads a private or public key from the file at path.

classmethod from_json_compatible(obj)

Creates a new object of this class, from a JSON-serializable representation.

classmethod generate_private_key()

Generate a new private key.

has_private

Returns a bool value indicating whether this instance has a private key that can be used to sign things.

classmethod read_many_private(file_contents)

Reads many private keys from the (binary) contents of a file written with write_many_private.

Return type:Iterator

sign(hashed_value)

Sign a hashed value with this private key.

Return type:bytes

to_json_compatible()

Returns a JSON-serializable representation of this object.

verify_sign(hashed_value, signature)

Verify a signature for an already hashed value and a public key.

Return type:bool

static write_many_private(keys)

Writes the private keys in keys to the file at path.

src.crypto.MAX_HASH = 13407807929942597099574024998205846127479365820592393377723561443721764030073546976801874298166903427690031858186486050853753882811946569946433649006084095

The largest possible hash value, when interpreted as an unsigned int.