encrypt_asymmetric

encrypt_asymmetric

Functions

Name	Description
encrypt_asymmetric	Encrypts a message using the receiver’s public key and signs it with the

encrypt_asymmetric

encrypt_asymmetric.encrypt_asymmetric(
    message,
    receiver_public_key,
    sender_private_key,
)

Encrypts a message using the receiver’s public key and signs it with the sender’s private key. This ensures both confidentiality (only receiver can decrypt) and authenticity (receiver can verify sender).

Parameters

Name	Type	Description	Default
message	str	The plaintext message to encrypt.	required
receiver_public_key	bytes or str	The receiver’s RSA public key in PEM format (bytes) or path to key file (str).	required
sender_private_key	bytes or str	The sender’s RSA private key in PEM format (bytes) or path to key file (str) for signing.	required

Returns

Name	Type	Description
	str	Base64-encoded JSON containing encrypted message and signature.

Raises

Name	Type	Description
	ValueError	If the message is too long for RSA encryption or keys are invalid.

Examples

>>> from imitation_game.generate_asymmetric_key import generate_asymmetric_key
>>> from imitation_game.encrypt_asymmetric import encrypt_asymmetric
>>> receiver_public, _ = generate_asymmetric_key()
>>> _, sender_private = generate_asymmetric_key()
>>> encrypted = encrypt_asymmetric(
...     "Hello, world!",
...     receiver_public,
...     sender_private,
... )