decrypt_asymmetric

decrypt_asymmetric

Functions

Name	Description
decrypt_asymmetric	Decrypts a message using the receiver’s private key and verifies the

decrypt_asymmetric

decrypt_asymmetric.decrypt_asymmetric(
    encrypted_data,
    receiver_private_key,
    sender_public_key,
)

Decrypts a message using the receiver’s private key and verifies the signature using the sender’s public key. This ensures both confidentiality (only receiver can decrypt) and authenticity (verifies sender identity).

Parameters

Name	Type	Description	Default
encrypted_data	str	Base64-encoded JSON containing encrypted message and signature.	required
receiver_private_key	bytes or str	The receiver’s RSA private key in PEM format (bytes) or path to key file (str).	required
sender_public_key	bytes or str	The sender’s RSA public key in PEM format (bytes) or path to key file (str) for signature verification.	required

Returns

Name	Type	Description
	str	The decrypted and verified plaintext message.

Raises

Name	Type	Description
	ValueError	If decryption fails, signature verification fails, or keys are invalid.

Examples

>>> from imitation_game.generate_asymmetric_key import generate_asymmetric_key
>>> from imitation_game.encrypt_asymmetric import encrypt_asymmetric
>>> from imitation_game.decrypt_asymmetric import decrypt_asymmetric
>>> receiver_public, receiver_private = generate_asymmetric_key()
>>> sender_public, sender_private = generate_asymmetric_key()
>>> encrypted = encrypt_asymmetric(
...     "Hello, world!",
...     receiver_public,
...     sender_private,
... )
>>> decrypt_asymmetric(encrypted, receiver_private, sender_public)
'Hello, world!'