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dd|¦ « ‰ _ |‰ _ dS )a Initialize this PKCS#1 OAEP cipher object.
:Parameters:
key : an RSA key object
If a private half is given, both encryption and decryption are possible.
If a public half is given, only encryption is possible.
hashAlgo : hash object
The hash function to use. This can be a module under `Crypto.Hash`
or an existing hash object created from any of such modules. If not specified,
`Crypto.Hash.SHA1` is used.
mgfunc : callable
A mask generation function that accepts two parameters: a string to
use as seed, and the lenth of the mask to generate, in bytes.
If not specified, the standard MGF1 consistent with ``hashAlgo`` is used (a safe choice).
label : bytes/bytearray/memoryview
A label to apply to this particular encryption. If not specified,
an empty string is used. Specifying a label does not improve
security.
randfunc : callable
A function that returns random bytes.
:attention: Modify the mask generation function only if you know what you are doing.
Sender and receiver must use the same one.
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:param message:
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minus 2, minus twice the hash output size.
For instance, if you use RSA 2048 and SHA-256, the longest message
you can encrypt is 190 byte long.
:type message: bytes/bytearray/memoryview
:returns: The ciphertext, as large as the RSA modulus.
:rtype: bytes
:raises ValueError:
if the message is too long.
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:param ciphertext: The encrypted message.
:type ciphertext: bytes/bytearray/memoryview
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:raises ValueError:
if the ciphertext has the wrong length, or if decryption
fails the integrity check (in which case, the decryption
key is probably wrong).
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if the RSA key has no private half (i.e. you are trying
to decrypt using a public key).
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__module__Ú __qualname__Ú__doc__r" r$ r( rK rW © r r r r sk € € € € € ð8ð 8ð&"ð &"ð &"ðP'ð 'ð 'ð 'ð 'ð 'ð 4ð 4ð 4ðl< ð < ð < ð < ð < r r r c óD — |€ t j }t | ||||¦ « S )a› Return a cipher object :class:`PKCS1OAEP_Cipher` that can be used to perform PKCS#1 OAEP encryption or decryption.
:param key:
The key object to use to encrypt or decrypt the message.
Decryption is only possible with a private RSA key.
:type key: RSA key object
:param hashAlgo:
The hash function to use. This can be a module under `Crypto.Hash`
or an existing hash object created from any of such modules.
If not specified, `Crypto.Hash.SHA1` is used.
:type hashAlgo: hash object
:param mgfunc:
A mask generation function that accepts two parameters: a string to
use as seed, and the lenth of the mask to generate, in bytes.
If not specified, the standard MGF1 consistent with ``hashAlgo`` is used (a safe choice).
:type mgfunc: callable
:param label:
A label to apply to this particular encryption. If not specified,
an empty string is used. Specifying a label does not improve
security.
:type label: bytes/bytearray/memoryview
:param randfunc:
A function that returns random bytes.
The default is `Random.get_random_bytes`.
:type randfunc: callable
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