B ?[@s.dZddlZddlZddlTGdddZdS)z$Id$N)*c@seZdZdZddZddZddZdd Zd d Zd d Z ddZ ddZ ddZ ddZ ddZddZddZddZddZd d!Zd"d#Zd$d%Zd&S)'pubkeyzxAn abstract class for a public key object. :undocumented: __getstate__, __setstate__, __eq__, __ne__, validate cCsdS)N)selfrr6lib/python3.7/site-packages/Crypto/PublicKey/pubkey.py__init__&szpubkey.__init__cCs2|j}x&|jD]}||krt||||<qW|S)zTo keep key objects platform-independent, the key data is converted to standard Python long integers before being written out. It will then be reconverted as necessary on restoration.)__dict__keydataint)rdkeyrrr __getstate__)s  zpubkey.__getstate__cCs.x(|jD]}||krt|||j|<qWdS)zOn unpickling a key object, the key data is converted to the big number representation being used, whether that is Python long integers, MPZ objects, or whatever.N)r Zbignumr)rr r rrr __setstate__3s zpubkey.__setstate__cCsRd}t|trt|}d}t|tr,t|}|||}|rJttt|S|SdS)ajEncrypt a piece of data. :Parameter plaintext: The piece of data to encrypt. :Type plaintext: byte string or long :Parameter K: A random parameter required by some algorithms :Type K: byte string or long :Return: A tuple with two items. Each item is of the same type as the plaintext (string or long). rN) isinstancebytes bytes_to_longZ_encrypttuplemap long_to_bytes)r plaintextK wasString ciphertextrrrencrypt:s    zpubkey.encryptcCsRd}t|ts|f}t|dtr4ttt|}d}||}|rJt|S|SdS)a.Decrypt a piece of data. :Parameter ciphertext: The piece of data to decrypt. :Type ciphertext: byte string, long or a 2-item tuple as returned by `encrypt` :Return: A byte string if ciphertext was a byte string or a tuple of byte strings. A long otherwise. rrN)rrrrrZ_decryptr)rrrrrrrdecryptOs   zpubkey.decryptcCs@|stdt|tr"t|}t|tr4t|}|||S)a Sign a piece of data. :Parameter M: The piece of data to encrypt. :Type M: byte string or long :Parameter K: A random parameter required by some algorithms :Type K: byte string or long :Return: A tuple with two items. z(Private key not available in this object) has_private TypeErrorrrrZ_sign)rMrrrrsignas   z pubkey.signcCst|trt|}|||S)a>Verify the validity of a signature. :Parameter M: The expected message. :Type M: byte string or long :Parameter signature: The signature to verify. :Type signature: tuple with two items, as return by `sign` :Return: True if the signature is correct, False otherwise. )rrrZ_verify)rr signaturerrrverifyrs z pubkey.verifycCstdtdS)Nz0validate() method name is obsolete; use verify())warningswarnDeprecationWarning)rrr rrrvalidateszpubkey.validatecCsLd}t|trt|}d}t|tr,t|}|||}|rDt|S|SdS)a&Blind a message to prevent certain side-channel attacks. :Parameter M: The message to blind. :Type M: byte string or long :Parameter B: Blinding factor. :Type B: byte string or long :Return: A byte string if M was so. A long otherwise. rrN)rrrZ_blindr)rrBrZblindedmessagerrrblinds    z pubkey.blindcCsLd}t|trt|}d}t|tr,t|}|||}|rDt|S|SdS)zUnblind a message after cryptographic processing. :Parameter M: The encoded message to unblind. :Type M: byte string or long :Parameter B: Blinding factor. :Type B: byte string or long rrN)rrrZ_unblindr)rrr&rZunblindedmessagerrrunblinds    zpubkey.unblindcCsdS)a(Tell if the algorithm can deal with cryptographic signatures. This property concerns the *algorithm*, not the key itself. It may happen that this particular key object hasn't got the private information required to generate a signature. :Return: boolean rr)rrrrcan_signs zpubkey.can_signcCsdS)aTell if the algorithm can deal with data encryption. This property concerns the *algorithm*, not the key itself. It may happen that this particular key object hasn't got the private information required to decrypt data. :Return: boolean rr)rrrr can_encrypts zpubkey.can_encryptcCsdS)aTell if the algorithm can deal with data blinding. This property concerns the *algorithm*, not the key itself. It may happen that this particular key object hasn't got the private information required carry out blinding. :Return: boolean rr)rrrr can_blinds zpubkey.can_blindcCsdS)z_Tell the maximum number of bits that can be handled by this key. :Return: int rr)rrrrsizesz pubkey.sizecCsdS)zSTell if the key object contains private components. :Return: bool rr)rrrrrszpubkey.has_privatecCs|S)zkConstruct a new key carrying only the public information. :Return: A new `pubkey` object. r)rrrr publickeyszpubkey.publickeycCs||kS)zF__eq__(other): 0, 1 Compare us to other for equality. )r )rotherrrr__eq__sz pubkey.__eq__cCs || S)zH__ne__(other): 0, 1 Compare us to other for inequality. )r/)rr.rrr__ne__sz pubkey.__ne__N)__name__ __module__ __qualname____doc__rr rrrrr!r%r'r(r)r*r+r,rr-r/r0rrrrr!s&   r)Z __revision__typesr"ZCrypto.Util.numberrrrrrs