U e9@sddlmZmZmZmZmZddlZddlmZddlm Z ddl m Z ddl mZmZmZGdddejeZGd d d ejeZed d d ZGdd d ejeZedeeZGdddeeejeZdS))ClassVarGenericOptionalTypeTypeVarN)encoding) exceptions)Encoder)EncryptedMessage StringFixerrandomc@szeZdZUdZejjZee e d<e j fe e jdddZe dddZe dd d Zeed d d Zeed ddZdS) PublicKeya= The public key counterpart to an Curve25519 :class:`nacl.public.PrivateKey` for encrypting messages. :param public_key: [:class:`bytes`] Encoded Curve25519 public key :param encoder: A class that is able to decode the `public_key` :cvar SIZE: The size that the public key is required to be SIZE) public_keyencodercCsH|||_t|jts"tdt|j|jkrDtd |jdS)Nz'PublicKey must be created from 32 bytesz,The public key must be exactly {} bytes long) decode _public_key isinstancebytesexc TypeErrorlenr ValueErrorformat)selfrrr*lib/python3.8/site-packages/nacl/public.py__init__$s   zPublicKey.__init__returncCs|jSNrrrrr __bytes__4szPublicKey.__bytes__cCs tt|Sr )hashrr"rrr__hash__7szPublicKey.__hash__otherrcCs&t||jsdStjt|t|SNF)r __class__naclbindingsZ sodium_memcmprrr'rrr__eq__:s zPublicKey.__eq__cCs ||k Sr rr,rrr__ne__?szPublicKey.__ne__N)__name__ __module__ __qualname____doc__r*r+Zcrypto_box_PUBLICKEYBYTESrrint__annotations__r RawEncoderrr rr#r%objectboolr-r.rrrrr s   r c@seZdZUdZejjZee e d<ejj Z ee e d<e jfee jdddZee jfee jdddd Zed d d Ze d d dZeedddZeedddZedd ddZdS) PrivateKeya{ Private key for decrypting messages using the Curve25519 algorithm. .. warning:: This **must** be protected and remain secret. Anyone who knows the value of your :class:`~nacl.public.PrivateKey` can decrypt any message encrypted by the corresponding :class:`~nacl.public.PublicKey` :param private_key: The private key used to decrypt messages :param encoder: The encoder class used to decode the given keys :cvar SIZE: The size that the private key is required to be :cvar SEED_SIZE: The size that the seed used to generate the private key is required to be r SEED_SIZE) private_keyrcCsT||}t|tr"t||jks4td|jtj |}||_ t ||_ dS)Nz>PrivateKey must be created from a {} bytes long raw secret key)rrrrrrrrr*r+Zcrypto_scalarmult_base _private_keyr r)rr:rZraw_public_keyrrrrWs   zPrivateKey.__init__)seedrrcCsL||}t|tr"t||jks4td|jtj |\}}||S)ah Generate a PrivateKey using a deterministic construction starting from a caller-provided seed .. warning:: The seed **must** be high-entropy; therefore, its generator **must** be a cryptographic quality random function like, for example, :func:`~nacl.utils.random`. .. warning:: The seed **must** be protected and remain secret. Anyone who knows the seed is really in possession of the corresponding PrivateKey. :param seed: The seed used to generate the private key :rtype: :class:`~nacl.public.PrivateKey` z7PrivateKey seed must be a {} bytes long binary sequence) rrrrr9rrrr*r+Zcrypto_box_seed_keypair)clsr<rZraw_pkZraw_skrrr from_seedns zPrivateKey.from_seedrcCs|jSr )r;r"rrrr#szPrivateKey.__bytes__cCstt|t|jfSr )r$typerrr"rrrr%szPrivateKey.__hash__r&cCst||jsdS|j|jkSr()rr)rr,rrrr-s zPrivateKey.__eq__cCs ||k Sr rr,rrrr.szPrivateKey.__ne__cCs|ttjtjdS)z~ Generates a random :class:`~nacl.public.PrivateKey` object :rtype: :class:`~nacl.public.PrivateKey` r)r r8rrr5)r=rrrgenerateszPrivateKey.generateN)r/r0r1r2r*r+Zcrypto_box_SECRETKEYBYTESrrr3r4Zcrypto_box_SEEDBYTESr9rr5rr r classmethodr>r#r%r6r7r-r.rArrrrr8Cs*  #r8_BoxBox)Zboundc@seZdZUdZejjZee e d<e e d<e e dddZe ddd Zeejfeee eed d d Zd ejfe ee ejedddZd ejfe ee eje dddZe dddZd S)rDa/ The Box class boxes and unboxes messages between a pair of keys The ciphertexts generated by :class:`~nacl.public.Box` include a 16 byte authenticator which is checked as part of the decryption. An invalid authenticator will cause the decrypt function to raise an exception. The authenticator is not a signature. Once you've decrypted the message you've demonstrated the ability to create arbitrary valid message, so messages you send are repudiable. For non-repudiable messages, sign them after encryption. :param private_key: :class:`~nacl.public.PrivateKey` used to encrypt and decrypt messages :param public_key: :class:`~nacl.public.PublicKey` used to encrypt and decrypt messages :cvar NONCE_SIZE: The size that the nonce is required to be. NONCE_SIZE _shared_key)r:rcCsFt|trt|tstdtj|jt j d|jt j d|_ dS)Nz5Box must be created from a PrivateKey and a PublicKeyr@) rr8r rrr*r+Zcrypto_box_beforenmencoderr5rF)rr:rrrrrs   z Box.__init__rcCs|jSr rFr"rrrr#sz Box.__bytes__)r=encodedrrcCs||}|||_|S)z[ Alternative constructor. Creates a Box from an existing Box's shared key. )__new__rrF)r=rIrZboxrrrrs  z Box.decodeN) plaintextnoncerrcCsn|dkrt|j}t||jkr0td|jtj|||j}| |}| |}t ||| ||S)a Encrypts the plaintext message using the given `nonce` (or generates one randomly if omitted) and returns the ciphertext encoded with the encoder. .. warning:: It is **VITALLY** important that the nonce is a nonce, i.e. it is a number used only once for any given key. If you fail to do this, you compromise the privacy of the messages encrypted. :param plaintext: [:class:`bytes`] The plaintext message to encrypt :param nonce: [:class:`bytes`] The nonce to use in the encryption :param encoder: The encoder to use to encode the ciphertext :rtype: [:class:`nacl.utils.EncryptedMessage`] N'The nonce must be exactly %s bytes long) r rErrrr*r+Zcrypto_box_afternmrFrGr Z _from_parts)rrKrLr ciphertextZ encoded_nonceencoded_ciphertextrrrencrypts$    z Box.encrypt)rNrLrrcCsb||}|dkr.|d|j}||jd}t||jkrLtd|jtj|||j}|S)a Decrypts the ciphertext using the `nonce` (explicitly, when passed as a parameter or implicitly, when omitted, as part of the ciphertext) and returns the plaintext message. :param ciphertext: [:class:`bytes`] The encrypted message to decrypt :param nonce: [:class:`bytes`] The nonce used when encrypting the ciphertext :param encoder: The encoder used to decode the ciphertext. :rtype: [:class:`bytes`] NrM) rrErrrr*r+Zcrypto_box_open_afternmrF)rrNrLrrKrrrdecrypt s z Box.decryptcCs|jS)a Returns the Curve25519 shared secret, that can then be used as a key in other symmetric ciphers. .. warning:: It is **VITALLY** important that you use a nonce with your symmetric cipher. If you fail to do this, you compromise the privacy of the messages encrypted. Ensure that the key length of your cipher is 32 bytes. :rtype: [:class:`bytes`] rHr"rrr shared_key3s zBox.shared_key)r/r0r1r2r*r+Zcrypto_box_NONCEBYTESrErr3r4rr8r rr#rBrr5rrCr rrr rPrQrRrrrrrDs<   . &_Keyc@sxeZdZUdZeed<eeed<edddZeddd Z e j fee j ed d d Z e j fd ee j edddZdS) SealedBoxa_ The SealedBox class boxes and unboxes messages addressed to a specified key-pair by using ephemeral sender's keypairs, whose private part will be discarded just after encrypting a single plaintext message. The ciphertexts generated by :class:`~nacl.public.SecretBox` include the public part of the ephemeral key before the :class:`~nacl.public.Box` ciphertext. :param recipient_key: a :class:`~nacl.public.PublicKey` used to encrypt messages and derive nonces, or a :class:`~nacl.public.PrivateKey` used to decrypt messages. .. versionadded:: 1.2 rr;) recipient_keycCs^t|tr"|jtjd|_d|_n8t|trP|jtjd|_|jjtjd|_n t ddS)Nr@z:SealedBox must be created from a PublicKey or a PrivateKey) rr rGrr5rr;r8rrr)rrUrrrrZs   zSealedBox.__init__rcCs|jSr r!r"rrrr#lszSealedBox.__bytes__)rKrrcCstj||j}||}|S)ay Encrypts the plaintext message using a random-generated ephemeral keypair and returns a "composed ciphertext", containing both the public part of the keypair and the ciphertext proper, encoded with the encoder. The private part of the ephemeral key-pair will be scrubbed before returning the ciphertext, therefore, the sender will not be able to decrypt the generated ciphertext. :param plaintext: [:class:`bytes`] The plaintext message to encrypt :param encoder: The encoder to use to encode the ciphertext :return bytes: encoded ciphertext )r*r+Zcrypto_box_sealrrG)rrKrrNrOrrrrPos zSealedBox.encryptzSealedBox[PrivateKey])rrNrrcCs4||}|jdkrtdtj||j|j}|S)a Decrypts the ciphertext using the ephemeral public key enclosed in the ciphertext and the SealedBox private key, returning the plaintext message. :param ciphertext: [:class:`bytes`] The encrypted message to decrypt :param encoder: The encoder used to decode the ciphertext. :return bytes: The original plaintext :raises TypeError: if this SealedBox was created with a :class:`~nacl.public.PublicKey` rather than a :class:`~nacl.public.PrivateKey`. Nz4SealedBoxes created with a public key cannot decrypt)rr;rr*r+Zcrypto_box_seal_openr)rrNrrKrrrrQs  zSealedBox.decryptN)r/r0r1r2rr4rrSrr#rr5r rPrQrrrrrTEs$   rT)typingrrrrrZ nacl.bindingsr*rrrZ nacl.encodingr Z nacl.utilsr r r Z Encodabler r8rCrDrSrTrrrrs   ,g