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Collection of all Keyczar classes used to perform cryptographic functions:
encrypt, decrypt, sign and verify.

@author: arkajit.dey@gmail.com (Arkajit Dey)
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d��n||_ntj|jj|j|j��}||j|<||j|j<q�WdS(NsUnacceptable purpose: %ssNeed encrypted reader.s/Key sets may only have a single primary version(tkeydatatKeyMetadatatReadtGetMetadatatmetadatat_keystNonetprimary_versionttypetdefault_sizetIsAcceptablePurposetpurposeterrorstKeyczarErrort	encryptedt
isinstancetreaderstEncryptedReadertversionststatustkeyinfotPRIMARYtkeystReadKeytGetKeytversion_numberthash_id(tselftreadertversiontkey((s3/usr/lib/python2.7/site-packages/keyczar/keyczar.pyt__init__-s(			

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KeyVersion(Rtk((s3/usr/lib/python2.7/site-packages/keyczar/keyczar.pyt<lambda>FstdocsList of versions in key set.cCs|j|j�S(N(RR	(R((s3/usr/lib/python2.7/site-packages/keyczar/keyczar.pyR$Iss!The primary key for this key set.cCs
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    Parse the header and verify version, format info. Return key if exists.

    @param header: the bytes of the header of Keyczar output
    @type header: string

    @return: the key identified by the hash in the header
    @rtype: L{keys.Key}

    @raise BadVersionError: if header specifies an illegal version
    @raise KeyNotFoundError: if key specified in header doesn't exist
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    Return a Keyczar object created from FileReader at given location.

    @param location: pathname of the directory storing the key files
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    @return: a Keyczar to manage the keys stored at the given location
    @rtype: L{Keyczar}
    (RRtCreateReader(tlocation((s3/usr/lib/python2.7/site-packages/keyczar/keyczar.pyRascCsdS(s4Indicates whether purpose is valid. Abstract method.N((RR
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    Returns the key associated with the given key_id, a hash or a version.

    @param key_id: Either the hash identifier of the key or its version.
    @type key_id: string or L{keydata.KeyVersion}

    @return: key associated with this key_id or None if key_id doesn't exist.
    @rtype: L{keys.Key}

    @raise KeyNotFoundError: if key with given key_id doesn't exist
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sTo be used by Keyczart.cCsttj|��S(sBReturn a GenericKeyczar created from FileReader at given location.(R>RR/(R0((s3/usr/lib/python2.7/site-packages/keyczar/keyczar.pyR�scCstS(sAll purposes ok for Keyczart.(tTrue(RR
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    Adds a new key version with given status to key set.

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    next available version number.

    @param status: the status of the new key to be added
    @type status: L{keyinfo.KeyStatus}

    @param size: size of key in bits, uses default size if not provided.
    @type size: integer

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    Demotes the status of key with given version number.

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    Write this key set to the specified location.

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    @type encrypter: Encrypter
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    Encrypt the data and return the ciphertext.

    @param data: message to encrypt
    @type data: string

    @param encoder: function to perform final encoding. Defaults to Base64, use
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    @type encoder: function

    @return: ciphertext, by default Base64 encoded
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    @raise NoPrimaryKeyError: if no primary key can be found to encrypt
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    Create an encrypting stream capable of writing a ciphertext byte stream
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    Defaults to base64 encoding with no padding or line breaks. 
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    @type encoder: 'file-like' object

    @return: an encrypting stream capable of creating a ciphertext byte stream
    @rtype: EncryptingStreamWriter
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	tVerifiercBsDeZdZed��Zd�Zd�Zd�Zdd�Z	RS(sCapable of verifying only.cCsttj|��S(s3
    Return a Verifier object created from FileReader at given location.

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    Verifies the signature in the signed blob corresponds to the data
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    @type signed_data: string

    @param nonce: Nonce string that was used when the signature was
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    Verifies whether the signature corresponds to the given data. This is a
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    @param data: message that has been signed with sig
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    for no decoding.
    @type encoder: function

    @return: plaintext message
    @rtype: string

    @raise ShortCiphertextError: if length is too short to have Header, IV, Sig
    @raise BadVersionError: if header specifies an illegal version
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    @param decoder: the decoding stream to use on the incoming stream.
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    @type decoder: 'file-like' object

    @param buffer_size: Suggested buffer size for writing data (will be adjusted
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    @type buffer_size: integer

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    Sign given data and return corresponding signature.

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R6R7R8R=RRR�R�RR�(((s3/usr/lib/python2.7/site-packages/keyczar/keyczar.pyR�8s			tUnversionedSignercBs/eZdZed��Zd�Zd�ZRS(s�Capable of both signing and verifying. This outputs standard signatures
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	(R6R7R8R=RRR�(((s3/usr/lib/python2.7/site-packages/keyczar/keyczar.pyR�ws	it_SessioncBs�eZdZed��Zed��Zed��Zed��Zee	j
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  A utility object which holds a session key and, optionally, a nonce.  This class
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