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편집 파일: cisco.cpython-39.pyc
a f�Wc�? � @ s� d Z ddlmZmZ ddlmZ ddlZe�e�Z ddl m Z ddl m Z mZmZmZ ddlmZ ddlmZmZmZmZmZmZ ddlm m Z g d �Z d Z G d d � d e j e j!�Z"G d d� de"�Z#G dd� de j$�Z%dS )z1 passlib.handlers.cisco -- Cisco password hashes � )�hexlify� unhexlify)�md5N)�warn)�right_pad_string� to_unicode� repeat_string�to_bytes)�h64)�unicode�u�join_byte_values�join_byte_elems�iter_byte_values� uascii_to_str)� cisco_pix� cisco_asa� cisco_type7s ��������������������������������c @ s6 e Zd ZdZd ZdZdZdZdZe j Z dZ dd� Z dS )r a� This class implements the password hash used by older Cisco PIX firewalls, and follows the :ref:`password-hash-api`. It does a single round of hashing, and relies on the username as the salt. This class only allows passwords <= 16 bytes, anything larger will result in a :exc:`~passlib.exc.PasswordSizeError` if passed to :meth:`~cisco_pix.hash`, and be silently rejected if passed to :meth:`~cisco_pix.verify`. The :meth:`~passlib.ifc.PasswordHash.hash`, :meth:`~passlib.ifc.PasswordHash.genhash`, and :meth:`~passlib.ifc.PasswordHash.verify` methods all support the following extra keyword: :param str user: String containing name of user account this password is associated with. This is *required* in order to correctly hash passwords associated with a user account on the Cisco device, as it is used to salt the hash. Conversely, this *must* be omitted or set to ``""`` in order to correctly hash passwords which don't have an associated user account (such as the "enable" password). .. versionadded:: 1.6 .. versionchanged:: 1.7.1 Passwords > 16 bytes are now rejected / throw error instead of being silently truncated, to match Cisco behavior. A number of :ref:`bugs <passlib-asa96-bug>` were fixed which caused prior releases to generate unverifiable hashes in certain cases. � TFc C s� | j }t|t�r|�d�}d}t|�| jkr^| jrVd| j| jf }tj j | j|d��n|t }| j }|r�t|t�r||�d�}|r�t|�dk r�|t |d�7 }|r�t|�dkr�d}nd}t||�}|r�||7 }t|��� }td d � t|�D ��}t�|��d �S ) a7 This function implements the "encrypted" hash format used by Cisco PIX & ASA. It's behavior has been confirmed for ASA 9.6, but is presumed correct for PIX & other ASA releases, as it fits with known test vectors, and existing literature. While nearly the same, the PIX & ASA hashes have slight differences, so this function performs differently based on the _is_asa class flag. Noteable changes from PIX to ASA include password size limit increased from 16 -> 32, and other internal changes. �utf-8Nz.Password too long (%s allows at most %d bytes))�msg� � r � c s s" | ]\}}|d d@ r|V qdS )� � N� )�.0�i�cr r �:/usr/lib/python3.9/site-packages/passlib/handlers/cisco.py� <genexpr>� � z+cisco_pix._calc_checksum.<locals>.<genexpr>�ascii)�_is_asa� isinstancer �encode�len� truncate_size� use_defaults�name�uh�excZPasswordSizeError� _DUMMY_BYTES�userr r r �digestr � enumerater Z encode_bytes�decode)�self�secretZasaZ spoil_digestr r. Zpad_sizer/ r r r �_calc_checksumg s4 � zcisco_pix._calc_checksumN)�__name__� __module__� __qualname__�__doc__r* r( Ztruncate_errorZtruncate_verify_rejectZ checksum_sizer+ Z HASH64_CHARS�checksum_charsr$ r4 r r r r r $ s )r c @ s e Zd ZdZd ZdZdZdS )r a� This class implements the password hash used by Cisco ASA/PIX 7.0 and newer (2005). Aside from a different internal algorithm, it's use and format is identical to the older :class:`cisco_pix` class. For passwords less than 13 characters, this should be identical to :class:`!cisco_pix`, but will generate a different hash for most larger inputs (See the `Format & Algorithm`_ section for the details). This class only allows passwords <= 32 bytes, anything larger will result in a :exc:`~passlib.exc.PasswordSizeError` if passed to :meth:`~cisco_asa.hash`, and be silently rejected if passed to :meth:`~cisco_asa.verify`. .. versionadded:: 1.7 .. versionchanged:: 1.7.1 Passwords > 32 bytes are now rejected / throw error instead of being silently truncated, to match Cisco behavior. A number of :ref:`bugs <passlib-asa96-bug>` were fixed which caused prior releases to generate unverifiable hashes in certain cases. r TN)r5 r6 r7 r8 r* r( r$ r r r r r � s r c s� e Zd ZdZd ZdZejZdZ dZ e d� fdd� �Z e dd � �Z d � fd d � Ze d d d��Zedd� �Zdd� Zdd� Ze d dd��Zed�Ze dd� �Z� ZS ) r a+ This class implements the "Type 7" password encoding used by Cisco IOS, and follows the :ref:`password-hash-api`. It has a simple 4-5 bit salt, but is nonetheless a reversible encoding instead of a real hash. The :meth:`~passlib.ifc.PasswordHash.using` method accepts the following optional keywords: :type salt: int :param salt: This may be an optional salt integer drawn from ``range(0,16)``. If omitted, one will be chosen at random. :type relaxed: bool :param relaxed: By default, providing an invalid value for one of the other keywords will result in a :exc:`ValueError`. If ``relaxed=True``, and the error can be corrected, a :exc:`~passlib.exc.PasslibHashWarning` will be issued instead. Correctable errors include ``salt`` values that are out of range. Note that while this class outputs digests in upper-case hexadecimal, it will accept lower-case as well. This class also provides the following additional method: .. automethod:: decode ��saltr �4 Nc sH t t| �jf i |��}� d urD|j� |�d�d�� t� fdd��|_|S )N�relaxed)r= c s � S �Nr r r: r r �<lambda>f r" z#cisco_type7.using.<locals>.<lambda>)�superr �using� _norm_salt�get� staticmethod�_generate_salt)�clsr; �kwds�subcls�� __class__r: r rA a s zcisco_type7.usingc C sL t |dd�}t|�dk r$tj�| ��t|d d� �}| ||dd � �� d�S )Nr# �hash� )r; �checksum)r r' r+ r, ZInvalidHashError�int�upper)rF rK r; r r r � from_stringi s zcisco_type7.from_stringc sh t t| �jf i |�� |d ur*| �|�}n4| jrV| �� }| �|�|ks^J d|f ��ntd��|| _d S )Nzgenerated invalid salt: %rzno salt specified)r@ r �__init__rB r) rE � TypeErrorr; )r2 r; rG rI r r rQ q s zcisco_type7.__init__Fc C sj t |t�stj�|dd��d| kr0| jkr8n n|S d}|r^t|tj� |dk rXdS | jS t|��dS )z� validate & normalize salt value. .. note:: the salt for this algorithm is an integer 0-52, not a string Zintegerr; r z"salt/offset must be in 0..52 rangeN) r% rN r+ r, ZExpectedTypeError�max_salt_valuer ZPasslibHashWarning� ValueError)rF r; r= r r r r rB | s zcisco_type7._norm_saltc C s t j�dd�S )Nr � )r+ �rngZrandintr r r r rE � s zcisco_type7._generate_saltc C s d| j t| j�f S )Nz%02d%s)r; r rM )r2 r r r � to_string� s zcisco_type7.to_stringc C s0 t |t�r|�d�}t| �|| j���d��� S )Nr r# )r% r r& r �_cipherr; r1 rO )r2 r3 r r r r4 � s zcisco_type7._calc_checksumr c C s: | � |�}t|j�d��}|�||j�}|r6|�|�S |S )z�decode hash, returning original password. :arg hash: encoded password :param encoding: optional encoding to use (defaults to ``UTF-8``). :returns: password as unicode r# )rP r rM r& rX r; r1 )rF rK �encodingr2 �tmp�rawr r r r1 � s zcisco_type7.decodez5dsfd;kfoA,.iyewrkldJKDHSUBsgvca69834ncxv9873254k;fg87c s0 | j � t� ��t� ��fdd�tt|��D ��S )z1xor static key against data - encrypts & decryptsc 3 s* | ]"\}}|t � �| � �A V qd S r> )�ord)r �idx�value��keyZkey_sizer; r r r! � s �z&cisco_type7._cipher.<locals>.<genexpr>)�_keyr' r r0 r )rF �datar; r r_ r rX � s �zcisco_type7._cipher)N)N)F)r )r5 r6 r7 r8 r* Z setting_kwdsr+ ZUPPER_HEX_CHARSr9 Zmin_salt_valuerS � classmethodrA rP rQ rB rD rE rW r4 r1 r ra rX � __classcell__r r rI r r ) s, # r )&r8 Zbinasciir r Zhashlibr ZloggingZ getLoggerr5 �log�warningsr Z passlib.utilsr r r r Zpasslib.utils.binaryr Zpasslib.utils.compatr r r r r r Zpasslib.utils.handlersZutils�handlersr+ �__all__r- ZHasUserContextZ StaticHandlerr r ZGenericHandlerr r r r r �<module> s V0